WO2020152962A1 - Terminal and joining method for terminal - Google Patents

Terminal and joining method for terminal Download PDF

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Publication number
WO2020152962A1
WO2020152962A1 PCT/JP2019/045438 JP2019045438W WO2020152962A1 WO 2020152962 A1 WO2020152962 A1 WO 2020152962A1 JP 2019045438 W JP2019045438 W JP 2019045438W WO 2020152962 A1 WO2020152962 A1 WO 2020152962A1
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WO
WIPO (PCT)
Prior art keywords
metal
terminal
metal wire
wire
columnar
Prior art date
Application number
PCT/JP2019/045438
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French (fr)
Japanese (ja)
Inventor
鈴木　雅教
Original Assignee
パナソニックＩｐマネジメント株式会社
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Priority to JP2020567382A priority Critical patent/JP6967720B2/en
Publication of WO2020152962A1 publication Critical patent/WO2020152962A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads
    • 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
    • H01R4/04—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 using electrically conductive adhesives
    • 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
    • H01R4/14—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 wrapping
    • 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 disclosure relates to a terminal and a method for joining the terminals.
  • Patent Document 1 discloses a terminal connected to a coil terminal (metal wire) by being wound around the coil terminal.
  • the metal wire is sandwiched by the sandwiching portions.
  • the metal wire may be separated from the sandwiching portion, and in this case, it becomes difficult to secure sufficient bonding strength between the metal wire and the terminal. From this, there is a demand to secure the bonding strength between the metal wire and the terminal.
  • an object of the present disclosure is to provide a terminal and a method for bonding the terminal that can secure the bonding strength between the metal terminal and the metal wire.
  • a terminal is a metal terminal, a metal wire having an insulating coating, and a metal wire electrically connected to the metal terminal.
  • An embedded portion made of a group of metal fine particles in which the wire is embedded, and an insulating layer that covers only the surface of the metal wire disposed in the embedded portion on the metal terminal side are provided.
  • a method of joining a terminal is a method of joining a terminal in which a metal terminal and a metal wire are electrically connected to each other, in which the metal wire having an insulating coating on the entire circumference is the metal terminal.
  • the metal fine particles are sprayed onto the metal wire to remove the insulating coating on the side opposite to the metal terminal of the metal wire, and leave the insulating coating on the metal terminal side of the metal wire as an insulating layer.
  • the metal wire and the metal terminal are electrically joined.
  • the bonding strength between the metal terminal and the metal wire can be secured.
  • FIG. 1 is a schematic diagram showing a terminal according to an embodiment.
  • FIG. 2 is a cross-sectional view showing the terminal according to the embodiment.
  • FIG. 3 is an explanatory diagram showing a state in which a metal wire is entangled with a columnar metal terminal according to the embodiment.
  • FIG. 4 is a flow chart showing a step of tying a metal wire around a columnar metal terminal according to the embodiment.
  • FIG. 5 is a diagram showing an assembly manufacturing process and a cold spray process according to the embodiment.
  • FIG. 6 is a front view showing a schematic configuration of the terminal according to the first modification.
  • FIG. 7 is a cross-sectional view showing a terminal according to Modification 1 in which a plurality of metal wires having different wire diameters are joined.
  • FIG. 8 is a sectional view showing a terminal according to the second modification.
  • FIG. 9 is a cross-sectional view showing a terminal according to Modification 3.
  • each diagram is a schematic diagram and is not necessarily an exact illustration. Further, in each drawing, substantially the same configurations are denoted by the same reference numerals, and overlapping description will be omitted or simplified.
  • FIG. 1 is a schematic diagram showing a terminal 1 according to the embodiment.
  • the terminal 1 is provided for a stator 100 that is a part of the motor.
  • the terminal 1 is provided on the plurality of coils 101 that form the stator 100.
  • the terminal 1 supplies power to the coil 101 from a circuit board mounted on a power supply unit that supplies power to the motor.
  • the terminal 1 includes a columnar metal terminal 10, a metal wire 20, and an embedded portion 30.
  • FIG. 2 is a sectional view showing the terminal 1 according to the embodiment. Specifically, FIG. 2 is a cross-sectional view of a section including the line II-II in FIG.
  • the pillar-shaped metal terminal 10 is a pillar-shaped metal terminal electrically connected to the coil 101.
  • the columnar metal terminal 10 is electrically connected to the metal wire 21 which is a part of the metal wire 20. Specifically, the columnar metal terminal 10 is joined to the metal wire 21 in a state where the metal wire 21 is wound.
  • the columnar metal terminal 10 is, for example, a member made of a metal whose main component is copper (Cu).
  • the columnar metal terminal 10 may be made of other metal, or may have a plating layer on its surface.
  • the metal wire 21 and the columnar metal terminal 10 are joined in a state where the metal wire 21 is entwined with the columnar metal terminal 10.
  • “to be entangled” means that the wire is wound around the target object, and the metal wires 21 are overlapped by the connection (intersection 23: FIG. 3). (See) exists.
  • the metal wire 21 is wound around the columnar metal terminal 10 in a single layer at a predetermined pitch.
  • the metal wire 21 may be wound around the pillar-shaped metal terminal 10 in multiple layers.
  • the columnar metal terminal 10 is, for example, a rectangle having a short side of about 0.4 mm and a long side of 0.6 mm when viewed in the axial direction. Further, in the metal wire 20, the wire diameter of the metal wire 21 is about 0.15 mm.
  • the columnar metal terminal 10 is a quadrangle when viewed in the axial direction.
  • the columnar metal terminal 10 is not limited to a quadrangle when viewed in the axial direction, and may have a polygonal shape other than a quadrangle, a circular shape, an elliptical shape, an oval shape, or the like.
  • the metal wire 21 constitutes a part of the metal wire 20 and is a metal wire material.
  • the metal wire 21 is formed of a metal whose main component is aluminum (Al).
  • the metal wires 21 form intersections 23 where the metal wires 21 overlap each other in the circumferential direction of the columnar metal terminal 10.
  • the intersecting portion 23 is formed so as to come into contact with either side surface of the columnar metal terminal 10.
  • the cross-sectional shape of the metal wire 21 is such that the first outer edge 211 on the columnar metal terminal 10 side has an arc shape, but the second outer edge 212 on the opposite side has a radius of curvature larger than that of the first outer edge 211. Is getting bigger. Therefore, the sectional shape of the metal wire 21 is a flat shape as a whole.
  • the embedding part 30 embeds the metal wire 21 wound around the columnar metal terminal 10 on the side surface of the columnar metal terminal 10. Specifically, the embedding portion 30 embeds the intersection portion 23 of the metal wire 21 and the portion wound around the columnar metal terminal 10.
  • the embedded portion 30 covers the portion of the metal wire 21 wound around the columnar metal terminal 10 in a continuous state over the entire circumference of the columnar metal terminal 10.
  • the embedded portion 30 has an outer surface having a concavo-convex shape that follows the portion of the metal wire 21 wound around the columnar metal terminal 10. That is, the embedded portion 30 has a convex shape in the portion corresponding to the metal wire 21, and the embedded portion 30 has a concave shape in the portion corresponding to the pitch interval of the metal wire 21.
  • the buried portion 30 is formed by the metal fine particle group 40 (see FIG. 5) sprayed by the cold spray method.
  • the insulating coating film 22 which is a part of the metal wire 20 covers the surface of the metal wire 21 on the columnar metal terminal 10 side. That is, the insulating layer 29 is arranged between the metal wire 21 and the columnar metal terminal 10.
  • the region of the metal wire 21 other than the surface on the side of the columnar metal terminal 10 is not covered with the insulating coating 22, but is directly covered with the embedded portion 30.
  • the metal wire 20 before joining has a metal wire 21 on which an insulating coating 22 made of an insulating resin is formed (see FIG. 5 ).
  • the metal wire 20 is, for example, an enamel wire, a lead wire, or the like.
  • the insulating coating 22 is made of a resin material such as urethane, polyester, polyester imide, or polyamide imide.
  • FIG. 3 is an explanatory diagram showing a state in which the metal wire 20 is entangled with the columnar metal terminal 10 according to the embodiment.
  • FIG. 3A shows a state in which the metal wire 20 is entangled with the columnar metal terminal 10 as seen from a direction orthogonal to the axial direction of the columnar metal terminal 10.
  • FIG. 3B shows a state in which the metal wire 20 is entwined with the columnar metal terminal 10 as viewed in the axial direction of the columnar metal terminal 10.
  • FIG. 4 is a flow chart showing a step of entwining the metal wire 20 around the columnar metal terminal 10 according to the embodiment.
