JPH028405Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a rod antenna raising and lowering device that automatically raises and lowers a rod antenna installed on the roof of a car, for example, and in particular, the invention relates to a rod antenna raising and lowering device that automatically raises and lowers a rod antenna installed on the roof of a car, etc. The present invention relates to an improvement in means for converting the power into antenna up-and-down operation force.

[Conventional technology]

As a conventional rod antenna raising/lowering device of this kind, the base end of the rod antenna is rotatably attached to the roof of a car, for example, and the antenna is constantly biased to be erected by a spring force, and when not in use, the rod antenna is There is a device in which a rod antenna is horizontally locked on a roof against a spring force, and when in use, by releasing the locking state, the rod antenna is made to stand up on its own by the spring force. In such conventional devices, the rod antenna stands up on its own due to the force of the spring, which is dangerous if the height of the roof of the automobile is too high. Furthermore, when not in use, the rod antenna must be manually lowered and locked in a horizontal position on the roof, which has the disadvantage of being cumbersome to operate. Recently, in order to eliminate these drawbacks, the rotational force of the motor has been used to
An electric rod antenna raising and lowering device that lowers and lowers the rod antenna relatively slowly through a speed reduction mechanism has been devised and put into practical use.

[Problem that the invention attempts to solve]

However, the above electric rod antenna raising and lowering device has the following problems to be solved. That is, since the speed reduction mechanism for slowing down the rotation of the motor uses a speed reduction mechanism that is a combination of ordinary gears, the speed reduction mechanism becomes quite large-scale. Therefore, it is difficult to mount the speed reduction mechanism on the roof of an automobile, and it also causes problems when the automobile is running at high speed, and is not desirable in terms of appearance.

Therefore, the present invention has developed a rod antenna that can be automatically raised and lowered, is small and lightweight, can be easily installed on the roof of a car, and does not pose a problem even when the car is running at high speed. The purpose is to provide a levitation device.

[Means for solving problems]

The present invention is characterized by taking the following measures in order to solve the above problems and achieve the objectives. That is, in the rod antenna hoisting device of the present invention, the center hole of a spur gear is fitted into the eccentric shaft cylinder of a cam gear that is rotationally driven by an electric mechanism, and the spur gear is eccentrically rotated together with the eccentric shaft cylinder. An internal gear having teeth on its inner circumferential surface that can mesh with the teeth of the spur gear is disposed so that the eccentrically rotating spur gear rolls along the inner circumferential surface. Further, an engaging element is provided integrally with the spur gear, and an antenna operation mechanism having an engaging part in a peripheral area that engages with the engaging element is rotatably provided, so that the antenna can be operated as the spur gear rolls. The antenna is characterized by the ability to raise and lower the antenna by rotating the mechanism.

[Effect]

By taking the above measures, the rotation of the motor is sufficiently decelerated due to the rolling of the spur gear within the limited narrow space within the internal gear.
It is converted into antenna raising and lowering operation force.

〔Example〕

FIGS. 1a, b, c to 7 are diagrams showing an embodiment in which the present invention is applied to a roof antenna for an automobile. FIGS. 1a, b, and c are views showing the overall configuration of the rod antenna undulating device, in which a is a side view, b is a rear end view, and c is a top view. As shown in FIGS. 1a, b, and c, this device is installed in a fixed part 10 that accommodates an electric mechanism and a deceleration mechanism in a first case that is fixed to the roof of an automobile. A movable part 20 housing an antenna operating mechanism in a second case joined to the movable part 20 is rotatably supported by a shaft support 30. Reference numeral 40 in FIG. 1 is a rod antenna in which a plurality of rod antenna elements 41, 42, .

FIG. 2a is a partially cutaway side view of FIG. 1a, and FIG. 2b is a sectional view taken along line BB in FIG. 1a. FIG. 3 is an exploded perspective view of the main parts of the device. As shown in FIGS. 2a, b and 3, the first case 11 of the fixed part 10 is
A and a cylindrical part 11B, the cylindrical part 11B
A drive motor 12 is housed inside. A worm 13 is attached to a rotating shaft introduced into the disc portion 11A of the motor 12. This warm 1
3 meshes with a large diameter portion 15a of a two-stage worm gear 15 rotatably supported by a parallel pin 14. Small diameter portion 15 of this two-stage worm gear 15
A tooth portion 16b of a cam gear 16 having an eccentric shaft cylinder 16a on one side meshes with b. This cam gear 16 is rotatably provided in the disk portion 11A, and the center hole 17a of the spur gear 17 is fitted into the eccentric shaft cylinder 16a, so that the cam gear 16 performs eccentric rotation together with the eccentric shaft cylinder 16a. It's summery. On the outer periphery of this spur gear 17, the above-mentioned spur gear 17
An internal gear 18 having a tooth portion 18b on its inner circumferential surface that can mesh with the tooth portion 17b is disposed with a predetermined gap maintained therebetween. Thus, this internal gear 18 causes the eccentrically rotating spur gear 17 to roll along its inner peripheral surface. Note that a protrusion 18a is provided on one side of the internal gear 18, and this protrusion 18a is fitted into a recess of the first case 11 in which the worm gear 15 is accommodated. In this way, the internal gear 18 is fixed to the case 11 in a non-rotatable state. The spur gear 17
An engagement plate 19 is integrally fixed to one side of the plate 19 by, for example, adhesive or other means. This engagement plate 1
9 has an engaging element 19a on a part of its outer peripheral surface. The drive motor 12 to the worm gear 15 constitute the electric mechanism of the present invention, and the cam gears 16 to 15 constitute the electric mechanism of the present invention.
The engagement plate 19 constitutes the main speed reduction mechanism of the present invention.

