JPS62258Y2 - - Google Patents

Description

[Detailed description of the invention] This invention consists of a plurality of pipes with different diameters, and the pipes from the smallest diameter pipe to the largest diameter pipe are stored in a nested manner in order. The present invention relates to a rod antenna device comprising a telescoping rod antenna and a cylindrical case housing the rod antenna in a contracted state.

In radio receivers that receive multiple different frequency bands, or devices that combine an FM radio receiver and a transceiver, the length of the antenna varies depending on the band to be received. Furthermore, if the radio waves to be received are horizontally polarized, it is necessary to keep the antenna horizontal. Furthermore, when receiving vertically polarized radio waves, it is necessary to vertically position the antenna. For example, in a device that combines an FM radio receiver and a transceiver, when receiving FM broadcasts, the antenna needs to be shortened and horizontal. Furthermore, when communicating using the citizen band, it is necessary to lengthen the antenna and hold it vertically. Therefore, it would be better to provide dedicated antennas for each, but this would be disadvantageous in terms of cost and also undesirable in terms of usability.

The present invention was developed in view of these problems, and consists of a plurality of pipes with different diameters, and the pipes from the smallest diameter pipe to the largest diameter pipe among these plurality pipes are sequentially arranged. In a rod antenna device comprising a telescoping rod antenna configured to be housed in a nested manner and a cylindrical case housing the rod antenna in a contracted state, an intermediate portion of the plurality of pipes is provided. A bending mechanism is provided between the lower end of a first pipe having a diameter of The first pipe is configured so that it can be bent with respect to the second pipe even though the first pipe can be housed in the second pipe, and the upper end of the cylindrical case A fitting ring portion that can be fitted to the second pipe is provided at the upper end portion of the second pipe, and the fitting ring portion is fitted to the upper end portion of the cylindrical case to fit the first pipe and the first pipe. When only the pipe on the tip side of the pipe is extended, the rod antenna has a length suitable for receiving the first frequency band,
The rod antenna device is characterized in that the fitting of the fitting ring part is released so that the plurality of pipes have a length suitable for receiving radio waves in a second frequency band. be. Therefore, the present invention provides a rod antenna device that is compact, easy to operate, and hard to damage, which can receive a plurality of radio waves with different frequency bands and polarization directions using a single rod antenna. can do.

The present invention will be explained below with reference to examples. In this embodiment, the present invention is applied to a transceiver with a radio, and as shown in FIG. installed. Inside the antenna case 2, a rod antenna 4 consisting of a plurality of pipes, for example nine pipes, is accommodated in an expandable and retractable manner. As shown in FIG. 2, a mounting block 6 is fixed to the lower end of the largest diameter pipe 5, and this block 6 is connected to the antenna case 2 via bolts 7. By housing all other pipes within this maximum diameter pipe 5, the antenna 4 is held in a contracted state.

Further, this rod antenna 4 is provided with a bending mechanism 8 in the pipe in the middle thereof. Regarding the bending mechanism 8, the bending mechanism 8 is composed of a pair of upper and lower connecting blocks 9 and 10. The upper block 9 is crimped and fixed to the lower end of the sixth pipe 11, for example. Then, the connecting piece 12 provided on the block 9 is connected to the third connecting piece 12.
As shown in the figure, it is inserted into a slit 13 formed in the lower block 10 and is bently connected by a pin 14.
Note that the lower block 10 fits into the inner peripheral surface of the fifth pipe 15, for example. Furthermore, this bending mechanism 8 is provided with a click mechanism. That is, three semicircular recesses 16, 17, and 18 are provided at the lower end of the connecting piece 12, and a ball 19 is arranged in the lower block 10 opposite to these recesses 16, 17, and 18. ing. The ball 19 is placed in a small hole 20 communicating with the slit 13 and is pushed upward by a coil spring 21 inserted into the small hole 20. Therefore, this ball 20 is adapted to engage with any one of the recesses 16, 17, and 18. Further, a ring 22 is fixedly attached to the upper end of the fifth pipe 15. This ring 22 has an outer diameter equal to the inner diameter of the case 2, and is provided with a flange 23.

Next, a method of using the rod antenna 4 having the above configuration will be explained.

First, when using the rod antenna as a transceiver, that is, when receiving citizen band radio waves with this rod antenna, remove the ring 22 from the upper end of the case 2, pull out the entire pipe constituting the rod antenna 4 from the antenna case 2, and extend it. This antenna 4 then has a length approximately suitable for receiving citizen band radio waves. Furthermore, since this radio wave is vertically polarized, the rod antenna 4 may be used in a vertical position.

