JP3174236B2 - Braided connection structure of shielded connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a metal shell for shielding a conductor inside a connector from an external electric field and a shield braid.

[0002]

2. Description of the Related Art In a shielded connector, electromagnetic interference is prevented by covering the connector with a conductive cover (hereinafter, referred to as a "metal shell") and shielding an internal conductor from an external electric field. The metal shell is electrically connected to a shield braid (hereinafter, referred to as a “braid”) of the shield wire. FIG. 4 is a cross-sectional view illustrating a braided connection structure of a conventional shield connector. The shield connector includes a male connector and a female connector that can be fitted, and both have basically the same structure. For example, in the female connector 1 shown in the drawing, a cylindrical inner housing 7 having a terminal accommodating chamber 5 is integrally formed in a cylindrical outer housing 3. A shell insertion groove 11 for incorporating the metal shell 9 is provided between the outer housing 3 and the inner housing 7.
Is formed.

On the other hand, a rod-shaped male terminal 17 is crimped to the conductor 15a of the insulated core wire 15 of the shield wire 13, and the male terminal 17
Has a flange portion 21 that engages with the elastic locking piece 19 in the terminal accommodating chamber 5. The end of the insulating coating 23 of the shield wire 13 is cut off, and the exposed braid 25 is folded back toward the insulating coating 23. The connection portion 9a of the metal shell 9 is put on the folded braid 25, and the connection portion 9a is crimped to the braid 25 by caulking. Thereby, the braid 25 and the metal shell 9 are electrically connected.

The male terminal 17 crimped to the shield wire 13
Is inserted into the terminal accommodating chamber 5 so that the flange 21
Is engaged with the elastic locking piece 19, and the removal is restricted. At this time, the metal shell 9 is simultaneously incorporated into the shell insertion groove 11. A rubber plug 27 for waterproofing and dustproofing is attached to the shield wire 13 located at the rear part of the outer housing 3, and the rubber plug 27 is held by a rear holder 29.
Is held within.

[0005] The female connector 1 thus configured is fitted with a male connector (not shown) having substantially the same configuration, and the metal shells 9 exposed at the ends of both are inserted and fitted. As a result, the inner housing 7 is covered by the metal shell 9 connected to the braid 25, and the inner conductor is shielded from the external electric field, so that electromagnetic interference can be prevented.

[0006]

However, in the conventional braided connection structure, the connecting portion 9a of the metal shell 9 is connected to the braid 2
5, the shield wire 13
When the shield wire 13 is twisted when laying, particularly when a shield wire for a large current applied to an electric vehicle is twisted, the external force is directly applied to the crimped portion between the connection portion 9a and the braid 25. When the caulking part is loosened, the metal shell 9
And the braid 25 have a problem of poor contact, which degrades the shielding performance. On the other hand, in order to solve such a problem, wiring can be performed without twisting the shielded wire 13.
If the connector is to be attached to the shielded wire 13 in a predetermined direction, it is necessary to determine the direction of the connector at the time of assembling the electric wire (at the time of pre-assembly of the shielded wire and the connector) and perform the assembly. It was decided to lower. The present invention has been made in view of the above circumstances, and provides a braided connection structure of a shielded connector in which a connection portion between a metal shell and a braid does not loosen even when a shielded wire is twisted, and a reduction in shielding performance. It aims at prevention and improvement of workability.

[0007]

Means for Solving the Problems] braid connecting structure of the shield connector according to the present invention for achieving the above object, a metal shell to shield the conductor of the internal Konetaku, shielded cable
A shielded braided connection structure for connecting the shielded braid with the inner braided connection structure, wherein the inner housing provided with the terminal accommodating chamber is formed inside the outer housing, and a cylindrical metal shell is provided between the inner housing and the outer housing. provided by the insulating coating is crimped a tubular contact the shield braid exposed been excised, mounting the terminal fixed to said conductor to said terminal receiving chambers, said shield
The contact is in close contact with the metal shell against wire twist
And slidably provided with the metal shell.
It is characterized by being electrically connected to the metal shell .