  • the columnar metal terminal 10 is fixed to a jig (not shown). As a result, the columnar metal terminal 10 is in a state in which the metal wire 20 can be wound (S111). Then, the metal wire 20 is wound around the columnar metal terminal 10 while receiving a constant tension. Further, when the metal wire 20 is wound in the first turn and the second turn, it is wound around the columnar metal terminal 10 so as to overlap the winding start portion of the metal wire 20. As a result, the intersection portion 23 where the metal wires 20 intersect each other is formed (S112).
  • FIG. 5 is a diagram showing a process of making an assembly 200 and a cold spray process according to the embodiment.
  • the assembly 200 is subjected to a cold spray process by the cold spray method.
  • the embedded part 30 is formed by spraying the metal fine particle group 40 in the solid phase state from the nozzle 300 of the cold spray device onto the assembly 200.
  • the metal fine particle group 40 is heated at a lower temperature as compared with a general thermal spraying method.
  • the nozzle 300 is rotated with respect to the assembly 200 while spraying the metal fine particle group 40 (see arrow Y1 in FIG. 5).
  • the assembly 200 may be rotated while the nozzle 300 is fixed.
  • the metal fine particle group 40 is deposited on the columnar metal terminal 10 and the metal wire 20, and the embedded portion 30 is formed so as to be continuous over the entire circumference of the columnar metal terminal 10.
  • the metal fine particle group 40 by spraying the metal fine particle group 40, a part of the insulating coating 22 of the metal wire 20 is scraped and removed. Specifically, the portion of the insulating coating 22 on the side opposite to the columnar metal terminal 10 is removed.
  • the portion of the insulating coating film 22 on the columnar metal terminal 10 side remains as the insulating layer 29. Even if the insulating layer 29 remains, the metal wire 21 will be electrically connected to the columnar metal terminal 10 via the embedded portion 30.
  • the metal fine particle group 40 includes a plurality of metal fine particles having different hardness.
  • the metal fine particles having different hardness include a combination of tin (Sn) particles and nickel (Ni) particles. It should be noted that other metal fine particles may be included.
  • Hard metal fine particles are suitable for scraping the insulating coating 22, and soft metal fine particles are suitable because they are easily deposited. By mixing the hard metal particles and the soft metal particles in an appropriate ratio, it is possible to quickly scrape off the insulating coating 22 while ensuring the thickness of the embedded portion 30. Further, since the metal wire 21 is also shaved after the insulating film 22 is shaved, the metal wire 21 has a flat shape after the cold spray process (see FIG. 2 ).
  • the joining method of the terminal 1 is a joining method of the terminal 1 in which the columnar metal terminal 10 and the metal wire 21 are electrically connected to each other, and the metal wire having the insulating coating film 22 on the entire circumference.
  • the metal fine particle group 40 is sprayed on the metal wire 21 to remove the insulating coating film 22 on the side of the metal wire 21 opposite to the columnar metal terminal 10, and at the same time in the metal wire 21.
  • the metal wire 21 and the columnar metal terminal 10 are electrically connected.
  • the columnar metal terminal 10 and the metal wire 21 are electrically joined to each other via the embedded portion 30 composed of the metal fine particle group 40, the columnar metal terminal 10 and the metal wire 21 are not melted. However, it is possible to secure electrical connection between the two. Further, since the metal wire 21 is buried in the buried portion 30, the metal wire 21 can be fixed to the columnar metal terminal 10. Therefore, the bonding strength between the columnar metal terminal 10 and the metal wire 21 can be secured.
  • the portion of the metal wire 21 from which the insulating coating 22 is removed is covered with the buried portion 30, it is not in contact with the atmosphere (particularly humidity), and the electrolytic corrosion of the portion is suppressed.
  • the insulating layer 29 covers the surface of the metal wire 21 on the columnar metal terminal 10 side, the surface of the metal wire 21 is not in contact with the columnar metal terminal 10, and the surface is not corroded. It is suppressed. Since the electrolytic corrosion of the metal wire 21 is suppressed in this manner, the bonding strength between the columnar metal terminal 10 and the metal wire 21 can be maintained for a long period of time.
  • the metal fine particle group 40 has a plurality of metal fine particles having different hardness.
  • hard metal fine particles are suitable for shaving the insulating film 22, and soft metal fine particles are suitable because they are easily deposited. Since the plurality of metal fine particles having different hardnesses are included in the metal fine particle group 40, the insulating coating film 22 can be rapidly scraped while ensuring the thickness of the embedded portion 30.
  • each element of the metal fine particle group 40 that constitutes the buried portion 30 by using a well-known analysis method such as cross-sectional element analysis for the buried portion 30 after joining.
  • the metal wire 21 has at least one intersection 23 connected to the columnar metal terminal 10 and is wound around the columnar metal terminal, and the intersection 23 is embedded in the embedding portion 30.
  • the metal wire 21 is formed of a metal whose main component is aluminum.
  • the metal wire 21 is formed of a metal having a high ionization tendency as a main component, electrolytic corrosion is suppressed by the embedded portion 30 and the insulating layer 29, and therefore the columnar metal It is possible to maintain the bonding strength between the terminal 10 and the metal wire 21 for a long period of time.
  • Modification 1 In the above embodiment, the case where one metal wire 20 is wound around and joined to the columnar metal terminal 10 is illustrated. However, a plurality of metal wires may be wound around the columnar metal terminal. In this modification 1, as an example, a case where two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a is illustrated. In the following description, the same parts as those in the above-described embodiment may be designated by the same reference numerals and the description thereof may be omitted.
  • FIG. 6 is a front view showing a schematic configuration of the terminal 1A according to the first modification. Specifically, FIG. 6 shows a state of the terminal 1A before the metal fine particle group 40 is sprayed.
  • two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a of the terminal 1A. Specifically, the two metal wires 20a1 and 20a2 have intersecting portions 23a1 and 23a2, respectively, and these intersecting portions 23a1 and 23a2 are arranged at positions that do not overlap each other. Further, the two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a in a double spiral shape so as not to overlap each other, and are joined to the columnar metal terminal 10a.
  • a plurality of metal wires 20a1 and 20a2 are provided, and each of them is wound around the columnar metal terminal 10a. Accordingly, by winding the plurality of metal wires 20a1 and 20a2 around one columnar metal terminal 10a, the columnar metal terminal 10a can be shared.
  • the wire diameters of the plurality of metal wires 20a1 and 20a2 may be the same or different.
  • the wire diameters of the metal wires provided in each of the plurality of metal wires 20a1 and 20a2 may be the same or different.
  • FIG. 7 is a cross-sectional view showing a terminal 1A according to Modification 1, in which a plurality of metal wires 20a1 and 20a2 having different wire diameters are joined.
  • FIG. 7 shows the terminal 1A on which the embedded portion 30a is formed by spraying the metal fine particle group 40.
  • the metal wires 21a1 and 21a2 are electrically joined to the columnar metal terminal 10a via the embedded portion 30a.
  • the case where the wire diameter of the metal wire 21a1 is larger than that of the metal wire 21a2 is illustrated.
  • the metal wires 21a1 and 21a2 have a circular cross-sectional shape in the state before the metal fine particle group 40 is sprayed, but are scraped by being sprayed with the metal fine particle group 40 and have a flat cross-sectional shape.
  • the surfaces of the metal wires 21a1 and 21a2 on the columnar metal terminal 10 side are covered with the insulating layers 29a1 and 29a2, and the other portions are in direct contact with the embedded portion 30a.
  • the outer surface of the embedded portion 30a has an uneven shape that follows the portions of the metal wires 21a1 and 21a2 that are wound around the columnar metal terminal 10a. That is, the embedded portion 30a is convex in the portions corresponding to the metal wires 21a1 and 21a2, and the embedded portion 30a is concave in the portions corresponding to the pitch intervals of the metal wires 21a1 and 21a2. Further, in the convex portion of the embedded portion 30a, the apex of the portion corresponding to the metal wire 21a1 having a large wire diameter is located farther from the columnar metal terminal 10a than the apex of the portion corresponding to the metal wire 21a2 having a small wire diameter. Has become.
  • FIG. 8 is a cross-sectional view showing a terminal 1B according to Modification 2.
  • the metal wire 20b provided in the terminal 1B is wound around the columnar metal terminal 10b so as not to have a pitch interval. Due to this winding state, even if the metal fine particle group 40 is blown, a space where the metal fine particle group 40 does not reach the columnar metal terminal 10b is generated in the winding portion of the metal wire 21b. Therefore, the space becomes the void 59 after the embedded portion 30b is formed. Specifically, the void 59 is provided between the insulating layer 29b and the columnar metal terminal 10b.
