JP5995799B2 - Connection structure, connector, and connection method - Google Patents

Description

The present invention, for example, connecting structures such as attached to the connector or the like of automotive wire harnesses, connectors, and to a connection method.

An electrical equipment equipped in an automobile or the like constitutes an electrical circuit by being connected to another electrical equipment or a power supply device via a wire harness in which covered electric wires are bundled. At this time, the wire harness and the electrical equipment and the power supply device are connected to each other by connectors attached thereto.
These connectors have a configuration in which a crimp terminal connected by crimping to a covered electric wire is mounted inside, and a female connector and a male connector that are connected corresponding to the unevenness are fitted.

  By the way, since such a connector is used in various environments, unintended moisture may adhere to the surface of the covered electric wire due to dew condensation due to a change in ambient temperature. And when moisture penetrates into the connector through the surface of the covered electric wire, there is a problem that the surface of the electric wire conductor exposed from the tip of the covered electric wire is corroded.

Accordingly, various techniques for preventing moisture from entering the wire conductor crimped by the crimp terminal have been proposed.
For example, the water stop structure of an electric wire described in Patent Document 1 is a crimp terminal including a core wire barrel for crimping a core wire of an electric wire and an insulation coating barrel for crimping an insulating coating layer of the electric wire. It is said that the penetration of moisture from the insulating coating layer is prevented by covering the core wire barrel and the insulating coating barrel with the heat-shrinkable tube together with the insulating coating layer.

However, the water stop structure of the electric wire described in Patent Document 1 requires a process of attaching the heat-shrinkable tube and a process of overheating the heat-shrinkable tube, and in addition, it takes time to reliably shrink the heat-shrinkable tube. In addition, there is a problem that a great amount of man-hours are required to stop the water for the core wire barrel to which the core wire of the electric wire is crimped.
Furthermore, since the heat-shrinkable tube is exposed to the outside air, it is difficult to suppress aging deterioration and deterioration, and the heat-shrinkable tube may be deformed or damaged, and moisture may enter.

JP 2011-81918 A

This invention has been made in view of the above problems, and an object thereof is to provide connection structure that can be reliably prevented penetration of moisture from the coated side, connectors, and the connection method.

The present invention includes a coated crimping portion that crimps and crimps a wire conductor in which an outer periphery of an electric wire conductor is coated with an insulating coating to the vicinity of the tip of the coating, and a length of the coated wire from the tip of the coating together with the barrel portion which is integrally formed with the conductor crimping portion for crimping crimped to a predetermined said wire conductor exposed length direction is provided, the barrel of the crimp terminal which is constituted by a metal strip of copper-based material A connecting structure in which the covered electric wire and the crimp terminal are connected by a portion, and the coated crimp portion has ends of metal strips of a rolled copper-based material butted in the longitudinal direction. The conductor crimping portion is formed by welding and forming a cross-sectional shape in the short direction of the covered electric wire in a closed cross-sectional shape surrounding the covering, and extending a predetermined length in the longitudinal direction. Is Together are formed by extending the serial coating crimping portion in the longitudinal direction, are welded to the longitudinal direction together with the ends of the metal strip of rounded copper-based material is matched, the cross-sectional shape in the lateral direction Is formed in a closed cross-sectional shape surrounding the electric wire conductor, and the longitudinal end of the conductor crimping portion extending in the longitudinal direction in the barrel portion is closed so as to overlap in a planar shape, A sealing portion welded and sealed in the short direction is provided, and applied on the outer peripheral surface in the vicinity of the tip of the covering body in an application range substantially the same as the length in the longitudinal direction of the covering crimping portion. It is constituted by a sealing member having a waterproof, Oite the boundary between the inner surface and the outer surface of the covering body of the insulation crimp portion is formed along the direction crossing the longitudinal direction, longitudinal direction Wherein the insulation crimp portion formed without a gap along the inner surface of, wherein said the water stop means for preventing water from entering the longitudinal direction provided in view.

The barrel portion may be a closed barrel type having an internal hollow shape.
The closed cross-sectional shape may be a closed cross-sectional shape formed by welding the end portions, or a closed cross-sectional shape formed integrally by welding the overlapped end portions.
The compression in the short side direction may be compression of the covering body in the vertical and horizontal directions or compression of the covering body toward the radial center of the covering body.

