JPS62264Y2 - - Google Patents

Description

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

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

[Conventional technology]

Some traditional receivers include medium wave, short wave and FM
There are some types that can receive two or more different frequency bands. 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 properly. This is because it cannot be received. In addition, 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 difficult to match the wavelength of the transmitting and receiving frequencies. If the antenna is not long enough, the efficiency will be poor, so 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 it is also troublesome that one of the two types of antenna must be specially expanded and contracted during use. For this reason, as shown in FIG. 1, an antenna device has been proposed that can match wavelengths of different frequency bands with a single antenna device. In FIG. 1, 1 is a receiver with a transceiver function that includes 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 concentrically, and the first telescopic pole group 7 and the second telescopic pole group 8 are connected so that they can be tilted and rotated. It is made up of a connecting tool 9. This antenna device 6
In this case, 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 as well as the first telescoping pole group 7 are pulled out from the receiver 1 to increase the length of the antenna and match the wavelength of the frequency band of the transceiver. The state shown in FIG. 1 shows the state in which it is used as a transceiver, and is fully extended. (Generally, the frequency band of the transceiver is
The frequency band is lower than that of FM, and the antenna length is longer when used in a transceiver. ) When receiving FM, the connector 9 protrudes from the upper surface of the receiver 1, and the first telescopic pole group 7 can freely tilt and rotate. 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
It is not possible to reliably hold the telescopic pole group 7 at a predetermined rotational position or tilting position, and each pole with the smallest diameter rotates without permission, resulting in an inconvenience in which the regulation of the antenna position and angle becomes unstable. Ta. 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 minimum diameter pole length of the second telescopic pole group that is connected to and accommodates the first telescopic pole group is determined from the length of the base pole that accommodates the second telescopic pole group. Make it slightly longer and make the end protrude.
A cylindrical knob that can slide only in the axial direction and is always elastically biased outward is provided at the protruding end of the minimum diameter pole, and one of the knobs is provided between the knob and the end of the base pole. By providing an engaging pin on the other hand and a locking means formed with a slit into which the engaging pin fits, only the first telescopic pole group mentioned in the above problem can be extended and used. (ii) In addition, the bendably pivoted connector has a tongue piece on the base metal fitting connected to the first telescoping pole group. and a base metal fitting that is locked to the end of the smallest diameter pole of the second telescopic pole group, a recess is formed on one side, and an engaging ball that fits into the recess is elastically biased on the other side. When the first telescopic pole group and the second telescopic pole group are in a straight line state, when both the first and second telescopic pole groups are fully extended and used so that the engagement ball engages with the recessed portion, This antenna is characterized in that the antenna can be held in a straight line by preventing intermediate refraction between the first and second telescoping 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 first
The telescoping pole group 8 is connected so as to be tiltable and rotatable by a bendable connector 9, and the base pole 10 that houses the second telescoping 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. In the second telescopic pole group 8, the innermost minimum diameter pole 12 has a length slightly longer than the length of the base pole 10 so that even in the contracted state, the minimum diameter pole 12
A portion of the tip of the pole 2 protrudes, and a cylindrical knob 13 that can slide only in the axial direction is provided on the outer periphery of the protruding end of the minimum diameter pole 12, as will be explained in detail later. An engaging pin 14 that engages with the slit 11 protrudes from the outer periphery of the knob 13. 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. As is clear from FIGS. 6 and 7, this connecting tool 9 includes a base metal fitting 15 that is locked to the minimum diameter pole 12 side, and a base that is fixed to the base end side of the first telescoping pole group 7. The base metal fitting 16 is inserted into the concave connecting groove 18 formed at the upper end of the base metal fitting 15.
