JPH0410319A - Electrically-driven housing switch device - Google Patents

Abstract

PURPOSE:To reduce a level of noise, and reduce an occupation space, and improve mechanical reliability by providing a lock mechanism which consists of a positive cam having a recessed part for stopper for locking a drawer part and a stopper pin to be guided by the positive cam. CONSTITUTION:A pinion 9 is connected directly to a rotating shaft 12a of a ultrasonic motor 12 as a power source of a drawer part 2, and a rack 10 integrally extended from a rear end of the drawer part 2 is engaged with the pinion 9. A lock mechanism 16 consists of a heart-shape positive cam 14 and a lock pin 15. The lock pin 15 can move in only the direction transverse to the drawing direction of the drawer part 2, and always can move freely along a guide channel 14a of the positive cam 14. Furthermore, a recessed part 14a1 for stopper is provided in the guide channel 14a of the positive guide 14 so that a movement of the lock pin 15 to the housing direction of the drawer part 2 is hindered when the drawer part 2 arrives an open position. Thus, a level of noise is reduced, and an occupation space is reduced, and mechanical reliability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric retractable switch device used in automobiles and the like.

[Prior art]

Examples of conventional electric storage switch devices include those shown in FIGS. 4 to 6.

That is, in these figures, 1 is a case, 2 is a drawer part whose front part can be pulled out (open state) and retracted (closed state B) through the front opening 1a of the case 1, and switches 13, 3, . . . . are arranged in rows, and switches 4, 4. ...... are installed in a row.

6 is a high-speed DC motor that is a power source, 7 is a worm directly connected to the rotating shaft 6a of this DC motor 6, 8 is a worm wheel meshed with this worm, 9 is a pinion coaxial with this worm wheel 8, and 10 is a This is a rack that meshes with the pinion 9 and extends from the rear end of the drawer section 2. These DC motor 6, worm 7, worm wheel 8, pinion 9, and rack 10 are built into the case 1.

Then, when the drawer section 2 is in the closed state shown in FIG.
When the DC motor 6 is rotated forward as shown by the arrow, the worm 7 rotates, the worm wheel 8 that meshes with it rotates, the pinion 9 that is coaxial with the worm wheel 8 rotates, and the rack 10 that meshes with it rotates. moves in the direction of the arrow,
The front part of the drawer part 2 integrated with this is the opening 1a of the case 1.
6, and finally reaches the open state shown in FIG.

Thus, in this state, switches li4, 4,...
... becomes operable.

If the DC motor 6 is rotated in the reverse direction as shown by the arrow in the state shown in FIG.
Finally, the closed state shown in FIG. 5 is reached.

[Problem to be solved by the invention]

However, such an electric storage switch device uses a high-speed DC motor 6 as a power source and a multi-stage gear group consisting of a worm 7, a worm wheel 8, a pinion 9, and a rack lO as a power transmission mechanism. As a result, the noise level is high, the device occupies a large space, and the number of parts is large, resulting in poor mechanical reliability.

The present invention has been made with attention to such conventional problems, and an object of the present invention is to provide an electric retractable switch that reduces noise level and occupies space, and improves mechanical rotation. With the goal.

Means for Solving Problem C] In order to achieve the above object, the present invention provides a drawer part whose front part can be pulled out and stored from a case and has switches provided on the front surface and the upper surface of the front part, and the drawer part. and a power transmission mechanism that transmits the power of the power source, an ultrasonic motor is used as the power source, and a pinion directly connected to the ultrasonic motor is used as the power transmission mechanism. and a positive cam that uses a rack that meshes with the pinion and is integral with the drawer part and has a stopper recess that locks the drawer part in the open position of the drawer part, and a stopper pin that is guided by the positive cam. It is equipped with a locking mechanism consisting of:

[For production]

When the ultrasonic motor is driven, a part of the drawer is pulled out from the case via the pinion and rack that are the power transmission mechanism, and in this open position, the lock pin of the lock mechanism engages with the stopper recess of the positive cam. This prevents the drawer from moving in the storage direction. Therefore, in this state, even if the switches on the front surface of the drawer are operated, the drawer will not be stored in the case.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings, in which parts that are the same as those of the prior art are denoted by the same reference numerals.

In FIGS. 1 and 2, 1 is a case, and 2 is a drawer part whose front part can be pulled out (in an open state) and stored (in a closed state) through the front opening 1a of the case 1. On the front side, there are switches etc. .3. . . . are arranged in a row, and switches 4, 4, .

As a power source for the drawer section 2, an ultrasonic motor 12 is used.

A pinion 9 is directly connected to the rotating shaft 12a of the ultrasonic motor 12, and meshes with the pinion 9 with a hook 10 that extends integrally from the rear end of the drawer portion 2.

The ultrasonic motor 12, pinion 9, and rack 10 are housed inside the case 1.

A heart-shaped positive cam 14 (for example, used in the locking mechanism of a bush lock switch) is fixed horizontally in the case 1 via a bracket shaft 13. A lock pin 15 guided by a lock pin 14 is provided vertically on a bracket 22 extending from the rear end of the drawer portion 2. A locking mechanism 16 is constituted by the heart-shaped positive cam 14 and the opening/lock pin 15.

The lock pin I5 is movable only in a direction perpendicular to the direction in which the drawer portion 2 is pulled out, and is always freely movable along the guide groove 14a of the positive cam 14.

A stopper recess 14a is provided in the guide groove 14a of the positive cam 14 so that the lock pin 15 is prevented from moving in the storage direction of the drawer 2 when the drawer 2 reaches the open position. ing.