According to the present invention, the crimp terminal can reliably prevent the intrusion of moisture from the cover body side, and can constitute a connection structure that can ensure reliable water-stopping only by crimping with the barrel portion of the crimp terminal. . Therefore, stable conductivity can be ensured.
Specifically, the barrel portion is provided with the covering crimping portion from the end on the covering body side by including a covering crimping portion having a cross-sectional shape in the short side direction, a conductor crimping portion, and a water stopping means. It is possible to prevent moisture from entering the inside. Furthermore, for example, by sealing or sealing the end portion on the electric wire conductor side in the barrel portion, it is possible to reliably prevent moisture from entering the inside from both longitudinal ends of the barrel portion.

In addition, since the water stop means is provided at the boundary between the cover and the cover crimping portion, the crimp terminal suppresses the deterioration of the water stop means due to exposure to the outside air and the water stop means due to external factors. Damage can be prevented. For this reason, the crimp terminal can reliably and continuously prevent the intrusion of moisture into the inside of the coated crimp portion in the crimped state.
Therefore, the crimp terminal can reliably prevent moisture from entering the inside of the coated crimp portion in the crimped state.

Further, the water stop means is formed along the direction intersecting the longitudinal direction in the covering crimping portion, and is formed without gaps along the inner surface of the covering crimping portion when viewed in the longitudinal direction. The crimp terminal can more reliably stop water that has entered from the gap between the cover and the cover crimping portion.
Specifically, by compressing the covering body in the short direction by the compression portion, the gap between the covering body and the covering crimping portion can be reliably closed by the repulsive force of the covering body. For this reason, when crimping | bonding a covering crimping | compression-bonding part with respect to a covering, the gap which arises with a deformation | transformation of a covering crimping part can be obstruct | occluded reliably.

Furthermore, by forming the compression part in the coated crimping part, it is possible to suppress damage and alteration due to external factors, and to more continuously prevent moisture from entering the coated crimped part.
In addition, when the compression portion is formed without a gap when viewed in the longitudinal direction, it is possible to more reliably prevent moisture from entering the inside of the coated crimp portion in the crimped state.
Therefore, the crimping terminal can improve the water stoppage by the compression part that reliably closes the gap between the covering body and the covering crimping part.

In addition, the crimp terminal is provided with a sealing portion in which the conductor crimping portion extends in the longitudinal direction and the distal ends in the longitudinal direction are overlapped and sealed in the barrel portion. Intrusion of moisture from the opening on the conductor side can be prevented. Furthermore, the crimp part can make the inside of the barrel part in a crimped state hermetically sealed by the sealing part and the water stop means described above. Thereby, the crimp terminal can prevent the penetration | invasion of the water | moisture content to the inside of a barrel part more reliably.
Therefore, the crimp terminal can secure a reliable water stop and ensure a more stable conductivity by sealing the inside of the barrel portion in the crimped state.

Furthermore, the waterproofing unit is Oite on an outer peripheral surface in the vicinity of the distal end of the covering body, which is applied in longitudinal length substantially the same application range of the insulation crimp portion is constituted by a sealing member having a waterproof Thus, when the covering crimping portion is crimped, the sealing member is in close contact with the covering crimping portion and the covering body, so that the gap between the covering body and the covering crimping portion can be closed in the crimping state. Thereby, the crimp terminal can easily stop water entering the inside of the coated crimp portion along the surface of the coated body.

Furthermore, by using together with the compression part mentioned later, the crimp terminal can ensure more reliable water stop in the crimping | compression-bonding state.
Therefore, the crimp terminal can easily seal the gap between the cover and the cover crimping portion by using the seal member as the water stop means, and can ensure more reliable water stop.

As an aspect of the present invention, the water stopping means can be configured in a groove shape formed on the inner surface of the covering crimping portion.
According to the present invention, the boundary between the covering body and the covering crimping portion is crimped so as to be substantially uneven due to the groove shape, and the intrusion path of moisture entering from the rear to the front of the covering crimping portion is complicated, and The distance can be increased to make moisture intrusion more difficult, and more reliable water stopping can be ensured.

  Further, as an aspect of the present invention, the closed cross-sectional shape is rounded to a size surrounding the outer periphery of the covered electric wire, and the abutted ends are welded along the longitudinal direction in a rear view substantially O-type. be able to.

In one embodiment of the present invention, the electric wire conductor can and benzalkonium be composed of an aluminum-based material.
According to the present invention, it is possible to reduce the weight as compared with a covered electric wire having an electric wire conductor made of copper wire, and to prevent so-called dissimilar metal corrosion (hereinafter referred to as “electrolytic corrosion”) due to the above-described reliable water stoppage.

