JPS62263Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention provides an antenna device that can match any frequency when receiving or transmitting two different frequency bands.

[Conventional technology]

Some conventional receivers have medium wave, short wave and FM
There are some types that can receive two or more different frequency bands such as. In order to receive the plurality of frequency bands, it is known that a receiver is equipped with a single antenna, 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 the wavelengths of medium waves and short waves are long, so they can be received well even with a short antenna length, but the wavelength of FM is short, and if the wavelength is not carefully considered and matched, the FM frequency band cannot be received well. This is because it cannot be received. Furthermore, although the wavelength of 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 also has a transmitting function, so it is If the antenna lengths are not matched, the efficiency will be poor, and the antenna length is determined by considering the wavelength. 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. In order to install an antenna that sufficiently matches both the FM frequency band and the transceiver frequency band in a receiver with this combined function, it is necessary to install an antenna that matches the FM wavelength and another that matches the wavelength of the transceiver frequency. Therefore, two antennas of different lengths would have to be installed in a single receiver. In this case, the receiver becomes large, which is inconvenient to carry, and the two types of antennas must be expanded and contracted separately, which is troublesome in use. For this reason, as shown in FIG. 1, an antenna device that can match wavelengths of different frequency bands with one antenna device has been proposed. In FIG. 1, 1 is a receiver with a transceiver function, which has a microphone 2, a speaker 3, a frequency scale 4, a knob 5, etc., and an antenna device 6 that can be expanded and contracted up and down is provided on the top surface of the receiver 1. be. The antenna device 6 is a so-called rod antenna in which a plurality of metal pipes with different diameters are inserted in a telescopic manner, and the first telescopic pole group 7, the second telescopic pole group 8, and both can be tilted and rotated. It is composed of a connector 9 that can be connected. In the case of this antenna device 6, when receiving FM, the
The telescopic pole group 7 is pulled out from the receiver and matched to the wavelength of the FM frequency band. When used as a transceiver, the first telescoping pole group 7 and the second telescoping pole group 8 are also pulled out from the receiver to increase the antenna length and match the wavelength of the frequency band of the transceiver. FIG. 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 that of FM, and when used as a transceiver, the length of the antenna becomes longer.) When receiving FM, the connector 9 connects to the receiver 1.
The first telescopic pole group 7 protrudes from the upper surface of the
can be rotated and tilted freely. 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, it is also possible to provide a tilting metal fitting that can rotate and tilt at the lower end of the second telescoping pole group 8.)

[Problem that the invention attempts to solve]

The above-described antenna device 6 in which the first telescoping pole group 7 and the second telescoping pole group 8 are connected has the following problems. First, in the antenna device 6 of the above type, the first
Only the telescopic pole group 7 is extended to receive FM broadcasting, and at this time, the position and angle of the antenna rotation and tilting are regulated by the connector 9.
For this reason, the connecting tool 9 has a structure that generates a strong rotational friction force on the inner surface of the smallest diameter pole of the second telescopic pole group 8 into which it is inserted, so that the smallest diameter pole can be fixed by some means. If you do not fix it with
When the telescopic pole group 7 is rotated and tilted, each of the minimum diameter poles rotates without permission, resulting in an inconvenience in which the regulation of the position and angle of the antenna becomes unstable. Further, in the antenna device 6 of the above-mentioned type, the first
When both the telescopic pole group 7 and the second telescopic pole group 8 are fully extended and used, both telescopic pole groups 7,
Since there is a bendable connector 9 in the middle of the antenna device 8, when the antenna device 6 is shaken, the connector 9 in the middle
There was a problem in that the first and second telescopic pole groups 7 and 8 were not aligned in a straight line due to the bending.

[Means to solve the problem]

The present invention was proposed in order to solve the above-mentioned problems, and as a means for this purpose, the first telescoping pole group and the second telescoping pole group are connected by a connector so as to be tiltable and rotatable. In the antenna device, (i) First, the length of the minimum diameter pole of the second telescopic pole group that is connected to and accommodates the first telescopic pole group is longer than the length of the base pole that accommodates the second telescopic pole group. A cylindrical knob that can be slid only in the axial direction and is always elastically biased outward is provided on the protruding end of the minimum diameter pole, and the knob is The problem mentioned above can be solved by providing a locking means between the end of the base pole and having an engaging pin on one side and a slit into which the engaging pin fits on the other side. This eliminates the inconvenience of unstable regulation of the antenna position and angle when only one group of telescopic poles is extended and used. a resiliently biased engagement ball is provided, and the connecting device is inserted into the smallest diameter pole of the second group of telescoping poles in a reciprocal position in which at least the connecting device is extended into the end of the smallest diameter pole. In some cases, when a fitting part into which the above-mentioned engaging ball fits is formed and both the first and second telescoping pole groups are fully extended and used, the engagement between the above-mentioned engaging ball and the fitting part is Accordingly, the antenna can be held in a straight line by preventing intermediate refraction between the first and second telescopic pole groups as described in the above-mentioned problem.

