JPH08277902A - Driving device and loading device - Google Patents

Abstract

PURPOSE: To provide a driving device with simple constitution equipped with a lock state releasing device. CONSTITUTION: This device is constituted of a motor 11 having a worm 12 on its shaft, a motor pedestal 16 on which the motor 11 is placed and a worm wheel 13 engaged with the worm 12 is rotatably supported by a shaft arranged, a bottom plate 17 on which the motor pedestal 16 is rotatably mounted around the rotating axis 18, and a spring 19 which energizes the motor pedestal 16 so as to engage the worm wheel 13 with a spur gear 15 positioned outside of the pedestal 16. According to this constitution, when the pedestal spur gear 15 is rotated, the motor pedestal 16 rotates and locking condition between the worm wheel 13 and the pedestal spur gear 15 is released, and the pedestal spur gear 15 can be freely rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device and a loading device which utilize a worm gear and can release a locked state with a simple structure.

[0002]

2. Description of the Related Art In recent years, with the progress of information technology, CD players have been in the limelight because of their large storage capacity and the ability to reproduce in large numbers.
There is a need for an inexpensive CD player drive. C
A driving device using a worm is often used for feeding and inserting the slide table of the D player.

Conventionally, many motors and spur gears have been used in drive devices, but racks, bevel gears, etc. have been used according to the demands at that time. One of them is the worm gear. Although the worm gear can greatly reduce the rotation speed in one stage, the assembly conditions are severe, such as severe wear due to the positional relationship between the worm and the worm wheel.

Further, the worm gear can rotate the worm by rotating its structure, but cannot rotate the worm by rotating the worm wheel. Therefore, when it is necessary to directly rotate the worm wheel, a mechanism for directly controlling the rotation of the motor or releasing the locked state of the worm gear is needed.

A conventional drive device provided with a lock release mechanism will be described with reference to FIG. Reference numeral 1 is a motor having a worm 2 mounted on a shaft, 3 is a worm wheel that meshes with the worm 2, and a spur gear 4 is integrally mounted, 5 is a pedestal external spur gear that meshes with the spur gear 4, and 6 is a lock release member. By rotating the worm wheel 3 against the repulsive force of the spring 7 by rotating it in the direction of the arrow 4
The meshed worm 2 and worm wheel 3 are separated from each other.

In the above structure, the rotation of the motor 1 causes the worm 2 to rotate the worm wheel 3, and the spur gear 4 integrated with the worm wheel 3 causes the pedestal outer spur gear 5 to rotate. However, if the pedestal outer spur gear 5 is to be directly rotated without being dependent on the motor 1, the worm 2 cannot be rotated by the worm wheel 3 and the worm 2 is locked. When the locked state is reached, the locked state releasing member 6 pushes down the worm wheel 3 to separate the worm wheel 3 from the worm wheel 3. As a result, the pedestal outer spur gear 5 is not dependent on the worm 2 and can rotate freely.

[0007]

Due to the structure of the worm gear, it is not possible to rotate the worm to rotate the worm wheel. That is, the drive device using the worm gear is in the locked state because the worm wheel does not move unless the motor is rotated. for that reason,
When trying to directly rotate the spur gear that meshes with the worm gear, either control the rotation of the motor or separate the worm wheel and spur gear by the lock release mechanism as described above, and do not mesh the worm wheel and spur gear. Had to do so.

However, the conventional mechanism for releasing the lock by pushing down the worm wheel requires a space for rotating the lock state releasing member, which has been a problem in downsizing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a drive device that can release the locked state as needed with a small space and a simple structure.

[0010]

In order to achieve the above object, the present invention rotatably supports a motor having a worm on a shaft and a worm wheel on which the motor is placed and meshes with the worm. A motor pedestal disposed in a fixed manner, a fixed base rotatably attached to the motor pedestal about an axis, and a spring urging the motor pedestal so that the worm wheel meshes with the driven body. By rotating the motor pedestal, the engagement between the worm wheel and the driven body is released.

[0011]

According to the present invention having the above-mentioned structure, the driven body is driven through the worm gear by rotating the motor.

On the other hand, if the driven body is moved directly without being dependent on the motor, the worm wheel will be locked. However, due to the force that drives the driven body, the motor base in the locked state rotates around the shaft due to the force, and the locked state of the worm and worm wheel is released, allowing the driven body to move freely. Is possible.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 11 is a motor in which a worm 12 is attached to a shaft, 13 is a worm wheel in which the worm 12 is meshed, and a spur gear 14 is integrally mounted, and 15 is a pedestal external spur gear that meshes with the spur gear 14 as a driven body. , 16 are rotary shafts 18 on a bottom plate 17 as a fixed base.
A motor pedestal mounted rotatably around the motor. A motor 11 is mounted on the motor pedestal 16, and a worm wheel 13 is rotatably supported by a shaft.