  Specifically, if the copper-based material conventionally used for the wire conductor of the covered electric wire is replaced with an aluminum-based material such as aluminum or aluminum alloy, and the wire conductor made of the aluminum-based material is crimped to the crimp terminal, the terminal material Phenomenon in which aluminum base material, which is a base metal, is corroded by contact with noble metals such as tin plating, gold plating, copper alloy, etc., that is, electrolytic corrosion becomes a problem.

The electrolytic corrosion is a phenomenon in which, when moisture adheres to a site where a noble metal and a base metal are in contact, a corrosion current is generated, and the base metal is corroded, dissolved, or lost. Due to this phenomenon, the conductor portion made of an aluminum-based material that is crimped to the crimping portion of the crimping terminal is corroded, dissolved, or lost, and eventually the electrical resistance increases. As a result, there is a problem that a sufficient conductive function cannot be achieved.
However, so-called galvanic corrosion can be prevented by reducing the weight as compared with the covered electric wire having a conductor portion made of a copper-based material due to the above-described reliable water-stopping property.

Moreover, this invention is a wire harness configured by bundling a plurality of the connection structures described above.
By this invention, the wire harness which ensured the stable electroconductivity can be comprised irrespective of the metal seed | species which comprises a crimp terminal and an electric wire conductor.

In addition, the present invention is a connector in which the crimp terminal in the connection structure described above is disposed in a connector housing.
According to the present invention, it is possible to connect the crimp terminal while ensuring stable conductivity regardless of the metal type constituting the crimp terminal and the wire conductor.

More specifically, for example, when a female connector and a male connector are fitted to each other and the crimp terminals arranged in the connector housing of each connector are connected to each other, the crimp terminal of each connector is secured while maintaining water-tightness. Can be connected to each other.
Therefore, the connector can ensure a connection state with reliable conductivity.

The present invention also provides a coated crimping portion that crimps and crimps the vicinity of the tip of the coated body in the coated wire in which the outer periphery of the wire conductor is coated with an insulating coated body, and the coated wire from the distal end of the coated body A barrel portion constituted by a conductor crimping portion that crimps and crimps the wire conductor exposed for a predetermined length in the longitudinal direction of the barrel by a barrel portion in a crimping terminal constituted by a metal strip of a copper-based material , It is a connection method for connecting the covered electric wire and the crimp terminal, the end portions of the metal strip of the rolled copper-based material are butted together and welded in the longitudinal direction, and in the short direction of the covered electric wire The cross-sectional shape is formed into a closed cross-sectional shape surrounding the covering body, and the covering crimping portion formed by extending a predetermined length in the longitudinal direction and the covering crimping portion are extended in the longitudinal direction. And forming Moni, with matching the ends of the metal strip rounded copper-based material is welded to the longitudinal direction, the cross-sectional shape in the widthwise direction is formed in closed cross section surrounding said wire conductor wherein The end of the longitudinal direction of the conductor crimping part extending in the longitudinal direction in the barrel part constituted by the conductor crimping part is closed so as to overlap in a planar shape, and is welded and sealed in the lateral direction e Bei was sealing portion, the said covered wire having a sealing member is applied with a waterproof outer circumferential surface in the vicinity of the distal end of the covering body in the longitudinal direction of the length and substantially the same application range of the coating crimping portion barrels And is formed at the boundary between the inner surface of the covering crimping portion and the outer surface of the covering body along the direction intersecting the longitudinal direction, and the covered portion in the longitudinal direction. The water shut-off means without inter clearance along the inner surface of the crimp portion and forming with the sealing member.

  According to the present invention, the water stop means can be more reliably formed. Thereby, the crimping | compression-bonding method of a crimp terminal can block | close the clearance gap between a coating body and a coating crimping part more reliably while suppressing that a water stop means is formed in a distorted shape.

  As an aspect of the present invention, the barrel portion of the copper alloy strip punched into a terminal shape is rounded to a size surrounding the outer periphery of the covered electric wire, and the rounded ends are butted together and welded along the longitudinal direction. It can be formed in a substantially O-shape in rear view.

This invention can provide connectivity structure that can reliably prevent the ingress of moisture from the coated side, connectors, and the connection method.

