JPH10108346A - Terminal structure of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the leakage preventive effect of an EM I by holding a cable shield reversed toward the base end from the leading part of a coaxial cable between a fixing sleeve projected from a back shell and an inner sleeve, and fixing a fixing sleeve by calking. SOLUTION: The tip parts of a plurality of coaxial cables 1 are united together by a collection tape 14 and inserted into a fixing sleeve 13 projected in the rear part of a back shell 10 made of an electrically conductive metal and inserted thereinto. Next, an inner sleeve 12 is press-inserted on the outer side of the collection tape 14, and a cable shield 6 reversed toward the base end from the leading part 19 of the coaxial cables 1 is held between the fixing sleeve 13 and the inner sleeve 12 to firmly calk and fix the fixing sleeve 13. A protective tape 4 is wound on the outside of the cable shield 6 extending backward from the fixing sleeve 13 to eliminate the exposure of the cable shield 6, thereby being able to enhance the leakage preventive effect of the EM I.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness terminal structure.

[0002]

2. Description of the Related Art FIG. 3 shows a terminal structure of a conventional wire harness. In the figure, reference numeral 1 denotes a coaxial cable, and 2 denotes a conductive metal backshell. A plurality of coaxial cables 1 are assembled and inserted into an inlet 4 projecting from a back shell 2. The ends of the assembled coaxial cables 1 inserted into the introduction port 4 are bound together by an assembly tape 5. At the end of each coaxial cable 1, the cable shield 6 is turned backward (right side in FIG. 3) to expose the contact 7. The cable shield 6 is formed by knitting a conductive metal thin wire in a mesh shape, and has a length such that when the coaxial cable 1 is inserted into the back shell 2, the distal end projects backward of the inlet 4. The contact 7 is connected to a target terminal of a connector (not shown) mounted in front of the back shell 2 (left side in FIG. 3). The connector is generally welded and fixed to the back shell 2 to prevent loosening.

[0003] The cable shields 6 inverted from the respective coaxial cables 1 are fixed by being press-fitted into the inlet 4 together with one bundle of coaxial cables. The portion of the cable shield 6 projecting from the rear end of the inlet 4 is turned forward and fixed to the outer surface of the back shell 2 by welding.

[0004]

In the case of the terminal structure of the wire harness as described above, the cable shield 6 is fixed to the outer surface of the back shell 2 by welding. (2) In order to replace the terminal connecting the contact 7, it is necessary to break the welding between the back shell 2 and the connector to separate the connector and the back shell 2. It takes time to work. In the case of reassembling, it is troublesome, and there is a problem that the work efficiency is unsatisfactory.

The present invention has been made in view of the above-mentioned problems, and has as its object to provide a terminal structure of a lightweight wire harness which has an improved EMI leakage prevention effect and can be easily assembled and disassembled. Is what you do.

[0006]

The present invention has the following features to attain the object mentioned above. That is, in the terminal structure of the wire harness according to claim 1, a coaxial cable, a conductive backshell for internally protecting a contact exposed at a leading end of the coaxial cable, and an inner sleeve mounted outside the coaxial cable. A cable shield inverted from the exit portion of the coaxial cable toward the base end was sandwiched between a fixing sleeve and an inner sleeve protruding from the back shell, and the fixing sleeve was caulked and fixed. A terminal structure of a wire harness characterized in that it is a means for solving the above problem.

According to the present invention, the cable shield pulled out of the coaxial cable and inverted is caulked and fixed between the fixing sleeve and the inner sleeve, so that the cable shield is housed between the fixing sleeve and the inner sleeve. It is not exposed outside the backshell. If the cable shield protrudes from the fixing sleeve, the cable is shielded by wrapping a protective tape or the like containing a conductive wire on the outside. At this time, it is not necessary to guide the portion of the cable shield protruding from the fixing sleeve to the outer surface of the back shell as in the conventional example, so that a protective tape is wound around the outside of the cable shield extending along the coaxial cable. Just by doing, you can easily shield.
When fixing a plurality of coaxial cables in the fixing sleeve, the inner sleeve is attached to the outside where all the coaxial cables are assembled.

[0008] In the second aspect of the present invention, an extra length of contact is ensured between the connector mounted on the back shell at a position facing the coaxial cable and the lead-out portion of the coaxial cable. The terminal structure of the wire harness described in 1 is a means for solving the problem.

According to the present invention, when attaching / detaching the back shell to / from the connector, the contact moves within the extra length to prevent the occurrence of tensile stress. When the back shell is screwed to the connector, the contact can be prevented from being twisted. In the case where there are a plurality of contacts, the present invention also includes assembling these contacts by a binding member in the back shell and securing an extra length between the connector and the binding member. Further, the present invention includes equalizing the extra length of each contact, and increasing the extra length only for contacts having a large required wiring length variation.