[0008]

When the shield wire is twisted, the contact is slid relative to the metal shell in a state in which the contact is in close contact with the metal shell, and the external force due to the torsion does not concentrate on the crimped portion between the shield braid and the contact. As a result, the crimped portion between the shield braid and the contact does not loosen, and a reliable conduction state is ensured. Further, the contact portion is always in close contact with the metal shell and slides, and the contact between the contact and the metal shell is in close contact. A reliable conduction state is maintained also in the portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a braided connection structure for a shield connector according to the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a braided connection structure of a shielded connector according to the present invention, and FIG. 2 is an enlarged view of a portion A in FIG. A cylindrical inner housing 37 having a terminal accommodating chamber 35 is integrally formed in the cylindrical outer housing 33 of the female connector 31, and a shell insertion groove 39 is provided between the outer housing 33 and the inner housing 37. Is formed. A cylindrical metal shell 41 is inserted into the shell insertion groove 39 in contact with the outer periphery of the inner housing 37. An enlarged diameter portion 41 a is formed at the rear of the metal shell 41, and the enlarged diameter portion 41 a protrudes from the rear end of the inner housing 37 inside the outer housing 33.

The terminal housing 35 of the inner housing 37
Is provided with an elastic locking piece 43, and the elastic locking piece 43 can be engaged with a male terminal described later. Inner housing 37
A small diameter portion 45 having a reduced outer diameter is formed at the rear end of the
Thereby, an insertion gap 47 (see FIG. 2) is formed between the metal shell 41 and the small diameter portion 45. The metal shell 41 may be either inserted into the shell insertion groove 39 after the housing is formed and fixed by locking means (not shown), or may be embedded in the housing by integral molding when the housing is formed. Good.

On the other hand, a rod-shaped male terminal 53 is crimped to the conductor 51a of the insulating core wire 51 of the shield wire 49, and the male terminal 53
Has a flange portion 55 that engages with the elastic locking piece 43 in the terminal accommodating chamber 35 described above. When the male terminal 53 is inserted into the terminal accommodating chamber 35, the flange 55 abuts on the front wall 35 a of the terminal accommodating chamber 35, and at the same time, the rear surface thereof is locked by the elastic locking piece 43. That is, the flange portion 55
The front wall 35a and the elastic locking piece 43 hold the pinch, and the removal is restricted in a rotatable state.

The shield wire 49 is cut off at the end of the insulating coating 57, and the exposed braid 59 is folded back toward the insulating coating 57. The folded braid 59 is covered with a cylindrical contact 61, and the contact 61 is crimped to the braid 59 by caulking a rear crimping portion 61 a. At the front of the contact 61, an open cylindrical contact portion 63 having an enlarged diameter is formed, the contact portion 63 is inserted into the insertion gap 47, and the outer periphery is a metal shell 41.
Slidably in contact with the inner circumference of The contact portion 63 is a male terminal 5
The relative position with respect to the male terminal 53 is set so as to be inserted into the insertion gap 47 at the same time as the engagement between the third and the elastic locking pieces 43.

A waterproof / dustproof rubber plug 65 is attached to the shield wire 49 at the rear of the outer housing 33.
The rubber stopper 65 is held in the outer housing 33 by a rear holder 67.

In order to assemble the braided connection structure thus constructed, the insulating coating 57 at the end of the shield wire 49 is cut off, and the exposed braid 59 is folded back to the insulating coating 57 side.
The crimped portion 61 a of the contact 61 is swaged to the folded braid 59, and then the conductor 5 of the insulated core wire 51 of the shield wire 49 is formed.
The male terminal 53 is crimped to 1a. The procedure for attaching the contact 61 and the male terminal 53 may be reversed. Next, the male terminal 53 to which the shield wire 49 is crimped is inserted into the housing in which the metal shell 41 is inserted in the shell insertion groove 39 in advance, and the contact portion 63 of the contact 61 is inserted into the insertion gap 4.
7, the flange portion 55 and the elastic locking piece 4
3 is engaged. Lastly, the rubber stopper 65 is arranged at a predetermined position in the outer housing 33, and the rear holder 67 for holding the rubber stopper is mounted to complete the assembly.