The external appearance perspective view which shows the external appearance from the upper direction in a covered electric wire and a crimp terminal. Explanatory drawing explaining the welding in a barrel part. Explanatory drawing explaining the crimping process in the AA arrow cross section in FIG. Sectional drawing which shows the cross-sectional shape of the crimping connection structure in the AA arrow cross section in FIG. The perspective view which shows the connection corresponding state of a female connector and a male connector. Explanatory drawing explaining another crimp terminal and a crimp connection structure. Explanatory drawing explaining another crimp terminal and a crimp connection structure. Explanatory drawing explaining another welding method in a barrel part.

An embodiment of the present invention will be described below with reference to the drawings.
First, the covered electric wire 200 and the crimp terminal 100 in the present embodiment will be described in detail with reference to FIGS. 1 and 2.
1 shows an external perspective view of the covered electric wire 200 and the crimp terminal 100 from above, and FIG. 2 shows an explanatory view for explaining the welding in the barrel portion 130.

In FIG. 1, an arrow X indicates the longitudinal direction (hereinafter referred to as “longitudinal direction X”), and an arrow Y indicates the width direction (hereinafter referred to as “width direction Y”). Furthermore, in the longitudinal direction X, a box part 110 side (left side in the figure) described later is defined as the front, and a covered electric wire 200 side (right side in the figure) described later with respect to the box part 110 is defined as the rear.
2A shows a schematic perspective view of the bottom surface side of the crimp terminal 100 in which the box portion 110 is in a transmissive state indicated by a two-dot chain line, and FIG. 2B is an enlarged Z portion in FIG. 2A. The figure is shown.

The covered electric wire 200 is configured by covering an aluminum core wire 201 in which aluminum strands 201a are bundled with an insulating coating 202 made of an insulating resin. Specifically, the aluminum core wire 201 is formed by twisting an aluminum alloy wire so that the cross section becomes 0.75 mm ² . Furthermore, the covered electric wire 200 exposes the aluminum core wire 201 having a predetermined length from the tip of the insulating coating 202. A sealing material 210 is applied to the outer periphery of the insulating coating 202.

  The sealing material 210 is made of a waterproof resin material, and is formed by applying a substantially uniform thickness on the outer peripheral surface of the insulating coating 202 near the front end. The application range of the sealing material 210 in the longitudinal direction X is preferably substantially the same as the length in the longitudinal direction X of the coated crimping part 131.

  The crimp terminal 100 is a female terminal and has a box portion 110 that allows insertion of a male tab of a male terminal (not shown) from the front to the rear in the longitudinal direction X, and a predetermined length at the rear of the box portion 110. The barrel portion 130 disposed via the transition portion 120 is integrally formed.

  This crimp terminal 100 is formed by punching a copper alloy strip (not shown) such as brass whose surface is tin-plated (Sn-plated) into a planarly expanded terminal shape, and then rearwardly viewing the box portion 110 of the hollow rectangular column body. This is a closed barrel type terminal which is formed by bending a three-dimensional terminal shape including a substantially O-shaped barrel portion 130 and welding the barrel portion 130.

  The box portion 110 is formed by bending one of the side surface portions 112 continuously provided on both side portions in the width direction Y orthogonal to the longitudinal direction X of the bottom surface portion 111 so as to overlap the other end portion. It is composed of a hollow quadrangular prism body that is in a substantially rectangular inverted shape as viewed from above.

  Further, an insertion tab of a male terminal (illustrated) is formed inside the box portion 110 by extending the front side in the longitudinal direction X of the bottom surface portion 111 and bending it toward the rear in the longitudinal direction X. The elastic contact piece 113 (refer FIG. 3) which contacts (omission) is provided.

  The barrel portion 130 integrally includes a cover crimping portion 131 for crimping the insulating coating 202 and a core wire crimping portion 132 for crimping the exposed aluminum core wire 201, and the front end portion of the core wire crimping portion 132 is substantially flat. The sealing portion 133 is deformed so as to be crushed.

  As shown in FIG. 2, the barrel portion 130 is formed by rounding the barrel portion 130 in a copper alloy strip punched into a terminal shape to a size that surrounds the outer periphery of the covered electric wire 200, and butting the rounded end portions 130 a to each other. It welds along the welding part W1 of the direction X, and is formed in the back view substantially O type. In other words, the barrel part 130 forms the cross-sectional shape in the width direction Y into a closed cross-sectional shape.

