JPH08250219A - Braid connecting structure for shield connector - Google Patents

Abstract

PURPOSE: To provide braid connecting structure in which no looseness is produced in the connecting part of a metal shell and a braid even if a shield wire is twisted to prevent drop in shielding performance and enhance working capability. CONSTITUTION: An inner housing 37 having a terminal housing room 35 is formed inside an outer housing 33, and a cylindrical metal shell 41 is arranged between the inner housing 37 and the outer housing 33. A cylindrical contact 61 is pressed for bonding against a shield braid 59 exposed by cutting-out an insulating cover 57. A terminal 53 fixed to a shield wire 49 is mounted on the terminal housing room 35, and the contact 61 is fit to the metal shell 41 so as to be capable of sliding to electrically connect the contact 61 with the metal shell 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure of 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 Shielded connectors prevent electromagnetic interference by covering the connector with a conductive cover (hereinafter referred to as "metal shell") and shielding the inner conductor from an external electric field. The metal shell is electrically connected to the shield braid of the shielded wire (hereinafter, referred to as “braid”). FIG. 4 is a sectional view showing a conventional braided connection structure of a shield connector. The shield connector comprises a matable male connector and a female connector, and both have basically the same structure. For example, in the female connector 1 shown in the figure, a tubular inner housing 7 having a terminal accommodating chamber 5 is integrally molded in a tubular outer housing 3. A shell insertion groove 11 for assembling 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 onto the conductor 15a of the insulating core wire 15 of the shielded wire 13
Has a flange portion 21 that engages with the elastic locking piece 19 in the terminal accommodating chamber 5. In the shielded wire 13, the end portion of the insulating coating 23 is cut off, and the exposed braid 25 is folded back to the insulating coating 23 side. The folded braid 25 is covered with the connecting portion 9a of the metal shell 9, and the connecting portion 9a is crimped to be crimped to the braid 25. As a result, the braid 25 and the metal shell 9 are electrically connected.

A male terminal 17 crimped to the shielded wire 13
By being inserted into the terminal accommodating chamber 5, the flange portion 21
Engages with the elastic locking piece 19 to restrict removal. 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 shielded wire 13 located at the rear portion of the outer housing 3, and the rubber plug 27 is attached to the outer housing 3 by a rear holder 29.
Retained within.

The female connector 1 constructed as described above is fitted to a male connector (not shown) which is constructed in substantially the same manner, and the metal shells 9 exposed at the tips of both are fitted. As a result, the inner housing 7 was covered with the metal shell 9 connected to the braid 25, and the inner conductor was shielded from the external electric field, whereby electromagnetic interference could be prevented.

[0006]

However, in the conventional braided connecting structure, the connecting portion 9a of the metal shell 9 is braided.
Since it was crimped by crimping to 5, shielded wire 13
When the shield wire 13 is twisted when arranging the cable, especially when the shield wire for large current applied to an electric vehicle is twisted, its external force is directly applied to the crimped portion between the connecting portion 9a and the braid 25. By loosening the caulking part, the metal shell 9
There was a problem that poor contact between the braid 25 and the braid 25 occurred and the shield performance was deteriorated. On the other hand, in order to solve such a problem, it is possible to install the shielded wire 13 without twisting it.
If the connector is attached to the shielded wire 13 in a predetermined direction, it is necessary to determine the direction of the connector when assembling the electric wire (during the pre-assembly of the shielded wire and the connector), and the workability is improved. It will be lowered. The present invention has been made in view of the above circumstances, and provides a braided connection structure of a shield connector in which a connection portion between a metal shell and a braid does not loosen even when a shielded wire is twisted, and the shield performance is deteriorated. The purpose is to prevent and improve workability.

[0007]

A braided connection structure for a shielded connector according to the present invention for achieving the above object is a braided connection for a shielded connector for connecting a metal shell for shielding a conductor inside a connector and a shielded braid. In the structure, an inner housing having a terminal accommodating chamber is formed inside the outer housing, and a cylindrical metal shell is provided between the inner housing and the outer housing.
A cylindrical contact is crimped to the shield braid exposed by cutting off the insulating coating, the terminal fixed to the shield wire is mounted in the terminal accommodating chamber, and the contact is slidable on the metal shell. It is characterized in that the contactor and the metal shell are electrically connected to each other by being fitted to.

[0008]

When the shield wire is twisted, the contactor slides relative to the metal shell in a state where the contactor is in close contact with the metal shell, and the external force due to the twisting is not concentrated on the crimped portion between the shield braid and the contactor. As a result, the crimping part between the shield braid and the contact is not loosened, a reliable conduction state is secured, and the contact part is always in close contact with the metal shell and slides, and the contact part and the metal shell are in close contact with each other. A reliable conductive state is maintained even in the portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a braided connection structure of a shield connector according to the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a braided connection structure of a shield connector according to the present invention, and FIG. 2 is an enlarged view of part A of FIG. A cylindrical outer housing 33 of the female connector 31 is integrally molded with a cylindrical inner housing 37 having a terminal accommodating chamber 35, 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 41a is formed at the rear portion of the metal shell 41, and the enlarged diameter portion 41a is projected from the rear end of the inner housing 37 inside the outer housing 33.

