JPS597188B2 - Coaxial cable connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coaxial cable connector used when connecting a coaxial cable to a printed circuit board or the like.

Coaxial cables have an inner conductor and an outer conductor.

Therefore, the connection work is considerably more difficult than that of ordinary single-conductor insulated wires. Conventionally, when connecting such a coaxial cable to a connector on a printed circuit board, the jacket and inner coating of the coaxial cable are peeled off to expose the inner and outer conductors, and each conductor is soldered to the terminal of the connector. It is common to take However, such methods are inefficient. In particular, when connecting a large number of coaxial cables or when connecting a coaxial ribbon cable formed by integrally molding a large number of coaxial cables into a ribbon shape, the connection work becomes extremely difficult. No general solution to this problem has been proposed at present, and only improvements to the connection method for coaxial ribbon cables with special structures and connector structures for the connection work have been proposed so far. do not have.

This prior art will be explained with reference to FIGS. 1 to 4. FIG. 1 is a cross-sectional view of a coaxial ribbon cable with a special structure.

3 is an integrally molded vinyl chloride jacket in which a plurality of coaxial cables are housed.

Each coaxial cable includes a single-wire inner conductor 4 covered with an inner sheath 2, a drain wire (outer conductor) 1 disposed outside the inner sheath 2, and a foil shield surrounding the drain wire 1 and the inner sheath 2. It consists of 5. FIG. 2 is an external view of a connector for connecting the above-mentioned coaxial ribbon cable, and this connector is provided with a cable connecting portion T on one side of the main body 6. As shown in FIG. The detailed structure of the cable connection part T is as shown in FIG. That is, the cable connection portion T is constructed by arranging a large number of connectors 9 having two U-shaped contacts 8 on the upper and lower surfaces of an insulating plate. For connection, first, the jacket 3 and internal coating 2 at one end of the coaxial ribbon cable are removed all at once using a special peeling device (not shown) to expose the internal conductor 4 and drain wire 1. Next, as shown in FIG.
Each internal conductor 2 is arranged so as to face the shape contact 8, and the drain wire 1 is arranged so as to face the U shape contact 8 of the connector 9 on the lower surface side. Thereafter, all the internal conductors 2 and all the drain wires 1 are crimped to a predetermined contactor 8 at once by a known batch crimping technique. The conventional technology mentioned above is
There is an advantage that stripping and connection of coaxial ribbon cables can be performed at once.

However, applications are limited to special coaxial ribbon cables with drain wires, special equipment is required to strip the coaxial cable, and it is difficult to connect other than at the ends of the coaxial cable. This is a problem. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a connector for coaxial cables that can be easily connected at either the end of the cable or other locations without stripping the coating of a general coaxial cable (including coaxial ribbon cable). be.

The coaxial cable connector according to the present invention is characterized by having a rod-shaped contact for connecting the inner conductor of the coaxial cable, and a thin blade-shaped contact for connecting the outer conductor of the coaxial cable, and that the rod-shaped contact has a small number. Both have a structure in which a portion is covered with an insulating film.

The present invention will be specifically described below with reference to the accompanying drawings. First, the basic structure of the connector according to the present invention will be explained with reference to FIGS. 5a to 5c.

As shown in FIG. 5a, the connector of the present invention includes at least one rod-shaped contact 10 implanted on a connector main body block 14. As shown in FIG. 5b, this rod-shaped contact 10 penetrates the outer sheath 19 of the coaxial cable 11 and reaches the inner conductor 16VC. Rod-shaped contact 10
is at least partially covered with an insulating film to insulate it from the outer conductor 17 of the coaxial cable 11. In the illustrated example,
Almost the entire surface of the rod-shaped contact 10 is coated with an insulating film 13 except for its tip portion 12 (which contacts the internal conductor). The connector of the present invention further includes at least one thin blade-like contact for connecting the external conductor. In the illustrated example, this blade-like contact (indicated by number 18) has a tip end with two ends as shown in FIG. 5c.
It is formed into a substantially U-shape branching into book beams 20a and 20b. When this contactor 18 is press-fitted from above to below, the outer sheath 19 of the coaxial cable 11 is broken by the ends of the left and right beams 20a, 20b, and the outer conductor 17 is exposed and comes into contact with the beams 20a, 20b. Since inward pressure is applied to the coaxial cable 11 by the left and right beams 20a, 20b, good contact between the beams 20a, 20b and the outer conductor 17 is achieved. This pressure also acts on the internal conductor 16VC, and the internal conductor 16 and the rod-shaped contact 10
The degree of contact with the tip portion 12 is increased. The rod-shaped contact 1
0 may be a square bar, a solid or hollow round bar, or any other cross-sectional shape (as long as it is substantially rod-shaped so that it can easily penetrate the outer sheath 19). good. Further, the insulating film 13 may be formed in any manner as long as it does not prevent the contact between the rod-shaped contactor 10 and the inner conductor 16 of the coaxial cable 11 and can achieve insulation from the outer conductor 17.
Other examples of the rod-shaped contact 10 are shown in FIGS. 6A and 6B, and FIG.
In the one shown in , an insulating film 13 is formed on the part except for the middle part 12'', and in this case, the length of the contact 10 is determined so that the middle part 12' comes into contact with the internal conductor of the yoke cable. In the connector shown in FIG. 6b, the tip 12 of the contact 10 is sharpened into a needle point to facilitate penetration into the coaxial cable.A specific example of the connector according to the present invention is shown in FIG. show.