Furthermore, as shown in FIG. 2, the sealing part 133 of the barrel part 130 is welded and sealed along the welding point W2 in the width direction Y so as to close the front end in the longitudinal direction X of the barrel part 130. Yes.
That is, the barrel part 130 is formed in a substantially cylindrical shape having a front end in the longitudinal direction X and an end part 130 a which are welded and closed, and an opening is provided in the rear in the longitudinal direction X.

  Next, with respect to the crimp connection structure 1 configured by inserting the covered electric wire 200 coated with the sealing material 210 into the barrel portion 130 of the crimp terminal 100 having such a configuration and crimping the barrel portion 130 by crimping, This will be described in detail with reference to FIGS.

3 shows an explanatory view for explaining the caulking step in the cross section taken along the line AA in FIG. 1, and FIG. 4 shows the cross-sectional shape of the crimped connection structure 1 in the cross section taken along the line AA in FIG. A cross-sectional view is shown.
3A is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3B illustrates a process of crimping the crimp terminal 100 into which the covered electric wire 200 is inserted with the crimp tool 10. An explanatory diagram is shown.

As shown in FIG. 3A, the aluminum core wire 201 is exposed from the rear and the covered electric wire 200 coated with the sealing material 210 is inserted into the barrel portion 130 of the crimp terminal 100 described above. At this time, the exposed aluminum core wire 201 is inserted so as to be disposed in the core wire crimping portion 132 as shown in FIG.
Thereafter, as shown in FIG. 3B, the barrel portion 130 of the crimp terminal 100 into which the covered electric wire 200 has been inserted is crimped by being sandwiched by a pair of crimp tools 10 constituted by an anvil and a crimper.

  As shown in FIG. 3B, the one set of crimping tools 10 includes a first crimping die 11 that becomes an anvil and a second crimping die 12 that becomes a crimper. Furthermore, the inner surface shape of the crimping tool 10 is formed in a shape corresponding to the outer surface shape of the coated crimping part 131 and the core wire crimping part 132 after crimping.

  With such a crimping tool 10, the core wire crimping part 132 and the coated crimping part 131 are crimped so that the barrel part 130 of the crimping terminal 100 into which the covered electric wire 200 is inserted is sandwiched between a pair of crimping tools 10, and an aluminum core wire The crimp connection structure 1 is configured by crimping 201 and the insulating coating 202.

  Specifically, as shown in FIG. 4, the crimping connection structure 1 is crimped between the core wire crimping portion 132 and the aluminum core wire 201 by caulking the core wire crimping portion 132 with the crimping tool 10 so as to be conductive. Has been. Further, by crimping the covering crimping portion 131 with the crimping tool 10, the covering crimping portion 131 and the insulating coating 202 are crimped and connected.

  In this way, the crimp connection structure 1 is constructed in which the barrel of the crimp terminal 100 is crimped and the covered electric wire 200 is crimped and connected, and the electrical conductivity between the aluminum core wire 201 and the crimp terminal 100 is ensured.

Next, a connector in which the above-described crimped connection structure 1 is mounted in the connector housing will be described with reference to FIG.
FIG. 5 is a perspective view of the connection state of the female connector 21 and the male connector 31. In FIG. 5, the male connector 31 is indicated by a two-dot chain line.

  The female connector housing 22 has a plurality of openings inside which the crimp terminals 100 can be mounted along the longitudinal direction X, and is formed in a box shape having a substantially rectangular cross-sectional shape in the width direction Y. A wire harness 20 provided with a female connector 21 by mounting a plurality of crimp connection structures 1 constituted by the above-described crimp terminals 100 along the longitudinal direction X to the inside of such a female connector housing 22. Configure.

  Similarly to the female connector housing 22, the male connector housing 32 corresponding to the female connector housing 22 has a plurality of openings into which crimp terminals can be attached, and has a substantially cross-sectional shape in the width direction Y. It is rectangular and is formed so as to be connectable to the female connector housing 22 in correspondence with the unevenness.

A wire harness provided with a male connector 31 by mounting the crimp connection structure 1 constituted by a male crimp terminal (not shown) along the longitudinal direction X to the inside of such a male connector housing 32. 30 is configured.
Then, the wire harness 20 and the wire harness 30 are connected by fitting the female connector 21 and the male connector 31 together.

The crimping method of the crimp terminal 100, the crimp connection structure 1, the female connector 21, and the crimp terminal 100 that realizes the above configuration can reliably prevent moisture from entering from the insulating coating 202 side.
Specifically, when the covering crimping portion 131 is crimped, the sealing material 210 is in close contact with the covering crimping portion 131 and the insulating coating 202, so that the gap between the insulating coating 202 and the covering crimping portion 131 is closed in the crimped state. Can do. Thereby, the crimp terminal 100 can easily stop water entering the inside of the coating crimping part 131 through the surface of the insulating coating 202.

