JP2796266B2 - Antenna support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna supporting device capable of adjusting the angle of an antenna base on which an antenna is mounted and locking the antenna base after adjusting the angle. In particular, the present invention is suitably applied to an antenna support device for mounting an antenna on a vehicle body such as an automobile.

[0002]

2. Description of the Related Art An antenna supporting device of this kind is disclosed in
The antenna is described in, for example, Japanese Patent Application Publication No. 1-45615, in which a rod antenna is attached to a transceiver or the like by an antenna support device. The antenna support device is rotated by turning a knob of the antenna support device,
A free state in which the rod antenna can freely rotate with respect to the transceiver body, and a locked state in which the rod antenna is securely locked to the transceiver body.
It can be in the same supporting state. Therefore, operate the knob of the antenna support device to make the rod antenna free, adjust the rotation of the rod antenna with respect to the body of the transceiver, and after adjustment, turn the knob again to securely lock the rod antenna. can do.

[0003]

By the way, it is conceivable to attach an antenna to a vehicle body such as an automobile through such an antenna supporting device. Also in this case, since the antenna support device can be in a free state and a locked state, it is possible to adjust the direction of the antenna and lock the position after the adjustment. However, an automobile may travel off-road in a mountain forest or the like, and a tree branch or the like may collide with an antenna. Also, when entering the garage, the structure of the garage may collide with the antenna. Further, even when the antenna is attached to a transceiver or the like, the antenna may collide with an object when the transceiver is carried and moved. When the antenna collides with an obstacle after being adjusted and locked, there is a problem that the antenna is damaged.

[0004] Therefore, an object of the present invention is to provide an antenna support device that can prevent damage to an antenna even when the antenna collides with an obstacle.

[0005]

In order to achieve the above object, an antenna support device according to the present invention includes a support plate having a through hole, a support plate inserted into the support plate, A support shaft that is non-rotatably supported on the plate and is movably supported in the axial direction, and is provided at one end of the support shaft;
A receiving seat configured integrally with the support shaft; an elastic member inserted between the receiving seat and the support plate to bias the receiving seat in a direction away from the support plate; and the other end of the support shaft. And an antenna base supported rotatably and axially movably on a support shaft, fitted from the other end of the support shaft, and outside the antenna base. A spacer that is arranged and is supported by the support shaft so as to be non-rotatable and axially movable, a knob rotatably supported at the other end of the support shaft, and inserted from the receiving seat. And a screwing means whose distal end is screwed to the knob. A convex portion is formed on one of the support plate and the antenna base, and an engaging portion is formed on the other. The antenna can be engaged when the antenna base moves to the support plate side. A click mechanism is constituted by the engaging portion and the engaging portion. A protruding portion is formed on one of the spacer and the knob, and a cam surface on which the protruding portion slides is formed on the other. The surface is inclined from the start end toward the end, and includes at least one step provided in the middle, and a step on the end side provided at the end, and the projection When the knob is rotated in one direction to slide the protrusion toward the end of the cam surface from the state where the portion is located at the start end of the cam surface, the protrusion is a cam other than the step portion. While sliding on the surface, the distance between the spacer and the knob gradually increases, and when the protrusion slides on the step, the distance between the spacer and the knob hardly increases. Is formed with a cam surface.

[0006]

The support plate of the antenna support device of the present invention is fixed to the body of an automobile. An antenna such as a rod antenna is mounted on the antenna base. Then, when changing the direction of the antenna, the knob is turned to bring the protruding portion into the state of being located at the start end of the cam surface, that is, in a free state. In this free state, the knob is closest to the spacer, and the elastic member biases the knob toward the support plate via the receiving seat and the support shaft to move the knob. This movement forms a gap between the receiving seat and the support plate. Therefore, the support plate and the antenna base are engaged by the projection and the engagement part. However, when the antenna base is to be rotated, the engagement part is protruded against the urging force of the elastic member. You can get over the department. Then, the antenna base can rotate by a click motion in which the engaging portion and the convex portion repeatedly engage and disengage in order.

On the other hand, when the direction of the rod antenna is fixed, the knob is turned to bring the protrusion into a state in which the protrusion is located at the step on the end side of the cam surface, that is, a locked state. In this locked state, the knob is farthest from the spacer, and accordingly, the receiving seat moves to the supporting plate side via the supporting shaft, and the gap between the receiving seat and the supporting plate is eliminated. Therefore, the antenna base cannot be separated from the support plate. As a result, even if the antenna base is to be rotated, the engaging portion cannot get over the projection, and the antenna base cannot be rotated.

