WO2012018049A1 - 端子付き電線、及びコネクタ - Google Patents
端子付き電線、及びコネクタ Download PDFInfo
- Publication number
- WO2012018049A1 WO2012018049A1 PCT/JP2011/067777 JP2011067777W WO2012018049A1 WO 2012018049 A1 WO2012018049 A1 WO 2012018049A1 JP 2011067777 W JP2011067777 W JP 2011067777W WO 2012018049 A1 WO2012018049 A1 WO 2012018049A1
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- WIPO (PCT)
- Prior art keywords
- core wire
- wire
- terminal
- water blocking
- blocking wall
- Prior art date
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/70—Insulation of connections
- H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/02—Cable terminations
- H02G15/04—Cable-end sealings
- H02G15/043—Cable-end sealings with end caps, e.g. sleeve closed at one end
- H02G15/046—Cable-end sealings with end caps, e.g. sleeve closed at one end with bores or protruding portions allowing passage of cable conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
- H01R4/184—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion
- H01R4/185—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section comprising a U-shaped wire-receiving portion combined with a U-shaped insulation-receiving portion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/183—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section
- H01R4/186—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping for cylindrical elongated bodies, e.g. cables having circular cross-section using a body comprising a plurality of cable-accommodating recesses or bores
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
- H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
- H01R4/188—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping having an uneven wire-receiving surface to improve the contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
Definitions
- the present invention relates to an electric wire with a terminal and a connector.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which a core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire.
- a region from the substrate part to the end of the insulating coating is covered with a heat shrinkable tube.
- One end of the heat-shrinkable tube covers a core wire crimped by a wire barrel and the other end is in close contact with the insulating coating.
- the substrate portion has a flat plate shape, there is a concern that a gap is formed between one end side of the heat shrinkable tube and the substrate portion. Then, there is a concern that water enters the heat-shrinkable tube from this gap and this water comes into contact with the core wire and the wire barrel. Then, we are anxious about generating troubles, such as the surface of a core wire or a wire barrel being oxidized.
- the present invention has been completed based on the above circumstances, and an object thereof is to provide a terminal-attached electric wire excellent in waterproofness.
- the present invention is a terminal-attached electric wire in which a terminal is connected to an electric wire formed by coating an outer periphery of a core wire with an insulating coating, and the terminal is mounted with the core wire exposed from an end of the insulating coating.
- a wire barrel that is crimped to the core wire and an extending portion that extends from the bottom plate, and is provided with a water blocking wall formed by molding a synthetic resin material on the extending portion,
- a cylindrical waterproof coating that covers the core wire in close contact with the outer surface of the waterproof wall and covers the end of the insulating coating is provided.
- the outer surface of the water blocking wall formed in the extending portion is in close contact with the inner surface of the water blocking coating. Therefore, it is suppressed that water permeates from between the water blocking wall and the water blocking coating. As a result, it is possible to suppress water from adhering to the core wire and the wire barrel by the water stop coating covering the core wire between the water blocking wall and the end of the insulating coating. As a result, according to this invention, the waterproofness of the electric wire with a terminal can be improved.
- FIG. 1 is a side view showing a terminal-attached electric wire according to Embodiment 1-1 of the present invention.
- FIG. 2 is a cutaway view of the main part showing the electric wire with terminal.
- FIG. 3 is an enlarged cross-sectional view of a main part showing the groove.
- FIG. 4 is a plan view showing a state where the bending process is completed.
- FIG. 5 is a plan view showing a state where the molding process is completed.
- FIG. 6 is an enlarged cross-sectional view of the main part showing the groove of the terminal-attached electric wire according to Embodiment 1-2 of the present invention.
- FIG. 7 is a side view showing a terminal-attached electric wire according to Embodiment 1-3 of the present invention.
- FIG. 8 is a side sectional view showing an electric wire with a terminal according to Embodiment 1-5 of the present invention.
- FIG. 9 is an enlarged cross-sectional view of the main part showing the extension part and the water blocking wall.
- FIG. 10 is a side view showing an electric wire with terminal according to Embodiment 1-6 of the present invention.
- FIG. 11 is a cutaway view of a main part showing a terminal-attached electric wire.
- FIG. 12 is a side view showing a terminal-attached electric wire according to Embodiment 1-7 of the present invention.
- FIG. 13 is a plan view showing an electric wire with terminal according to Embodiment 1-8 of the present invention.
- FIG. 14 is a plan view showing a state before the waterproof tape is wound.
- FIG. 14 is a plan view showing a state before the waterproof tape is wound.
- FIG. 15 is a side view showing a terminal-attached electric wire according to Embodiment 2-1 of the present invention.
- FIG. 16 is a plan view of the same.
- FIG. 17 is a cross-sectional view of a main part showing a terminal-attached electric wire.
- FIG. 18 is an enlarged cross-sectional view of a main part showing a water blocking wall.
- FIG. 19 is an enlarged cross-sectional view of a main part showing a continuous portion.
- FIG. 20 is a plan view showing a state where the bending process is completed.
- FIG. 21 is a plan view showing a state where the molding process is completed.
- FIG. 22 is a plan view showing a terminal according to Embodiment 2-1 of the present invention.
- FIG. 23 is an enlarged cross-sectional view of a main part showing a connecting portion of a terminal-attached electric wire according to Embodiment 2-2 of the present invention.
- FIG. 24 is a plan view showing a terminal-attached electric wire according to Embodiment 2-3 of the present invention.
- FIG. 25 is a side view of a terminal-attached electric wire according to Embodiment 3-1 of the present invention.
- FIG. 26 is a partially cutaway sectional view thereof.
- FIG. 27 is an enlarged end view taken along line III-III in FIG.
- FIG. 30 is an enlarged end view taken along line VI-VI in FIG.
- FIG. 31 is a plan view of a state in which the core wire is set on the wire barrel.
- FIG. 32 is a plan view after completion of crimping.
- FIG. 33 is a plan view of a female terminal before crimping operation according to Embodiment 3-2 of the present invention.
- FIG. 34 is a plan view showing a state in which the core wire is set on the wire barrel.
- FIG. 35 is a plan view after completion of crimping.
- FIG. 36 is a plan view of the female terminal before the crimping operation according to Embodiment 3-3 of the present invention.
- FIG. 37 is a plan view of the core wire set on the wire barrel.
- FIG. 38 is a plan view after completion of crimping.
- FIG. 39 is a side view showing the terminal-attached electric wire according to the embodiment 4-1 of the present invention.
- FIG. 40 is a cross-sectional view of a main part showing a terminal-attached electric wire.
- FIG. 41 is an enlarged cross-sectional view of the main part showing the extending part.
- FIG. 42 is a plan view showing a state in which the bending process is completed.
- FIG. 43 is a plan view showing a state where the molding process is completed.
- FIG. 44 is a side view showing a state in which the molding process is completed in the process of manufacturing the terminal-attached electric wire according to the embodiment 4-2.
- FIG. 45 is a plan view of the state of FIG. FIG.
- FIG. 46 is a plan view showing a state in which the bending process is completed.
- FIG. 47 is a side view of the state of FIG.
- FIG. 48 is a schematic view schematically showing the state of corrosion at the projecting portion of the extending portion.
- FIG. 49 is a schematic view schematically showing the state of corrosion at the convex part having no hole.
- FIG. 50 is a side view showing a state where the molding process is completed in the process of manufacturing the electric wire with terminal according to Embodiment 4-3.
- FIG. 51 is a side view showing a state where the bending process is completed.
- FIG. 52 is a side view showing the electric wire with terminal in the present embodiment.
- FIG. 53 is a cross-sectional view showing a cross-sectional configuration of a terminal-attached electric wire.
- FIG. 53 is a cross-sectional view showing a cross-sectional configuration of a terminal-attached electric wire.
- FIG. 54 is a side view showing the configuration of the female terminal piece before the water blocking wall is molded.
- FIG. 55 is a plan view showing the configuration of the female terminal piece before the water blocking wall is molded.
- FIG. 57 is a plan view showing the configuration of the female terminal after the water blocking wall is molded.
- FIG. 57 is a cross-sectional view showing a cross-sectional configuration of the joint portion after the water blocking wall is molded, and is a cross-sectional view corresponding to the cross section at the position AA in FIG. 58 is a cross-sectional view showing the shape of the concavo-convex portion, and is a cross-sectional view corresponding to the cross-section at the BB position in FIG.
- FIG. 59 is a cross-sectional view showing the shape of the concavo-convex portion, and is a cross-sectional view corresponding to the cross-section at the CC position in FIG.
- FIG. 60 is a plan view showing the structure of the chain terminal after the bending process is completed.
- FIG. 61 is a plan view showing the structure of the chain terminal after the molding process is completed.
- FIG. 62 is a cross-sectional view showing the shape of an uneven portion according to another embodiment (9).
- FIG. 63 is a cross-sectional view showing the shape of an uneven portion according to another embodiment (10).
- FIG. 64 is a plan view showing the shape of the uneven portion according to another embodiment (11).
- FIG. 65 is a side view showing an electric wire with terminal according to Embodiment 6-1 of the present invention.
- FIG. 66 is a plan view showing an electric wire with a terminal.
- FIG. 67 is a cutaway cross-sectional view showing the main part of the electric wire with terminal.
- FIG. 68 is an enlarged cross-sectional view of the main part showing the extending part.
- FIG. 69 is a plan view showing a state where the bending process is completed.
- FIG. 70 is a plan view showing a state where the molding process is completed.
- FIG. 71 is a sectional view showing the connector.
- FIG. 72 is a cross-sectional view showing a connector in a state where the entire terminal is accommodated in a cavity as a comparative example.
- FIG. 73 is a perspective view of an electric wire with terminal according to Embodiment 7-1 of the present invention.
- FIG. 74 is a side view of the electric wire with terminal.
- FIG. 75 is a cutaway sectional view of the main part of the electric wire with terminal.
- FIG. 76 is a perspective view of a resin processed product used for the water blocking wall.
- FIG. 77 is a cross-sectional view of a water blocking wall erected on the bottom plate of the terminal.
- FIG. 78 is a plan view showing a state in which a plurality of terminal pieces are connected to a carrier so that they are arranged.
- FIG. 79 is an explanatory diagram (plan view) illustrating a process in which the terminal piece to which the resin workpiece is attached is heat-treated.
- FIG. 80 is an explanatory view (perspective view) showing a process of placing the electric wire on the bottom plate of the terminal.
- FIG. 81 is a plan view of a terminal with an electric wire placed on the bottom plate.
- FIG. 82 is a plan view of an electric wire to which a terminal is attached by crimping a wire barrel and an insulation barrel.
- FIG. 83 is an explanatory view (perspective view) showing a state where an unheated heat-shrinkable tube is put on the electric wire to which the terminal is attached.
- FIG. 84 is a cutaway cross-sectional view of the main part showing a state in which an unheated heat-shrinkable tube is put on an electric wire to which a terminal is attached.
- FIG. 85 is an explanatory view (perspective view) showing a state in which a protrusion has pierced the peripheral edge of the heat-shrinkable tube.
- FIG. 86 is a cutaway cross-sectional view of the main part showing a state in which the peripheral edge portion of the heat-shrinkable tube is stuck into the protrusion.
- FIG. 87 is an explanatory view (perspective view) showing a state in which a protrusion pierced into the heat-shrinkable tube is folded down.
- FIG. 88 is a cutaway cross-sectional view of a relevant part of an electric wire with terminal according to the embodiment 7-2.
- FIG. 89 is a perspective view of a terminal according to Embodiment 7-3.
- FIG. 90 is a cutaway cross-sectional view of a main part of a terminal-attached electric wire in which a water stop coating is put on the terminal according to Embodiment 7-3.
- FIG. 91 is a perspective view of an electric wire with a terminal provided with a terminal according to Embodiment 7-3.
- ridge (striking part) 410 ... Electric wire with terminal 411 ... Electric wire 412 ... Female terminal (terminal) 413 ... Core wire 414 ... Insulation coating 415 ... Bottom plate 417 ... Wire barrel 419 ... Extension part 419A ... Convex part 419B ... Hole part 419C ... (Extension part) end face 419D ... (Extension part) end part 419F ... Depression part 422 ... Water blocking wall 423 ... Resin ring 424 ... Heat shrinkable tube 425 ... Water blocking coating 427 ... Terminal piece X, Y, Z ... Corrosion path 510 ... Electric wire with terminal 511 ... Electric wire 512 ...
- Outer groove (groove formed on the opposite surface) 610 ... Electric wire with terminal 611 ... Electric wire 612 ...
- a terminal-attached electric wire 10 according to Embodiment 1-1 of the present invention will be described with reference to FIGS. 1 to 5.
- the electric wire with terminal 10 according to the present embodiment has a female terminal 12 (corresponding to a terminal) connected to the end of the electric wire 11.
- the electric wire 11 includes one core wire 13 formed by twisting a plurality of fine metal wires, and an insulating coating 14 made of a synthetic resin that covers the outer periphery of the core wire 13.
- the core wire 13 is comprised from arbitrary metals as needed, such as copper, a copper alloy, aluminum, an aluminum alloy. In this embodiment, aluminum or an aluminum alloy is used.
- the core wire 13 is exposed by peeling off the insulating coating 14.
- the core wire 13 may be a single core wire.
- the female terminal 12 is formed by pressing a metal plate material into a predetermined shape.
- a metal which comprises the female terminal 12 arbitrary metals, such as copper and a copper alloy, can be employ
- a plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- the female terminal 12 has a bottom plate 15 on which the insulation coating 14 and the core wire 13 of the electric wire 11 are placed.
- a pair of insulation barrels 16 project from the side edges of the bottom plate 15.
- the insulation barrel 16 is pressure-bonded to the insulating coating 14 so as to be held from the outside of the insulating coating 14 in a state where the insulating coating 14 and the core wire 13 of the electric wire 11 are placed on the bottom plate 15.
- the bottom plate 15 is formed with a pair of wire barrels 17 protruding from the side edges of the bottom plate 15 at positions closer to the end of the core wire 13 than the insulation barrel 16.
- the wire barrel 17 is crimped to the core wire 13 so as to be held from the outside of the core wire 13 in a state where the insulating coating 14 and the core wire 13 of the electric wire 11 are placed on the bottom plate 15.
- a plurality of recesses 18 are formed in the area corresponding to the wire barrel 17 in the bottom plate 15 and the wire barrel 17 on the surface on which the core wire 13 is placed.
- the concave portion 18 has a substantially quadrangular shape, and specifically has a substantially parallelogram shape.
- the recess 18 includes a pair of first sides that are substantially orthogonal to the direction in which the core wire 13 extends (left and right direction in FIG. 4), and a pair of second sides that intersect the direction in which the core wire 13 extends at an angle smaller than 90 °. .
- the adjacent recesses 18 are arranged such that the first sides are arranged in a straight line, and the second sides are arranged in a straight line.
- die (not shown) used when pressing the recessed part 18 can be formed by forming a some groove
- side of the recessed part 18 adjacent about the extending direction of the core wire 13 is distribute
- the hole edges of the plurality of recesses 18 are in sliding contact with the surface of the core wire 13, the contact area between the hole edges of the recess 18 and the core wire 13 is increased. As a result, the electrical resistance value between the female terminal 12 and the core wire 13 is lowered. be able to.
- the bottom plate 15 is formed with an extending portion 40 that further extends in the direction in which the core wire 13 extends.
- the extending portion 40 is a groove portion 19 in which a surface connected to the surface of the bottom plate 15 on the side where the core wire 13 is placed is formed in a concave shape.
- the groove portion 19 has a substantially U-shaped cross section and opens upward.
- a cross-sectional shape of the groove part 19 it is good also as a semicircle shape, for example, and it can be made into arbitrary shapes as needed.
- a connecting tube portion 20 is formed which further extends in the direction in which the core wire 13 extends to form a tubular shape and connect to a mating terminal (not shown).
- An elastic contact piece 21 that elastically contacts the mating terminal is provided in the connection cylinder portion 20.
- a water blocking wall 22 is formed in the groove portion 19 by molding a synthetic resin material.
- a synthetic resin material for forming the water blocking wall 22 a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and multiple types of synthetic resin materials may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 22 is formed by filling the groove portion 19. Furthermore, the water blocking wall 22 is formed so as to surround the outer periphery of the groove portion 19 over the entire periphery.
- the cross-section of the water blocking wall 22 has a substantially square shape with rounded corners.
- a resin ring 23 made of synthetic resin is fitted on the end of the electric wire 11. Specifically, a resin ring 23 having a circular cross section is formed at the end of the insulating coating 14 and at a position behind the portion where the insulation barrel 16 is crimped (in the direction opposite to the exposed core wire 13). It is fitted.
- the inner diameter of the resin ring 23 is set to be substantially the same as the outer diameter of the insulating coating 14. Thereby, the resin ring 23 can be easily fitted on the end portion of the electric wire 11.
- the inner diameter of the resin ring 23 is the same as the outer diameter of the insulating coating 14, the inner diameter of the resin ring 23 is slightly larger than the outer diameter of the insulating coating 14, and the inner diameter of the resin ring 23. And a case slightly smaller than the outer shape of the coating 14.
- thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used.
- Any synthetic resin material can be used.
- synthetic resin material only 1 type may be used and a multiple types of synthetic resin material may be mixed and used.
- a polyamide-based thermoplastic resin is used.
- a tubular waterproof coating 25 that covers the core wire 13 is provided between the waterproof wall 22 and the end of the insulating coating 14. More specifically, the insulating portion 22 is insulated from the portion where the water blocking wall 22 is formed in the groove portion 19, the portion where the core wire 13, the wire barrel 17, the insulation barrel 16 and the resin ring 23 are externally fitted, and the resin ring 23. The region up to the end of the coating 14 is covered with a water-stop coating 25 made of a synthetic resin material.
- the water blocking coating 25 includes a heat shrinkable tube 24.
- an adhesive layer or an adhesive layer (not shown) is formed on the inner surface of the heat shrinkable tube 24.
- the adhesive layer or the pressure-sensitive adhesive layer is heated or softened or melted to express adhesiveness or tackiness. In addition, it is good also as a structure which does not provide an adhesive layer or an adhesion layer in the inner surface of the heat contraction tube 24.
- FIG. The length dimension of the heat shrinkable tube 24 is set longer than the length dimension of the region from the water blocking wall 22 to the resin ring 23.
- the inner surface of the heat-shrinkable tube 24 is in close contact with the outer peripheral surface of the water blocking wall 22 without any gap in the state where the heat-shrinkable tube 24 is heated and contracted, and on the outer peripheral surface and the entire periphery of the resin ring 23. It is in close contact with no gap.
- the synthetic resin material constituting the water blocking wall 22 a material that exhibits adhesiveness by being heated and softened or melted may be used.
- the water blocking wall 22 can be softened or melted in the same step as the step of heating the heat shrinkable tube 24 to bond the inner surface of the heat shrinkable tube 24 and the water blocking wall 22.
- the synthetic resin material constituting the resin ring 23 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the resin ring 23 in the same process as the process of heating the heat shrinkable tube 24, the resin ring 23 can be softened or melted, and the inner surface of the heat shrinkable tube 24 and the resin ring 23 can be bonded.
- the resin ring 23 and the outer peripheral surface of the insulating coating 14 can be bonded.
- a carrier 26 having a strip shape and a plurality of terminal pieces 27 connected to the side edges of the carrier 26 are formed.
- the carrier 26 is formed with feed holes 28 arranged at substantially equal intervals along the longitudinal direction.
- a feed claw (not shown) provided in the processing machine is engaged with the feed hole 28.
- a plurality of terminal pieces 27 are connected to the carrier 26 so as to be arranged at substantially equal intervals along the longitudinal direction.
- the terminal piece 27 includes a bottom plate 15 on which the insulation coating 14 and the core wire 13 of the electric wire 11 are placed, an insulation barrel 16 that protrudes from the bottom plate 15 and is pressure-bonded to the insulation coating 14, and projects from the bottom plate 15 to the core wire 13.
- a wire barrel 17 to be crimped and an extending portion 40 extending from the bottom plate 15 are provided.
- a plurality of recesses 18 may be formed on the surface of the wire barrel 17 on the side where the core wire 13 is placed. Moreover, you may form said recessed part 18 in a process different from a punching process.
- the core wire 13 is formed in the portion corresponding to the extending portion 40 so as to extend in the direction in which the core wire 13 extends in the state where the core wire 13 is placed on the bottom plate 15.
- a groove portion 19 is formed in which the surface on the formed side has a concave shape.
- a connecting cylinder portion 20 is formed which extends from the groove portion 19 in a direction corresponding to the direction in which the core wire 13 extends (see FIG. 4).
- the synthetic resin material is molded into the groove portion 19 of the terminal piece 27 while sequentially feeding the terminal pieces 27 by engaging the feeding holes 28 formed in the carrier 26 with the feeding claws. More specifically, first, a portion of the groove portion 19 where the water blocking wall 22 is to be formed is sandwiched from above and below by a pair of molds (not shown). Next, a molten synthetic resin material is injected into the cavity formed in the mold. After the synthetic resin material is solidified in the mold, the pair of molds are opened, and the terminal piece 27 on which the water blocking wall 22 is formed is detached from the mold. The above-described process is continuously performed on the plurality of terminal pieces 27 connected to the carrier 26 at substantially constant intervals (see FIG. 5). Thereby, the chain terminal 41 is formed.
- the insulation coating 14 of the electric wire 11 is peeled to expose the core wire 13.
- the resin ring 23 is fitted on the end of the insulating coating 14.
- the resin ring 23 is externally fitted to a portion (a portion located on the side opposite to the core wire 13) of the insulating coating 14 that is different from the region to which the wire barrel 17 is crimped.
- a crimping process is performed on the terminal piece 27. More specifically, the core wire 13 and the insulation coating 14 exposed from the electric wire 11 are placed on the bottom plate 15 of the terminal piece 27. Thereafter, the insulation barrel 16 and the wire barrel 17 are bent by a mold (not shown) so as to be held from the outside of the insulating coating 14 and the core wire 13, respectively. As a result, the insulation barrel 16 is crimped to the insulating coating 14, and the wire barrel 17 is crimped to the core wire 13.
- a cutting step for cutting the carrier 26 and the terminal piece 27 is performed in the same step as the above-described crimping step. As a result, each terminal piece 27 is cut from the carrier 26 to become the female terminal 12, and the terminal-attached electric wire 10 connected to the electric wire 11.
- the heat shrinkable tube 24 is inserted from the electric wire 11 side or the female terminal 12 side, and is disposed in a region from the water blocking wall 22 to the insulating coating 14 beyond the resin ring 23.
- the inner diameter of the heat-shrinkable tube 24 can be inserted from the female terminal 12 side relatively easily by setting it to be larger than the outer shape of the connecting cylinder part 20 in the state before heating.
- the heat-shrinkable tube 24 may be inserted through the electric wire 11 in advance before performing the crimping process.
- the heat-shrinkable tube 24 is shrunk by executing a heating process of heating with a heating device (not shown). Thereby, the inner surface of the heat-shrinkable tube 24 is brought into close contact with the outer surfaces of the water blocking wall 22 and the resin ring 23 without a gap. The heat-shrinkable tube 24 is in close contact with the end of the insulating coating 14 at a position behind the resin ring 23 without a gap. Thus, the terminal-attached electric wire 10 is completed.
- the water blocking wall 22 is formed on the extended portion 40 extended from the bottom plate 15 of the wire barrel 17.
- the extending portion 40 is the groove portion 19, and the water blocking wall 22 is formed by filling the groove portion 19.
- the outer peripheral surface of the water blocking wall 22 is in close contact with the inner surface of the heat shrinkable tube 24 without any gap, water can enter from between the water blocking wall 22 and the heat shrinkable tube 24. Is also suppressed.
- the resin ring 23 is fitted on the end portion of the insulating coating 14, and the inner surface of the resin ring 23 is in close contact with the outer surface of the insulating coating 14 without a gap. Further, the inner surface of the heat shrinkable tube 24 is in close contact with the resin ring 23 without any gap.
- the core wire 13 or the wire barrel 17 can be prevented from being melted by electrolytic corrosion.
- the core wire 13 is made of aluminum or an aluminum alloy and the female terminal 12 is formed by forming a tin plating layer on the surface of copper or a copper alloy, aluminum having a relatively large ionization tendency or This is particularly effective because the core wire 13 made of an aluminum alloy may be dissolved by electrolytic corrosion.
- the specific gravity of aluminum or aluminum alloy is relatively small, the electric wire 11 can be reduced in weight.
- the water stop coating 25 includes the heat shrinkable tube 24.
- the inner diameter of the heat-shrinkable tube 24 is relatively large, so that it can be easily disposed on the outer periphery of the region.
- the inner surface of the heat shrinkable tube 24 can be brought into close contact with the water blocking wall 22 and the end of the insulating coating 14 without a gap.
- the heat shrinkable tube 24 as the water blocking coating 25
- the work efficiency of the process of arranging the heat shrinkable tube 24 on the outer periphery of the region extending from the water blocking wall 22 to the end of the insulating coating 14 is improved. Can do.
- the heating process for shrinking the heat shrinkable tube 24 is performed, so that The water wall 22 can be securely adhered without a gap, and the heat shrinkable tube 24 and the end of the insulating coating 14 can be reliably adhered without a gap.
- the heat shrinkable tube 24 having the adhesive layer or the adhesive layer formed on the inner peripheral surface as the waterstop coating 25
- the heat shrinkage is performed on the outer periphery of the region extending from the waterstop wall 22 to the end of the insulating coating 14.
- the working efficiency of the step of arranging the tube 24 can be improved, and the adhesion between the heat shrinkable tube 24 and the end portions of the water blocking wall 22 and the insulating coating 14 can be improved.
- the water blocking wall 22 is formed by continuously performing a molding process on the plurality of terminal pieces 27 connected to the carrier 26. As a result, the working efficiency of the molding process can be improved.
- the water blocking wall 22 is formed in the molding process. That is, in the present embodiment, the water blocking wall 22 is formed when the chain terminal 41 is formed.
- compression-bonding process, a cutting process, and a covering process are general processes, the electric wire 10 with a terminal can be manufactured, without requiring a special process.
- waterproofing of the core wire 13 and the wire barrel 17 can be achieved while suppressing an increase in manufacturing cost.
- the cutting process is executed in the same process as the crimping process. Therefore, compared with the case where a cutting process and a crimping
- Embodiment 1-2 of the present invention will be described with reference to FIG.
- the water blocking wall 22 is filled in the groove portion 19 and does not cover the outer periphery of the groove portion 19. Further, the water blocking wall 22 is formed so as to rise above the side edge that constitutes the groove portion 19.
- the inner surface of the heat-shrinkable tube 24 is in close contact with the water blocking wall 22 without any gap and is in close contact with the outer peripheral surface of the groove 19 without any gap. Since the configuration other than the above is substantially the same as that of Embodiment 1-1, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the water blocking wall 22 is filled in the groove portion 19, it is possible to prevent water from entering from the groove portion 19 and attaching water to the core wire 13 and the wire barrel 17. Further, the inner surface of the heat shrinkable tube 24 is in close contact with the water blocking wall 22 without any gap, and is in close contact with the outer peripheral surface of the groove portion 19 without any gap. Water can be prevented from entering from the gap.
- Embodiment 1-3 of the present invention will be described with reference to FIG.
- the resin ring 23 is omitted.
- the heat-shrinkable tube 24 is covered with a region from the portion of the groove portion 19 where the water blocking wall 22 is formed to the end of the wire barrel 17, the insulation barrel 16, and the insulating coating 14.
- the inner surface of the heat shrinkable tube 24 is in close contact with the outer surface of the insulating coating 14. Since the configuration other than the above is substantially the same as that of Embodiment 1-1, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the region from the portion of the groove 19 where the water blocking wall 22 is formed to the end of the wire barrel 17, the insulation barrel 16, and the insulating coating 14 is formed by the heat shrinkable tube 24. Waterproof. Thereby, it can suppress that water adheres to the core wire 13 and the wire barrel 17.
- the resin ring 23 is not necessary, and therefore the number of parts can be reduced. Furthermore, since the process of externally fitting the resin ring 23 to the end of the electric wire 11 is not necessary, the manufacturing process can be reduced.
- the adhesive layer is melted and bonded during the heat shrinkage, and the heat shrinkable tube 24, the insulating coating 14, and the water blocking wall 22 are connected. It is possible to further suppress water from entering from the gap.
- an elastic tube having rubber elasticity is used as the water blocking coating 25.
- the inner diameter of the elastic tube in the natural state is set to be smaller than the outer diameter of the water blocking wall 22 and the outer diameter of the insulating coating 14. Since the configuration other than the above is substantially the same as that of Embodiment 1-3, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the elastic tube is expanded from the electric wire 11 side or the female terminal 12 side with the diameter expanded, and insulated from the water blocking wall 22 over the resin ring 23. It arrange
- the water can be prevented from entering the boundary between the elastic tube, the water blocking wall 22 and the insulating coating 14 by a simple process in which the elastic tube is disposed at a predetermined position and then deformed to return. . For this reason, the heating process required when the heat-shrinkable tube 24 is used as the water-stop coating 25 becomes unnecessary, so that the manufacturing cost can be reduced.
- the terminal according to this embodiment is a male terminal 50.
- the extending portion 51 extending from the bottom plate 15 has a flat plate shape.
- the water blocking wall 52 is formed so as to cover the extended portion 51 over the entire circumference.
- the cross-sectional shape of the water blocking wall 52 has a quadrangular shape with four rounded corners.
- a male tab 53 extends in the direction in which the core wire 13 extends from the extending portion 51. This male tab 53 is electrically connected to a counterpart terminal (not shown).
- the extending portion 51 extending from the bottom plate 15 has a flat plate shape
- the outer surface of the water blocking wall 52 and the inner surface of the water blocking coating 25 are in close contact with each other. It is possible to prevent water from entering between the extension portion 51 and the extension portion 51. As a result, the core wire 13 and the wire barrel 17 can be waterproofed.
- Embodiment 1-6 of the present invention will be described with reference to FIGS.
- a rubber elastic body 70 having a cylindrical shape is externally fitted to the end of the insulating coating 14.
- the inner surface of the elastic body 70 is in close contact with the outer surface of the insulating coating 14.
- the outer surface of the elastic body 70 is in close contact with the inner surface of the waterproof coating 25.
- the elastic body 70 can be formed of any rubber such as NBR or silicone rubber as required.
- the elastic body 70 may be a rubber tube formed by cutting an elongated rubber tube into a predetermined length.
- the elastic body 70 may be a so-called rubber plug formed by injecting molten rubber into a mold (not shown). It is good also as a structure by which the lip which protrudes in the circumferential direction is formed in the outer surface of a rubber stopper.
- water can be prevented from entering between the water-stop coating 25 and the end of the insulating coating 14.
- the waterproofness of the core wire 13 and the wire barrel 17 can be improved.
- the elastic body 70 is configured to be covered with the water blocking coating 25 and disposed inside the water blocking coating 25, but is not limited to this, and among the ends of the elastic body 70, An end portion (right end portion in FIG. 10) located on the side opposite to the insulation barrel 16 may be exposed to the outside from the end portion of the water blocking coating 25.
- Embodiment 1-7 of the present invention will be described with reference to FIG.
- the insulation barrel 16 is crimped around the outer side of the elastic body 70 disposed at the end of the insulating coating 14. Since the configuration other than the above is substantially the same as that of Embodiment 1-7, the same members are denoted by the same reference numerals, and redundant description is omitted.
- the insulation barrel 16 is pressure-bonded to the outside of the elastic body 70, the adhesion between the inner surface of the elastic body 70 and the outer surface of the insulating coating 14 is improved. Further, it is possible to suppress the displacement of the elastic body 70. Thereby, it can suppress reliably that water permeates from between the water stop coating 25 and the insulating coating 14.
- the elastic body 70 is covered with the water blocking coating 25 and is arranged inside the water blocking coating 25.
- the end portion (the right end portion in FIG. 12) located on the opposite side of the insulation barrel 16 may be configured to be exposed outward from the end portion of the water blocking coating 25.
- the waterproof coating 25 is formed in a tubular shape as a whole by winding a sheet of waterproof tape 80 in a region extending from the waterproof wall 22 to the end of the insulating coating 14. It is said.
- a sheet of waterproof tape 80 an adhesive tape in which an adhesive layer (not shown) is formed or an adhesive tape in which an adhesive layer (not shown) is formed can be used.
- the waterproof tape 80 is wound with the adhesive layer or the pressure-sensitive adhesive layer inside.
- a well-known self-bonding tape can be used as the waterproofing tape 80.
- the core wire 13 and the wire barrel 17 can be waterproofed by a simple method of winding the water-stop tape 80 in the form of a sheet.
- the terminal may be a so-called LA terminal in which a disk-like connecting portion is formed continuously with the extending portion 40, and a through hole is formed in the connecting portion.
- the terminal can be shaped.
- the cross-section of the water blocking wall 22 has a substantially square shape, but is not limited thereto, and may be a circular shape, an elliptical shape, an oval shape, or the like.
- the polygonal shape may be sufficient, and it can be made into arbitrary shapes as needed.
- the water blocking wall 22 is formed before the step of crimping the wire barrel 17 to the core wire 13.
- the present invention is not limited to this, and the water blocking wall 22 is a wire to the core wire 13.
- the barrel 17 may be formed after being crimped.
- the core wire 13 is made of aluminum or an aluminum alloy. However, the present invention is not limited to this, and the core wire 13 may be made of copper or a copper alloy. It is good also as a structure formed.
- the terminal is made of copper or a copper alloy and the tin plating layer is formed on the surface. However, the present invention is not limited to this, and the terminal may be made of any metal as necessary. .
- the crimping process and the cutting process are performed in the same process.
- the present invention is not limited to this, and the cutting process may be performed after the crimping process is performed.
- the insulation barrel 16 is formed on the terminal, but the insulation barrel 16 may be omitted.
- the water stop coating 25 covers a region from the portion of the groove portion 19 where the water stop wall 22 is formed to the portion where the wire barrel 17, the insulation barrel 16, and the resin ring 23 are externally fitted. It is good also as a structure.
- the resin ring 23 is configured to have an annular shape.
- the present invention is not limited to this.
- the resin ring 23 is formed with a slit and has a substantially C-shaped cross section. Also good. Accordingly, since the resin ring 23 can be easily expanded in diameter, for example, after the terminal is crimped to the electric wire 11, the resin ring 23 can be expanded and externally fitted to the electric wire 11.
- the technology disclosed in this specification is a terminal-attached electric wire in which a terminal is connected to an electric wire formed by coating an outer periphery of a core wire with an insulating coating, and the terminal is exposed from an end portion of the insulating coating.
- a wire barrel having a bottom plate on which the core wire is placed and being crimped to the core wire, and an extending portion extending from the bottom plate, and formed by molding a synthetic resin material on the extending portion.
- a water wall is provided, and a cylindrical water blocking coating is provided that covers the core wire in close contact with the outer surface of the water blocking wall and between the water blocking wall and the end of the insulating coating.
