JP6000202B2 - Crimping terminal, connection structure, connector, and crimping method for crimping terminal - Google Patents

Description

  The present invention relates to a crimping terminal, a connection structure, a connector, and a crimping method for a crimping terminal that are mounted on, for example, a connector of an automobile wire harness.

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

  In view of the above problems, an object of the present invention is to provide a crimp terminal, a connection structure, a connector, and a crimp method for a crimp terminal that can reliably prevent moisture from entering from the side of the covering body.

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 A crimping terminal including a barrel portion integrally formed with a conductor crimping portion that crimps and crimps the wire conductor exposed for a predetermined length in a direction, the sheath crimping portion being a short of the sheathed wire The cross-sectional shape in the hand direction is formed into a closed cross-sectional shape that surrounds the covering body, and is formed by extending a predetermined length in the longitudinal direction, and the conductor crimping portion is formed in the longitudinal direction. The cross-sectional shape in the short direction is formed into a closed cross-sectional shape surrounding the electric wire conductor, and the covering body is compressed in the short direction in the pressure-bonded state on the covering pressure-bonding portion. So that the coating An inner surface of the coated crimping portion is formed in a protruding shape that protrudes from the inner surface of the coated portion toward the center in the short direction of the coated electric wire before crimping, and in a longitudinal direction along the direction intersecting the longitudinal direction. A compression portion formed without a gap along the outer surface of the covering crimping portion, a recess corresponding to the compression portion is provided on an outer surface of the covering crimping portion, and a band-shaped carrier is attached to an end portion of the covering crimping portion. And

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.
The protruding shape can be a shape in which the cross-sectional shape in the longitudinal direction is substantially convex, substantially mountain-shaped, or a shape in which the diameter of the coated crimping portion is reduced.

According to the present invention, the crimp terminal can reliably prevent the intrusion of moisture from the cover side.
Specifically, the barrel part is provided from the end on the covering body side to the inside of the covering crimping part by including a covering crimping part having a cross-sectional shape in the short side direction, a conductor crimping part, and a compression part. It is possible to prevent moisture from entering the water. 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 compression part is provided at the boundary between the coated body and the coated crimp part, the crimp terminal suppresses the deterioration of the compressed part due to exposure to the outside air and prevents damage to the compressed part due to external factors. can do. 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, in the crimped state, the coated body is crimped to a protruding shape that protrudes from the inner surface of the coated crimped portion toward the center in the short direction of the coated electric wire so that the coated body is compressed in the short direction in the crimped state. The crimp terminal is formed before and has a compression portion formed without gaps along the inner surface of the coated crimp portion in the longitudinal direction along the direction intersecting the longitudinal direction. Water that has entered from the gap with the crimping part can be more reliably stopped.

  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, by forming the compression portion in a protruding shape that protrudes from the inner surface of the coated crimp portion toward the center in the short direction of the coated electric wire, the crimp terminal further improves the water stoppage by the compression portion. Can do.
Specifically, the covering can be more reliably compressed by making the compression portion have a protruding shape. Furthermore, since the covering is deformed into a substantially uneven shape by the projecting compression portion, the intrusion route of moisture can be complicated and the distance of the intrusion route can be increased. Thereby, it can be made more difficult for the water | moisture content which penetrate | invaded the clearance gap between a coating | covering body and a coating | coated crimping | compression-bonding part to reach | attain an electric wire conductor.

In addition, since the protruding compressed portion bites into the cover body by crimping, even if a pulling force is applied in the longitudinal direction, the covered wire can be prevented from easily coming off from the crimp terminal.
Therefore, the crimp terminal can ensure more reliable water-stopping by making the compression portion have a protruding shape.

As an aspect of the present invention, the barrel portion can be provided with a sealing portion that extends the conductor crimping portion in the longitudinal direction and seals the tip in the longitudinal direction.
According to the present invention, the crimp terminal can prevent moisture from entering from the opening on the wire conductor side in the barrel portion. Furthermore, the crimp part can make the inside of the barrel part in a crimping state sealed by the sealing part and the above-described compression part. 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.

Moreover, this invention is the connection structure which connected the said covered electric wire and the said crimp terminal with the barrel part in the crimp terminal mentioned above.
According to the present invention, it is possible to configure a connection structure that can ensure reliable water-stopping only by crimping with a barrel portion of a crimp terminal. Therefore, stable conductivity can be ensured.