Next, when receiving FM broadcasting, only the portion of the rod antenna 4 above the bending mechanism 8, that is, the portion after the sixth pipe 11 is stretched. Note 5
Without stretching the pipe 15, the ring 22 fixed to the upper end of the pipe 15 is fitted into the upper part of the antenna case 2, as shown by the imaginary line in FIG. In order to ensure the above-mentioned fitting, the ring 22 may be locked to the antenna case 2 by an appropriate locking means not shown. As a result, the fifth pipe 15 is coupled to the upper end of the antenna case 2, and the base of the bending mechanism 8 is prevented from wobbling. Furthermore, the sixth pipe 11 is bent around the pin 14 so that the recess 16 or 18 of the block 9 and the ball 19 engage with each other. As a result, the extended portion of the rod antenna 4 after the sixth pipe 11 becomes almost horizontal, and it becomes possible to receive horizontally polarized FM broadcast radio waves.

When this rod antenna 4 is not used,
All the pipes may be housed in the antenna case 2 as shown in FIG. The lower block 10 constituting the bending mechanism 8 is fitted inside the fifth pipe 15, and therefore the sixth pipe 1
When you press 1 downward, this pipe 11 and block 1
0 means that it is stored in the fifth pipe 15. In other words, the bending mechanism 8 is the fifth pipe 1
It will be stored within 5.

Although the present invention has been described above with reference to embodiments, it is understood that the present invention is not limited to the above-mentioned embodiments, and that various modifications can be made based on the technical idea of the present invention.

For example, the antenna of the above embodiment is designed to receive citizen band radio waves and FM broadcast radio waves, but it can also be used as an antenna designed to receive VHF radio waves and shortwave radio waves. be.

As described above, the present invention provides a fitting ring part that can be fitted to the upper end of the cylindrical case at the upper end of the second pipe, and a fitting ring part that can be fitted to the upper end of the cylindrical case. When only the first pipe and the pipe on the distal end side of the first pipe are extended, the length becomes suitable for the rod antenna to receive the first frequency band, and the fitting ring part is extended. When the above-mentioned fitting is released by removing the upper end of the cylindrical case and the entire plurality of pipes are extended, the rod antenna has a length suitable for receiving radio waves in the second frequency band. Therefore, a single rod antenna can receive radio waves in multiple different frequency bands.

Also, there is a fold between the lower end of a first pipe having an intermediate diameter among the plurality of pipes and the upper end of a second pipe adjacent to the first pipe and in which the first pipe is housed. Since the bending mechanism is provided, even if the polarization directions of radio waves in a plurality of frequency bands to be received are different from each other, the direction of the rod antenna can be freely changed accordingly.

Furthermore, the plurality of pipes are configured so that the smallest to largest diameter pipes are stored in a nested manner, and even though the first pipe can be bent relative to the second pipe, the first pipe is stored within the second pipe, so that the rod antenna can be stored compactly.

Further, since the fitting ring provided at the upper end of the second pipe is fitted to the upper end of the cylindrical case, only the first pipe and the pipe on the distal end side of the first pipe are connected. When attempting to extend the rod antenna, the second pipe and the pipe on the proximal end side of the second pipe are dragged by the first pipe and do not come out of the cylindrical case. The length suitable for receiving one frequency band can be set instantly and accurately, and the operability is good.

Also, when receiving the first frequency band, the second
Since the fitting ring provided at the upper end of the second pipe is fitted into the upper end of the cylindrical case, in this state, the second pipe sits well on the cylindrical case, and Even if the attitude of the first pipe with respect to the second pipe is repeatedly adjusted, there is no fear that the second pipe will be fatigued and damaged.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a transceiver with radio showing an embodiment of the present invention, Fig. 2 is a vertical sectional view of the rod antenna of this transceiver with radio, and Fig. 3 is an exploded perspective view of the main parts of the bending mechanism. be. In addition, in the symbols used in the drawings, 4...rod antenna, 8...bending mechanism, 11...6th pipe (first pipe), 15...5th pipe (second pipe), 22... ...A ring (fitting ring part).

Claims (1)

[Scope of utility model registration request] A telescoping rod antenna consisting of a plurality of pipes having sequentially different diameters and configured such that the pipes from the smallest diameter pipe to the largest diameter pipe among the plurality of pipes are sequentially nested and housed; In a rod antenna device each comprising a cylindrical case capable of housing the rod antenna in a contracted state, a lower end portion of a first pipe having an intermediate diameter among the plurality of pipes; A bending mechanism is provided between the upper end of an adjacent second pipe in which the first pipe is housed, whereby the first pipe is folded into the second pipe.
Although it can be stored in the second pipe,
The first pipe is configured to be bendable with respect to the pipe, and a fitting ring portion that can be fitted to the upper end of the cylindrical case is provided at the upper end of the second pipe, When the ring part is fitted to the upper end of the cylindrical case and only the first pipe and the pipes on the distal end side of the first pipe are extended, the rod antenna receives the first frequency band. When the length of the rod antenna is suitable for receiving radio waves in the second frequency band, when the fitting of the fitting ring part is released and the plurality of pipes are extended as a whole, the rod antenna has a length suitable for receiving radio waves in the second frequency band. A rod antenna device characterized in that the length of the rod antenna is adjusted to a certain length.