A tongue piece 19 is inserted thereinto, and both are connected by a pin 17 so as to be bendable. The above connection tool 9
A constriction formed at the tip of the minimum diameter pole 12 prevents the base metal fitting 15 from slipping out. The base metal fitting 15 has a cylindrical shape as a whole, and a ball receiving hole 21 that opens toward the connecting groove 18 is bored deep inside the concave connecting groove 18 formed in the upper half thereof. An engagement ball 28 elastically biased by a spring 22 is inserted into the ball receiving hole 21. The lower half of the base metal fitting 15 has a smaller outer diameter than the upper half, and oil grooves 23 and lateral grooves 24 are formed on the outer periphery at intervals over the entire circumferential direction. A press-fit fitting 25 is fitted into the lower half of the base metal fitting 15 . This press-fit fitting 25 has an insertion hole 26 at its center for insertion into the lower half of the base metal fitting 15.
has a through opening, and an annular sliding portion 27 whose outer diameter is the inner diameter of the pole 12 having the smallest diameter is formed at the upper end of the press-fit fitting 25. A pair of slide grooves 29 are formed in the sliding portion 27 along the axial direction of the press-fit fitting 25.
9 fits into a guide rail 36 extending in the axial direction and protruding from the inner surface of the minimum diameter pole 12. In addition, a horizontally divided groove 30 is cut into the center of the side surface of the press-fit fitting 25 and communicates with the insertion hole 26 over half of its circumferential direction. A longitudinal groove 31 is cut along the line. Engagement holes 32 are formed at positions one-fourth of a semicircle away from the vertical groove 31 on the lower outer periphery of the press-fit fitting 25, and the protrusions 34 of the semicircular spring pieces 33 is engaged. Then, the press-fit fitting 25 is inserted and fitted into the lower half of the base metal fitting 15 through the insertion hole 26, and the horizontal split groove 30
By inserting a half-moon-shaped stopper 35 and engaging the stopper 35 with the lateral groove 24, the base metal fitting 15 and the press-fitting metal fitting 25 are connected in a manner that prevents them from coming off. The base metal fitting 16 has the above-mentioned tongue piece 19 protruding downward.
A recess 37 into which the engaging ball 28 fits is cut into the protruding end (lower end) of the recess 37 . and tongue piece 19
is inserted into the connection groove 18 of the base metal fitting 15, and the pin 1
7, the engagement ball 28
By the elastic biasing force of the spring 22, the tongue piece 19 is always fitted into the recess 37 of the tongue piece 19 and comes into contact with the tongue piece 19. 4 and 5 show the portion of the knob 13 described above, and the outer periphery of the end of the minimum diameter pole 12 into which the knob 13 is fitted is made of resin as shown in FIG. The collar 45 is fixed. A flange portion 46 having a slightly larger diameter is formed at the end of the collar 45, and a pair of guide grooves 47 are cut in the cylindrical portion opposite to the side on which the flange portion 46 is formed. On the other hand, on the inner periphery of the knob 13, there is a pair of protrusions 48 that protrude inward.
is provided, and this protrusion 48 is connected to the guide groove 47.
It is mated with. 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,
The knob 13 is always elastically biased toward the end by this spring 50. Note that the reference numeral 20 is a top fixed to the tip of the smallest diameter pole in the first telescopic pole group 7. Next, the operation of this embodiment will be explained. First, when attempting to receive the FM frequency band, pinch the top 20 and pull out the first telescoping pole group 7 upward. By pulling out the top 20, the first telescopic pole group 7 is pulled out from the minimum diameter pole 12. When the first telescopic pole group 7 is fully extended, the connecting tool 9
The connector 9 protrudes upward from the pole 12 with the smallest diameter, and the extended first telescopic pole group 7 can freely tilt and rotate, allowing the antenna to be held at a predetermined position and angle. At this time, when the first telescopic pole group 7 is fully extended, the slit 11 provided in the base pole 10
An engagement pin 14 protruding from the knob 13 side is engaged with the second telescopic pole group 8.
is in a state where its extension or rotation is restricted. 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 50, and the knob 13