The second case 21 of the movable part 20 is a disk part 21
A and an antenna holding part 21B, and the peripheral edge of the disk part 21A is connected to the first case 1 on the fixed part side.
It is rotatably fitted to the outer circumferential portion of the disk portion 11A of No. 1. A circular recess 22 in which the engagement plate 19 can be accommodated is formed at the center of the inner surface of the disk portion 21A. An engaging portion 22a that engages with the engaging element 19a is formed in a part of the outer peripheral wall of the circular recess 22. Thus, the rotational force of the engagement plate 19 due to the rolling of the spur gear 17 is transferred from the engagement element 19a to the engagement portion 2.
The signal is transmitted to the disc portion 21A of the case 21 via the cable 2a. When the disk portion 21A rotates, the antenna holding portion 21B also rotates, and the holding angle of the antenna changes. The disc portion 21A of the second case 21, particularly the engaging portion 22a and the antenna holding portion 21B constitute the antenna operating mechanism of the present invention.

The shaft support 30 consists of a bolt 31 and a nut 32. The bolt 31 is attached to the second case 21
The center of the disk portion 21A in the cam gear 16
center, the disk portion 1 in the first case 11
It passes through the center of 1A, and a nut 32 is screwed into the penetrating end.

Next, the operation of this device configured as described above will be explained in the fourth section.
This will be explained with reference to FIGS. 7 to 7. When the drive motor 12 is rotated in a predetermined direction, the worm 13 rotates in the direction of the arrow in FIG. 3, and the worm gear 15 meshing with the worm 13 rotates in the direction of the arrow. Then, the cam gear 16 rotates in the direction of the arrow. Therefore, the eccentric shaft cylinder 16a is
From position a shown in the solid line in the figure, b shown in broken line sequentially,
It rotates through states c and d. Therefore, the spur gear 17, whose center hole 17a is fitted into the eccentric shaft cylinder 16a, rotates eccentrically as shown in FIGS. 5A to 5D. Then, the tooth portion 17b of the spur gear 17 is replaced by the tooth portion 18b of the internal gear 18 disposed on the outer periphery of the spur gear 17.
The internal gear 18 rolls along the inner circumferential surface of the internal gear 18 while being partially engaged with the internal gear 18. Therefore, the engagement plate 19 integrated with the spur gear 17 also rolls together with the spur gear 17. In this case, the spur gear 17 and the engagement plate 19 will revolve in the direction of the solid line arrow while rotating in the direction shown by the broken line arrow in FIG.

FIG. 6 is a diagram showing the movement of the engagement plate 19 that performs the above-mentioned rolling motion. As shown in FIG.
As the entire engagement plate 19 rolls together with the spur gear 17, it first moves backward as indicated by arrows X, Y, and Z in the figure, then rotates by a predetermined angle θ, and then moves forward again. This will end the cycle. The above operation is performed every time the cam gear 16 rotates once. The rotation angle θ is determined by the difference in the number of teeth between the spur gear 17 and the internal gear 18. For example, if the number of teeth of the spur gear 17 is 62 and the number of teeth of the internal gear 18 is 66, the rotation angle will be about 23 degrees, which corresponds to the difference between them, ie, 4 teeth. Also spur gear 17
The number of teeth is 60, and the number of teeth of internal gear 18 is 65.
, the difference is a rotation angle of 30°, which corresponds to 5 teeth. The example in FIG. 6 shows the latter example. In addition, the reduction ratio in the former case is 1:16.5,
In the latter case, the reduction ratio is 1:13.

FIG. 7 is a diagram showing changes in the rotation angle in the circumferential direction as viewed from the center point of the engagement plate 19 shown in FIG.
It is a diagram which shows the relationship of the rotation angle of a. As is clear from FIG. 7, the engaging element 19a repeats intermittent rotation. As is clear from what has already been explained, such intermittent rotation is caused by the movement of one point of the spur gear 17 that is in contact with the inner periphery of the internal gear 18. There is almost no movement in the direction, and the internal gear 18 is used exclusively.
It performs an opening/retreating operation from the center, then changes to a circumferential movement, and then performs an approaching forward movement. Therefore, at the beginning and end of the operation, there is almost no rotation in the circumferential direction, and as a result, a step operation as shown in FIG. 7 is performed.