- the technology disclosed in the present specification is a terminal connected to an electric wire formed by coating an outer periphery of a core wire with an insulation coating, and the terminal is exposed from an end of the insulation coating.
- a water barrel having a bottom plate to be placed and being crimped to the core wire, and an extending portion extending from the bottom plate, and provided with a water blocking wall formed by molding synthetic resin on the extending portion.
- the core wire is covered between the water blocking wall and the end of the insulating coating by a cylindrical water blocking coating in a state where the wire barrel is crimped to the core wire, and the water blocking wall
- the outer surface of is in close contact with the inner surface of the waterproof coating.
- the technology disclosed in this specification is a chain terminal in which a plurality of terminal pieces are connected to a side edge of a carrier having a band shape, and the terminal piece is a core wire in a state of being cut from the carrier.
- the terminal piece has a bottom plate on which the core wire exposed from the end portion of the insulating coating is placed.
- the core wire is covered between the water blocking wall and the end of the insulating coating by a cylindrical water blocking coating while being crimped to the core wire, and the outer surface of the water blocking wall is the water blocking coating. Close contact with the inner surface.
- the outer surface of the water blocking wall formed in the extending portion is in close contact with the inner surface of the water blocking coating. Therefore, it is suppressed that water permeates from between the water blocking wall and the water blocking coating. As a result, it is possible to suppress water from adhering to the core wire and the wire barrel by the water stop coating covering the core wire between the water blocking wall and the end of the insulating coating.
- the water blocking wall is formed so as to surround the outer periphery of the extending portion over the entire periphery.
- the water blocking wall can be in close contact with the inner surface of the water blocking coating over the entire circumference, so that the waterproof property can be further improved.
- the extension part is a groove part in which a surface connected to a surface of the bottom plate on which the core wire is placed has a concave shape, and the water blocking wall is formed by filling the groove part. Is preferred.
- the water blocking wall is formed by filling the groove portion, it is possible to reliably prevent water from adhering to the core wire placed on the bottom plate.
- an adhesive layer or an adhesive layer is formed on the inner peripheral surface of the water blocking coating.
- the inner peripheral surface of the water blocking coating and the outer periphery of the water blocking wall can be reliably adhered.
- the water-stop coating is preferably a heat shrinkable tube.
- the inner diameter of the heat-shrinkable tube is relatively large in a state before heating, it can be easily externally fitted in a region extending between the water blocking wall and the end portion of the insulating coating. it can. Thereafter, the inner surface of the heat-shrinkable tube can be brought into close contact with the outer surface of the water blocking wall by being contracted by heating.
- a heat-shrinkable tube as the water-stop coating, it is possible to improve the work efficiency of the process of fitting the heat-shrink tube in a region between the water blocking wall and the end of the insulating coating.
- the water-stop coating is preferably an elastic tube having rubber elasticity.
- the elastic tube in a state where the diameter of the elastic tube is expanded, the elastic tube is externally fitted between the water blocking wall and the end portion of the insulating coating, and then the elastic tube is restored and deformed. Then, the inner surface of the elastic tube is in close contact with the outer surface of the water blocking wall.
- the elastic tube can be covered in a region extending between the water blocking wall and the end portion of the insulating coating by a simple process.
- the inner peripheral surface of the water blocking coating is in close contact with the outer peripheral surface of the insulating coating.
- water can be prevented from entering from between the outer surface of the waterproof coating and the insulating coating, so that it is possible to reliably prevent water from adhering to the core wire and the wire barrel.
- a resin ring is externally fitted to the end of the insulating coating, an inner peripheral surface of the resin ring is in close contact with an outer peripheral surface of the insulating coating, and an outer peripheral surface of the resin ring is the waterproof coating. It is preferable to be in close contact with the inner peripheral surface.
- the gap between the end portion of the insulating coating and the waterproof coating is reliably sealed via the resin ring. Therefore, it can suppress reliably that water adheres to a core wire and a wire barrel.
- a cylindrical rubber elastic body is fitted on the end of the insulating coating, and the inner peripheral surface of the elastic body is in close contact with the outer peripheral surface of the insulating coating, and the outer periphery of the elastic body.
- the surface is preferably in close contact with the inner peripheral surface of the water blocking coating.
- the gap between the end portion of the insulating coating and the waterproof coating is reliably sealed via the elastic body.
- the elastic body can be brought into close contact with the end portion of the insulating coating by a simple method of fitting outside the end portion of the insulating coating in a state where the diameter of the elastic body is expanded and deforming, and then performing a return deformation.
- the core wire is made of aluminum or an aluminum alloy. More specifically, the specific gravity of aluminum or aluminum alloy is relatively small, so that the electric wire can be reduced in weight. On the other hand, since aluminum or aluminum alloy has a relatively high ionization tendency, it easily dissolves when electrolytic corrosion occurs. According to said aspect, since a core wire and a wire barrel are reliably water-stopped by a water stop material, it is especially effective when a core wire consists of aluminum or aluminum alloy.
- the technology disclosed in the present specification is a method for manufacturing a terminal-attached electric wire in which a terminal is connected to an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and by punching a metal plate into a predetermined shape.
- a cylindrical water-stop coating between the water-stop wall and the end portion of the insulation coating thereby bringing the inner peripheral surface of the water-stop coating into close contact with the outer surface of the water-stop wall
- a covering step of covering the core wire with the water blocking coating
- the water blocking wall is formed in the molding process. Since the subsequent crimping step, cutting step, and covering step are general steps for manufacturing a terminal-attached electric wire, the terminal-attached electric wire can be manufactured without performing a special step. As a result, the core wire and the wire barrel can be waterproofed while suppressing an increase in manufacturing cost.
- the following embodiment is preferable. It is preferable to perform a bending step of forming a groove portion by bending the surface on the core line side of the extending portion into a concave shape, and filling the groove portion with the synthetic resin material in the molding step.
- the water blocking wall is formed by filling the groove portion, it is possible to reliably prevent water from adhering to the core wire placed on the bottom plate.
- the cutting step is preferably performed in the same step as the crimping step.
- the working efficiency can be improved as compared with the case where the cutting step and the crimping step are performed in different steps.
- an electric wire with a terminal described in Japanese Patent Laid-Open No. 2000-259883 is known.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which a core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire.
- a region from the substrate part to the end of the insulating coating is covered with a heat shrinkable tube.
- One end of the heat-shrinkable tube covers a core wire crimped by a wire barrel and the other end is in close contact with the insulating coating.
- the substrate portion has a flat plate shape
- a gap is formed between one end side of the heat shrinkable tube and the substrate portion.
- water enters the heat-shrinkable tube from this gap and this water comes into contact with the core wire and the wire barrel.
- problems such as oxidation of the surface of the core wire or the wire barrel may occur.
- the technology disclosed in this specification has been completed based on the above-described circumstances, and an object thereof is to provide a terminal and an electric wire with a terminal excellent in waterproofness.
- the electric wire with terminal 210 includes an electric wire 211 and a female terminal 212 (corresponding to a terminal) connected to the terminal of the electric wire 211.
- the electric wire 211 includes a core wire 213 formed by twisting a plurality of fine metal wires and an insulating coating 214 made of a synthetic resin that covers the outer periphery of the core wire 213.
- the core wire 213 is comprised from arbitrary metals as needed, such as copper, a copper alloy, aluminum, an aluminum alloy. In this embodiment, aluminum or an aluminum alloy is used.
- the core wire 213 is exposed by peeling off the insulating coating 214.
- the core wire 213 may be a single core wire.
- the female terminal 212 is positioned at the rear side of the wire barrel 217, the rectangular tube-shaped connection portion 220, the wire barrel 217 formed via the connecting portion 219 behind the connection portion 220.
- An insulation barrel 216 is provided.
- the female terminal 212 is formed by pressing a metal plate into a predetermined shape.
- the connection part 220 is provided with an elastic contact piece 221 that can be elastically connected to a male terminal (not shown) inserted from the front of the connection part 220 therein.
- the wire barrel 217 includes a first bottom plate 217A on which the core wire 213 exposed from the electric wire 211 is placed, and a pair of wire barrel pieces 217B and 217B that rises upward from both side edges of the first bottom plate 217A. It is configured. As shown in FIG. 17, the wire barrel 217 has the core wire 213 between the wire barrel pieces 217B and 217B and the first bottom plate 217A in a state where the core wire 213 of the electric wire 211 is placed on the first bottom plate 217A. The wire barrel 217 is crimped to the core wire 213 by caulking.
- a plurality of recesses 218 are formed on the crimping surface of the wire barrel 217 that is crimped by both the wire barrel pieces 217B and 217B, that is, the surface that comes into contact with the core wire 213 along with the crimping.
- the concave portion 218 has a substantially square shape, and specifically has a substantially parallelogram shape.
- the pair of recesses 218 adjacent to each other in the extending direction (front-rear direction) of the core wire 213 are arranged so as to overlap in the front-rear direction, the entire region in the direction (width direction) orthogonal to the extending direction of the core wire 213 is provided.
- the core wire 213 can be crimped.
- the fixing force between the core wire 213 and the wire barrel 217 can be improved.
- the edges of the plurality of recesses 218 are brought into sliding contact with the surface of the core wire 213 in accordance with the crimping, so that the edges of the recesses 218 break through the insulating oxide film formed on the surface of the core wire 213 and come into contact with the core wire 213. Will do. Therefore, the contact area between the lip of the recess 218 and the core wire 213 increases, and as a result, the electrical resistance value between the female terminal 212 and the core wire 213 can be reduced.
- the insulation barrel 216 extends rearward of the first bottom plate 217A of the wire barrel 217, and is opposed to the second bottom plate 216A on which the insulating coating 214 of the electric wire 211 is placed, from both side edges of the second bottom plate 216A. And a pair of insulation barrel pieces 216B and 216B that rise upward. As shown in FIG. 17, the insulation barrel 216 is insulated so-called overlap type by holding it from the outside of the insulation coating 214 in a state where the insulation coating 214 of the electric wire 211 is placed on the second bottom plate 216A. The cover 214 is caulked and pressure-bonded. As a metal constituting the female terminal 212, any metal such as copper, a copper alloy or the like can be adopted as necessary.
- a plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- connection part 2119 has an upper surface on the side where the core wire 213 is placed bent into a concave shape, and has a substantially U-shaped cross section.
- the connecting portion 219 includes a bottom plate 219A extending rearward from the connecting portion 220, and a pair of side plates 219B and 219B that rise upward from both side edges of the bottom plate 219A. Both side plates 219B and 219B are formed to be continuous with both wire barrel pieces 217B and 217B, respectively.
- a cross-sectional shape of the connection part 219 it may be, for example, a semicircular shape, and may be an arbitrary shape as necessary.
- the connecting portion 219 is provided with a water blocking wall 222 formed by molding synthetic resin.
- a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin can be used. As for said synthetic resin, only 1 type may be used and multiple types of synthetic resin may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 222 is formed so as to surround the outer periphery of the connecting portion 219 over the entire periphery. That is, a portion corresponding to the water blocking wall 222 in the connecting portion 219 is embedded in the water blocking wall 222.
- the cross-sectional shape of the water blocking wall 222 has a substantially rectangular shape with rounded corners.
- a resin ring 223 is fitted on the end of the electric wire 211. More specifically, a resin ring 223 having a circular cross section is provided at the end of the insulating coating 214 at a position behind the portion where the insulation barrel 216 is crimped (in the direction opposite to the exposed core wire 213). It is fitted on the insulating coating 214 in close contact with the entire circumference.
- the inner diameter of the resin ring 223 is set substantially the same as the outer diameter of the insulating coating 214.
- substantially the same means that the inner diameter of the resin ring 223 is the same as the outer diameter of the insulating coating 214, the inner diameter of the resin ring 223 is slightly larger than the outer diameter of the insulating coating 214, and the inner diameter of the resin ring 223 is And a case where it is slightly smaller than the outer shape of the insulating coating 214. Thereby, the resin ring 223 can be easily fitted on the end portion of the electric wire 211.
- a synthetic resin material constituting the resin ring 223 a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin or a synthetic rubber may be used. Any synthetic resin material can be used depending on the case. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- Heat shrink tube 224 The area from the water blocking wall 222 to the portion where the wire barrel 217, the insulation barrel 216, and the resin ring 223 are externally fitted, and the region from the resin ring 223 to the insulation coating 214, as shown in FIG. It is covered with a heat-shrinkable tube 224 (corresponding to a waterproof coating) made of resin.
- a heat-shrinkable tube 224 corresponding to a waterproof coating
- an adhesive layer or an adhesive layer (not shown) is formed on the inner surface of the heat shrinkable tube 224.
- the adhesive layer or the pressure-sensitive adhesive layer is heated and softened or melted to exhibit adhesiveness or tackiness.
- the length dimension of the heat shrinkable tube 224 in the front-rear direction is set to a length dimension that can cover a region from the end of the water blocking wall 222 on the connection part 220 side to the position where the resin ring 223 is externally fitted. ing.
- the inner peripheral surface of the heat-shrinkable tube 224 is in close contact with the outer peripheral surface of the water blocking wall 222 with no gap when the heat-shrinkable tube 224 is heated and contracted. Further, the inner peripheral surface of the heat shrinkable tube 224 is in close contact with the outer peripheral surface of the resin ring 223 without any gap.
- a resin that exhibits adhesiveness by being softened or melted by heating may be used as the synthetic resin constituting the water blocking wall 222. In this case, in the step of heating the heat shrinkable tube 224, the water blocking wall 222 is softened or melted, and the inner peripheral surface of the heat shrinkable tube 224 and the outer peripheral surface of the water blocking wall 222 are bonded. it can.
- the synthetic resin constituting the resin ring 223 a resin that exhibits adhesiveness by being softened or melted by heating may be used.
- the resin ring 223 in the step of heating the heat-shrinkable tube 224, the resin ring 223 can be softened or melted to bond the inner peripheral surface of the heat-shrinkable tube 224 and the outer peripheral surface of the resin ring 223.
- the resin ring 223 by forming the resin ring 223 from the synthetic resin material as described above, the inner peripheral surface of the resin ring 223 and the outer peripheral surface of the insulating coating 214 can be bonded.
- a continuous portion 225 that is continuous with the rear end surface of the water blocking wall 222 on the wire barrel 217 side is formed integrally with the water blocking wall 222.
- the connecting portion 225 covers the outer peripheral surfaces of the bottom plate 219A of the connecting portion 219 and the pair of side plates 219B, 219B of the connecting portion 219 with a substantially uniform synthetic resin layer over the entire circumference. Is formed.
- the connecting portion 225 includes a bottom plate portion 225A that covers the bottom plate 219A and a pair of side plate portions 225B and 225B that covers both side plates 219B.
- the continuous portion 225 has a groove shape opened upward, and the rear end portion of the continuous portion 225 is open rearward. Further, the side plate portions 225B and 225B can be bent and deformed in a direction in which the distal end portions approach or separate from each other with the bottom plate portion 225A as a base end portion. That is, the cross section of the connecting portion 225 that is orthogonal to the direction in which the core wire 213 extends has a smaller resin occupation area than the cross section of the water blocking wall 222. As shown in FIG. 16, the continuous portion 225 is formed from the rear end surface of the water blocking wall 222 to a position slightly ahead of the front end edge of the wire barrel 217, and the continuous portion 225, the wire barrel 217, A slight gap is formed between them.
- the core wire 213 is strongly compressed when the wire barrel 217 is crimped, as shown in FIGS.
- the leading end of the core wire 213 can be accommodated from the rear end opening of the connecting portion 225.
- the rear opening edge of the continuous portion 225 is formed with an inclined surface 225C (corresponding to a guide surface) that is inclined straight so that the frontage becomes wider toward the rear.
- the inclined surface 225C plays a role of guiding the core wire 213 to the normal accommodation position when the core wire 213 enters the region surrounded by the bottom plate portion 225A and the side plate portions 225B and 225B from the rear.
- a plurality of terminal pieces 227 are connected to the carrier 226 side by side at substantially equal intervals along the longitudinal direction. Further, the carrier 226 is formed with feed holes 228 arranged at substantially equal intervals along the longitudinal direction. A feed claw (not shown) provided in the processing machine is engaged with the feed hole 228. In the punching process, a plurality of recesses 218 may be formed on the crimping surface of the wire barrel 217, or the recesses 218 may be formed in a process different from the punching process.
- a bending process is performed on the terminal piece 227 on which the punching process has been performed.
- the terminal piece 227 is bent in this bending step, the terminal piece 227 is formed longer in the direction in which the core wire 213 extends, and the connecting portion 219 and the connecting portion 220 are formed.
- the water blocking wall 222 is connected to the connecting portion 219 of the terminal piece 227 while sequentially feeding the terminal pieces 227.
- the connecting portion 225 is molded. More specifically, first, a portion of the connecting portion 219 where the water blocking wall 222 and the connecting portion 225 are to be formed is sandwiched from above and below by a pair of molds (not shown). Next, a synthetic resin in a molten state is injected into a molding space formed inside the mold.
- the pair of molds are opened, and the terminal piece 227 on which the water blocking wall 222 and the connecting portion 225 are formed is detached from the mold.
- the above steps are sequentially performed on the plurality of terminal pieces 227 connected to the carrier 226 at substantially constant intervals.
- the connecting portion 225 is formed in a groove shape that opens upward (in a direction orthogonal to the direction in which the core wire extends), so that the mold can be easily opened in the vertical direction. be able to.
- the shape of the molding die for molding the continuous portion 225 can be simplified, and the cost can be reduced.
- the insulation coating 214 of the electric wire 211 is peeled to expose the core wire 213. Thereafter, the resin ring 223 is fitted on the end of the insulating coating 214.
- the resin ring 223 is externally fitted to a position behind the position where the insulation barrel 216 is crimped in the insulating coating 214 (a portion located on the opposite side of the wire barrel 217 with respect to the insulation barrel 216).
- the resin ring 223 is externally fitted so as to be in close contact with the outer surface of the insulating coating 214 over the entire circumference.
- a crimping process is performed on the terminal piece 227. More specifically, the core wire 213 and the insulating coating 214 exposed from the electric wire 211 are placed on the terminal piece 227. Thereafter, the two wire barrel pieces 217B and 217B and the two insulation barrel pieces 216B and 216B are caulked from the outside of the core wire 213 and the insulation coating 214, respectively, by a mold (not shown). As a result, the wire barrel 217 is crimped to the core wire 213, and the insulation barrel 216 is crimped to the insulating coating 214.
- both side plate portions 225B and 225B in the continuous portion 225 are both wire barrel pieces 217B and 217B. It can be bent and deformed following the deformation. Thereby, it can suppress that the resin layer of the connection part 225 breaks or a resin layer peels from the connection part 219.
- FIG. 1
- the wire barrel 217 is strongly caulked and crimped to the core wire 213, the region surrounded by the bottom plate portion 225A and the side plate portions 225B and 225B in the connecting portion 225 when the core wire 213 extends forward.
- the tip of the core wire 213 can be accommodated. Thereby, it can suppress that a core wire presses the rear surface of a connection part, and a connection part is damaged.
- an inclined surface 225 ⁇ / b> C is formed at the rear end opening edge of the continuous portion 225 so that the frontage becomes wider toward the rear, so that the tip of the core wire 213 is not caught by the rear end surface of the continuous portion 225.
- the core wire 213 can be guided to a region surrounded by the bottom plate portion 225A and the side plate portions 225B and 225B. Thereby, it can suppress more reliably that the core wire 213 presses the rear-end surface of the connection part 225.
- FIG. 1 A perspective view of the core wire 213 .
- a cutting step for cutting the carrier 226 and the terminal piece 227 is executed simultaneously with the above-described crimping step.
- each terminal piece 227 is cut from the carrier 226 to be a female terminal 212 connected to the electric wire 211.
- the female terminal 212 connected to the electric wire 211 may be formed by crimping and connecting the electric wire 211 to the female terminal 212 cut from the carrier 226.
- the covering process is executed. More specifically, the heat-shrinkable tube 224 is inserted from the connection part 220 side, and is covered from the water blocking wall 222 over the resin ring 223 to the insulating coating 214.
- the inner diameter of the heat-shrinkable tube 224 is larger than the outer diameter of the connection part 220 in the state before heating, the entire female terminal 212 can be inserted from the connection part 220 side relatively easily.
- the heat-shrinkable tube 224 may be inserted through the electric wire 211 in advance before performing the crimping process.
- the heat-shrinkable tube 224 is contracted by executing a heating process of heating with a heating device (not shown).
- a heating device not shown
- the inner surface of the heat shrinkable tube 224 is brought into close contact with the outer surface of the water blocking wall 222, the outer surface of the resin ring 223 and the insulating coating 214 without any gap.
- the electric wire 210 with a terminal is completed by the above.
- the connection portion 220 by heating the connection portion 220 in an upward direction, even if the water stop wall 222 is melted in the heating step, the synthetic resin material constituting the water stop wall 222 is connected to the connection portion 220. It can suppress flowing in. Thereby, electrical connection reliability with the male terminal of the other party in the connection part 220 can be improved.
- the water stop wall 222 is provided in the connection part 219, it can suppress that water permeates from the connection part 219 and water adheres to the core wire 213 and the wire barrel 217. Furthermore, since the outer peripheral surface of the water blocking wall 222 is in close contact with the inner peripheral surface of the heat shrinkable tube 224 without any gaps, water enters between the water blocking wall 222 and the heat shrinkable tube 224. It is also suppressed.
- the resin ring 223 is externally fitted to the end portion of the insulating coating 214, and the inner surface of the heat shrinkable tube 224 is in close contact with the resin ring 223 without any gap. Therefore, since it can suppress reliably that water permeates from the edge part side of the insulation coating 214, it can suppress more reliably that water adheres to the core wire 213 and the wire barrel 217.
- the metal constituting the core wire 213 and the metal constituting the female terminal 212 are different, if water adheres to both the core wire 213 and the wire barrel 217, electrolytic corrosion occurs in the core wire 213 or the wire barrel 217. Is concerned. According to this embodiment, since the core wire 213 and the wire barrel 217 are reliably waterproofed by the heat shrinkable tube 224, it is possible to suppress the core wire 213 or the wire barrel 217 from being melted by electrolytic corrosion.
- the core wire 213 is made of aluminum or an aluminum alloy and the female terminal 212 is formed by forming a tin plating layer on the surface of copper or copper alloy, aluminum or aluminum having a relatively large ionization tendency This is particularly effective because the core wire 213 made of an aluminum alloy may be dissolved by electrolytic corrosion. Since aluminum or aluminum alloy has a relatively small specific gravity, the electric wire 211 can be reduced in weight.
- the connecting portion 225 extends rearward and is provided integrally with the water blocking wall 222, so that the connecting portion 219 and the synthetic resin
- the length dimension of the interface can be set longer in the front-rear direction than in the case where the continuous portion 225 is not formed.
- the connecting portion 219 is formed so as to be connected to the wire barrel 217.
- the portion may be bent and deformed following the deformation of the wire barrel piece 217B.
- both side plate portions 225B and 225B in the continuous portion 225 are both wire barrel pieces 217B and 217B. It can be bent and deformed following the deformation. Thereby, it can suppress that the resin layer of the connection part 225 breaks or a resin layer peels from the connection part 219.
- the region 225 ⁇ / b> A and the side plate portions 225 ⁇ / b> B and 225 ⁇ / b> B are surrounded by the region 225 ⁇ / b> B.
- the tip of the core wire 213 can be accommodated. Thereby, it can suppress that the core line 213 presses the rear surface of the connection part 225, and the connection part 225 is damaged.
- an inclined surface 225 ⁇ / b> C is formed at the rear end opening edge of the continuous portion 225 so that the frontage becomes wider toward the rear, so that the tip of the core wire 213 is not caught by the rear end surface of the continuous portion 225.
- the core wire 213 can be guided to a region surrounded by the bottom plate portion 225A and the side plate portions 225B and 225B. Thereby, it can suppress more reliably that the core wire 213 presses the rear-end surface of the connection part 225.
- the water-stop coating is composed of the heat-shrinkable tube 224.
- the inner diameter of the heat-shrinkable tube 224 is relatively large, so that it can be easily disposed on the outer periphery of the region.
- shrinking by heating the inner surface of the heat shrinkable tube 224 can be brought into close contact with the outer surface of the water blocking wall 222 and the outer surface of the end portion of the insulating coating 214 without any gap.
- the heat-shrinkable tube 224 as the water-stop coating, it is possible to improve the work efficiency of the process of arranging the heat-shrink tube 224 on the outer periphery of the region extending from the water blocking wall 222 to the end of the insulating coating 214. it can. Further, since an adhesive layer or an adhesive layer is formed on the inner peripheral surface of the heat shrinkable tube 224, by performing a heating process for shrinking the heat shrinkable tube 224, the inner surface of the heat shrinkable tube 224 is fixed to the inner surface of the heat shrinkable tube 224.
- the outer surface of the water wall 222 can be securely adhered without a gap, and the heat shrinkable tube 224 and the outer surface of the end portion of the insulating coating 214 can be reliably adhered without a gap.
- the heat shrinkable tube 224 having the adhesive layer or the adhesive layer formed on the inner peripheral surface as the water blocking coating heat is applied to the outer periphery of the region from the water blocking wall 222 to the end of the insulating coating 214.
- the working efficiency of the process of covering the shrinkable tube 224 can be improved.
- the adhesion between the heat shrinkable tube 224 and the outer surface of the water blocking wall 222 and the outer surface of the end portion of the insulating coating 214 can be improved.
- the water blocking wall 222 is formed by continuously performing a molding process on the plurality of terminal pieces 227 connected to the carrier 226. As a result, the working efficiency of the molding process can be improved.
- the connecting part 225 is formed in a groove shape opened upward, the mold can be easily opened in the vertical direction. Thereby, the shape of the molding die for molding the continuous portion 225 can be simplified, and the cost of the molding die can be reduced.
- a cutting process is performed in the same process as a crimping
- Embodiment 2-2 of the present invention will be described with reference to FIG.
- the terminal-attached electric wire 230 according to the present embodiment is obtained by changing the peripheral structure of the connecting portion 225 according to the embodiment 2-1, and the configuration, operation, and effect common to the embodiment 2-1 are duplicated. The description is omitted.
- the same reference numerals are used for the same configurations as those in the embodiment 2-1.
- the continuous portion 231 is formed by covering only the inner surface of the connecting portion 219 (the upper surface of the bottom plate 219A and the opposing surfaces of the side plates 219B and 219B) with a substantially uniform synthetic resin layer. That is, the continuous portion 231 includes a bottom plate portion 231A that covers the upper surface of the bottom plate 219A, and a pair of side plate portions 231B and 231B that cover the opposing surfaces of both side plates 219B.
- the inner surface of the heat shrinkable tube 224 is in close contact with the outer peripheral surface of the connecting portion 219, the front end surfaces of both side plates 219B and 219B of the connecting portion 219, and the front end surfaces of both side plate portions 231B and 231B of the connecting portion 231. ing.
- the quantity of the synthetic resin which comprises the connection part 231 can be reduced, manufacturing cost can be reduced.
- the amount of the synthetic resin in the continuous portion 231 is reduced and the synthetic resin layer does not surround the connecting portion 219 over the entire circumference, the both side plate portions 231B in the continuous portion 231 are both wires.
- the barrel pieces 217B and 217B are easily bent and deformed following the deformation of the barrel pieces 217B and 217B. Thereby, it can suppress that the resin layer of the connection part 231 is damaged, or the resin layer peels from the connection part 219.
- Embodiment 2-3 of the present invention will be described with reference to FIG.
- the electric wire with terminal 240 of the present embodiment is obtained by shifting the water blocking wall 222 of the embodiment 2-1 to the wire barrel 217 side, and overlaps with the configuration, operation, and effect common to the embodiment 2-1. Therefore, the description is omitted.
- the same reference numerals are used for the same configurations as those in the embodiment 2-1.
- the water blocking wall 41 of the present embodiment is provided at the center in the front-rear direction of the continuous portion 225 as shown in FIG. That is, the portion where the connecting portion 219 is molded has an H shape in plan view.
- the position where the water blocking wall 41 is provided can be appropriately set according to the length dimension of the core wire 213 accommodated in the connecting portion 225.
- the terminal is the female terminal 212, but is not limited thereto, and is a male terminal provided with a male tab that is further extended in the direction in which the core wire 213 extends from the connecting portion 219.
- it may be a so-called LA terminal in which a disk-shaped connection portion is formed continuously with the connecting portion 219 and a through hole is formed in the connection portion.
- the cross section of the water blocking wall 222 has a substantially square shape, but is not limited thereto, and may be a circular shape, an elliptical shape, an oval shape, or the like.
- a polygonal shape such as, for example, may be used, and an arbitrary shape may be used as necessary.
- the waterproof coating may be configured such that a sheet-shaped waterproof tape is wound around a region from the waterproof wall 222 to the end of the insulating coating 214.
- the water blocking wall 222 is formed before the step of crimping the wire barrel 217 to the core wire 213, but the present invention is not limited to this.
- the barrel 217 may be formed after being crimped.
- the core wire 213 is made of aluminum or an aluminum alloy.
- the present invention is not limited to this, and the core wire 213 may be made of copper or a copper alloy. It is good also as a structure formed.
- a terminal is good also as a structure which consists of arbitrary metals as needed. .
- the crimping process and the cutting process are performed in the same process, but the present invention is not limited thereto, and the cutting process may be performed after the crimping process is performed. After performing a cutting process, you may perform a crimping
- the insulation barrel 216 is formed on the female terminal, but the insulation barrel 216 may be omitted.
- the waterproof coating (heat-shrinkable tube 224, elastic tube) is connected to the wire barrel 217, the insulation barrel 216, and the resin ring from the portion of the connecting portion 219 where the waterproof wall 222 is formed. It is good also as a structure which coat
- the resin ring 223 has an annular configuration, but the present invention is not limited to this.
- the resin ring 223 has a slit and a cross-sectional shape that is substantially C-shaped. Also good. Accordingly, since the resin ring 223 can be easily expanded in diameter, for example, after the terminal is crimped to the electric wire 211, the resin ring 223 can be expanded and externally fitted to the electric wire 211.
- the guide surface is configured to be an inclined surface that is straightly inclined so that the front end opening edge of the connecting portion 225 is widened.
- the present invention is not limited to this. You may form in the R surface which is.
- the technology disclosed in the present specification as means for solving the above problems is a terminal-attached electric wire in which a terminal is connected to an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and the terminal is connected to a conductive member.
- a water stop wall formed by molding a synthetic resin is provided on the part, and is in close contact with the outer surface of the water stop wall and the outer surface of the end portion of the insulating coating, A cylindrical water-stop coating covering the core wire is provided therebetween, and the water stop wall is connected to the water stop wall and extends to the wire barrel side along the outer surface of the connecting portion.
- the connecting part is provided integrally, and this connecting part is a direction in which the core wire extends.
- the area occupied by the resin the By setting narrower than the area occupied by the resin in the cross section of the cut-off wall, and is capable flexural deformation in the cross section perpendicular to the.
- the technology disclosed in the present specification is a terminal connected to the core wire exposed from an electric wire formed by coating the outer periphery of the core wire with an insulating coating, and the terminal is connected to a conductive member.
- a wire barrel that is crimped to the core wire exposed from the end of the insulating coating, and a connecting portion that connects the connecting portion and the wire barrel, and synthetic resin is used for the connecting portion.
- a water blocking wall formed by molding is provided. The core wire is in close contact with the outer surface of the water blocking wall and the outer surface of the end portion of the insulating coating, and extends between the water blocking wall and the end portion of the insulating coating.
- the water stop wall is provided with a continuous portion extending to the wire barrel side along the outer surface of the connecting portion. It is formed as a single piece, and this continuous portion is orthogonal to the direction in which the core wire extends.
- the area occupied by the resin is resiliently deformable by being set narrower than the area occupied by the resin in the cross section of the water-stop wall in the cross section.
- the water blocking wall is provided at the connecting portion, it is possible to prevent water from entering from between the connecting portion and the water blocking wall. Furthermore, since the water blocking coating is in close contact with the outer surface of the water blocking wall, it is possible to prevent water from entering from between the water blocking coating and the outer surface of the water blocking wall. Thereby, since the area
- the connecting portion extends to the wire barrel side and is provided integrally with the water blocking wall, so that the connecting portion and the synthetic resin constituting the water blocking wall and the connecting portion are connected to the connecting portion.
- the length dimension of the interface can be set longer in the direction extending from the connecting portion side to the wire barrel side than in the case where the continuous portion is not formed. Thereby, even when a connection part is eroded from the connection part side with water etc., time until water reaches a core line can be lengthened.
- the peripheral portion on the wire barrel side of the connecting portion may be bent and deformed following the deformation of the wire barrel.
- the connecting portion receives stress due to deformation of the connecting portion, the resin layer of the connecting portion is damaged or the resin layer is easily peeled off from the connecting portion.
- the area occupied by the resin in the cross section of the continuous portion is set to be narrower than the area occupied by the resin in the cross section of the water blocking wall, so the continuous portion follows the deformation of the wire barrel. And can be bent and deformed. Thereby, it can suppress that the resin layer of a connection part breaks or a resin layer peels from a connection part.
- the connecting portion is provided in a concave shape including a bottom plate and a pair of side plates rising from both side edges of the bottom plate to the core wire side. It is good also as a structure formed in groove shape along.
- the pair of side plates of the connecting portion may be bent and deformed to the core wire side following the deformation of the wire barrel.
- the resin layer of the connecting portion is formed in a groove shape along the outer surface of the connecting portion, the portion formed along the both side plates in the connecting portion is deformed by the wire barrel. It can follow and bend and deform to the core side. Thereby, it can suppress that the resin layer of a connection part breaks or peels from a connection part.
- the mold since the continuous portion is formed in a groove shape, the mold can be opened in a direction orthogonal to the direction in which the core wire extends when the molding die is opened after the continuous portion is molded. Thereby, the shape of the molding die can be simplified, and the cost of the molding die can be reduced.
- the connecting portion may be formed so as to open to the wire barrel side and accommodate the core wire.
- the tip of the core wire when the core wire is strongly compressed when the wire barrel is crimped, the tip of the core wire can be accommodated in the continuous portion when the core wire extends forward. Thereby, it can suppress that a core wire presses the rear surface of a connection part, and a connection part is damaged.
- the water blocking wall may be configured to further surround the outer periphery of the connecting portion over the entire periphery.
- the water blocking wall can be in close contact with the inner surface of the water blocking coating over the entire circumference, so that the waterproof property can be further improved.
- a resin ring may be externally fitted to the end of the insulating coating, and the inner surface of the water blocking coating may be in close contact with the resin ring.
- the metal constituting the core wire and the metal constituting the terminal may be different.
- the core wire and the wire barrel are surely waterproofed by the waterproof coating, so that the core wire or the wire barrel can be prevented from being melted by electrolytic corrosion. For this reason, it is particularly effective when the metal constituting the core wire is different from the metal constituting the terminal.
- the core wire may be made of aluminum or an aluminum alloy.
- the electric wire can be reduced in weight.
- aluminum or aluminum alloy has a relatively high ionization tendency, it easily dissolves when electrolytic corrosion occurs.
