JPH0210649Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a telescoping rod antenna used in transceivers and the like.

[Conventional technology]

By the way, in this type of conventional telescopic rod antenna, as shown in FIGS. 1 and 2, a decorative bead 2 is fitted and fixed to the upper end of the tip rod 1 with the smallest diameter, and a slide spring 3 is fitted to the lower end. The lower end portion is fixed by caulking, and the lower end surface 1a of the tip rod 1 is located on substantially the same horizontal plane as the lower end of the slide spring 3. Then, antenna pipes 4, 5, and 6 whose diameters become larger sequentially are fitted concentrically to the outside of the tip rod 1, and the lower ends of slide springs 7 and 8 are caulked and fixed to the base ends of the antenna pipes 4 and 5. Protrusions 7a and 8a for caulking protrude toward the center from the inner peripheral surfaces of the antenna pipes 4 and 5, and a base metal fitting 9 is fitted to the base end of the antenna pipe 6 having the maximum diameter. Fixed.

The slide springs 3, 7, and 8 are slidably pressed against the outer antenna pipes 4, 5, and 6, respectively, so that the antenna element is configured to be expandable and retractable.
When reduced, it becomes bamboo-shaped as shown in FIG. 1, which is the same configuration as the conventional antenna of this type.

[The problem that the idea attempts to solve]

However, in recent years, transceivers have become smaller and lighter, but the built-in batteries still add considerable weight, making the transceiver as a whole quite heavy. On the other hand, transceivers are required to remain intact even if dropped from a desk height of 75cm to 1m at any angle.

When this transceiver falls, if the telescopic rod antenna attached to it is in a downward position, an excessive impact load will be applied to the top of the ornamental bead 2 attached to the tip rod 1, and this will cause the tip rod 1 to be attached to the antenna pipe 4 of the next stage. The inner rod or pipe may damage the protrusion of the outer slide spring, such as by hitting the protrusion 7a for caulking and fixing the slide spring 7 that protrudes from the inner peripheral surface of the slide spring 7 toward the center, and the protrusion 7a is cut. There were problems with the telescopic rod antenna being damaged, such as when it was bent or deformed, causing it to fall off.

[Means to solve the problem]

The object of the present invention is to solve the above-mentioned problems and provide a telescopic rod antenna with a simple structure that is difficult to break even when an excessive impact load is applied to the ornamental ball with the antenna element in a reduced state. We have the following means to solve the problem. That is, antenna pipes of increasing diameter are fitted concentrically to the outside of the tip rod, which has a decorative bead at the upper end and a slide spring at the lower end, and the slide springs are caulked and fixed to the base ends of these pipes. , these caulking protrusions protrude from the inner peripheral surface of each pipe toward the center, and a base metal fitting is fitted and fixed to the antenna base end with the largest diameter, and the antenna pipe on the outer peripheral side is attached to each slide spring. In the telescopic rod antenna, which is slidably press-fitted, there is provided on the base metal fitting, the upper end of which faces above the caulking protrusion of the slide spring of the innermost antenna pipe when the antenna element is at its lowest contraction. A protrusion is provided to abut and support the lower end of the tip rod.

Furthermore, in Japanese Utility Model Publication No. 29-14103, which is an example of the prior art, a shock prevention protrusion is provided close to the spring provided at the end of the internal antenna, so that when the internal antenna is pulled out, the shock prevents the spring from being damaged. An enlarged antenna that prevents damage is described, and Japanese Utility Model Publication No. 47-6352 describes an optional antenna pipe of a telescopic rod antenna in which antenna pipes of increasing diameter are fitted concentrically. A switch having a movable contact and a fixed contact is built into the antenna pipe, and an operating piece for operating the movable contact is provided on the adjacent antenna pipe, so that the switch is automatically opened and closed in connection with the operation of the antenna. However, an antenna with a built-in switch is described, and therefore, both of these have different issues and configurations from the present invention.

[Function] Since the present invention has the above-mentioned means, even if an excessive impact load is applied to the ornamental ball of the telescopic rod antenna and a large load is applied to the tip rod, the lower end of the rod will not collapse when the rod is at its maximum contraction. By being abutted and supported by the protrusions, the load does not act on the protrusions of the slide springs of the outer antenna pipes, thus preventing them from being damaged.
It is possible to provide a telescopic rod antenna with a long life.