According to the third aspect of the present invention, the back shell and the connector can be separated and integrated, and the back shell and the connector are provided with fixing projections, which are brought into contact with each other and fixed by welding when they are integrated, on their outer surfaces. The terminal structure of the wire harness according to claim 2 is provided as a means for solving the above-mentioned problem.

According to the present invention, when the back shell and the connector are integrated, the fixing projections are fixed by welding to maintain the integrated state. The welding of the fixing projections is preferably performed by spot welding the tips. This facilitates removal (cutting) of the welded portion when separating the back shell and the connector, and simplifies the separating operation. Moreover, when the back shell and the connector are integrated again,
Since the fixing protrusions may be welded again, separation and integration can be repeatedly performed within the range of the protrusion size of the fixing protrusion.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a terminal structure of a wire harness according to the present invention will be described below with reference to FIGS. In the figure, the same components as those in FIG. 3 are denoted by the same reference numerals, and description thereof will be simplified. In FIG. 1, reference numeral 10 denotes a back shell, 11 denotes a connector, and 12 denotes an inner sleeve.

The back shell 10 is made of a conductive metal and protects the inside of the contact 7 exposed at the leading end of the coaxial cable 1. At the rear (right side in FIG. 1) of the back shell 10, a fixing sleeve 13 into which a plurality of coaxial cables 1, 1,. The tip of one bundle of coaxial cables bundled by the collecting tape 14 is inserted into the fixing sleeve 13. The gathering tape 14 is a metal mesh stretched to reduce EMI leakage. The end of one bundle of coaxial cables reaches the housing 15 of the back shell 10.

The housing 15 has a front opening 16 (left side in FIG. 1) closed by a connector 11 and a compound 17 is filled therein. In the housing 15, a plurality of contacts 7 drawn from each coaxial cable 1 are bound by a binding member 18 such as a tape. The contact 7 and the binding member 18 are connected to the compound 17
It is buried inside. The tip of each contact 7 is connected to a terminal (not shown) of the connector 11. Each contact 11 has an extra length 20 at an appropriate position between the outlet 19 of the coaxial cable 1 and the connector 11.

The front opening 16 of the housing 15 is adapted to be screwed to a screwing sleeve 21 protruding from the connector 11 so that the housing 15 and the screwing sleeve 21 can be rotated in the opposite directions. , The back shell 10 and the connector 11
And are detachable. The back shell 10 and the screw-in sleeve 21 are provided with fixing projections 22 and 23 which are brought into contact with each other at the time of integration and fixed by welding, respectively, to project from the outer surfaces. The fixing projection 22 on the back shell 10 side
The fixing projection 23 on the connector 11 side (the side of the screwing sleeve 21) protrudes outward from the front end of the front opening 16, and projects outward from the base of the screwing sleeve 21. When the screw is screwed to the far side, the fixing projections 22 and 23 come into contact with each other, and the back shell 10 and the connector 11 are positioned.

As shown in FIG. 2, the inner sleeve 12
Are press-fitted outside the collecting tape 14 at the end of one bundle of coaxial cables. On the outer surface of the inner sleeve 12, a cable shield 6 inverted from the outlet 19 of the coaxial cable 1 toward the base end is disposed. The cable shield 6 is distributed on the outer surface of the inner sleeve 12 on average, and is inserted between the fixing sleeve 13 and the inner sleeve 12 by inserting a bundle of coaxial cables into the fixing sleeve 13. It is firmly fixed in the state. The inner sleeve 12 is made of a conductor such as stainless steel to reduce EMI leakage.

A portion of the cable shield 6 which is pulled out from the outlet 19 is provided with about 3
It is twice as long and extends rearward of the inner sleeve 12 along the collecting tape 14. In FIG. 2, a protection tape 24 is wound around the outside of the cable shield 6 extending rearward from the fixing sleeve 13, and binds the cable shield 6 integrally with one coaxial cable bundle to protect it from dispersion. ing. The protective tape 24
Is a tape with a metal mesh similarly to the collecting tape 14, which reduces leakage of EMI.

The operation and effect of the present embodiment will be described below. In the terminal structure of the wire harness, the cable shield 6 pulled out of the coaxial cable 1 and turned over is
Since it is caulked and fixed between the fixing sleeve 13 and the inner sleeve 12, it can be firmly fixed by a simple fixing operation. Further, since the cable shield 6 is prevented from being exposed by the fixing sleeve 13 and the protective tape 24, the effect of preventing EMI from leaking is remarkably improved as compared with the conventional structure. In addition, since the cable shield 6 is not fixed by soldering, the weight can be reduced.

