JP2882390B2 - Cleaning device for head carriage guide rail - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head carriage guide rail cleaning device suitable for use in, for example, a head carriage transport mechanism of an optical disk drive.

[0002]

2. Description of the Related Art Conventionally, an optical disk device such as a CD player is provided with a head carriage transport mechanism for guiding a head carriage in a tracking direction by a linear motor.

The head carriage transport mechanism will be described with reference to FIG. In FIG. 1, the head carriage transport mechanism denoted by reference numeral 1 includes guide rails 2 and 3, a carriage driving device 4, and an optical head carriage 5.

The guide rails 2 and 3 are formed of round bars extending in the tracking direction, and are disposed at positions (in the apparatus main body) that are arranged in parallel at a predetermined interval. The carriage driving device 4 includes, for example, a linear motor,
It is arranged between the two guide rails 2 and 3. The drive of the carriage driving device 4 is controlled by a controller (not shown).

The optical head carriage 5 includes an optical head 6
And are arranged on both guide rails 2 and 3 so as to be able to move forward and backward in the direction of arrow m. On one side of the optical head carriage 5, a 45 ° tilt bearing shaft (only one side is shown)
A pair of bearings 7 (only the upper one of the two upper and lower bearings is shown) that is rotatable about and can roll on the guide rail 2 is attached.

The other end of the optical head carriage 5 is arranged side by side at predetermined intervals in the tracking direction, and is rotatable around a 45 ° tilt bearing axis (not shown) and rolls on the guide rail 3. Two pairs of movable front and rear bearings 8, 9 (only the upper one of the two upper and lower bearings in each pair are shown) are attached.

Reference numerals 10 to 13 denote guide rails 2,
A holding block having a substantially L-shaped cross section for holding both end portions of 3;
14 to 17 are elastic pieces for pressing the guide rails 2 and 3 against the holding blocks 10 to 13 respectively.

In the head carriage transport mechanism of the optical disk device thus configured, the optical head carriage 5 advances and retreats on the guide rails 2 and 3 in the tracking direction by driving the carriage driving device 4.

[0009]

In this type of head carriage transport mechanism, when a large amount of dust adheres to the surfaces of the guide rails 2 and 3, the current load on the carriage drive unit 4 increases, and the optical head is driven. Since the tracking of the carriage 5 in the tracking direction becomes unstable, there has been a demand for a head carriage guide rail cleaning device that removes dust on the guide rail.

SUMMARY OF THE INVENTION The present invention has been made in order to meet such a demand, and a head carriage capable of obtaining a stable following operation of a head carriage in a tracking direction and thereby improving the reliability of head carriage conveyance. It is an object of the present invention to provide a guide rail cleaning device.

[0011]

According to a first aspect of the present invention, there is provided a head carriage guide rail cleaning device, comprising a guide rail for guiding a head carriage which is moved forward and backward by a carriage driving device. A rail cleaning member, which is rotatably held on the main body and can contact the guide rail, is provided, and a drive motor for applying a rotational force to the guide rail is provided. A controller having a sensor for detecting the control current is connected, and the controller is configured to include a controller that controls the rotation of the drive motor according to a change in the controlled current. Therefore, when the controlled current from the carriage driving device reaches the set value due to the adhesion of dust to the guide rail, the controller outputs a motor rotation signal to the driving motor.

According to a second aspect of the present invention, in the head carriage guide rail cleaning device of the first aspect, the driving motor is connected to the guide rail via a transmission mechanism including a belt and a pulley.

[0013] The invention according to claim 3 is the invention according to claim 1 or 2.
In the head carriage guiding rail cleaning device described above, the dimension of the rail cleaning member in the carriage retreating direction is set to a dimension corresponding to the moving range of the head carriage.

According to a fourth aspect of the present invention, in the head carriage guide rail cleaning device according to the first, second or third aspect, the head carriage comprises an optical head carriage.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings. 1 and 2 are a block diagram and a perspective view, respectively, showing a head carriage guide rail cleaning device according to an embodiment of the present invention. In FIG. 1 and FIG. Detailed description is omitted. In the figure, a head carriage guide rail cleaning device indicated by reference numeral 21 includes guide rails 2 and 3, a carriage driving device 4, an optical head carriage 5, rail cleaning members 22 and 23, a driving motor 24, and transmission mechanisms 25 and 26. And a controller 27.

The guide rails 2, 3 are rotatably held by holding blocks 10 to 13 via bearings 28 to 31, respectively. One of the guide rails 2 is a bearing 29
, And the other guide rail 3 passes through the bearings 30 and 31.

The rail cleaning members 22 and 23 are disposed in an apparatus main body (not shown) with the tip cleaning portions 22a and 23a in contact with the surfaces of the guide rails 2 and 3, and are entirely non-chargeable, for example. It is formed by a brush made of a member. The rail contact portions of the rail cleaning members 22 and 23 are
The dimension of the carriage in the reciprocating direction is set to a dimension corresponding to the moving range of the optical head carriage 5.

