JPH0152867B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coaxial cable connection section provided for connecting a coaxial cable in an antenna or various types of communal reception equipment.

The object is to provide a coaxial cable connecting part that can connect coaxial cables with good workability, can be made small in size, and can also improve the reliability of the connection.

The drawings showing the embodiments of the present application will be described below. In FIG. 1 showing a well-known antenna, 1 is a mast, 2 is an arm fixed to the mast 1, a member fixed to the arm 2, 3 is a radiator,
It consists of a feeding box 4 and a radiating element 5. 6 is a reflector, and 7 is a waveguide.

Next, the power supply box 4 will be explained in detail based on FIG. 8 is the power supply box body, which is made of synthetic resin. Reference numeral 9 denotes a radiating element fixing part provided on the power feeding box main body 8, into which the base of the radiating element 5 is inserted, and the base is fixed with a stopper 9a. 10 is a coaxial cable inlet.

Next, the coaxial cable connector 11 shown in detail in FIGS. 2 and 3 and subsequent figures will be explained. This connector 11 has a coaxial cable connector main body 12 and a holding piece 24. In the main body 12, 1
2a is a base body formed integrally with the box body 8. Reference numeral 13 denotes a concave portion for retaining the external conductor, the surface of which serves as an external conductor receiving surface, and an external conductor connecting piece 14 made of a conductive material is provided therein. Reference numeral 15 denotes a connection terminal formed integrally with the external conductor connection piece 14, to which, as is well known, a circuit element housed within the box body 8 is connected. Next, reference numeral 16 denotes a recess, the surface of which serves as a center conductor receiving surface, and a center conductor connection piece 18 is provided therein. The center conductor connecting piece 18 is inserted into the slit 16a in the direction of arrow A and overlapped on the receiving piece 17. It is also made of a conductive material. Reference numeral 19 denotes a connection terminal integrally formed with the center conductor connection piece 18, to which a circuit element housed within the box body 8 is connected, as is well known. A connection piece positioning piece 20 is provided for positioning the center conductor connection piece 18 in the recess 16. 21 indicates a notch for placing the center conductor. 22 indicates a screw hole. Next, presser piece 24
is made of synthetic resin material and has slight elasticity. In this holding piece 24, 25 indicates an external conductor holding piece. Reference numeral 26 denotes a center conductor holding piece, which is formed in a size that can be fitted into the recess 16. Reference numeral 27 denotes a guide portion, which is formed in a V-shape when viewed from above. 28 is a projecting piece, and 29 is a through hole, which is formed into a long hole as shown in FIG. Next, 30 is a fixing screw exemplified as a tightening tool, which passes through the through hole 29 and is screwed into the screw 22. 31
is a compression spring, which is interposed between the coaxial cable connector main body 12 and the holding piece 24. Next, 32 is a coaxial cable, which is composed of an outer conductor 33, a center conductor 34, and an insulator 35, as is well known.

In the case of the above structure, the coaxial cable 32 is first terminal-treated as shown in FIG. Insert the coaxial cable 32 in this state into the coaxial cable inlet 10, and as shown in FIG.
5 is inserted between the main body 12 and the holding piece 24 so that it comes into contact with the receiving piece 17.

Next, as the fixing screw 30 is tightened, the presser piece 24
moves toward the main body 12, and the coaxial cable 32 is pushed toward the main body 12. When the outer conductor 33 of the cable 32 comes into contact with the connection piece 14, as shown in FIG. It tilts in the direction of arrow B around . As a result, the bent portion 26a (the valley portion of the V-shaped guide portion 27) in the holding piece 26 bends the center conductor 34 in the direction of arrow C from the center axis of the outer conductor. When the fixing screw 30 is further tightened,
The tightened state is as shown in FIG. In this state, the outer conductor 33 is attached to the outer conductor holding piece 25.
The external conductor 33 and the external conductor connecting piece 14 are sandwiched between the external conductor 33 and the external conductor connecting piece 14, and are mechanically fixed, and the external conductor 33 and the external conductor connecting piece 14 are in a good electrical connection state. At the same time, the center conductor 34 is sandwiched between the center conductor holding piece 26 and the center conductor connection piece 18 and is mechanically fixed, and the center conductor 34 and the center conductor connection piece 18 are in a good electrical connection state. .

In this case, the distance between the lower surface 29a of the through hole 29 and the lower surface 26b of the center conductor holding piece 26 is such that the distance between the lower surface 29a of the through hole 29 and the lower surface 26b of the center conductor holding piece 26 is such that the surface 30a located on the lower side of the circumferential surface of the fixing screw 30 is located on the lower side of the circumferential surface of the center conductor 34. Since the center conductor holding piece 26 is slightly shorter than the distance between the center conductor holding piece 26 and the holding surface 34a, the center conductor holding piece 26 bends slightly upward in the tightened state, as shown in FIG. Therefore, the center conductor 34 is pushed back against the center conductor presser piece 2 due to the elasticity of the presser piece 26 trying to return to its original state.
6 and the center conductor connection piece 18, and the center conductor connection piece 18 is firmly sandwiched therebetween with a large force.

Further, in the process of performing the connection work as described above, even if the center conductor 34 is displaced from the pressing bending portion 26a, as the pressing piece 24 moves in the direction of arrow B, the V-shaped guide portion 27 As a result, the center conductor 34 is guided toward the pressing portion 26a. A suitable mechanical fixation as well as electrical connection as described above is thus achieved.