By rotating the housing 15 with respect to the screwing sleeve 21, the back shell 10 and the connector 11 are separated and integrated. At this time, the contact 7 has an extra length 20
And the occurrence of tensile stress is prevented, and the connection state between the connector 11 and the contact 7 is not affected.
Further, the compound 17 also functions to absorb the displacement force acting on the contact 7 and to maintain the disconnection and the stable connection state. The extra length 20 of the contact 7 is the back shell 1
It is more preferable that the distance from the rotation axis at the time of separation and integration of the connector 0 and the connector 11 be increased so as to correspond to the difference in displacement due to rotation.

By fixing the fixing projections 22 and 23 projecting from the back shell 10 and the connector 11 by welding, the integrated state of the back shell 10 and the connector 11 is maintained. The welding of the fixing projections 22 and 23 is preferably performed by spot welding the tips thereof. This facilitates removal (cutting) of the welded portion when separating the back shell 10 and the connector 11, thereby simplifying the separating operation and reducing the weight. In addition, when the back shell 10 and the connector 11 are integrated again, the fixing projections 22 and 23 may be re-welded to each other. It can be done repeatedly.

It goes without saying that the shape of each component such as the back shell 10 can be changed as appropriate. If the cable shield 6 pulled out from the outlet 19 has a length that does not protrude from the fixing sleeve 13, the protective tape 24 is unnecessary. The structure for attaching and detaching the back shell 10 and the connector 11 is not limited to the screwing described in the present embodiment as long as they can be separated and integrated.

[0022]

As described above, according to the terminal structure of the wire harness according to the first aspect, the cable shield which is inverted from the lead-out portion of the coaxial cable toward the base end,
The structure in which the fixing sleeve is sandwiched between the fixing sleeve protruding from the back shell and the inner sleeve, and the fixing sleeve is caulked and fixed. (1) The cable shield pulled out from the coaxial cable and inverted is used as the fixing sleeve and the inner sleeve. And is not exposed because it is stored between
I can reduce the leakage of I. (2) The cable shield can be easily fixed simply by swaging the fixing sleeve. There are excellent effects such as improvement of work efficiency and (3) weight reduction as compared with the conventional example in which the cable shield is fixed by welding.

According to the terminal structure of the wire harness according to the second aspect, the contact has an extra length between the connector mounted on the back shell facing the coaxial cable and the lead-out portion of the coaxial cable. When the back shell is attached to or detached from the connector, the contact moves within the extra length to prevent the occurrence of tensile stress, so that the connection state between the contact and the connector is stably maintained and the contact is disconnected. And the like can be prevented.

According to the terminal structure of the wire harness according to the third aspect, when the back shell and the connector are integrated, the fixing projections projecting from the outer surfaces of the back shell and the connector are fixed by welding. The backshell and the connector can be easily separated simply by removing (cutting) the welded portion,
Separation work is simplified. Moreover, when the back shell and the connector are integrated again, the fixing projections need only be welded again, so that the fixing projections can be separated within the range of the protrusion dimensions.
It is possible to repeatedly perform the integration, and an excellent effect is obtained in that the work of changing the connection between the contact and the connector becomes easy.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a terminal structure of a wire harness of the present invention.

FIG. 2 is an enlarged sectional view showing a rear part of the terminal structure of FIG.

FIG. 3 is a front sectional view showing a terminal structure of a conventional wire harness.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Coaxial cable 6 Cable shield 7 Contact 10 Backshell 11 Connector 12 Inner sleeve 13 Fixing sleeve 19 Exit part 20 Extra length 22 Fixing projection 23 Fixing projection

Claims (3)

[Claims] 1. A coaxial cable (1), a conductive backshell (10) for internally protecting a contact (7) exposed at a leading end of the coaxial cable, and an inner sleeve mounted outside the coaxial cable. (12), and a cable shield (6) inverted from the lead-out portion (19) of the coaxial cable toward the base end is provided with a fixing sleeve (13) projecting from the back shell and an inner sleeve. A terminal structure of a wire harness, wherein the terminal structure is sandwiched and fixed by caulking a fixing sleeve. 2. An extra contact (20) is secured between a connector (11) mounted on a position facing the coaxial cable of the back shell and a lead-out portion of the coaxial cable. 2. The terminal structure of the wire harness according to claim 1. The back shell and the connector can be separated and integrated, and the back shell and the connector are fixed to each other and fixed by welding when they are integrated.
The terminal structure of a wire harness according to claim 2, wherein each of (3) is protruded from an outer surface.