Reference numeral 19 denotes a spring that holds the motor pedestal 16 at a predetermined position and biases the motor pedestal 16 in a direction in which the spur gear 14 of the worm wheel 13 meshes with the pedestal outer spur gear 15. The spring 19 is mounted on the motor pedestal 16. Shaft 20 and bottom plate 1
It is connected between the mounting shaft 21 on the 7 and.

Further, the rotary shaft 1 supporting the motor pedestal 16
8 is provided at a position perpendicular to a tangent line of a position where the spur gear 14 meshes with a position where the spur gear 14 and the pedestal outer spur gear 15 mesh with each other.

The operation of the motor 1 will be described with the above configuration.
When 1 rotates, worm 12, worm wheel 1
3. The spur gear 14 causes the pedestal spur gear 15 to rotate.
On the other hand, when a force not dependent on the motor 11 is applied to the pedestal external spur gear 15, the worm wheel 13 cannot be rotated to rotate the worm wheel 12, and the worm wheel 13 is locked. However, the base spur gear 1
The motor pedestal 16 moves around the rotary shaft 18 by the force of the rotation of the spur gear 5 and the spur gear 14
The unlocked state of the pedestal external spur gear 15 is released, and the pedestal external spur gear 15 can independently rotate freely. When the force is no longer applied, the moved motor pedestal 16 is pulled back by the spring 19, and the spur gear 14 and the pedestal outer spur gear 15 come into mesh with each other.

In the above embodiment, the tangent line of the spur gear 14 and the pedestal outer spur gear 15 are arranged to be vertical at the position where the rotary shaft 18 meshes with each other. However, this angle is an acute angle or an obtuse angle. It may be configured to be. However, in this case, the lock release mechanism works for rotation in a certain direction, but the lock release mechanism may not work for rotation in a certain direction.

Although the spur gear 14 is integrally attached to the worm wheel 13 in the above embodiment, the worm wheel 13 can be directly meshed with the pedestal outer spur gear 15.

Next, an example in which the above driving device is used as a loading device will be described with reference to FIGS.

In the figure, 22 is a slide table on which a driving device is arranged, 23 is a rack provided on the inner side wall of a loading case 24 shown by a two-dot broken line.
3 is engaged with the spur gear 14 of the worm wheel 13 of the drive unit, and the slide table 22 housed in the loading case 24 so as to be able to be taken in and out is the worm wheel 1
The rotation of 3 causes the loading case 24 to be taken in and out.

The operation of the above-described structure will be described. The motor 11
The spur gear 14 that transmits the rotation of the gear meshes with the rack 23 and controls the motor 11 to feed and insert the slide table 22. If the user forcibly pulls out or pushes in the slide table 22, the spur gear 14
A force that does not depend on the motor 11 acts on the spur gear 14, and the spur gear 14 is locked. However, the motor pedestal 16 is rotated about the rotary shaft 18 by the force to move the slide table 22, the locked state of the rack 23 and the spur gear 14 is released, and the user can freely move the slide table 22 in and out. You can When the force is removed, the motor pedestal 16 returns to its home position by the spring 19.

In the above embodiment, the spur gear 14 integrated with the worm wheel 13 is moved by engaging with the rack 23, but a large worm wheel is required to reduce the rotation speed. Therefore, when a large space is required or a larger torque is required, a spur gear may be further meshed with the above-mentioned loading device to move it on the rack. A bevel gear may be used instead of the spur gear depending on the moving direction of loading.

[0023]

As is apparent from the above description, according to the present invention, the motor and the worm gear are mounted on the motor pedestal,
The motor pedestal is attached to a fixed base so as to be rotatable about an axis, and is urged by a spring in the direction of the driven body so that the motor pedestal is provided with a lock state releasing mechanism with a small space and a simple structure. And loading device can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a driving device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a loading device according to an embodiment of the present invention.

FIG. 3 is a plan view of the loading device.

FIG. 4 is a perspective view of a conventional drive device.

[Explanation of symbols]

 11 motor 12 worm 13 worm wheel 14 spur gear 15 pedestal outer spur gear 16 motor pedestal 17 bottom plate 19 spring 22 slide table 23 rack 24 loading case

Claims (3)

[Claims] 1. A motor having a shaft provided with a worm,
A motor pedestal on which the motor is placed and a worm wheel that meshes with the worm is rotatably supported by an axis, a fixed base on which the motor pedestal is rotatably mounted about the axis, and the motor pedestal A spring for urging the worm wheel to mesh with the driven body,
A drive device configured to release the mesh between the worm wheel and the driven body by rotating the motor pedestal. 2. The drive device according to claim 1, wherein a shaft for supporting the motor pedestal is provided at a position perpendicular to a tangent of a point where the worm wheel meshes with the driven body. 3. A loading case having a rack,
A loading device having a slide table that is removably housed in the loading case, wherein the drive device according to claim 1 is disposed on the slide table, and the rack and a worm wheel of the drive device are meshed with each other.