Connection structure between shielded wire and shielding material, shielding material

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]

[0001] The present invention relates to a connection structure between a shielded electric wire and a shielding member. [Background technology]

[0002] FIG. 12 is an exploded view of a conventional shielded electric wire with a shielded connector (see Patent Document 1).

[0003] 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 is folded back from the edge of the sheath 514.

[0004] The shielded connector 501 in Figure 12 includes an inner terminal connected to the end of the inner wire of the shielded wire 510, an inner housing that accommodates the inner terminal, a shielded shell 518, and an outer housing 503 that accommodates the shielded shell 518.

[0005] The shield shell 518 is obtained by pressing a metal plate or the like, and includes a box-shaped shield portion 518a that houses an inner housing, a pair of braided crimping pieces 518b, and a pair of sheath crimping pieces 518c that crimp the sheath 514.

[0006] A pair of braid crimping pieces 518b are wound around the outer periphery of the folded-back portion of braid 513, and the folded-back portion is crimped to be electrically connected to braid 513. Furthermore, with the folded-back portion of braid 513 crimped, the tip surfaces of the pair of braid crimping pieces 518b abut against each other to form a cylindrical shape. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2021-96915 Summary of the Invention [Problem to be solved by the invention]

[0008] In the conventional technology described above, during transportation or the like, a pulling force (arrow F in FIG. 12 ) that causes shielded connector 501 and shielded wire 510 to move relatively apart may be applied to shielded wire 510. In such cases, there is a risk that braid crimping piece 518b and braid 513 may become misaligned relative to each other, resulting in a decrease in the reliability of the electrical connection.

[0009] Therefore, an object of the present invention is to provide a structure that can prevent misalignment between the braid of the shielded electric wire and the braid connection portion of the shielding member even when a tensile force is applied to the shielded electric wire. [Means for solving the problem]

[0010] The present invention provides a shielded electric wire and a shielding member, wherein the shielding member comprises a braided connecting portion connected to an exposed braid portion that is exposed by cutting away a portion of the sheath of the shielded electric wire, the braided connecting portion comprising a base portion, a long crimping piece extending in a strip shape from one end of the base portion, and a short crimping piece extending in a strip shape from the other end of the base portion and shorter than the long crimping piece, the braided connecting portion being wrapped around an outer periphery of the shielded electric wire to crimp the exposed braid portion, and a crank portion is formed on the tip side of the short crimping piece, the crank portion having a first bent portion bent in a direction away from the shielded electric wire, and a second bent portion bent in the opposite direction to the first bent portion on the tip side of the first bent portion, a third bent portion bent in a direction toward the shielded electric wire is formed at a tip portion of the short crimping piece that is closer to the tip end than the second bent portion, and a bent portion bent in a direction away from the shielded electric wire is formed at a tip portion of the long crimping piece, The tip end portion of the short crimping piece that is further tip-side than the second bent portion is positioned outside the tip end portion of the long crimping piece and presses the tip end portion of the long crimping piece inward. and the tip end of the long crimping piece and the tip end of the short crimping piece are engaged with each other. The present invention relates to a connection structure between a shielded electric wire and a shielding member. [Effects of the Invention]

[0011] According to the present invention, even when a tensile force is applied to the shielded wire, it is possible to suppress misalignment between the exposed braid portion of the shielded wire and the braid connection portion of the shielding member, thereby suppressing a decrease in the reliability of the electrical connection between the braid and the shielding member. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a shielded electric wire with a shield connector to which a connection structure between a shielded electric wire and a shielding member according to a first embodiment of the present invention is applied. [Figure 2] FIG. 2 is a diagram in which the outer housing of FIG. 1 is not shown. [Figure 3] 3 is a diagram in which the second shield member of FIG. 2 is not shown and the diagram is turned upside down. [Figure 4] FIG. 4 is a cross-sectional view taken along the line AA in FIG. [Figure 5] 4 is a perspective view showing a state before the exposed braided portion of the first shielding member alone in FIG. 3 is crimped. FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 7] FIG. 5 is an enlarged view of the vicinity of the braided connection portion in FIG. 4. [Figure 8] FIG. 8 is a cross-sectional view taken along line CC in FIG. [Figure 9] 10 is a perspective view showing a state before the exposed braided portion of a first shielding member used in a connection structure between a shielded electric wire and a shielding member according to a second embodiment of the present invention is crimped. FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line DD in FIG. [Figure 11] 11 is a cross-sectional view showing a state in which the braided connecting portion of FIG. 10 is crimped at an exposed braided portion of the shielded electric wire. FIG. [Figure 12] FIG. 10 is an exploded view of a conventional shielded electric wire with a shielded connector. DETAILED DESCRIPTION OF THE INVENTION

[0013] A "connection structure between a shielded electric wire and a shielding member" according to a first embodiment of the present invention will be described with reference to FIGS.

[0014] FIG. 1 is a perspective view of a shielded electric wire with a shielded connector 9 (an assembly of a shielded connector 9 and a shielded electric wire 2) 10 to which a connection structure 1 of a shielded electric wire 2 and a first shielding member (corresponding to a "shielding member") 5 of this example is applied.

