JPS62262Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention provides an antenna device that can match any frequency when receiving or transmitting two different frequency bands.

Some conventional receivers are capable of receiving two or more different frequency bands, such as medium wave, short wave, and FM. In order to receive these multiple frequency bands, a single antenna is fixed to the receiver, and this antenna is shared so that it can receive any frequency band. In this case, the length of the shared antenna was determined by matching the wavelength of the FM frequency band. This is because medium waves and short waves have long wavelengths, so they can be received well even with short antenna lengths, but FM waves have short wavelengths, and
This is because the FM frequency band cannot be received well unless wavelengths are carefully considered and matched. In addition, although the wavelength used by the antenna used in transceivers is longer than the FM frequency band, it is shorter than the wavelength of medium waves and short waves, and because it also has a transmitting operation, it is difficult to match the wavelength of the transmitting and receiving frequencies. The antenna length is determined by considering the wavelength, otherwise the antenna will be inefficient.

In recent years, receivers have been developed that can receive multiple frequency bands such as medium waves, short waves, and FM, and have multiple functions that can also be used as transceivers. With this composite receiver,
In order to provide an antenna that sufficiently matches both the FM frequency band and the transceiver frequency band, two types of lengths are required: one that matches the FM wavelength and the other that matches the wavelength of the transceiver frequency. Different ones would have to be provided in a single receiver. This increases the volume of the receiver, making it inconvenient to carry, and also requiring the use of one of the antennas to extend or contract, which is cumbersome.

For this reason, as shown in FIG. 1, a single antenna device has been devised that can match wavelengths in different frequency bands. here,
Reference numeral 1 denotes a receiver having a transceiver function and having a microphone 2, a speaker 3, a frequency scale 4, a knob 5, etc., and an antenna device 6 that can be extended and contracted up and down is provided on the top surface of the receiver 1. The antenna device 6 is a so-called rod antenna in which a plurality of metal pipes with different diameters are inserted concentrically, and includes a first telescopic pole group 7, a second telescopic pole group 8, and a connection that connects the two so as to be rotatable and tiltable. It is composed of a tool 9. In this antenna device 6, when receiving FM, the first telescopic pole group 7 is pulled out from the receiver 1 and matched to the wavelength of the FM frequency band. When used as a transceiver, the second telescoping pole group 8 is also pulled out from the receiver 1 along with the first telescoping pole group 7 to lengthen the antenna length.
Match the wavelength of the transceiver frequency band. (Figure 1 shows the state in which it is used as a transceiver, when it is fully extended. Generally, the frequency band of a transceiver is lower than the frequency band of FM, and when used as a transceiver, the antenna length becomes longer.) Then, it receives FM. When doing so, connect the connector 9
protrudes from the upper surface of the receiver 1, and the first telescopic pole group 7 can be freely rotated and tilted. When used as a transceiver, the receiver 1 itself may be tilted in order to use the microphone 2, and the antenna device 6 is used in a straight-extended state. (However, if necessary, the lower end of the second telescopic pole group 8 can be rotated.
It is also possible to provide a tilting fitting that can be tilted. ) The first and second telescopic pole groups 7 and 8 as described above.
In the antenna device 6 which is connected to the antenna device 6, only the first telescopic pole group 7 is used to receive FM broadcasting. is regulated by the connector 9 and can be fixed at a predetermined position and angle. However, since the connector 9 is fixed to the smallest diameter pole of the second telescoping pole group 8, unless the smallest diameter pole is fixed by some means, the extended first telescoping pole group 7 will remain at a fixed position. It could not be fixed in place and would rotate on its own.

For this purpose, an L-shaped key-shaped slit is provided in the pole with the largest diameter in the second telescoping pole group 8, an engagement pin is planted on the outer periphery of the pole with the smallest diameter, and the engagement pin is engaged with the slit. Therefore, an antenna device has also been devised in which the pole with the smallest diameter in the second telescoping pole group 8 is fixed to prevent the connecting tool 9 from rotating freely. However, since the slit and engagement pin are exposed at the upper end of the second telescoping pole group 8, the appearance is poor and there is a risk that operating fingers may come into contact with the slit or engagement pin and cause damage. It was hot.

In view of the above-mentioned drawbacks, the present invention provides an antenna device in which the pole with the smallest diameter in the second telescopic pole group can be detachably fixed at the bottom of the base pole, improving the appearance and preventing danger in operation. It is.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 10 denotes a base pole that folds and stores the second telescopic pole group 8. A bottom metal fitting 11 is inserted into the lower end opening of the base pole 10, and the bottom metal fitting 11 is caulked from the outer periphery of the base pole 10. It's fixed. The bottom metal fitting 11 has a cylindrical shape with a closed bottom, and a screw hole 12 for fixing the base pole 10 to the cabinet is opened at the center of the bottom, and a spring 13 as a biasing means is installed inside the bottom metal fitting 11. and washers 14 are inserted. A circular stopper receiver 15 is screwed and fixed to the upper part of the bottom metal fitting 11, and an insertion hole 16 is provided in the center of the stopper receiver 15.
is open. The insertion hole 16 has a circular center portion, and elongated holes are connected outward at positions 180 degrees opposite the circle. The second telescopic pole group 17 is longer than the other poles, and the pole 17 with the smallest diameter
A stopper 18 is inserted into the bottom opening. The stopper 18 is formed with an opening 15 that communicates in the side direction, and by caulking a pair of spring pieces 20 wound around the outer periphery of the minimum diameter pole 13 into the opening 19, the minimum diameter pole 17 and the stopper 18 are closed. are connected. A small diameter rod 21 extending downward is connected to the bottom of the stopper 18, and a pair of engaging protrusions 22 are provided on the outer periphery of the lower end of the rod 21. A knob 23 is fixed to the outer periphery of the upper end of the pole 17 having the smallest diameter.