- a core wire and a wire barrel are reliably water-stopped by a water-stop coating, it is especially effective when a core wire consists of aluminum or an aluminum alloy.
- the inner peripheral surface of the water blocking coating and the region extending from the water blocking wall to the end of the insulating coating can be closely adhered.
- the water blocking coating may be a heat shrinkable tube.
- the outer periphery of the region can be easily covered with the heat-shrinkable tube. Thereafter, the inner surface of the heat-shrinkable tube can be brought into close contact with the outer surface of the water blocking wall and the outer surface of the end portion of the insulating coating by being contracted by heating.
- a heat-shrinkable tube as the water-stop coating, it is possible to improve the working efficiency of the process of arranging the heat-shrink tube on the outer periphery of the region from the water blocking wall to the end of the insulating coating.
- the water stop coating may be an elastic tube having rubber elasticity.
- the elastic tube in a state where the diameter of the elastic tube is expanded, the elastic tube is disposed on the outer periphery of the region extending from the water blocking wall to the end of the insulating coating, and then the elastic tube is restored and deformed. Then, the inner surface of the elastic tube is in close contact with the outer surface of the water blocking wall and the outer surface of the end portion of the insulating coating.
- the elastic tube can be covered from the water blocking wall to the end portion of the insulating coating by a simple process.
- a wire described in Japanese Patent Laid-Open No. 2000-259883 is known as an electric wire with a terminal.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which a core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire. The region from the substrate part to the end of the insulation coating is covered with a heat-shrink tube. ing.
- the substrate portion has a flat plate shape, a gap is easily formed between the one end side of the heat-shrinkable tube and the substrate portion, so that water enters the heat-shrinkable tube from this gap, There is concern about this water coming into contact with the core wire and wire barrel. As a result, there is a possibility that problems such as oxidation of the surface of the core wire or the wire barrel may occur.
- the technology disclosed in the present specification has been completed based on the above circumstances, and its purpose is to prevent water from adhering to the core wire and the wire barrel.
- FIGS. 3A of electric wires with a terminal are comprised from the electric wire 310 and the female terminal 320 (equivalent to a terminal) connected to the terminal of this electric wire 310.
- FIG. 3A of electric wires with a terminal are comprised from the electric wire 310 and the female terminal 320 (equivalent to a terminal) connected to the terminal of this electric wire 310.
- the electric wire 310 includes a core wire 311 formed by twisting a plurality of fine metal wires, and an insulating coating 312 made of a synthetic resin that covers the outer periphery of the core wire 311.
- the core wire 311 is comprised from arbitrary metals as needed, such as copper, a copper alloy, aluminum, and an aluminum alloy. In this embodiment, aluminum or an aluminum alloy is used.
- the terminal of the electric wire 310 the terminal of the core wire 311 is exposed by peeling off the insulation coating 312 for a predetermined length.
- the core wire 311 may be a single core wire.
- the female terminal 320 is formed by pressing a metal plate material into a predetermined shape.
- a metal which comprises the female terminal 320 arbitrary metals, such as copper and a copper alloy, can be employ
- a plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- the female terminal 320 has a structure in which a wire barrel 326 and an insulation barrel 328 are provided via a connecting portion 324 behind a connection cylinder portion 321 (corresponding to a connection portion). is there.
- the connecting cylinder part 321 is connected by inserting a tab of a male terminal (not shown), and has an elastic contact piece 322 inside.
- the connecting portion 324 is formed in a channel type in which the side plate 324B is raised from both side edges of the bottom plate 324A.
- the wire barrel 326 functions to crimp the exposed end of the core wire 311 in the electric wire 310, and a pair of ends from both side edges of the bottom plate 326A extending rearward from the bottom plate 324A of the connecting portion 324 described above.
- the barrel piece 326B is raised.
- the wire barrel 326 is crimped in a so-called heart shape so that the core wire 311 is held from the outside and the protruding edges of both barrel pieces 326B are brought into contact with each other while being bitten into the core wire 311.
- a plurality of concave portions 327 having a parallelogram shape are formed on the inner surface of the bottom plate 326A of the wire barrel 326 so as to be aligned vertically and horizontally.
- the pair of opposing sides is formed in a direction orthogonal to the direction in which the core wire 311 extends, so that the fixing force between the core wire 311 and the wire barrel 326 is improved.
- the contact area between the rim of the recesses 327 and the core wire 311 is increased, and as a result, the electrical resistance value between the female terminal 320 and the core wire 311 is increased. It can be lowered.
- the insulation barrel 328 functions to crimp the end of the insulation coating 312 remaining after the skinning of the electric wire 310, and both sides of the bottom plate 328A extended from the bottom plate 326A of the wire barrel 326 described above. A pair of tall barrel pieces 328B are raised from the edge.
- the insulation barrel 328 is crimped to a so-called overlap type in which the end of the insulating coating 312 is held from the outside while overlapping the protruding ends of the barrel pieces 328B.
- a water blocking wall 330 is formed by molding a synthetic resin material in the middle of the connecting portion 324 in the length direction.
- a thermoplastic resin such as polyamide, polyester, polypropylene and polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 330 is formed so as to be able to surround the outer periphery of the connecting portion 324 over the entire circumference, and has a substantially rectangular thick plate shape with rounded corners when viewed from the front.
- the tip of the concentric wire 311 is placed on the rear surface side of the water blocking wall 330.
- a contact plate 332 (corresponding to the contact portion) that functions to stop the core wire 311 in front is provided.
- the contact plate 332 is formed in a substantially square shape in a front view that fits inside the connecting portion 324, and is integrally formed with the water blocking wall 330 via the connecting portion 334.
- the connecting portion 334 has a mountain shape in plan view and can be deformed flat.
- the contact plate 332 and the connecting portion 334 are formed in a form that rises from the bottom plate 324A of the connecting portion 324 due to the relationship of die cutting when molding.
- the purpose of providing the abutting plate 332 is that when the core wire 311 is crimped to the wire barrel 326 and elongation in the axial direction occurs, the core wire 311 is present if the tip of the core wire 311 before the crimping is in front of the caulking plate 332. It is for positioning so that a pressing force may not act on the rear surface of the water blocking wall 330.
- the tip of the core wire 311 deforms the connecting portion 334 into a flat shape and pushes the contact plate 332,
- the length of the connecting portion 334 that is, the distance away from the rear surface of the water stop wall 330 of the contact plate 332 is set so that the pressing force from the tip of the core wire 311 does not act on the rear surface of the water stop wall 330. Therefore, the distance from the rear surface of the water blocking wall 330 of the contact plate 332 is set in consideration of the maximum expected allowance of the core wire 311 according to the material, the wire diameter, and the crimping force of the core wire 311. It is desirable to do.
- a heat shrinkable tube 340 made of synthetic resin (on the water blocking coating). Equivalent).
- the length dimension of the heat-shrinkable tube 340 is a length dimension that can cover a region extending from the water blocking wall 330 to a position slightly behind the position where the insulation barrel 328 is crimped.
- the heat shrinkable tube 340 of the present embodiment has an adhesive layer or an adhesive layer (not shown) formed on the inner surface thereof. The adhesive layer or the pressure-sensitive adhesive layer is heated and softened or melted to exhibit adhesiveness or tackiness.
- the inner surface on one end side of the heat-shrinkable tube 340 can be in close contact with the outer surface of the water blocking wall 330 without any gap in a state where the heat-shrinkable tube 340 is heated and contracted. Further, the inner surface on the other end side of the heat shrinkable tube 340 is in close contact with the outer peripheral surface of the insulating coating 312 without any gap.
- the heat-shrinkable tube 340 may be one that does not have an adhesive layer or an adhesive layer on its inner surface. In this case, as the synthetic resin material constituting the water blocking wall 330, a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the water blocking wall 330 is formed of such a synthetic resin material
- the water blocking wall 330 in the step of heating the heat shrinkable tube 340, the water blocking wall 330 is softened or melted, and the inner surface of the heat shrinkable tube 340 and the outer surface of the water blocking wall 330 are formed. It can be set as the structure which adhere
- the chain terminal 315 is formed by sequentially passing a metal hoop material through a press machine and performing a punching process, a bending process, and the like.
- the assembled female terminals 320 are connected to one side edge of the carrier 316 with a certain pitch.
- the female terminal 320 has a connecting cylinder portion 321 assembled in a predetermined cylindrical shape and a connecting portion 324 formed in a predetermined channel shape, while the wire barrel 326 and the insulation barrel 328 are opened before crimping. Is in a state.
- the rear edge of the bottom plate 328 ⁇ / b> A of the insulation barrel 328 is connected to one side edge of the carrier 316 via a connecting portion 317.
- the chain terminal 315 is sent to a molding step as indicated by an arrow in the figure.
- the water blocking wall 330 is molded with respect to the connecting portion 324 of the female terminal 320.
- a backing plate 332 is integrally formed on the rear surface side of the water blocking wall 330 via a connecting portion 334. More specifically, in the molding process, a predetermined position in the connecting portion 324 of the female terminal 320 is closed by a pair of upper and lower mold dies, and a synthetic resin material in a molten state is formed inside a cavity formed in both molds. Is injected.
- the connecting portion 334 and the contact plate 332 are placed at predetermined positions of the connecting portion 324 of the female terminal 320 as shown in the lower side of FIG.
- a water blocking wall 330 is formed. Such molding of the water blocking wall 330 is intermittently executed for each of the plurality of female terminals 320.
- the chain terminal 315 by which the water stop wall 330 was molded with respect to each female terminal 320 is manufactured, it will be conveyed to the electric wire crimping
- an electric wire 310 that has been subjected to terminal processing that is, an electric wire 310 in which the insulating coating 312 is peeled off at the end and the end of the core wire 311 is exposed for a predetermined length is prepared.
- An example of the crimping process is as follows. After the female terminal 320 is separated from the carrier 316, the female terminal 320 is set in a crimping die made of an anvil and a crimper (not shown), and placed on the anvil, for example. Thereafter, the exposed core wire 311 at the end of the electric wire 310 and the remaining end of the insulation coating 312 are placed on the bottom plates 326A and 328A of the wire barrel 326 and the insulation barrel 328, respectively. At this time, as shown in FIG. 31, the electric wire 310 is pushed forward, and the pushing is stopped when the tip of the core wire 311 hits the contact plate 332 of the water blocking wall 330, thereby substantially positioning the portion to be pressed. Is done.
- the crimping die is clamped. Specifically, as the crimper approaches toward the anvil, the wire barrel 326 is crimped to the end of the core wire 311 in a heart shape as described above, and the insulation is performed.
- the connection barrel 328 is crimped onto the end of the insulation coating 312 in an overlapping manner.
- the core wire 311 extends along with the crimping of the wire barrel 326, and the leading end pushes the contact plate 332 while deforming the connecting portion 334 flatly.
- the separation distance from the rear surface of the water blocking wall 330 of the backing plate 332 is set in consideration of the maximum allowance of the core wire 311.
- the female terminal 320 may be set in the crimping die while remaining in the chain terminal 315 and may be separated from the carrier 316 simultaneously with the crimping process.
- the covering process is finally performed.
- the heat-shrinkable tube 340 is inserted from the electric wire 310 side or the female terminal 320 side, and is covered from the water blocking wall 330 to the region extending beyond the crimping portion of the insulation barrel 328 in the insulating coating 312. .
- the heat-shrinkable tube 340 can be inserted from the female terminal 320 side relatively easily.
- the heat-shrinkable tube 340 may be inserted into the electric wire 310 in advance before performing the crimping process.
- the heat-shrinkable tube 340 When the heat-shrinkable tube 340 is fitted and then heated by a heating device (not shown), the heat-shrinkable tube 340 contracts, and as shown in FIG. 26, the inner surface of the heat-shrinkable tube 340 is connected to the outer surface of the water blocking wall 330 and It adheres to the outer surface of the insulating coating 312 without any gap. Thus, the manufacture of the terminal-attached electric wire 3A is completed.
- the connecting cylinder portion 321 when the connecting cylinder portion 321 is heated in a vertically oriented posture, the synthetic resin material constituting the water blocking wall 330 is connected even if the water blocking wall 330 melts unexpectedly. Inflow into the cylindrical portion 321 is avoided. As a result, the reliability of electrical connection with the mating male terminal in the connection tube portion 321 is improved.
- the connecting portion 324 that connects the connecting cylinder portion 321 and the wire barrel 326 is provided with a water blocking wall 330 by molding of a synthetic resin material, so that water can be prevented from entering along the outer surface of the connecting portion 324. Is done. Further, since the inner surface of the open end of the heat shrinkable tube 340 is in close contact with the outer surface of the water blocking wall 330, water can be prevented from entering between the water blocking wall 330 and the heat shrinkable tube 340. Thereby, the area
- a contact plate 332 that contacts the tip of the core wire 311 before crimping is integrally formed on the rear surface of the water blocking wall 330 via a connecting portion 334 that can be elastically deformed.
- the tip of the core wire 311 is allowed to move forward along with the elastic deformation of the 334, and the distance of the contact plate 332 from the rear surface of the water blocking wall 330 is determined by the tip of the core wire 311.
- the tip of the core wire 311 is set to a distance that does not cause the pressing force to act on the rear surface of the water blocking wall 330.
- the end of the core wire 311 when the end of the core wire 311 is set on the wire barrel 326 to be crimped, the end of the core wire 311 is pressed against the wire barrel 326 and extended if the front end of the core wire 311 is brought into contact with the abutting plate 332 and stopped.
- the tip of the core wire 311 elastically contracts the connecting portion 334 and approaches the water blocking wall 330 while pushing the contact plate 332, the tip of the core wire 311 acts on the water blocking wall 330 with a pressing force. I will not let you. Therefore, the water stop wall 330 is not damaged at the tip of the core wire 311, and the tip of the core wire 311 does not run on the outer surface of the water stop wall 330.
- the open end of the heat-shrinkable tube 340 can be securely adhered to the outer surface of the water blocking wall 330, and the waterproof function by the heat-shrinkable tube 340 is more reliably exhibited. be able to.
- the metal constituting the core wire 311 and the metal constituting the female terminal 320 are different, if water adheres to both the core wire 311 and the wire barrel 326, electrolytic corrosion occurs in the core wire 311 or the wire barrel 326. However, since the core wire 311 and the wire barrel 326 are surely waterproofed by the heat shrinkable tube 340, the core wire 311 or the wire barrel 326 is prevented from being melted by electrolytic corrosion.
- the core wire 311 is made of aluminum or an aluminum alloy and the female terminal 320 is formed by forming a tin plating layer on the surface of copper or copper alloy, it is made of aluminum or aluminum alloy having a relatively large ionization tendency. This is particularly effective because the core wire 311 may be dissolved by electrolytic corrosion. In addition, since the specific gravity of aluminum or aluminum alloy is relatively small, the electric wire 310 can be reduced in weight.
- the heat shrinkable tube 340 is used as the water blocking coating.
- the inner diameter of the heat shrinkable tube 340 is relatively large, it can be easily fitted in a region from the water blocking wall 330 to the end of the insulating coating 312. Thereafter, the inner surface of the heat-shrinkable tube 340 can be brought into close contact with the water blocking wall 330 and the terminal of the insulating coating 312 by shrinking by heating.
- the heat-shrinkable tube 340 as the water blocking coating, it is possible to improve the work efficiency of the process of disposing the water blocking coating on the outer periphery of the region extending from the water blocking wall 330 to the terminal of the insulating coating 312.
- the adhesive layer or the adhesive layer is formed on the inner peripheral surface of the heat shrinkable tube 340, the inner surface of the heat shrinkable tube 340 and the region extending from the water blocking wall 330 to the terminal of the insulating coating 312 are closely attached. Can do.
- Embodiment 3-2 of the present invention will be described with reference to FIGS.
- the embodiment 3-2, the rear side of the cut-off wall 330 of the connecting portion 324 are molded of the female terminal 320, make changes to the structure of the portion providing the abutting portion against the distal end of the core wire 311 before crimping Is.
- the changed part will be mainly described, and the same parts as those in Embodiment 3-1 are denoted by the same reference numerals, and the description will be omitted or simplified.
- a peripheral wall 335 having a channel shape in a front view with an upper surface opened is formed on the rear surface of the water blocking wall 330.
- the peripheral wall 335 sandwiches both the inner and outer surfaces of the side plate 324B of the connecting portion 324 and is in close contact with only the outer surface side of the bottom plate 324A.
- a thin film 336 is formed in an opening on the rear end side in the connecting portion 324 in the peripheral wall 335. More specifically, the left and right side edges of the thin film 336 are connected to the inner surface of the peripheral wall 335, and the lower edge is in contact with the bottom plate 324A of the connecting part 324.
- the thin film 336 corresponds to the contact portion.
- the thin film 336 allows the tip of the core wire 311 to enter the peripheral wall 335 due to its own damage. For example, when the core wire 311 is crimped and stretched while the tip is in contact with the thin film 336, the tip of the core wire 311 is pushed into the peripheral wall 335 while breaking the thin film 336.
- the protruding length of the peripheral wall 335 that is, the distance away from the rear surface of the water stop wall 330 of the thin film 336 is set so that the tip of the water stays in front of the rear surface of the water stop wall 330.
- the tip of the core wire 311 of the electric wire 310 breaks through the thin film 336 and enters the peripheral wall 335, but the tip of the core wire 311 is inserted into the water blocking wall 330, as shown in FIG. never reach the back. Therefore, the water stop wall 330 is not damaged at the tip of the core wire 311, and the tip of the core wire 311 does not run on the outer surface of the water stop wall 330.
- the opening end of the heat shrinkable tube can be securely adhered to the outer surface of the water blocking wall 330, and the waterproof function by the heat shrinkable tube 340 is achieved. Can be exhibited more reliably.
- Embodiment 3-3 36 to 38 show Embodiment 3-3 of the present invention.
- this embodiment 3-3 another change is made to the structure of the portion where the abutting portion for abutting the tip of the core wire 311 before crimping is provided on the rear surface side of the water blocking wall 330 molded to the connecting portion 324 of the female terminal 320. It is added. Similarly, the changed part will be mainly described.
- a peripheral wall 335 having a channel shape in a front view with an upper surface opened is formed on the rear surface of the water blocking wall 330.
- the peripheral wall 335 sandwiches both the inner and outer surfaces of the side plate 324B of the connecting portion 324 and is in close contact with only the outer surface side of the bottom plate 324A.
- a protrusion 338 having a mountain-shaped cross section is formed along the inner periphery of the opening on the rear end side in the connecting portion 324 in the peripheral wall 335. More specifically, the left and right vertical portions of the protrusion 338 are connected to the inner surface of the peripheral wall 335, and the horizontal portion runs on the bottom plate 324 ⁇ / b> A of the connecting portion 324. This protrusion 338 corresponds to the contact portion.
- the protrusion 338 allows the tip of the core wire 311 to enter the peripheral wall 335 by being torn. For example, when the core wire 311 is crimped in a state where the tip is in contact with the ridge 338 and elongation occurs, the tip of the core wire 311 is pushed into the peripheral wall 335 while tearing the ridge 338.
- the protruding length of the peripheral wall 335 that is, the distance away from the rear surface of the water stop wall 330 of the ridge 338 is set so that the tip of the core wire 311 stays in front of the rear surface of the water stop wall 330.
- the open end of the heat-shrinkable tube 340 can be securely adhered to the outer surface of the water blocking wall 330.
- the waterproof function by the heat shrinkable tube 340 can be exhibited more reliably.
- the present invention is not limited to the embodiments described with reference to the above description and drawings.
- the following embodiments are also included in the technical scope of the present invention.
- (1) The form of the abutting part that abuts the tip of the core wire 311 before crimping disposed on the rear surface side of the water blocking wall 330 is not limited to that illustrated in the above embodiment, and in essence, the displacement or deficiency of the abutting part.
- the leading end of the core wire 311 is allowed to move forward, and the separation distance from the rear surface of the water blocking wall 330 of the abutting portion extends from the state where the leading end of the core wire 311 hits the abutting portion.
- other forms may be used. .
- the distance of the contact portion from the rear surface of the water blocking wall 330 is such that when the core wire 311 extends from the state where the tip of the core wire 311 hits the contact portion, the tip of the core wire 311 is strictly the water blocking wall. Even if the pressing force is not applied to the rear surface of 330 or the distance does not reach the rear surface of the water blocking wall 330, the water blocking wall 330 is damaged or the tip of the core wire 311 does not ride on the outer surface of the water blocking wall 330.
- the distance may be such that the tip of the core wire 311 applies a slight pressing force to the rear surface of the water blocking wall 330 or lightly hits the rear surface of the water blocking wall 330.
- connection part 324 of the female terminal 320 it is not necessary to form so that the outer side of the connection part 324 may be surrounded over the perimeter as illustrated in the said embodiment. , It may be provided so as to fill at least the groove of the connecting portion 324.
- the inner surface of the heat-shrinkable tube 340 and the exposed outer surface of the connecting portion 324 are not completely adhered, but even if water enters from the outer surface side of the connecting portion 324, the core wire 311 and the wire Since the contact portion with the barrel 326 is not easily reached, it is possible to avoid the occurrence of electrolytic corrosion.
- the amount of the synthetic resin material that is the material of the water blocking wall 330 can be reduced, it is possible to contribute to a reduction in manufacturing cost.
- an elastic tube having rubber elasticity may be used instead of the heat shrinkable tube 340 exemplified in the above embodiment.
- an elastic tube when the elastic tube is fitted on the outer periphery of the region extending from the water blocking wall 330 to the end of the insulating coating 312 in the expanded state and then the elastic tube is restored and deformed, the inner surface of the elastic tube becomes the water blocking wall. 330 and the end of the insulating coating 312 are in close contact.
- the elastic tube that is, the water blocking coating, can be applied to the region extending from the water blocking wall 330 to the end of the insulating coating 312.
- the core wire 311 is made of aluminum or an aluminum alloy.
- the present invention is not limited to this, and the core wire 311 may be made of copper or a copper alloy, and formed of any metal as necessary. It is good also as a structure to be made.
- the female terminal 320 is made of copper or a copper alloy and a tin plating layer is formed on the surface.
- the present invention is not limited to this, and the female terminal may be made of any metal as necessary.
- the female terminal 320 is exemplified as the terminal, but in addition to that, the male terminal provided with a male tab in the connecting portion, the LA terminal in which the connecting portion forms a centerpiece, and further, the connecting portion includes:
- splice terminals that are wire barrels for crimping core wires of other electric wires
- the terminals are wires that are crimped to the connection portions connected to the conductive members and the ends of the core wires exposed from the ends of the insulation coating
- the present invention can be applied to all barrels configured to include a barrel and a connecting portion that connects the wire barrel and the connecting portion.
- the technology disclosed in this specification is a terminal-attached electric wire in which a terminal is connected to an end of an electric wire whose outer periphery of a core wire is covered with an insulating coating, and the terminal is connected to a conductive member; and A wire barrel that is crimped to the end of the core wire exposed from the end of the insulating coating, and a connecting portion that connects the wire barrel and the connecting portion are configured, and a synthetic resin material is molded into the connecting portion.
- a water blocking wall formed is provided, and is in close contact with the outer surface of the water blocking wall and the outer surface of the terminal of the insulating coating to cover the core wire between the water blocking wall and the terminal of the insulating coating.
- a tubular water blocking coating is provided, and the water blocking wall is provided with a tip of the core wire before crimping at a position spaced rearward from a rear surface that is a surface facing the tip of the core wire in the water blocking wall.
- the hitting part is provided integrally, and this hitting part is The leading end of the core wire is allowed to move forward with displacement or deficiency of the abutting portion, and the distance of the abutting portion from the rear surface of the water blocking wall is such that the leading end of the core wire hits the abutting portion.
- the technology disclosed in the present specification is a terminal connected to the end of an electric wire whose outer periphery is covered with an insulating coating, and is exposed from a connection portion connected to a conductive member and the terminal of the insulating coating.
- a wire barrel that is crimped to the end of the core wire and a connecting portion that connects the wire barrel and the connecting portion are configured, and a water blocking wall formed by molding a synthetic resin material is formed in the connecting portion.
- a cylindrical water-stop coating can be attached so as to cover the core wire between the water-stop wall and the end of the insulating coating.
- the water blocking wall is integrally provided with a contact portion that contacts the tip of the core wire before crimping at a position spaced rearward from a rear surface that is a surface facing the tip of the core wire in the water blocking wall.
- This pad is The leading end of the core wire is allowed to move forward with a displacement or deficiency of the abutment, and the distance from the rear surface of the water blocking wall of the abutting portion is such that the leading end of the core wire hits the abutting portion. It is characterized in that when the core wire is extended, the distance between the front end of the core wire and the rear surface of the water blocking wall is not set to the pressing force or the rear surface of the water blocking wall is not reached.
- the water stop wall is provided in the joint portion connecting the connection portion and the wire barrel by molding the synthetic resin material. Is prevented from entering. Moreover, since the opening end of the water blocking coating is in close contact with the outer surface of the water blocking wall, water can be prevented from entering between the water blocking wall and the water blocking coating. Thereby, the area
- the core wire tends to extend in the axial direction, and depending on conditions such as the material of the core wire, the core wire diameter, and the crimping force, etc. It is done. Therefore, when setting the end of the core wire to the bottom of the wire barrel to be crimped, if it is set in a state where it protrudes too far and approaches the water blocking wall, There is a possibility that the tip of the wire may damage the water blocking wall, or the tip of the core wire may ride on the outer surface of the water blocking wall. Then, when the waterproof coating is attached, the open end of the waterproof coating cannot be securely adhered to the outer surface of the waterproof wall, and there is a risk of intrusion of water.
- a contact portion is integrally provided on the rear surface side of the water blocking wall so as to be spaced apart from the rear surface by a predetermined distance.
- the abutment portion is configured to allow the tip end of the core wire to move forward with displacement or deficiency of the abutment portion, and the spacing of the abutment portion is such that the tip end of the core wire hits the abutment portion.
- the tip of the core wire when setting the end of the core wire to be crimped to the wire barrel, set it so that the tip of the core wire is in contact with the contact portion as much as possible.
- the tip of the core wire When the end of the core wire is crimped and stretched, the tip of the core wire approaches the water stop wall with the displacement or breakage of the contact portion, but the separation distance from the water stop wall of the contact portion is set to a predetermined value as described above Therefore, the tip of the core wire does not exert a pressing force on the rear surface of the water blocking wall or does not reach the rear surface of the water blocking wall. Riding on the outer surface of the wall is avoided.
- the waterproof coating when the waterproof coating is attached, the opening end of the waterproof coating can be securely adhered to the outer surface of the waterproof wall, and the waterproof function by the waterproof coating can be more reliably exhibited. .
- the abutting portion is a abutting plate provided at a distal end of a connecting portion projecting from the rear surface of the water blocking wall so as to be able to be elastically compressed.
- the leading end of the core wire is allowed to move forward with displacement, and the distance from the rear surface of the water blocking wall of the pad plate is such that the tip of the core wire hits the pad plate.
- the tip of the core wire is set to a distance that does not exert a pressing force on the rear surface of the water blocking wall.
- the abutting portion is a thin film stretched on a projecting end of a peripheral wall projecting from a peripheral edge of the rear surface of the water blocking wall, and the thin film has a tip of the core wire with a defect of the thin film.
- the core wire When the core wire is allowed to enter the peripheral wall and the distance from the rear surface of the water blocking wall of the thin film extends from the state where the tip of the core wire hits the thin film, the core wire The tip is set to a distance that does not reach the rear surface of the water blocking wall.
- the front end of the core wire is stopped by being applied to the thin film.
- the tip of the core wire breaks the thin film and approaches the water blocking wall while entering the peripheral wall, but does not reach the water blocking wall.
- the abutting portion is a ridge formed along the circumferential direction on the inner surface of the peripheral wall protruding from the peripheral edge of the rear surface of the water blocking wall, and the ridge is accompanied by a defect of the ridge.
- the leading end of the core wire is allowed to enter the peripheral wall, and the distance from the rear surface of the water blocking wall of the ridge is determined from the state where the tip of the core wire hits the ridge. Is set at such a distance that the tip of the core wire does not reach the rear surface of the water blocking wall.
- the water blocking wall is formed so as to surround the outer periphery of the connecting portion over the entire periphery. Since the water blocking wall can be in close contact with the inner surface of the opening end of the water blocking coating over the entire circumference, the waterproof property can be further improved.
- the electric wire with terminal may have the following configuration. (5) The metal constituting the core wire is different from the metal constituting the terminal.
- the core wire is made of aluminum or an aluminum alloy.
- Aluminum or aluminum alloy has a relatively small specific gravity, so the weight of the electric wire can be reduced. On the other hand, since aluminum or aluminum alloy has a relatively high ionization tendency, it easily dissolves when electrolytic corrosion occurs. According to the said structure, since a core wire and a wire barrel are reliably waterproofed by a water stop coating, it is especially effective when a core wire consists of aluminum or aluminum alloy.
- An adhesive layer or an adhesive layer is formed on the inner peripheral surface of the water blocking coating.
- the inner surface of the water blocking coating and the region extending from the water blocking wall to the terminal of the insulating coating can be closely adhered.
- the water blocking coating is a heat shrinkable tube.
- the inner diameter of the heat shrinkable tube is relatively large, it can be easily fitted in the region from the water blocking wall to the end of the insulation coating. Thereafter, the inner surface of the heat-shrinkable tube can be brought into close contact with the water blocking wall and the terminal of the insulating coating by being shrunk by heating.
- a heat-shrinkable tube as the water-stop coating, it is possible to improve the work efficiency of the process of disposing the water-stop coating on the outer periphery of the region extending from the water-stop wall to the end of the insulation coating.
- the water stop coating is an elastic tube having rubber elasticity.
- the elastic tube when the elastic tube is fitted to the outer periphery of the region extending from the water blocking wall to the end of the insulation coating in the expanded state, and then the elastic tube is restored and deformed, the inner surface of the elastic tube Adheres closely to the end of the coating.
- the elastic tube that is, the water blocking coating
- the elastic tube can be applied to the region from the water blocking wall to the end of the insulating coating.
- a wire described in Japanese Patent Application Laid-Open No. 2000-259883 is known as an electric wire with a terminal.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which the core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire.
- a region from the substrate part to the end of the insulating coating is covered with a heat shrinkable tube.
- One end of the heat-shrinkable tube covers a core wire crimped by a wire barrel and the other end is in close contact with the insulating coating.
- the substrate portion has a flat plate shape, there is a concern that a gap is formed between one end side of the heat shrinkable tube and the substrate portion. Then, there is a concern that water enters the heat-shrinkable tube from this gap and this water comes into contact with the core wire and the wire barrel. Then, we are anxious about generating troubles, such as the surface of a core wire or a wire barrel being oxidized.
- the technology disclosed in the present specification has been completed based on the above circumstances, and an object thereof is to provide a terminal-attached electric wire and a terminal excellent in waterproofness.
- the terminal-attached electric wire 410 according to Embodiment 4-1 of the present invention will be described with reference to FIGS.
- the electric wire with terminal 410 according to the present embodiment includes an electric wire 411 and a female terminal 412 (an example of the terminal 12) connected to the terminal of the electric wire 411.
- the electric wire 411 includes one core wire 413 formed by twisting a plurality of fine metal wires, and an insulating coating 414 made of synthetic resin that covers the outer periphery of the core wire 413.
- the core wire 413 is comprised from arbitrary metals as needed, such as copper, a copper alloy, aluminum, an aluminum alloy. In this embodiment, aluminum or an aluminum alloy is used.
- the core wire 413 is exposed by peeling off the insulating coating 414.
- the core wire 413 may be a single core wire.
- the female terminal 412 is formed by pressing a metal plate material into a predetermined shape.
- a metal constituting the female terminal 412 any metal such as copper or copper alloy can be adopted as necessary.
- a plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- the female terminal 412 has a bottom plate 415 on which the insulation coating 414 of the electric wire 411 and the core wire 413 are placed.
- a pair of insulation barrels 416 protrude from the side edge of the bottom plate 415.
- the insulation barrel 416 is pressure-bonded to the insulation coating 414 so as to hold the insulation coating 414 from the outside in a state where the insulation coating 414 and the core wire 413 of the electric wire 411 are placed on the bottom plate 415.
- the bottom plate 415 is formed with a pair of wire barrels 417 protruding from the side edges of the bottom plate 415 at positions closer to the end of the core wire 413 than the insulation barrel 416.
- the wire barrel 417 is crimped to the core wire 413 so as to be held from the outside of the core wire 413 in a state where the insulating coating 414 and the core wire 413 of the electric wire 411 are placed on the bottom plate 415.
- a plurality of recesses 418 are formed in the area corresponding to the wire barrel 417 in the bottom plate 415 and in the wire barrel 417 on the surface on which the core wire 413 is placed.
- the concave portion 418 has a substantially square shape, and specifically has a substantially parallelogram shape.
- the concave portion 418 includes a pair of first sides that are substantially orthogonal to the direction in which the core wire 413 extends (the horizontal direction in FIG. 42), and a pair of second sides that intersect the direction in which the core wire 413 extends at an angle smaller than 90 °. .
- the adjacent recesses 418 are arranged such that the first sides are arranged in a straight line, and the second sides are arranged in a straight line.
- die (not shown) used when pressing the recessed part 418 can be formed by forming a some groove
- the first sides of the recesses 418 adjacent to each other in the direction in which the core wire 413 extends are arranged so as to overlap in the direction in which the core wire 413 extends, so that the fixing force between the core wire 413 and the wire barrel 417 can be improved. it can.
- the contact area between the rims of the recesses 418 and the core wire 413 increases, and as a result, the electrical resistance value between the female terminal 412 and the core wire 413 is lowered. be able to.
- the bottom plate 415 is formed with an extending portion 419 that further extends in the extending direction of the core wire 413 and is bent into a concave shape on the surface on which the core wire 413 is placed.
- the extending portion 419 has a substantially U-shaped cross section and opens upward.
- the cross-sectional shape of the extension part 419 may be, for example, a semicircular shape, or the extension part 419 may be a flat plate shape, and may have an arbitrary shape as necessary.
- square-shaped convex portions 419A are formed so as to protrude from both ends 419F and 419F in the width direction (vertical direction in FIG. 42) of the extending portion 419.
- Each convex portion 419A, 419A is bent in the inner direction (the central axis direction of the terminal 412).
- the extending portion 419 is formed with a connecting cylinder portion 420 that further extends in the direction in which the core wire 413 extends to form a cylindrical shape and connect to a mating terminal (not shown).
- An elastic contact piece 421 that elastically contacts the mating terminal is provided in the connecting tube portion 420.
- the extension portion 419 is provided with a water blocking wall 422 by molding a synthetic resin material.
- a synthetic resin material for forming the water blocking wall 422 a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and multiple types of synthetic resin materials may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 422 is formed so as to surround the entire outer periphery of the extending portion 419, and the convex portions 419A, 419A formed at both end portions 419F, 419F of the extending portion 419 are inward. In the bent state, it is accommodated inside the water blocking wall 422.
- the extension portion 419 is filled with a synthetic resin material that forms the water blocking wall 422.