[0015] 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 25 covering the braid 24. The inner wire 20 is a covered wire in which a core wire 21 is covered with a coating 22. The braid 24 is made by braiding a plurality of metal wires into a tubular shape. The braid 24 is exposed at the end of the shielded wire 2 by removing a portion of the sheath 25 and the metal foil 23, and this exposed braid portion 24a is folded back outward from the edge of the sheath 25.

[0016] The shielded connector 9 includes inner terminals 3 connected to the ends of the internal electric wires 20, an inner housing 4, a first shielding member 5, a second shielding member 6, a sleeve 7, and an outer housing 8.

[0017] The inner terminal 3 is obtained by applying press processing or the like to a metal plate, and includes a core crimping piece 31 that crimps the core wire 21 of the internal electric wire 20, a coating crimping piece 32 that crimps the coating 22, and a female connecting portion 33 that fits into a mating terminal to establish an electrical connection.

[0018] The inner housing 4 is made of insulating synthetic resin and has terminal accommodating chambers 41 for accommodating the respective internal electric wires 20 .

[0019] The first shielding member 5 is obtained by subjecting a metal plate to press processing, etc. As shown in Figures 2 and 3, the first shielding member 5 includes a main body 50 that is combined with the main body 60 of the second shielding member 6 to cover the inner housing 4, a braid connecting portion 52 that is connected to the exposed braid portion 24a, and a connecting portion 53 that connects the main body 50 and the braid connecting portion 52.

[0020] The second shielding member 6 is obtained by pressing a metal plate, etc. The second shielding member 6 includes a main body portion 60 that is combined with the main body portion 50 of the first shielding member 5 to cover the inner housing 4, a cover portion 62 that covers the braided connecting portion 52, and a connecting portion 63 that connects the main body portion 60 and the cover portion 62.

[0021] The main bodies 50 and 60 are split into halves that are combined to form a rectangular tube. Both the first shielding member 5 and the second shielding member 6 are shielding members, but only the first shielding member 5 corresponds to the "shielding member" in the claims.

[0022] The sleeve 7 is made of metal and formed into a cylindrical shape. As shown in FIGS. 4 and 7, the sleeve 7 is positioned between the sheath 25 and the exposed braid portion 24a.

[0023] The outer housing 8 is made of insulating synthetic resin. The outer housing 8 accommodates the inner terminal 3, inner housing 4, first shielding member 5, second shielding member 6, and sleeve 7, which are assembled to the end of the shielded electric wire 2. The outer housing 8 is mated with a mating connector (not shown). The outer housing 8 is equipped with a locking arm 91 that maintains the mated state with the mating connector.

[0024] More specifically, the connection structure 1 between the shielded wire 2 and the first shielding member 5 is a connection structure between the exposed braid portion 24a and the braid connecting portion 52. The detailed configuration of the braid connecting portion 52 will be described below.

[0025] 5 to 8, braided connecting portion 52 includes a base 54 located on an extension of coupling portion 53, a long crimping piece 55 extending in a strip shape from one end 54a of base 54, and a short crimping piece 56 extending in a strip shape from the other end 54b of base 54. The length from the other end 54b of base 54 to a tip surface 56t of short crimping piece 56 (a crank portion 57 is formed in short crimping piece 56, but this is the length when this is extended) is shorter than the length from one end 54a of base 54 to a tip surface 55t of long crimping piece 55.

[0026] The braid connection portion 52 is wound around the outer periphery of the shielded electric wire 2, that is, the outer periphery of the braid exposed portion 24a, and positions the braid exposed portion 24a between itself and the sleeve 7, thereby crimping the braid exposed portion 24a.

[0027] A crank portion 57 is formed on the tip side of the short crimping piece 56. The crank portion 57 has a first bent portion 56a bent at a right angle in a direction away from the shielded electric wire 2, and a second bent portion 56b bent at a right angle in the opposite direction to the first bent portion 56a on the tip side of the first bent portion 56a. The crank portion 57 is formed in advance before the exposed braid portion 24a is crimped.

[0028] When exposed braid portion 24a is crimped, braid connecting portion 52 is cylindrical, and tip portion 56p of short crimping piece 56, which is closer to the tip than second bent portion 56b, is positioned outside tip portion 55p of long crimping piece 55 and presses tip portion 55p of long crimping piece 55 inward. In addition, tip surface 55t of long crimping piece 55 abuts against first bent portion 56a of short crimping piece 56.

[0029] In the above-described shielded electric wire 10 with shielded connector 9, a tensile force (arrow F in FIG. 7 ) that moves the shielded connector 9 and the shielded electric wire 2 relatively apart may be applied to the shielded electric wire 2 during transportation, etc. In this case, the braided connection portion 52 and the exposed braid portion 24a tend to shift relative to each other, and the uncompressed portion of the shielded electric wire 2 (the portion to the left of the long crimping piece 55 in FIG. 7 ) tends to enter the inside of the braided connection portion 52. Then, a pressing force from the uncompressed portion is applied to the inner circumferential surface of the cylindrical braided connection portion 52, and the braided connection portion 52 tends to be pushed apart, that is, to expand in diameter (see the dashed arrows in FIGS. 7 and 8 ).