Thus, the second case 21
The antenna 4 rotates intermittently in response to the rotational movement of the antenna 4.
0 rises by a predetermined angle. When the motor 12 finally reaches a state where it stands upright at a substantially right angle to the roof of the vehicle, a limit switch (not shown) operates to stop the rotation of the motor 12. Therefore, the antenna 40 is set up in a substantially vertical state. The upright angle of the antenna will be approximately 70 degrees if the rotation angle of one step is set to approximately 23 degrees.

When the antenna 40 is laid down on the roof of the automobile when not in use, the motor 12 may be rotated in the opposite direction to that in the above case. In this case, the operation is performed in the opposite direction to that in the above case, and when the rod antenna 40 is lowered onto the roof of the automobile, a limit switch (not shown) is activated and the lowering operation is stopped.

As described above, according to this embodiment, the rod antenna 40 can be automatically raised and lowered at a predetermined speed. Therefore, there is no danger associated with conventional spring-type devices, and the operation is simple. In particular, since a speed reduction mechanism using an internal gear is used, the speed reduction mechanism can be made small and does not require much installation space. Therefore, it can be easily and stably mounted on the roof of an automobile, and there is no problem even when the automobile is running at high speed. In addition, in conventional spring-type devices, there was a risk that the antenna setting angle would change due to wind pressure, but in this device, due to the mechanical relationship between the worm 13 and the worm gear 15, the antenna can be set upright. There is no possibility that the angle will change due to external force.

Note that the present invention is not limited to the above embodiments. For example, in the embodiment described above, the spur gear 17 and the engagement plate 19 are provided separately and are integrated by adhesive or other means, but they may be integrally molded in advance. Furthermore, in the above embodiment, the antenna operating mechanism was integrally molded as the second case 21, but the engaging part 22a, the antenna holding part 21B, etc. are provided separately, and these are integrally molded into the second case. It may also be possible to combine them. It goes without saying that various other modifications can be made without departing from the gist of the present invention.

[Effect of idea]

According to the present invention, the rotation of the motor is sufficiently decelerated by the rolling of the spur gear in the limited narrow space inside the internal gear, and is converted into the antenna hoisting operation force, so the rod antenna is automatically hoisted and raised. To provide a rod antenna hoisting device that can be operated, is small and lightweight, can be easily installed on the roof of a car, and does not pose a problem even when the car is running at high speed.

[Brief explanation of drawings]

Figures 1a, b, c to 7 are diagrams showing an embodiment in which the present invention is applied to an automobile roof antenna.
Figures 1a, b, and c are diagrams showing the overall configuration of the rod antenna hoisting device, where a is a side view, b is a rear end view,
2c is a top view, FIG. 2a is a partially cutaway side view of FIG. 1a, and FIG.
A sectional view, FIG. 3 is an exploded perspective view of the main parts of this device, FIGS. 4 to 7 are diagrams for explaining the operation of this embodiment, and FIGS. 4 and 5 show the movement of the cam gear and spur gear. FIG. 6 is a diagram showing the movement of the engagement plate, and FIG. 7 is a diagram showing the relationship between the rotational speed of the engagement element and the rotational speed of the cam gear. 10... Fixed part, 11... First case, 12
... Drive motor, 13 ... Worm, 14 ... Parallel pin, 15 ... Worm gear, 16 ... Cam gear, 16a ... Eccentric shaft cylinder, 17 ... Spur gear, 18
...Internal gear, 19...Engagement plate, 19a
...Engagement element, 20...Movable part, 21...Second case, 22...Circular recess, 22a...Engagement part, 3
0...Axis branch, 31...Bolt, 32...Natsuto.

Claims (1)

[Scope of utility model registration request] An electric mechanism consisting of a drive motor, a worm provided on the rotation shaft of the drive motor, a worm gear meshing with the worm, etc., and configured so that the rotation angle does not change due to external force, and an eccentric driven to rotate by this electric mechanism. A cam gear with a shaft cylinder, a spur gear whose center hole is fitted into the eccentric shaft cylinder of the cam gear and rotates eccentrically together with the eccentric shaft cylinder, and a tooth part that can mesh with the teeth of the spur gear. an internal gear disposed so as to cause the spur gear having eccentric rotation on the peripheral surface to roll along the inner peripheral surface; and an internal gear disposed integrally with the spur gear rolling by the internal gear. and an antenna operating mechanism that has an engaging portion in a peripheral area that engages with the engaging element and rotates as the spur gear rolls to operate the antenna up and down. Rod antenna hoisting device.