JP2023117675A - Connection structure between shield wire and shield member, and shield member - Google Patents

Abstract

To provide a structure capable of suppressing misalignment between a braid of a shield wire and a braid connection unit of a shield member even when tensile force is applied to the shield wire.SOLUTION: A first shield member 5 includes a braid connection unit 52 that crimps an exposed braid portion 24a of a shield electric wire 2. The braid connection unit 52 includes a base 54, a long crimping piece 55, and a short crimping piece 56. On the distal end side of the short crimping piece 56, a crank unit 57 including a first bent unit 56a bent in a direction away from the shield electric wire 2, and a second bent unit 56b bent in the opposite direction to the first bent unit 56a on the distal side of the first bent unit 56a is formed. In the state where the braid connection unit 52 has crimped the outer periphery of the exposed braid portion 24a, the tip 56p of the short crimping piece 56 on the distal side of the second bent unit 56b is located on the outside of the tip 55p of the long crimping piece 55 and presses the tip 55p of the long crimping piece 55 inward.SELECTED DRAWING: Figure 8

Description

TECHNICAL FIELD The present invention relates to a structure for connecting a shield wire and a shield member.

FIG. 12 is an exploded view of a conventional shielded wire with a shielded connector (see Patent Document 1).

A shielded wire 510 in FIG. 12 includes an inner wire, a braid 513 covering the inner wire, and a sheath 514 covering the braid 513 . The braid 513 is exposed from the sheath 514 of the shielded wire 510 and folded back from the edge of the sheath 514 .

The shield connector 501 of FIG. 12 includes an inner terminal connected to the end of the inner wire of the shield wire 510, an inner housing containing the inner terminal, a shield shell 518, and an outer housing 503 containing the shield shell 518. I have it.

The shield shell 518 is obtained by subjecting a metal plate to press working or the like. and a sheath crimping piece 518c.

A pair of braid crimping pieces 518b are wound around the outer periphery of the folded portion of the braid 513 and electrically connected to the braid 513 by crimping the folded portion. Further, the pair of braided caulking pieces 518b are in a cylindrical shape in which the tip surfaces of the braided caulking pieces 518b are in contact with each other in a state where the folded-back portion of the braid 513 is caulked.

JP 2021-96915 A

In the conventional technology described above, a tensile force (arrow F in FIG. 12) is sometimes applied to the shielded wire 510 so that the shielded connector 501 and the shielded wire 510 are separated from each other during transportation. In such a case, there is a problem that the braid crimping piece 518b and the braid 513 are relatively displaced and the electrical connection reliability is lowered.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a structure capable of suppressing displacement between the braid of the shield wire and the braid connection portion of the shield member even when a tensile force is applied to the shield wire.

The present invention comprises a shield wire and a shield member, wherein the shield member comprises a braid connection portion connected to an exposed braid portion exposed by cutting a portion of the sheath of the shield wire, and the braid connection The portion includes a base, a long crimping piece extending in a belt shape from one end of the base, and a short crimping piece shorter than the long crimping piece extending in a belt from the other end of the base, The braided connection portion is wound around the outer periphery of the shielded wire to crimp the exposed braided portion. and a second bent portion that is bent in a direction opposite to the first bent portion on the distal end side of the first bent portion, and the second A shielded wire and a shield, characterized in that a distal end portion closer to the distal end than the bent portion is positioned outside the distal end portion of the long crimping piece and presses the distal end portion of the long crimping piece inward. It is a connection structure of members.