  • the cushioning property of the terminal 1B can be enhanced. As a result, it is possible to absorb the shock and suppress the disconnection of the metal wire 21b.
  • the columnar metal terminal 10 is exemplified as the metal terminal and described.
  • the shape of the metal terminal may not be columnar.
  • a terminal 1C having a plate-shaped metal terminal 10c as a metal terminal will be described.
  • FIG. 9 is a cross-sectional view showing a terminal 1C according to Modification 3.
  • the plate-shaped metal terminal 10c of the terminal 1C is a plate-shaped metal terminal.
  • the plate-shaped metal terminal 10c is, for example, a member made of a metal whose main component is copper (Cu).
  • the plate-shaped metal terminal 10c may be made of other metal, or may have a plating layer on its surface.
  • the metal wire 20c is electrically joined to one main surface of the plate-shaped metal terminal 10c via the embedded portion 30c.
  • one end of the metal wire 20c having the metal wire 21c covered with the insulating coating 22c over the entire length is arranged on one main surface of the plate-shaped metal terminal 10c.
  • the metal fine particle group 40 is sprayed toward the one end by the cold spray method.
  • the metal fine particle group 40 is deposited, so that the embedded portion 30c is formed on the plate-shaped metal terminal 10c so as to cover one end of the metal wire 21c.
  • a part of the insulating coating 22c of the metal wire 20c is shaved and removed.
  • the portion of the insulating coating 22c on the plate-shaped metal terminal 10c side remains as the insulating layer 29c. Even if the insulating layer 29c remains, the metal wire 21c is electrically connected to the plate-shaped metal terminal 10c via the embedded portion 30c.
  • Other shapes of the metal terminal include, for example, a block shape.

Abstract

This terminal (1) is provided with: a columnar metal terminal (10); metal wires (21) having insulating coating films (22); an embedded part (30) comprising a metal fine particle group (40) in which metal wires (21) are embedded on the columnar metal terminal (10) for electrically joining the metal wires (21) to the columnar metal terminal (10); and insulating layers (29) that cover only the columnar metal terminal (10)-side surfaces of the metal wires (21) disposed in the embedded part (30).

Description

端子及び端子の接合方法Terminal and method of joining terminals
　本開示は、端子及び端子の接合方法に関する。 The present disclosure relates to a terminal and a method for joining the terminals.
　従来、コイル端末（金属線）が巻き付けられることで当該コイル端末に接続された端子が特許文献１に開示されている。この端子では、金属線の強度を確保するために、金属線が挟持部によって挟まれている。 Conventionally, Patent Document 1 discloses a terminal connected to a coil terminal (metal wire) by being wound around the coil terminal. In this terminal, in order to secure the strength of the metal wire, the metal wire is sandwiched by the sandwiching portions.
特開平１１－１８６０２３号公報Japanese Patent Laid-Open No. 11-186023
　しかしながら、従来の端子では、挟持部から金属線が離間することもあり、この場合、金属線と端子との接合強度を十分に確保し難くなる。このことから、金属線と端子との接合強度を確保したいという要望がある。 However, in the conventional terminal, the metal wire may be separated from the sandwiching portion, and in this case, it becomes difficult to secure sufficient bonding strength between the metal wire and the terminal. From this, there is a demand to secure the bonding strength between the metal wire and the terminal.
　そこで本開示は、金属端子と金属線との接合強度を確保することができる端子及び端子の接合方法を提供することを目的とする。 Therefore, an object of the present disclosure is to provide a terminal and a method for bonding the terminal that can secure the bonding strength between the metal terminal and the metal wire.
　上記目的を達成するために、本開示の一形態に係る端子は、金属端子と、絶縁被膜を有する金属線と、金属端子に対して金属線を電気的に接合するため、金属端子上で金属線を埋設した金属微粒子群からなる埋設部と、埋設部に配置された金属線における金属端子側の表面のみを覆う絶縁層と、を備える。 In order to achieve the above object, a terminal according to an aspect of the present disclosure is a metal terminal, a metal wire having an insulating coating, and a metal wire electrically connected to the metal terminal. An embedded portion made of a group of metal fine particles in which the wire is embedded, and an insulating layer that covers only the surface of the metal wire disposed in the embedded portion on the metal terminal side are provided.
　また、本開示の一形態に係る端子の接合方法は、金属端子と金属線とが電気的に接続された端子の接合方法であって、全周に絶縁被膜を有する前記金属線を前記金属端子上に配置した後に、金属線に対して金属微粒子群を吹き付けて金属線における金属端子とは反対側の前記絶縁被膜を除去するとともに、金属線における金属端子側の絶縁被膜を絶縁層として残存させながら、金属微粒子群からなる埋設部で金属線を埋設することで、金属線と金属端子とを電気的に接合する。 A method of joining a terminal according to an aspect of the present disclosure is a method of joining a terminal in which a metal terminal and a metal wire are electrically connected to each other, in which the metal wire having an insulating coating on the entire circumference is the metal terminal. After arranging on top, the metal fine particles are sprayed onto the metal wire to remove the insulating coating on the side opposite to the metal terminal of the metal wire, and leave the insulating coating on the metal terminal side of the metal wire as an insulating layer. On the other hand, by embedding the metal wire in the embedding part composed of the metal fine particle group, the metal wire and the metal terminal are electrically joined.
　本開示によれば、金属端子と金属線との接合強度を確保することができる。 According to the present disclosure, the bonding strength between the metal terminal and the metal wire can be secured.
図１は、実施の形態に係る端子を示す概略図である。FIG. 1 is a schematic diagram showing a terminal according to an embodiment. 図２は、実施の形態に係る端子を示す断面図である。FIG. 2 is a cross-sectional view showing the terminal according to the embodiment. 図３は、実施の形態に係り、柱状金属端子に金属ワイヤを絡げた状態を示す説明図である。FIG. 3 is an explanatory diagram showing a state in which a metal wire is entangled with a columnar metal terminal according to the embodiment. 図４は、実施の形態に係り、柱状金属端子に金属ワイヤを絡げる工程を示すフロー図である。FIG. 4 is a flow chart showing a step of tying a metal wire around a columnar metal terminal according to the embodiment. 図５は、実施の形態に係り、組立品の作成及びコールドスプレー工程を示す図である。FIG. 5 is a diagram showing an assembly manufacturing process and a cold spray process according to the embodiment. 図６は、変形例１に係る端子の概略構成を示す正面図である。FIG. 6 is a front view showing a schematic configuration of the terminal according to the first modification. 図７は、変形例１に係る端子であって、線径の異なる複数の金属ワイヤが接合された状態を示す断面図である。FIG. 7 is a cross-sectional view showing a terminal according to Modification 1 in which a plurality of metal wires having different wire diameters are joined. 図８は、変形例２に係る端子を示す断面図である。FIG. 8 is a sectional view showing a terminal according to the second modification. 図９は、変形例３に係る端子を示す断面図である。FIG. 9 is a cross-sectional view showing a terminal according to Modification 3.
　以下、本開示の実施の形態について、図面を参照しながら説明する。以下で説明する実施の形態は、いずれも包括的又は具体的な例を示すものである。以下の実施の形態で示される数値、形状、材料、構成要素、構成要素の配置位置及び接続形態、ステップ、ステップの順序などは、一例であり、本開示を限定する主旨ではない。また、以下の実施の形態における構成要素のうち、最上位概念を示す独立請求項に記載されていない構成要素については、任意の構成要素として説明される。 Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are examples, and are not intended to limit the present disclosure. Further, among the constituent elements in the following embodiments, constituent elements not described in the independent claim showing the highest concept are described as arbitrary constituent elements.
　なお、各図は、模式図であり、必ずしも厳密に図示されたものではない。また、各図において、実質的に同一の構成に対しては同一の符号を付しており、重複する説明は省略又は簡略化する。 Note that each diagram is a schematic diagram and is not necessarily an exact illustration. Further, in each drawing, substantially the same configurations are denoted by the same reference numerals, and overlapping description will be omitted or simplified.
　以下、本開示の実施の形態に係る端子及び端子の接合方法について説明する。 Hereinafter, a terminal and a method of joining the terminal according to the embodiment of the present disclosure will be described.