The minimum diameter pole 17 is hollow inside, and stores the connection tool 9 and the first telescopic pole group 7 inside, and the outer periphery of the connection tool 9 is pressed against the inner periphery of the minimum diameter pole 17. A spring piece 24 is provided. A notch 25 is formed in the upper part of the connecting tool 9, and the base metal fitting 26 fixed to the lower part of the first telescopic pole group 7 is inserted into the notch 25, and the connecting tool 9 is inserted into the notch 25.
and the base metal fitting 26 are connected by a pin 27. A top 28 is fixed to the upper end of the smallest diameter pole in the first telescopic pole group 7.

Next, the operation of this embodiment will be explained.

FIG. 3 shows a state in which the first and second telescopic pole groups 7 and 8 are housed in the base pole 10. To extend the first telescopic pole group 7 from this state, the top 28 must be pinched with your fingers. , when the top 28 is pulled upward, the first telescopic pole group 7 is subsequently pulled out.
The state shown in FIG. 2 shows a state in which the first telescopic pole group 7 has come out of the minimum diameter pole 17, and the upper half of the connector 9 protrudes from the upper end of the knob 23. The fully extended length of the first telescoping pole group 7 matches the FM frequency band. The connecting tool 9 and the base metal fitting 26 can be tilted by the notch 25, and the connecting tool 9 and the pole 17 with the smallest diameter can be rotated while being held by the spring piece 24, and the first telescopic pole group 7 can be freely tilted and rotated to match the direction of the incoming radio waves.

Next, in order to extend the second telescopic pole group 8, pinch the knob 23, push down the pole 17 with the smallest diameter slightly against the spring 13, and rotate it slightly. When the knob 23 is matched and the knob 23 is released, the pole 17 with the smallest diameter will slightly pop upward due to the biasing force of the spring 13.
Then, if you pull up the knob 23, the second
The telescopic pole group 8 is pulled out from the base pole 10 following the pole 17 with the smallest diameter. This first and second
The fully extended length of the telescopic pole groups 7 and 8 matches the frequency used for the transceiver.

The base pole 10 is created by reducing the second telescopic pole group 8.
To store it inside, push down the knob 23 and fold the second telescopic pole group 8. Then, the projection 22 of the stopper 18 is made to match the shape of the insertion hole 16, the projection 22 and the rod 21 are brought into contact with the washer 14, and inserted into the insertion hole 16. Then, when the knob 23 is rotated about 90 degrees, the projection 23 is removed. It is located at a position offset from the long hole of the insertion hole 16, and when the knob 23 is released, the tip of the rod 21 is urged by the spring 13 and washer 14, and the projection 22 engages with the lower surface of the stopper receiver 15. Therefore, the stopper 18 is locked to the stopper receiver 15, and the minimum diameter pole 17 to which the stopper 18 is fixed is fixed to the base pole 10. Next, when the top 28 is pushed down, the first telescoping pole group 7 and the connector 9 are connected to the smallest diameter pole 17.
It is pushed inside and becomes folded as shown in Figure 3.

Since the antenna device of the present invention is configured as described above, only the first telescopic pole group or the second
In addition to being able to use the telescopic pole group in the fully extended state at the same time, the mechanism that fixes the base pole and the smallest diameter pole is not exposed to the outside, which improves the appearance and prevents fingers from being scratched by pins, etc. It's nothing. Furthermore, even when the first telescopic pole group is fully extended, the smallest diameter pole of the second telescopic pole group that holds the first telescopic pole group can be fixed without rotating, and the first telescopic pole group can be fixed without rotating. is reliably held at a predetermined angular position adjusted by the connector, allowing stable transmission and reception.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an antenna device attached to a receiver, FIG. 2 is a partially sectional side view showing an embodiment of the present invention, and FIG. 3 is a side view showing the same in a folded state. FIG. 4 is a plan view showing the stopper receiver same as above, and FIG. 5 is a side sectional view showing the stopper same as above. 6... Antenna device, 7... First telescopic pole group, 8... Second telescopic pole group, 9... Connection tool,
DESCRIPTION OF SYMBOLS 10... Base pole, 13... Spring as biasing means, 15... Stopper receiver, 16... Insertion hole, 17... Minimum diameter pole, 18... Stopper.

Claims (1)

[Scope of utility model registration request] The upper end of the second telescopic pole group is rotatably and tiltably connected to the lower end of the first telescopic pole group using a connector, and either only the first telescopic pole group or both the first and second telescopic pole groups are connected. The bottom of the base pole with the largest diameter in the second telescopic pole group is provided with an insertion hole at its center. A stopper receiver is fixed, and a stopper that removably engages with the insertion hole of the stopper receiver is fixed to the bottom of the pole with the smallest diameter in the second telescopic pole group, and the stopper is fixed to the bottom of the base pole. An antenna device characterized in that it is provided with a biasing means that always biases the stopper upward when the stopper is engaged with the stopper.