〔Example〕

To describe an embodiment of the present invention, in the conventional telescopic rod antenna described above with reference to FIGS. 1 and 2, as shown in FIG.
An impermeable hole 9a is opened in the upper surface of the central portion of the holder, and this impermeable hole 9a extends downward in the axial direction. A spring pin 10 is provided in the impermeable hole 9a with a cut portion 10a at one location in the circumferential direction over the entire length in the axial direction.
The lower end of the protrusion is press-fitted into the spring pin 10, and the spring pin 10 projects vertically onto the base metal fitting 9, and the upper end of the spring pin 10 is connected to the antenna when the bamboo-shaped antenna element is at its minimum contraction. It faces upward from the projection 7a of the slide spring 7 of the pipe 4 and abuts and supports the lower end surface 1a of the tip rod 1.

The telescopic rod antenna of the embodiment configured as described above can be used in cases where an excessive impact load is applied to the decoration bead 2 in the direction of reducing the antenna element, such as when the antenna is attached to a transceiver and falls with the antenna facing downward. Even if a large load is applied to the tip rod 1 in the pushing direction, the lower end surface 1a of the tip rod 1 comes into contact with the upper end surface of the spring pin 10 to support the load, and the antenna pipe 4 of the next stage adjacent to the outside is supported. No force is applied to the protrusion 7a of the slide spring 7, and therefore no force is applied from the antenna pipe 4 to the protrusion 8a of the slide spring 8 of the antenna pipe 5 on the outside.

Therefore, even if an excessive impact load is applied to the tip rod 1 through the decorative beads 2 in the antenna element shrinking direction, this will cause the protrusions 7a, 8 of the slide springs 7, 8 to
Safety is ensured by preventing the antenna from being damaged or deformed by being transmitted to the antenna, such as the antenna being cut or deformed, the tip rod 1, the antenna pipes 4 and 5 falling off, and the slide springs 7 and 8 coming off. The antenna can be used for a long period of time.
The structure is also simple, since the impermeable hole 9a is made in the base metal fitting 9 and the spring pin 10 is press-fitted therein.

In the present invention, the tip rod 1 may be a bar or a pipe, the number of stages of the antenna pipe can be changed as appropriate, and a rod or pipe can be fitted into the hole of the base metal fitting 9 instead of the spring pin 10. The configuration and attachment means of the protrusion that abuts the tip rod 1, such as fixation, can be changed as appropriate. The present invention can also be applied to extendable rod antennas used for purposes other than transceivers.

[Effect of idea]

As explained above, according to the present invention, on the base metal fitting that is fitted and fixed to the base end of the maximum diameter antenna pipe of the conventional telescopic rod antenna,
A protrusion whose upper end faces above the caulking protrusion of the slide spring which is caulked and fixed to the base end of the innermost antenna pipe when the antenna element is most contracted, and which abuts and supports the lower end of the tip rod. Although it has a simple structure with a protruding body, even if an excessive impact load is applied to the tip rod in the direction of shrinking the antenna element through the decorative bead, the protruding body will support this load and the protruding body will be able to maintain its position adjacent to the outside. This load does not act on the protrusions of the slide springs of the next-stage antenna pipes, and as a result, the load is not transmitted to the protrusions of the slide springs of the antenna pipes on the outside. There is no chance that the tip rod or antenna pipe will fall off due to cutting or deformation, and therefore, the antenna can be prevented from being damaged or deformed, and a telescopic rod antenna that is highly safe and has a long life can be provided. This effect can be obtained.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a longitudinal cross-sectional view of the same essential part, and FIG. 3 is a partially cutaway side view showing how the protrusion is attached. 1... Tip rod, 1a... Lower end surface, 2... Decorative ball, 3... Slide spring, 4, 5, 6... Antenna pipe, 7, 8... Slide spring, 7a, 8
a... Protrusion, 9... Base metal fitting, 9a... Impermeable hole, 10... Spring pin (protrusion), 10a
...Cut section.

Claims (1)

[Claims for Utility Model Registration] Antenna pipes of increasing diameter are fitted concentrically to the outside of a tip rod having a decorative bead at the upper end and a slide spring at the lower end, and the base ends of these pipes are fitted concentrically. The slide springs are fixed by caulking, and the protrusions for caulking protrude from the inner peripheral surface of each pipe toward the center, and a base metal fitting is fitted and fixed to the base end of the antenna, which has the largest diameter, and each slide spring is fixed by caulking. In the telescopic rod antenna, in which the antenna pipe on the outer circumferential side is slidably pressed against the rod, there is provided on the base metal fitting, the upper end of which is used for caulking the slide spring of the innermost antenna pipe when the antenna element is at its most contracted. A telescoping rod antenna characterized in that a protrusion protrudes above the protrusion and abuts and supports the lower end of the tip rod.