This embodiment is designed to be used for connecting the coaxial ribbon cable 26 as shown in the figure, and the main body block 14 has a large number of rod-shaped internal conductor contacts 10 as described above arranged at equal intervals. There is. The force half-lock 22 is provided with an external conductor contact 18 corresponding to each rod-shaped contact 10. These contacts 18 each have the structure described above, but are all integrally molded so as to extend from a common ground connector 23. Earth connector 23
Ground terminals 25 extending downward are formed at both ends. When connecting the coaxial ribbon cable 26, the force half locks 22 are installed on the main block 14 as shown in the figure, and the latch portions 2 provided at both ends of the main block 14 are
4 latches the ground terminal 25, thus holding both blocks 14 and 22 together.

When forming the penetration hole for the contact for the inner conductor of the connector before connecting the coaxial cable or coaxial ribbon cable,
Connection work becomes easier.

For example, in the case of a coaxial telephone cable, holes 27 may be formed in advance as shown in FIG. To make the hole 27, for example, a simple jig as shown in FIG. 9 can be used. That is, a coaxial ribbon cable or a single coaxial cable is held between the upper and lower plates 28a and 28b, and the punching needle 30 is inserted through the guide hole 29. By doing so, a hole reaching the inner conductor 16 can be easily formed as shown in FIG. 10a or BVC. Needless to say, if there is no problem in penetrating the inner conductor contact, the above-mentioned drilling operation may not be performed.

The connector of the present invention, as described above, does not require troublesome work such as peeling off the coating using special equipment or soldering the conductors one by one. can be easily connected. Moreover, it does not involve peeling off the coating to take out the inner conductor of the cable.
It can be connected at any position including the end of the cable.

[Brief explanation of the drawing]

Figures 1 to 4 are diagrams for explaining the prior art, and Figure 1 is a cross-sectional view of a special coaxial ribbon cable, and Figure 2 is a cross-sectional view of a special coaxial ribbon cable.
3 is a schematic perspective view of the cable connection part of the connector of FIG. 2, FIG. 4 is a schematic diagram showing the connection state between the cable of FIG. 1 and the connector of FIG. 2, Figures 5a to 5c are schematic diagrams showing the basic structure of the connector according to the present invention and the manner in which coaxial cables are connected, and Figures 6a and 6b are other views of the rod-shaped contacts for connecting internal conductors shown in Figure 5. FIG. 7 is a partially cutaway perspective view showing an embodiment of the connector according to the present invention, and FIG. 8 is an example of a coaxial telephone cable that has been preprocessed before being connected to the connector of the present invention. FIG. 9 is a sectional view showing an example of a jig for performing the above-mentioned preliminary processing, and FIGS. 10a and 10b are different sectional views of the coaxial cable after preliminary processing. DESCRIPTION OF SYMBOLS 10... Rod-shaped contact for internal conductor connection, 11... Coaxial cable, 13... Insulating film, 14... Main body block, 16... Internal conductor, 17... Outer conductor, 18...
・・Thin blade-shaped contacts for connecting external conductors, 20a, 20b・
...Blade-shaped beam, 22...Power half lock, 23.
...Earth connector, 24...Latch part, 25...Earth terminal, 26...Coaxial ribbon cable.

Claims (1)

[Claims] 1. A rod-shaped contact for connecting an internal conductor of a coaxial cable, and a thin blade-shaped contact for connecting an external conductor of a coaxial cable, and at least a part of the rod-shaped contact is covered with an insulating film. A coated coaxial cable connector. 2. The coaxial cable connector according to claim 1, wherein the thin blade-shaped contact has a tip branched into two blade-shaped beams.