As an aspect of the present invention, the wire conductor can be made of an aluminum-based material, and at least the barrel portion can be made of a copper-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 crimping method of a crimp terminal comprising a barrel crimping portion that is crimped by crimping the wire conductor exposed for a predetermined length in the longitudinal direction of the wire conductor, the barrel portion being the covered wire The cross-sectional shape in the short direction is formed into a closed cross-sectional shape surrounding the covering body, and the covering pressure-bonding portion formed by extending a predetermined length in the longitudinal direction, and the covering pressure-bonding portion The cross-sectional shape in the short-side direction is formed by the conductor crimping portion formed in a closed cross-sectional shape surrounding the electric wire conductor, and the end of the covering crimping portion is a band-shaped carrier Attach to Is and, with formed before bonding the inner surface of the insulation crimp portion protrusion shape protruding toward the center in the lateral direction of the covered electric wire along a direction intersecting the longitudinal direction, in the longitudinal direction viewed Rutotomoni comprising a compression portion without a gap formed along an inner surface of the insulation crimp portion, the outer surface, the insulation crimp portion provided with a recess corresponding to the compression section, of the inner surface and the covering body of the insulation crimp portion At the boundary with the outer surface, crimping is performed by crimping the vicinity of the tip of the covering body so that the covering portion is compressed in the short direction by the compression portion.
By this invention, a compression part can be formed more reliably and the clearance gap between a coating body and a covering crimping | compression-bonding part can be obstruct | occluded more reliably.

  According to the present invention, it is possible to provide a crimping terminal, a connection structure, a connector, and a crimping method of the crimping terminal that can surely prevent moisture from entering from the covering body side.

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 crimp terminal and a crimp connection structure. Explanatory drawing explaining the shape of a different water stop protrusion. Explanatory drawing explaining another welding method in a barrel part.

An embodiment of the present invention will be described 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.

  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. 3A, the cover crimping part 131 of the barrel part 130 is formed with a water stop protrusion 134 in advance with respect to the cover crimping part 131 in the first embodiment described above.
The water stop protrusion 134 has a cross-sectional shape in the longitudinal direction X formed in a substantially convex shape that protrudes inward from the inner surface of the coated crimping portion 131, and a circumference that intersects the longitudinal direction X on the inner surface of the coated crimped portion 131. It is formed continuously without interruption along the direction.
The water stop protrusion 134 is formed by press molding when a copper alloy strip such as brass whose surface is tin-plated (Sn plated) is punched into a terminal shape developed in a plane.

  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, the covered electric wire 200 is inserted into the barrel portion 130 of the crimp terminal 100 in which the water stop protrusion 134 is previously formed on the inner peripheral surface of the coated crimp portion 131 as described above, and the barrel portion 130 is crimped to be crimped. The process and the crimped connection structure 1 after crimping 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 covered electric wire 200 with the aluminum core wire 201 exposed is inserted into the barrel portion 130 of the crimp terminal 100 described above from the rear. 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.

  As shown in FIG. 3B, the crimped connection structure 1 further compresses the insulating coating 202 crimped by the coated crimping portion 131 so that the water stop projection 134 is directed toward the radial center of the coated electric wire 200. ing.

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, by providing the sealing portion 133 at the front end of the barrel portion 130, the crimp terminal 100 can prevent moisture from entering from the front end of the barrel portion 130. Furthermore, by forming the water stop protrusion 134 on the inner peripheral surface of the cover crimping portion 131, it is possible to prevent moisture from entering the inside of the barrel portion 130 from the rear side end portion of the barrel portion 130.

  That is, with the sealing part 133 and the water stop protrusion 134, the crimp terminal 100 can make the inside of the barrel part 130 in a crimped state sealed. Thereby, the crimp terminal 100 can prevent the penetration | invasion of the water | moisture content to the inside of the barrel part 130 more reliably.

  More specifically, by further compressing the insulating coating 202 in the crimped state with the water stop protrusion 134, the gap between the insulating coating 202 and the coated crimping portion 131 can be reliably closed by the repulsive force of the insulating coating 202. For this reason, when the covering crimping part 131 is crimped with respect to the insulation coating 202, the gap which arises with a deformation | transformation of the covering crimping part 131 can be obstruct | occluded reliably.

Furthermore, by forming the water stop protrusion 134 in the coated crimping portion 131, damage and alteration due to external factors can be suppressed, and water intrusion into the coated crimped portion 131 can be prevented more continuously. be able to.
In addition, by forming the water stop protrusion 134 without any gap along the circumferential direction in the rear view, it is possible to more reliably prevent moisture from entering the inside of the cover crimping part 131 in the crimped state.

  Moreover, the insulating coating 202 can be more reliably compressed by making the water stop protrusion 134 into a protruding shape. Furthermore, since the insulation coating 202 is deformed into a substantially uneven shape by the protruding water stop protrusion 134, the water intrusion path can be complicated and the distance of the intrusion path can be increased. Thereby, it is possible to make it more difficult for moisture that has entered the gap between the insulating coating 202 and the coating crimping portion 131 to reach the aluminum strand 201a.