By the way, at least one step is provided on the cam surface of the antenna supporting device in the middle thereof.
The operation can be stopped in a half-lock state between the free state and the locked state. In the half-locked state, the gap between the receiving seat and the support plate is considerably small, and the antenna base cannot easily rotate, but can rotate when a strong force is applied.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the antenna support device of the present invention will be described. FIG. 1 is a side view of an embodiment of the antenna support device of the present invention. FIG. 2 is an exploded perspective view of the antenna support device. FIG. 3 is a rear view of the knob.

In FIG. 1, the base of a rod antenna 1 is fixed to an antenna base 3 of an antenna support device 2. And the mounting part 4 of the antenna supporting device 2
The vehicle is fixed to a vehicle body 6 such as a garter, a mirror stay, a roof stay, or the like with bolts 7.

In FIG. 1 and FIG. 2, a support plate 11 is fixed to a mounting portion 4 of the antenna support device 2 with screws 12. On one surface of the support plate 11, a plurality of, for example, four or six protrusions 13 are formed as protrusions. The support plate 11 has a circular hole 14 partially cut out therethrough. The support shaft 16 is formed in the hole 14 from the side opposite to the side where the protrusion 13 is formed.
Is inserted. The cross-sectional shape of the support shaft 16 is a partially cut-out circular shape, and has the same shape as the hole 14. Further, a through hole 17 is formed in the center of the support shaft 16. Further, a circular receiving seat 18 is integrally formed at one end of the support shaft 16. A pair of wave washers 19 made of a spring material are fitted on the support shaft 16, and are interposed between the receiving seat 18 and the support plate 11. The wave washer 19 as this elastic member is
The receiving seat 18 is urged in a direction away from the support plate 11, in other words, the supporting shaft 16 formed integrally with the receiving seat 18 is urged to the left in FIGS.

On the other hand, on the side of the support plate 11 on which the projection 13 is formed, an antenna base 3 which is formed by sheet metal processing is arranged. At the upper end of the antenna base 3, a mounting hole 21 for mounting the base of the rod antenna 1 is formed. A circular hole 22 into which the support shaft 16 is inserted is formed. Around this hole 22, a large number of engaging holes 23 are formed as engaging portions capable of engaging with the projections 13 of the support plate 11.

A spacer 26 is arranged outside the antenna base 3, and the surface of the spacer 26 on the antenna base 3 side is formed flat. The spacer 26 has a hole 27 into which the support shaft 16 is inserted. The hole 27 has substantially the same shape as the hole 14 and has a partially cut-out circular shape. A pair of cam surfaces 28 are formed around the hole 27. In addition,
The details of the cam surface 28 will be described later.

A knob 31 is provided at the tip of the support shaft 16.
Is arranged. This knob 31 is
Cylindrical portion 32 and cylindrical portion 3 covering cam surface 28 of
2 is provided with a disk portion 33 for covering
A knob portion 34 is formed so as to protrude from the outer surface of. As shown in FIG. 3, a boss 37 having a screw hole 36 is provided on the inner surface of the disk portion 33 so as to protrude. Further, a pair of protrusions 38 are formed inside the cylindrical portion 32. This protrusion 38
When the antenna support device 2 is assembled, it can slide on the cam surface 28 of the spacer 26.

A pair of wave washers 19, a support plate 11, an antenna base 3, and a spacer 26 are sequentially fitted on the support shaft 16, and a knob 31 is brought into contact with a tip of the support shaft 16 to support a screw 39. The other end of the shaft 16 is inserted into the through hole 17 and screwed into the screw hole 36 of the knob 31. Thus, the antenna support device 2 is assembled. By the way, the support plate 11 is fixed to the vehicle body 6 as described above, and the support shaft 16 is attached to the support plate 11 so as not to rotate and move in the axial direction. The support shaft 16 is constantly urged by the wave washer 19 in the left direction in the drawing, that is, in the direction in which the receiving seat 18 is separated from the support plate 11.

The antenna base 3 is mounted so as to be rotatable and axially movable with respect to the support shaft 16, and the spacer 26 is not rotatable with respect to the support shaft 16. It is movably mounted in the direction.
Further, the knob 31 is mounted so as to be rotatable with respect to the support shaft 16 but not movable in the axial direction.
Therefore, the antenna base 3, the spacer 26, and the knob 31 are urged by the wave washer 19 in a direction approaching the support plate 11, that is, to the left in the drawing.