According to the present invention, even when a tensile force is applied to the shielded wire, it is possible to suppress the displacement between the exposed portion of the braid of the shielded wire and the braided connection portion of the shield member, thereby reducing the reliability of the electrical connection between the braid and the shielded member. can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a shielded wire with a shield connector to which a connection structure for a shielded wire and a shield member according to a first embodiment of the present invention is applied; It is the figure which hides the outer housing of FIG. FIG. 3 is a diagram in which the second shield member of FIG. 2 is hidden and turned upside down; 4 is a cross-sectional view taken along line AA in FIG. 3; FIG. FIG. 4 is a perspective view showing a state before the exposed braid portion of the first shield member shown in FIG. 3 is crimped; FIG. 6 is a cross-sectional view taken along line BB in FIG. 5; FIG. 5 is an enlarged view of the vicinity of the braided joint in FIG. 4; FIG. 8 is a cross-sectional view taken along line CC in FIG. 7; FIG. 8 is a perspective view showing a state before caulking the exposed braid portion of the first shield member used in the connection structure of the shield wire and the shield member according to the second embodiment of the present invention; FIG. 10 is a cross-sectional view taken along line DD in FIG. 9; FIG. 11 is a cross-sectional view showing a state in which the braid connection portion of FIG. 10 crimps the braid exposed portion of the shielded wire; FIG. 3 is an exploded view of a conventional shielded wire with a shielded connector;

A "connection structure between a shield wire and a shield member" according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8. FIG.

FIG. 1 shows a shielded wire (assembly of the shielded connector 9 and the shielded wire 2) 10 with a shielded connector 9 to which the connection structure 1 of the shielded wire 2 and the first shield member (corresponding to the "shielding member)" 5 of this example is applied. is a perspective view of the.

As shown in FIG. 4, the shielded wire 2 includes two inner wires 20, a metal foil 23 covering the inner wires 20, a braid 24 covering the metal foil 23, and an insulating sheath covering the braid 24. 25 and . The internal electric wire 20 is a covered electric wire in which a core wire 21 is covered with a covering 22 . The braid 24 is formed by tubularly knitting a plurality of metal wires. The braid 24 is exposed at the end of the shielded wire 2 by partially cutting off the sheath 25 and the metal foil 23 , and the exposed braid portion 24 a is folded back from the edge of the sheath 25 to the outside.

The shield connector 9 includes an inner terminal 3 connected to the end of each internal electric wire 20, an inner housing 4, a first shield member 5, a second shield member 6, a sleeve 7, and an outer housing 8. ing.

The inner terminal 3 is obtained by subjecting a metal plate to press work or the like, and includes a core wire crimping piece 31 crimping the core wire 21 of the internal electric wire 20 and a coating crimping piece 32 crimping the coating 22 . , and a female-type connection portion 33 that is electrically connected by being fitted with a mating terminal.

The inner housing 4 is made of an insulating synthetic resin and has a terminal accommodating chamber 41 for accommodating each internal wire 20 .

The first shield member 5 is obtained by subjecting a metal plate to press working or the like. As shown in FIGS. 2 and 3, the first shield member 5 includes a main body portion 50 combined with a main body portion 60 of the second shield member 6 to cover the inner housing 4, and a braid connecting portion connected to the exposed braid portion 24a. 52 , and a connecting portion 53 connecting the body portion 50 and the braid connecting portion 52 .

The second shield member 6 is obtained by subjecting a metal plate to press working or the like. The second shield member 6 includes a body portion 60 that is combined with the body portion 50 of the first shield member 5 to cover the inner housing 4 , a cover portion 62 that covers the braid connection portion 52 , and connects the body portion 60 and the cover portion 62 . A connecting portion 63 is provided.

The main bodies 50 and 60 are divided into halves and combined to form a rectangular tube. Both the first shield member 5 and the second shield member 6 are shield members, but only the first shield member 5 corresponds to the "shield member" in the claims.

The sleeve 7 is made of metal and has a cylindrical shape. Sleeve 7 is positioned between sheath 25 and exposed braid portion 24a, as shown in FIGS.

The outer housing 8 is made of insulating synthetic resin. The outer housing 8 accommodates the inner terminal 3 assembled to the end of the shield wire 2 , the inner housing 4 , the first shield member 5 , the second shield member 6 and the sleeve 7 . The outer housing 8 is fitted with a mating connector (not shown). The outer housing 8 has a lock arm 91 that maintains the mated state with the mating connector.