- the cross-section of the water blocking wall 422 has a substantially square shape with rounded corners.
- a resin ring 423 made of synthetic resin is fitted on the end of the electric wire 411. Specifically, a resin ring 423 having a circular cross-sectional shape is provided at the end of the insulating coating 414 at a position behind the portion where the insulation barrel 416 is crimped (in the direction opposite to the exposed core wire 413). It is fitted.
- the inner diameter of the resin ring 423 is set to be substantially the same as the outer diameter of the insulating coating 414. Thereby, the resin ring 423 can be easily fitted on the end of the electric wire 411.
- substantially the same means that the inner diameter of the resin ring 423 is the same as the outer diameter of the insulating coating 414, the inner diameter of the resin ring 423 is slightly larger than the outer diameter of the insulating coating 414, and the inner diameter of the resin ring 423 is insulated. And a case slightly smaller than the outer shape of the coating 414.
- thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- Water-stop coating 425) From the portion where the water blocking wall 422 is formed in the extended portion 419 to the portion where the wire barrel 417, the insulation barrel 416, and the resin ring 423 are externally fitted, and further beyond the resin ring 423 to the insulating coating 414. This region is covered with a water-stop coating 425 made of a synthetic resin material.
- the water blocking coating 425 includes a heat shrinkable tube 424.
- an adhesive layer or an adhesive layer (not shown) is formed on the inner surface of the heat shrinkable tube 424. The adhesive layer or the pressure-sensitive adhesive layer is heated or softened or melted to express adhesiveness or tackiness.
- the length dimension of the heat-shrinkable tube 424 is set to be longer than the length dimension of the region from the water blocking wall 422 to the resin ring 423.
- the inner surface of the heat shrinkable tube 424 is in close contact with the outer peripheral surface of the water blocking wall 422 without any gap in the state where the heat shrinkable tube 424 is heated and contracted. Further, the inner surface of the heat shrinkable tube 424 is in close contact with the outer peripheral surface of the resin ring 423 without any gap.
- the synthetic resin material constituting the water blocking wall 422 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the water blocking wall 422 in the process of heating the heat shrinkable tube 424, the water blocking wall 422 can be softened or melted, and the inner surface of the heat shrinkable tube 424 and the water blocking wall 422 can be bonded.
- the synthetic resin material constituting the resin ring 423 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the resin ring 423 in the step of heating the heat-shrinkable tube 424, the resin ring 423 can be softened or melted to bond the inner surface of the heat-shrinkable tube 424 and the resin ring 423.
- the resin ring 423 and the outer peripheral surface of the insulating coating 414 can be bonded by forming the resin ring 423 from the synthetic resin material as described above.
- a carrier 426 having a strip shape and a plurality of terminal pieces 427 connected to the side edges of the carrier 426 are formed.
- the carrier 426 is formed with feed holes 428 arranged at substantially equal intervals along the longitudinal direction.
- a feed claw (not shown) provided in the processing machine is engaged with the feed hole 428.
- a plurality of terminal pieces 427 are connected to the carrier 426 so as to be arranged at substantially equal intervals along the longitudinal direction.
- the terminal piece 427 includes a bottom plate 415 on which the insulating coating 414 and the core wire 413 of the electric wire 411 are placed, an insulation barrel 416 that protrudes from the bottom plate 415 and is crimped to the insulating coating 414, and protrudes from the bottom plate 415 to the core wire 413 A wire barrel 417 to be crimped.
- a plurality of recesses 418 may be formed on the surface of the wire barrel 417 on which the core wire 413 is placed. Moreover, you may form said recessed part 418 in a process different from a punching process.
- a bending process is performed with respect to the metal plate material in which the punching process was performed.
- the core wire 413 is formed so as to extend in the direction in which the core wire 413 extends in a state where the core wire 413 is placed on the bottom plate 415, and the surface on which the core wire 413 is placed extends in a concave shape.
- a portion 419 and a connecting tube portion 420 formed to extend in a direction corresponding to the direction in which the core wire 413 extends from the extending portion 419 are formed (see FIG. 42).
- the projecting portions 419A and 419A protruding from both end portions 419F and 419F in the width direction of the extending portion 419 are bent inwardly (in the direction of the central axis of the terminal piece 427), respectively, and the extending portion 20 Is formed in a box shape.
- the synthetic resin material is molded on the extending portion 419 of the terminal piece 427 while sequentially feeding the terminal pieces 427. More specifically, first, a portion of the extended portion 419 where the water blocking wall 422 is to be formed is sandwiched by a pair of molds (not shown). Next, a molten synthetic resin material is injected into the cavity formed in the mold. After the synthetic resin material is solidified in the mold, the pair of molds are opened, and the terminal piece 427 on which the water blocking wall 422 is formed is detached from the mold. The above process is continuously executed on the plurality of terminal pieces 427 connected to the carrier 426 at substantially constant intervals (see FIG. 43).
- the insulation coating 414 of the electric wire 411 is peeled to expose the core wire 413.
- the resin ring 423 is fitted on the end portion of the insulating coating 414.
- the resin ring 423 is externally fitted to a portion of the insulating coating 414 that is different from the region to which the wire barrel 417 is crimped (portion located on the side opposite to the core wire 413).
- a crimping process is performed on the terminal piece 427. More specifically, the core wire 413 and the insulation coating 414 exposed from the electric wire 411 are placed on the bottom plate 415 of the terminal piece 427. Thereafter, the insulation barrel 416 and the wire barrel 417 are bent by a mold (not shown) so as to be held from the outside of the insulating coating 414 and the core wire 413, respectively. Thereby, the insulation barrel 416 is crimped to the insulating coating 414 and the wire barrel 417 is crimped to the core wire 413.
- a cutting step for cutting the carrier 426 and the terminal piece 427 is performed simultaneously with the above-described crimping step. As a result, each terminal piece 427 is cut from the carrier 426 to become the female terminal 412, and the electric wire with terminal 410 in a state of being connected to the electric wire 411.
- the heat-shrinkable tube 424 is inserted from the electric wire 411 side or the female terminal 412 side, and is arranged in a region from the water blocking wall 422 to the insulating coating 414 beyond the resin ring 423.
- the inner diameter of the heat-shrinkable tube 424 can be inserted from the female terminal 412 side relatively easily by setting the inner diameter of the heat-shrinkable tube 424 to be larger than the outer shape of the connecting tube portion 420 in the state before heating.
- the heat-shrinkable tube 424 may be inserted through the electric wire 411 in advance before performing the crimping process.
- the heat-shrinkable tube 424 is contracted by executing a heating process of heating with a heating device (not shown). Thereby, the inner surface of the heat shrinkable tube 424 is brought into close contact with the water blocking wall 422 and the resin ring 423 without any gap.
- the electric wire 410 with a terminal is completed by the above.
- the extension part 419 is provided with the water blocking wall 422, it is possible to prevent water from entering the extension part 419 and water from adhering to the core wire 413 and the wire barrel 417. . Furthermore, since the outer peripheral surface of the water blocking wall 422 is in close contact with the inner surface of the heat shrinkable tube 424 without any gap, water can enter from between the water blocking wall 422 and the heat shrinkable tube 424. Is also suppressed.
- the insulating coating 414 extends beyond the portion where the water blocking wall 422 is provided in the extended portion 419, the portion where the wire barrel 417, the insulation barrel 416 and the resin ring 423 are externally fitted, and further beyond the resin ring 423. Since the region up to is stopped by the heat-shrinkable tube 424, it is possible to reliably suppress water from adhering to the core wire 413 and the wire barrel 417.
- the resin ring 423 is fitted on the end portion of the insulating coating 414, and the inner surface of the heat shrinkable tube 424 is in close contact with the resin ring 423 without any gap.
- the water blocking wall 422 and the heat shrinkable tube 424 are provided, the intrusion of water from the extending portion 419 is suppressed, but the connecting cylinder of the extending portion 419 is used. Water may permeate from the gap between the end portion 419S on the portion 420 side (the end portion opposite to the wire barrel 417 side) and the water blocking wall 422, and the water may adhere to the extending portion 419. .
- the female terminal 412 of the present embodiment is manufactured through a punching process in which a plated metal plate material is punched into a predetermined shape, the end surface is not plated, and is oxidized (excessed from other portions). Corrosion) is easy to progress. Therefore, when water that has entered from the gap between the extension portion 419 and the water blocking wall 422 adheres to the extension portion 419, corrosion occurs along the end surface 419C of the extension portion 419 as indicated by the arrow X in FIG. proceed.
- the convex portion 419A is formed at the end portion 419D in the width direction of the extending portion 419, the length of the end surface of the extending portion 419 is longer than that of the configuration without the convex portion 419A. Is longer by the outer peripheral edge of the convex portion 419A. As a result, according to the present embodiment, the corrosion path becomes long, so that the corrosion reaches the wire barrel 417 can be delayed.
- the convex portions 419A and 419A are formed at both ends 419D and 419D in the width direction of the extending portion 419, respectively, so that the corrosion path at both end portions 419D and 419D of the extending portion 419. Can be lengthened, and the strength of the extending portion 419 can be increased.
- the core wire 413 is made of aluminum or an aluminum alloy and the female terminal 412 is formed by forming a tin plating layer on the surface of copper or a copper alloy, aluminum or aluminum having a relatively large ionization tendency This is particularly effective because the core wire 413 made of an aluminum alloy may be dissolved by electrolytic corrosion. Since aluminum or aluminum alloy has a relatively small specific gravity, the electric wire 411 can be reduced in weight.
- the water stop coating 425 includes the heat shrinkable tube 424.
- the inner diameter of the heat-shrinkable tube 424 is relatively large, so that it can be easily arranged on the outer periphery of the region.
- the inner surface of the heat shrinkable tube 424 can be brought into close contact with the end portions of the water blocking wall 422 and the insulating coating 414.
- the heat shrinkable tube 424 as the water blocking coating 425, the work efficiency of the process of arranging the heat shrinkable tube 424 on the outer periphery of the region extending from the water blocking wall 422 to the end of the insulating coating 414 is improved. Can do.
- an adhesive layer or an adhesive layer is formed on the inner peripheral surface of the heat shrinkable tube 424, by performing a heating process for shrinking the heat shrinkable tube 424, the inner surface of the heat shrinkable tube 424 is fixed to the inner surface of the heat shrinkable tube 424.
- the water wall 422 can be securely adhered without a gap, and the heat-shrinkable tube 424 and the end portion of the insulating coating 414 can be reliably adhered without a gap.
- the heat shrinkable tube 424 in which the adhesive layer or the adhesive layer is formed on the inner peripheral surface as the water blocking coating 425, the heat shrinking is performed on the outer periphery of the region extending from the water blocking wall 422 to the end of the insulating coating 414.
- the working efficiency of the step of arranging the tube 424 can be improved, and the adhesion between the heat shrinkable tube 424 and the end portions of the water blocking wall 422 and the insulating coating 414 can be improved.
- Embodiment 4-2 of the present invention will be described with reference to FIGS. 44 to 49.
- the water blocking wall 422 is formed so as to surround the outer periphery of the extending portion 419 over the entire periphery, and both end portions 419D, 419D,
- the convex portions 419A and 419A formed on 419D are accommodated inside the water blocking wall 422 while being bent inward.
- square holes 419B and 419B are formed in the respective convex portions 419A and 419A.
- the length of the end surface of the extending portion 419 is larger than that of the configuration without the projecting portion 419A as in the embodiment 4-1. Is longer by the outer peripheral edge of the convex portion 419A. Therefore, the corrosion path (arrow Y in FIG. 45) also becomes longer according to this embodiment, so that the corrosion reaches the wire barrel 417 can be delayed.
- the corrosion of the terminal 412 proceeds along the end face and also proceeds in the internal direction.
- the progress of corrosion in the present embodiment (the extended portion 419 including the convex portion 419A in which the hole 419B is formed) and the corrosion in the extended portion 419 including the convex portion 419A in which the hole 419B is not formed.
- the progress will be described with reference to FIGS. 48 and 49.
- F1, F2 and F3 in FIG. 48 and FIG. 49 are lines indicating the range of corrosion, and the range of corrosion when the same time elapses is indicated by the same symbol in each figure.
- Embodiment 4-3 of the present invention will be described with reference to FIG. 50 and FIG.
- This embodiment is different from Embodiment 4-1 in that convex portions 419A and concave portions 419F are alternately formed at both ends 419D and 419D in the width direction of the extending portion 419. Since the configuration other than the above is substantially the same as that of Embodiment 4-1, the same members are denoted by the same reference numerals, and redundant description is omitted.
- convex portions 419A and concave portions 419F are alternately formed at both ends 419D and 419D in the width direction of the extending portion 419, respectively.
- the recessed portions 419F are respectively formed (three in total) between the four convex portions 419A.
- the protruding portions 419A and the recessed portions 419F are alternately formed at both ends 419D and 419D in the width direction of the extending portion 419, the length of the end surface of the extending portion 419 is increased. However, it is longer by the outer peripheral edge of the convex portion 419A and the concave portion 419F than the configuration without the convex portion 419A and the concave portion 419F. As a result, according to the present embodiment, the corrosion path (arrow line Z in FIG. 50) becomes long, so that the corrosion reaches the wire barrel 417 can be delayed.
- the terminal is the female terminal 412, but is not limited thereto, and is a male terminal provided with a male tab that is further extended in the direction in which the core wire 413 extends from the extending portion 419.
- It may be a so-called LA terminal in which a disk-like connection portion is formed continuously with the extension portion 419, and a through hole is formed in the connection portion, or the extension portion 419.
- It may be a splice terminal in which a plurality of electric wires 411 are connected to another wire barrel 417 further formed in a row, and may be a terminal having an arbitrary shape as necessary.
- the cross-section of the water blocking wall 422 has a substantially square shape, but is not limited thereto, and may be a circular shape, an elliptical shape, an oval shape, or the like.
- the polygonal shape may be sufficient, and it can be made into arbitrary shapes as needed.
- the water-stop coating 425 may have a configuration in which a sheet-shaped water-stop tape is wound around a region extending from the water-stop wall 422 to the end of the insulating coating 414.
- the water blocking wall 422 is formed before the step of crimping the wire barrel 417 to the core wire 413.
- the water blocking wall 422 is not limited to this, and the water blocking wall 422 is wired to the core wire 413.
- the barrel 417 may be formed after being pressure-bonded.
- the core wire 413 is made of aluminum or an aluminum alloy.
- the present invention is not limited to this, and the core wire 413 may be made of copper or a copper alloy. It is good also as a structure formed.
- the terminal is made of copper or a copper alloy and the tin plating layer is formed on the surface.
- the present invention is not limited to this, and the terminal may be made of any metal as necessary. . Even when a metal plate material that is not plated is used as the material constituting the terminal, the end face can be more easily corroded than the other portions, so that the effects of the present invention can be obtained.
- the crimping process and the cutting process are performed in the same process.
- the present invention is not limited thereto, and the cutting process may be performed after the crimping process is performed.
- the insulation barrel 416 is formed on the terminal, but the insulation barrel 416 may be omitted.
- the water stop coating 425 is a region from the portion where the water stop wall 422 is formed in the extended portion 419 to the portion where the wire barrel 417, the insulation barrel 416, and the resin ring 423 are externally fitted. It is good also as a structure covered.
- the resin ring 423 has an annular configuration, but the present invention is not limited to this.
- the resin ring 423 is formed with a slit and the cross-sectional shape is substantially C-shaped. Also good. Accordingly, since the resin ring 423 can be easily expanded in diameter, for example, after the terminal is crimped to the electric wire 411, the diameter of the resin ring 423 can be increased and externally fitted to the electric wire 411.
- the both end portions 419D and 419D of the extending portion 419 are formed with at least one of the convex portion 419A and the concave portion 419F. However, at least one of the convex portion 419A and the concave portion 419F is shown. One may be formed only on one end 419D.
- the heat shrinkable tube 424 is used as the water blocking coating 425, but an elastic tube may be used as the water blocking coating 425.
- the technology disclosed in the present specification as a solution to the above problem is an electric wire with a terminal in which a terminal is connected to an electric wire formed by coating an outer periphery of a core wire with an insulating coating, and the terminal includes the insulating coating.
- the extending portion is formed by molding a synthetic resin.
- a cylindrical wall provided with a water blocking wall and covering the core wire between the water blocking wall and the end of the insulating coating in close contact with the outer surface of the water blocking wall and the outer surface of the end of the insulating coating
- a waterproof coating is provided, and at the end in the width direction of the extending portion, at least one of a convex portion protruding from the end portion and a concave portion recessed from the end portion is formed. It is an electric wire with a terminal characterized by this.
- the technique disclosed in the present specification is a terminal connected to the core wire exposed from an electric wire formed by coating the outer periphery of the core wire with an insulating coating, and the terminal is exposed from an end portion of the insulating coating.
- a wire barrel pressure-bonded to the core wire, and an extending portion extending from a bottom plate of the wire barrel, and the extending portion is provided with a water stop wall formed by molding synthetic resin.
- a cylindrical water-stop coating is provided that covers the core wire in close contact with the outer surface of the water-stop wall and the outer surface of the end of the insulating cover, and between the water-stop wall and the end of the insulating cover. At least one of a projecting portion protruding from the end portion and a recessed portion recessed from the end portion is formed at an end portion in the width direction of the extending portion. .
- the extension portion is provided with the water blocking wall, it is possible to prevent water from entering from the extension portion. Furthermore, since the water blocking wall is in close contact with the inner surface of the water blocking coating, it is possible to prevent water from entering between the water blocking wall and the water blocking coating. Thereby, since the area
- the waterproof property can be enhanced by providing the water blocking wall and the water blocking coating, but the gap between the end of the extension portion opposite to the wire barrel side and the water blocking wall.
- water may adhere to a part of the extension due to water soaking in.
- Terminals are often manufactured through a process in which a metal plate material is plated and then punched into a predetermined shape, so the end faces of the terminals are not plated and are more oxidized (corrosion) than other parts. Therefore, when water soaks into the extended portion, there is a concern that corrosion proceeds along the end face.
- the length of the end surface of the extending portion is convex. It is longer by the length of the periphery of a convex part or a recessed part than the thing of a structure without a part or a recessed part (refer FIG. 5). As a result, according to the present invention, since the corrosion path becomes long, it is possible to delay the corrosion reaching the wire barrel.
- the projecting portions are respectively formed at both ends of the extending portion in the width direction. If it is such an aspect, a corrosion path can be lengthened in the edge part of the both sides of the width direction of an extension part, and the intensity
- a hole is formed in the convex portion.
- the water blocking wall is formed so as to surround the outer periphery of the extending portion over the entire periphery. If it is set as such an aspect, since a water stop wall can closely_contact
- a resin ring is fitted on an end of the insulating coating, and an inner surface of the water blocking coating is in close contact with the resin ring. If it is set as such an aspect, since it can suppress reliably that water permeates from the edge part side of insulation coating, waterproofness can be improved further.
- the core wire and the wire barrel are surely waterproofed by the waterproof coating, so that the core wire or the wire barrel can be prevented from being melted by electrolytic corrosion. For this reason, it is particularly effective when the metal constituting the core wire is different from the metal constituting the terminal.
- the core wire is made of aluminum or an aluminum alloy.
- Aluminum or aluminum alloy has a relatively small specific gravity, so the weight of the wire can be reduced. On the other hand, since aluminum or aluminum alloy has a relatively high ionization tendency, it easily dissolves when electrolytic corrosion occurs. According to said aspect, since a core wire and a wire barrel are reliably water-stopped by a water-stop coating, it is especially effective when a core wire consists of aluminum or an aluminum alloy.
- an adhesive layer or an adhesive layer is formed on the inner peripheral surface of the water blocking coating.
- the inner peripheral surface of the water blocking coating and the region extending from the water blocking wall to the end of the insulating coating can be brought into close contact with each other without a gap.
- the water stop coating is a heat shrinkable tube or an elastic tube having rubber elasticity.
- the water-stop coating is a heat-shrinkable tube
- the inner diameter of the heat-shrinkable tube is relatively large before heating, so that it can be easily disposed on the outer periphery of the above region. Thereafter, the inner surface of the heat-shrinkable tube can be brought into close contact with the water blocking wall and the end portion of the insulating coating by being contracted by heating.
- a heat-shrinkable tube as the water-stop coating, it is possible to improve the working efficiency of the process of arranging the heat-shrink tube on the outer periphery of the region from the water blocking wall to the end of the insulating coating.
- the water blocking coating is an elastic tube
- the elastic tube is placed on the outer periphery of the region extending from the water blocking wall to the end of the insulating coating in a state where the diameter of the elastic tube is expanded, and then the elastic tube is restored and deformed. Then, the inner surface of the elastic tube is in close contact with the water blocking wall and the end of the insulating coating.
- the elastic tube can be covered from the water blocking wall to the end portion of the insulating coating by a simple process.
- a wire described in Japanese Patent Laid-Open No. 2000-259883 is known as an electric wire with a terminal.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which a core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire. The region from the substrate part to the end of the insulation coating is covered with a heat-shrink tube. ing.
- the substrate portion has a flat plate shape, a gap is easily formed between the one end side of the heat shrinkable tube and the substrate portion, so that water enters the heat shrinkable tube from this gap, There is concern about this water coming into contact with the core wire and wire barrel. As a result, there is a possibility that problems such as oxidation of the surface of the core wire or the wire barrel may occur.
- the technology disclosed in the present specification has been completed based on the above circumstances, and an object thereof is to provide a terminal-attached electric wire and a terminal excellent in waterproofness.
- FIG. 52 to 61 An embodiment embodying the present invention will be described in detail with reference to FIGS. 52 to 61.
- the terminal-attached electric wire 510 in this embodiment is a terminal-attached electric wire 510 in which a female terminal (terminal) 512 is connected to a terminal of an electric wire 511 in which an outer periphery of a core wire 513 is covered with an insulating coating 514.
- the electric wire 511 is an aluminum electric wire 511 provided with a core wire 513 made of aluminum or aluminum alloy, while the female terminal 512 is made of copper or copper alloy will be described.
- the electric wire 511 includes a core wire 513 formed by twisting a plurality of fine metal wires, and a synthetic resin insulating coating 514 that covers the outer periphery of the core wire 513.
- the insulating coating 514 has a predetermined length at the end of the electric wire 511. The end of the core wire 513 is exposed by being peeled.
- the core wire 513 may be a single core wire.
- the female terminal 512 includes a connection portion 520 connected to a male terminal (conductive member) on the other side (not shown), a wire barrel 517 crimped to the end of the core wire 513 exposed from the end of the insulating coating 514, and the wire barrel A connecting portion 519 that connects 517 and the connecting portion 520 is provided.
- the female terminal 512 has a structure in which a wire barrel 517 is provided behind the connecting portion 520 via a connecting portion 519, and an insulation barrel 516 is provided behind the wire barrel 517, and a metal plate material is pressed. As a whole, it has an elongated shape in the front-rear direction (see FIG. 52). A plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- the connecting portion 520 is connected by inserting a tab of a male terminal (not shown), and has a substantially rectangular tube shape into which the tab can be inserted, and an elastic contact piece 521 is provided inside.
- the connecting portion 519 is formed in a U-shaped cross section in which the side plate 519A is raised from both side edges of the bottom plate 515 (see FIG. 57).
- the wire barrel 517 functions to crimp the exposed end of the core wire 513 in the electric wire 511, and has a structure in which a pair of barrel pieces are raised from both side edges of the bottom plate 515.
- the wire barrel 517 is crimped and crimped into a so-called heart shape so that the core wire 513 is held from the outside and bites into the core wire 513 while abutting the protruding edges of both barrel pieces.
- a serration 518A is formed on the inner surface of the wire barrel 517 (see FIG. 55).
- the serration 518A is formed by aligning a plurality of recesses 518 having a parallelogram shape vertically and horizontally.
- the pair of opposing edges are formed in a direction orthogonal to the direction in which the core wire 513 extends, so that the fixing force between the core wire 513 and the wire barrel 517 is improved.
- the rim of the recess 518 caulks the wire barrel 517, it rubs against the metal oxide layer of the core wire 513 to crack the metal oxide layer, exposing the new metal surface of the core wire 513.
- the wire barrel 517 comes into contact with the new metal surface, and as a result, the electrical resistance value between the female terminal 512 and the core wire 513 can be lowered.
- the insulation barrel 516 functions to crimp the end of the insulation coating 514 remaining after the stripping of the electric wire 511, and has a structure in which a pair of tall barrel pieces are raised from both side edges of the bottom plate 515. It is.
- the insulation barrel 516 is crimped and crimped to a so-called overlap type in which the end of the insulating coating 514 is held from the outside while overlapping the protruding ends of the barrel pieces.
- the connecting portion 519 is provided with a water blocking wall 522 formed by molding a synthetic resin material.
- a synthetic resin material for forming the water blocking wall 522 a thermoplastic resin such as polyamide, polyester, polypropylene and polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 522 surrounds the entire outer surface of the connecting portion 519 (see FIG. 57). Specifically, the water blocking wall 522 fills the inner portion surrounded by the bottom plate 515 and the pair of side plates 519A without any gaps, and also forms a pair of side plates 519A from the opening side (the side opposite to the bottom plate 515) of the connecting portion 519.
- the connecting portion 519 is surrounded by a predetermined thickness dimension on both the outer side and the outer side of the bottom plate 515.
- the water blocking wall 522 includes the entire outer surface of the connecting portion 519, that is, the inner side surface 531 (opposing surface) and the outer side surface 532 of the pair of side plates 519A, the inner side surface 534 and the outer side surface 535 of the bottom plate 515, and the end surfaces of the side plates 519A. It is in close contact with 533 (the rising end surface from the bottom plate 515) without a gap. Note that a portion surrounded by the water blocking wall 522 in the entire outer surface of the connecting portion 519 is a boundary surface 530 with the water blocking wall 522.
- the water blocking wall 522 is equivalent to a portion located outside the outer surface 535 of the bottom plate 515, a portion located outside the outer surface 532 of the side plate 519A, and a portion located outside the end surface 533 of the side plate 519A. It has a thickness dimension and as a whole has a substantially rectangular cross section that is slightly larger than the connecting portion 519, and its corners are rounded.
- a resin ring 523 is fitted on the end of the insulating coating 514 (see FIG. 52). Specifically, the resin ring 523 is an end of the insulating coating 514 and is fitted at a position behind the pressure-bonding position of the insulation barrel 516 (in the direction opposite to the exposed core wire 513).
- the resin ring 523 is made of a synthetic resin and has a circular cross section.
- a synthetic resin material constituting the resin ring 523 a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the synthetic resin material constituting the resin ring 523 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the resin ring 523 is softened or melted, and the inner surface of the heat shrinkable tube 524 and the resin ring 523 are bonded. it can.
- the resin ring 523 and the outer peripheral surface of the insulating coating 514 can be bonded by forming the resin ring 523 from the synthetic resin material as described above.
- a heat-shrinkable tube 524 is attached in the range up to.
- the heat-shrinkable tube 524 is made of a synthetic resin, has a cylindrical shape, and its length dimension is a region extending from the front end edge of the water blocking wall 522 to the rear of the resin ring 523 in the insulating coating 514. Is a length dimension that can be coated.
- the inner surface of the heat-shrinkable tube 524 is in close contact with the outer surfaces of the water blocking wall 522, the core wire 513, the wire barrel 517, the insulation barrel 516, the resin ring 523, and the insulating coating 514 without any gaps.
- the heat-shrinkable tube 524 of this embodiment has an adhesive layer or an adhesive layer (not shown) formed on the inner surface thereof.
- the adhesive layer or the pressure-sensitive adhesive layer is heated and softened or melted to exhibit adhesiveness or tackiness.
- the heat-shrinkable tube 524 may be one that does not have an adhesive layer or an adhesive layer on its inner surface.
- the synthetic resin material constituting the water blocking wall 522 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the water blocking wall 522 is formed of such a synthetic resin material, in the step of heating the heat shrinkable tube 524, the water blocking wall 522 is softened or melted, and the inner surface of the heat shrinkable tube 524 and the outer surface of the water blocking wall 522 are used. It can be set as the structure which adhere
- An uneven portion 540 is formed on the boundary surface 530 of the connecting portion 519 with the water blocking wall 522 (see FIG. 53).
- the concavo-convex portion 540 is a surface on the side where the core wire 513 is disposed in the boundary surface 530 with the water blocking wall 522 in the connecting portion 519, that is, the inner side surface 531 of the pair of side plates 519A and the inner side surface 534 of the bottom plate 515 ( And an outer surface 532 of the pair of side plates 519A and an outer surface 535 of the bottom plate 515 (referred to as an outer boundary surface 537).
- the uneven portion 540 is formed by a groove portion 541 extending in the width direction with respect to the axial direction of the connecting portion 519 (the axial direction of the female terminal 512 from the connecting portion 520 side toward the wire barrel 517 side).
- the groove portion 541 has a length dimension obtained by adding the width dimension of the both side plates 519A and the width dimension of the bottom plate 515.
- the groove portion 541 is recessed in a trapezoidal shape, and as shown in FIG. 58, a bottom surface 542 and a pair of side surfaces 543 that spread obliquely outward (front-rear direction) from both side edges of the bottom surface 542, and Consists of.
- the bottom surface 542 and the side surface 543 have the same width dimension (width direction with respect to the extending direction of the groove portion 541).
- the bottom surface 542 is substantially parallel to the plate surface of the connecting portion 519 (the plate surface of the outer surface of the connecting portion 519 other than the region where the uneven portion 540 is formed).
- the pair of side surfaces 543 have the same inclination angle with respect to the bottom surface 542.
- a plurality of grooves 541 are formed side by side in the axial direction of the connecting portion 519, and the portions left between the grooves 541 become protrusions 544, and the concavo-convex portion 540 has the grooves 541 and the protrusions 544 alternately in the axial direction. It has a side-by-side form.
- the groove portions 541 are arranged at a constant interval in the axial direction of the connecting portion 519, and the protruding end surface of the protruding portion 544 formed between the adjacent groove portions 541 is a formation region of the uneven portion 540 in the plate surface of the connecting portion 519. It is set as the same position in the thickness direction as the plate surface of parts other than.
- More grooves 541 are formed on the inner boundary surface 536 than on the outer boundary surface 537.
- three grooves 541 are formed on the inner boundary surface 536 and two grooves are formed on the outer boundary surface 537.
- the groove portion 541 formed on the inner boundary surface 536 is referred to as an inner groove portion 541A
- the groove portion 541 formed on the outer boundary surface 537 is referred to as an outer groove portion 541B.
- the inner groove portion 541A and the outer groove portion 541B have substantially the same size and the same shape.
- the inner groove portion 541A and the outer groove portion 541B are formed at positions shifted in the axial direction of the connecting portion 519 (see FIG. 58). That is, in the axial direction of the connecting portion 519, the inner groove portions 541A and the outer groove portions 541B are alternately positioned.
- a protrusion 544 left by forming the outer groove 541B is arranged outside the inner groove 541A, and a protrusion 544 left by forming the inner groove 541A is arranged inside the outer groove 541B.
- the bottom surface 542 of the inner groove portion 541A and the bottom surface 542 of the outer groove portion 541B are located approximately at the center of the connecting portion 519 in the plate thickness direction.
- a punching process is performed on a metal plate material.
- a chain terminal 529 in which a plurality of terminal pieces 527 are connected to the side edge of the carrier 526 having a belt shape is formed.
- the carrier 526 is formed with feed holes 528 arranged at substantially equal intervals along the longitudinal direction.
- a feed claw (not shown) provided in the processing machine is engaged with the feed hole 528.
- a plurality of terminal pieces 527 are formed to be arranged at substantially equal intervals along the longitudinal direction of the carrier 526.
- a portion constituting the connecting portion 520, a portion constituting the connecting portion 519, a portion constituting the wire barrel 517, and a portion constituting the insulation barrel 516 are connected via a bottom plate 515 extending in the front-rear direction.
- serrations 518A are formed on the surface of the portion constituting the wire barrel 517 on the side where the core wire 513 is placed, and the uneven portion 540 is formed on the outer surface of the portion constituting the connecting portion 519. These may be formed in a process different from the punching process.
- the connecting portion 520, the connecting portion 519, the wire barrel 517, and the insulation barrel 516 are formed in a predetermined shape.
- a molding process for the water blocking wall 522 is performed.
- the feed hole 528 formed in the carrier 526 is engaged with the feed claw, and the synthetic resin material is molded into the connecting portion 519 of the terminal piece 527 while sequentially feeding the terminal pieces 527. More specifically, first, a portion of the connecting portion 519 where the water blocking wall 522 is to be formed is sandwiched between a pair of molds (not shown). Next, a molten synthetic resin material is injected into the cavity formed in the mold. After the synthetic resin material is solidified in the mold, the pair of molds are opened, and the terminal piece 527 on which the water blocking wall 522 is formed is detached from the mold. The above-described process is continuously performed on the plurality of terminal pieces 527 connected to the carrier 526 at substantially regular intervals (see FIG. 61).
- the crimping process of the electric wire 511 is executed.
- the insulation coating 514 of the electric wire 511 is peeled off to expose the core wire 513, and the resin ring 523 is fitted on the end of the insulation coating 514.
- the resin ring 523 is externally fitted to a portion of the insulating coating 514 that is different from the region to which the wire barrel 517 is crimped (portion located on the side opposite to the core wire 513).
- the core wire 513 exposed from the insulating coating 514 and the terminal portion of the insulating coating 514 are placed on the bottom plate 515 of the terminal piece 527.
- the insulation barrel 516 and the wire barrel 517 are bent and crimped from outside the insulating coating 514 and the core wire 513 using a mold (not shown). Simultaneously with this crimping process, a cutting process for cutting the carrier 526 and the terminal piece 527 is executed.
- a coating process of the heat shrinkable tube 524 is performed.
- the heat-shrinkable tube 524 is inserted from the female terminal 512 side and disposed so as to cover the position beyond the water blocking wall 522 and the resin ring 523.
- the heating process heated with the heating apparatus which is not illustrated is performed, and the heat contraction tube 524 is contracted.
- the inner surface of the heat-shrinkable tube 524 is in close contact with the outer surface of the terminal-attached electric wire 510 without a gap.
- the manufacture of the terminal-attached electric wire 510 is thus completed.
- the heat-shrinkable tube 524 may be inserted through the electric wire 511 in advance before performing the crimping process.
- connection portion 520 by heating the connection portion 520 in an upward direction, even if the water stop wall 522 is melted in the heating step, the synthetic resin material constituting the water stop wall 522 is connected to the connection portion 520. It is possible to prevent inflow. Thereby, the electrical connection reliability with the other party terminal in the connection part 520 can be improved.
- the water blocking wall 522 is formed by continuously performing a molding process on the plurality of terminal pieces 527 connected to the carrier 526. As a result, the working efficiency of the molding process can be improved.
- the cutting process is executed in the same process as the crimping process. Therefore, compared with the case where a cutting process and a crimping
- a terminal-attached electric wire 510 in which a female terminal 512 is connected to a terminal of an electric wire 511 whose outer periphery is covered with an insulating coating 514, and the female terminal 512 is insulated from a connection portion 520 connected to a mating terminal.