will come off the base pole 10. Next, when the knob 13 is pulled out, the second telescopic pole group 8 is pulled out and fully extended. In this case, when the first and second telescoping pole groups 7 and 8 are fully extended, the first telescoping pole group 7 at the tip is tilted relative to the second telescoping pole group 8, and the first telescoping pole group 7 is connected to the connecting tool 9. The posture is corrected so that the group 7 and the second telescopic pole group 8 form a straight line. By this posture correction, the tongue piece 19 slides within the connecting groove 18, and since the recess 37 formed at the end of the tongue piece 19 faces the ball receiving hole 21, it is elastically urged into the recess 37. The engagement ball 28 that has been inserted engages and the two are click-stopped. For this reason, the first and second telescopic pole groups 7 and 8 are held in a straight line in a fully extended state, and even if the antenna device 6 is shaken, the engagement force between the engagement ball 28 and the recess 37 makes it easy to Does not tilt. 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 and push it down, push it into the base pole 10, and finally, pinch the knob 13 and push the engagement pin 14. When the engagement pin 14 is aligned with the slit 11, the engagement pin 14 moves within the slit 11 by the spring 43, 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.
2, an annular collar 40 is provided on the outer periphery of the stepped portion 12a of the minimum diameter pole 12.
A pair of protrusions 41 are formed in the axial direction on this collar 40. The knob 13 has a cylindrical shape, and has a pair of guide grooves 4 in the axial direction of the inner circumference.
2 is formed. This guide groove 42 fits into the protrusion 41, so that the knob 13 can slide only in the axial direction of the minimum diameter pole 12. 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 hooked onto this end 44. Then, inside knob 13, knob 13 and color 4
0, a spring 43 is interposed between the two. In this configuration, the knob 13 is always urged upward by the spring 43, and the knob 13
1 and the guide groove 42, the pole 1 with the smallest diameter
Can only slide in the 2nd axis 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 frictional force, the antenna will not move when the antenna is tilted or rotated. , the antenna of the first telescoping pole group is reliably regulated to a predetermined rotational position and tilting position without the minimum diameter pole 12 rotating freely or the second telescoping pole group inadvertently extending. can be retained. 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 telescoping pole group 7 and the second telescoping pole group 8 are fully extended and used, the bendably pivoted connector has the first
A recess 37 is provided on one side and a recess 37 on the other between the tongue piece 19 of the base metal fitting 16 connected to the telescopic pole group and the base metal fitting 15 that is locked to the end of the minimum diameter pole of the second telescopic pole group. The engaging ball 28 that fits into the recess is elastically biased to connect the first telescopic pole group and the second telescopic pole group.
Since the recess 37 and the engaging ball 28 are designed to engage when the telescopic pole groups are in a straight line, this engagement force holds the first and second telescopic pole groups in a straight line. Therefore, inconveniences such as tilting at the position of the connecting tool 9 even when the antenna device 6 is shaken can be eliminated.

[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. 4 is an enlarged partial cross-sectional view showing the knob portion; FIG. 5 is a perspective view showing the collar; FIG. 6 is a sectional view showing the connector; FIG. 7 is an exploded perspective view of the above connector, FIG. 8 is a partially sectional side view showing another embodiment of the knob, and FIG. 9 is a sectional view taken along line A--A in FIG. 8. 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...engaging pin, 28...engaging ball, 37...recess, 50
……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 above-mentioned connecting tool bendably pivots the tongue piece of the base metal fitting connected to the first telescopic pole group and the base metal fitting locked to the end of the minimum diameter pole on the side of the second telescopic pole group by pin coupling. At the same time, between the tongue piece and the base metal fitting, a recess is formed on one side, and an engaging ball that fits into the recess is elastically biased on the other side, so that a first telescopic pole group and a second telescopic pole group are formed. An antenna device characterized in that the other engaging ball is configured to engage with the recessed portion when the ball is in a straight line state.