JPH0145128Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention relates to an antenna lifting device for a vehicle antenna used in an automobile or the like, and particularly relates to a friction transmission device in this antenna lifting device.

(Prior Art) An antenna lifting device for a vehicle antenna of this kind that has already been proposed is constructed as shown in Figs.
Publication No.).

That is, in FIG. 1, an outer cover 3 is attached to a substrate 2 that is integral with a case body 1 formed to extend a rod antenna so as to surround the outer cover 3. A drum storage cover 4 is provided on the case body 1 located so as to clearly surround a driven side drum 7, which will be described later, and the like. Further, a support shaft 5 is mounted approximately at the center of the substrate 2 so as to hold the outer cover 3 and the drum storage cover 4 together, and connects the inside of the substrate 2 and the drum storage cover. A pipe shaft 6 having a flange 6a is fitted onto the support shaft 5 located between the inner side of the pipe shaft 4 and the inside of the pipe shaft 4. Furthermore, on the inner end surface of the flange 6a,
A driven side drum (also referred to as a driven side clutch plate) 7 is fitted so as to be rotatable. It is composed of an antenna cord 10 that expands and contracts the housed antenna and an outer drum 11 that houses the cord.

That is, in the driven drum 7, an antenna cord 10 for expanding and contracting the antenna is wound around an inner drum 9 having a groove 9a, and one end 10a of the antenna cord 10 is hooked to the groove 9a. The outer drum 11 is placed on the outside of the inner drum 9.
It is installed so as to be integrated with the

In other words, the driven side drum 7 includes the inner drum 9,
It consists of an antenna cord 10 that extends and contracts the antenna outward from the pillar portion of the vehicle body, and an outer drum 11.

That is, the grooves (vertical grooves in the axial direction) of the inner drum 9
9a is an antenna cord 1 that expands and contracts the antenna.
A locking portion (one end) 10a of the antenna cord 10 is engaged as a stopper, and the antenna cord 10 is wound around the inner drum 9 located inside the outer drum 11. The other end is connected to an antenna (not shown) housed in a pillar of the vehicle body. Further, when the antenna is extended outward (forward rotation), the antenna cord 10 loosens and the outer drum 11
This outer drum 11 is in frictional contact with the inner circumferential surface of the outer drum 11.
When the antenna cord 10 rotates forward, the inner drum 9 also rotates while the antenna cord 10 is unwound.

On the other hand, when the antenna is housed in the pillar of the vehicle body, when the inner drum 9 is rotated in the opposite direction by the drive motor 16, the antenna cord 10 is rotated in the opposite direction.
is wound around the inner drum 9 as shown in FIG.
actuates the changeover switch of the drive motor 16 and stops the drive motor 16, but since the driven drum 7 is rotating under the load of inertia, the clutch portion 8 Each pair of concave portions 19a, 19b engaged with each pair of engagement protrusions 12a, 12b are configured to engage and disengage.

Therefore, by rotating forward or backward around the tube shaft 6, the driven drum 7 winds up or unwinds the antenna cord 10, and moves the antenna connected to the antenna cord 10 outward. It can be extended or stored within the pillar of the vehicle body. On the other hand, on the clutch portion 8 of the outer drum 11, as shown in FIGS.
2a and 12b are formed to protrude inwardly at different circumferential antipodal positions, and each of these engaging protrusions 1
A ring plate-shaped elastic body 13 made of a soft rubber material is adhered to the inner surfaces other than 2a and 12b. A worm wheel 14 is rigidly mounted on one end of the tube shaft 6.
is connected via a worm gear 15 to an output shaft of a drive motor 16 that rotates in forward and reverse directions. Furthermore, a clutch wheel 17 is mounted on the tube shaft 6 at a position close to each of the engaging protrusions 12a, 12b, for example.
Although it slides in the direction of the tube axis like a spline, it is mounted so that it rotates integrally with the tube shaft 6, and between the clutch wheel 17 and the worm wheel 14 there is a A coil spring 18 resiliently presses the clutch wheel 17 against the clutch portion 8. Furthermore, on the side surface of the clutch wheel 17 where the respective engaging protrusions 12a and 12b are located,
A pair of recesses 19a and 19b that engage with each of the engagement protrusions 12a and 12b are formed to be removable (see FIGS. 2 and 4).

Therefore, when the above-described antenna lifting/lowering device drives the drive motor 16, the drive motor 16
The tube shaft 6 is rotated by rotating the worm wheel 14 that meshes with the worm gear 15.
As shown in FIG.
2b by the elasticity of the elastic body 18, thereby rotating the driven drum 7 in the forward or reverse direction, thereby causing the antenna cord 1 to be wound around the driven drum 7.
The antenna can be rolled up or unwound to extend the antenna outward, or shortened and stored within the pillar of the vehicle body.