  Therefore, the crimp terminal 100 and the crimp connection structure 1 can easily seal the gap between the insulating coating 202 and the coated crimping portion 131 by applying the sealing material 210 to the insulating coating 202 to provide more reliable water-stopping. Can be secured.

  In the above description, the sealing material 210 is applied to the outer peripheral surface of the insulating coating 202. However, the present invention is not limited to this, and the gap between the coated crimping portion 131 and the insulating coating 202 in the crimped state can be closed with the sealing material 210. Any suitable configuration may be used.

  For example, in FIG. 6 which shows explanatory drawing explaining another crimp terminal 100 and the crimp connection structure 1, the sealing material 140 is apply | coated to the internal peripheral surface of the coating crimp part 131, as shown to Fig.6 (a). It may be configured.

  At this time, as shown in FIG. 6B, the crimping connection structure 1 has a sealing material 140 having a diameter of the coated electric wire 200 at the boundary between the insulating coating 202 compressed by the coated crimping part 131 and the coated crimping part 131. Compressed in the direction.

  Further, the sealing materials 210 and 140 are configured to be applied to the insulating coating 202 or the coated crimping portion 131. However, the present invention is not limited to this, and the waterproof sheet-like sealing member is cut into an appropriate size. Alternatively, it may be attached to the outer peripheral surface of the insulating coating 202 or the inner peripheral surface of the coating crimping portion 131 using an adhesive.

Further, although the sealing materials 210 and 140 are waterproof resin materials, they are not limited to this and may be waterproof rubber materials or the like.
Moreover, it is good also as a structure which uses together the water stop protrusion 134 in Example 1 or Example 2 mentioned above, and the sealing materials 210 and 140 together. Thereby, the crimp terminal 100 and the crimp connection structure 1 can further improve the water-stopping property.

In the above description, the crimp terminal 100 is the female crimp terminal 100. However, the present invention is not limited to this, and is a male crimp terminal that fits in the longitudinal direction X with respect to the female crimp terminal 100. May be.
Moreover, although the core wire in the covered electric wire 200 is made of an aluminum alloy and the crimp terminal 100 is made of a copper alloy such as brass, the core wire in the covered electric wire 200 and the crimp terminal 100 are made of a copper alloy such as brass or an aluminum alloy. You may comprise with the same metal.

In addition, by forming the female connector 21 by disposing the crimp terminal 100 in the crimp connection structure 1 inside the female connector housing 22, the male connector is connected to the crimp terminal 100 disposed in the female connector housing 22. When connecting the 31 crimping terminals, the crimping terminal 100 of the female connector 21 can be connected to the male connector 31 while ensuring water-stopping.
Therefore, the female connector 21 can ensure a connection state with reliable conductivity.

  In addition, the core wire of the covered electric wire 200 is made of an aluminum alloy, and the barrel portion 130 is made of a copper alloy, so that the weight can be reduced compared to the covered electric wire 200 having a core wire made of copper wire. Furthermore, the reliable water stoppage by the sealing part 133 and the water stop protrusion 134 can prevent the occurrence of electrolytic corrosion by the crimp terminal 100 and the covered electric wire 200 made of different metals.

  Furthermore, as another example of the crimp terminal 100, as shown in FIG. 7A, the cross-sectional shape in the longitudinal direction X is recessed from the inner surface of the coated crimp portion 331 toward the radially outer side of the coated electric wire 200. A plurality of serration portions 338 that are concave and formed continuously without being interrupted along the circumferential direction may be formed on the inner surface of the coating crimping portion 331 with a predetermined interval in the longitudinal direction X. At this time, as shown in FIG. 7B, the crimped connection structure 1 has a substantially uneven shape due to the serration portion 338 at the boundary between the insulating coating 202 and the coated crimping portion 331 in the cross-sectional shape in the longitudinal direction X. Crimped.

  As a result, the intrusion path of moisture that has entered from the back to the front of the coated crimping portion 331 can be complicated, and the distance of the intrusion path can be increased to make the intrusion of moisture more difficult. Can be secured.