　［構成］
　図１は、実施の形態に係る端子１を示す概略図である。図１に示すように、端子１は、モータの一部であるステータ１００に対して設けられている。具体的には、端子１は、ステータ１００を構成する複数のコイル１０１に設けられている。端子１は、モータに対して電力を供給する電源部に搭載された回路基板からコイル１０１に電力供給を行う。端子１は、柱状金属端子１０と、金属ワイヤ２０と、埋設部３０とを備えている。 [Constitution]
FIG. 1 is a schematic diagram showing a terminal 1 according to the embodiment. As shown in FIG. 1, the terminal 1 is provided for a stator 100 that is a part of the motor. Specifically, the terminal 1 is provided on the plurality of coils 101 that form the stator 100. The terminal 1 supplies power to the coil 101 from a circuit board mounted on a power supply unit that supplies power to the motor. The terminal 1 includes a columnar metal terminal 10, a metal wire 20, and an embedded portion 30.
　図２は、実施の形態に係る端子１を示す断面図である。具体的には、図２は、図１におけるＩＩ－ＩＩ線を含む切断面を見た断面図である。 FIG. 2 is a sectional view showing the terminal 1 according to the embodiment. Specifically, FIG. 2 is a cross-sectional view of a section including the line II-II in FIG.
　図２に示すように、柱状金属端子１０は、コイル１０１と電気的に接続された柱状の金属端子である。柱状金属端子１０は、金属ワイヤ２０の一部である金属線２１と電気的に接続されている。具体的には、柱状金属端子１０は、金属線２１が巻き付けられた状態で金属線２１に対して接合されている。柱状金属端子１０は、例えば、銅（Ｃｕ）を主成分とする金属からなる部材である。なお、柱状金属端子１０は、その他の金属から形成されていてもよいし、その表面にメッキ層を有していてもよい。 As shown in FIG. 2, the pillar-shaped metal terminal 10 is a pillar-shaped metal terminal electrically connected to the coil 101. The columnar metal terminal 10 is electrically connected to the metal wire 21 which is a part of the metal wire 20. Specifically, the columnar metal terminal 10 is joined to the metal wire 21 in a state where the metal wire 21 is wound. The columnar metal terminal 10 is, for example, a member made of a metal whose main component is copper (Cu). The columnar metal terminal 10 may be made of other metal, or may have a plating layer on its surface.
　本実施の形態では、金属線２１が柱状金属端子１０に絡げられた状態で、金属線２１と柱状金属端子１０とが接合されている。ここで「絡げる」とは、対象物に対して線材が巻き付けられた状態で結ばれていることをいい、結わえられたことで金属線２１同士が重なった部分（交差部２３：図３参照）が存在していることをいう。金属線２１は、所定のピッチ間隔をあけて柱状金属端子１０に対して一重で巻き付けられている。なお、金属線２１は、柱状金属端子１０に対して多重で巻き付けられていてもよい。 In the present embodiment, the metal wire 21 and the columnar metal terminal 10 are joined in a state where the metal wire 21 is entwined with the columnar metal terminal 10. Here, "to be entangled" means that the wire is wound around the target object, and the metal wires 21 are overlapped by the connection (intersection 23: FIG. 3). (See) exists. The metal wire 21 is wound around the columnar metal terminal 10 in a single layer at a predetermined pitch. The metal wire 21 may be wound around the pillar-shaped metal terminal 10 in multiple layers.
　柱状金属端子１０は、例えば、軸方向視において短辺が約０．４ｍｍ、長辺が０．６ｍｍの長方形である。また、金属ワイヤ２０では、金属線２１の線径が約０．１５ｍｍである。 The columnar metal terminal 10 is, for example, a rectangle having a short side of about 0.4 mm and a long side of 0.6 mm when viewed in the axial direction. Further, in the metal wire 20, the wire diameter of the metal wire 21 is about 0.15 mm.
　柱状金属端子１０は、軸方向視において四角形である。なお、柱状金属端子１０は、軸方向視において四角形であることに限定されず、例えば、四角形以外の多角形状、円形状、楕円形状、長円形状などであってもよい。 The columnar metal terminal 10 is a quadrangle when viewed in the axial direction. The columnar metal terminal 10 is not limited to a quadrangle when viewed in the axial direction, and may have a polygonal shape other than a quadrangle, a circular shape, an elliptical shape, an oval shape, or the like.
　金属線２１は、金属ワイヤ２０の一部を構成し、金属製の線材である。具体的には、金属線２１は、アルミニウム（Ａｌ）を主成分とする金属から形成されている。金属線２１は、当該金属線２１同士が柱状金属端子１０の周方向に重なりあう交差部２３を形成している。交差部２３は、柱状金属端子１０のいずれかの側面と接触するように形成されている。図２に示すように、金属線２１の断面形状は、柱状金属端子１０側の第一外縁２１１が円弧状であるが、その反対側の第二外縁２１２は、第一外縁２１１よりも曲率半径が大きくなっている。このため、金属線２１の断面形状は、全体として偏平な形状となっている。 The metal wire 21 constitutes a part of the metal wire 20 and is a metal wire material. Specifically, the metal wire 21 is formed of a metal whose main component is aluminum (Al). The metal wires 21 form intersections 23 where the metal wires 21 overlap each other in the circumferential direction of the columnar metal terminal 10. The intersecting portion 23 is formed so as to come into contact with either side surface of the columnar metal terminal 10. As shown in FIG. 2, the cross-sectional shape of the metal wire 21 is such that the first outer edge 211 on the columnar metal terminal 10 side has an arc shape, but the second outer edge 212 on the opposite side has a radius of curvature larger than that of the first outer edge 211. Is getting bigger. Therefore, the sectional shape of the metal wire 21 is a flat shape as a whole.
　埋設部３０は、柱状金属端子１０に巻き付けられた金属線２１を、当該柱状金属端子１０の側面上で埋設している。具体的には、埋設部３０は、金属線２１における交差部２３と、柱状金属端子１０に巻き付けられた部分とを埋設している。埋設部３０は、柱状金属端子１０の全周にわたって連続した状態で、金属線２１における柱状金属端子１０に巻き付けられた部位を覆っている。埋設部３０は、その外表面が、金属線２１における柱状金属端子１０に巻き付けられた部位に倣った凹凸形状を有している。つまり、金属線２１に対応する部位においては埋設部３０は凸状となっており、金属線２１のピッチ間隔に対応する部位においては埋設部３０は凹状となっている。 The embedding part 30 embeds the metal wire 21 wound around the columnar metal terminal 10 on the side surface of the columnar metal terminal 10. Specifically, the embedding portion 30 embeds the intersection portion 23 of the metal wire 21 and the portion wound around the columnar metal terminal 10. The embedded portion 30 covers the portion of the metal wire 21 wound around the columnar metal terminal 10 in a continuous state over the entire circumference of the columnar metal terminal 10. The embedded portion 30 has an outer surface having a concavo-convex shape that follows the portion of the metal wire 21 wound around the columnar metal terminal 10. That is, the embedded portion 30 has a convex shape in the portion corresponding to the metal wire 21, and the embedded portion 30 has a concave shape in the portion corresponding to the pitch interval of the metal wire 21.
　埋設部３０は、コールドスプレー法によって吹き付けられた金属微粒子群４０（図５参照）によって形成されている。埋設部３０内においては、金属ワイヤ２０の一部である絶縁被膜２２が、金属線２１における柱状金属端子１０側の表面を覆っている。つまり、金属線２１と柱状金属端子１０との間には絶縁層２９が配置されている。金属線２１における柱状金属端子１０側の表面以外の領域は、絶縁被膜２２によって覆われておらず、埋設部３０によって直接的に覆われている。 The buried portion 30 is formed by the metal fine particle group 40 (see FIG. 5) sprayed by the cold spray method. In the embedded portion 30, the insulating coating film 22 which is a part of the metal wire 20 covers the surface of the metal wire 21 on the columnar metal terminal 10 side. That is, the insulating layer 29 is arranged between the metal wire 21 and the columnar metal terminal 10. The region of the metal wire 21 other than the surface on the side of the columnar metal terminal 10 is not covered with the insulating coating 22, but is directly covered with the embedded portion 30.
　［端子の接合方法］
　柱状金属端子１０への金属ワイヤ２０の接合方法について説明する。 [Terminal joining method]
A method of joining the metal wire 20 to the columnar metal terminal 10 will be described.
　まず、接合前の金属ワイヤ２０について説明をする。金属ワイヤ２０は、金属線２１に絶縁性の樹脂からなる絶縁被膜２２が形成されている（図５参照）。金属ワイヤ２０は、例えば、エナメル線、リード線等である。絶縁被膜２２は、例えばウレタン、ポリエステル、ポリエステルイミド、ポリアミドイミド等の樹脂材料で構成されている。 First, the metal wire 20 before joining will be described. The metal wire 20 has a metal wire 21 on which an insulating coating 22 made of an insulating resin is formed (see FIG. 5 ). The metal wire 20 is, for example, an enamel wire, a lead wire, or the like. The insulating coating 22 is made of a resin material such as urethane, polyester, polyester imide, or polyamide imide.