The drive motor 24 is disposed in the disk drive main body (not shown) and is connected to the controller 27. The drive motor 24 rotates on the guide rails 2 and 3 in the direction of arrow n via transmission mechanisms 25 and 26. Power is applied.

The transmission mechanism 25 comprises pulleys 32 and 33 and a transmission belt 34, and is disposed between the drive motor 24 and the guide rail 3. The pulley 32 is fixed to the motor shaft 24 a of the drive motor 24, and the pulley 33 is fixed to one end of the guide rail 3. The transmission belt 34 is stretched over both pulleys 32 and 33.

The transmission mechanism 26 includes pulleys 35 and 36 and a transmission belt 37, and is disposed between the guide rails 2 and 3. The pulley 35 is fixed to the other end of the guide rail 3, and the pulley 36 is fixed to the guide rail 2 in parallel with the pulley 35. The transmission belt 37 is stretched over both pulleys 35 and 36.

The controller 27 has a sensor (not shown) for detecting a controlled current a from the carriage driving device 4, and is connected to the driving motor 24. This allows
The rotation of the drive motor 24 is controlled by the change in the controlled current a. That is, when the controlled current a from the carriage driving device 4 is equal to or less than the set value (when the rolling friction force between the guide rails 2 and 3 and the bearings 7 to 9 is equal to or less than the set value), the drive motor 24 stops rotating, When it is equal to or greater than the set value, the drive motor 24 rotates. Controller 2
The drive of the carriage drive unit 4 is also controlled by the control unit 7.

In the head carriage guide rail cleaning apparatus thus constructed, the guide rails 2 and 3 are used.
The frictional resistance between the optical head carriage 5 and the guide rails 2 and 3 (the guide rails 2 and 3)
When the rolling friction between the motor and the bear rigs 7 to 9) increases, the current load on the carriage driving device 4 fluctuates rapidly.

At this time, the controlled current a as an output signal from the carriage driving device 4 reaches a set value, and the controller 27 outputs a motor rotation start signal to the driving motor 24 to control the rotation of the driving motor 24. Then, the torque of the drive motor 24 is transmitted to the guide rails 2 and 3 via the transmission mechanisms 25 and 26.

Therefore, in the present embodiment, the controlled current a from the carriage driving device 4 reaches the set value due to the adhesion of dust to the guide rails 2 and 3 (the controlled current a exceeds a predetermined current value). And a motor rotation start signal is output to the drive motor 24,
The dust 3 on the guide rails 2 and 3 is removed by rotating contact of the rail cleaning members 22 and 23 with each other.

In this embodiment, an example is shown in which the present invention is applied to a transport mechanism of an optical head carriage. However, the present invention is not limited to this, and can be applied to a transport mechanism of a magnetic head carriage in the same manner as the embodiment. It is.

[0026]

As described above, according to the present invention, the controller controls the rotation of the drive motor that applies the rotational force to the guide rail by detecting the change in the controlled current from the carriage driving device. When the controlled current from the carriage driving device reaches a set value due to the adhesion of dust to the rail, the controller outputs a motor rotation signal to the driving motor.

Accordingly, the rotation of the drive motor causes the guide rail to come into rotational contact with the rail cleaning member to remove dust on the guide rail, so that a stable operation of following the head carriage in the tracking direction can be obtained.
The reliability in transporting the head carriage can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a head carriage guide rail cleaning device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a head carriage guide rail cleaning device according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a head carriage transport mechanism of the optical disk device.

[Explanation of symbols]

 2, 3 guide rail 4 carriage driving device 5 optical head carriage 21 cleaning device for head carriage guide rail 22, 23 rail cleaning member 24 drive motor 27 controller a controlled current

Claims (4)

(57) [Claims] An apparatus main body rotatably holds a guide rail that guides a head carriage that advances and retreats by a carriage driving device, a rail cleaning member that can contact the guide rail, and a rotation of the guide rail. A drive motor for applying a force, a controller having a sensor for detecting a controlled current from the carriage driving device is connected to the drive motor, and the controller controls the drive motor by a change in the controlled current. A head carriage guide rail cleaning device comprising a controller for controlling rotation. 2. The head carriage guide rail cleaning device according to claim 1, wherein the drive motor is connected to the guide rail via a transmission mechanism including a belt and a pulley. 3. The rail cleaning member according to claim 1, wherein a dimension of the rail cleaning member in the carriage retreating direction is set to a dimension corresponding to a moving range of the head carriage.
A cleaning device for a head carriage guide rail according to any one of the preceding claims. 4. The head carriage according to claim 1, wherein said head carriage comprises an optical head carriage.
A cleaning device for a head carriage guide rail according to any one of the preceding claims.