JP2587784Y2 - Shield case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention shields a shield case, particularly an electric connector, to shield electromagnetic noise from the outside or to the outside, and also holds a multi-core cable drawn from the electric connector. Shield case.

[Conventional technology and issues to be solved]

Conventionally, as shown in FIG. 4, a cable clamp member 10 is used to hold a multi-core cable pulled out from a connector.
0 was widely used (Japanese Utility Model Application Laid-Open No. 61-101979).
Although this cable clamp member 100 securely holds the multi-core cable 110, it is formed separately from the shield case 120 and requires screws 130 to stop, so that the number of parts is increased and the assembly work efficiency is increased. It had the disadvantage of being bad.

Therefore, as shown in FIG. 5, a shield case 160 (for example, an actual flat panel 1-158674) in which a cable clamp portion 140 for holding the outer jacket of the multi-core cable 110 so as to surround it is formed integrally with the shield case body 150. The "one shield case part" shown in Japanese Unexamined Patent Publication (Kokai) No. HEI 7-203 (1994) has recently been used. The cable clamp 140 is integral with the shield case main body 150 and does not require other fixing tools such as screws. Therefore, the number of parts is reduced, and the multi-core cable 110 can be fixed by a short crimping operation, so that there is an advantage that the operation efficiency is good.

However, the crimped cable clamp 140
When an external force is applied in a direction (arrow A) twisting (rotating with respect to the axis of the multi-core cable 110) with respect to the multi-core cable 110, the crimping is loosened, and the multi-core cable 110 is sufficiently held. There is a problem that can not be obtained.

Therefore, an object of the present invention is to provide a novel shield case which solves the above-mentioned drawbacks of the conventional shield case.

[Means for solving the problem]

The shield case of the present invention has a main body surrounding the electrical connector, and a pair of strips formed integrally with the main body and surrounding the cable jacket connected to the electrical connector in both directions. A pair of claws that bite into the jacket of the multi-core cable are formed at both end positions near the tip of each of the cable clamp portions, and the claws are formed by the cable clamp portions. An edge which is defined by a substantially L-shaped notch from a side edge of the cable clamp portion, and which is bent in an inclined direction so as to extend inward in a direction substantially opposite to the direction of the tip of the cable clamp portion, and suppresses rotation of the cable. It is characterized by comprising a plate-shaped piece configured to obtain.

Therefore, when an external force such as twisting is applied to the multi-core cable, the claws provided on the cable clamp section bite into the outer jacket of the multi-core cable, thereby effectively preventing the cable clamp section from loosening.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of an electric harness including one embodiment of a shield case of the present invention. FIG. 2 is an assembly diagram of an embodiment of the shield case of the present invention and an electrical connector. FIG. 3 is a sectional view taken along the line III-III of FIG.

In FIG. 1, the shield case is composed of an upper first shield case 10 and a lower second shield case 12, and is a mating connector (not shown) of the electrical connector 14.
And surrounding the entire surface except the mating surface 16 and the multi-core cable 18 side. The two shield cases 10, 12 are both formed by punching and bending a metal plate such as stainless steel. The first shield case 10 includes an upper wall 28 having locking projections 24, 24 for locking into the holes 22, 22 of the metal shell 20 of the electrical connector 14 and a contact protrusion 26 for contacting the shell 20. Left and right (only the right side is shown) side walls 32, 32 having holes 30, 30;
A rear wall 36 having a cable outlet 34 (the mating surface 16 side is the front,
The opposite side is the back). The second shield case 12 includes a main body 44 having a bottom wall 38 and left and right side walls 40 and 42, and a cable clamp 46 formed integrally with a rear end of the main body 44. Like the first shield case 10, the bottom wall 38 is provided with locking projections 48, 48 and a contact projection 50. Also, the side walls 40 and 42 are the first shield case 1
The side walls 40 are formed with projections 52, 52 respectively engaging with the locking holes 30, and the side wall 40 has cut-and-raised pieces 54, 54 protruding inwardly and protruding outwardly, and lock arms 56 Fulcrum 58
L-shaped protruding piece 60 for supporting is formed. on the other hand,
The cable clamp 46 has a substantially U-shaped cross section, and has a length sufficient to surround the outer periphery of the multi-core cable 18. The two ends 62 and 64 of the cable clamp portion 46 facing upward have respective chevron shapes so as to complement each other during crimping.
It is formed in a trough. Outside the vicinity of each tip 62, 64, there is a claw 66 extending inward in a direction substantially opposite to the direction of each tip 62, 64.
Is paired. A beaded portion 68 is formed substantially at the center of the cable clamp portion 46 along the longitudinal direction to reinforce crimping and make the cable clamp portion 46 hard to loosen.

Electrical connector 14 surrounded by the above-mentioned shield case
A contact (not shown) which is housed and held in two steps in the insulating housing 70;
It is composed of a shell 20 covering the periphery of 16 and upper and lower covers 72 covering a pressure contact portion (not shown) of the contact. Also,
The electric harness including the electric connector 14 includes an electric connector 14 in addition to the electric connector 14 and the shield cases 10 and 12.
Cable 18 and second shield case 12
Locking arms 56, 56 that are pivotally supported by the projecting pieces 60 of the mating connector and are locked to the engagement portions (not shown) of the mating connector, and an enclosure made of an insulating material that further covers the shield cases 10, 12 surrounding the electrical connector 14. Consists of 74.