　図３は、実施の形態に係り、柱状金属端子１０に金属ワイヤ２０を絡げた状態を示す説明図である。図３の（ａ）は、柱状金属端子１０の軸方向と直交する方向から見た、柱状金属端子１０に金属ワイヤ２０を絡げた状態を示す。図３の（ｂ）は、柱状金属端子１０の軸方向から見た、柱状金属端子１０に金属ワイヤ２０を絡げた状態を示す。また、図４は、実施の形態に係り、柱状金属端子１０に金属ワイヤ２０を絡げる工程を示すフロー図である。 FIG. 3 is an explanatory diagram showing a state in which the metal wire 20 is entangled with the columnar metal terminal 10 according to the embodiment. FIG. 3A shows a state in which the metal wire 20 is entangled with the columnar metal terminal 10 as seen from a direction orthogonal to the axial direction of the columnar metal terminal 10. FIG. 3B shows a state in which the metal wire 20 is entwined with the columnar metal terminal 10 as viewed in the axial direction of the columnar metal terminal 10. Further, FIG. 4 is a flow chart showing a step of entwining the metal wire 20 around the columnar metal terminal 10 according to the embodiment.
　図３及び図４に示すように、まず、柱状金属端子１０は、図示しない治具に対して固定される。これにより、柱状金属端子１０は、金属ワイヤ２０を巻き付けることが可能な状態となる（Ｓ１１１）。その後、金属ワイヤ２０は、一定の張力を受けながら、柱状金属端子１０の周囲に対して巻き付けられる。また、金属ワイヤ２０は、１ターン目、２ターン目と巻き付けられる際には、金属ワイヤ２０における巻き始め箇所に重なるように柱状金属端子１０に巻き付けられる。これにより、金属ワイヤ２０同士が交差した交差部２３が形成される（Ｓ１１２）。 As shown in FIGS. 3 and 4, first, the columnar metal terminal 10 is fixed to a jig (not shown). As a result, the columnar metal terminal 10 is in a state in which the metal wire 20 can be wound (S111). Then, the metal wire 20 is wound around the columnar metal terminal 10 while receiving a constant tension. Further, when the metal wire 20 is wound in the first turn and the second turn, it is wound around the columnar metal terminal 10 so as to overlap the winding start portion of the metal wire 20. As a result, the intersection portion 23 where the metal wires 20 intersect each other is formed (S112).
　さらに、金属ワイヤ２０は柱状金属端子１０に対して数ターン巻き付けられる（Ｓ１１３）。金属ワイヤ２０は、交差部２３を除けば概ねコイル状となるように、柱状金属端子１０に巻き付けられることとなる。これにより、金属ワイヤ２０は柱状金属端子１０の側面上に配置された状態となる。その後、金属ワイヤ２０の不要な箇所がニッパ等で切断されて、金属ワイヤ２０が整えられることで、図５に示す組立品２００が得られる。図５は、実施の形態に係り、組立品２００の作成及びコールドスプレー工程を示す図である。 Further, the metal wire 20 is wound around the columnar metal terminal 10 for several turns (S113). The metal wire 20 is wound around the columnar metal terminal 10 so as to have a substantially coil shape except for the intersection 23. As a result, the metal wire 20 is placed on the side surface of the columnar metal terminal 10. After that, unnecessary parts of the metal wire 20 are cut with a nipper or the like, and the metal wire 20 is arranged, whereby the assembly 200 shown in FIG. 5 is obtained. FIG. 5 is a diagram showing a process of making an assembly 200 and a cold spray process according to the embodiment.
　図５に示すように、組立品２００が作成されると、当該組立品２００に対してコールドスプレー法によるコールドスプレー工程が施される。コールドスプレー工程では、組立品２００に対して、コールドスプレー装置のノズル３００から金属微粒子群４０を固相状態のままで吹き付けることで、埋設部３０を形成する。吹付け時においては、一般的な溶射法と比較して金属微粒子群４０を低い温度で加熱している。この工程では、金属微粒子群４０を吹き付けながらノズル３００を組立品２００に対して回転させる（図５の矢印Ｙ１参照）。なお、ノズル３００を固定した状態で、組立品２００を回転させてもよい。これにより、柱状金属端子１０及び金属ワイヤ２０上に金属微粒子群４０が堆積して、柱状金属端子１０の全周に連続するように埋設部３０が形成される。このとき、金属微粒子群４０が吹き付けられることで、金属ワイヤ２０の絶縁被膜２２の一部が削られ除去される。具体的には、絶縁被膜２２における柱状金属端子１０とは反対側の部分が除去される。一方、絶縁被膜２２における柱状金属端子１０側の部分は絶縁層２９として残存する。絶縁層２９が残存したとしても、金属線２１は、埋設部３０を介して柱状金属端子１０と電気的に接続されることとなる。 As shown in FIG. 5, when the assembly 200 is created, the assembly 200 is subjected to a cold spray process by the cold spray method. In the cold spray process, the embedded part 30 is formed by spraying the metal fine particle group 40 in the solid phase state from the nozzle 300 of the cold spray device onto the assembly 200. At the time of spraying, the metal fine particle group 40 is heated at a lower temperature as compared with a general thermal spraying method. In this step, the nozzle 300 is rotated with respect to the assembly 200 while spraying the metal fine particle group 40 (see arrow Y1 in FIG. 5). The assembly 200 may be rotated while the nozzle 300 is fixed. Thereby, the metal fine particle group 40 is deposited on the columnar metal terminal 10 and the metal wire 20, and the embedded portion 30 is formed so as to be continuous over the entire circumference of the columnar metal terminal 10. At this time, by spraying the metal fine particle group 40, a part of the insulating coating 22 of the metal wire 20 is scraped and removed. Specifically, the portion of the insulating coating 22 on the side opposite to the columnar metal terminal 10 is removed. On the other hand, the portion of the insulating coating film 22 on the columnar metal terminal 10 side remains as the insulating layer 29. Even if the insulating layer 29 remains, the metal wire 21 will be electrically connected to the columnar metal terminal 10 via the embedded portion 30.
　ここで、金属微粒子群４０には、硬さの異なる複数の金属微粒子が含まれている。硬さの異なる金属微粒子としては、錫（Ｓｎ）粒子とニッケル（Ｎｉ）粒子との組み合わせなどが挙げられる。なお、その他の金属微粒子が含まれていてもよい。硬い金属微粒子は、絶縁被膜２２を削るのに適しており、柔らかい金属微粒子は堆積しやすい点で適している。硬い金属微粒子と、柔らかい金属微粒子とを適切な割合で混合しておくことで、埋設部３０の厚みを確保しつつ、絶縁被膜２２を迅速に削ることが可能となる。また、絶縁被膜２２が削られた後には、金属線２１も削られるために、コールドスプレー工程後には金属線２１は偏平な形状となる（図２参照）。 Here, the metal fine particle group 40 includes a plurality of metal fine particles having different hardness. Examples of the metal fine particles having different hardness include a combination of tin (Sn) particles and nickel (Ni) particles. It should be noted that other metal fine particles may be included. Hard metal fine particles are suitable for scraping the insulating coating 22, and soft metal fine particles are suitable because they are easily deposited. By mixing the hard metal particles and the soft metal particles in an appropriate ratio, it is possible to quickly scrape off the insulating coating 22 while ensuring the thickness of the embedded portion 30. Further, since the metal wire 21 is also shaved after the insulating film 22 is shaved, the metal wire 21 has a flat shape after the cold spray process (see FIG. 2 ).
　［効果など］
　以上のように、本実施の形態に係る端子１は、柱状金属端子１０と、絶縁皮膜２２を有する金属線２１と、柱状金属端子１０に対して金属線２１を電気的に接合するため、柱状金属端子１０上で金属線２１を埋設した金属微粒子群４０からなる埋設部３０と、金属線２１における柱状金属端子１０側の表面のみを覆う絶縁層２９と、を備えている。 [Effects]
As described above, in the terminal 1 according to the present embodiment, since the columnar metal terminal 10, the metal wire 21 having the insulating film 22, and the metal wire 21 are electrically joined to the columnar metal terminal 10, An embedded portion 30 formed of a group of metal fine particles 40 in which the metal wire 21 is embedded on the metal terminal 10 and an insulating layer 29 that covers only the surface of the metal wire 21 on the side of the columnar metal terminal 10 are provided.