[0030] In this regard, in the connection structure 1 between the shielded electric wire 2 and the first shielding member 5, the braided connection portion 52 is prevented from being pushed open. Specifically, when the braided connection portion 52 is pushed open, a large frictional force acts between the contact surfaces of the short crimping piece 56, which is difficult to deform, and the long crimping piece 55, making it difficult for the two to shift relative to each other in the circumferential direction, thereby preventing the braided connection portion 52 from being pushed open. This prevents the braided connection portion 52 and the exposed braid portion 24a from being pushed open relative to each other, and prevents a decrease in the reliability of the electrical connection between the braided connection portion 52 and the braid 24.

[0031] The reason why short crimping piece 56 is less likely to deform is that the length of short crimping piece 56 is relatively short. The length of short crimping piece 56 only needs to be shorter than that of long crimping piece 55. Furthermore, because crank portion 57 of short crimping piece 56 presses down on tip end 55p of long crimping piece 55 (see the black arrow in Figure 8), a large frictional force acts between the contact surfaces of short crimping piece 56 and long crimping piece 55, as described above.

[0032] A connection structure between a shielded electric wire and a shielding member according to a second embodiment of the present invention will be described with reference to Figures 9 to 11. In Figures 9 to 11, the same components as those in the first embodiment are designated by the same reference numerals and description thereof will be omitted.

[0033] The connection structure 101 of the shielded wire 2 and the first shielding member 105 in this example is the same as that of the first embodiment, except that a bent portion 55a is formed in the braided connection portion 152 of the first shielding member 105, and the presence of the bent portion 55a results in a different crimping shape.

[0034] 9 to 11, the bent portion 55a is formed at the tip portion 55t of the long crimping piece 55, and is bent in a direction away from the shielded electric wire 2. The bent portion 55a and the above-mentioned crank portion 57 are formed in advance before the exposed braid portion 24a is crimped.

[0035] When the braid exposed portion 24a is crimped, the braid connecting portion 152 is cylindrical, and the tip 56p of the short crimping piece 56, which is closer to the tip than the second bent portion 56b, is positioned outside the tip 55p of the long crimping piece 55 and presses the tip 55p of the long crimping piece 55 inward. Furthermore, during the crimping process, the tip 56p of the short crimping piece 56, which is closer to the tip than the second bent portion 56b, is bent in a direction approaching the shielded electric wire 2 to form the third bent portion 56c. That is, the tip 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 tip 55p of the long crimping piece 55 and the tip 56p of the short crimping piece 56 are engaged with each other.

[0036] In connection structure 101 of the present example, tip end 55p of long crimping piece 55 and tip end 56p of short crimping piece 56 are engaged with each other, so that when a tensile force is applied to shielded electric wire 2, braided connection portion 152 can be prevented from being pushed apart more effectively than in the first embodiment. Therefore, deterioration in the reliability of the electrical connection between braided connection portion 152 and braid 24 can be more reliably prevented.

[0037] The above-described embodiment merely shows a typical form of the present invention, and the present invention is not limited to this embodiment. In other words, the present invention can be implemented with various modifications within the scope of the gist of the present invention. As long as such modifications still include the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0038] 1,101 Connection structure between shielded wire and shielding material 2 Shielded wire 5,105 First shield member (shield member) 24a Braid exposed part 25 Sheath 54 Base 52,152 Braided joint 55 Long crimping piece 55a Bend 55p tip 56 Short crimping piece 56a 1st bending part 56b 2nd bending part 56c 3rd bend 56p tip 57 Crank section

Claims

1. The shielded electric wire and the shielding member are provided. the shielding member includes a braid connecting portion connected to an exposed braid portion that is formed by removing a portion of the sheath of the shielded electric wire, the braided connecting portion includes a base portion, a long crimping piece extending in a strip shape from one end of the base portion, and a short crimping piece extending in a strip shape from the other end of the base portion and being shorter than the long crimping piece, the braided connecting portion is wound around an outer periphery of the shielded electric wire and crimps the exposed braided portion, a crank portion is formed on the tip side of the short crimping piece, the crank portion having a first bent portion bent in a direction away from the shielded electric wire and a second bent portion bent in an opposite direction to the first bent portion on the tip side of the first bent portion, a third bent portion bent in a direction approaching the shielded wire is formed at a tip portion of the short crimping piece that is closer to the tip side than the second bent portion, a bent portion bent in a direction away from the shielded electric wire is formed at a tip end portion of the long crimping piece, The tip end portion of the short crimping piece that is further tip-side than the second bent portion is positioned outside the tip end portion of the long crimping piece to press the tip end portion of the long crimping piece inward, and the tip end portion of the long crimping piece and the tip end portion of the short crimping piece are engaged with each other. A connection structure between a shielded electric wire and a shielding member.

2. A shielding member used in the connection structure of a shielded electric wire and a shielding member according to claim 1, The braid connecting portion has the crank portion and the bent portion formed in advance before the braid exposed portion is crimped. A shielding member characterized by:

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