On the other hand, when the driving of the drive motor 16 is stopped, since the inner drum 9 of the driven drum 7 is rotating due to inertia as described above, each pair of engagement protrusions 12a, 12b of the clutch portion 8 and The coil spring 18 is engaged with and disengaged between each pair of concave portions 19a and 19b against the elastic force of the coil spring 18. That is, when the clutch is operated, the clutch wheel 17 once slides rightward in the axial direction of the tube shaft 6 in FIG. Because it has been
Again, this clutch wheel 17 moves back and engages the other engaging protrusions 12a, 12b with the other concave portion 19.
a and 19b are engaged.

(Problem to be solved by the invention) However, the antenna lifting device described above,
When engaging the clutch portion 8, it is not only difficult to sufficiently suppress the clutch sound, but also as the elastic body 13 wears out over time or material fatigue occurs, the clutch sound gradually becomes louder. However, there are drawbacks such as the fact that these clutch sounds cause discomfort to the driver through the pillars of the vehicle body through which the antenna is passed.

On the other hand, although a friction transmission clutch incorporating a friction transmission clutch has been proposed, this has a structure in which the driven side drum is driven via another transmission gear mechanism, so the structure is difficult. becomes complicated,
It is difficult to incorporate into a compact size, assembly and adjustment are troublesome, maintenance and inspection are not easy, and furthermore, it is difficult to provide at low cost.

In order to eliminate the above-mentioned drawbacks, the present invention includes fitting the outer drum of the driven side drum onto the tube shaft, drilling a plurality of holes at the base of the outer drum, and filling each hole with lubricant. Both thrust members pressed by elastic bodies are provided on both sides of the outer drum where each of the through holes are located, and the outer drum is rotated while sandwiching and frictionally pressed against the outer drum to silently install the antenna. The present invention provides an antenna lifting and lowering device that is capable of lifting and lowering the antenna.

[Structure of the idea]

(Means and effects for solving the problem) The present invention provides an antenna lifting device for a vehicle antenna in which the antenna is raised and lowered by rotating a driven drum to wind up or unwind the antenna cord. A support shaft is mounted on the base plate, a pipe shaft having a flange is fitted onto this support shaft, and a washer, a thrust member, the outer drum of the driven side drum, the thrust member, and these are pressed onto the flange of the pipe shaft. A plurality of through holes are bored in the outer drum which is held between the two thrust members, and a lubricant is filled in each of the through holes so that the frictional transmission is carried out quietly. The driven drum is configured to rotate.

(Embodiment of the invention) Hereinafter, the present invention will be described with reference to an illustrated embodiment.

In addition, the present invention will be described with the same reference numerals attached to the same constituent members as in the above-described specific example.

In FIGS. 1, 5 to 7, reference numeral 1
is a case body formed to extend a rod antenna, and a board 2 is integrally provided in this case main body 1, and this board 2 includes:
An outer cover 3 is attached so as to surround it from the outside, and a drum housing cover 4 is provided on the case body 1 located on the opposite side of the outer cover 3 so as to house the driven side drum 7 from the outside. There is. Further, a support shaft 5 is mounted approximately in the center of the substrate 2 so as to hold the outer cover 3 and the drum storage cover 4 together, and the support shaft 5 is mounted on the substrate 2 in a manner that it holds the outer cover 3 and the drum storage cover 4 together. As shown in FIG. 5, a tube shaft 20 having a flange 20a is rotatably fitted into the support shaft 5 located between the two through a shaft sleeve 21. Furthermore, a worm wheel 14 is firmly mounted on one end of the tube shaft 20, and a worm gear 15 is connected to the worm wheel 14 so that the power of a drive motor 16 (see FIG. 1) can be transmitted thereto. are engaged.

On the other hand, as shown in an enlarged view in FIG. 7, a plurality of locking holes 22 are bored in the flange 20a of the tube shaft 20 where the driven side drum 7 is located, and each of the locking holes The above flange 2 where 22 is located
On the inner surface of 0a, there is a disc-shaped stop washer 2.
3 is attached. Further, a plurality of engagement protrusions 23a are formed on the stop washer 23 so as to project out laterally, and each of the engagement protrusions 23a is adapted to engage with each of the above-mentioned engagement holes 22. . Further, a ring plate-shaped thrust member 24 is interposed between the stop washer 23 and the outer drum 11 of the driven drum 7.
The outer drum 11 located on one side of the drum 4 has a sixth
As shown in the figure, a plurality of through holes 25 are formed to form radial long holes, and each of the through holes 25
The inside is filled with a lubricant 26 such as, for example, grease. Furthermore, on the other side of the outer drum 11 where each of the through holes 25 are located, a ring plate-shaped thrust member 27 and a presser washer 28 are attached so as to seal each of the through holes 25, These stop washer 23 and thrust member 2
4. The outer drum 11, the thrust member 27, and the presser washer 28 are made of an elastic body 29 made of a disc spring, for example.
The elasticity of the flange 20a of the tube shaft 20 presses against the side surface of the flange 20a of the tube shaft 20.