Next, FIG. 9 shows a comparison in size between a radiator having the above-described configuration and a radiator having a conventional configuration. In the above configuration, since the coaxial cable connector 11 is configured as described above, the height dimension H ₁ of the connector 11 is as shown in FIG. 9A.
is small, so the height _H2 of the power supply box 4 only needs to be small. Case 3 for packing this
The height dimension H ₃ of 6 may be extremely small compared to the case 41 for packaging the radiator equipped with the conventional coaxial cable connector 40 shown in FIG. 9B.

Next, FIGS. 10 to 12 showing different embodiments of the present application will be described. In this example, the presser piece 24
This figure shows an example in which the shape of the center conductor holding piece 26e in e is made different from that described above. In this example, the lower surface 26be of the center conductor holding piece 26e is configured to be inclined as shown in the figure.

In the case of such a structure, first, as in the case of the above structure, the coaxial cable 32e is inserted between the main body 12e and the holding piece 24e as shown in FIG. Next, as the fixing screw 30e is tightened, the center conductor 34e becomes the 11th
Bend as shown. As the fixing screw 30e is further tightened, the holding piece 24e will slide upward slightly, but eventually the lower surface 29ae of the through hole will come into contact with the fixing screw 30ae as shown in FIG.
The presser piece 24e is prevented from moving upward. If you further tighten the fixing screw 30e,
Since the holding piece 24e moves toward the main body 12e, the lower surface 26be of the center conductor holding piece is sloped.
As a result, as shown in FIG. 12, the center conductor 34e is pressed against the center conductor connection piece 18e. In this way, the center conductor 34e is mechanically fixed between the center conductor holding piece 26e and the center conductor connection piece 18e, and at the same time, the center conductor 34e and the center conductor connection piece 18e are in a good electrical connection state. Become. It should be noted that the same reference numerals as those in the previous figure are appended with an alphanumeric letter "e" for parts that are functionally the same or equivalent to those in the previous figure, and redundant explanations are omitted. (Also, in the following figure, the same idea is given by adding an alphanumeric character "f" and redundant explanation is omitted.) Next, FIG. This figure shows an example in which the coaxial cable connector 11f having the above-described structure is used in a coaxial cable connector of an amplifier, mixer, etc.). Note that 37 is a case, and 38 is a circuit board, which is fixed to the case 37 with a set screw 39.

As described above, in this invention, since the outer conductor holding piece 25 and the center conductor holding piece 26 are integrated, when connecting the coaxial cable 32, simply insert the end of the cable and tighten the tightening tool. This has the effect of simultaneously tightening and fixing the outer conductor and the center conductor with good workability.

Moreover, in the connected state, the center conductor 34
is connected in a bent state with respect to the central axis of the outer conductor 33, which has the advantage that the length in the insertion direction can be made extremely small with respect to the connecting portion of the central conductor 34. This has the practical effect of making the case smaller as shown in FIG. 9A, and reducing the area occupied within the case as shown in FIG. 13.

Furthermore, even if the dimension in the above direction regarding the connection of the center conductor is extremely small, since the bent center conductor is sandwiched as described above, there is a length for connection in the direction of the bent portion of the center conductor. This has the effect of making it sufficiently long and achieving good electrical continuity.

[Brief explanation of drawings]

The drawings show an embodiment of the present application. Fig. 1 is a perspective view of the antenna, Fig. 2 is an exploded perspective view of the coaxial cable connector with the cover of the power feeding section removed, and Fig. 3 is the coaxial cable connection. Perspective view of the tool, 4th
The figure is a vertical cross-sectional perspective view, and Figure 5 is a front view of the holding piece.
6 to 8 are partial cross-sectional views showing the process of fixing the coaxial cable, FIG. 9 is a schematic diagram to show a comparison of shapes, and FIG. 6 to 8, and FIG. 13 is a perspective view showing an example of a different usage location. 25... Outer conductor holding piece, 26... Center conductor holding piece, 33... Outer conductor, 34... Center conductor.

Claims (1)

[Claims] 1 Consists of a receiving surface on which the end of the coaxial cable can be placed along, a holding piece facing the receiving surface, and a tightening device capable of moving the holding piece close to the receiving surface. Moreover, the above-mentioned receiving surface consists of an outer conductor receiving surface and a center conductor receiving surface, which are arranged so that the outer conductor at the end of the coaxial cable and the center conductor on the tip side of the coaxial cable are aligned, respectively. It consists of an outer conductor holding piece that faces the conductor receiving surface, and a center conductor holding piece that is integrally constructed with the outer conductor holding piece and faces the center conductor receiving surface, and the receiving surface and the holding piece A coaxial cable connection part in which the outer conductor and center conductor of the terminal are respectively tightened to the corresponding receiving surface by the corresponding holding pieces by inserting the terminal of the coaxial cable between the terminals and tightening the tightening tool. In the above, the center conductor receiving surface is bent toward the side opposite to the holding piece with respect to the outer conductor receiving surface, and the center conductor holding piece is bent with respect to the outer conductor receiving surface to the side opposite to the side of the holding piece. When tightening the outer conductor by moving the outer conductor holding piece toward the outer conductor receiving surface in a state where the 1. A coaxial cable connecting portion, characterized in that the coaxial cable connection portion is bent to the side and protrudes toward the center conductor receiving surface so that the center conductor can be tightened to the center conductor receiving surface.