Next, the cam surface 28 of the spacer 26 and the protrusion 38 sliding on the cam surface 28 will be described. FIG. 4 is an explanatory view of the cam surface, and FIG. 4A is a front view of the knob 31. On the other hand, FIG. 4B is a cross-sectional view of a state in which the cam surface 28 actually formed in the circumferential direction is linearly extended, and the knob 31 has 0 °, 90 °,
Projection 3 when rotated 120 ° and 150 °
8 respectively show sliding positions with respect to the cam surface 28.
In FIG. 4B, the baseline L is
A plane perpendicular to the axis of the support shaft 16 is illustrated. Further, the cam surface 28 extends from the left side (hereinafter, referred to as a start end side) to the right side (hereinafter, referred to as a start end side).
(Referred to as the end side), and are inclined so as to ascend toward the end, and step portions 41 and 42 are formed in the middle on the right side, and a step portion 43 is formed at the end.

The shape of these steps 41, 42, 43 is
The cam surface 28 is slightly inclined to the opposite side to the inclination of the cam surface 28, that is, to the right. On the other hand, the lower surface of the protruding portion 38, that is, the surface in contact with the cam surface 28 has a V-shape, and the left side, that is, the start end side, has the inclination of the cam surface 28 similar to the steps 41, 42, and 43. It is slightly inclined to the opposite side, that is, downward to the right, and the right side, that is, the terminal side is inclined to the upper right with substantially the same inclination as the cam surface 28. A stopper 44 is provided on the right side of the step 43, and the knob 31 is set at 150 °.
It is also possible to configure so as not to be able to rotate beyond.

When the knob 31 is turned from the 0 ° position shown in FIG. 4 (a) to the 150 ° position, the protruding portion 38 is moved to the free position of 0 °, ie, the starting end in FIG. 4 (b). From this, the slider slides on the cam surface 28 to the lock position of 150 °, that is, the terminal end. Due to this sliding, the distance between the knob 31 and the spacer 26 gradually increases. By the way, since the step portions 41, 42, 43 are provided, the left portion of the projecting portion 38 is
When in contact with the knobs 2 and 43, the distance between the knob 31 and the spacer 26 is kept substantially constant. Note that the interval at this time is slightly reduced strictly speaking. Therefore, when the knob 31 is rotated to the positions of 90 °, 120 °, and 150 °, the protruding portion 38 comes into contact with the steps 41, 42, and 43, and the position is stably held.

The operation of the antenna supporting device 2 thus configured will be described with reference to FIGS. FIG. 5 is a cross-sectional view of the antenna support device, where FIG.
(B) is a diagram of the locked state. The illustration of the wave washer 19 is omitted.

In FIG. 5A, when the knob 31 is turned from 0 ° to 150 °, the distance between the spacer 26 and the knob 31 increases, and the knob 31 moves to the right, that is, in the direction away from the support plate 11. I do. This knob 31
Moves together with the screw 39 and the seat 18,
The receiving seat 18 also moves to the right against a wave washer 19 (not shown). Then, the distance between the receiving seat 18 and the support plate 11 decreases. Then, in the locked state shown in FIG. 5B, the gap between the receiving seat 18 and the support plate 11 is eliminated.

In the antenna supporting device 2 configured as described above, in order to change the direction of the rod antenna 1, the knob 31 is set at a free position of 0 °, and the antenna base 3 is moved with respect to the supporting plate 11. Rotate, rod antenna 1
In a predetermined direction. Before the rotation of the support plate 11, the projection 13 of the support plate 11 and the engagement hole 23 of the antenna base 3 are engaged, but when the support base 11 rotates, the antenna base 3 is attached to the wave washer 19. Move a little to the right to engage the hole 2
3 can move over the projection 13 and can be rotated until the engagement hole 23 engages with the next projection 13. In this manner, the engagement and disengagement between the engagement hole 23 and the protrusion 13 is repeated, so that a so-called click motion occurs. Then, when the antenna base 3 rotates to a predetermined position, the knob 31 is turned to the 15th position.
Rotate to the 0 ° lock position. Then, FIG. 5 (b)
Since there is no gap between the support plate 11 and the receiving seat 18 as shown in FIG. 2, the antenna base 3 cannot move to the right side, and the engagement hole 23 cannot go over the projection 13. . Therefore, the antenna base 3 cannot be rotated and is locked.

