JPH0320603Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a telescopic fitting tube driving device, and more particularly, to a telescopic fitting tube driving device that shortens and extends a telescopic fitting tube.

BACKGROUND ART Conventionally, for example, there are systems in which a telescopic fitting tube is used as an antenna or a corner pole of an automobile, and the antenna or corner pole is moved up and down by driving the telescopic fitting tube electrically.

The conventional telescopic fitting tube drive device described above, for example, transmits the rotation of a worm gear provided on a motor rotating shaft to a helical gear, and uses a plurality of spur gears to decelerate the rotation of the helical gear and transmits it to a pulley. do. A flexible tube is wrapped around the pulley. One end of this tube is fixed to a pulley, and the other end is fixed to the tip of the telescopic fitting tube. When the pulley rotates and the tube is wound up, the telescopic fitting tube expands and contracts, and when the pulley rotates in the opposite direction and the tube is fed out, the telescopic fitting tube expands.

Further, the pulley is provided with a slip mechanism. As a result, even if the motor is rotated even after the telescopic fitting tube has completed its shortening, the rotation is absorbed by the slip mechanism.

Problems to be Solved by the Invention In the above-mentioned conventional device, a slip mechanism is provided to allow the motor to rotate even after the telescopic fitting tube has been shortened, so noise is generated when the slip occurs, and the motor and gears There were problems such as a heavy load, reduced durability, and high power consumption.

The present invention has been developed in view of the above points, and is capable of reliably stopping the telescopic fitting tube at the same position at all times, and does not place any burden on the motor when the telescopic fitting tube is shortened. The purpose is to provide a driving device.

Means for Solving the Problems The present invention involves wrapping a flexible member whose end is connected to the innermost tube of the telescopic fitting tube into a winding section, and rotating the winding section by driving it with a motor. In a telescopic fitting tube drive device that winds up and sends out a flexible member to shorten and extend a telescopic fitting tube, a magnet provided inside the innermost tube of the telescopic fitting tube and a telescopic fitting tube are used. A reed switch that turns on when a magnet comes close to the fitting tube when it is finished shortening, and a reed switch that stops the motor when the reed switch is turned on and drives the motor when the telescopic fitting tube is shortened or extended. It is equipped with a motor drive device for shortening and expanding.

Function Since the end of the flexible member is connected to the innermost tube (innermost tube) of the telescopic fitting tube, the end of the downward movement of the innermost tube is detected when the telescopic fitting tube is at its shortest position. This can be confirmed by

The magnet moves together with the innermost tube of the telescopic fitting tube, and the reed switch is disposed at a position where the magnet approaches when the innermost tube has finished its downward movement. Therefore, the reed switch is closed when the innermost tube has finished its downward movement, and the end of the downward movement of the innermost tube is directly detected.

The motor drive device drives the motor to expand, contract, and extend the telescopic fitting tube, and stops the motor when the reed switch is closed.

Since the magnet is provided inside the innermost tube, the magnet guides the flexible member connected to the innermost tube inside the innermost tube.

Embodiment FIG. 1 is a plan view of an embodiment of the device of the present invention, and FIG.
The figure shows a - sectional view of the device shown in the first figure.

In FIGS. 1 and 2, 1 is a motor, which is fixed to a case 3. In FIG. A sun gear 4 is fixed to the rotating shaft 1a of the motor 1, and rotates clockwise or counterclockwise when the motor 1 is driven. The number of teeth provided on the outer periphery of the sun gear 4 is, for example, "36".

Planetary gears 5, 6, and 7 are meshed with the outer periphery of the sun gear 4, respectively. The number of teeth of each of the planetary gears 5, 6, and 7 is, for example, "32".

The planetary gears 5, 6, and 7 mesh with a fixed gear 8 and a driven gear 9, which are internal gears, respectively. The fixed gear 8 and the driven gear 9 are made to have the same distance between their axes with the planetary gears 5, 6, and 7 through their respective transfers.

The fixed gear 8 is ring-shaped and has, for example, 102 teeth, and is fitted into the stepped portion 3a of the case 3 and is elastically fixed by a wave spring 15.

The driven gear 9 is ring-shaped and has, for example, 99 teeth. The driven gear 9 is rotatably engaged with the fixed gear 8. A pulley 12 as a winding portion is integrally formed on the driven gear 9. The pulley 12 is provided with a spiral groove 12a for approximately two turns on the outer periphery, and a flexible tube 13 made of resin such as nylon is inserted into this groove 12a and wound around the pulley 12. Ru. Groove 1 of pulley 12
The end portion of the tube 2a is a fixed portion 12b, to which one end 13a of the flexible tube 13 is fixed. The other end 13b of the flexible tube 13 is guided into the telescopic fitting tube 14 and fixed to the inner tip of the innermost tube (innermost tube) 14b of the telescopic fitting tube 14. Here, in the telescopic fitting tube 14, the innermost tube 14b is the uppermost stage in the most extended state, and the telescopic fitting tube 1
The shortening of the tube 4 is completed when the innermost tube 14b moves downward. The base portion 14a of the telescopic fitting tube 14 is fixed to the case 3, as shown in FIG.