Next, a procedure for manufacturing the electric harness will be described. First, the jacket 76 (see FIG. 3) at the end of the multi-core cable 18 is removed for a certain length, and a shield portion 78 such as a braided wire (see FIG. 3).
Turn back. Then, a conductive tape 82 is wound around the folded shield portion 80 to fix the shield portion 80. Next, the coated core wire 84 of the multi-core cable 18 corresponding to the press-contact portion (not shown) of the contact housed and held in the insulating housing 70 (the shell 20 is already attached) is press-connected, and Covers 72,72 to protect and insulate Then, the electrical connector 14 to which the multi-core cable 18 is connected
Is placed on the second shield case 12. At this time, the locking projections 48 on the bottom wall 38 of the second shield case 12 are
Hole not shown (lower hole corresponding to hole 22 of shell 20)
And the cut-and-raised pieces 54, 54 of the side walls 40, 40 regulate the rear end of the electric connector 14, thereby positioning the electric connector 14. Then, with the multi-core cable 18 placed on the cable clamp 46, the cable clamp 46 is crimped using a known crimping machine. In the crimped state, the claws 66 of the cable clamp 46 bit into the conductive tape 82, the folded shield 80, and the jacket 76 as shown in FIG. For this reason, even if an external force that rotates with respect to the axis of the multicore cable 18 is applied, the rotation is prevented. Further, even if rotation cannot be prevented, the claws 66 that bite into the jacket 76 follow the rotation, and in any case, the cable clamp portion 46 is prevented from loosening. Note that the protrusion amount of the claw 66 is such that it does not penetrate the jacket 76 (for example, half of the jacket thickness).
When set to, the coated core wire 84 is not adversely affected.

Next, by locking the locking hole 30 of the first shield case 10 with the projection 52 of the second shield case 12,
As shown in the figure, the electrical connector 14 is connected to both shield cases 10, 1
Surround with 2. At this time, since the projecting piece 60 of the second shield case 12 projects outward from the gap between the two side walls 32 of the first shield case 10, the fulcrum 58 of the lock arm 56 is pivotally supported on the projecting piece 60. Let it. After that, pass the multi-core cable 18 in advance and place the shield case in the enclosure 74.
When the electric connector 14 covered by the shields 10 and 12 is inserted, the projections 86 of the shield cases 10 and 12
The enclosure 74 and the electrical connector 14 are connected to each other, and the electrical harness is completed. At this time, the insulating operation portion 88 of the lock arm 56 is exposed from the opening 92 of the enclosure 74 while being urged outward by the metal leaf spring 90.

In the electric harness manufactured as described above, the pawl 66 provided on the cable clamp portion 46 comes into contact with the conductive tape 82 and the shield portion 80 with high pressure, and the contact resistance is suppressed low. Therefore, the electromagnetic wave noise incident toward the multi-core cable 18 is shielded by the shields 78 and 80, the conductive tape 82, the cable clamp 46, the second shield case 12, the contact protrusion 50,
The ground is quickly grounded through the shell 20 and the shell (not shown) of the mating connector or by another route.

In the above embodiment, the claws 66 of the cable clamp portion 46 are used.
Are provided on both sides in the vicinity of both ends 62 and 64, however, the position and number of the claws 66 are not limited to the above embodiment.

In the above embodiment, the shield case is composed of two upper and lower members. However, the shield case may be a single unit, or may be composed integrally with a hinge or the like.

[Effect of the invention]

The shield case of the present invention has a plate-like configuration formed by bending the pair of band-shaped cable clamp portions integrally formed so as to extend inward in a direction substantially opposite to the direction of the tip at each side end position. The claw bites into the cable jacket to securely support the cable, so that the edge of the claw prevents rotation of the cable even when an external force that rotates with respect to the cable axis is applied. Further, at this time, a force acts on the claws so as to follow the rotation of the cable, so that the cable clamp portion supporting the cable is prevented from loosening. This is because the extending directions of the plate-shaped claws formed on the pair of cable clamp portions are opposite to each other with respect to the rotation direction.
When an external force is applied in the rotation direction, the edge of one of the cable clamps of the pair of cable clamps that bites into the cable jacket functions to prevent rotation. , The one cable clamp portion that functions to prevent rotation acts to tighten the cable. Moreover, since the claws of the cable clamp contact the shield of the multi-core cable with high pressure at the same time as the conventional crimping work of the cable clamp, this contributes to the effect of suppressing and stabilizing the resistance value of the ground path. . Also, no special operation or tool is required for such a crimping operation.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an electric harness including an embodiment of a shield case of the present invention, FIG. 2 is an assembly view of an embodiment of the shield case of the present invention and an electric connector, and FIG.
FIG. 4 is a sectional view taken along the line III-III of FIG. 4, FIG. 4 is a view showing a conventional cable clamp member, and FIG. 5 is a view showing problems of the conventional shield case. 10, 12 ... shield case 14 ... electrical connector 18 ... multi-core cable 44 ... shield case body 46 ... shield case cable clamp 66 ... claws, 76 ... jacket

Continuation of the front page (56) References Japanese Utility Model Showa 64-43570 (JP, U) Japanese Utility Model Showa 62-20478 (JP, U) Japanese Utility Model Utility Model 1-158674 (JP, U) Japanese Utility Model Showa 62-195985 (JP) , U) Actually open 63-139774 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) H01R 13/56-13/58 H01R 13/648-13/658

Claims (1)

(57) [Scope of request for utility model registration] A main body surrounding the electrical connector and a pair of strips formed integrally with the main body and surrounding the cable jacket connected to the electrical connector from both directions. In a shield case having a cable clamp portion, a pair of claws that bite into a jacket of the multi-core cable are formed at both end positions near the tip of each of the cable clamp portions. An edge formed by a substantially L-shaped cut from a side edge and bent in an inclined direction so as to extend inward in a direction substantially opposite to the direction of the distal end of the cable clamp portion to stop rotation of the cable. A shield case comprising a plate-like piece configured.