The pressing force of the elastic body 29 can be adjusted by means of two adjustment nuts (double nuts) 30 threaded onto the threaded portion 20b of the tube shaft 20.

In this way, the outer drum 11 of the driven drum 7 is secured to each locking hole 22 of the flange 20a, the engagement protrusion 23a of the washer 23, the pair of thrust members 24, 27, the presser washer 28, and the elastic body 29. When an overload is applied to the drum 11, each engagement protrusion 23a of the stop washer 23 engages with each engagement hole 22. It engages and disengages from the clutch to act as a clutch.

Therefore, when the drive motor 16, which rotates in the forward direction, is driven, the drive motor 16 rotates the worm wheel 14 that meshes with the worm gear 15, thereby rotating the tube shaft 20 that is integral with the worm wheel 14. , a pair of thrust members 24, 27, a presser washer 28, and an elastic body 29
rotates the outer drum 11 of the driven drum 7. As a result, the driven drum 7 is rotated forward or backward, and the antenna cord 10 wound around the driven drum 7 is wound up or unwound. The antenna connected to the vehicle is extended outward or shortened and housed within the pillar of the vehicle body.

On the other hand, when a load is applied to the outer drum 11 of the driven drum 7, each engagement protrusion 23a of the stop washer 23 engages and disengages from each engagement hole 22 to perform a clutch action, and each The thrust members 24 and 27 begin to freely rotate, and at this time, there is no risk of sound being absorbed by the lubricant 26 and producing a clutching sound.

[Effect of idea]

As described above, according to the present invention, in the antenna lifting device for a vehicle antenna in which the antenna is raised and lowered by rotating the driven drum 7 and winding or unwinding the antenna cord 10, the substrate of the case body 1 is provided. A support shaft 5 is mounted on the support shaft 5, and a tube shaft 20 having a flange 20a is fitted onto the support shaft 5. The washer 23, the thrust member 24, and the outside of the driven side drum 7 are fixed to the flange 20a of the tube shaft 20. A drum 11, a thrust member 27, and an elastic body 28 for pressing these are provided in order from the outside, and a plurality of through holes 25 are bored in the outer drum 11 held between the thrust members 24 and 27, and each of the through holes is Since the lubricant 26 is filled inside the clutch 25, it can operate quietly without producing unpleasant noises due to clutch noise, and it can be assembled on the support shaft 5 all at once.
The entire device can be constructed to be small in bulk, and since it is simple in structure, assembly and adjustment are easy, and furthermore, mass production can save labor.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a half cross section of an antenna lifting device that has already been proposed, and FIG.
An enlarged cross-sectional view of chain circle A section in the figure, and FIGS. 3 and 4 are front views of a driven side drum and a clutch wheel that opposes it, which are incorporated in the antenna elevating device.
FIG. 5 is a sectional view showing the main parts of the antenna lifting device according to the present invention, and FIG. 6 is a chain line B-B in FIG.
7 is an enlarged sectional view of the chain circle C portion in FIG. 5. 2... Board, 5... Support shaft, 7... Driven side drum, 11... Outer drum, 20... Tube shaft, 22...
Locking hole, 23... Lock washer, 24... Thrust member, 25... Through hole, 26... Lubricant, 27...
...Thrust member, 28... Presser washer, 29...
...Elastic body.

Claims (1)

[Claims for Utility Model Registration] 1. In an antenna lifting device for a vehicle antenna, which raises and lowers the antenna by rotating a driven drum to wind up or unwind the antenna cord, A tube shaft having a flange is fitted onto this support shaft, and a washer, a thrust member, an outer drum of the driven side drum, a thrust member, and an elastic body that presses these are visible from the outside. An antenna elevating device characterized in that a plurality of through holes are formed in the outer drum which are provided in sequence and sandwiched between the two thrust members, and each of the through holes is filled with a lubricant. 2. The antenna lifting and lowering device according to claim 1 of the utility model registration, characterized in that the elastic body is a disc spring.