【Example】

Hereinafter, one embodiment of the present invention will be described with reference to FIG. 2 and the following drawings. The antenna device includes a first telescopic pole group 7 and a second telescopic pole group 7.
The telescopic pole group 8 is connected to be tiltable and rotatable by a bendable connector 9, and the base pole 10 that houses the second telescopic pole group 8 has its lower end closed. There is also an L on the top edge.
A key-shaped slit 11 is cut out. The length of the innermost minimum diameter pole 12 in the second telescopic pole group 8 is made slightly longer than the length of the base pole 10 so that the tip of the minimum diameter pole 12 partially protrudes even in the contracted state. As will be explained in detail later, a cylindrical knob 13 that can slide only in the axial direction is provided on the outer periphery of the protruding end of this minimum diameter pole 12. A mating engagement pin 14 protrudes. A first telescopic pole group 7 is housed within the minimum diameter pole 12, and the base end of the first telescopic pole group 7 is connected to the minimum diameter pole 1 by the connector 9.
It is connected to the tip of No.2. This connector 9 is
a base metal fitting 15 that is locked to the minimum diameter pole 12 side;
A tongue piece 19 of the base metal fitting 16 is formed in a concave connecting groove 18 formed at the upper end of the base metal fitting 15.
is inserted, and both are connected by a pin 17 so as to be bendable. Note that a top 20 is fixed to the tip of the smallest diameter pole in the first telescopic pole group 7. 6 and 7 specifically show the connecting tool 9. The upper end of the minimum diameter pole 12 is constricted to have a slightly smaller diameter, and there is a gap between this constricted portion 21 and the main body pole. A stepped portion 21a is formed due to a difference in diameter. The base metal fitting 15 has a cylindrical shape as a whole, and an annular locking collar 22 is fixed to the outer periphery of the center portion, and the outer diameter of the locking collar 22 is slightly smaller than the inner diameter of the minimum diameter pole 12. The upper half of the base metal fitting 15 has an outer diameter slightly smaller than the inner diameter of the constricted part 21, and the lower half of the base metal fitting 15 has a smaller outer diameter than the upper half, and has a circular shape on its outer periphery. Oil grooves 23 and lateral grooves 24 are formed at intervals over the entire circumferential direction. A press-fit fitting 25 is fitted into the lower half of the base metal fitting 15 . At the center of this press-fit fitting 25,
An insertion hole 26 having the same inner diameter as the outer diameter of the lower half of the base metal fitting 15 opens upward, and the press-fit fitting 25
An annular sliding portion 27 whose outer diameter is the inner diameter of the pole 12 having the smallest diameter is formed at the lower part of the pole 12 . A ball holding hole 28 is opened through the sliding portion 27 in the radial direction perpendicular to the axial direction of the press-fit fitting 25 , and a pair of slide grooves 29 are formed in the sliding portion 27 in the axial direction of the press-fit fitting 25 . is formed. Further, a horizontally divided groove 30 is cut into the center of the press-fit fitting 25 and communicates with the insertion hole 26 over half of its circumferential direction.
A vertical groove 31 is cut in the axial direction throughout.
Also, on the outer periphery of the press-fit fitting 25, a pair of engagement holes 32 are provided at positions one-quarter and a half circle away from the vertical groove 31.
is formed, and a protrusion 34 of a semicircular spring piece 33 is engaged with this engagement hole 32. Then, the insertion hole 26 of the press-fit fitting 25 is inserted into the lower half of the base metal fitting 15, the half-moon-shaped stopper 35 is inserted from the horizontal groove 30, and the stopper 35 is engaged with the horizontal groove 24. The metal fitting 15 and the press-fitting metal fitting 25 are coupled together to prevent them from coming off. Further, a spring 36 is inserted into the ball holding hole 28 provided in the press-fit fitting 25, and the spring 36 causes the holding hole 28 to
The engagement balls 37 fitted inside both ends of the holder are elastically urged outward in the radial direction. On the other hand, the minimum diameter pole 12 is located at a position a little apart from its upper end (the first telescopic pole group 7 is located at the second
(When the connector 9 is extended from the telescopic pole group 8 and located within the end of the minimum diameter pole 12)