In addition, since the protruding water stop protrusion 134 bites into the insulating coating 202 by crimping, even if a pulling force is applied in the longitudinal direction X, the covered electric wire 200 can be prevented from being easily detached from the crimp terminal 100. .
Therefore, since the crimp terminal 100 has the sealing portion 133 and the water stop protrusion 134 formed therein, it is possible to ensure a more reliable water stop in the crimped state, and to prevent moisture from entering the barrel portion 130. It can prevent more reliably.

In addition, the crimp connection structure 1 that can ensure reliable water stop by simply crimping the covered electric wire 200 to the barrel portion 130 of the crimp terminal 100 by the crimp terminal 100 having the water stop protrusion 134 described above can be configured. it can.
Therefore, the crimp connection structure 1 can ensure more stable conductivity.

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.

  In the above description, the water stopping protrusion 134 is formed in advance on the inner peripheral surface of the covering crimping portion 131. However, the present invention is not limited to this, and any shape can be used as long as the insulating covering 202 is compressed. May be.

  For example, in FIG. 6 to FIG. 9 showing explanatory views for explaining another crimp terminal 100 and the crimp connection structure 1, as shown in FIG. 6A, the cross-sectional shape in the longitudinal direction X is the covering crimp part 131. Mountain-shaped projections 135 that are substantially chevron-shaped protruding from the inner surface toward the center in the radial direction of the covered electric wire 200 and formed continuously without being interrupted along the circumferential direction are spaced apart in the longitudinal direction X by a predetermined interval. A plurality of coating crimping portions 131 may be formed on the inner surface. At this time, as shown in FIG. 6 (b), the crimping connection structure 1 can ensure more reliable water-stopping by further compressing the insulating coating 202 in the crimped state with the mountain-shaped protrusion 135. .

  As another example of the crimp terminal 100, as shown in FIG. 7A, a cross-sectional hat shape in which the cross-sectional shape in the longitudinal direction X protrudes from the inner surface of the coated crimp portion 131 toward the radial center of the coated electric wire 200. Thus, the trapezoidal protrusion 136 formed continuously without being interrupted along the circumferential direction may be formed on the inner surface of the cover crimping portion 131. At this time, as shown in FIG. 7 (b), the crimped connection structure 1 can ensure more reliable water-stopping by further compressing the insulating coating 202 in the crimped state with the trapezoidal protrusion 136.

  Furthermore, as another example of the crimp terminal 100, as shown in FIG. 8A, the cross-sectional shape in the longitudinal direction X is raised from the inner surface of the coated crimp portion 131 toward the radial center of the coated electric wire 200. A plurality of standing protrusions 137 formed continuously without being interrupted along the circumferential direction may be formed on the inner surface of the coated crimping part 131 at a predetermined interval in the longitudinal direction X. At this time, as shown in FIG. 8 (b), the crimped connection structure 1 can ensure more reliable water-stopping by further compressing the insulating coating 202 in the crimped state with the standing protrusions 137.

  In the above description, the water stop protrusion 134 is formed so as to be continuous without being interrupted along the circumferential direction. However, the present invention is not limited to this, and the outer peripheral surface of the insulating coating 202 can be compressed without gaps in the rear view. Any suitable shape may be used.

  For example, when forming the water stop protrusion by caulking the cover press bonding part 131 with the pressure bonding tool 10, as shown in FIG. You may comprise the water stop protrusion 138 by arrange | positioning the some division | segmentation water stop protrusion 139 arrange | positioned at intervals so that a clearance gap may not arise in the circumferential direction in back view.

  9A shows a cross-sectional view in the longitudinal direction X of the crimped connection structure 1, FIG. 9B shows a cross-sectional view taken along the line BB in FIG. 9A, and FIG. ) Shows a cross-sectional view taken along the line CC in FIG. Moreover, in FIG. 9, illustration of the covered electric wire 200 is abbreviate | omitted.

Specifically, as shown in FIG. 9A, the water stop protrusion 138 in FIG. 9 has a pair of divided water stop protrusions 139 that face each other in the radial direction of the covered electric wire 200 in the longitudinal direction X. Three are arranged at intervals.
As shown in FIGS. 9A to 9C, the pair of split water blocking protrusions 139 has an inner peripheral surface of the covering crimping portion 131 so as to face in the radial direction in a partial range in the circumferential direction. It is formed protruding from. In other words, the pair of split water blocking protrusions 139 is formed in a shape having a gap without being continuous in the circumferential direction in the rear view.

  And with respect to the divided water blocking protrusion 139a located at the rearmost in the longitudinal direction X, the divided water blocking protrusion 139b located in the center is arranged in the circumferential direction as shown in FIGS. 9B and 9C. It is rotated 90 degrees. Furthermore, in the longitudinal direction X, the split water stop 139c located at the foremost position is formed at the same position in the circumferential direction as the split water stop protrusion 139a located at the back. That is, in the rear view, the water stop protrusion 138 is formed so that the three divided water stop protrusions 139 are arranged so as to close the gaps in the respective circumferential directions.