The terminal housing chamber 35 of the inner housing 37
An elastic locking piece 43 is provided on the 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 rear end,
As a result, 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 one inserted into the shell insertion groove 39 after molding the housing and fixed by a locking means (not shown), or one embedded in the housing by integral molding when molding the housing. 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 shielded wire 49,
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 portion 55 contacts the front wall 35a 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 is
The front wall 35a and the elastic locking piece 43 are in a sandwiched state, and the removal is restricted in a rotatable state.

In the shielded wire 49, the end portion of the insulating coating 57 is cut off, and the exposed braid 59 is folded back to the insulating coating 57 side. The folded braid 59 is covered with a cylindrical contactor 61, and the contactor 61 is crimped to the braid 59 by crimping the crimping portion 61a at the rear portion. An expanded cylindrical contact portion 63 having an enlarged diameter is formed in the front portion of the contactor 61, and the contact portion 63 is inserted into the insertion gap 47, and the outer circumference thereof is the metal shell 41.
Slidably close to 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 when the elastic locking piece 43 and the elastic engagement piece 43 are engaged.

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

To assemble the braided connection structure thus constructed, the insulating coating 57 at the end of the shielded wire 49 is cut off, and the exposed braid 59 is folded back to the insulating coating 57 side.
The crimp portion 61a of the contactor 61 is crimped to the folded braid 59, and then the conductor 5 of the insulating core wire 51 of the shield wire 49 is tightened.
The male terminal 53 is crimped to 1a. The procedure of 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 previously inserted into the shell insertion groove 39, and the contact portion 63 of the contact 61 is inserted into the insertion gap 4
7 and the flange 55 and the elastic locking piece 4 at the same time.
3 and 3 are engaged. Finally, the rubber plug 65 is placed at a predetermined position in the outer housing 33, and the rear holder 67 for holding the rubber plug is attached to complete the assembly.

The function of the braided connection structure thus assembled is that when the shield wire 49 is twisted, the contact 6
In the state where the first contact portion 63 is in close contact with the inner circumference of the metal shell 41, the first contact portion 63 slides relative to the metal shell 41, and the external force due to the twist is not concentrated on the crimped portion between the braid 59 and the contact 61. As a result, the caulking portion between the braid 59 and the contact 61 is not loosened, a reliable electrical connection is ensured, and the contact portion 63 always slides in close contact with the inner circumference of the metal shell 41. Even in the close contact portion between the contact 61 and the metal shell 41, a reliable conductive state is maintained. In this state, the flange 55 of the male terminal 53 is clamped so that the male terminal 53 can rotate in any direction.

According to the above-mentioned braided connection structure of the shielded connector, the metal shell 41 and the separate contactor 61 are braided 5
Since the contactor 61 is slidably brought into close contact with the metal shell 41 by crimping to 9, the external force is not concentrated on the braided connection portion even when the shield wire 49 is twisted, and a reliable conduction state is always ensured. It is possible to prevent the deterioration of the shield performance. Further, since there is no problem even if the shielded wire 49 is twisted when the shielded wire 49 is installed, it is not necessary to decide the direction of the connector for assembly when assembling the wire, thus improving workability during wire assembly. be able to.

In the above embodiment, the female connector 31 is used.
Although the braided connection structure has been described by taking as an example, the metal shell 7 having substantially the same configuration is also used in the male connector 71 shown in FIG.
3. By using the contactor 75 and slidably contacting the contactor 75 with the inner circumference of the metal shell 73, the same effect as described above can be obtained.

Further, in the above-mentioned embodiment, the contact portion 63 of the contact 61 is inserted into the inner peripheral side of the metal shell 41 and slidably brought into close contact therewith. However, the contact portion 63 is the outer periphery of the metal shell 41. It may be slidably attached by being inserted into the side. Further, in the above-described embodiment, the connecting portions between the contact portion 63 and the metal shell 41 are both tubular and the tubular bodies are fitted together. 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 one of the cylindrical bodies, and the elastic contact piece may be slidably in close contact with the mating cylindrical body. With this 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 shield connector according to the present invention, the metal shell and a separate contactor are crimped to the shield braid so that the contactor is slidable. Since it is in close contact with the shell, even when the shielded wire is twisted, the braided connecting portion does not loosen, and a reliable conductive state can be always ensured. As a result,
It is possible to prevent the deterioration of the shield performance. And
Since there is no problem even if the shielded wire is twisted when arranging the shielded wire, it is not necessary to determine the direction of the connector for assembly when assembling the electric wire, and workability at the time of assembling the electric wire can be improved.

[Brief description of drawings]

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

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

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

FIG. 4 is a cross-sectional view showing a conventional braided connection structure of a shield connector.

[Explanation of symbols]

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

Claims (2)

[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, wherein an inner housing provided with a terminal accommodating chamber is formed inside the outer housing, A cylindrical metal shell is provided between the inner housing and the outer housing, and a cylindrical contact is crimped to the shield braid exposed by cutting off the insulating coating, and the terminal fixed to the shield wire is accommodated in the terminal. A braided connection structure for a shield connector, characterized in that the contactor and the metal shell are electrically connected to each other by mounting the contactor in a chamber and slidably fitting the contactor to the metal shell. 2. A small-diameter tubular crimping portion to be crimped to the shield braid is formed at one end of the contactor, and a large-diameter tubular contacting portion is formed at the other end of the contactor. The braided connection of the shield connector according to claim 1, wherein the contact and the metal shell are electrically connected to each other by slidably fitting the inner periphery of the cylindrical metal shell. Construction.