JPS6320174Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an in-vehicle antenna in which a rod antenna is installed in a vehicle such as an automobile.

Conventionally, the installation method for this type of in-vehicle antenna is as follows:
There are three methods: That is, there are two methods: one in which the rod antenna is fixed vertically, one in which it is fixed at a predetermined angle of inclination, and one in which the rod antenna can be set in two ways: a vertical state and a horizontal state. However, in the vertical fixation method, reception is performed using a vertical polarization method even though Japan's broadcast transmission system uses a horizontal polarization method, so although receiving sensitivity is high, it is disadvantageous against multipath. In addition, since the overall height is higher, the rod antenna may bend due to collision with objects located above, such as guards or ceilings.
It had the drawback of breaking. On the other hand, the tilted fixation method is advantageous against multipath, but the reception sensitivity in a wide place without radio wave protection is inferior to the vertical fixation method. Also, although the overall height is somewhat lower, there is still the risk of hitting objects located above. Furthermore, methods that can be changed between vertical and horizontal states have the same drawbacks as the vertical fixing method when in the vertical state, and when in the horizontal state, that is, when completely collapsed, objects located above Although you will no longer be hit by
The drawback was that the sensitivity was extremely low.

In addition, as conventional techniques for adjusting a rod antenna to any angle between a vertical state and a horizontal state, for example, Japanese Utility Model Publication No. 40-21216 and Japanese Utility Model Publication No. 52-52
Publication No. 11469 etc. were published. And the conventional technology is
A locking seat having a plurality of holes is fixed to the front surface of the insulating stand, and a protrusion that engages with the holes is provided on the antenna mounting base, and the antenna mounting base is always engaged by the elasticity of the coil spring. It is configured to be adhered to the stop seat.

Furthermore, in the prior art, a tilting body to which an antenna is attached is attached by a shaft to a locking plate having concave portions and convex portions at different distances on a circle from the axis, and this tilting body has a large diameter portion and a small diameter portion. The locking body is mounted so that the large diameter part of the locking body matches the recess of the locking plate and is constantly pressed and locked by a spring, and by pressing the locking body from the outside, the shaft is centered. The small-diameter portion of the locking body jumps over the convex portion of the locking plate and tilts to lock into another concave portion of the locking plate.

Since these conventional technologies are configured as described above, the antenna can be adjusted to any desired position by grasping the antenna mounting base with one hand and grasping and pulling the spiral portion of the antenna with the other hand. Alternatively, the antenna can be tilted with one hand while pressing the protruding part of the locking body.

Therefore, position adjustment operations using both hands are required in both cases, and since the operation direction of pulling the mounting base or pressing the protruding part is different from the direction of antenna angle displacement, it is difficult to manipulate the angle of the antenna. The problem was that it was unnatural.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention has been developed by rotatably pivoting the base of the antenna to a fixed support configured to be fixed to a vehicle, and fixing the antenna at an arbitrary inverted angle. In the vehicle-mounted antenna, a plurality of locking grooves are formed on the circumferential edge of the fixed support part, and
A locking/disengaging arm having a pawl that can be freely engaged and disengaged from the locking groove is attached to the antenna via an elastic body that biases it in an expansion direction, and the pawl is engaged with the locking groove due to the elastic force of the elastic body. The purpose of the present invention is to provide an on-vehicle antenna that is configured to provide the best reception conditions in response to changes in the reception environment, can deal with obstacles, and has improved operability. It is.

Hereinafter, the present invention will be explained based on the embodiments shown in the drawings. Fig. 1 is a side view with a part omitted of the in-vehicle antenna according to the invention, Fig. 2 is a rear view of the same, and Fig. 3 is a side view of the in-vehicle antenna according to the invention.
5 to 5 are partially cutaway side views showing the operating state of the vehicle-mounted antenna, and FIG. 6 is a side view of the vehicle-mounted antenna installed in an automobile.

In the drawings, reference numeral 1 denotes a fixed support part, and the fixed support part 1 includes cylindrical fixing parts 2a and 2b configured to be fixed to a vehicle C such as an automobile, and the fixing part 2.
It consists of a support plate 3 welded to the fixing parts 2a and 2b, and the support plate 3 is in a vertical state when the fixed parts 2a and 2b are fixed to the vehicle C. A pin hole 4 is formed in the triangular portion of the support plate 3, and a circumferential edge 5 having a predetermined radius is formed around the pin hole 4. A plurality of (three in the drawings) locking grooves 6a, 6b, and 6c are formed on the circumferential edge 5 at regular intervals.

