JPH0623179U - Shielded cable connector - Google Patents

Abstract

(57) [Abstract] [Purpose] A shielded cable connector that can be made compact and lightweight and that also improves the connection work with the shielded cable is obtained. [Structure] The connector 3 includes a metallic shell 31, an insulator assembly 12 that holds a contact 16 and is inserted and fixed in a predetermined position in the shell 31, a core wire 23, and a braid 2.
The shielded cable 2 in which the core wire 23 is connected to the contact 16 by terminal treatment so that 2 are sequentially exposed, the shell wire 31 surrounding the core wire 23 of the shielded cable 2, and the braid 22 and the jacket 21 of the shielded cable 2 on the other end side. It is made up of a tubular metal net 32 overlaid and a heat shrink tube 33 covering the net 32. The net 32 is a heat shrink tube 3
Shrinkage pressure caused by heating 3 causes shell 31 and cable 2
It is characterized by being fixed to.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a shielded cable connector used in electronic devices and the like that require EMI countermeasures.

[Prior art]

 There are various types of connectors for shielded cables (hereinafter referred to as connectors) for connecting shielded cables, and Fig. 3 shows an example of this type of connector attached to a shielded cable. The connector 1 has a shell 11, an insulator assembly 12 inserted into the shell 11 and holding a plurality of pin contacts 16, and an end bell 13 attached to the shell 11 and fixing the shielded cable 2. The shell 11 is formed by forming a metal material into a cylindrical shape, and has an external thread 11a screwed into the end bell 13 on one end side on the outer peripheral surface thereof. In addition, an annular convex portion 11b and a groove 11c for mounting the insulator assembly 12 are formed on the inner peripheral surface with a predetermined interval. The insulator assembly 12 includes front and rear insulators 14 and 15 and pin contacts 16 having contact holes 14a and 15a formed therethrough. The pin contact 16 is provided with a contact portion 16a on the front end side and a connecting portion 16b on the rear end, and has a flange portion 16c between the contact portion 16a and the connecting portion 16b. The end bell 13 is formed into a cylindrical shape by forming a cable through hole 13a at the center by processing a metal material. An internal thread 13b that is screwed into the external thread 11a of the shell 11 is engraved on the inner peripheral surface of the end of the end bell 13, and a clamp portion 13c that fixes the shield cable 2 is integrally formed on the rear end side. As shown in FIG. 3B, the clamp portion 13c has a curved portion 13d that is in contact with the outer circumference of the cable 2 and a horizontal portion 13e that extends in the horizontal direction from the left and right of the curved portion 13d. A clamp metal fitting 17 formed in substantially the same shape as the clamp portion 13c is attached to the clamp portion 13c with a screw 18, and the shielded cable 2 is sandwiched between the clamp portion 13c and the clamp metal fitting 17. Next, in order to connect the shielded cable 2 to the connector 1 having the above configuration, the insulator assembly 12 is first assembled. The insulator assembly 12 is assembled in a state in which the contact portion 16a side of the pin contact 16 is inserted into the contact hole 14a of the front insulator 14 and the flange portion 16c and the connection portion 16b are inserted into the contact hole 15a of the rear insulator 15. Next, the insulator assembly 12 is inserted into the shell 11 with the contact portion 16a side of the pin contact 16 first, and the projection 11b in the shell 11 is brought into contact with the front insulator 14, and then the retaining ring 19 is fitted in the groove 11c. It is fixed by mounting. On the other hand, the end bell 13 is passed through the shielded cable 2, and the end portion is end-treated as shown in FIG. That is, the outer cover 21 is cut off, the braid 22 and the core wire 23 are exposed by a required length, and then the braid 22 is bent and overlapped on the outer periphery of the end portion of the outer cover 21 as indicated by the two-dot chain line in the figure. Next, after the conductor 23a exposed from the tip of the core wire 23 of the shield cable 2 is soldered to the connection portion 16b of the pin contact 16, the end bell 13 is screwed onto the rear end of the shell 11. Next, the clamp metal fitting 17 is put on the braid 22 and the jacket 21 located on the curved portion 13d of the clamp portion 13c of the end bell 13, and the shield cable 2 is fixed by the screw 18. In the connector 1 assembled as described above, the braid 22 of the shielded cable 2 is sandwiched between the clamp portion 13c and the clamp metal fitting 17 and comes into contact therewith, so that the end bell 13 and the male screw 11a and the female screw 13b are connected to each other. It is electrically connected to the shell 11 to obtain a shielding effect.

[Problems to be solved by the device]

 By the way, the connector 1 described above is required to be smaller and lighter along with the miniaturization of electronic devices. However, in the structure in which the shell 11 and the braid 22 of the shielded cable 2 are electrically connected via the end bell 13. However, it was difficult to reduce the size and weight. Further, in the work of connecting the connector 1 and the shielded cable 2, since the braid 22 is brought into contact between the clamp portion 13c of the end bell 13 and the clamp metal fitting 17, it is necessary to fold the braid 22 back onto the jacket 21. Therefore, the end of the braid 22 was easily unraveled and it took time and effort to connect it. The present invention has been made to eliminate such drawbacks, and it is possible to obtain a shielded cable connector that can be made smaller and lighter and that also improves the work of connecting shielded cables.