- a wire barrel 517 that is crimped to the end of the core wire 513 exposed from the end of the coating 514 and a connecting portion 519 that connects the wire barrel 517 and the connecting portion 520 are configured.
- the connecting portion 519 includes a synthetic resin material.
- a water blocking wall 522 formed by molding is provided.
- the water blocking wall 522 is in close contact with the outer surface of the water blocking wall 522 and the outer surface of the terminal of the insulating coating 514, and extends between the water blocking wall 522 and the terminal of the insulating coating 514.
- a cylindrical heat-shrinkable tube 524 that covers the core wire 513 is provided, and an uneven portion 540 is formed on a boundary surface 530 with the water blocking wall 522 in the connecting portion 519.
- the heat-shrinkable tube 524 is in close contact with the outer surface of the water blocking wall 522 and the outer surface of the end portion of the insulating coating 514, and the core wire 513 is extended between the water blocking wall 522 and the end portion of the insulating coating 514. Since it covers, it is possible to prevent water from entering the core wire 513 and to have excellent waterproof properties.
- an uneven portion 540 is formed on the boundary surface 530 with the water blocking wall 522 in the connecting portion 519.
- the boundary surface 530 with the water blocking wall 522 in the connection part 519 is a flat surface
- the water permeation path to the core wire 513 becomes longer, and high waterproofness can be secured over a long period of time. it can. That is, when the electric wire 510 with a terminal is used for a long period of time, if water adheres to the position of the front end edge of the portion molded by the water blocking wall 522 in the connecting portion 519, rust is generated in this attached portion, and finally Corrosion may occur.
- connection part 519 reduces by corrosion, a clearance gap will be made between the water stop walls 522, water will permeate into this clearance gap, and the corrosion range will spread further. In this way, there is a concern that the corrosion of the connecting portion 519 proceeds toward the inside of the water blocking wall 522 and eventually reaches the position of the exposed core wire 513.
- the configuration of the present embodiment by forming the uneven portion 540 on the boundary surface 530, the water intrusion path (the water blocking wall 522 in the connecting portion 519) to the core wire 513 by the side surface 543 of the groove portion 541. The distance along the axial direction of the plate surface between the position corresponding to the front edge and the position corresponding to the rear edge is increased, so that it is possible to earn time required for water to reach the core wire 513.
- the water blocking wall 522 surrounds the outer surface of the connecting portion 519 over the entire circumference, and the uneven portion 540 has an inner boundary surface 536 (core wire) of the boundary surface 530 with the water blocking wall 522 in the connecting portion 519. Since it is formed on both surfaces of the outer boundary surface 537 (the surface on the opposite side) and the outer boundary surface 537 (the surface on the side where 513 is disposed), the waterproof property can be further improved.
- the inner groove portion 541A (the groove portion 541 formed on the surface on which the core wire 513 is disposed) and the outer groove portion 541B (the groove portion 541 formed on the opposite surface) are displaced in the axial direction of the connecting portion 519. It is formed in the position.
- the thickness dimension at the position where both groove portions are formed is reduced, or The depth of the groove has to be reduced, and it is difficult to ensure both rigidity and improvement of waterproofness.
- the inner groove portion 541A and the outer groove portion 541B at positions shifted in the axial direction of the connecting portion 519, it is possible to avoid such a restriction, thereby ensuring both rigidity and improvement of waterproofness. Can be made.
- the adhesive layer or the adhesive layer is formed on the inner peripheral surface of the heat shrinkable tube 524, the adhesion between the heat shrinkable tube 524, the water blocking wall 522 and the insulating coating 514 is increased, so that the waterproof property is higher. Can be secured.
- the heat shrinkable tube 524 is provided with a large inner diameter before heating at the mounting position, and is shrunk by heating so that the inner surface becomes the outer surface of the water blocking wall 522 and the outer surface of the terminal of the insulating coating 514. Since it can be made to adhere, manufacture of electric wire 510 with a terminal can be performed easily.
- the core wire 513 and the female terminal 512 are formed of different metals.
- the core wire 513 and the female terminal 512 of the electric wire 511 are formed of different kinds of metals, if water is present in the connection portion between the two, the two metals are dissolved as ions in the water, and electrochemical reaction occurs. It is known that galvanic corrosion that proceeds with corrosion occurs. Therefore, it is particularly advantageous to ensure high waterproofness for a long period of time as in this embodiment.
- the electric wire 511 is an aluminum electric wire 511 provided with a core wire 513 made of aluminum or aluminum alloy, while the female terminal 512 is made of copper or copper alloy.
- a connecting portion between the two is used. There is concern about the occurrence of electrolytic corrosion due to moisture. Therefore, it is particularly advantageous to ensure high waterproofness for a long period of time as in this embodiment.
- the terminal is the female terminal 512.
- the present invention is not limited to this, and the terminal may be a male terminal having a male tab, and a so-called through hole is formed in the connection portion.
- An LA terminal or the like may be used, and a terminal having an arbitrary shape can be used as necessary.
- the core wire 513 of the electric wire 511 is made of aluminum or an aluminum alloy.
- the present invention is not limited to this, and the electric wire core wire may be made of copper or a copper alloy, and is optional as required. It is good also as a structure formed with these metals.
- the female terminal 512 is made of copper or a copper alloy and a tin plating layer is formed on the surface.
- the present invention is not limited to this, and the terminal is made of any metal as required. It is good.
- the cross-section of the water blocking wall 522 is substantially square.
- the cross-section of the water blocking wall is not limited to this, and the cross-section of the water blocking wall may be any shape such as a circular shape, an elliptical shape, or an oval shape. It is good.
- the waterproof coating is the heat-shrinkable tube 524, but is not limited to this, for example, a sheet-shaped waterproof tape that extends from the waterproof wall 522 to the end of the insulating coating 514 It is good also as what is wound around.
- the waterproof coating is the heat-shrinkable tube 524.
- the present invention is not limited to this, and the waterproof coating may be an elastic tube having rubber elasticity.
- the elastic tube expanded elastically is arranged at the mounting position and is elastically restored, thereby bringing the inner surface of the elastic tube into close contact with the outer surface of the water blocking wall 522 and the outer surface of the terminal of the insulating coating 514. Therefore, it is possible to easily manufacture the electric wire with terminal.
- the resin ring 523 has an annular shape, but the present invention is not limited to this.
- a slit may be formed in the resin ring and the cross-sectional shape may be substantially C-shaped.
- the molding process of the water blocking wall 522 is performed before the crimping process of the electric wire 511.
- the present invention is not limited thereto, and the molding process of the water blocking wall is performed after the crimping process of the electric wire. May be.
- the crimping process and the cutting process are performed in the same process.
- the present invention is not limited thereto, and the cutting process may be performed after the crimping process is performed.
- the concave and convex portion 540 is formed by forming the groove portion 541 extending in the width direction with respect to the axial direction from the connecting portion 520 side toward the wire barrel 517 side.
- the uneven portion 550 may be formed by bending the side plate 552 and the bottom plate 553 of the connecting portion 551 into a wave shape.
- the concavo-convex portion 540 includes the inner groove portion 541A and the outer groove portion 541B, and the protrusion 544 left between the groove portions 541 by forming the inner groove portion 541A and the outer groove portion 541B.
- the present invention is not limited to this. For example, as shown in FIG.
- the concavo-convex portion 560 forms a protrusion 564 on the inner boundary surface 563 by forming a groove 562 on the outer boundary surface 561
- the uneven portion 560 of the boundary surface 561 includes a groove portion 562 and a protrusion 565 left by forming the groove portion 562, and the uneven portion 560 of the inner boundary surface 563 is between the protrusion 564 and the protrusion 564. It is good also as what consists of the groove part 566 left in the. Moreover, it is good also as what the form of this uneven
- the concave and convex portion 540 is formed by forming the groove portion 541 extending in the width direction with respect to the axial direction from the connecting portion 520 side toward the wire barrel 517 side.
- the concavo-convex portion 570 may be formed by arranging, for example, point-like protrusions 571 on one surface.
- the circular protrusion 571 is shown, but it may be an arbitrary shape such as a square shape or a triangular shape, or may be a concave portion.
- the concavo-convex portion 540 is formed on both surfaces of the inner boundary surface 536 and the outer boundary surface 537, but is not limited thereto, and may be formed only on the inner boundary surface.
- a plurality of the groove portions 541 are formed side by side in the axial direction.
- the present invention is not limited to this, and a single groove portion may be formed.
- the groove portion 541 has a length dimension over the entire width direction of the connecting portion 519.
- the present invention is not limited thereto, and the groove portion may be shorter than the width dimension of the connecting portion.
- a plurality of short grooves may be arranged in the width direction of the connecting portion.
- the inner groove portion 541A and the outer groove portion 541B are formed at positions shifted in the axial direction.
- the present invention is not limited to this, and the inner groove portion and the outer groove portion are aligned at the axial direction. It may be formed.
- the terminal-attached electric wire is a terminal-attached electric wire in which a terminal is connected to an end of an electric wire whose outer periphery is covered with an insulating coating, and the terminal is connected to a conductive member.
- Connecting portion a wire barrel that is crimped to the end of the core wire exposed from the end of the insulating coating, and a connecting portion that connects the wire barrel and the connecting portion.
- a water blocking wall formed by molding a synthetic resin material is provided. The water blocking wall is in close contact with the outer surface of the water blocking wall and the outer surface of the terminal of the insulating coating, and extends between the water blocking wall and the terminal of the insulating coating.
- a cylindrical water-stop coating is provided to cover the core wire, and an uneven portion is formed on at least the surface on the side where the core wire is disposed in the boundary surface with the water stop wall in the connecting portion. Yes.
- the water blocking coating is in close contact with the outer surface of the water blocking wall and the outer surface of the end portion of the insulating coating, and covers the core wire between the water blocking wall and the end portion of the insulating coating. Therefore, it is possible to prevent water from entering the core wire side and to have excellent waterproofness.
- a concavo-convex portion is formed on at least the surface on the side where the core wire is disposed in the boundary surface with the water blocking wall in the connecting portion.
- the water blocking wall surrounds the outer surface of the connecting portion over the entire circumference, and the uneven portion is a side of the boundary surface with the water blocking wall at the connecting portion where the core wire is disposed. It is good also as what is formed in both surfaces of this surface and the surface on the opposite side. Thereby, waterproofness can be improved more.
- the concavo-convex portion may be formed with a groove portion extending in the width direction with respect to the axial direction from the connection portion side toward the wire barrel side.
- the uneven portion may be formed by arranging a plurality of the groove portions in the axial direction.
- the groove portion may have a length dimension over the entire width direction of the connecting portion.
- the water blocking wall surrounds the outer surface of the connecting portion over the entire circumference, and the uneven portion is a side of the boundary surface with the water blocking wall at the connecting portion where the core wire is disposed. And a groove formed on the surface on the side where the core wire is disposed and a groove formed on the surface on the opposite side are displaced in the axial direction. It may be formed at a different position.
- the thickness at the position where the groove is formed The dimension must be reduced or the depth of the groove portion must be reduced, and it is difficult to achieve both rigidity and waterproofing.
- the groove formed on the surface on which the core wire is disposed and the groove formed on the opposite surface at positions shifted in the axial direction, such a restriction can be avoided. Therefore, both the securing of rigidity and the improvement of waterproofness can be achieved.
- a resin ring may be externally fitted to the end portion of the insulating coating, and the water stop coating may be in close contact with the outer surface of the resin ring.
- an adhesive layer or an adhesive layer may be formed on the inner peripheral surface of the water blocking coating.
- the water blocking coating may be a heat shrinkable tube.
- a heat-shrinkable tube having a large inner diameter before heating is disposed at the mounting position, and is shrunk by heating, thereby bringing the inner surface of the heat-shrinkable tube into close contact with the outer surface of the water blocking wall and the outer surface of the terminal of the insulating coating. Therefore, it is possible to easily manufacture the electric wire with terminal.
- the water blocking coating may be an elastic tube having rubber elasticity.
- the elastic tube expanded elastically is arranged at the mounting position and elastically restored, whereby the inner surface of the elastic tube can be brought into close contact with the outer surface of the water blocking wall and the outer surface of the terminal of the insulating coating. Therefore, it is possible to easily manufacture the electric wire with terminal.
- the core wire and the terminal may be made of different metals.
- the core wire and the terminal of the electric wire are formed of different kinds of metals, if moisture is present in the connection portion between the two, the two metals are dissolved as ions in the water, and corrosion proceeds due to an electrochemical reaction. It is known that electric corrosion occurs. Therefore, in such a case, it is particularly advantageous to ensure high waterproofness for a long period of time.
- the electric wire may be an aluminum electric wire having a core wire made of aluminum or aluminum alloy.
- the weight reduction of an electric wire can be achieved.
- a terminal made of a copper alloy or the like due to a problem such as strength, there is a concern that moisture may intervene in the connection portion between the two and electrolytic corrosion may occur. Therefore, in such a case, it is particularly advantageous to ensure high waterproofness for a long period of time.
- the terminal according to the technique disclosed in the present specification is a terminal connected to a terminal of an electric wire whose outer periphery of a core wire is covered with an insulating coating, and is connected to a conductive member and a terminal of the insulating coating.
- a water barrel formed by including a wire barrel to be crimped to the exposed end of the core wire, and a connecting portion connecting the wire barrel and the connecting portion, and molding the synthetic resin material in the connecting portion
- a cylindrical water-stop coating can be mounted so as to cover the core wire between the water-stop wall and the end of the insulating coating.
- grooved part is formed in the surface at the side by which the said core wire is arrange
- the water blocking wall surrounds the outer surface of the connecting portion over the entire circumference, and the uneven portion is a side of the boundary surface with the water blocking wall at the connecting portion where the core wire is disposed. It is good also as what is formed in both surfaces of this surface and the surface on the opposite side.
- the concavo-convex portion may be formed with a groove portion extending in the width direction with respect to the axial direction from the connection portion side toward the wire barrel side.
- the uneven portion may be formed by arranging a plurality of the groove portions in the axial direction.
- the groove portion may have a length dimension over the entire width direction of the connecting portion.
- the water blocking wall surrounds the outer surface of the connecting portion over the entire circumference, and the uneven portion is a side of the boundary surface with the water blocking wall at the connecting portion where the core wire is disposed. And a groove formed on the surface on the side where the core wire is disposed and a groove formed on the surface on the opposite side are displaced in the axial direction. It may be formed at a different position.
- an electric wire with a terminal accommodated in a connector is known.
- This electric wire with a terminal includes an electric wire formed by coating the outer periphery of a core wire with an insulating coating, and a terminal connected to the core wire exposed from the insulating coating.
- the terminal includes a flat plate-like substrate portion on which the core wire is placed, and a wire barrel that protrudes from the substrate portion and is crimped to the core wire.
- a region from the substrate part to the end of the insulating coating is covered with a heat shrinkable tube.
- One end of the heat-shrinkable tube covers a core wire crimped by a wire barrel and the other end is in close contact with the insulating coating.
- the substrate portion has a flat plate shape, there is a concern that a gap is formed between one end side of the heat shrinkable tube and the substrate portion. Then, there is a concern that water enters the heat-shrinkable tube from this gap and this water comes into contact with the core wire and the wire barrel. Then, we are anxious about generating troubles, such as the surface of a core wire or a wire barrel being oxidized.
- the technology disclosed in the present specification has been completed based on the above situation, and aims to prevent water from entering the electric wire side.
- FIGS. 1-10 A connector according to Embodiment 6-1 of the present invention will be described with reference to FIGS.
- the left side of FIG. 71 is assumed to be the front and the right side is assumed to be the rear side, and for the vertical direction, the front side of FIG.
- connector 630 is a female connector, and is configured to be matable with a mating male connector 640 (an example of “mating connector”).
- a mating male connector 640 (shown schematically in FIG. 71 with a chain line) includes a male connector housing 641 made of synthetic resin and male terminals 642 accommodated in the male connector housing 641.
- the male connector housing 641 includes a hood portion that opens in a cylindrical shape in the fitting direction, and a back wall portion that closes the inside of the hood portion.
- a rod-shaped L-shaped male terminal 642 that penetrates the back wall portion. Protrudes into the hood.
- the connector 630 includes a connector housing 631 made of a synthetic resin and a plurality (four pieces) of terminal-attached electric wires 610 housed in the connector housing 631.
- the connector housing 631 has a rectangular parallelepiped shape, and four (plural) cavities 632 into which the female terminals 612 can be inserted from the rear are arranged in the width direction.
- the cavity 632 has a substantially circular shape and is formed over substantially the entire length in the front-rear direction of the connector housing 631.
- the diameter of the substantially rear half is slightly larger than the diameter of the substantially front half, The diameter is almost constant.
- a front stop wall 633 facing the front surface of the female terminal 612 is formed at the front end portion of the cavity 632, and a through hole 634 through which the male terminal 642 is passed is formed in the front stop wall 633.
- each cavity 632 has a cantilever shape extending forward, and a front end of the cavity 632 engages with the female terminal 612 to prevent the female terminal 612 from coming out backward. Is formed.
- the connector housing is formed with a lock portion for holding the mating state with the mating connector housing, and this lock portion is locked to the lock receiving portion of the mating connector housing. It is possible.
- the terminal-attached electric wire 610 includes an electric wire 611 and a female terminal 612 (an example of a “terminal”) connected to the terminal of the electric wire 611.
- the electric wire 611 includes one core wire 613 formed by twisting a plurality of fine metal wires, and an insulating coating 614 made of a synthetic resin that covers the outer periphery of the core wire 613.
- the core wire 613 is comprised from arbitrary metals as needed, such as copper, a copper alloy, aluminum, and an aluminum alloy. In this embodiment, aluminum or an aluminum alloy is used.
- the core wire 613 is exposed by peeling off the insulating coating 614.
- the core wire 613 may be a single core wire.
- the female terminal 612 is formed by pressing a metal plate material into a predetermined shape.
- a metal constituting the female terminal 612 any metal such as copper, a copper alloy, or the like can be adopted as necessary.
- a plating layer (not shown) is formed on the surface of the metal plate.
- a metal which comprises a plating layer arbitrary metals, such as tin and nickel, can be employ
- a tin plating layer is formed on the surface of copper or a copper alloy.
- the female terminal 612 includes a bottom plate 615 on which the insulating coating 614 and the core wire 613 of the electric wire 611 are placed.
- a pair of insulation barrels 616 protrude from the side edge of the bottom plate 615.
- the insulation barrel 616 is pressure-bonded to the insulation coating 614 so as to be held from the outside of the insulation coating 614 in a state where the insulation coating 614 and the core wire 613 of the electric wire 611 are placed on the bottom plate 615.
- the pair of insulation barrels 616 are folded (overlapped) at the top, but the present invention is not limited to this.
- the ends of the pair of insulation barrels 616 are arranged in the width direction. You may use the thing of the structure made to face
- a pair of wire barrels 617 are formed on the bottom plate 615 so as to protrude from the side edges of the bottom plate 615 at positions closer to the end of the core wire 613 than the insulation barrel 616.
- the wire barrel 617 is crimped to the core wire 613 so as to be held from the outside of the core wire 613 in a state where the insulating coating 614 and the core wire 613 of the electric wire 611 are placed on the bottom plate 615.
- a region corresponding to the wire barrel 617, and the wire barrel 617 are formed with a plurality of recesses 618 on the surface on which the core wire 613 is placed.
- the concave portion 618 has a substantially square shape, and specifically has a substantially parallelogram shape.
- Recess 618 includes a pair of first sides that are substantially orthogonal to the direction in which core wire 613 extends (the left-right direction in FIG. 69), and a pair of second sides that intersect with the direction in which core wire 613 extends at an angle smaller than 90 °. .
- the adjacent recesses 618 are arranged such that the first sides are arranged in a straight line, and the second sides are arranged in a straight line.
- the first sides of the recesses 618 adjacent to each other in the direction in which the core wire 613 extends are arranged so as to overlap in the direction in which the core wire 613 extends, so that the fixing force between the core wire 613 and the wire barrel 617 can be improved. it can.
- the rims of the plurality of recesses 618 are in sliding contact with the surface of the core wire 613, the contact area between the rims of the recesses 618 and the core wire 613 is increased, and as a result, the electrical resistance value between the female terminal 612 and the core wire 613 is reduced. be able to.
- the bottom plate 615 is formed with an extending portion 619 that further extends in the extending direction of the core wire 613 and is bent into a concave shape on the surface on which the core wire 613 is placed.
- the extending portion 619 has a substantially U-shaped cross section and opens upward.
- a cross-sectional shape of the extension part 619 it is good also as a semicircle shape, for example, and it can be set as arbitrary shapes as needed.
- the extension portion 619 is formed with a connecting cylinder portion 620 that further extends in the direction in which the core wire 613 extends to form a cylindrical shape and connect to a mating terminal (not shown).
- An elastic contact piece 621 that elastically contacts the mating terminal is provided in the connecting tube portion 620.
- a water blocking wall 622 is formed on the extending portion 619 by molding a synthetic resin material.
- a synthetic resin material for forming the water blocking wall 622 a thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- the water blocking wall 622 is formed so as to surround the outer periphery of the extending portion 619 over the entire periphery.
- the extension portion 619 is filled with a water blocking wall 622.
- the cross section of the water blocking wall 622 has a substantially square shape with rounded corners.
- a resin ring 623 made of synthetic resin is fitted on the end of the electric wire 611. More specifically, a resin ring 623 having a circular cross section is provided at the end of the insulating coating 614 and behind the portion where the insulation barrel 616 is crimped (in the direction opposite to the exposed core wire 613). It is fitted.
- the inner diameter of the resin ring 623 is set to be substantially the same as the outer diameter of the insulating coating 614. Thereby, the resin ring 623 can be easily fitted on the end portion of the electric wire 611.
- substantially the same means that the inner diameter of the resin ring 623 is the same as the outer diameter of the insulating coating 614, the inner diameter of the resin ring 623 is slightly larger than the outer diameter of the insulating coating 614, and the inner diameter of the resin ring 623 is insulated. And a case that is slightly smaller than the outer shape of the coating 614.
- thermoplastic resin such as polyamide, polyester, polypropylene, or polyethylene may be used, or a thermosetting resin such as an epoxy resin may be used. Any synthetic resin material can be used. As for said synthetic resin material, only 1 type may be used and a multiple types of synthetic resin material may be mixed and used. In the present embodiment, a polyamide-based thermoplastic resin is used.
- Water-stop coating 625) From the portion of the extending portion 619 where the water blocking wall 622 is formed, to the portion where the wire barrel 617, the insulation barrel 616, and the resin ring 623 are externally fitted, and beyond the resin ring 623 to the insulating coating 614 This region is covered with a water-stop coating 625 made of a synthetic resin material.
- the water blocking coating 625 includes a heat shrinkable tube 624.
- an adhesive layer or an adhesive layer (not shown) is formed on the inner surface of the heat shrinkable tube 624. The adhesive layer or the pressure-sensitive adhesive layer is heated and softened or melted to exhibit adhesiveness or tackiness.
- the length dimension of the heat-shrinkable tube 624 is set to be longer than the length dimension of the region from the water blocking wall 622 to the resin ring 623.
- the inner surface of the heat-shrinkable tube 624 is in close contact with the outer peripheral surface of the water blocking wall 622 without any gap in a state where the heat-shrinkable tube 624 is heated and contracted. Further, the inner surface of the heat shrinkable tube 624 is in close contact with the outer peripheral surface of the resin ring 623 without any gap.
- the portion including the portion covering the insulation barrel 616 that surrounds the insulating coating 614 and the portion covering the resin ring 623 (range A in FIG. 67)
- the vertical direction and the left-right direction (the insertion direction of the terminal-attached electric wire 610 into the cavity 632) and the vertical direction and the left-right direction from the portion covering the water blocking wall 622, the portion covering the wire barrel 617, the portion covering the core wire, the portion covering the insulating coating 614, etc.
- This is a large diameter portion 629 in which the diameter in the direction perpendicular to the cross section is increased.
- the front side of the large diameter part 629 is a small diameter part 639A
- the rear side of the large diameter part 629 is a small diameter part 639B.
- the synthetic resin material constituting the water blocking wall 622 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the water blocking wall 622 in the step of heating the heat shrinkable tube 624, the water blocking wall 622 can be softened or melted, and the inner surface of the heat shrinkable tube 624 and the water blocking wall 622 can be bonded.
- a synthetic resin material constituting the resin ring 623 a material that exhibits adhesiveness by being softened or melted by heating may be used.
- the resin ring 623 in the step of heating the heat-shrinkable tube 624, the resin ring 623 can be softened or melted to bond the inner surface of the heat-shrinkable tube 624 and the resin ring 623.
- the resin ring 623 and the outer peripheral surface of the insulating coating 614 can be bonded by forming the resin ring 623 from the synthetic resin material as described above.
- the large-diameter portion 629 of the heat-shrinkable tube 624 of the terminal-attached electric wire 610 is disposed outside the cavity 632 (not inserted into the cavity 632).
- the small diameter portion 639 ⁇ / b> A ahead of the large diameter portion 629 is accommodated (inserted) in the cavity 632.
- the dimension B2 (diameter in the left-right direction) of the cavity 632.
- the dimension C of the insulation barrel 616 (diameter in the left-right direction) must be secured for the cavity 632 in the direction perpendicular to the insertion direction of the terminal-attached electric wire 610, and the connector housing 631 is increased in size.
- the female terminal 612 is covered with the heat-shrinkable tube 624 as in the present embodiment, the large diameter portion 629 is accommodated (inserted) inside the cavity 632 like the small diameter portion 639A.
- the cavity 632 has to be further enlarged by a dimension (dimension D in FIG. 72) obtained by adding the thickness of the heat-shrinkable tube 624 to the dimension C (diameter in the left-right direction) of 616, and a request for downsizing of the connector is required. I can't respond enough.
- the large-diameter portion 629 is arranged outside the cavity 632, so that the dimension B1 ( ⁇ B2) of the cavity 632 is larger than the large-diameter portion 629. It is sufficient to secure a dimension that allows the small diameter portion 639A having a small diameter to be inserted. Therefore, since the diameter of the cavity 632 does not need to be increased, the connector 630 can be reduced in size.
- the insulation barrel 616 originally needs to be insulated from the outside, and thus cannot be arranged outside the cavity 632.
- the portion of the insulation barrel 616 is the heat-shrinkable tube 624. Insulation from the outside of the insulation barrel 616 can be ensured.
- a carrier 626 having a strip shape and a plurality of terminal pieces 627 connected to the side edges of the carrier 626 are formed (see FIG. 69).
- the carrier 626 is formed with feed holes 628 arranged at substantially equal intervals along the longitudinal direction.
- a feed claw (not shown) provided in the processing machine is engaged with the feed hole 628.
- a plurality of terminal pieces 627 are connected to the carrier 626 side by side at substantially equal intervals along the longitudinal direction.
- the terminal piece 627 includes a bottom plate 615 on which the insulating coating 614 and the core wire 613 of the electric wire 611 are placed, an insulation barrel 616 that protrudes from the bottom plate 615 and is crimped to the insulating coating 614, and protrudes from the bottom plate 615 to the core wire 613.
- a plurality of recesses 618 may be formed on the surface of the wire barrel 617 on the side where the core wire 613 is placed. Further, the recess 618 may be formed in a process different from the punching process.
- the core wire 613 is formed so as to extend in the extending direction of the core wire 613 in a state where the core wire 613 is placed on the bottom plate 615, and the surface on which the core wire 613 is placed is formed in a concave shape.
- a portion 619 and a connecting tube portion 620 formed to extend in a direction corresponding to the direction in which the core wire 613 extends from the extending portion 619 are formed.
- the synthetic resin material is molded on the extending portion 619 of the terminal piece 627 while sequentially feeding the terminal pieces 627. More specifically, first, a portion of the extending portion 619 where the water blocking wall 622 is to be formed is sandwiched by a pair of molds (not shown). Next, a molten synthetic resin material is injected into the cavity formed in the mold. After the synthetic resin material is solidified in the mold, the pair of molds are opened, and the terminal piece 627 on which the water blocking wall 622 is formed is detached from the mold. The above-described steps are continuously performed on the plurality of terminal pieces 627 connected to the carrier 626 at substantially constant intervals (see FIG. 70).
- the insulation coating 614 of the electric wire 611 is peeled to expose the core wire 613.
- the resin ring 623 is fitted on the end portion of the insulating coating 614.
- the resin ring 623 is externally fitted to a portion of the insulating coating 614 that is different from the region to which the wire barrel 617 is crimped (portion located on the side opposite to the core wire 613).
- a crimping process is performed on the terminal piece 627. More specifically, the core wire 613 and the insulation coating 614 exposed from the electric wire 611 are placed on the bottom plate 615 of the terminal piece 627. Thereafter, the insulation barrel 616 and the wire barrel 617 are bent by a mold (not shown) so as to be held from the outside of the insulating coating 614 and the core wire 613, respectively. As a result, the insulation barrel 616 is crimped to the insulating coating 614 and the wire barrel 617 is crimped to the core wire 613.
- a cutting process for cutting the carrier 626 and the terminal piece 627 is performed simultaneously with the above-described crimping process. As a result, each terminal piece 627 is cut from the carrier 626 to be a female terminal 612 and to a terminal-attached electric wire 610 connected to the electric wire 611.
- the heat-shrinkable tube 624 is inserted from the electric wire 611 side or the female terminal 612 side, and is disposed in a region from the water blocking wall 622 to the insulating coating 614 beyond the resin ring 623.
- the inner diameter of the heat-shrinkable tube 624 can be inserted from the female terminal 612 side relatively easily by setting the inner diameter of the heat-shrinkable tube 624 to be larger than the outer shape of the connection tube portion 620 in the state before heating.
- the heat-shrinkable tube 624 may be inserted through the electric wire 611 in advance before performing the crimping process.
- the heat-shrinkable tube 624 is contracted by executing a heating process of heating with a heating device (not shown). Thereby, the inner surface of the heat-shrinkable tube 624 is brought into close contact with the water blocking wall 622 and the resin ring 623 without a gap. Thus, the terminal-attached electric wire 610 is completed.
- the connecting tube portion 620 by heating the connecting tube portion 620 in an upward direction, the synthetic resin material constituting the water blocking wall 622 is connected to the connecting tube even when the water blocking wall 622 is melted in the heating process. Inflow into the portion 620 can be suppressed. Thereby, the electrical connection reliability with the other party terminal in the connection cylinder part 620 can be improved.
- the extension portion 619 is filled with the water blocking wall 622, so that water enters from the extension portion 619 and the water adheres to the core wire 613 and the wire barrel 617. This can be suppressed. Furthermore, since the outer peripheral surface of the water blocking wall 622 is in close contact with the inner surface of the heat shrinkable tube 624 (water blocking coating) without any gaps, the gap between the water blocking wall 622 and the heat shrinkable tube 624 is between them. Ingress of water is also suppressed.
- the insulating coating 614 extends beyond the portion where the water blocking wall 622 is formed in the extending portion 619 to the portion where the wire barrel 617, the insulation barrel 616, and the resin ring 623 are externally fitted, and further beyond the resin ring 623. Since the region up to is stopped by the heat-shrinkable tube 624, it is possible to reliably suppress water from adhering to the core wire 613 and the wire barrel 617.
- the diameter in the direction orthogonal to the terminal insertion direction is larger by the thickness of the heat-shrinkable tube 624 than when the heat-shrinkable tube 624 is not provided. Become. Therefore, when the terminal-attached electric wire 610 having the heat-shrinkable tube 624 is to be inserted into the cavity 632 of the connector housing 631, the diameter of the cavity 632 must be increased according to the thickness of the heat-shrinkable tube 624, and the connector 630 May be an obstacle to downsizing.
- the female terminal 612 is the cavity 632.
- the cavity 632 is disposed outside the cavity 632, so that it is not necessary to enlarge the cavity 632 according to the diameter of the large diameter portion 629. Therefore, the heat-shrinkable tube 624 (water-stop coating) can be reliably waterproofed and the connector can be downsized.
- the present embodiment is applied to a configuration in which a cylindrical heat-shrinkable tube 624 (water blocking coating 625) that covers the core wire 613 is provided between the water blocking wall 622 and the end of the insulating coating 614. Therefore, the large diameter portion 629 formed by the insulation barrel 616 covered with the heat shrinkable tube 624 is insulated from the outside by the heat shrinkable tube 624. Therefore, when the female terminal 612 (terminal) having the insulation barrel 616 is used, the connector can be reduced in size while being reliably insulated from the outside.
- a resin ring 623 is fitted on the end of the insulating coating 614, and the inner surface of the heat shrinkable tube 624 is in close contact with the resin ring 623 without any gap.
- the core wire 613 is made of aluminum or an aluminum alloy and the female terminal 612 is formed by forming a tin plating layer on the surface of copper or a copper alloy, aluminum having a relatively large ionization tendency
- the core wire 613 made of an aluminum alloy is particularly effective because it may be dissolved by electrolytic corrosion. Note that the specific gravity of aluminum or aluminum alloy is relatively small, and thus the electric wire 611 can be reduced in weight.
- the water-stop coating 625 includes the heat-shrinkable tube 624.
- the inner diameter of the heat-shrinkable tube 624 is relatively large, so that it can be easily disposed on the outer periphery of the region.
- the inner surface of the heat shrinkable tube 624 can be brought into close contact with the end portions of the water blocking wall 622 and the insulating coating 614 without any gap.
- the heat shrinkable tube 624 as the water blocking coating 625, the work efficiency of the process of arranging the heat shrinkable tube 624 on the outer periphery of the region extending from the water blocking wall 622 to the end of the insulating coating 614 is improved. Can do.
- the terminal is the female terminal 612.
- the terminal is not limited to this, and the male terminal includes a male tab formed to extend further in the direction in which the core wire 613 extends from the extending portion 619.
- It may be a terminal, or it may be a so-called LA terminal in which a disk-like connection part is formed continuously with the extension part 619 and a through hole is formed in this connection part.
- It may be a splice terminal in which a plurality of electric wires 611 are connected to another wire barrel 617 further formed in connection with the portion 619, and may be a terminal having an arbitrary shape as necessary.
- the cross-section of the water blocking wall 622 has a substantially square shape, but is not limited thereto, and may be a circular shape, an elliptical shape, an oval shape, or a triangular shape.
- the polygonal shape may be sufficient and it can be set as arbitrary shapes as needed.
- the water blocking coating 625 may be configured to wind a sheet of water blocking tape around a region from the water blocking wall 622 to the end of the insulating coating 614.
- the water blocking wall 622 is formed before the step of crimping the wire barrel 617 to the core wire 613.
- the present invention is not limited to this, and the water blocking wall 622 includes the core wire 613. It is good also as a structure formed after crimping
- the core wire 613 is made of aluminum or an aluminum alloy.
- the present invention is not limited to this, and the core wire 613 may be made of copper or a copper alloy. It is good also as a structure formed with a metal.
- the female terminal 612 is made of copper or a copper alloy and a tin plating layer is formed on the surface.
- the present invention is not limited to this, and the female terminal 612 can be made of any metal as required. It is good also as composition which consists of.