　また、本実施の形態に係る端子１の接合方法は、柱状金属端子１０と金属線２１とが電気的に接続された端子１の接合方法であって、全周に絶縁被膜２２を有する金属線２１を柱状金属端子１０上に配置した後に、金属線２１に対して金属微粒子群４０を吹き付けて金属線２１における柱状金属端子１０とは反対側の絶縁被膜２２を除去するとともに、金属線２１における柱状金属端子１０側の絶縁皮膜２２を絶縁層２９として残存させながら、金属微粒子群４０からなる埋設部３０で金属線２１を埋設することで、金属線２１と柱状金属端子１０とを電気的に接合する。 Further, the joining method of the terminal 1 according to the present embodiment is a joining method of the terminal 1 in which the columnar metal terminal 10 and the metal wire 21 are electrically connected to each other, and the metal wire having the insulating coating film 22 on the entire circumference. After arranging 21 on the columnar metal terminal 10, the metal fine particle group 40 is sprayed on the metal wire 21 to remove the insulating coating film 22 on the side of the metal wire 21 opposite to the columnar metal terminal 10, and at the same time in the metal wire 21. By embedding the metal wire 21 in the embedding portion 30 composed of the metal fine particle group 40 while leaving the insulating film 22 on the side of the columnar metal terminal 10 as the insulating layer 29, the metal wire 21 and the columnar metal terminal 10 are electrically connected. To join.
　これによれば、柱状金属端子１０と金属線２１とが、金属微粒子群４０からなる埋設部３０を介して電気的に接合されているので、柱状金属端子１０と金属線２１とを溶融しなくても両者の電気的接合を確保することができる。また、埋設部３０内に金属線２１が埋設されていることで、柱状金属端子１０に対して金属線２１を固定することができる。したがって、柱状金属端子１０と金属線２１との接合強度を確保することができる。 According to this, since the columnar metal terminal 10 and the metal wire 21 are electrically joined to each other via the embedded portion 30 composed of the metal fine particle group 40, the columnar metal terminal 10 and the metal wire 21 are not melted. However, it is possible to secure electrical connection between the two. Further, since the metal wire 21 is buried in the buried portion 30, the metal wire 21 can be fixed to the columnar metal terminal 10. Therefore, the bonding strength between the columnar metal terminal 10 and the metal wire 21 can be secured.
　さらに、金属線２１における絶縁被膜２２が除去された部分は、埋設部３０によって覆われているために、大気（特に湿気）に接しておらず、当該部分の電蝕が抑制されている。 Further, since the portion of the metal wire 21 from which the insulating coating 22 is removed is covered with the buried portion 30, it is not in contact with the atmosphere (particularly humidity), and the electrolytic corrosion of the portion is suppressed.
　一方、絶縁層２９は、金属線２１における柱状金属端子１０側の表面を覆っているために、当該金属線２１の表面は柱状金属端子１０に対して接しておらず、当該表面の電蝕が抑制されている。このように、金属線２１の電蝕が抑制されているので、柱状金属端子１０と金属線２１との接合強度を長期にわたって維持することが可能である。 On the other hand, since the insulating layer 29 covers the surface of the metal wire 21 on the columnar metal terminal 10 side, the surface of the metal wire 21 is not in contact with the columnar metal terminal 10, and the surface is not corroded. It is suppressed. Since the electrolytic corrosion of the metal wire 21 is suppressed in this manner, the bonding strength between the columnar metal terminal 10 and the metal wire 21 can be maintained for a long period of time.
　また、金属微粒子群４０は、硬さの異なる複数の金属微粒子を有する。 Further, the metal fine particle group 40 has a plurality of metal fine particles having different hardness.
　これによれば、硬い金属微粒子は、絶縁被膜２２を削るのに適しており、柔らかい金属微粒子は堆積しやすい点で適している。このような硬さの異なる複数の金属微粒子が金属微粒子群４０に含まれているので、埋設部３０の厚みを確保しつつ、絶縁被膜２２を迅速に削ることが可能となる。 According to this, hard metal fine particles are suitable for shaving the insulating film 22, and soft metal fine particles are suitable because they are easily deposited. Since the plurality of metal fine particles having different hardnesses are included in the metal fine particle group 40, the insulating coating film 22 can be rapidly scraped while ensuring the thickness of the embedded portion 30.
　なお、接合後における埋設部３０に対して、周知の断面元素分析などの分析法を用いることで、埋設部３０を構成する金属微粒子群４０の各元素を特定することが可能である。 Note that it is possible to specify each element of the metal fine particle group 40 that constitutes the buried portion 30 by using a well-known analysis method such as cross-sectional element analysis for the buried portion 30 after joining.
　また、金属線２１は、柱状金属端子１０に結ばれた少なくとも一つの交差部２３を有し、柱状金属端子に対して巻かれており、交差部２３は、埋設部３０に埋設されている。 Further, the metal wire 21 has at least one intersection 23 connected to the columnar metal terminal 10 and is wound around the columnar metal terminal, and the intersection 23 is embedded in the embedding portion 30.
　これによれば、交差部２３が埋設部３０に埋設されているので、交差部２３を柱状金属端子１０に対して強固に接合することが可能である。 According to this, since the intersecting portion 23 is embedded in the embedding portion 30, it is possible to firmly bond the intersecting portion 23 to the columnar metal terminal 10.
　また、金属線２１は、アルミニウムを主成分とした金属で形成されている。 Moreover, the metal wire 21 is formed of a metal whose main component is aluminum.
　これによれば、イオン化傾向の高いアルミニウムを主成分とした金属で金属線２１が形成されている場合であっても、埋設部３０及び絶縁層２９によって電蝕が抑制されているので、柱状金属端子１０と金属線２１との接合強度を長期にわたって維持することが可能である。 According to this, even when the metal wire 21 is formed of a metal having a high ionization tendency as a main component, electrolytic corrosion is suppressed by the embedded portion 30 and the insulating layer 29, and therefore the columnar metal It is possible to maintain the bonding strength between the terminal 10 and the metal wire 21 for a long period of time.
　［変形例１］
　上記実施の形態では、一本の金属ワイヤ２０が柱状金属端子１０に巻き付けられて接合されている場合を例示した。しかしながら、柱状金属端子に対して複数の金属ワイヤが巻き付けられていてもよい。この変形例１では、一例として二本の金属ワイヤ２０ａ１、２０ａ２が柱状金属端子１０ａに巻き付けられている場合を例示する。なお、以降の説明において、上記実施の形態と同一の部分については、同一の符号を付してその説明を省略する場合がある。 [Modification 1]
In the above embodiment, the case where one metal wire 20 is wound around and joined to the columnar metal terminal 10 is illustrated. However, a plurality of metal wires may be wound around the columnar metal terminal. In this modification 1, as an example, a case where two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a is illustrated. In the following description, the same parts as those in the above-described embodiment may be designated by the same reference numerals and the description thereof may be omitted.
　図６は、変形例１に係る端子１Ａの概略構成を示す正面図である。具体的には図６は金属微粒子群４０が吹き付けられる前の端子１Ａの状態を示している。図６に示すように、端子１Ａの柱状金属端子１０ａには、二本の金属ワイヤ２０ａ１、２０ａ２が巻き付けられている。具体的には、二本の金属ワイヤ２０ａ１、２０ａ２は、それぞれ交差部２３ａ１、２３ａ２を有しており、これらの交差部２３ａ１、２３ａ２は互いに重ならない位置に配置されている。また、二本の金属ワイヤ２０ａ１、２０ａ２は、互いに重ならないように、二重の螺旋状に柱状金属端子１０ａに巻き付けられて、柱状金属端子１０ａに対して接合されている。 FIG. 6 is a front view showing a schematic configuration of the terminal 1A according to the first modification. Specifically, FIG. 6 shows a state of the terminal 1A before the metal fine particle group 40 is sprayed. As shown in FIG. 6, two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a of the terminal 1A. Specifically, the two metal wires 20a1 and 20a2 have intersecting portions 23a1 and 23a2, respectively, and these intersecting portions 23a1 and 23a2 are arranged at positions that do not overlap each other. Further, the two metal wires 20a1 and 20a2 are wound around the columnar metal terminal 10a in a double spiral shape so as not to overlap each other, and are joined to the columnar metal terminal 10a.