  For this reason, the crimp terminal 100 and the crimp connection structure 1 always stop the water that has entered the barrel part 130 from the rear end of the covering crimp part 131 by any one of the three split water stop protrusions 139. be able to.

In the above description, the crimp terminal 100 is a female crimp terminal. 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. Also good.
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 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 compression parts correspond to the water stop protrusions 134 and 138, the trapezoidal protrusion 136, the mountain-shaped protrusion 135, and the standing protrusion 137,
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.

  For example, in the above description, as shown in FIG. 2, the copper alloy strip punched into the terminal shape is rounded, the end portions 130 a are butted together and welded along the welding point W <b> 1 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 the 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. 10 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. 10A, 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. 10 (a) and 10 (b), 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. 10C, 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.

  In addition, as shown in FIG. 10, 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 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.

  Furthermore, in the cover crimping part 131 of the barrel part 130, a pressure-proof sealing material is interposed between the inner surface of the cover crimping part 131 and the insulating coating 202 of the covered electric wire 200, and the rear part of the barrel part 130 is pressed. The water-stopping property may be improved.

DESCRIPTION OF SYMBOLS 1 ... Crimp connection structure 21 ... Female connector 22 ... Female connector housing 31 ... Male connector 32 ... Male connector housing 100 ... Crimp terminal 130 ... Barrel part 131 ... Cover crimp part 132 ... Core wire crimp part 133 ... Sealing Portions 134, 138 ... Water stop projection 135 ... Mountain-shaped projection 136 ... Trapezoidal projection 137 ... Standing projection 200 ... Covered wire 201 ... Aluminum core wire 202 ... Insulation coating X ... Longitudinal direction Y ... Width direction

Claims (7)

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 a barrel which is formed integrally with the conductor crimping portion for crimping crimped to the wire conductor exposed length provided crimping terminal,
The coated crimping part is
Wherein is a cross-sectional shape in the lateral direction of the covered wires are formed in closed cross section that surrounds the covering member Rutotomoni is formed by extending a predetermined length in the longitudinal direction,
The conductor crimping part is
The insulation crimp portion is formed to extend in the longitudinal direction Rutotomoni, wherein the cross-sectional shape in the lateral direction are formed in closed cross section surrounding said wire conductor,
In the coated crimping part,
The covering body in the crimped state to compress the lateral direction, the coating is from the inner surface of the crimping portion is formed before bonding the protrusion shape protruding toward the center in the lateral direction of the covered wires Rutotomoni, wherein along a direction intersecting the longitudinal direction, the compression unit that is no gap formed along an inner surface of the insulation crimp portion in the longitudinal direction as viewed is provided,
On the outer surface of the coated crimping part,
A recess corresponding to the compression part is provided;
A crimp terminal , wherein a band-shaped carrier is attached to an end of the coated crimp portion . In the barrel part,
The conductor crimping portion is extended in the longitudinal direction, the crimping terminal according to claim 1 in which the sealing portion sealing the front end is provided in the longitudinal direction. The connection structure in which the said covered electric wire and the said crimp terminal were connected by the barrel part in the crimp terminal of Claim 1 or 2. The wire conductor, Rutotomoni consists of an aluminum-based material,
The connection structure according to claim 3, wherein at least the barrel portion is made of a copper-based material. Claim 3 or wire harness connection structure is configured by bundling a plurality of claim 4. Connector crimp terminal is placed in the connector housing in the connection structure according to claim 3 or claim 4. 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 A crimping method of a crimping terminal comprising a barrel portion constituted by a conductor crimping portion that crimps and crimps the wire conductor exposed for length,
The barrel portion,
The covered crimp portion formed by extending a predetermined length in the longitudinal direction while forming a cross-sectional shape in the short direction of the covered electric wire into a closed sectional shape surrounding the covered body, and the covered crimp portion And extending in the longitudinal direction, and forming the cross-sectional shape in the short direction with the conductor crimping portion formed in a closed cross-sectional shape surrounding the wire conductor,
The end of the coated crimping part is attached to a band-shaped carrier,
Formed before crimping into a protruding shape protruding from the inner surface of the coated crimping portion toward the center in the short direction of the coated electric wire, and along the direction intersecting the longitudinal direction, the coated crimping portion in the longitudinal direction Rutotomoni comprising a compression unit which is no gap formed along an inner surface, an outer surface, said insulation crimp portion provided with a recess corresponding to the compression section, the boundary between the inner surface and the outer surface of the covering body of the insulation crimp portion The crimping method for crimping terminals according to claim 1, wherein the compressing portion compresses the covering body in the short-side direction and crimps the covering body in the vicinity of the front end thereof.

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