- Embodiment 6-1 the crimping process and the cutting process are performed in the same process. However, the present invention is not limited to this, and the cutting process may be performed after the crimping process is performed. . (7) In the embodiment 6-1, the terminal is formed with the insulation barrel 616, but the insulation barrel 616 may be omitted.
- the water stop coating 625 is a region from the portion where the water stop wall 622 is formed in the extending portion 619 to the portion where the wire barrel 617, the insulation barrel 616, and the resin ring 623 are externally fitted. It is good also as a structure covered.
- the resin ring 623 has an annular configuration, but the present invention is not limited to this.
- the resin ring 623 is formed with a slit and the cross-sectional shape is substantially C-shaped. It is good also as a form. Accordingly, since the resin ring 623 can be easily expanded in diameter, for example, after the terminal is crimped to the electric wire 611, the diameter of the resin ring 623 can be increased and externally fitted to the electric wire 611.
- the large-diameter portion 629 is the range A from the insulation barrel 616 to the resin ring 623 in the heat-shrinkable tube 624, but is not limited thereto.
- the large-diameter portion 629 may be formed from one of the insulation barrel 616 and the heat-shrinkable tube 624, or may be formed from any one other than the insulation barrel 616 and the heat-shrinkable tube 624. .
- a plurality of large diameter portions 629 may be formed.
- the portions of the insulation barrel 616 and the resin ring 623 of the heat-shrinkable tube 624 are included.
- Each can be a large diameter portion (a plurality of large diameter portions).
- all the large-diameter portions may be arranged outside the cavity 632, but the larger-diameter portion of the plurality of large-diameter portions is outside the cavity 632. Those having a smaller diameter may be accommodated (inserted) inside the cavity 632.
- the resin ring 623 is provided between the heat-shrinkable tube 624 and the insulation coating 614 of the electric wire 611.
- the resin ring 623 may be omitted.
- a connector that can be mated with a mating connector according to the technology disclosed in the present specification, wherein the connector includes a terminal-attached electric wire in which a terminal is connected to an electric wire formed by covering an outer periphery of a core wire with an insulating coating.
- a connector housing having a cavity through which the terminal is inserted, wherein the terminal is crimped to the core wire exposed from the end of the insulating coating, and extends from a bottom plate of the wire barrel
- a water stop wall formed by molding a synthetic resin on the extending portion, and is in close contact with the outer surface of the water stop wall and the outer surface of the end portion of the insulating coating.
- the configuration of the means 1 it is possible to suppress water from entering the electric wire side by the water blocking wall. Furthermore, since the outer surface of the water blocking wall is in close contact with the water blocking coating, it is possible to prevent water from entering between the water blocking wall and the water blocking coating. Thereby, since the area
- the diameter in the direction orthogonal to the terminal insertion direction is larger by the thickness of the waterproof coating than in the case without the waterproof coating. If it is going to insert the electric wire with a terminal which has into the cavity of a connector housing, the diameter of a cavity must be enlarged according to the thickness part of a water stop coating
- the large diameter portion having a large diameter in the direction orthogonal to the insertion direction of the terminal in the waterproof coating is arranged outside the cavity when the terminal is inserted into the normal position of the cavity. Therefore, it is not necessary to enlarge the cavity according to the diameter of the large diameter portion. Therefore, waterproofing can be ensured by the waterproof coating, and the connector can be downsized.
- the terminal includes an insulation barrel for holding the insulating coating of the electric wire, and the large-diameter portion is formed by the insulation barrel covered with the waterproof coating. (Means 2).
- the portion of the insulation barrel that holds the insulation coating of the electric wire needs to be insulated from the outside, and therefore cannot normally be arranged outside the cavity.
- the present invention is applied to a configuration in which a cylindrical water-stopping covering the core wire is provided between the water-stopping wall and the end of the insulating cover, the water-stopping cover is covered.
- the large-diameter portion of the broken portion is insulated from the outside by a waterproof coating. Therefore, according to the configuration of the means 2, the large-diameter portion is formed by the insulation barrel covered with the waterproof coating, so when using a terminal having the insulation barrel, The connector can be miniaturized while ensuring insulation.
- a resin ring may be externally fitted to the end of the insulating coating, and the inner surface of the water blocking coating may be in close contact with the resin ring (means) 3).
- the configuration of the means 3 it is possible to reliably waterproof between the waterproof coating and the insulating coating even when the waterproof coating without the adhesive layer is used. Moreover, since a water-stop coating without an adhesive layer can be used, the manufacturing cost can be reduced.
- the metal constituting the core wire and the metal constituting the terminal may be different (means 4).
- the metal which comprises a core wire differs from the metal which comprises a terminal, if water adheres over both a core wire and a wire barrel, electrolytic corrosion will generate
- a core wire and a wire barrel are reliably waterproofed by a water stop coating, it can suppress that a core wire or a wire barrel melt
- the core wire may be made of aluminum or an aluminum alloy (means 5).
- the specific gravity of aluminum or aluminum alloy is relatively small, so that the weight of the electric wire can be reduced.
- aluminum or aluminum alloy has a relatively high ionization tendency, it easily dissolves when electrolytic corrosion occurs.
- a core wire and a wire barrel are reliably water-stopped by a water-stop coating, it is especially effective when a core wire consists of aluminum or an aluminum alloy.
- an adhesive layer or an adhesive layer may be formed on the inner peripheral surface of the water blocking coating (means 6).
- the inner peripheral surface of the water blocking coating and the region extending from the water blocking wall to the end of the insulating coating can be closely adhered.
- the water-stop coating may be a heat shrinkable tube (means 7).
- the inner diameter of the heat-shrinkable tube is relatively large in the state before heating, it can be easily arranged on the outer periphery of the above region. Thereafter, the inner surface of the heat-shrinkable tube can be brought into close contact with the water blocking wall and the end portion of the insulating coating by being contracted by heating.
- a heat-shrinkable tube as the water-stop coating, it is possible to improve the working efficiency of the process of arranging the heat-shrink tube on the outer periphery of the region from the water blocking wall to the end of the insulating coating.
- a wire described in Japanese Patent Application Laid-Open No. 2000-259883 is known as an electric wire with a terminal.
- This electric wire with a terminal includes an electric wire whose outer periphery is coated with an insulating layer, and a terminal connected to the core wire exposed from the insulating layer.
- the connection part of the said core wire is crimped
- the electric wire with terminal is used, for example, in an engine room of an automobile.
- water can enter the engine room, so that there is a possibility that water may come into contact with the connection portion between the terminal and the electric wire.
- the terminal made of a metal material and the core wire are corroded.
- the electric wire with a terminal described in Patent Document 1 covers a heat shrinkable tube around the connection portion. By covering the heat-shrinkable tube in this way, water is prevented from permeating from the periphery of the connecting portion of the electric wire with terminal.
- the heat-shrinkable tube is covered with a connection portion between the terminal and the electric wire in a state before heat-shrinking (that is, before heat treatment). At this time, the unheated heat-shrinkable tube is covered while its position is adjusted so as to surround the connecting portion.
- the heat-shrinkable tube is heat-treated in such a state that the position is adjusted (that is, positioned). By this heat treatment, the heat-shrinkable tube is heat-shrinked to be in close contact with the connection portion, and is attached to the electric wire.
- the position of the heat shrinkable tube may be shifted after being positioned over the electric wire with terminal.
- the inner diameter of the heat shrinkable tube is set to be large to some extent. For this reason, even if the heat shrinkable tube is positioned, there is a gap between the heat shrinkable tube and the connection portion, so that the position is easily displaced from the connection portion.
- the heat-shrinkable tube even when the unheated heat-shrinkable tube that has been positioned and covered has a certain degree of elasticity in that state and is in close contact with the connecting portion, the heat-shrinkable tube will be removed over time.
- the heat-shrinkable tube may naturally move and shift due to the elastic force (restoring force) of the tube itself.
- the heat treatment may be performed immediately after the heat-shrinkable tube is covered, or may be performed after a certain amount of time. Therefore, the position shift of the heat shrinkable tube as described above is a problem.
- the heat-shrinkable tube receives a force by contacting with a surrounding object, and as a result, the position may be shifted.
- the heat-shrinkable tube once positioned and covered does not shift from the connection portion.
- the tube-shaped covering member other than the heat-shrinkable tube used in this type of terminal-attached electric wire is also desired not to be displaced after positioning over the electric wire with terminal. Yes.
- the technology disclosed in the present specification has been completed based on the above-described circumstances, and it is easy to position by covering a cylindrical water stop coating, and has excellent waterproofness, and the electric wire It aims at providing the terminal attached to.
- the electric wire with terminal 701 includes an electric wire 702, a terminal 703 attached to an end of the electric wire 702, a water stop wall 704 attached to the terminal 703, and the water stop wall 704. And a tubular water-stop coating 705 that covers the connection portion of the electric wire 702 and the terminal 703.
- the electric wire 702 includes a single core wire 721 formed by twisting a plurality of fine metal wires, and an insulating layer 722 made of a synthetic resin that covers the outer periphery of the core wire 721.
- the material constituting the core wire 721 include copper, a copper alloy, aluminum, an aluminum alloy, and the like, and are appropriately selected from arbitrary metal materials as necessary.
- aluminum or an aluminum alloy is used as the material of the core wire 721.
- the insulating layer 722 at the end portion of the electric wire 702 is removed. Therefore, the end portion of the core wire 721 is not covered with the insulating layer 722 and is exposed.
- the core wire 721 may be a single core wire.
- the terminal 703 is a so-called female type, and is connected to a mating male terminal (not shown).
- the terminal 703 is obtained by, for example, pressing a metal plate material into a predetermined shape.
- the metal material constituting the terminal 703 include copper, copper alloy, and the like, and are appropriately selected from arbitrary metal materials as necessary.
- a plating layer (not shown) is formed on the surface of the metal plate constituting the terminal 703 of the present embodiment.
- a metal which comprises a plating layer tin, nickel, etc. are mentioned, for example, It selects suitably from arbitrary metal materials as needed.
- a tin plating layer is formed on the surface of the metal material (copper or copper alloy) constituting the terminal 703.
- a metal plate material on which no plating layer is formed may be used as the material for the terminal 703.
- the terminal 703 includes a bottom plate 731, a wire barrel 732, a tip portion 733, an insulation barrel 734, and a protrusion 738.
- the bottom plate 731 has a shape extending along the axial direction of the electric wire 702 with both edges standing so that a groove 735 is formed inside.
- the bottom plate 731 has a curved bottom surface and a substantially U-shaped cross section.
- the exposed end portion of the core wire 721 of the electric wire 702 and the base insulating layer 722 of the core wire 721 are both placed on the bottom plate 731 so as to fit in the groove 735.
- a portion (region) 736 where the core wire 721 is not placed is provided on the front side of the bottom plate 731. That is, the exposed end portion of the core wire 721 is placed so that there is room (space) on the front side of the bottom plate 731.
- this portion 736 is particularly referred to as a blank portion.
- a water blocking wall 704 is provided in a part of this room portion 736.
- a pair of wire barrels 732 facing each other are provided on both edges of the bottom plate 731 where the core wire 721 is placed.
- the wire barrel 732 has a plate-like shape, and is provided so as to rise from both edges of the bottom plate 731 before the terminal 703 is attached to the electric wire 702.
- the wire barrel 732 is crimped (crimped) to the core wire 721 so as to hold the core wire 721 on the bottom plate 731.
- a pair of insulation barrels 734 facing each other are provided on both edges of the bottom plate 731 where the base insulating layer 722 is placed.
- the insulation barrel 734 has a plate shape narrower than the wire barrel 732, and rises from both edges of the bottom plate 731 before the terminal 703 is attached to the electric wire 702, like the wire barrel 732. Is provided.
- the insulation barrel 734 is pressure-bonded (crimped) to the insulating layer 722 so as to hold the base insulating layer 722 mounted on the bottom plate 731.
- the distal end portion 733 has a cylindrical connecting tube portion 781 that extends to the front side of the bottom plate 731 and has a substantially square cross section.
- An elastic contact piece 782 (see FIG. 81) that elastically contacts a mating male terminal (not shown) is provided in the connection cylinder portion 781.
- the protrusions 738 are provided so as to elongate so as to stand upright on both edges of the bottom plate 731 in the room portion 736. These protrusions 738 are both sharply pointed and set to substantially the same height.
- the height of the protrusion 738 is appropriately set in consideration of the size (inner diameter) of the cylindrical water-stop coating that covers the terminal 703.
- the protrusion 738 is provided in the marginal part 736 at the edge part on the front side (tip part 733 side) from the place where the water blocking wall 704 is erected.
- the protrusion 738 is configured to pierce the peripheral edge (opening end 751) of the water blocking coating 705 from the inside to the outside. In this way, the protrusion 738 pierces the water-stopping coating 705 so that the water-stopping coating 705 is positioned with respect to the terminal 703 and the like.
- the protruding portion 738 is bent (folded) so as to press the water-stopping coating 705 from the top using a predetermined jig (not shown) while the water-stopping coating 705 is pierced. As shown in FIG. 73 and the like, the protrusions 738 are folded toward the inside of the bottom plate 731 so as to approach each other from both edge sides. By being folded down in this way, the waterproof coating 705 is prevented from being displaced (disengaged) from the protrusion 738 and displaced. Further, the protrusion 738 is restrained from being caught unnecessarily with respect to surrounding objects.
- the water blocking wall 704 is manufactured using a resin processed product 741 processed into a predetermined shape as shown in FIG.
- the resin processed product 741 of the present embodiment has a substantially cylindrical shape, and is processed into a shape that fits inside the bottom plate 731 in the room portion 736.
- the resin material used for the resin processed product 741 include a metal-adhesive elastomer (trade name: Perprene (registered trademark), Toyobo Co., Ltd.). This resin material has moderate rigidity (elasticity) and exhibits adhesiveness to a metal by heat treatment.
- thermoplastic adhesive has adhesiveness to the metal.
- the melting point of the base material portion in the resin material is about 170 ° C.
- the melting point of the portion that exudes as described above is about 120 ° C.
- the resin processed product 741 has no adhesiveness to metal and is easy to handle.
- Such a resin processed product 741 is obtained, for example, by extruding the resin material into an elongated cylindrical molded product using an extrusion molding apparatus and cutting the molded product into a predetermined size.
- the resin processed product 741 is fitted inside the bottom plate 731 (that is, the groove 735) in the room portion 736.
- the width of the groove 735 in the bottom plate 731 (the margin portion 736) is set to be slightly smaller than the diameter of the resin processed product 741 having a substantially circular cross section.
- the resin workpiece 741 is fitted (press-fit) and attached to the inside (groove 735) of the bottom plate 731 set to such a width (groove width).
- the resin processed product 741 attached in this manner is erected so as to close the groove 735 inside the bottom plate 731.
- the resin processed product 741 has moderate elasticity, and is in close contact with the inner surface 791 of the bottom plate 731 so as to push back from the inside to the outside of the bottom plate 731.
- the operation of attaching the resin processed product 741 to the terminal 703 may be performed before attaching the electric wire 702 to the terminal 703 or after attaching the electric wire 702 to the terminal 703.
- the resin processed product 741 fitted inside the bottom plate 731 in the room portion 736 is then heat-treated (first heat-treated) together with the terminals 703.
- This heat treatment is performed in order to bring the outer peripheral surface 742 of the resin processed product 741 into close contact with the inner surface (metal surface) 361 of the bottom plate 731 in the margin portion 736.
- a molten resin material thermoplastic adhesive
- the oozing resin material enters between the outer peripheral surface 742 of the resin processed product 741 and the inner surface 791 of the bottom plate 731 during the heat treatment, and liquid-tightly seals between them.
- the liquid resin material cools and hardens.
- the resin processed product 741 is fixed in close contact with the bottom plate 731 without a gap, and becomes a water blocking wall 704.
- the water-stop coating 705 has a tubular shape (tube shape) and is covered to surround the terminal 703 on the rear side from the margin portion 736 together with the insulating layer 722 at the base of the exposed core wire 721. That is, the opening end (peripheral part) 51 on the front side of the water blocking coating 705 is disposed on the front side of the water blocking wall 704. As described above, the protruding portion 738 of the terminal 703 is pierced from the inner side to the outer side at the opening end portion (peripheral portion) 751 of the waterproof coating 705.
- the water blocking wall 704 is completely accommodated in the water blocking coating 705.
- the outer surface (outer peripheral surface) of the portion of the water blocking wall 704 that protrudes from the groove 735 is in close contact with the inner surface (inner peripheral surface) of the water blocking coating 705.
- the outer surface of the bottom plate 731 that supports and supports the water blocking wall 704 is in close contact with the inner surface of the water blocking coating 705.
- the opening end 752 on the rear side of the water blocking coating 705 is in close contact with the insulating layer 722 so as to surround the insulating layer 722 at the base of the core wire 721 (the end of the insulating layer 722).
- the water blocking coating 705 is in close contact so that the connection portion between the terminal 703 and the electric wire 702 is tightened from the outside. That is, the tubular water-stop coating 705 provides a water-stop wall 704, an exposed core wire 721, and a terminal 703 on the rear side of the portion where the water-stop wall 704 is provided (that is, the wire barrel 732, the insulation). The barrel 734, the bottom plate 731) and the end of the insulating layer 722 are covered so as to be surrounded.
- the water-stop coating 705 of the present embodiment is made of a so-called heat shrinkable tube and made of a synthetic resin material that shrinks by heat treatment (second heat treatment). Note that an adhesive layer or an adhesive layer (not shown) is formed on the inner peripheral surface (inner surface) of the water blocking coating 705.
- the adhesive layer or the pressure-sensitive adhesive layer develops adhesiveness or tackiness by being heated and softened or melted.
- the adhesive or pressure-sensitive adhesive used for the adhesive layer or the pressure-sensitive adhesive layer a known one used in this type of electric wire with terminal 701 can be applied. In another embodiment, the adhesive layer or the pressure-sensitive adhesive layer may not be provided on the inner peripheral surface of the water blocking coating 705.
- a metal plate material is punched to form a carrier 770 having a strip shape and a plurality of terminal pieces 730 connected to the side edges of the carrier 770. That is, the plurality of terminal pieces 730 are collectively connected to the carrier 770.
- the carrier 770 is formed with feed holes 771 arranged at substantially equal intervals along the longitudinal direction. As the feed hole 771, a substantially circular shape and a substantially rectangular shape are alternately arranged. The feed hole 771 is set so that a feed claw (not shown) provided in a processing machine (not shown) is engaged.
- a plurality of terminal pieces 730 are connected to the carrier 770 so as to be arranged at substantially equal intervals along the longitudinal direction.
- the terminal piece 730 has a flat plate shape, and is provided so as to correspond to each part (the bottom plate 731, the wire barrel 732, the insulation barrel 734, the tip end portion 733, and the protruding portion 738) constituting the terminal 703. It has been.
- a plurality of recesses 737 may be formed on the bottom plate 731 where the wire barrel 732 is extended.
- the concave portion 737 has a substantially quadrangular shape (substantially parallelogram shape), a pair of first sides substantially perpendicular to the extending direction of the core wire 721 (electric wire 702), and the extending direction of the core wire 721 (electric wire 702) from 90 °. Also comprises a pair of second sides that intersect at a small angle.
- the adjacent recesses 737 are arranged such that the first sides are arranged in a straight line and the second sides are arranged in a straight line.
- Such a recess 737 can increase the fixing force between the wire barrel 732 and the core wire 721 while suppressing a decrease in the electric resistance value.
- these recesses 737 may be formed in a process different from the punching process.
- the terminal piece 703 is three-dimensionally shaped to be a terminal 703 as shown in FIG.
- a resin processed product 741 (see FIG. 76 and the like) that has been processed in advance into a predetermined shape is press-fitted (inserted) into the inner side (groove 735) by an assembly machine.
- the resin processed product 741 is formed by extruding a predetermined resin material having adhesiveness to a metal into an elongated cylindrical molded product using an extrusion molding apparatus, and the molded product is formed into a predetermined shape (that is, the room).
- the terminal piece 730 (terminal 703) in which the resin processed product 741 is fitted is subjected to a heat treatment step (first heat treatment step).
- a thermoplastic adhesive having adhesiveness to the metal oozes out from the resin processed product 741, and the resin processed product 741 is spaced from the bottom plate 731 by the oozed thermoplastic adhesive. Adhere closely.
- the terminal pieces 730 (terminals 703) in which the resin processed product 741 is fitted are sequentially sent into the heating device 706. While passing through the heating device 706, the heat treatment process is performed. In this manner, the heat treatment process is continuously performed on the plurality of terminal pieces 730 (terminals 703).
- the terminal piece 730 (terminal 703) after the heat treatment process has the end portion of the electric wire 702 placed on the bottom plate 731 (see FIG. 80).
- the insulating layer 722 is removed from the terminal portion of the electric wire 702 so that the core wire 721 is exposed in advance.
- the exposed core wire 721 is placed on the bottom plate 731 where the wire barrel 732 is formed.
- the base insulating layer 722 (end portion of the insulating layer) of the core wire 721 is placed on the bottom plate 731 where the insulation barrel 734 is formed.
- there is a margin portion 736 on the front side of the core wire 721 and a water blocking wall 704 is erected on the bottom plate 731 in the margin portion 736 (see FIG. 81).
- projections 738 are arranged on both edges of the bottom plate 731 respectively.
- the wire barrel 732 and the insulation barrel 734 of the terminal 703 are crimped by using a crimping device (not shown). Process).
- the wire barrel 732 is crimped to the core wire 721, and the insulation barrel 734 is crimped to the end of the insulating layer 722 (see FIG. 82).
- the pair of insulation barrels 734 are pressure-bonded in a state where the front sides are overlapped.
- a cutting process for separating the terminal piece 730 from the carrier 770 is performed at the same time.
- the terminal 703 is thus crimped to the electric wire 702 and the terminal 703 (terminal piece 730) is separated from the carrier 770, the electric wire 702 having the terminal 703 attached to the end is obtained (see FIG. 82).
- an unheated cylindrical water-stop coating 705 made of a heat-shrinkable tube is placed so as to surround the connection portion between the electric wire 702 and the terminal 703.
- the opening end 751 on the front side of the water blocking coating 705 is disposed so as to cover the protrusion 738.
- the water blocking coating 705 may be inserted and covered from the terminal 703 side, or may be inserted and covered from the electric wire 702 side.
- the inner diameter of the waterproof coating (heat-shrinkable tube) 5 in an unheated state is set to be larger than the connection portion between the electric wire 702 and the terminal 703.
- the peripheral edge (opening end 751) of the waterproof coating 705 is pushed down, and the portion is pierced by the protrusion 738.
- the protruding portion 738 pierces the water-stop coating 705 so that the water-stop coating 705 is positioned with respect to the terminal 703 and the like.
- the position of the water stop coating 705 is appropriately set in consideration of the amount of heat shrinkage.
- the protrusion 738 is folded down so as to press the water-stop coating 705 from above.
- a force is applied to the protrusion 738 using a predetermined jig (not shown).
- the electric wire 702 and the terminal 703 covered with the heat-shrinkable tube (water-stop coating) 5 are subjected to a heat treatment step (second heating) in a heating device (not shown). Processing step).
- the water-stop coating 705 made of the heat-shrinkable tube is thermally contracted, and an adhesive layer (not shown) formed on the inner peripheral surface of the water-stop coating 705 develops adhesiveness.
- the inner surface (inner peripheral surface) of the water blocking coating 705 is in close contact with the connection portion of the electric wire 702 and the terminal 703 with no gap corresponding to the surface shape (see FIG. 75 and the like).
- the terminal-attached electric wire 701 in which the connecting portion is surrounded by the cylindrical water-stop coating 705 is obtained. Since the electric wire 1 obtained in this way includes the water blocking wall 704 and the water blocking coating 705, it is excellent in waterproofness. In particular, even if water is transmitted from the front side (tip portion 733 side) of the terminal 703, the water blocking wall 704 is erected in the groove 735 on the front side (excess portion 736) of the bottom portion 731. Since the water wall 704 and the bottom plate 731 of the portion that supports the water blocking wall 704 are surrounded by the water blocking coating 705 (open end 751), water enters the rear side of the water blocking wall 704. It is suppressed.
- the cylindrical water-stop coating 705 made of a heat-shrinkable tube is positioned (temporarily fixed) by the protrusion 738 before the heat treatment step (second heat treatment step), the heat-shrinkable tube is displaced. In addition, detachment of the heat-shrinkable tube is suppressed. Further, since the protruding portion 738 is folded as described above, the protruding portion 738 is restrained from being caught unnecessarily with respect to surrounding objects.
- Embodiment 7-2 With reference to FIG. 88, an electric wire with terminal 701A according to Embodiment 7-2 will be described.
- the basic structure of the electric wire with terminal 701A of the present embodiment is the same as the electric wire with terminal 701 of the embodiment 7-1. Therefore, the same reference numerals are assigned to the same structures, and detailed descriptions thereof are omitted.
- the electric wire with terminal 701A of the present embodiment is different from that of the embodiment 7-1 in that the water blocking wall 704A is provided by molding (resin mold) on the bottom plate 731 of the terminal 703. Yes.
- the water blocking wall 704A is provided so as to wrap the bottom plate 731 in the margin portion 736.
- the water blocking wall 704 ⁇ / b> A has a substantially circular shape when viewed from the axial direction of the electric wire 702, and the outer peripheral surface thereof is in close contact with the inner peripheral surface of the water blocking coating 705.
- the electric wire with terminal of the present invention may be provided with the water blocking wall 704A having such a configuration.
- FIG. 89 shows a terminal 703A used in this embodiment.
- This terminal 703A is provided with a guide portion 739 in addition to the terminal 703 of the embodiment 7-1.
- the guide portion 739 protrudes from both edges of the bottom plate 731 in the margin portion 736 of the terminal 703A so as to be adjacent to the rear side of the protruding portion 738.
- These guide portions 739 are elongated from the edge so as to incline toward the tip of the projection portion 738. As shown in FIG.
- the root of the guide portion 739 and the root of the projection 738 are separated from each other, and the tip of the guide 739 is disposed so as to be close to the tip of the projection 738.
- the height of the guide portion 739 is set to be substantially the same as the height of the protruding portion 738.
- the guide portion 739 is provided, for example, when the terminal 703A is formed by punching a metal plate material.
- the guide part 739 is used when moving the opening end 751 (peripheral part) on the front side of the water blocking coating 705 to the tip of the protrusion 738 (see FIG. 90).
- the inner diameter of the water blocking coating 705 is set to be relatively small, it may be difficult to lift the peripheral edge (opening end 751) and place (cover) it on the tip of the protrusion 738.
- the guide portion 739 is provided on the terminal 703A as in the present embodiment, the waterproof coating 705 can move so as to travel on the inclined guide portion 739, and is guided to the tip of the protruding portion 738. It is burned. Therefore, by providing the guide portion 739, the peripheral edge portion of the water blocking coating 705 can be easily covered with the projection portion 738.
- the guide portion 739 is pressed from above the water-stop coating 705, and the guide portion is formed in the water-stop cover 705. 739 may be pushed down.
- the jig 707 is made of a metal bar set to a predetermined width (size) and simultaneously presses two guide portions 739 provided on both edges of the terminal 703A. The pressed guide portion 739 is bent from the base toward the groove 735 of the terminal 703A.
- the guide part 739 when the guide part 739 is folded down in the cylindrical water stop coating 705, the guide part 739 pushes up the water stop cover 705 (in some cases, breaks through the water stop cover 705), Protruding to the outside of the waterproof coating 705 is suppressed. Moreover, it is also suppressed that the outer diameter of the water-stop coating 705 in the portion covering the guide portion 739 is increased. In other embodiments, the guide portion 739 may not be finally folded.
- the water stop coating 705 on the protrusion part 738 is also pushed down by the jig 707.
- the sharp tip of the projection 738 pierces (pierces) the peripheral edge (opening end 751) of the water blocking coating 705.
- the protruding portion 738 positions the water blocking coating 705 by piercing the water blocking coating 705 as in the case of the embodiment 7-1. Further, the protruding portion 738 in the state where the water-stopping coating 705 is pierced is folded down so as to press the water-stopping coating 705 from above as in the case of the embodiment 7-1.
- the water-stop coating 705 made of a heat-shrinkable tube is heat-treated to obtain a terminal-attached electric wire 701A in which the connection portion between the terminal 703A and the electric wire 702 is covered with the water-stop coating 705 as shown in FIG. It is done.
- one protrusion 738 is provided on each edge of the bottom plate 731 in the room portion 736.
- the protrusion 738 is only on one edge. May be provided.
- the protrusion 738 was folded after piercing the water blocking coating 705.
- the protrusion 738 may be left as it is without being folded.
- the front side portion exposed from the water blocking coating 705 may be cut off with a tool such as a nipper.
- the terminal 703 includes the insulation barrel 734. However, in other embodiments, the terminal 703 may not include the insulation barrel 734.
- the opening end 752 on the rear side of the water blocking coating 705 is in close contact with the insulating layer 722, but in other embodiments, for example, it is fitted over the electric wire 702.
- the open end 752 may be brought into close contact with the resin ring.
- the terminal 703 is a so-called female type.
- the terminal 703 may be a male type or a round type terminal (so-called LA terminal). Good. That is, the shape of the terminal 703 may be appropriately selected depending on the purpose.
- the shape of the water blocking wall 704 (resin processed product 741) is a columnar shape, but in other embodiments, the cross section is a columnar shape such as an elliptical shape, an oval shape, or a rectangular shape. It may be a thing. That is, the shape of the water blocking wall 704 may be appropriately selected according to the inner shape of the bottom plate 731 in the terminal 703.
- the water-stop coating 705 is formed in a cylindrical shape in advance, but in other embodiments, for example, a sheet-like water-stop tape is used as the electric wire 702 and You may use what was wound around the connection part of the said terminal 703, and was formed in the cylinder shape.
- a heat treatment for bringing the water blocking wall 704 (resin processed product 741) into close contact with the bottom plate 731 of the terminal 703, and a water blocking coating 705 made of a heat shrinkable tube.
- the heat treatment (second heat treatment) for causing heat shrinkage is performed separately, in other embodiments, these heat treatment steps may be performed simultaneously.
- the crimping process for crimping the terminal 703 to the electric wire 702 and the cutting process for separating the terminal piece 730 (terminal 703) from the carrier are performed simultaneously.
- the said cutting process may be performed before performing the said crimping process, and the said crimping process may be performed after performing the said cutting process.
- a heat-shrinkable tube is used as the waterproof coating 705.
- a tubular member having elasticity such as a rubber tube is used as the waterproof coating 705. May be.
- the resin processed product 741 is manufactured by extruding a predetermined resin material.
- the resin material is sheeted using a T-die. It is possible to manufacture a resin processed product having a predetermined shape by molding into a shape (sheet molding) and punching the sheet-shaped molded product.
- the anti-metal good adhesion elastomer was used as the material of the water blocking wall 704 (resin processed product 741).
- polybutylene terephthalate, polyethylene terephthalate What is necessary is just to select suitably from well-known resin materials, such as polyamide and a polypropylene, according to the objective (for example, the required water stop performance of the water stop wall).
- the terminal-attached electric wire includes a core wire, an electric wire having an insulating layer covering the outer periphery of the core wire so that a terminal end of the core wire is exposed, and both ends so that a groove can be formed inside.
- a bottom plate on which the end of the core wire is placed so as to extend along the axial direction with an edge standing and a margin portion is formed on the front side, a pair of wire barrels extending on both edges of the bottom plate, and a tip of the bottom plate
- a terminal-attached electric wire provided with a tubular water-stop covering for enclosing the rear terminal with the exposed insulating layer at the base of the core wire, on both edges of the bottom plate of the margin portion Elongate to stand up It has a Vita protrusion, the protrusion, characterized in that pierce the waterproofing coating.
- the electric wire with a terminal has protrusions that are elongated so as to stand upright on both edges of the bottom plate of the margin portion, and the protrusions pierce the water blocking coating. Is positioned using the protrusion.
- the protrusion is folded down so as to press down the water blocking coating in a state where the water blocking coating is pierced.
- the said water stop coating remove
- the protrusion is prevented from being caught unnecessarily with respect to surrounding objects.
- the terminal has guide portions that are adjacent to the rear side of the protruding portion and are inclined toward the tip of the protruding portion on both edges of the bottom plate of the margin portion.
- the guide portion is provided in this way, it is easy to guide the waterproof coating to the tip of the protrusion.
- the guide portion is folded down in the water blocking coating.
- the guide part when the guide part is folded down in the waterproof coating, it is suppressed that the guide part protrudes to the outside of the waterproof coating, and an increase in outer diameter is also suppressed.
- the room portion of the terminal is provided with a water blocking wall that closes the groove and is accommodated in the water blocking coating and whose outer surface is in close contact with the inner surface of the water blocking coating. .
- a water stop wall When such a water stop wall is provided, the water that travels from the front side of the terminal is blocked by the water stop wall. Therefore, water can be prevented from entering the connecting portion between the terminal and the electric wire.
- the terminal may include an insulation barrel that holds the insulating layer of the electric wire.
- the metal constituting the core wire and the metal constituting the terminal may be different from each other.
- an adhesive layer or an adhesive layer is formed on the inner peripheral surface of the waterproof coating.
- the adhesive layer or the pressure-sensitive adhesive layer is formed on the inner peripheral surface as described above, the water blocking coating can be easily adhered to the connection portion of the electric wire and the terminal.
- the water stop coating may be composed of a heat shrinkable tube.
- the terminal according to the technique disclosed in the present specification is attached to the end of an electric wire having a core wire and an insulating layer covering the outer periphery of the core wire so that the end of the core wire is exposed, and is connected to the electric wire.
- the terminal is covered with a cylindrical water-stop coating, and extends along the axial direction with both edges standing so that a groove is formed on the inside, and the end of the core wire is placed on the front side so that a blank portion is formed.
- a pair of wire barrels that are crimped to the core wire so as to hold the core wire on the bottom plate, and are extended to the front side of the bottom plate and connected to the mating side.
- a protruding portion that is elongated so as to stand on both edges of the bottom plate of the margin portion.
- the waterproof coating can be positioned using the protrusions.
- the terminal has a guide portion that is provided on both edges of the bottom plate of the margin portion so as to be adjacent to the rear side of the projection portion and is inclined toward the projection portion.
- the guide portion is provided in this way, it is easy to guide the waterproof coating to the tip of the protrusion.