　このように、金属ワイヤ２０ａ１、２０ａ２は、複数本設けられており、それぞれが柱状金属端子１０ａに対して巻き付けられている。これにより、複数の金属ワイヤ２０ａ１、２０ａ２を一つの柱状金属端子１０ａに巻き付けることで、柱状金属端子１０ａを共通化することができる。 In this way, a plurality of metal wires 20a1 and 20a2 are provided, and each of them is wound around the columnar metal terminal 10a. Accordingly, by winding the plurality of metal wires 20a1 and 20a2 around one columnar metal terminal 10a, the columnar metal terminal 10a can be shared.
　ここで、複数の金属ワイヤ２０ａ１、２０ａ２の線径は、同じであっても異なっていてもよい。具体的には、複数の金属ワイヤ２０ａ１、２０ａ２のそれぞれに備わる金属線の線径は、同じであっても異なっていてもよい。 Here, the wire diameters of the plurality of metal wires 20a1 and 20a2 may be the same or different. Specifically, the wire diameters of the metal wires provided in each of the plurality of metal wires 20a1 and 20a2 may be the same or different.
　図７は、変形例１に係る端子１Ａであって、線径の異なる複数の金属ワイヤ２０ａ１、２０ａ２が接合された状態を示す断面図である。図７では、金属微粒子群４０が吹き付けられて埋設部３０ａが形成された端子１Ａを示している。 FIG. 7 is a cross-sectional view showing a terminal 1A according to Modification 1, in which a plurality of metal wires 20a1 and 20a2 having different wire diameters are joined. FIG. 7 shows the terminal 1A on which the embedded portion 30a is formed by spraying the metal fine particle group 40.
　図７に示すように、線径の異なる複数の金属ワイヤ２０ａ１、２０ａ２では、金属線２１ａ１、２１ａ２が埋設部３０ａを介して柱状金属端子１０ａと電気的に接合されている。ここでは、金属線２１ａ１の線径が、金属線２１ａ２よりも大きい場合を例示している。また、金属線２１ａ１、２１ａ２は、金属微粒子群４０が吹き付けられる前の状態では円形断面状であるが、金属微粒子群４０が吹き付けられることで削られ、偏平な断面形状となっている。また、金属線２１ａ１、２１ａ２の柱状金属端子１０側の表面は、絶縁層２９ａ１、２９ａ２によって覆われ、その他の部分は埋設部３０ａに直接的に接している。 As shown in FIG. 7, in the plurality of metal wires 20a1 and 20a2 having different wire diameters, the metal wires 21a1 and 21a2 are electrically joined to the columnar metal terminal 10a via the embedded portion 30a. Here, the case where the wire diameter of the metal wire 21a1 is larger than that of the metal wire 21a2 is illustrated. Further, the metal wires 21a1 and 21a2 have a circular cross-sectional shape in the state before the metal fine particle group 40 is sprayed, but are scraped by being sprayed with the metal fine particle group 40 and have a flat cross-sectional shape. Further, the surfaces of the metal wires 21a1 and 21a2 on the columnar metal terminal 10 side are covered with the insulating layers 29a1 and 29a2, and the other portions are in direct contact with the embedded portion 30a.
　埋設部３０ａは、その外表面が、金属線２１ａ１、２１ａ２における柱状金属端子１０ａに巻き付けられた部位に倣った凹凸形状を有している。つまり、金属線２１ａ１、２１ａ２に対応する部位においては埋設部３０ａは凸状となっており、金属線２１ａ１、２１ａ２のピッチ間隔に対応する部位においては埋設部３０ａは凹状となっている。また、埋設部３０ａの凸状部において、線径の大きい金属線２１ａ１に対応する部分の頂点は、線径の小さい金属線２１ａ２に対応する部分の頂点よりも、柱状金属端子１０ａから離れた位置となっている。 The outer surface of the embedded portion 30a has an uneven shape that follows the portions of the metal wires 21a1 and 21a2 that are wound around the columnar metal terminal 10a. That is, the embedded portion 30a is convex in the portions corresponding to the metal wires 21a1 and 21a2, and the embedded portion 30a is concave in the portions corresponding to the pitch intervals of the metal wires 21a1 and 21a2. Further, in the convex portion of the embedded portion 30a, the apex of the portion corresponding to the metal wire 21a1 having a large wire diameter is located farther from the columnar metal terminal 10a than the apex of the portion corresponding to the metal wire 21a2 having a small wire diameter. Has become.
　このように、複数の金属線２１ａ１、２１ａ２の線径が異なっていても、埋設部３０ａによって確実に柱状金属端子１０ａに接合し、電気的な導通を確保することが可能である。 As described above, even if the wire diameters of the plurality of metal wires 21a1 and 21a2 are different from each other, it is possible to securely bond the metal wires 21a1 and 21a2 to the columnar metal terminal 10a by the embedded portion 30a and ensure electrical continuity.
　［変形例２］
　上記実施の形態では、金属線２１が所定のピッチ間隔をあけて柱状金属端子１０に対して巻き付けられている場合を例示した。この変形例２では、金属ワイヤ２０ｂがピッチ間隔をあけずに柱状金属端子１０に対して巻き付けられている場合について説明する。 [Modification 2]
In the above-mentioned embodiment, the case where the metal wire 21 is wound around the columnar metal terminal 10 with a predetermined pitch interval is illustrated. In the second modification, a case where the metal wire 20b is wound around the columnar metal terminal 10 without a pitch interval will be described.
　図８は、変形例２に係る端子１Ｂを示す断面図である。図８に示すように、端子１Ｂに備わる金属ワイヤ２０ｂは、柱状金属端子１０ｂに対してピッチ間隔をあけないように巻き付けられている。このような巻き付け状態であるために、金属微粒子群４０が吹き付けられたとしても、金属線２１ｂにおける巻き付け部においては、金属微粒子群４０が柱状金属端子１０ｂに到達しない空間が生じる。このため、当該空間は、埋設部３０ｂの形成後に空隙５９となる。具体的には、空隙５９は、絶縁層２９ｂと、柱状金属端子１０ｂとの間に設けられている。 FIG. 8 is a cross-sectional view showing a terminal 1B according to Modification 2. As shown in FIG. 8, the metal wire 20b provided in the terminal 1B is wound around the columnar metal terminal 10b so as not to have a pitch interval. Due to this winding state, even if the metal fine particle group 40 is blown, a space where the metal fine particle group 40 does not reach the columnar metal terminal 10b is generated in the winding portion of the metal wire 21b. Therefore, the space becomes the void 59 after the embedded portion 30b is formed. Specifically, the void 59 is provided between the insulating layer 29b and the columnar metal terminal 10b.
　このように、埋設部３０ｂには、絶縁層２９ｂと柱状金属端子１０ｂとの間に空隙５９が設けられているので、端子１Ｂにおけるクッション性を高めることができる。これにより、衝撃を吸収することができ、金属線２１ｂの断線を抑制することが可能である。 In this way, since the voids 59 are provided in the buried portion 30b between the insulating layer 29b and the columnar metal terminals 10b, the cushioning property of the terminal 1B can be enhanced. As a result, it is possible to absorb the shock and suppress the disconnection of the metal wire 21b.
　［変形例３］
　上記実施の形態では、金属端子として柱状金属端子１０を例示して説明した。しかしながら、金属端子の形状は柱状でなくてもよい。変形例３では、金属端子として板状金属端子１０ｃを有する端子１Ｃについて説明する。 [Modification 3]
In the above-described embodiment, the columnar metal terminal 10 is exemplified as the metal terminal and described. However, the shape of the metal terminal may not be columnar. In Modification 3, a terminal 1C having a plate-shaped metal terminal 10c as a metal terminal will be described.
　図９は、変形例３に係る端子１Ｃを示す断面図である。図９に示すように、端子１Ｃの板状金属端子１０ｃは、板状の金属端子である。板状金属端子１０ｃは、例えば、銅（Ｃｕ）を主成分とする金属からなる部材である。なお、板状金属端子１０ｃは、その他の金属から形成されていてもよいし、その表面にメッキ層を有していてもよい。金属ワイヤ２０ｃは、板状金属端子１０ｃの一方の主面に対して埋設部３０ｃを介して電気的に接合されている。 FIG. 9 is a cross-sectional view showing a terminal 1C according to Modification 3. As shown in FIG. 9, the plate-shaped metal terminal 10c of the terminal 1C is a plate-shaped metal terminal. The plate-shaped metal terminal 10c is, for example, a member made of a metal whose main component is copper (Cu). The plate-shaped metal terminal 10c may be made of other metal, or may have a plating layer on its surface. The metal wire 20c is electrically joined to one main surface of the plate-shaped metal terminal 10c via the embedded portion 30c.
