JPH0124968Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an improvement of an antenna plug connection device used in a portal type coaxial antenna such as a personal radio antenna.

[Conventional technology]

2. Description of the Related Art Conventionally, a plug connection device shown in FIG. 1 has been known as a plug connection device used for a coaxial antenna. 1st
In the figure, reference numeral 1 is a ground pipe of a coaxial rod antenna, and an insulating tube 2 made of synthetic resin having a flange 2a is fitted and fixed to the base end of this pipe 1, and a core wire portion connected to the antenna. 3 is inserted into the insulating tube 2 and extends into the connector body 4, and the core wire 3b protrudes from the insulator 3a of the core wire portion 3.
is connected to the (+) side of the connector body 4.
Further, a collar 8 is fitted onto the core wire 3b between the insulator 3a and the bottom 4a of the connector body 4 to position the core wire 3b.

On the other hand, a tightening ring screw 5, which is previously fitted to the outer circumference of the earth pipe 1, is screwed onto the inner periphery of the tip of the connector body 4, thereby connecting the earth pipe 1 to the (-) side. Then, the earth pipe 1 is fixed to the connector main body 4 by tightening the flange 2a of the insulating tube 2 with the tightening ring screw 5. In addition, in FIG. 1, reference numeral 6 denotes a connecting ring screw which is rotatably fitted to the outer periphery of the proximal end of the connector body 4 while being restricted in the axial direction, and 7 denotes a bottom 4 of the connector body 4.
It is an insulating material that is fitted onto the core wire 3b and insulates the core wire 3b.

[The problem that the idea aims to solve]

However, in the conventional plug connection device configured as described above, the flange 2a of the synthetic resin insulating tube 2 is tightened and deformed by the tightening ring screw 5, which weakens the fixation between the antenna and the connector. , the antenna may wobble, or its position may be misaligned, resulting in poor sensitivity. In addition, since the insulating tube 2 has a flange 2a, it is necessary to assemble the tightening ring screw 5 into the ground pipe 1 of the antenna before fixing the insulating tube 2, which has the disadvantage of poor assembly workability. It is especially difficult to assemble an antenna that has a large outer diameter section on the tip side of the ground pipe.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an antenna plug connection device that can securely and stably fix an antenna and a connector, and has good assembly workability, by eliminating the drawbacks of the conventional devices described above.

[Means to solve the problem]

In order to achieve this purpose, the antenna plug connection device according to the present invention is an antenna in which the core wire is inserted and supported in the ground pipe through an insulating tube, and an annular recess is provided on the outer periphery of the base end of the ground pipe. At the same time, an insulating tube is caulked and fixed in the ground pipe, and a metal ring with a cutout formed at one location in the circumferential direction is fitted into the annular recess, and the top plate side that can reduce the diameter of this ring has a small diameter. Fit a ring retainer tube with a tapered surface on the inner periphery to the earth pipe, screw the tightening ring screw fitted into the earth pipe into the connector body, and tighten the ring retainer tube.
The feature is that the earth pipe is sandwiched between a metal ring whose diameter is reduced.

[Effect]

With the above configuration, the earth pipe can be easily assembled to the connector, and the connection can be performed reliably.

〔Example〕

Below, Figures 2 to 4 will be explained for one embodiment of the present invention.
This will be explained with reference to the figures.

In FIG. 2, reference numeral 11 denotes an unbalanced antenna for personal radio, and a plug or connector 12 is fixedly connected to this antenna 11. In other words, as shown in FIG.
An insulating cylinder 14 made of synthetic resin is fitted to the base end of the earth pipe 13, which is the outer pipe of the earth pipe 13, and the earth pipe 13 is drawn to form annular recesses 13a at two locations on its outer circumference. An insulating tube 14 is fixed within the pipe 11, and a base end portion of the insulating tube 14 protrudes from the base end of the earth pipe 13. Further, as shown in FIG. 4, an elastic metal ring 15 having a cutout 15a at one location in the circumferential direction is fitted into one of the plurality (two in this embodiment) of annular recesses 13a of the earth pipe 13. The ground pipe 13 is fitted with a metal ring holding cylinder 16 located on the distal side of the metal ring 15 and a tightening ring screw 17 located further on the distal side.
The ring presser cylinder 16 has a tapered surface 16 on the inner periphery of the base end side of the top plate part 16a, which has a smaller diameter on the side of the top plate part 16a.
b is formed. Then, by screwing the tightening ring screw 17 onto the inner circumferential surface of the tip end of the connector body 18 of the connector 12, the ring presser cylinder 16 is pressed and tightened to the right in the figure, and the metal ring 15 is thereby tightened. The ground pipe 16 is fitted and supported by the tapered surface 16b of the ground pipe 16, and is pressed in the diameter reduction direction, thereby tightening the outer circumferential surface of the annular recess 13a of the earth pipe 13.