Landscapes
- Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Abstract
Description
11…電線
12…雌端子(端子)
13…芯線
14…絶縁被覆
15…底板
17…ワイヤーバレル
19…溝部
22、52…止水壁
23…樹脂リング
24…熱収縮チューブ
25…止水被覆
26…キャリア
27…端子片
40、51…延出部
41…連鎖端子
50…雄端子(端子)
70…弾性体
80…止水テープ
210,230,240…端子付き電線
211…電線
212…雌端子(端子)
213…芯線
214…絶縁被覆
217…ワイヤバレル
219…繋ぎ部
219A…底板
219B…側板
220…接続部
222,241…止水壁
223…樹脂リング
224…熱収縮チューブ(止水被覆)
225,231…連設部
225C…傾斜面(案内面)
3A…端子付き電線
310…電線
311…芯線
312…絶縁被覆
320…雌端子(端子)
321…接続筒部(接続部)
324…繋ぎ部
326…ワイヤバレル
330…止水壁
332…当て板(当て部)
334…連結部
335…周壁
336…薄膜(当て部)
338…突条(当て部)
410…端子付き電線
411…電線
412…雌端子(端子)
413…芯線
414…絶縁被覆
415…底板
417…ワイヤーバレル
419…延出部
419A…凸部
419B…孔部
419C…(延出部の)端面
419D…(延出部の)端部
419F…凹み部
422…止水壁
423…樹脂リング
424…熱収縮チューブ
425…止水被覆
427…端子片
X,Y,Z…腐食経路
510…端子付き電線
511…電線
512…雌端子(端子)
513…芯線
514…絶縁被覆
517…ワイヤバレル
519,551…繋ぎ部
520…接続部
522…止水壁
523…樹脂リング
524…熱収縮チューブ(止水被覆)
530…境界面
536,563…内側境界面(境界面のうち芯線が配置される側の面)
537,561…外側境界面(反対側の面)
540,550,560,570…凹凸部
541,562…溝部
541A…内側溝部(芯線が配置される側の面に形成された溝部)
541B…外側溝部(反対側の面に形成された溝部)
610…端子付き電線
611…電線
612…雌端子(端子)
613…芯線
614…絶縁被覆
615…底板
617…ワイヤーバレル
619…延出部
622…止水壁
623…樹脂リング
624…熱収縮チューブ
625…止水被覆
626…キャリア
627…端子片
629…径大部
630…コネクタ
631…コネクタハウジング
632…キャビティ
633…前止まり壁
634…通し孔
639A,639B…径小部
640…雄コネクタ(相手側コネクタ)
641…コネクタハウジング
642…雄端子
701,701A,701B…端子付き電線
702…電線
721…芯線
722…絶縁層
703,703A…端子
731…底板
732…ワイヤーバレル
733…先端部
734…インシュレーションバレル
735…溝
736…余地部分
737…凹部
738…突起部
739…案内部
704…止水壁
705…止水被覆(熱収縮チューブ)
本発明の実施形態1-1に係る端子付き電線10を、図1ないし図5を参照しつつ説明する。本実施形態に係る端子付き電線10は、電線11の端末に雌端子12(端子に相当)が接続されてなる。
電線11は、複数の金属細線を撚り合せてなる1つの芯線13と、芯線13の外周を被覆する合成樹脂製の絶縁被覆14と、を備える。芯線13は、銅、銅合金、アルミニウム、アルミニウム合金等、必要に応じて任意の金属から構成される。本実施形態においては、アルミニウム又はアルミニウム合金が用いられている。電線11の端末においては、絶縁被覆14が剥離されることにより、芯線13が露出している。なお、芯線13は単芯線でもよい。
雌端子12は金属板材を所定形状のプレス加工して形成される。雌端子12を構成する金属としては、銅、銅合金等、必要に応じて任意の金属を採用しうる。また、金属板材の表面には図示しないメッキ層が形成されている。メッキ層を構成する金属としては、スズ、ニッケル等、必要に応じて任意の金属を採用しうる。本実施形態においては、銅又は銅合金の表面にスズメッキ層が形成されている。なお、金属板材の表面にメッキ層を形成しない構成としてもよい。
溝部19には、合成樹脂材をモールド成形することにより止水壁22が形成されている。止水壁22を形成する合成樹脂材としては、ポリアミド、ポリエステル、ポリプロピレン、ポリエチレン等の熱可塑性樹脂を用いてもよく、また、エポキシ樹脂等の熱硬化製樹脂を用いてもよく、必要に応じて任意の合成樹脂材を用いることができる。上記の合成樹脂材は、1種類のみを用いてもよく、また、複数種類の合成樹脂材を混合して用いてもよい。本実施形態においては、ポリアミド系熱可塑性樹脂が用いられている。
電線11の端部には合成樹脂製の樹脂リング23が外嵌されている。詳細には、絶縁被覆14の端部であって、インシュレーションバレル16が圧着された部分よりも後方(露出した芯線13と反対方向)の位置に、断面形状が円形状をなす樹脂リング23が外嵌されている。樹脂リング23の内径は絶縁被覆14の外径と略同じに設定されている。これにより、樹脂リング23は、電線11の端部に、容易に外嵌させることができるようになっている。なお、略同じとは、樹脂リング23の内径が絶縁被覆14の外径と同じ場合と、樹脂リング23の内径が絶縁被覆14の外径よりもやや大きい場合と、樹脂リング23の内径が絶縁被覆14の外形よりもやや小さい場合と、を含む。
止水壁22と絶縁被覆14の端部との間に亘って、芯線13を覆う筒状の止水被覆25が設けられている。詳細には、溝部19のうち止水壁22が形成された部分から、芯線13、ワイヤーバレル17、インシュレーションバレル16、樹脂リング23が外嵌された部分、更に、樹脂リング23を越えて絶縁被覆14の端部に至るまでの領域は、合成樹脂材からなる止水被覆25によって被覆されている。本実施形態においては、止水被覆25は熱収縮チューブ24からなる。本実施形態においては、熱収縮チューブ24の内面には、図示しない接着層又は粘着層が形成されている。接着層又は粘着層は、加熱されて軟化又は溶融することにより、接着性又は粘着性が発現するようになっている。なお、熱収縮チューブ24の内面に接着層又は粘着層を設けない構成としてもよい。熱収縮チューブ24の長さ寸法は、止水壁22から樹脂リング23に至る領域の長さ寸法よりも長く設定されている。
続いて、本実施形態に係る端子付き電線10の製造工程の一例を示す。まず、金属板材に打ち抜き工程を実行することにより、帯状をなすキャリア26と、このキャリア26の側縁に連結された複数の端子片27と、を形成する。キャリア26には、長手方向に沿って略等間隔に並ぶ送り孔28が形成されている。この送り孔28には、加工機に設けられた図示しない送り爪が係合するようになっている。
続いて、本実施形態の作用、効果について説明する。本実施形態によれば、ワイヤーバレル17の底板15から延出された延出部40には止水壁22が形成されている。本実施形態においては、延出部40は溝部19とされており、止水壁22は溝部19内に充填して形成されている。これにより、溝部19から水が浸入して、芯線13及びワイヤーバレル17に水が付着することを抑制できる。更に、止水壁22の外周面は、熱収縮チューブ24の内面と、全周に亘って隙間なく密着しているので、止水壁22と熱収縮チューブ24との間から水が浸入することも抑制される。これにより、溝部19のうち止水壁22が形成された部分から、ワイヤーバレル17、インシュレーションバレル16、樹脂リング23が外嵌された部分、更に、樹脂リング23を越えて絶縁被覆14に至るまでの領域は、熱収縮チューブ24によって止水されるので、芯線13及びワイヤーバレル17に水が付着することを確実に抑制できる。
次に、本発明の実施形態1-2を、図6を参照しつつ説明する。本実施形態においては、止水壁22は、溝部19の内部に充填された形態とされており、溝部19の外周を覆う形態にはなっていない。また、止水壁22は、溝部19を構成する側端縁よりも上方に盛り上がって形成されている。熱収縮チューブ24の内面は、止水壁22と隙間なく密着すると共に、溝部19の外周面と隙間なく密着している。上記以外の構成については、実施形態1-1と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
次に、本発明の実施形態1-3について図7を参照しつつ説明する。本実施形態においては、樹脂リング23が省略されている。熱収縮チューブ24は、溝部19のうち止水壁22が形成された部分から、ワイヤーバレル17、インシュレーションバレル16、及び絶縁被覆14の端部に至るまでの領域が被覆されている。熱収縮チューブ24の内面は、絶縁被覆14の外面と密着している。上記以外の構成については、実施形態1-1と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
本実施形態においては、止水被覆25として、ゴム弾性を有する弾性チューブが用いられる。自然状態における弾性チューブの内径は、止水壁22の外径及び絶縁被覆14の外径よりも小さくなるように設定されている。上記以外の構成については、実施形態1-3と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
続いて、本発明の実施形態1-5について、図8及び図9を参照しつつ説明する。本実施形態に係る端子は、雄端子50とされる。本実施形態においては、底板15から延出される延出部51は平板状をなしている。止水壁52は、延出部51を全周に亘って覆うように形成されている。止水壁52の断面形状は、四隅が丸められた四角形状をなしている。延出部51から芯線13の延びる方向には、雄タブ53が延出されている。この雄タブ53が、図示しない相手側端子と電気的に接続される。
続いて、本発明の実施形態1-6について、図10及び図11を参照しつつ説明する。本実施形態においては、絶縁被覆14の端部には、筒状をなすゴム製の弾性体70が外嵌されている。弾性体70の内面は、絶縁被覆14の外面と密着している。また、弾性体70の外面は、止水被覆25の内面と密着している。
続いて、本発明の実施形態1-7について、図12を参照しつつ説明する。本実施形態においては、絶縁被覆14の端部に配された弾性体70の外側には、インシュレーションバレル16が巻き付くように圧着されている。上記以外の構成については、実施形態1-7と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
続いて、本発明の実施形態1-8について、図13及び図14を参照しつつ説明する。本実施形態においては、止水被覆25は、シート状をなす止水テープ80を、止水壁22から絶縁被覆14の端部に至る領域に巻回することにより、全体として筒状をなす形態とされる。止水テープ80としては、図示しない粘着剤層が形成された粘着テープ、又は、図示しない接着剤層が形成された接着テープを用いることができる。止水テープ80は、接着剤層又は粘着剤層を内側にして巻回される。また、止水テープ80としては、公知の自己融着テープを用いることができる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)端子としては、延出部40に連なって円板状の接続部を形成し、この接続部に貫通孔が形成された、いわゆるLA端子であってもよく、必要に応じて任意の形状の端子とすることができる。
本明細書に開示された技術は、芯線の外周を絶縁被覆で被覆してなる電線に端子が接続されてなる端子付き電線であって、前記端子が、前記絶縁被覆の端部から露出された前記芯線が載置された底板を有すると共に前記芯線に圧着されたワイヤーバレルと、前記底板から延びる延出部と、を備えて構成され、前記延出部に合成樹脂材をモールドしてなる止水壁が設けられ、前記止水壁の外面に密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられている。
前記止水壁は、前記延出部の外周を全周に亘って包囲するように形成されていることが好ましい。
前記延出部のうち前記芯線側の面を凹形状に曲げ加工することにより溝部を形成する曲げ工程を実行し、前記モールド工程において前記溝部内に前記合成樹脂材を充填することが好ましい。
本明細書に開示された技術によれば、端子及び端子付き電線の防水性を向上させることができる。
従来、端子付き電線として2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁被覆で被覆してなる電線と、絶縁被覆から露出する芯線に接続された端子と、を備える。端子は、芯線が載置された平板状の基板部と、この基板部から突出されると共に芯線に圧着されたワイヤバレルと、を備える。
本実施形態に係る端子付き電線210は、電線211と、この電線211の端末に接続された雌端子212(端子に相当)と、を備える。
電線211は、複数の金属細線を撚り合せてなる芯線213と、芯線213の外周を被覆する合成樹脂製の絶縁被覆214と、を備える。芯線213は、銅、銅合金、アルミニウム、アルミニウム合金等、必要に応じて任意の金属から構成される。本実施形態においては、アルミニウム又はアルミニウム合金が用いられている。電線211の端末においては、図17に示すように、絶縁被覆214が剥離されることにより、芯線213が露出している。なお、芯線213は単芯線でもよい。
雌端子212は、図15に示すように、角筒状の接続部220と、接続部220の後方に繋ぎ部219を介して形成されたワイヤバレル217と、ワイヤバレル217の更に後方に位置するインシュレーションバレル216と備えて構成されている。
雌端子212は金属板材を所定形状にプレス加工して形成されている。
接続部220は、その内部に接続部220の前方から挿入される図示しない雄型端子に弾性的に接続可能な弾性接触片221が設けられている。
また、圧着に伴って複数の凹部218の口縁が芯線213の表面に摺接するので、凹部218の口縁が芯線213の表面に形成された絶縁性の酸化被膜等を突き破って芯線213に接触することになる。したがって、凹部218の口縁と芯線213との接触面積が大きくなる結果、雌端子212と芯線213との電気抵抗値を低くすることができる。
このインシュレーションバレル216は、図17に示すように、電線211の絶縁被覆214が第二底板216Aに載置された状態で、絶縁被覆214の外側から抱くようにして、いわゆるオーバーラップ型に絶縁被覆214にかしめ圧着されるようになっている。
雌端子212を構成する金属としては、銅、銅合金等、必要に応じて任意の金属を採用しうる。また、金属板材の表面には図示しないメッキ層が形成されている。メッキ層を構成する金属としては、スズ、ニッケル等、必要に応じて任意の金属を採用しうる。本実施形態においては、銅又は銅合金の表面にスズメッキ層が形成されている。なお、金属板材の表面にメッキ層を形成しない構成としてもよい。
繋ぎ部219は、図18に示すように、芯線213が載置された側の上面が凹形状に曲げ加工され、断面形状が略U字状をなしている。繋ぎ部219は、接続部220から後方に延出された底板219Aと、底板219Aの両側縁から上方に向かって立ち上る一対の側板219B,219Bとから構成されている。両側板219B,219Bは、それぞれ両ワイヤバレル片217B,217Bに連なって形成されている。なお、繋ぎ部219の断面形状としては、例えば半円形状としてもよく、必要に応じて任意の形状としうる。
繋ぎ部219には、合成樹脂をモールド成形してなる止水壁222が設けられている。止水壁222を構成する合成樹脂としては、ポリアミド、ポリエステル、ポリプロピレン、ポリエチレン等の熱可塑性樹脂を用いてもよく、また、エポキシ樹脂等の熱硬化製樹脂を用いてもよく、必要に応じて任意の合成樹脂を用いることができる。上記の合成樹脂は、1種類のみを用いてもよく、また、複数種類の合成樹脂を混合して用いてもよい。本実施形態においては、ポリアミド系熱可塑性樹脂が用いられている。
止水壁222は、図18に示すように、繋ぎ部219の外周を全周に亘って包囲して形成されている。すなわち、繋ぎ部219のうち止水壁222と対応する部分は、止水壁222の内部に埋設されている。また、止水壁222の断面形状は、四隅の角部が丸められた略方形状をなしている。
電線211の端部には樹脂リング223が外嵌されている。詳細には、絶縁被覆214の端部であって、インシュレーションバレル216が圧着された部分よりも後方(露出した芯線213と反対方向)の位置に、断面形状が円形状をなす樹脂リング223が絶縁被覆214に全周に亘って密着した状態で外嵌されている。樹脂リング223の内径は絶縁被覆214の外径とほぼ同一に設定されている。ここで、ほぼ同一とは、樹脂リング223の内径が絶縁被覆214の外径と同じ場合と、樹脂リング223の内径が絶縁被覆214の外径よりもやや大きい場合と、樹脂リング223の内径が絶縁被覆214の外形よりもやや小さい場合と、を含む。これにより、樹脂リング223は、電線211の端部に、容易に外嵌させることができるようになっている。
樹脂リング223を構成する合成樹脂材としては、ポリアミド、ポリエステル、ポリプロピレン、ポリエチレン等の熱可塑性樹脂を用いてもよく、また、エポキシ樹脂等の熱硬化製樹脂や合成ゴムを用いてもよく、必要に応じて任意の合成樹脂材を用いることができる。上記の合成樹脂材は、1種類のみを用いてもよく、また、複数種類の合成樹脂材を混合して用いてもよい。本実施形態においては、ポリアミド系熱可塑性樹脂が用いられている。
止水壁222からワイヤバレル217、インシュレーションバレル216、樹脂リング223が外嵌された部分、更に、樹脂リング223を越えて絶縁被覆214に至るまでの領域は、図15に示すように、合成樹脂からなる熱収縮チューブ224(止水被覆に相当)によって被覆されている。本実施形態においては、熱収縮チューブ224の内面には、図示しない接着層又は粘着層が形成されている。接着層又は粘着層は、加熱されて軟化又は溶融することにより、接着性又は粘着性が発現するようになっている。なお、熱収縮チューブ224の内面に接着層又は粘着層を設けない構成としてもよい。熱収縮チューブ224の前後方向の長さ寸法は、止水壁222における接続部220側の端部から樹脂リング223が外嵌された位置までの領域を覆うことが可能な長さ寸法に設定されている。
止水壁222を構成する合成樹脂として、加熱によって軟化又は溶融することにより接着性を発現するものを用いてもよい。この場合には、熱収縮チューブ224を加熱する工程において、止水壁222を軟化又は溶融させ、熱収縮チューブ224の内周面と止水壁222の外周面とを接着する構成とすることができる。
また、樹脂リング223を構成する合成樹脂として、加熱によって軟化又は溶融することにより接着性を発現するものを用いてもよい。この場合には、熱収縮チューブ224を加熱する工程において、樹脂リング223を軟化又は溶融させ、熱収縮チューブ224の内周面と樹脂リング223の外周面とを接着する構成とすることができる。更に、樹脂リング223を上記のような合成樹脂材で形成することにより、樹脂リング223の内周面と絶縁被覆214の外周面とを接着することができる。
さて、止水壁222には、止水壁222のワイヤバレル217側の後端面に連なる連設部225が、止水壁222と一体に形成されている。
この連設部225は、図19に示すように、繋ぎ部219の底板219Aと、繋ぎ部219の一対の側板219B,219Bとの外周面を全周に亘ってほぼ均一な合成樹脂層で覆って形成されている。つまり、連設部225は、底板219Aを覆ってなる底板部225Aと、両側板219Bを覆ってなる一対の側板部225B,225Bとから構成されている。これにより、連設部225は上方に開口した溝状をなし、かつ連設部225の後端部が後方に開口した形態をなしている。また、両側板部225B,225Bは、底板部225Aを基端部として先端部が互いに接近し又は離れる方向に撓み変形可能とされている。すなわち、連設部225における芯線213が延びる方向と直交する断面は、止水壁222の断面に比べて樹脂の占有面積が狭く形成されている。また、連設部225は、図16に示すように、止水壁222の後端面からワイヤバレル217の前端縁よりもやや前方の位置まで形成されており、連設部225とワイヤバレル217との間には僅かな隙間が形成されている。
更に、連設部225の後方開口縁は、後方に向かって間口が広くなるように真っ直ぐ傾斜する傾斜面225C(案内面に相当)が形成されている。傾斜面225Cは、底板部225Aと両側板部225B,225Bとによって囲まれた領域に、芯線213が後方から進入する際に、この芯線213を正規の収容位置に案内する役割を果たしている。
続いて、本実施形態に係る端子付き電線210の製造工程の一例を示す。まず、金属板材に打ち抜き工程(図示せず)を実行することにより、帯状をなすキャリア226と、このキャリア226の側縁に連結された複数の端子片227と、を形成する。
更に、連設部225の後端開口縁には、後方に向かうほど間口が広くなる傾斜面225Cが形成されていることから、芯線213の先端が連設部225の後端面に引っかからないように、芯線213を底板部225Aと両側板部225B,225Bとによって囲まれた領域に案内することができる。これにより、芯線213が連設部225の後端面を押圧することを一層確実に抑制することができる。
なお、上記の加熱工程において、接続部220を上方に向けた姿勢で加熱することにより、加熱工程において止水壁222が溶融した場合でも、止水壁222を構成する合成樹脂材が接続部220内に流入することを抑制することができる。これにより、接続部220における相手側の雄型端子との電気的な接続信頼性を向上させることができる。
続いて、本実施形態の作用、効果について説明する。本実施形態によれば、繋ぎ部219には止水壁222が設けられているので、繋ぎ部219から水が浸入して、芯線213及びワイヤバレル217に水が付着することを抑制できる。更に、止水壁222の外周面は、熱収縮チューブ224の内周面と、全周に亘って隙間なく密着しているので、止水壁222と熱収縮チューブ224との間から水が浸入することも抑制される。これにより、繋ぎ部219のうち止水壁222が形成された部分から、ワイヤバレル217、インシュレーションバレル216、樹脂リング223が外嵌された部分、更に、樹脂リング223を越えて絶縁被覆214に至るまでの領域は、熱収縮チューブ224によって止水されるので、芯線213及びワイヤバレル217に水が付着することを確実に抑制できる。
特に、本実施形態のように、芯線213がアルミニウム又はアルミニウム合金からなり、雌端子212が銅又は銅合金の表面にスズメッキ層が形成されてなる場合には、比較的にイオン化傾向の大きなアルミニウム又はアルミニウム合金からなる芯線213が電食により溶解するおそれがあるので、特に有効である。なお、アルミニウム又はアルミニウム合金は比重が比較的に小さいので、電線211を軽量化できる。
更に、連設部225の後端開口縁には、後方に向かうほど間口が広くなる傾斜面225Cが形成されていることから、芯線213の先端が連設部225の後端面に引っかからないように、芯線213を底板部225Aと両側板部225B,225Bとによって囲まれた領域に案内することができる。これにより、芯線213が連設部225の後端面を押圧することを一層確実に抑制することができる。
更に、熱収縮チューブ224の内周面には接着層又は粘着層が形成されているので、熱収縮チューブ224を収縮させるための加熱工程を実行することにより、熱収縮チューブ224の内面と、止水壁222の外面とを確実に隙間なく密着させることができると共に、熱収縮チューブ224と絶縁被覆214の端部の外面とを確実に隙間なく密着させることができる。
このように、止水被覆として内周面に接着層又は粘着層が形成された熱収縮チューブ224を用いることにより、止水壁222から絶縁被覆214の端部に至るまでの領域の外周に熱収縮チューブ224を被せる工程の作業効率を向上させることができる。また、熱収縮チューブ224と、止水壁222の外面及び絶縁被覆214の端部の外面との密着性を向上させることができる。
また、本実施形態においては、切断工程は、圧着工程と同一の工程において実行される。これにより、切断工程と圧着工程とを異なる工程で実行する場合に比べて、作業効率を向上させることができる。
次に、本発明の実施形態2-2について図23によって説明する。
本実施形態の端子付き電線230は、実施形態2-1の連設部225の周辺構造を変更したものであって、実施形態2-1と共通する構成、作用、および効果については重複するため、その説明を省略する。また、実施形態2-1と同じ構成については同一の符号を用いるものとする。
また、熱収縮チューブ224の内面は、繋ぎ部219の外周面と、繋ぎ部219の両側板219B,219Bの先端面と、連設部231の両側板部231B,231Bの先端面とに密着している。これにより、本実施形態によれば、連設部231を構成する合成樹脂の量を削減できるので、製造コストを削減できる。
また、連設部231の合成樹脂の量が少なくなっていると共に、合成樹脂層が繋ぎ部219を全周に亘って包囲していないことから、連設部231における両側板部231Bが両ワイヤバレル片217B,217Bの撓み変形に追随して撓み変形しやすくなっている。これにより、連設部231の樹脂層が、破損したり、繋ぎ部219から樹脂層が剥離したりすることを抑制することができる。
次に、本発明の実施形態2-3について図24によって説明する。
本実施形態の端子付き電線240は、実施形態2-1の止水壁222をワイヤバレル217側にずらしたものであって、実施形態2-1と共通する構成、作用、および効果については重複するため、その説明を省略する。また、実施形態2-1と同じ構成については同一の符号を用いるものとする。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態においては、端子は雌端子212であったが、これに限られず、繋ぎ部219から芯線213の延びる方向に、更に延びて形成された雄タブを備えた雄端子であってもよく、また、繋ぎ部219に連なって円板状の接続部を形成し、この接続部に貫通孔が形成された、いわゆるLA端子であってもよい。
前記繋ぎ部は、底板と、この底板の両側縁から前記芯線側に立ち上る一対の側板からなる凹形状に設けられ、前記連設部は、前記底板の外面と、前記一対の側板の外面とに沿って溝状に形成されている構成としてもよい。
このような構成によると、案内面によって、芯線を連設部に円滑に案内することができる。
本明細書に開示された技術によれば、端子及び端子付き電線の防水性を向上させることができる。
従来、端子付き電線として特開2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁被覆で被覆してなる電線と、絶縁被覆から露出する芯線に接続された端子とを備える。端子は、芯線が載置された平板状の基板部と、この基板部から突出されると共に芯線に圧着されたワイヤバレルとを備える。基板部から絶縁被覆の端末に至る領域には、熱収縮チューブが被せられ、熱収縮チューブの一端側はワイヤバレルで圧着された芯線を被覆していると共に、他端側は絶縁被覆に密着している。
端子付き電線3Aは、電線310と、この電線310の端末に接続された雌端子320(端子に相当)とから構成されている。
接続筒部321は、図示しない相手の雄端子のタブが挿入されて接続されるものであって、内部に弾性接触片322が備えられている。
繋ぎ部324は、図29に示すように、底板324Aの両側縁から側板324Bを立ち上げたチャンネル型に形成されている。
止水壁330は、図29にも示すように、繋ぎ部324の外周を全周に亘って包囲可能に形成され、正面視が角を丸めた略四角形の厚板状をなしている。
したがって、当て板332の止水壁330の後面から離間距離は、芯線311の材質や線径、さらには圧着力等の条件に応じた芯線311の予想される最大の伸び代を勘案して設定することが望ましい。
本実施形態の熱収縮チューブ340は、その内面に、図示はしないが接着層又は粘着層が形成されている。接着層又は粘着層は、加熱されて軟化又は溶融することにより、接着性又は粘着性が発現するようになっている。
なお、熱収縮チューブ340は、その内面に接着層又は粘着層を設けていないものであってもよい。この場合は、止水壁330を構成する合成樹脂材として、加熱によって軟化又は溶融することにより接着性を発現するものを用いるとよい。このような合成樹脂材で止水壁330を形成した場合は、熱収縮チューブ340を加熱する工程において、止水壁330を軟化又は溶融させ、熱収縮チューブ340の内面と止水壁330の外面とを接着する構成とすることができる。
絶縁被覆312に対しては、内面に接着層又は粘着層を設けていない熱収縮チューブ340であっても、密着させることが可能である。
金属製のフープ材をプレス加工機に通して順次に打ち抜き工程、曲げ工程等を実行することにより、連鎖端子315が形成される。工程の終盤では、図28の上側に示すように、キャリア316の一側縁に、組み上げられた雌端子320が、一定ピッチを開けて連結された形態となる。このときの雌端子320は、接続筒部321が所定の筒形に組み上げられ、繋ぎ部324が所定のチャンネル型に形成されている一方、ワイヤバレル326とインシュレーションバレル328は圧着前の開いた状態にある。各雌端子320は、インシュレーションバレル328の底板328Aの後縁が、キャリア316の一側縁に連結部317を介して連結されている。
モールド工程ではより詳細には、雌端子320の繋ぎ部324における所定位置が、上下一対のモールド成形金型で閉じられ、両成形金型内に形成されたキャビティの内部に溶融状態の合成樹脂材が注入される。合成樹脂材がキャビティ内で固化した後、両金型が開かれると、図28の下側に示すように、雌端子320の繋ぎ部324の所定位置に、連結部334と当て板332とを含む止水壁330が形成される。このような止水壁330のモールド成形が、複数ずつの雌端子320に対して間欠的に実行される。
電線圧着現場には、端末処理が施された電線310、すなわち端末において絶縁被覆312が皮剥きされて芯線311の端末が所定長露出状態とされた電線310が準備される。
なお、雌端子320を連鎖端子315の状態のままで圧着金型にセットし、圧着工程と同時にキャリア316から切り離すようにしてもよい。
被覆工程では、熱収縮チューブ340が、電線310側又は雌端子320側から挿通され、止水壁330から絶縁被覆312のうちのインシュレーションバレル328の圧着部分よりも後方位置に亘る領域に被せられる。熱収縮チューブ340の内径は、加熱前の状態において、接続筒部321の外形状よりも大きく設定することにより、比較的容易に雌端子320側から挿通することができる。また、電線310側から挿通する場合には、圧着工程を実行する前に、予め電線310に熱収縮チューブ340を挿通しておけばよい。
なお、上記の加熱工程において、接続筒部321が上を向いた縦向きの姿勢で加熱すると、止水壁330が図らずも溶融した場合でも、止水壁330を構成する合成樹脂材が接続筒部321内に流入することが回避される。その結果、接続筒部321における相手の雄端子との電気的な接続信頼性が向上する。
接続筒部321とワイヤバレル326とを繋ぐ繋ぎ部324には、止水壁330が合成樹脂材のモールド成形により設けられているから、繋ぎ部324の外面に沿って水が浸入することが防止される。また、熱収縮チューブ340の開口端の内面が止水壁330の外面に密着しているから、止水壁330と熱収縮チューブ340との間から水が浸入することも防止される。これにより、止水壁330から絶縁被覆312の端末に至る領域は熱収縮チューブ340によって防水され、芯線311及びワイヤバレル326に水が付着することを防止できる。
次に、本発明の実施形態3-2を図33ないし図35によって説明する。この実施形態3-2は、雌端子320の繋ぎ部324にモールド成形された止水壁330の後面側に、圧着前の芯線311の先端を当てる当て部を設ける部分の構造に変更を加えたものである。
以下には、変更部分について主に説明し、実施形態3-1と共通部分については、同一符号を付すことで説明は省略若しくは簡略化する。
この周壁335における繋ぎ部324内の後端側の開口に薄膜336が形成されている。より詳細には、薄膜336の左右両側縁は周壁335の内面に繋がり、下縁は繋ぎ部324の底板324Aに接触した形態にある。この薄膜336が、当て部に相当する。
図36ないし図38は、本発明の実施形態3-3を示す。この実施形態3-3は、雌端子320の繋ぎ部324にモールド成形された止水壁330の後面側に、圧着前の芯線311の先端を当てる当て部を設ける部分の構造に別の変更を加えたものである。同様に主に変更部分について説明する。
この周壁335における繋ぎ部324内の後端側の開口の内周に沿って、断面山形をなす突条338が形成されている。より詳細には、突条338における左右の垂直部は周壁335の内面に繋がり、水平部は繋ぎ部324の底板324A上を走っている。この突条338が、当て部に相当する。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)止水壁330の後面側に配される圧着前の芯線311の先端を当てる当て部の形態は、上記実施形態に例示したものに限らず、要は、当該当て部の変位若しくは欠損を伴って芯線311の先端が前進することを許容し、かつ、当て部の止水壁330の後面からの離間距離が、芯線311の先端が当て部に当たった状態から芯線311が伸びた場合に、芯線311の先端が止水壁330の後面に押圧力を作用させないか、若しくは止水壁330の後面に到達しない距離に設定されているものであれば、他の形態であってもよい。
本明細書に開示された技術は、芯線の外周を絶縁被覆で被覆した電線の端末に端子が接続されてなる端子付き電線であって、前記端子が、導電部材と接続される接続部と、前記絶縁被覆の端末から露出された前記芯線の端末に圧着されるワイヤバレルと、このワイヤバレルと前記接続部とを繋ぐ繋ぎ部とを備えて構成され、前記繋ぎ部には合成樹脂材をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端末の外面とに密着して前記止水壁と前記絶縁被覆の端末との間に亘って前記芯線を覆う筒状の止水被覆が設けられており、前記止水壁には、当該止水壁における前記芯線の先端と対向する面である後面から後方に離間した位置において圧着前の前記芯線の先端を当てる当て部が一体的に設けられ、この当て部は、当該当て部の変位若しくは欠損を伴って前記芯線の先端が前進することを許容し、かつ、前記当て部の前記止水壁の後面からの離間距離が、前記芯線の先端が前記当て部に当たった状態から前記芯線が伸びた場合に、前記芯線の先端が前記止水壁の後面に押圧力を作用させないか、若しくは前記止水壁の後面に到達しない距離に設定されているところに特徴を有する。
(1)前記当て部が、前記止水壁の後面に弾縮可能に突設された連結部の先端に設けられた当て板であり、この当て板は、前記連結部を弾縮させて前方に変位することを伴って前記芯線の先端が前進することを許容し、かつ、前記当て板の前記止水壁の後面からの離間距離が、前記芯線の先端が前記当て板に当たった状態から前記芯線が伸びた場合に、前記芯線の先端が前記止水壁の後面に押圧力を作用させない距離に設定されている。
芯線をセットする場合、芯線の先端が薄膜に当てられることで前止まりされる。芯線が圧着されて伸びが生じた際、芯線の先端は薄膜を破って周壁内に進入しつつ止水壁に接近するが、止水壁まで到ることはない。
(5)前記芯線を構成する金属と、前記端子を構成する金属とが異なる。
本明細書に開示された技術によれば、芯線の伸びに起因した止水壁の破損や芯線の乗り上げが防止できて、止水被覆の開口端を止水壁の外面に正確に密着させることができ、もって芯線及びワイヤバレルに水が付着することをより確実に防止できる。
従来、端子付き電線として特開2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁被覆で被覆してなる電線と、絶縁被覆から露出する芯線に接続された端子と、を備える。端子は、芯線が載置された平板状の基板部と、この基板部から突出されると共に芯線に圧着されたワイヤーバレルと、を備える。
電線411は、複数の金属細線を撚り合せてなる1つの芯線413と、芯線413の外周を被覆する合成樹脂製の絶縁被覆414と、を備える。芯線413は、銅、銅合金、アルミニウム、アルミニウム合金等、必要に応じて任意の金属から構成される。本実施形態においては、アルミニウム又はアルミニウム合金が用いられている。電線411の端末においては、絶縁被覆414が剥離されることにより、芯線413が露出している。なお、芯線413は単芯線でもよい。
雌端子412は金属板材を所定形状のプレス加工して形成される。雌端子412を構成する金属としては、銅、銅合金等、必要に応じて任意の金属を採用しうる。また、金属板材の表面には図示しないメッキ層が形成されている。メッキ層を構成する金属としては、スズ、ニッケル等、必要に応じて任意の金属を採用しうる。本実施形態においては、銅又は銅合金の表面にスズメッキ層が形成されている。なお、金属板材の表面にメッキ層を形成しない構成としてもよい。
延出部419には、合成樹脂材をモールド成形することにより止水壁422が設けられている。止水壁422を形成する合成樹脂材としては、ポリアミド、ポリエステル、ポリプロピレン、ポリエチレン等の熱可塑性樹脂を用いてもよく、また、エポキシ樹脂等の熱硬化製樹脂を用いてもよく、必要に応じて任意の合成樹脂材を用いることができる。上記の合成樹脂材は、1種類のみを用いてもよく、また、複数種類の合成樹脂材を混合して用いてもよい。本実施形態においては、ポリアミド系熱可塑性樹脂が用いられている。
電線411の端部には合成樹脂製の樹脂リング423が外嵌されている。詳細には、絶縁被覆414の端部であって、インシュレーションバレル416が圧着された部分よりも後方(露出した芯線413と反対方向)の位置に、断面形状が円形状をなす樹脂リング423が外嵌されている。樹脂リング423の内径は絶縁被覆414の外径と略同じに設定されている。これにより、樹脂リング423は、電線411の端部に、容易に外嵌させることができるようになっている。なお、略同じとは、樹脂リング423の内径が絶縁被覆414の外径と同じ場合と、樹脂リング423の内径が絶縁被覆414の外径よりもやや大きい場合と、樹脂リング423の内径が絶縁被覆414の外形よりもやや小さい場合と、を含む。
延出部419のうち止水壁422が形成された部分から、ワイヤーバレル417、インシュレーションバレル416、樹脂リング423が外嵌された部分、更に、樹脂リング423を越えて絶縁被覆414に至るまでの領域には、合成樹脂材からなる止水被覆425によって被覆されている。本実施形態においては、止水被覆425は熱収縮チューブ424からなる。本実施形態においては、熱収縮チューブ424の内面には、図示しない接着層又は粘着層が形成されている。接着層又は粘着層は、加熱されて軟化又は溶融することにより、接着性又は粘着性が発現するようになっている。なお、熱収縮チューブ424の内面に接着層又は粘着層を設けない構成としてもよい。熱収縮チューブ424の長さ寸法は、止水壁422から樹脂リング423に至る領域の長さ寸法よりも長く設定されている。
続いて、本実施形態に係る端子付き電線410の製造工程の一例を示す。まず、金属板材に打ち抜き工程を実行することにより、帯状をなすキャリア426と、このキャリア426の側縁に連結された複数の端子片427と、を形成する。キャリア426には、長手方向に沿って略等間隔に並ぶ送り孔428が形成されている。この送り孔428には、加工機に設けられた図示しない送り爪が係合するようになっている。