Reference numeral 7 denotes a support cylinder, into which the base of the rod antenna A is fitted and fixed. Note that the lead wire connecting rod antenna A to the receiver is omitted. From the side of the support tube 7, the support plate 3
A pair of arms 8a and 8b are provided in parallel and projecting apart from each other by a thickness of . The support tube 7 is constructed by inserting the support plate 3 between the two arms 8a and 8b, and by inserting the support plate 3 into the screw holes 4 of the support plate 3 and the two arms 8a and 8b.
By inserting a screw 9 into the screw hole (not shown) in b, it is attached to the support plate 3 so as to be rotatable about the screw 9 as a fulcrum.

Reference numeral 10 denotes a locking/unlocking arm, and the lower end of the arm 10 has locking grooves 6a, 6b, 6 formed in the support plate 3.
c, and a claw 10a that can be freely locked is provided. This engaging/disengaging arm 10 is connected to both arms 8 of the support cylinder 7.
The claw 10a is located between the locking grooves 6a and 6b.
It is rotatably pivoted by a pin 11 so that it can be freely locked with b and 6c. Reference numeral 12 denotes a spring; one end of the spring 12 wound around the pin 11 is brought into contact with the side surface of the support cylinder 7, and the other end is locked to the arm 10 for engaging and disengaging. Claw 10a
provides a rotational force that constantly urges the circumferential edge 5 side of the support plate 3.

Next, the operation of the above embodiment will be explained with reference to FIGS. 3 to 5 and 6. First, the in-vehicle antenna is fixed at a predetermined position on the vehicle C using the fixing parts 2a and 2b in the state shown in FIG. As shown in FIG. 3, when the claw 10a of the locking/disengaging arm 10 is engaged with the uppermost locking groove 6a, the rod antenna A is held in an almost vertical position and the receiving sensitivity is at its highest. Become. next,
When the free end of the locking/disengaging arm 10 is pushed toward the rod antenna A side by hand, the claw 10a is released from the locking groove 6a, and the rod antenna A becomes rotatable about the pin 9 as a fulcrum. Then, as shown in FIG.
When the rod antenna 0a is engaged with the intermediate locking groove 6b, the rod antenna A is fixed at a predetermined inclination angle, and although the reception sensitivity is somewhat reduced, it is advantageous for multipath. After releasing the claw 10a from the locking groove 6b again,
When the rod antenna A is rotated so that it engages with the lowest locking groove 6c, the rod antenna A is completely laid down as shown in FIG. 5, and will not collide with objects above, such as the ceiling or guard. be spared from

Incidentally, in the above embodiment, the rod antenna A is held in a predetermined inverted position in stages by the engagement/disengagement action between the plurality of engagement grooves 6a, 6b, 6c formed in the fixed support part 1 and the claw 10a of the engagement/disengagement arm 10. Although it is designed to be fixed at an angle, other locking/disengaging mechanisms may be used.
Further, the inverted angle of the rod antenna A may be configured to be continuously variable, and in this case, if a motor is used as the drive source for inverted, it becomes possible to remotely control it within the vehicle C.

As described above, the present invention is such that the base of the antenna A is rotatably attached to the fixed support part 1 configured to be fixed to the vehicle C, and the antenna A can be fixed at any inverted angle. In this vehicle-mounted antenna, a plurality of locking grooves 6a, 6b, and 6c are formed in the circumferential edge 5 of the fixed support part 1, and
A claw 10 that can be freely engaged and detached from the locking grooves 6a, 6b, and 6c.
The locking/disengaging arm 10 having a shape of 10a is attached to the antenna via an elastic body that urges it in the expansion direction, and the claw 10a is moved into the locking groove 6 by the elastic force of the elastic body.
a, 6b, and 6c.

Therefore, the best reception condition can be obtained in response to changes in the reception environment, and obstacles can be dealt with. Moreover, the operation can be performed with one hand, and since the engaging/disengaging arm is grasped integrally with the antenna base, there is no unnaturalness in the angular displacement operation of the antenna.

[Brief explanation of the drawing]

FIG. 1 is a side view of the vehicle-mounted antenna according to the present invention, FIG. 2 is a rear view thereof, and FIGS. 3 to 5 are partially cut-away side views showing the operating state of the vehicle-mounted antenna. Figure 6 is a side view of the in-vehicle antenna installed in a vehicle. 1... Fixed support part, 5... Circumferential edge, 6a, 6
b, 6c...Latching groove, 10...Claw, 10a...Latching groove, A...Rod antenna.

Claims (1)

[Scope of utility model registration request] A vehicle-mounted antenna is provided in which the base of the antenna is rotatably pivoted to a fixed support configured to be fixed to a vehicle, and the antenna can be fixed at any inverted angle, wherein the fixed support is fixed to a vehicle. A plurality of locking grooves are formed in a circumferential edge, and a locking and disengaging arm having a claw that can be freely connected to and detached from the locking groove is attached to the antenna via an elastic body that biases in the expansion direction, and the elastic body An on-vehicle antenna characterized in that the claw is engaged with the locking groove by an elastic force.