Further, the base end surface of the insulating tube 14 protruding from the base end of the earth pipe 13 is attached to the bottom 18a of the connector body 18 through a locking ring 19 screwed to the base screw on the (+) side. It is brought into contact with the insulating material 20. An annular recess is located on the outer periphery of the locking ring 19 and on the inner periphery of the insulating cylinder 14, and faces the annular recess 13a of the earth pipe 13, so that the outer cylinder base of the antenna section (core wire section) is fixed. , a multistage inner cylinder is extendably provided on this outer cylinder. The connector body 18 and the connector 12 having the tightening ring screw 17 are substantially the same as the conventional connector shown in FIG. The ground pipe 11 is connected to the (+) side of the
The connection to the sides is also similar to the conventional one.

The plug connection device of the embodiment configured as described above uses a metal ring 15 having a cutoff portion 15a at one location in the circumferential direction, so by pulling this in the circumferential direction, the inner diameter can be increased. Therefore, it can be easily assembled into the annular recess 13a of the earth pipe 13, and after completing the assembly of the antenna 11,
Fit the tightening ring screw 17 and ring presser tube 16 of the connector 12 into the earth pipe 13, and then fit the metal ring 15, and use these to tighten the connector body 1.
Since the earth pipe 13 can be fixed to the connector body 8, the assembly work is simpler than the conventional one mentioned above, and even if the antenna has a large outer diameter part on the tip side of the earth pipe, it can be fixed to the connector body without any problem. can.

Further, in this embodiment, by tightening the tightening ring screw 17, the tapered surface 1 on the inner circumference of the ring holding cylinder 16
Since the diameter of the metal ring 15 is reduced at 6b, the ring 15 is reliably prevented from coming off, and the antenna 1
1 and the connector 12 can be securely and stably fixed.

[Effect of idea]

As explained above, according to the present invention, an annular recess is provided on the outer periphery of the earth pipe, an insulating cylinder is caulked and fixed in the pipe, and a tightening ring screw and a ring holding cylinder are fitted into the earth pipe, and the annular recess is Fit an elastic metal ring with a cut-off part to the connector body, press the ring holding cylinder by screwing the tightening ring screw into the connector body, and use its taper to reduce the diameter of the metal ring and clamp the earth pipe. This makes it easy to assemble, and together with the tapered surface formed on the inner periphery where the metal ring of the ring holding tube is fitted and supported, the antenna and connector can be securely and stably fixed, and the antenna The effect is that the sensitivity is good.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of the main parts of a conventional antenna plug connection device, FIG. 2 is a schematic exploded perspective view of a plug connection device according to an embodiment of the present invention, and FIG. 3 is the main parts of the same. FIG. 4 is a perspective view of the metal ring. 1...Earth pipe, 2...Insulation cylinder, 2a...
Flange part, 3... Core wire part, 3a... Insulator, 3b...
Core wire, 4... Connector body, 4a... Bottom, 5...
Tightening ring screw, 6... Connection ring screw, 7...
Insulating material, 8...Color, 11...Antenna, 12
...Connector, 13...Earth pipe, 13a...
...Annular recess, 14...Insulating tube, 15...Metal ring, 15a...Separation part, 16...Ring holding tube, 16a...Top plate, 16b...Tapered surface, 17
... Tightening ring screw, 18 ... Connector body, 1
8a... Bottom, 19... Locking ring, 20... Insulating material.

Claims (1)

[Scope of Claim for Utility Model Registration] In an antenna in which the core wire is inserted and supported in an earth pipe via an insulating tube, an annular recess is provided on the outer periphery of the base end of the earth pipe, and the insulating tube is fixed in the earth pipe by caulking. and a ring in which a metal ring having a cutout at one location in the circumferential direction is fitted into the annular recess, and a tapered surface is formed on the inner periphery so that the diameter of the ring is reduced on the top plate side. The feature is that the presser tube is fitted to the earth pipe, the tightening ring screw fitted on the earth pipe is screwed to the connector body, the ring presser tube is tightened, and the earth pipe is clamped through the diameter-reducing metal ring. Antenna plug connection device.