In a substantially free state in which the knob 31 is rotated by 90 °, a sufficient gap is formed between the support plate 11 and the receiving seat 18 to rotate the antenna base 3. . This gap is smaller than in the free state when the knob 31 is at 0 °, and the click motion is slightly stiffer. In the half-lock state in which the knob 31 is rotated by 120 °, it is difficult to rotate the antenna base 3, but a gap is formed such that the antenna base 3 can be rotated when a strong force is applied. . As a result, in the half-locked state, the direction of the rod antenna 1 is maintained without being affected by the vibration of the vehicle body or the engine, the wind, or the like, while the vehicle is running. When an impact is applied to an obstacle such as a branch, the antenna base 3 supporting the rod antenna 1 is rotated, and the impact on the rod antenna 1 is reduced.
Thereby, damage of the rod antenna 1 can be prevented.

In the embodiment described above, the elastic member is constituted by the wave washer 19, but another elastic member such as a coil spring may be employed instead of the wave washer 19. Further, although the engaging portion is constituted by the engaging hole 23, it may be constituted by a concave portion such as a dent instead of the engaging hole 23. Further, it goes without saying that all the components constituting the antenna support device of the present invention can be made of metal.
6. The spacer 26 and the knob 31 may be made of resin.

[0025]

As described above, the present invention is configured as described above, so that the antenna supporting device can be in a half-lock state. In this state, the gap between the receiving seat and the support plate is considerably small, and the antenna base cannot easily rotate, but can rotate when a strong force is applied. Therefore, when the vehicle to which the antenna is mounted is running normally, the antenna does not change its direction carelessly. However, a strong impact force is applied to the antenna when the vehicle travels off-road such as in Yamano and an obstacle such as a tree branch collides with the antenna or when the antenna collides with the garage when entering the garage. When added, the orientation of the antenna is changed. As a result, the impact applied to the antenna is reduced, and damage to the antenna can be prevented.

Also, since an elastic member is arranged on one side of the support plate and an antenna base and a knob are arranged on the other side, even if the antenna base and the knob are turned, the elastic member is not resilient. No torsional force is applied to the member. Therefore, since no excessive force is applied to the elastic member, its durability is improved.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the antenna support device of the present invention.

FIG. 2 is an exploded perspective view of the antenna support device.

FIG. 3 is a rear view of a knob.

4 (a) is a front view of a knob 31, and FIG. 4 (b) is a sectional view of the cam surface in an unfolded state.

5A and 5B are cross-sectional views of the antenna support device, in which FIG. 5A is a diagram of a free state, and FIG. 5B is a diagram of a locked state.

[Explanation of symbols]

 Reference Signs List 2 antenna support device 3 antenna base 11 support plate 13 protrusion (convex portion) 14 hole 16 support shaft 18 receiving seat 19 wave washer (elastic member) 23 engagement hole (engagement portion) 26 spacer 28 cam surface 31 knob 38 protrusion Part 42 step part 43 end side step part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01Q 1/12-1/26

Claims (1)

(57) [Claims] 1. A support plate having a hole therethrough, and a support shaft inserted into the hole of the support plate and supported by the support plate so as to be non-rotatably movable in the axial direction. A receiving seat provided at one end of the supporting shaft and integrally formed with the supporting shaft, and inserted between the receiving seat and the supporting plate to urge the receiving seat away from the supporting plate; An elastic base that is fitted from the other end of the support shaft, and is supported by the support shaft so as to be rotatable and movable in the axial direction, and fitted from the other end of the support shaft And a spacer which is arranged outside the antenna base and is supported by the support shaft so as to be non-rotatable and movable in the axial direction. The spacer is rotatably supported by the other end of the support shaft. A knob, which is inserted from the receiving seat and whose tip is the knob And a threaded means screwed, the support plate and the convex portion in one of the antenna base is, engaging portions formed of recesses or holes are formed in the other,
The convex portion and the engaging portion can be engaged when the antenna base moves to the support plate side, and the convex portion and the engaging portion constitute a click mechanism. A protrusion is formed on one of the knobs, and a cam surface on which the protrusion slides is formed on the other, and the cam surface is inclined from the start end toward the end, and And at least one step provided in the middle, and a step on the terminal side provided at the end, and the state where the protruding part is located at the start end of the cam surface. When the knob is rotated in one direction and the protrusion is slid toward the end of the cam surface, while the protrusion is sliding on the cam surface other than the step portion, a spacer is provided. The distance between the knob and the knob gradually increases, and the protrusion slides on the step And when that is, an antenna supporting device, wherein the cam surface is formed so that the distance between the spacer and the knob hardly expanded.