  Moreover, when the copper alloy strip was punched into a terminal shape developed in a plane, the water stop protrusion 334 was formed by press molding. However, the present invention is not limited thereto, and the barrel portion 330 in the copper alloy strip punched into the terminal shape is rounded. The water stop protrusion 334 may be formed when bending into a three-dimensional terminal shape.

In correspondence between the configuration of the present invention and the above-described embodiment,
The electric wire conductor of this invention corresponds to the aluminum core wire 201 of the embodiment,
Similarly,
The covering corresponds to the insulating coating 202,
The conductor crimping part corresponds to the core wire crimping part 131,
The short direction corresponds to the width direction Y,
The water stop means corresponds to the water stop protrusions 134 and 334, the serration portion 338, and the sealing materials 140 and 210,
The compression part corresponds to the water stop protrusions 134 and 334,
The sealing member corresponds to the sealing materials 140 and 210,
Aluminum material corresponds to aluminum alloy,
Copper material corresponds to copper alloy strips such as brass,
The connection structure corresponds to the crimp connection structure 1,
The connector housing corresponds to the female connector housing 22 and the male connector housing 32,
The connector corresponds to the female connector 21 and the male connector 31,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

  In the present embodiment, the example in which the barrel portion 130 of the crimp terminal 100 is crimped and connected to the aluminum core wire 201 made of a base metal such as aluminum or aluminum alloy has been described, but other than the base metal, for example, copper or copper It may be crimped and connected to a conductor portion made of a noble metal such as an alloy, and can exhibit substantially the same functions and effects as those of the above embodiment.

  Specifically, since the barrel portion 130 having the above-described configuration can prevent water from entering in a crimped state, for example, copper or a copper alloy that has been required to have a seal after crimping so far, for example, for water-stop between lines. You may connect the covered electric wire comprised with a core wire.

  Further, in the above description, as shown in FIG. 2, the copper alloy strip punched into the terminal shape is rounded, the end portions 130a are butted together and welded along the welding point W1 in the longitudinal direction X, and the rear view is substantially O. After forming the mold, the front end portion in the longitudinal direction X is crushed and welded and sealed along the welding point W2 in the width direction Y, and the front end in the longitudinal direction X is sealed with the sealing portion 133, Although a substantially cylindrical barrel portion 130 having an opening at the rear in the longitudinal direction X is formed, the shape of the barrel portion 130 is formed as shown in FIG. 8, which is an explanatory view for explaining another welding method in the barrel portion 130. After that, the barrel portion 130 may be formed by welding the welding points.

  More specifically, as shown in FIG. 8A, the copper alloy strip punched into a terminal shape is rounded, and the front end portion in the longitudinal direction X is crushed so as to be formed in the shape of the barrel portion 130 including the sealing portion 133 in advance. To do.

  Then, the end portions 130a that are rounded and faced are welded along the welded portion W3 in the longitudinal direction X, and the sealed portion 133 is welded and sealed along the welded portion W4 in the width direction Y to be sealed. To complete.

  Further, as shown in FIG. 2, the end portions 130a may be butted against each other on the bottom surface side of the barrel portion 130, and as shown in FIGS. 8A and 8B, the upper surface side of the barrel portion 130 may be used. The end portions 130a may be butted together and welded.

  Furthermore, as shown in FIG. 8C, in the crimped state, the coated crimped portion 131 of the barrel portion 130 is crimped to the insulating coating 202 of the coated electric wire 200 in a circular shape when viewed from the front, and the core wire crimped portion 132 is The aluminum core wire may be crimped in a substantially U shape when viewed from the front.

  Further, as shown in FIG. 8, the crimp terminal 100 is welded to the barrel portion 130 while being attached to the belt-like carrier K, and then crimped and connected to the covered electric wire 200 or crimped. After being connected, it may be separated from the carrier K, but the crimp terminal 100 may be formed in a state separated from the carrier K, and the covered electric wire 200 may be crimped.