曲げ工程を実行する際に、延出部419の幅方向の両端部419F,419Fから突出する凸部419A,419Aをそれぞれ、内側方向(端子片427の中心軸方向)へ折り曲げて延出部20を箱状に形成しておく。
続いて、本実施形態の作用、効果について説明する。本実施形態によれば、延出部419には止水壁422が設けられているので、延出部419から水が浸入して、芯線413及びワイヤーバレル417に水が付着することを抑制できる。更に、止水壁422の外周面は、熱収縮チューブ424の内面と、全周に亘って隙間なく密着しているので、止水壁422と熱収縮チューブ424との間から水が浸入することも抑制される。これにより、延出部419のうち止水壁422が設けられた部分から、ワイヤーバレル417、インシュレーションバレル416、樹脂リング423が外嵌された部分、更に、樹脂リング423を越えて絶縁被覆414に至るまでの領域は、熱収縮チューブ424によって止水されるので、芯線413及びワイヤーバレル417に水が付着することを確実に抑制できる。
ここで、本実施形態の雌端子412は、メッキを施した金属板材を所定形状に打ち抜く打ち抜き工程を経て作製されるので、端面にはメッキが施されておらず、他の部分よりも酸化(腐食)が進みやすい。そのため、延出部419と止水壁422との隙間から浸入した水が延出部419に付着すると、図43の矢線Xで示すように、延出部419の端面419Cに沿って腐食が進行する。
次に、本発明の実施形態4-2を、図44~図49を参照しつつ説明する。本実施形態においては、延出部419の幅方向の両端部419D,419Dに形成された凸部419A,419Aには、それぞれ、方形状の孔部419B,419Bが形成されている点で実施形態4-1と相違する。上記以外の構成については、実施形態4-1と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
本実施形態によれば延出部419に凸部419Aが形成されているので、実施形態4-1と同様に、延出部419の端面の長さが、凸部419Aのない構成のものよりも、凸部419Aの外周縁分だけ長くなっている。したがって、本実施形態によっても、腐食経路(図45中の矢線Y)が長くなるので、腐食がワイヤーバレル417に至るのを遅延させることができる。
一方、孔部419Bが形成されていない凸部419Aを備える延出部419においては、接続筒部側の端部419Sとワイヤーバレル417側の端部419Eとの間に腐食を中断するものがないため、図49に示すようにF2に示す範囲まで腐食が進んだ後も腐食が進みやすく、ワイヤーバレル417側の端部419Eの近傍にまで腐食が及んでしまう。
次に、本発明の実施形態4-3について図50および図51を参照しつつ説明する。本実施形態においては、延出部419の幅方向の両端部419D,419Dに、凸部419Aと凹み部419Fが交互に形成されている点で実施形態4-1と相違する。上記以外の構成については、実施形態4-1と略同様なので、同一部材については同一符号を付し、重複する説明を省略する。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)本実施形態においては、端子は雌端子412であったが、これに限られず、延出部419から芯線413の延びる方向に、更に延びて形成された雄タブを備えた雄端子であってもよく、また、延出部419に連なって円板状の接続部を形成し、この接続部に貫通孔が形成された、いわゆるLA端子であってもよく、また、延出部419に連なって更に形成された他のワイヤーバレル417に複数の電線411が接続されたスプライス端子であってもよく、必要に応じて任意の形状の端子とすることができる。
なお、端子を構成する材料としてメッキを施していない金属板材を用いた場合であっても、端面では他の部分よりも腐食が進みやすいため、本発明の効果が得られる。
(9)本実施形態においては、樹脂リング423は円環状をなす構成としたが、これに限られず、例えば、樹脂リング423にはスリットを形成し、断面形状が略C字状をなす形態としてもよい。これにより、樹脂リング423は容易に拡径可能となるので、例えば、端子を電線411に圧着した後に、樹脂リング423を拡径させて、電線411に外嵌させることができる。
上記課題を解決するものとして本明細書に開示された技術は、芯線の外周を絶縁被覆で被覆してなる電線に端子が接続されてなる端子付き電線であって、前記端子は、前記絶縁被覆の端部から露出された前記芯線に圧着されたワイヤーバレルと、前記ワイヤーバレルの底板から延びる延出部と、を備えて構成され、前記延出部には、合成樹脂をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端部の外面とに密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられ、前記延出部の幅方向の端部には、前記端部から突出する凸部、および前記端部よりも凹んだ凹み部のうち、少なくとも一方が形成されていることを特徴とする端子付き電線である。
前記延出部の幅方向の両端部には、それぞれ前記凸部が形成されていることが好ましい。このような態様とすると、延出部の幅方向の両側の端部において腐食経路を長くすることができ、かつ、延出部の強度を高めることができる。
本明細書に開示された技術によれば、端子付き電線及び端子の防水性を向上させることができる。
従来、端子付き電線として特開2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁被覆で被覆してなる電線と、絶縁被覆から露出する芯線に接続された端子とを備える。端子は、芯線が載置された平板状の基板部と、この基板部から突出されると共に芯線に圧着されたワイヤバレルとを備える。基板部から絶縁被覆の端末に至る領域には、熱収縮チューブが被せられ、熱収縮チューブの一端側はワイヤバレルで圧着された芯線を被覆していると共に、他端側は絶縁被覆に密着している。
繋ぎ部519は、底板515の両側縁から側板519Aが立ち上げられた断面U字形状に形成されている(図57参照)。
繋ぎ部519のうち止水壁522との境界面530には、凹凸部540が形成されている(図53参照)。詳しくは、凹凸部540は、繋ぎ部519における止水壁522との境界面530のうち芯線513が配置される側の面、すなわち一対の側板519Aの内側面531および底板515の内側面534(内側境界面536と称する)と、その反対側の面、すなわち一対の側板519Aの外側面532および底板515の外側面535(外側境界面537と称する)との両面に形成されている。
まず、金属板材に打ち抜き工程を実行する。これにより、帯状をなすキャリア526の側縁に、複数の端子片527が連結された形態の連鎖端子529を形成する。キャリア526には、長手方向に沿って略等間隔に並ぶ送り孔528を形成する。この送り孔528には、加工機に設けられた図示しない送り爪が係合するようになっている。
なお、圧着工程を実行する前に、予め電線511に熱収縮チューブ524を挿通させておいてもよい。
芯線513の外周を絶縁被覆514で被覆した電線511の端末に雌端子512が接続されてなる端子付き電線510であって、雌端子512が、相手側端子に接続される接続部520と、絶縁被覆514の端末から露出された芯線513の端末に圧着されるワイヤバレル517と、このワイヤバレル517と接続部520とを繋ぐ繋ぎ部519とを備えて構成され、繋ぎ部519には合成樹脂材をモールド成形してなる止水壁522が設けられ、この止水壁522の外面と絶縁被覆514の端末の外面とに密着して止水壁522と絶縁被覆514の端末との間に亘って芯線513を覆う筒状の熱収縮チューブ524が設けられており、繋ぎ部519における止水壁522との境界面530には、凹凸部540が形成されている。
これにより、熱収縮チューブ524が、止水壁522の外面と絶縁被覆514の端部の外面とに密着して、止水壁522と絶縁被覆514の端部との間に亘って芯線513を覆うから、芯線513側への水の浸入を防ぐことができ、防水性に優れたものとなる。
また、熱収縮チューブ524は、加熱前の内径寸法の大きいものを装着位置に配し、加熱により収縮させることで、その内面を、止水壁522の外面と絶縁被覆514の端末の外面とに密着させることができるから、端子付き電線510の製造を容易に行うことができる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
本明細書に開示された技術に係る端子付き電線は、芯線の外周を絶縁被覆で被覆した電線の端末に端子が接続されてなる端子付き電線であって、前記端子が、導電部材に接続される接続部と、前記絶縁被覆の端末から露出された前記芯線の端末に圧着されるワイヤバレルと、このワイヤバレルと前記接続部とを繋ぐ繋ぎ部とを備えて構成され、前記繋ぎ部には合成樹脂材をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端末の外面とに密着して前記止水壁と前記絶縁被覆の端末との間に亘って前記芯線を覆う筒状の止水被覆が設けられており、前記繋ぎ部における前記止水壁との境界面のうち少なくとも前記芯線が配置される側の面には、凹凸部が形成されている。
本明細書に開示された技術によれば、防水性に優れた端子付き電線および端子を提供することができる。
従来、コネクタに収容される端子付き電線として特開2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁被覆で被覆してなる電線と、絶縁被覆から露出する芯線に接続された端子と、を備える。端子は、芯線が載置された平板状の基板部と、この基板部から突出されると共に芯線に圧着されたワイヤーバレルと、を備える。
相手側の雄コネクタ640(図71に概略を鎖線で示す)は、合成樹脂製の雄コネクタハウジング641と、雄コネクタハウジング641に収容される雄端子642とを備える。
雄コネクタハウジング641は、嵌合方向に筒状に開口するフード部と、フード部の内部を閉塞する奥壁部とを備えており、この奥壁部を貫通した棒状のL字形の雄端子642がフード部内に突出している。
コネクタハウジング631は、直方体状であって、雌端子612を後方から挿入可能なキャビティ632が幅方向に4個(複数)並んで設けられている。
キャビティ632の前端部には、雌端子612の前面に対向する前止まり壁633が形成されており、この前止まり壁633には、雄端子642を通す通し孔634が形成されている。
(電線611)
電線611は、複数の金属細線を撚り合せてなる1つの芯線613と、芯線613の外周を被覆する合成樹脂製の絶縁被覆614と、を備える。芯線613は、銅、銅合金、アルミニウム、アルミニウム合金等、必要に応じて任意の金属から構成される。本実施形態においては、アルミニウム又はアルミニウム合金が用いられている。電線611の端末においては、絶縁被覆614が剥離されることにより、芯線613が露出している。なお、芯線613は単芯線でもよい。
雌端子612は金属板材を所定形状のプレス加工して形成される。雌端子612を構成する金属としては、銅、銅合金等、必要に応じて任意の金属を採用しうる。また、金属板材の表面には図示しないメッキ層が形成されている。メッキ層を構成する金属としては、スズ、ニッケル等、必要に応じて任意の金属を採用しうる。本実施形態においては、銅又は銅合金の表面にスズメッキ層が形成されている。なお、金属板材の表面にメッキ層を形成しない構成としてもよい。
底板615の側縁には、1対のインシュレーションバレル616が突出して形成されている。インシュレーションバレル616は、電線611の絶縁被覆614及び芯線613が底板615に載置された状態で、絶縁被覆614の外側から抱くようにして絶縁被覆614に圧着されている。なお、図67では、1対のインシュレーションバレル616が上部で折り重なる(オーバーラップする)ようになっているが、これに限られず、例えば、1対のインシュレーションバレル616の先端同士が幅方向の中心部で突き合わさせた構成のものを用いてもよい。
延出部619には、芯線613の延びる方向に更に延びて、筒状をなすと共に図示しない相手側端子と接続する接続筒部620が形成されている。接続筒部620内には相手側端子と弾性的に接触する弾性接触片621が設けられている。
延出部619には、図67に示すように、合成樹脂材をモールド成形することにより止水壁622が形成されている。止水壁622を形成する合成樹脂材としては、ポリアミド、ポリエステル、ポリプロピレン、ポリエチレン等の熱可塑性樹脂を用いてもよく、また、エポキシ樹脂等の熱硬化製樹脂を用いてもよく、必要に応じて任意の合成樹脂材を用いることができる。上記の合成樹脂材は、1種類のみを用いてもよく、また、複数種類の合成樹脂材を混合して用いてもよい。本実施形態においては、ポリアミド系熱可塑性樹脂が用いられている。
止水壁622は、延出部619の外周を全周に亘って包囲して形成されている。延出部619内には、止水壁622が充填されている。本実施形態においては、止水壁622の断面は、角が丸められた略四角形状をなしている。
電線611の端部には合成樹脂製の樹脂リング623が外嵌されている。詳細には、絶縁被覆614の端部であって、インシュレーションバレル616が圧着された部分よりも後方(露出した芯線613と反対方向)の位置に、断面形状が円形状をなす樹脂リング623が外嵌されている。樹脂リング623の内径は絶縁被覆614の外径と略同じに設定されている。これにより、樹脂リング623は、電線611の端部に、容易に外嵌させることができるようになっている。なお、略同じとは、樹脂リング623の内径が絶縁被覆614の外径と同じ場合と、樹脂リング623の内径が絶縁被覆614の外径よりもやや大きい場合と、樹脂リング623の内径が絶縁被覆614の外形よりもやや小さい場合と、を含む。
延出部619のうち止水壁622が形成された部分から、ワイヤーバレル617、インシュレーションバレル616、樹脂リング623が外嵌された部分、更に、樹脂リング623を越えて絶縁被覆614に至るまでの領域には、合成樹脂材からなる止水被覆625によって被覆されている。本実施形態においては、止水被覆625は熱収縮チューブ624からなる。本実施形態においては、熱収縮チューブ624の内面には、図示しない接着層又は粘着層が形成されている。接着層又は粘着層は、加熱されて軟化又は溶融することにより、接着性又は粘着性が発現するようになっている。なお、熱収縮チューブ624の内面に接着層又は粘着層を設けない構成としてもよい。熱収縮チューブ624の長さ寸法は、止水壁622から樹脂リング623に至る領域の長さ寸法よりも長く設定されている。
熱収縮チューブ624の内面は、熱収縮チューブ624が加熱されて収縮した状態において、止水壁622の外周面と全周に亘って隙間なく密着している。また、熱収縮チューブ624の内面は、樹脂リング623の外周面と全周に亘って隙間なく密着している。
コネクタハウジング631のキャビティ632の後端の開口部632Aから端子付き電線610を前端側から挿通していくと(図71参照)、ランスに当接してランスを弾性変形させるとともに、雌端子612の先端が前止まり壁633に近接する(対向する)正規位置(図71の位置)まで挿通される。このときランスが復元変形して接続筒部620の後端部に係止し、端子付き電線610のキャビティ632からの抜け止めが図られる。
続いて、本実施形態に係る端子付き電線610の製造工程の一例を示す。まず、金属板材に打ち抜き工程を実行することにより、帯状をなすキャリア626と、このキャリア626の側縁に連結された複数の端子片627と、を形成する(図69参照)。キャリア626には、長手方向に沿って略等間隔に並ぶ送り孔628が形成されている。この送り孔628には、加工機に設けられた図示しない送り爪が係合するようになっている。
この打ち抜き工程において、ワイヤーバレル617のうち芯線613が載置される側の面に複数の凹部618を形成してもよい。また、打ち抜き工程とは別の工程において、上記の凹部618を形成してもよい。
本実施形態によれば以下の効果を奏する。
(1)本実施形態によれば、延出部619内には止水壁622が充填されているので、延出部619から水が浸入して、芯線613及びワイヤーバレル617に水が付着することを抑制できる。更に、止水壁622の外周面は、熱収縮チューブ624(止水被覆)の内面と、全周に亘って隙間なく密着しているので、止水壁622と熱収縮チューブ624との間から水が浸入することも抑制される。これにより、延出部619のうち止水壁622が形成された部分から、ワイヤーバレル617、インシュレーションバレル616、樹脂リング623が外嵌された部分、更に、樹脂リング623を越えて絶縁被覆614に至るまでの領域は、熱収縮チューブ624によって止水されるので、芯線613及びワイヤーバレル617に水が付着することを確実に抑制できる。
このように、止水被覆625として内周面に接着層又は粘着層が形成された熱収縮チューブ624を用いることにより、止水壁622から絶縁被覆614の端部に至る領域の外周に熱収縮チューブ624を配置する工程の作業効率を向上させることができると共に、熱収縮チューブ624と、止水壁622及び絶縁被覆614の端部との密着性を向上させることができる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)実施形態6-1においては、端子は雌端子612であったが、これに限られず、延出部619から芯線613の延びる方向に、更に延びて形成された雄タブを備えた雄端子であってもよく、また、延出部619に連なって円板状の接続部を形成し、この接続部に貫通孔が形成された、いわゆるLA端子であってもよく、また、延出部619に連なって更に形成された他のワイヤーバレル617に複数の電線611が接続されたスプライス端子であってもよく、必要に応じて任意の形状の端子とすることができる。
(3)止水被覆625は、シート状をなす止水テープを、止水壁622から絶縁被覆614の端部に至る領域に巻回する構成としてもよい。
(5)実施形態6-1においては、芯線613がアルミニウム又はアルミニウム合金からなる構成としたが、これに限られず、芯線613は銅又は銅合金からなる構成としてもよく、必要に応じて任意の金属により形成される構成としてもよい。また、実施形態6-1においては、雌端子612が銅又は銅合金からなると共に表面にスズメッキ層が形成される構成としたが、これに限られず、雌端子612は必要に応じて任意の金属からなる構成としてもよい。
(7)実施形態6-1においては、端子にはインシュレーションバレル616が形成される構成としたが、インシュレーションバレル616は省略してもよい。
(9)実施形態6-1においては、樹脂リング623は円環状をなす構成としたが、これに限られず、例えば、樹脂リング623にはスリットを形成し、断面形状が略C字状をなす形態としてもよい。これにより、樹脂リング623は容易に拡径可能となるので、例えば、端子を電線611に圧着した後に、樹脂リング623を拡径させて、電線611に外嵌させることができる。
また、径大部629は複数形成されるものでもよい。例えば、インシュレーションバレル616及び樹脂リング623の間について熱収縮チューブ624を絶縁被覆614に密着させることができる場合には、熱収縮チューブ624のうちインシュレーションバレル616の部分及び樹脂リング623の部分のそれぞれについて径大部(複数の径大部)とすることができる。なお、径大部が複数ある場合には、全ての径大部をキャビティ632の外部に配するようにしてもよいが、複数の径大部のうち、より径の大きいものをキャビティ632の外部に配し、これよりも径の小さいものについては、キャビティ632の内部に収容(挿通)するようにしてもよい。
本明細書に開示された技術に係る相手側コネクタと嵌合可能なコネクタであって、前記コネクタは、芯線の外周を絶縁被覆で被覆してなる電線に端子が接続されてなる端子付き電線と、前記端子が挿通されるキャビティを有するコネクタハウジングと、を備え、前記端子が、前記絶縁被覆の端部から露出された前記芯線に圧着されたワイヤーバレルと、前記ワイヤーバレルの底板から延びる延出部と、を備えて構成され、前記延出部に合成樹脂をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端部の外面とに密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられているとともに、前記端子が前記キャビティの正規位置に挿通された状態では、前記止水被覆における前記端子の挿通方向と直交する方向の径が大きい径大部が前記キャビティの外部に配されているところに特徴を有する(手段1)。
本明細書に開示された技術によれば、電線側への水の浸入を防止することができる。
従来、端子付き電線として特開2000-285983号公報に記載のものが知られている。この端子付き電線は、芯線の外周を絶縁層で被覆した電線と、絶縁層から露出する芯線に接続された端子とを備える。前記芯線の接続部分は、端子が備えているワイヤーバレルによって圧着されている(かしめられている)。
電線702は、図74等に示されるように、複数本の金属細線を撚り合せてなる1本の芯線721と、この芯線721の外周を被覆する合成樹脂製の絶縁層722とを備える。芯線721を構成する材料としては、例えば、銅、銅合金、アルミニウム、アルミニウム合金等が挙げられ、必要に応じて任意の金属材料の中から適宜選択される。本実施形態においては、芯線721の材料として、アルミニウム又はアルミニウム合金が用いられている。電線702の末端部分の絶縁層722は除去されている。そのため、芯線721の末端部分は絶縁層722で覆われておらず、露出している。なお、他の実施形態においては、芯線721は単芯線であってもよい。
端子703は、所謂、雌型であり、相手側の雄型端子(不図示)と接続される。この端子703は、例えば、金属板材を所定形状にプレス加工することによって得られる。端子703を構成する金属材料としては、例えば、銅、銅合金等が挙げられ、必要に応じて任意の金属材料の中から適宜選択される。なお、本実施形態の端子703を構成する金属板材の表面には、メッキ層(不図示)が形成されている。メッキ層を構成する金属としては、例えば、スズ、ニッケル等が挙げられ、必要に応じて任意の金属材料の中から適宜選択される。本実施形態においては、端子703を構成する金属材料(銅又は銅合金)の表面にスズメッキ層が形成されている。他の実施形態においては、メッキ層が形成されていない金属板材を、端子703の材料として用いてもよい。
止水壁704は、図76に示されるような、所定形状に加工された樹脂加工物741を用いて製造される。本実施形態の樹脂加工物741は、略円柱状であり、前記余地部分736における底板731の内側に嵌るような形状に加工されている。この樹脂加工物741に使用される樹脂材料としては、例えば、対金属良接着性エラストマー(商品名:ペルプレン(登録商標)、東洋紡績株式会社)が挙げられる。この樹脂材料は、適度な剛性(弾性)を備えると共に、加熱処理によって金属に対して接着性を発現する。この樹脂材料からなる樹脂加工物741は、所定温度で加熱処理すると、全体としては形状(剛性)を維持しつつも、表面から溶融した液状の樹脂材料が滲み出してくる。この滲み出してきたもの(熱可塑性接着剤)が、金属に対して接着性を有する。例えば、前記樹脂材料における母材部分の融点は170℃程度であり、上記のように滲み出してくる部分(熱可塑性接着剤)の融点は120℃程度である。なお、常温(室温)下では、前記樹脂加工物741は、金属に対して接着性はなく、取り扱いやすい。このような樹脂加工物741は、例えば、前記樹脂材料を、押出成形装置を利用して細長い円柱状の成形物に押出成形し、その成形物を所定の大きさに切り分けることによって得られる。
止水被覆705は、筒状(チューブ状)であり、前記余地部分736から後側の前記端子703を、露出した前記芯線721の根元の絶縁層722と共に包囲するために被せられる。つまり、止水被覆705の先側の開口端部(周縁部)51は、止水壁704よりも先側に配置している。そして、上述したように、止水被覆705の開口端部(周縁部)751には、端子703の突起部738が内側から外側に向けて突き刺さっている。
次いで、本実施形態に係る端子付き電線701の製造工程の一例を示す。先ず、金属板材に対して打ち抜き工程を施すことにより、帯状をなすキャリア770と、このキャリア770の側縁に連結された複数個の端子片730とを形成する。つまり、複数個の端子片730が一括してキャリア770に接続されている。キャリア770には、長手方向に沿って略等間隔に並んだ送り孔771が形成されている。送り孔771としては、略円形状のものと、略矩形状のものとが交互に並べられている。この送り孔771は、加工機(不図示)に設けられた送り爪(不図示)が係合するように設定されている。
図88を参照しつつ、実施形態7-2に係る端子付き電線701Aについて説明する。本実施形態の端子付き電線701Aの基本的な構造は、上記実施形態7-1の端子付き電線701と同様である。そのため、同じ構造について同符号を付し、その詳細説明は省略する。本実施形態の端子付き電線701Aは、止水壁704Aが、端子703の底板731に対して、モールド(樹脂モールド)成形によって設けられている点が、上記実施形態7-1のものと異なっている。この止水壁704Aは、余地部分736における底板731を包むように設けられている。つまり、前記底板731の内側のみならず外側にも、止水壁704Aの一部が存在している。この止水壁704Aも、上記実施形態7-1と同様、筒状の止水被覆705内に完全に収容されている。なお、止水壁704Aは、電線702の軸方向からみた場合、略円形状であり、その外周面が止水被覆705の内周面と密着している。本発明の端子付き電線は、このような形態の止水壁704Aを備えるものであってもよい。
図89ないし図91を参照しつつ、実施形態7-3に係る端子付き電線701Bについて説明する。図89には、本実施形態で用いられる端子703Aが示されている。この端子703Aは、上記実施形態7-1の端子703対して、更に案内部739が設けられたものである。この案内部739は、端子703Aの余地部分736における底板731の両縁に、突起部738の後側に隣接するように突設されている。これらの案内部739は前記縁から、突起部738の先端に向かって傾斜するように細長く延びている。図89等に示されるように、案内部739の根元と、突起部738の根元とは互いに離れており、かつ案内部739の先端は、突起部738の先端と互いに近付くように配置している。本実施形態において、案内部739の高さは、突起部738の高さと略同じに設定されている。前記案内部739は、例えば、金属板材を打ち抜き加工して端子703Aを形成する際に設けられる。
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
本明細書に開示された技術に係る端子付き電線は、芯線と、この芯線の末端が露出するように前記芯線の外周を被覆する絶縁層とを有する電線と、内側に溝ができるように両縁が立ちつつ軸方向に沿って延び、先側に余地部分ができるように前記芯線の末端が載せられる底板と、この底板の両縁に延設された一対のワイヤーバレルと、前記底板の先側に延設され相手側と接続される先端部とを有し、前記ワイヤーバレルが前記底板上の芯線を抱きかかえるように前記芯線に圧着されて前記電線に取り付けられる端子と、前記余地部分から後側の前記端子を、露出した前記芯線の根元の絶縁層と共に包囲するために被せられる筒状の止水被覆と、を備える端子付き電線であって、前記余地部分の前記底板における両縁に、起立するように細長く延びた突起部を有し、前記突起部が、前記止水被覆を突き刺していることを特徴とする。
本明細書に開示された技術によれば、筒状の止水被覆を被せて位置決めしやすく、かつ防水性(止水性)に優れる端子付き電線、及び前記電線に取り付けられる端子を提供できる。
Claims (7)
- 芯線の外周を絶縁被覆で被覆してなる電線に端子が接続されてなる端子付き電線であって、
前記端子が、前記絶縁被覆の端部から露出された前記芯線が載置された底板を有すると共に前記芯線に圧着されたワイヤーバレルと、前記底板から延びる延出部と、を備えて構成され、
前記延出部に合成樹脂材をモールド成形してなる止水壁が設けられ、前記止水壁の外面に密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられている端子付き電線。 - 前記端子が、導電部材と接続される接続部と、前記絶縁被覆の端部から露出された前記芯線に圧着されたワイヤバレルと、前記接続部と前記ワイヤバレルとを接続する繋ぎ部と、を備えて構成され、
前記繋ぎ部に合成樹脂をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端部の外面とに密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられており、
前記止水壁には、同止水壁に連設され前記繋ぎ部の外面に沿って前記ワイヤバレル側に延びる連設部が一体に設けられており、この連設部は、前記芯線が延びる方向と直交する断面における樹脂の占有面積が前記止水壁の断面における樹脂の占有面積に比べて狭く設定されることで、撓み変形可能とされている請求の範囲第1項に記載の端子付き電線。 - 前記端子が、導電部材と接続される接続部と、前記絶縁被覆の端末から露出された前記芯線の端末に圧着されるワイヤバレルと、このワイヤバレルと前記接続部とを繋ぐ繋ぎ部とを備えて構成され、
前記繋ぎ部には合成樹脂材をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端末の外面とに密着して前記止水壁と前記絶縁被覆の端末との間に亘って前記芯線を覆う筒状の止水被覆が設けられており、
前記止水壁には、当該止水壁における前記芯線の先端と対向する面である後面から後方に離間した位置において圧着前の前記芯線の先端を当てる当て部が一体的に設けられ、
この当て部は、当該当て部の変位若しくは欠損を伴って前記芯線の先端が前進することを許容し、
かつ、前記当て部の前記止水壁の後面からの離間距離が、前記芯線の先端が前記当て部に当たった状態から前記芯線が伸びた場合に、前記芯線の先端が前記止水壁の後面に押圧力を作用させないか、若しくは前記止水壁の後面に到達しない距離に設定されている請求の範囲第1項に記載の端子付き電線。 - 芯線の外周を絶縁被覆で被覆してなる電線に端子が接続されてなる端子付き電線であって、
前記端子は、前記絶縁被覆の端部から露出された前記芯線に圧着されたワイヤーバレルと、前記ワイヤーバレルの底板から延びる延出部と、を備えて構成され、
前記延出部には、合成樹脂をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端部の外面とに密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられ、
前記延出部の幅方向の端部には、前記端部から突出する凸部、および前記端部よりも凹んだ凹み部のうち、少なくとも一方が形成されている請求の範囲第1項に記載の端子付き電線。 - 前記端子が、導電部材に接続される接続部と、前記絶縁被覆の端末から露出された前記芯線の端末に圧着されるワイヤバレルと、このワイヤバレルと前記接続部とを繋ぐ繋ぎ部とを備えて構成され、
前記繋ぎ部には合成樹脂材をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端末の外面とに密着して前記止水壁と前記絶縁被覆の端末との間に亘って前記芯線を覆う筒状の止水被覆が設けられており、
前記繋ぎ部における前記止水壁との境界面のうち少なくとも前記芯線が配置される側の面には、凹凸部が形成されている請求の範囲第1項に記載の端子付き電線。 - 相手側コネクタと嵌合可能なコネクタであって、
前記コネクタは、請求の範囲第1項に記載された端子付き電線と、前記端子が挿通されるキャビティを有するコネクタハウジングと、を備え、
前記端子が、前記絶縁被覆の端部から露出された前記芯線に圧着されたワイヤーバレルと、前記ワイヤーバレルの底板から延びる延出部と、を備えて構成され、
前記延出部に合成樹脂をモールド成形してなる止水壁が設けられ、この止水壁の外面と前記絶縁被覆の端部の外面とに密着して前記止水壁と前記絶縁被覆の端部との間に亘って前記芯線を覆う筒状の止水被覆が設けられているとともに、
前記端子が前記キャビティの正規位置に挿通された状態では、前記止水被覆における前記端子の挿通方向と直交する方向の径が大きい径大部が前記キャビティの外部に配されているコネクタ。 - 前記芯線の末端が前記絶縁被覆から露出しており、
前記端子は、内側に溝ができるように両縁が立ちつつ軸方向に沿って延び、先側に余地部分ができるように前記芯線の末端が載せられる底板と、この底板の両縁に延設された一対のワイヤーバレルと、前記底板の先側に延設され相手側と接続される先端部とを有し、前記ワイヤーバレルが前記底板上の芯線を抱きかかえるように前記芯線に圧着されて前記電線に取り付けられており、
前記余地部分から後側の前記端子を、露出した前記芯線の根元の絶縁層と共に包囲するために被せられる筒状の止水被覆を備え、
前記余地部分の前記底板における両縁に、起立するように細長く延びた突起部を有し、
前記突起部が、前記止水被覆を突き刺している請求の範囲第1項に記載の端子付き電線。
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DE112011102236T DE112011102236T5 (de) | 2010-08-06 | 2011-08-03 | Elektrischer Draht mit Anschluss und Verbinder |
US13/813,392 US9209615B2 (en) | 2010-08-06 | 2011-08-03 | Electric wire with terminal and connector |
CN201180039358.XA CN103069660B (zh) | 2010-08-06 | 2011-08-03 | 具有端子的电线及连接器 |
Applications Claiming Priority (16)
Application Number | Priority Date | Filing Date | Title |
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JP2010177645 | 2010-08-06 | ||
JP2010-177645 | 2010-08-06 | ||
JP2010201287A JP5510737B2 (ja) | 2010-09-08 | 2010-09-08 | 端子金具付き電線および端子金具 |
JP2010201337A JP5510741B2 (ja) | 2010-09-08 | 2010-09-08 | 端子金具付き電線及び端子金具 |
JP2010201288A JP5510738B2 (ja) | 2010-09-08 | 2010-09-08 | コネクタ |
JP2010201291A JP5510740B2 (ja) | 2010-09-08 | 2010-09-08 | 端子金具付き電線及び端子金具 |
JP2010-201337 | 2010-09-08 | ||
JP2010201289A JP5510739B2 (ja) | 2010-09-08 | 2010-09-08 | 端子金具付き電線および端子金具 |
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JP2010201338A JP5510742B2 (ja) | 2010-08-06 | 2010-09-08 | 端子金具、端子金具付き電線、連鎖端子及び端子金具付き電線の製造方法 |
JP2010-201338 | 2010-09-08 | ||
JP2010-248998 | 2010-11-05 | ||
JP2010248998A JP5664135B2 (ja) | 2010-11-05 | 2010-11-05 | 端子金具付き電線、及び端子金具 |
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PCT/JP2011/067777 WO2012018049A1 (ja) | 2010-08-06 | 2011-08-03 | 端子付き電線、及びコネクタ |
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- 2011-08-03 CN CN201180039358.XA patent/CN103069660B/zh not_active Expired - Fee Related
- 2011-08-03 WO PCT/JP2011/067777 patent/WO2012018049A1/ja active Application Filing
- 2011-08-03 DE DE112011102236T patent/DE112011102236T5/de not_active Ceased
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EP2626953A1 (en) * | 2012-02-10 | 2013-08-14 | AutoNetworks Technologies, Ltd. | Terminal fitting |
JP2013164951A (ja) * | 2012-02-10 | 2013-08-22 | Auto Network Gijutsu Kenkyusho:Kk | 端子金具 |
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US9502784B2 (en) | 2012-07-30 | 2016-11-22 | Yazaki Corporation | Terminal attached aluminum electric wire |
JP7339067B2 (ja) | 2019-08-22 | 2023-09-05 | 矢崎総業株式会社 | 端子付き電線、及び、端子金具 |
CN113224709A (zh) * | 2020-11-22 | 2021-08-06 | 马明珍 | 一种耐腐蚀的电力金具 |
CN113224709B (zh) * | 2020-11-22 | 2022-04-12 | 胜利油田恒源电气有限责任公司 | 一种耐腐蚀的电力金具 |
Also Published As
Publication number | Publication date |
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US20130126234A1 (en) | 2013-05-23 |
CN103069660A (zh) | 2013-04-24 |
DE112011102236T5 (de) | 2013-04-18 |
CN103069660B (zh) | 2016-03-09 |
US9209615B2 (en) | 2015-12-08 |
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