Here, when the motor 1 is driven by the motor drive device 2 and the sun gear 4 rotates clockwise in FIG. 1, the planetary gears 5, 6, and 7 rotate counterclockwise and clockwise. Each of the planetary gears 5, 6, and 7 meshes with a fixed gear 8 and a driven gear 9 having different numbers of teeth, and the fixed gear 8 is elastically fixed to the case 3. Therefore, the driven gear 9 rotates counterclockwise with respect to the fixed gear 8 due to the difference in the number of teeth (the difference in the number of teeth between the driven gear 9 and the fixed gear 8). At this time, the driven gear 9 relative to the sun gear 4
The rotational reduction ratio of is "126.5". Due to the counterclockwise rotation of the driven gear 9, the flexible tube 1
3 is wound up by the pulley 12, the tip of the innermost tube 14b is pulled down at the other end 13b of the flexible tube 13, and the telescopic fitting tube 14 is shortened. Further, a magnet 11 is provided inside and below the innermost tube 14b, and when the telescopic fitting tube is shortest, the magnet 1
A reed switch 10 is provided at a position opposite to the reed switch 1. Reed switch 10 is magnet 11
The switch is turned on by the magnetic force. For this reason,
When the downward movement of the innermost tube 14b is completed, that is, when the telescopic fitting tube 14 is shortest, the reed switch 10 is turned on.

The motor drive device 2 stops the motor 1 when the reed switch 10 is turned on, that is, when the telescopic fitting tube 14 is in the shortest position.

Therefore, no noise is generated after the shortening operation is completed, and a large load is not placed on the motor 1 and the gears 4 to 9, thereby improving their durability.

In this way, it is possible to directly detect the downward movement of the innermost tube 14b, which is a guideline for the most shortened state of the flexible tube 13. The switch can be operated reliably at the shortest position of the telescopic fitting tube 14 without being affected by misalignment, and the reliability of the device is improved.

The magnet 11 is attached to a predetermined position on the innermost tube 14b, and the reed switch 10 is attached to the magnet 1 in the state where the telescopic fitting tube 14 is shortest.
It is only necessary to attach the magnet 11 and the reed switch 10 to the case 3 so as to face the magnet 11 and the reed switch 10, and the workability of positioning and attaching the magnet 11 and the reed switch 10 is improved.

In addition, as shown in FIG. 1, the magnet 11 attached inside the innermost tube 14b or the innermost tube 14b
Since the flexible tube 13 attached to the flexible tube 13 is guided, buckling of the flexible tube 13 can be prevented.

Note that a wire or the like may be used instead of the flexible tube as the flexible member, and the driven gear 9
and the pulley 12 may be separate bodies, and are not limited to the above embodiment.

Effects of the invention As described above, according to the invention, a reed switch and a magnet are provided to stop the motor after the telescopic fitting tube is shortened, so no noise is generated after the shortening operation is completed. This does not place a large burden on the motor and gears, improving their durability, and furthermore, the telescopic fitting tube can always be reliably stopped at the same position.

In addition, since it is possible to directly detect the downward movement of the innermost pipe, which is a guideline for the most shortened state of the telescopic fitting pipe, the telescopic fitting is not affected by the expansion and contraction of the flexible member or the displacement of the fixed part. The switch operation at the shortest position of the mating pipe is ensured, and the reliability of the telescopic mating pipe drive device is improved.

Further, the workability of positioning and attaching the magnet and reed switch is good, and the manufacturing cost of the product can be reduced.

Furthermore, the magnet attached to the innermost tube of the telescopic fitting tube prevents the flexible member from buckling, and has the advantage of ensuring reliable expansion and contraction of the telescopic fitting tube.

[Brief explanation of drawings]

Fig. 1 is a plan view of one embodiment of the device of the present invention;
The figure is a cross-sectional view of the apparatus of FIG. 1. 1...Motor, 2...Motor drive device, 10...
...Reed switch, 11... Magnet, 12...
...Pulley, 13... Flexible tube, 14... Telescopic fitting tube.

Claims (1)

[Claims for Utility Model Registration] A flexible member whose end is connected to the innermost tube of the telescopic fitting tube is wound around a winding part, and the winding part is driven by a motor to rotate. A telescopic fitting tube drive device that winds up and sends out a flexible member and shortens and extends the telescopic fitting tube, comprising: a magnet provided inside the innermost tube of the telescopic fitting tube; a reed switch that is turned on when the magnet comes close to the reed switch when the telescopic fitting tube is shortened; and when the motor is driven to shorten and extend the telescopic fitting tube and the reed switch is turned on; A telescopic fitting tube drive device comprising: a motor drive device for stopping the motor; and a motor drive device for stopping the motor.