A fitting portion (an engagement hole 38 in this embodiment) into which the engagement ball 37 fits is provided. This engagement hole 38 is formed to have a diameter slightly smaller than the outer diameter of the engagement ball 37, and when the engagement ball 37 is engaged with this engagement hole 38, that is, the ball holding hole 28 is engaged. When in the position of the matching hole 38, the base of the first telescopic pole group 7 and the connecting tool 9 connected thereto are set in a mutual positional relationship such that they are located within the end of the minimum diameter pole 12. . 4 and 5 show the vicinity of the aforementioned knob 13. An annular collar 40 is fixed to the outer periphery of the step 21a of the minimum diameter pole 12, and this collar 40 has a pair of protrusions 41. is formed in the axial direction. The knob 13 has a cylindrical shape, and a pair of guide grooves 42 are formed in the axial direction of the inner circumference, and when the guide grooves 42 fit into the protrusions 41, the knob 13 fits into the minimum diameter pole 12. However, it is configured so that it can slide only in the axial direction. The tip of the minimum diameter pole 12 is curled outward to form an end 44, and the knob 13 is prevented from jumping out from the minimum diameter pole 12 by being locked to this end 44. A spring 43 is installed inside the knob 13, and when one end of the spring 43 comes into contact with the collar 40, the knob 13 is always elastically biased outward. Next, the operation of this embodiment will be explained. When attempting to receive the FM frequency band, pinch the top 20 with your fingers and pull it upward. top 20
By pulling out, the first telescopic pole group 7 is pulled out from the minimum diameter pole 12 of the second telescopic pole group 8. When the first telescopic pole group 7 is fully extended, the connecting tool 9
By protruding upward from the minimum diameter pole 12, the extended first telescopic pole group 7 can be freely tilted and rotated by the connecting tool 9, and can be held at a predetermined angle. In this state, the engagement pin 14 protruding from the knob 13 is engaged in the slit 11 provided in the base pole 10, thereby restricting the extension and rotation of the second telescoping pole group 8. The state will be as follows. When performing transmission/reception operations as a transceiver, with the first telescoping pole group 7 fully extended, the knob 13 is pinched and pushed in slightly against the spring 43. Next, turn the knob 13 a little to remove the engagement pin 14 from the slit 11. As a result, the knob 13 protrudes due to the force of the spring 43, and the knob 1
3 will be removed from the base pole 10. Next, when the knob 13 is pulled out, the second telescopic pole group 8 is pulled out, and the first telescopic pole group 7 and the second telescopic pole group 8 are fully extended. In this case, once the first and second telescopic pole groups 7 and 8 are fully extended, the first telescopic pole group 7 is
Push the connector a little into the telescopic pole group 8, and then attach the connector 9.
into the end of the smallest diameter pole 12. As a result, the engagement ball 37 is elastically biased by the spring 36 and protrudes outward in the radial direction and is fitted into the fitting portion (the engagement hole 38), so that the connecting tool 9 is click-stopped (the first (See Figure 10). At this time,
The connector 9 is housed within the smallest diameter pole 12 and the first
Similarly, the base of the telescopic pole group 7 also has the minimum diameter pole 12.
Therefore, the first and second telescopic pole groups 7, 8 are in a straight line when fully extended,
Even if the antenna device 6 is shaken, it will not tilt at the position of the connecting tool 9. Note that the fully extended length of the first and second telescoping pole groups 7 and 8 is a length that matches the frequency band of the transceiver. To retract the first and second telescopic pole groups 7 and 8, pinch the top 20 or the knob 13, push it down, push it into the base pole 10, and finally, pinch the knob 13 and tighten the engagement pin 14. When the engagement pin 14 is aligned with the slit 11, the spring 43 moves the engagement pin 14 within the slit 11, and then the knob 1
3 to insert the engaging pin 14 into the innermost part of the slit 11. With this, the knob 13 is set to the base pole 1.
Can be fixed to 0. FIG. 3 shows the antenna device 6 in a reduced state. Figures 8 and 9 show knob 13 and minimum diameter pole 1.
In this example, a resin collar 45 as shown in FIG. 5 is fixed to the outer periphery of the tip of the minimum diameter pole 12. A flange portion 46 having a slightly larger diameter is formed at the lower end of the collar 45, and a pair of guide grooves 47 extending in the axial direction are cut into the upper end. A pair of protrusions 48 protruding inward are provided on the inner periphery of the knob 13, and the protrusions 48 fit into the guide grooves 47. The lower end of the knob 13 is bent inward to form a caulked portion 49, and this caulked portion 49 is held in contact with the lower end of the flange portion 46 to prevent the knob 13 from coming off. A spring 50 is interposed between the flange portion 46 and the knob 13 inside the knob 13. In this configuration, the knob 13 is always urged upward by the spring 50, and the knob 13
8 and the guide groove 47, the minimum diameter pole 1
2, it can only slide in the axial direction.