The operation of the braided connection structure thus assembled is such that when the shield wire 49 is twisted, the contact 6
The first contact portion 63 slides relative to the metal shell 41 in a state in which the contact portion 63 is in close contact with the inner periphery of the metal shell 41, and external force due to torsion does not concentrate on the crimped portion between the braid 59 and the contact 61. As a result, the crimped portion between the braid 59 and the contact 61 does not loosen, a reliable conduction state is secured, and the contact portion 63 is always in close contact with the inner periphery of the metal shell 41 and slides. A reliable conduction state is maintained even in a close contact portion between the contact 61 and the metal shell 41. In this state, the male terminal 53 is rotatable in an arbitrary direction with the flange portion 55 sandwiched therebetween.

According to the braided connection structure of the shield connector described above, the metal shell 41 and the separate contact 61 are connected to the braid 5
9, the contact 61 is slidably in close contact with the metal shell 41, so that even when the shield wire 49 is twisted, external force does not concentrate on the braided connection portion, and a reliable conduction state is always ensured. And a reduction in shielding performance can be prevented. In addition, since there is no problem even if the shielded wire 49 is twisted when the shielded wire 49 is routed, it is not necessary to determine the direction of the connector when assembling the wire and to assemble the connector, thereby improving workability in assembling the wire. be able to.

In the above embodiment, the female connector 31
The braid connection structure has been described as an example. However, the male connector 71 shown in FIG.
3. By using the contact 75 and slidably contacting the contact 75 with the inner periphery of the metal shell 73, the same effect as described above can be obtained.

In the above-described embodiment, the contact portion 63 of the contact 61 is inserted into the inner peripheral side of the metal shell 41 so as to be slidably contacted. It may be inserted into the side and slidably in close contact. Furthermore, in the above-described embodiment, the connecting portion between the contact portion 63 and the metal shell 41 is formed into a cylindrical shape, and the cylindrical body is fitted. However, the connecting portion between the contact portion 63 and the metal shell 41 is An elastic contact piece may be formed by cutting out either one of the cylindrical bodies, and the elastic contact piece may be slidably in close contact with the other cylindrical body. With such a configuration,
The elastic contact piece can always be brought into contact with the other cylinder body in a biased state, and a stable conduction state can be obtained.

[0019]

As described in detail above, according to the braided connection structure of the shielded connector according to the present invention, a contact separate from the metal shell is crimped to the shield braid, and the contact is slidably formed of metal. Since it is in close contact with the shell, even when the shielded wire is twisted, the braided connection does not become loose and a reliable conduction state can be always ensured. As a result,
A reduction in shielding performance can be prevented. And
Since there is no problem even if the shielded wire is twisted at the time of arranging the shielded wire, it is not necessary to determine the direction of the connector at the time of assembling the wire, and to assemble the wire.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a braided connection structure of a shielded connector according to the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a sectional view when the braided connection structure according to the present invention is used for a female connector.

FIG. 4 is a cross-sectional view illustrating a braided connection structure of a conventional shielded connector.

[Explanation of symbols]

 31 Female Connector (Connector) 33 Outer Housing 35 Terminal Housing 37 Inner Housing 41 Metal Shell 49 Shield Wire 53 Male Terminal (Terminal) 57 Insulation Coating 59 Shield Braided 61 Contact 61a Crimping Part 63 Contact Part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 13/648-13/658 H01R 24/02

Claims (1)

(57) [Claims] 1. A braided connection structure of a shield connector for connecting a metal shell for shielding a conductor inside a connector and a shield braid of a shield wire, wherein an inner housing having a terminal accommodating chamber is provided inside an outer housing. formed, a cylindrical metal shell provided between the inner housing and the outer housing, the insulation coating crimp the tubular contacts the shield braid exposed is cut, said terminals secured to said conductors By installing in the terminal accommodating chamber, against the twist of the shield wire,
The contact is in close contact with the metal shell and the metal
A braided connection structure for a shielded connector provided slidably relative to a shell and electrically connected to the metal shell .