The connection structure 1 between the shield wire 2 and the first shield member 5 is, in detail, a connection structure between the exposed braided portion 24 a and the braided connection portion 52 . A detailed configuration of the braided connection portion 52 will be described below.

As shown in FIGS. 5 to 8, the braided connection portion 52 includes a base portion 54 positioned on the extension of the connecting portion 53, a long crimping piece 55 extending in a belt shape from one end 54a of the base portion 54, and the base portion 54. and a short crimping piece 56 extending in a belt shape from the end 54b. The length from the other end 54b of the base portion 54 to the tip surface 56t of the short crimping piece 56 (the short crimping piece 56 has a crank portion 57 formed thereon, and the length is taken as the length when the crank portion 57 is stretched) is , the length from one end 54 a of the base portion 54 to the tip surface 55 t of the long crimping piece 55 .

The braid connecting portion 52 is wound around the outer circumference of the shielded wire 2, that is, the outer circumference of the exposed braid portion 24a, positions the exposed braid portion 24a between itself and the sleeve 7, and crimps the exposed braid portion 24a.

On the distal end side of the short crimping piece 56, there is a first bent portion 56a that is bent at a right angle in a direction away from the shield wire 2, and a first bent portion 56a on the distal end side of the first bent portion 56a in a direction opposite to the first bent portion 56a. A crank portion 57 having a second bent portion 56b bent at right angles is formed. The crank portion 57 is formed in advance in a state before crimping the exposed braid portion 24a.

When the braid exposed portion 24a is crimped, the braided connection portion 52 is cylindrical, and the distal end portion 56p of the short crimping piece 56 on the distal end side of the second bent portion 56b is the long crimping piece 55. , and presses the tip 55p of the long crimping piece 55 inward. Further, the tip surface 55 t of the long crimping piece 55 abuts on the first bent portion 56 a of the short crimping piece 56 .

In the shielded wire 10 with the shield connector 9, a pulling force (arrow F in FIG. 7) may be applied to the shielded wire 2 during transportation or the like so that the shielded connector 9 and the shielded wire 2 are separated from each other. In that case, the braid connection portion 52 and the exposed braid portion 24 a tend to be relatively displaced, and the uncompressed portion of the shielded wire 2 (the portion on the left side of the long crimping piece 55 in FIG. 7 ) is pushed inside the braid connection portion 52 trying to get into Then, the pressing force of the non-compressed portion is applied to the inner peripheral surface of the cylindrical braided connection portion 52, and the braided connection portion 52 is about to be pushed open. That is, it tries to expand the diameter (see the dashed arrows in FIGS. 7 and 8).

Regarding this, in the connection structure 1 between the shield wire 2 and the first shield member 5, the braid connection portion 52 is suppressed from being spread. Specifically, when the braided connection portion 52 is about to be expanded, a large frictional force acts between the contact surfaces of the short crimping piece 56 and the long crimping piece 55, which are difficult to deform, and the two are displaced in the circumferential direction. , the braid connection portion 52 is prevented from being pushed apart. As a result, the braided connection portion 52 and the exposed braid portion 24a are prevented from being relatively displaced, and a decrease in the reliability of the electrical connection between the braided connection portion 52 and the braid 24 can be prevented.

The reason why the short crimping pieces 56 are difficult to deform is that the length dimension of the short crimping pieces 56 is relatively short. The length dimension of the short crimping piece 56 should be at least shorter than that of the long crimping piece 55 . In addition, due to the fact that the crank portion 57 of the short crimping piece 56 presses the distal end portion 55p of the long crimping piece 55 (see the black arrow in FIG. 8), the short crimping piece A large frictional force acts between the contact surfaces of 56 and long crimping piece 55 .

A “connection structure between a shield wire and a shield member” according to a second embodiment of the present invention will be described with reference to FIGS. 9 to 11. FIG. In FIGS. 9 to 11, the same components as those of the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

The connection structure 101 between the shield wire 2 and the first shield member 105 of this example has a crimped shape due to the fact that the braided connection portion 152 of the first shield member 105 is formed with the bent portion 55a and the presence of the bent portion 55a. is the same as that of the first embodiment except that .