[Effect of the idea]

Since the antenna device of the present invention is configured as described above, only the first telescopic pole group 7 or the first
Not only can the telescopic pole group 7 and the second telescopic pole group 8 be used in an extended state at the same time, but also the following effects can be obtained when using them. (1) First of all, when only the first telescopic pole group 7 is extended and used, the minimum diameter pole 12 of the second telescopic pole group connected to the first telescopic pole group has a protruding end at its tip. The knob 13 provided in
1, even if the connecting tool 9 is in contact with and supported by the inner surface of the minimum diameter pole 12 with a strong rotational friction force, it will not hold when the antenna tilts or rotates. The antenna of the first telescoping pole group is reliably placed at a predetermined rotational position and tilting position without causing the minimum diameter pole 12 to rotate without permission or the second telescoping pole group 8 to inadvertently extend. Regulations can be maintained. Further, the knob 13 constituting the above-mentioned locking means is
Since this is elastically urged outward in the axial direction by a spring or the like, the operating force required to fix and release the first telescopic pole group 7 is small, and the operability itself can be easily performed. (2) Secondly, when both the first telescopic pole group and the second telescopic pole group are fully extended, the In a position where the intervening bending connector 9 is housed within the end of the pole 12 with the smallest diameter, the connector 9 is engaged with the engagement ball 37 and the fitting portion (the engagement hole 38) to form the smallest diameter pole. Since the antenna device 6 can be fixedly held on the inner surface of the antenna device 12, the first and second telescoping poles can be held in a straight line, and problems such as tilting at the position of the connector 9 even when the antenna device 6 is shaken can be avoided. .

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an antenna device of a receiver to which the present invention is applied, FIG. 2 is a side view partially sectionally showing an embodiment of the antenna device according to the present invention, and FIG. A side view showing the same antenna device as above in a contracted state, Fig. 4 is an enlarged partial cross-sectional view showing the knob portion, Fig. 5 is a sectional view taken along line A-A in Fig. 4, and Fig. 6 is a connecting device. FIG. 7 is an exploded perspective view of the same connector as above, FIGS. 8 and 9 are partially sectional side views and perspective views showing other embodiments of the knob, and FIG. FIG. 7 is a partial cross-sectional view showing a state in which the connecting tool and the minimum diameter pole are engaged with each other during use when the second telescopic pole group is fully extended. In the figure, 6... antenna device, 7... first
Telescopic pole group, 8...Second telescopic pole group, 9
... Connection tool, 10 ... Base pole, 11 ... Slit, 12 ... Minimum diameter pole, 13 ... Knob,
14...Engagement pin, 37...Engagement ball, 38...
...Engagement hole, 43...Spring.

Claims (1)

[Claims for Utility Model Registration] A first telescoping pole group and a second telescoping pole group are connected so as to be tiltable and rotatable by a bendable connector, and only the first telescoping pole group is extended; Alternatively, in an antenna device that is capable of extending both the first telescoping pole group and the second telescoping pole group to match any frequency of a plurality of different frequency bands, the first telescoping pole group is connected to the same pole. The smallest diameter pole of the second telescopic pole group that accommodates the group is
The length of the pole is longer than that of the base pole that accommodates the telescopic pole group, and the end thereof is made to protrude, and the protruding end of this minimum diameter pole is capable of sliding only in the axial direction and is always elastically biased outward. A cylindrical knob is provided, and a locking means is provided between the knob and the end of the base pole, with an engaging pin formed on one side and a slit into which the engaging pin fits on the other side, and , the connecting tool is provided with an engaging ball that is elastically biased outward in the radial direction perpendicular to the axis thereof, and at least the connecting tool is attached to the smallest diameter pole of the second telescopic pole group into which the connecting tool is inserted. An antenna device comprising: a fitting portion into which the engaging ball fits when the ball is in an extended interrelated position within the end of the minimum diameter pole.