DESCRIPTION OF SYMBOLS 1 ... Crimp connection structure 21 ... Female connector 22 ... Female connector housing 31 ... Male connector 32 ... Male connector housing 100, 300 ... Crimp terminal 130, 330 ... Barrel part 131, 331 ... Covering crimp part 132, 332 ... core wire crimping part 133, 333 ... sealing part 134, 334 ... water stop protrusion 140, 210 ... sealing material 200 ... covered electric wire 201 ... aluminum core wire 202 ... insulation coating 338 ... serration part X ... longitudinal direction Y ... width direction

Claims (8)

A coated crimping portion for crimping by crimping the outer periphery of the wire conductor with the insulating coated body in the vicinity of the tip of the coated body; and a predetermined length from the distal end of the coated body in the longitudinal direction of the coated wire conductor crimping portion for crimping crimped and with a barrel portion which is integrally formed is provided with respect to the wire conductor exposed length, the barrel portion of the crimp terminal which is constituted by a metal strip of copper-based material, wherein A connection structure in which a covered electric wire and the crimp terminal are connected ,
The coated crimping part is
The ends of the metal strips of the rolled copper-based material are butted together and welded in the longitudinal direction, and the cross-sectional shape in the short direction of the covered electric wire is formed into a closed cross-sectional shape surrounding the covering body. , the longitudinal direction is formed by extending a predetermined length,
The conductor crimping part is
The covering crimping portion is formed by extending in the longitudinal direction, and ends of metal strips of a rolled copper-based material are butted together and welded in the longitudinal direction, and a cross-sectional shape in the lateral direction There are formed in the closed cross section surrounding said wire conductor,
A sealing portion that is closed so as to be overlapped in a planar manner in the longitudinal direction of the conductor crimping portion that extends in the longitudinal direction in the barrel portion, and is sealed by being welded in the lateral direction. Provided,
The outer peripheral surface in the vicinity of the front end of the covering body is constituted by a sealing member having a waterproof property, which is applied in an application range substantially the same as the length in the longitudinal direction of the covering crimping portion, and the inner surface of the covering crimping portion and the coating Oite the boundary between the outer surface of the body, is formed along the direction crossing the longitudinal direction, along the inner surface of the insulation crimp portion in the longitudinal direction as viewed is no gap formed, the moisture into the longitudinal Provided with water stop means to prevent intrusion
Connection structure. Connection structure according to the insulation crimp portion waterstop means <br/> claim 1 provided that is configured by forming the groove shape on the inner surface of. The closed cross-sectional shape is
3. The connection structure according to claim 1, wherein the ends that are rounded to a size surrounding the outer periphery of the covered electric wire and are butted together are welded along the longitudinal direction and are substantially O-shaped in a rear view . The wire conductor is made of an aluminum material .
The connection structure according to any one of claims 1 to 3 . A wire harness formed by bundling a plurality of connection structures according to any one of claims 1 to 4 . The connector by which the crimp terminal in the connection structure as described in any one of Claims 1 thru | or 4 is arrange | positioned in the connector housing. A coated crimping portion for crimping by crimping the outer periphery of the wire conductor with the insulating coated body in the vicinity of the tip of the coated body; and a predetermined length from the distal end of the coated body in the longitudinal direction of the coated wire It comprises a barrel portion constituted by a conductor crimping portion that crimps and crimps the wire conductor exposed for length, and the crimped wire and the crimped wire by a barrel portion in a crimp terminal constituted by a metal strip of a copper-based material. A connection method for connecting to a terminal ,
While the ends of the metal strips of the rolled copper-based material are butted together and welded in the longitudinal direction, the cross-sectional shape in the short direction of the covered electric wire is formed into a closed cross-sectional shape surrounding the covering body The coated crimp portion formed by extending a predetermined length in the longitudinal direction, and the end portion of the metal strip of the rolled copper-based material while forming the coated crimp portion extending in the longitudinal direction In the longitudinal direction of the barrel portion constituted by the conductor crimping portion formed in a closed cross-sectional shape in which the cross-sectional shape in the short-side direction surrounds the electric wire conductor while being abutted to each other and welded in the longitudinal direction with the longitudinal direction of the distal end of the conductor crimping portion extending closes so as to overlap in a planar, Bei example a seal which is sealing by welding the in the transverse direction,
Crimping is inserted Oite on an outer peripheral surface in the vicinity of the distal end of the covering member, the covered electric wire and the sealing member is coated with a waterproof longitudinal length substantially the same application range of the insulation crimp portion to said barrel portion And
Wherein the boundary of the inner surface of the insulation crimp portion and an outer surface of the covering member is formed along the direction crossing the longitudinal direction, no inter-gap along the inner surface of the insulation crimp portion in the longitudinal direction as viewed stop The water means is formed by the seal member
Connection method . The barrel portion of the copper alloy strip punched into a terminal shape is rounded to a size that surrounds the outer periphery of the covered electric wire, and the rounded end portions are butted together and welded along the longitudinal direction so as to have a substantially O shape in a rear view. The connection method according to claim 7 formed.

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