As shown in FIGS. 9 to 11, the bent portion 55a is formed at the tip portion 55t of the long crimping piece 55 and is bent away from the shield wire 2. As shown in FIGS. The bent portion 55a and the above-described crank portion 57 are formed in advance in a state before crimping the exposed braid portion 24a.

When the braid exposed portion 24a is crimped, the braid connection portion 152 has a cylindrical shape, and the distal end portion 56p of the short crimping piece 56 on the distal end side of the second bent portion 56b is aligned with the long crimping piece 55. , and presses the tip 55p of the long crimping piece 55 inward. Further, in the crimping process, the distal end portion 56p of the short crimping piece 56 closer to the distal end than the second bent portion 56b is bent toward the shield wire 2 to form the third bent portion 56c. That is, the distal end portion 56p of the short crimping piece 56 is bent along the bent portion 55a of the long crimping piece 55 to form the third bent portion 56c. Therefore, when the braid exposed portion 24a is crimped, the distal end portion 55p of the long crimping piece 55 and the distal end portion 56p of the short crimping piece 56 are engaged.

In the connection structure 101 of this example, the distal end portion 55p of the long crimping piece 55 and the distal end portion 56p of the short crimping piece 56 are engaged with each other. Spreading of the braided connection portion 152 can be further suppressed than in the first embodiment. Therefore, it is possible to more reliably suppress deterioration in the electrical connection reliability between the braided connection portion 152 and the braid 24 .

In addition, the above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to this embodiment. That is, various modifications can be made without departing from the gist of the present invention. As long as such modifications still have the configuration of the present invention, they are, of course, included in the scope of the present invention.

1,101 Connection structure of shielded wire and shield member 2 Shielded wire 5,105 First shield member (shield member)
24a braid exposed portion 25 sheath 54 base 52, 152 braid connection portion 55 long crimping piece 55a bending portion 55p tip portion 56 short crimping piece 56a first bent portion 56b second bent portion 56c third bent portion 56p tip portion 57 crank

Claims (5)

Equipped with a shielded wire and a shield member,
The shield member includes a braid connection portion connected to an exposed braid portion exposed by cutting a part of the sheath of the shield wire,
The braided connection portion includes a base, a long crimping piece extending in a belt shape from one end of the base, and a short crimping piece shorter than the long crimping piece extending in a belt from the other end of the base, with
The braided connection portion is wound around the outer periphery of the shielded wire to crimp the exposed braided portion,
On the distal end side of the short crimping piece, there is provided a first bent portion bent in a direction away from the shield wire, and a first bent portion bent in a direction opposite to the first bent portion on the distal end side of the first bent portion. A crank portion having a second bent portion is formed,
A distal end portion of the short crimping piece closer to the distal end than the second bent portion is located outside the distal end portion of the long crimping piece and presses the distal end portion of the long crimping piece inward. A connection structure for a shielded wire and a shield member, characterized by: 2. The connection structure between a shielded wire and a shield member according to claim 1, wherein the front end surface of the long crimping piece is in contact with the first bent portion of the short crimping piece. A bent portion bent in a direction away from the shield wire is formed at a tip portion of the long crimping piece,
A third bent portion bent in a direction approaching the shield wire is formed at a distal end portion of the short crimping piece closer to the distal end than the second bent portion,
2. The connection structure between a shielded wire and a shield member according to claim 1, wherein the tip of the long crimping piece and the tip of the short crimping piece are engaged with each other. A shield member used in the connection structure between the shield wire and the shield member according to any one of claims 1 to 3,
The shield member, wherein the braid connecting portion is formed with the crank portion in advance before the braid exposed portion is crimped. A shield member used in the connection structure of the shield wire and the shield member according to claim 3,
The shield member, wherein the braid connecting portion is formed with the crank portion and the bent portion in advance before the braid exposed portion is crimped.

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