When the drawer section 2 reaches the closed and open positions, the contacts 17a and 17b that protrude from the end of the rack 10 and the drawer section 2 come into contact with each other and operate to drive the ultrasonic motor 12. A detection switch 18 is provided on the front surface of the drawer section 2 to drive the ultrasonic motor 12 in the normal direction when the drawer section 2 is in the closed position, and a microswitch 19 is provided on the front surface of the drawer section 2 to drive the ultrasonic motor 12 in normal rotation when the drawer section 2 is in the open position. This is a microswitch that is activated by contacting the contactor 17C in a slightly pulled out position to drive the ultrasonic motor 12 in reverse.

In addition, at the position where the above-mentioned drawer part 2 is pulled out a little further than the open position, the lock pin 15 comes off from the stopper recess 14a1 of the positive cam 14 and becomes a free state.

20 is a stopper made of an elastic material that comes into contact with the end of the bracket 22 to stop the drawer portion 2 at a predetermined closed position; 21 is a printed circuit board for the driving circuit of the ultrasonic motor 12;

With this configuration, when the microsinch 18 is pushed in the closed state of the drawer section 2, the ultrasonic motor 12 is driven to rotate forward, and the drawer section 2 is pulled forward via the pinion 9 and the rack 10, and the drawer section 2 is pulled out to the open position. When the detection switch 17b is activated to stop the ultrasonic motor 12,
The forward movement of the drawer section 2 is stopped. In this case, the lock pin 1 of the lock mechanism 16 integrated with the drawer 2
As shown in FIG. 3, the positive cam 14 also moves forward from position A, passes through position B, and reaches position C, that is, the stopper recess 14a.

reaches the position where it engages.

Therefore, in this state, the switches 3 of the drawer 2,
3. Even if a pushing force is applied to the drawer part 2 by operating . , switch operations can be performed normally.

In this case, if there is no locking mechanism 16, the ultrasonic motor 12 itself has no holding force, and there is no worm 7 and worm wheel 8, which are deceleration means like in the past, so the drawer part 2 is closed to the case. It will be easily pushed into 1.

Next, when storing the drawer part 2 in this state, the drawer part 2 is pushed out a little further from the open position, and the lock pin 15 comes out of the stopper recess 14a1 of the positive cam 14 and becomes free. (position D), contact 1
7, the microswitch 19 is actuated and the ultrasonic motor 12 is driven in reverse. As a result, the drawer part 2 is stored in the case 1 via the pinion 9 and the rack 10,
When the closed position is reached, the end of the rack 10 comes into contact and the detection switch notch 17a is activated, the drive of the ultrasonic motor 12 is stopped, and the drawer section 2 is stopped. At the same time, bracket 22
The end portion of the drawer portion 2 comes into contact with the stopper 20, and the drawer portion 2 is accurately stopped at a predetermined closed position.

In this case, the lock pin 15 and the positive cam 14 also move back together with the drawer portion 2, returning to the original position A via position E.

As mentioned above, since the relatively low rotation and powerful ultrasonic motor 12 is used as the power source, the drawer part 2 can be pulled out without using reduction gears such as the worm 7 and the worm wheel 8 as in the conventional case. However, since the power transmission mechanism is made up of a small number of gears (pinion 9 and rack 10), it not only reduces the noise level, but also occupies less space and reduces the number of parts. As a result, mechanical restability also improves.

〔effect〕

As explained above, according to the present invention, there is provided a drawer part whose front part can be pulled out and stored from the case and which has switches on the front surface and the upper surface of the front part, and a power source for driving the drawer part. , a storage switch device equipped with a power transmission mechanism that transmits the power of this power source,
An ultrasonic motor is used as the power source, and a binion directly connected to the ultrasonic motor as a power transmission mechanism and a rack that meshes with the binion and is integrated with the drawer part are used, and when the drawer part is in the open position, the drawer The locking mechanism consists of a positive cam with a stopper recess for locking the part, and a stopper pin guided by the positive cam, which reduces the noise level and space occupied, as well as improves mechanical rollability. This also has the effect of improving performance.

[Brief explanation of drawings]

1 and 2 are an explanatory cross-sectional view of the drawer closed state and an explanatory cross-sectional view of the state between the drawers, respectively, showing one embodiment of the present invention. FIG. A bottom view of the cam, FIG. 4 is a partially cutaway perspective view showing a conventional example,
FIGS. 5 and 6 are cross-sectional views for explaining the drawn-out portion and the open state, respectively. 1... Case, 2... Drawer section, 3
...Switches, 4...Switches,
9... Binion, 10... Rack, 1
2... Ultrasonic motor (power source), 14...
... Positive cam, 14a ... Guide groove, 14a1
...Recess for stopper, 15 ... Lock pin, 16 ... Lock mechanism. Paper 1 Sonoki 3 Fallen paper 2 Sono no 5 Arithmetic 9n

Claims (1)

[Claims] A drawer part whose front part can be pulled out and stored from a case and which has switches on the front surface and the upper surface of the front part, a power source that drives the drawer part, and a power transmission mechanism that transmits the power of this power source. In the storage switch device, an ultrasonic motor is used as the power source, a pinion directly connected to the ultrasonic motor and a rack meshing with the pinion and integrated with the drawer are used as the power transmission mechanism, and the drawer is integrated with the drawer. 1. An electric retractable switch device comprising: a positive cam having a stopper recess for locking the drawer in an open position; and a locking mechanism comprising a stopper pin guided by the positive cam.