　具体的には、全長にわたって絶縁被膜２２ｃが被覆された金属線２１ｃを有する金属ワイヤ２０ｃの一端部を、板状金属端子１０ｃの一方の主面上に配置する。その後、その一端部に向けて、コールドスプレー法により金属微粒子群４０を吹き付ける。この吹付けによって、金属微粒子群４０が堆積することで、板状金属端子１０ｃ上で金属線２１ｃの一端部を覆うように埋設部３０ｃが形成される。また、吹付け時には、金属ワイヤ２０ｃの絶縁被膜２２ｃの一部が削られ除去される。一方、金属ワイヤ２０ｃの一端部では、絶縁被膜２２ｃにおける板状金属端子１０ｃ側の部分が絶縁層２９ｃとして残存する。絶縁層２９ｃが残存したとしても、金属線２１ｃは、埋設部３０ｃを介して板状金属端子１０ｃと電気的に接続されることとなる。なお、金属端子のその他の形状としては、例えばブロック状などが挙げられる。 Specifically, one end of the metal wire 20c having the metal wire 21c covered with the insulating coating 22c over the entire length is arranged on one main surface of the plate-shaped metal terminal 10c. After that, the metal fine particle group 40 is sprayed toward the one end by the cold spray method. By this spraying, the metal fine particle group 40 is deposited, so that the embedded portion 30c is formed on the plate-shaped metal terminal 10c so as to cover one end of the metal wire 21c. Moreover, at the time of spraying, a part of the insulating coating 22c of the metal wire 20c is shaved and removed. On the other hand, at one end of the metal wire 20c, the portion of the insulating coating 22c on the plate-shaped metal terminal 10c side remains as the insulating layer 29c. Even if the insulating layer 29c remains, the metal wire 21c is electrically connected to the plate-shaped metal terminal 10c via the embedded portion 30c. Other shapes of the metal terminal include, for example, a block shape.
　［その他］
　以上、本発明について、実施の形態に基づいて説明したが、本発明は、上記実施の形態に限定されるものではない。 [Other]
Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments.
　例えば、柱状金属端子に対して金属線が絡げられていない状態、つまり、金属線が交差部を有さず、単に１重で柱状金属端子に巻き付けられた状態で、柱状金属端子と金属線とが接合されてもよい。 For example, in a state in which the metal wire is not entangled with the columnar metal terminal, that is, in a state where the metal wire has no intersection and is simply wound around the columnar metal terminal, And may be joined.
　その他、実施の形態に対して当業者が思いつく各種変形を施して得られる形態や、本発明の趣旨を逸脱しない範囲で実施の形態における構成要素及び機能を任意に組み合わせることで実現される形態も本発明に含まれる。 In addition, a mode obtained by making various modifications to those skilled in the art by a person skilled in the art, and a mode realized by arbitrarily combining the constituent elements and functions in the embodiments without departing from the spirit of the present invention Included in the present invention.
１、１Ａ、１Ｂ、１Ｃ　端子
１０、１０ａ、１０ｂ　柱状金属端子（金属端子）
１０ｃ　板状金属端子（金属端子）
２１、２１ａ１、２１ａ２、２１ｂ、２１ｃ　金属線
２２、２２ｃ　絶縁被膜
２３、２３ａ１、２３ａ２　交差部
２９、２９ａ１、２９ａ２、２９ｂ、２９ｃ　絶縁層
３０、３０ａ、３０ｂ、３０ｃ　埋設部
４０　金属微粒子群
５９　空隙 1, 1A, 1B, 1C Terminals 10, 10a, 10b Columnar metal terminals (metal terminals)
10c Plate-shaped metal terminal (metal terminal)
21, 21a1, 21a2, 21b, 21c Metal wire 22, 22c Insulating coating 23, 23a1, 23a2 Intersection 29, 29a1, 29a2, 29b, 29c Insulating layer 30, 30a, 30b, 30c Embedded part 40 Metal fine particle group 59 Void

Claims (8)

  1. 　金属端子と、
    　絶縁被膜を有する金属線と、
    　前記金属端子に対して前記金属線を電気的に接合するため、前記金属端子上で前記金属線を埋設した金属微粒子群からなる埋設部と、
    　前記埋設部に配置された前記金属線における前記金属端子側の表面のみを覆う絶縁層と、を備える
    　端子。     Metal terminals,
    A metal wire having an insulating coating,
    In order to electrically bond the metal wire to the metal terminal, an embedded portion made of a group of metal fine particles in which the metal wire is embedded on the metal terminal,
    An insulating layer that covers only a surface of the metal wire disposed in the embedded portion on the metal terminal side.
  2. 　前記金属微粒子群は、硬さの異なる複数の金属微粒子を有する
    　請求項１に記載の端子。     The terminal according to claim 1, wherein the metal fine particle group includes a plurality of metal fine particles having different hardness.
  3. 　前記金属端子は、柱状であり、
    　前記金属線は、前記金属端子に結ばれた少なくとも一つの交差部を有し、前記金属端子に対して巻かれており、
    　前記交差部は、前記埋設部に埋設されている
    　請求項１または２に記載の端子。     The metal terminal is columnar,
    The metal wire has at least one intersection connected to the metal terminal and is wound around the metal terminal,
    The terminal according to claim 1, wherein the intersecting portion is embedded in the embedded portion.
  4. 　前記金属線は、複数本設けられており、それぞれが前記金属端子に対して巻き付けられている
    　請求項３に記載の端子。     The terminal according to claim 3, wherein a plurality of the metal wires are provided, and each of the metal wires is wound around the metal terminal.
  5. 　複数本の前記金属線は、線径が異なっている
    　請求項４に記載の端子。     The terminal according to claim 4, wherein the plurality of metal wires have different wire diameters.
  6. 　前記金属線は、アルミニウムを主成分とした金属で形成されている
    　請求項１～５のいずれか一項に記載の端子。     The terminal according to any one of claims 1 to 5, wherein the metal wire is formed of a metal containing aluminum as a main component.
  7. 　前記埋設部には、前記絶縁層と前記金属端子との間に空隙が設けられている
    　請求項１～６のいずれか一項に記載の端子。     The terminal according to any one of claims 1 to 6, wherein a space is provided in the embedded portion between the insulating layer and the metal terminal.
  8. 　金属端子と金属線とが電気的に接続された端子の接合方法であって、
    　全周に絶縁被膜を有する前記金属線を前記金属端子上に配置した後に、
    　前記金属線に対して金属微粒子群を吹き付けて前記金属線における前記金属端子とは反対側の前記絶縁被膜を除去するとともに、前記金属線における前記金属端子側の前記絶縁被膜を絶縁層として残存させながら、前記金属微粒子群からなる埋設部で前記金属線を埋設することで、前記金属線と前記金属端子とを電気的に接合する
    　端子の接合方法。     A method for joining terminals in which a metal terminal and a metal wire are electrically connected,
    After arranging the metal wire having an insulating coating on the entire circumference on the metal terminal,
    While spraying a group of fine metal particles on the metal wire to remove the insulating coating on the side opposite to the metal terminal in the metal wire, the insulating coating on the metal terminal side in the metal wire remains as an insulating layer. Meanwhile, a terminal joining method for electrically joining the metal wire and the metal terminal by embedding the metal wire in an embedding portion composed of the metal fine particle group.
PCT/JP2019/045438 2019-01-23 2019-11-20 Terminal and joining method for terminal WO2020152962A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160304A (en) * 1987-12-17 1989-06-23 Hitachi Cable Ltd Terminal stripper for insulated wire
JPH05144658A (en) * 1991-11-19 1993-06-11 Miyoshi Nakagawa Electronic component having lead terminal and its manufacture
JP2000012362A (en) * 1998-06-18 2000-01-14 Murata Mfg Co Ltd Beads inductor and its manufacture
JP2013030338A (en) * 2011-07-28 2013-02-07 Auto Network Gijutsu Kenkyusho:Kk Wire with terminal and manufacturing method therefor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01160304A (en) * 1987-12-17 1989-06-23 Hitachi Cable Ltd Terminal stripper for insulated wire
JPH05144658A (en) * 1991-11-19 1993-06-11 Miyoshi Nakagawa Electronic component having lead terminal and its manufacture
JP2000012362A (en) * 1998-06-18 2000-01-14 Murata Mfg Co Ltd Beads inductor and its manufacture
JP2013030338A (en) * 2011-07-28 2013-02-07 Auto Network Gijutsu Kenkyusho:Kk Wire with terminal and manufacturing method therefor

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