[Means for solving the problem]

 The present invention relates to a shielded cable connector in which a core wire is braided and connected to a shielded cable that is sequentially covered with an outer cover. An insulator assembly is inserted and fixed in a predetermined position in the shell while holding a metal shell and a contact. A shield cable in which the three-dimensional body, the core wire, and the braid are end-treated so that the core wire is connected to the contacts, and the core wire of the shielded cable is surrounded by one end of the shell and the other end of the cable braid and It consists of a tubular metal net over the jacket and a heat-shrinkable tube covering the net, and the net is fixed to the shell and the cable by the shrinking pressure of the heat-shrinkable tube due to heating. It electrically connects with the braid. As described above, in the connector of the present invention, the connecting portion between the shell and the shielded cable is covered with the metallic net, and the circumference of the net is covered with the heat shrinkable tube. By heat-shrinking and deforming this heat-shrinkable tube, the net is pressed and fixed to the shell at one end and the shield cable at the other end, and the shell and the braid of the shield cable are electrically connected to each other. A shielded cable connector that is smaller and lighter than a connector can be obtained.

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. It should be noted that components having the same function and structure as the members of the connector 1 shown in the conventional example in the drawings are denoted by the same reference numerals and detailed description thereof will be omitted. The connector 3 of the present invention includes a shell 31, an insulator assembly 12 having the same structure as the conventional example, which is incorporated in the shell 31, and a metallic net 32 covering the connection end side of the shielded cable 2 from the rear end side of the shell 31. , A heat-shrinkable tube 33 that covers the net 32. The shell 31 has the same structure as the conventional one except that a ring-shaped convex portion 31a is formed on the outer peripheral surface on the rear end side instead of the conventional male screw 11a. The net 32 is formed by, for example, knitting a flexible conductive metal wire in a mesh shape and forming a cylindrical shape with both ends open. Therefore, the net 32 can be expanded and contracted not only in the axial direction but also in the radial direction in accordance with the connection point between the connector and the shielded cable. Next, in order to connect the shielded cable 2 to the connector 3 of the present invention, first, the insulator assembly 12 is mounted in the shell 31 in the same manner as in the conventional example. On the other hand, the heat shrinkable tube 33 and the net 32 are passed through the shielded cable 2 as shown in FIG. Further, the distal end portion is subjected to the terminal treatment as shown in FIG. 4, but at this time, the terminal treatment is performed without folding back the braid 22 on the jacket 21 as in the conventional example. Next, after soldering the conductor 23a of the core wire 23 of the shielded cable 2 to the connecting portion 16b of the pin contact 16, the net 32 previously passed through the shield cable 2 moves to the shell 31 side while surrounding the core wire 23. Be done. As a result, one end of the net 32 is covered on the outer periphery of the rear end of the shell 31 so as to overlap the convex portion 31a, and the other end is radially narrowed to cover the outer cover 21 and the braid 22. Next, after the heat-shrinkable tube 33 is moved so as to cover the entire net portion 32, it is heated and deformed by a heating tool such as a hot gun as shown in FIG. Due to the contraction pressure of the heat-shrinkable tube 33 due to this heating operation, one end side of the net 32 is pressed against the outer periphery of the rear end of the shell 31 and engaged with the convex portion 31a to be fixed. The other end of the net 32 is fixed by pressure to the jacket 21 and the braid 22 of the shielded cable 2. In the connector 3 thus connected to the shielded cable 2, the core wire 23 of the shielded cable 2 is surrounded by the net 32, and the braid 22 and the shell 31 are electrically connected via the net portion 32. As a result, a shield effect can be obtained.

[Effect of device]

 As is apparent from the above description, this invention covers the shell and the connecting portion of the shielded cable with a metal net, further covers the net with a heat-shrinkable tube, and heat-shrinks the tube to heat the net and the shield. It is fixed to the cable. For this reason, the electrical connection between the shell and the braid of the shielded cable is made through the net without using an endbell having a screw or a clamp as in the conventional example, so the connector can be made smaller and lighter. Can be achieved. Also, when assembling the connector, the net is easily formed to fit the outer peripheral surface of the shielded cable and contacts the braid.Therefore, the braid is folded back on the jacket and clamped to the end bell and the clamp metal fitting as in the past. It is possible to obtain a shielded cable connector that does not need to be brought into contact with the shield cable and improves the work of connecting shielded cables.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a connector according to the present invention is attached to a cable.

FIG. 2 is a perspective view illustrating a step of attaching a connector to a cable.

FIG. 3A is a cross-sectional view showing a conventional connector to which a cable is attached, and FIG. 3B is a view taken along the line AA in FIG.

FIG. 4 is an explanatory diagram showing a cable end treatment process.

[Explanation of symbols]

 1,3 Shielded cable connector 12 Insulator assembly 2 Shielded cable 21 Outer sheath 22 Braid 23 Core wire 31 Shell 32 Net 33 Heat shrink tube

Claims (1)

[Scope of utility model registration request] 1. A shielded cable connector in which a core wire is connected to a shielded cable that is sequentially covered with a braid and an outer jacket, and is inserted and fixed in a predetermined position in the shell while holding a metal shell and a contact. The insulator assembly, the core wire, and the shield cable in which the core wire and the braid are terminated so that the core wire is connected to the contact, the core wire of the shield cable is surrounded, one end is the shell, and the other end side is the braid of the cable. And a cylindrical metallic net covered on the outer cover, and a heat-shrinkable tube covering the net, the net is fixed to the shell and the cable by shrinkage pressure by heating the heat-shrinkable tube, the shell and A shielded cable connector characterized by being electrically connected to a cable braid.