JP2728014B2 - Optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device,
In particular, it relates to the structure of a guide shaft for guiding a carriage.

[0002]

2. Description of the Related Art A conventional carriage transport structure is disclosed in, for example, Japanese Patent Application Laid-Open Nos. Hei 5-314498 and Hei 5-074068.
As disclosed in Japanese Patent Application Laid-Open No. Hei. 3-320683 and Japanese Patent Application Laid-Open No. Hei 1-320683, a porous member impregnated with a carbon-containing synthetic resin, an oil-containing resin and a viscous material (silicone grease, fluorine-based lubricant, magnetic fluid) is used as a bearing for a carriage. And a guide shaft that has been impregnated and baked with a lubricant, and a guide shaft that rotates the guide shaft as disclosed in Japanese Patent Application Laid-Open No. 5-274821.

[0003] All of these are intended to reduce sliding friction when the carriage slides while being guided by the guide shaft.

[0004]

In these conventional carriage transport structures, for example, when a carbon-containing synthetic resin is used as a bearing of the carriage, abrasion powder of the resin acts as an adhesive action to cause secondary obstacles. If the dispersion of carbon in the resin is poor, the lubricating effect may be significantly impaired.

Further, when a porous member impregnated with a viscous substance such as oil is used, the action of adhering abrasion powder and the instability of the amount of viscous substance oozing out of the porous member, and even when the apparatus is not used, There has been a problem such as an adhesive action due to the possibility that the viscous material may ooze from the porous member.

In the method of rotating the guide shaft to reduce the frictional force by changing the sliding friction between the carriage and the guide shaft into a dynamic friction state, the structure is complicated and expensive, and the apparatus is large and heavy, and the power consumption is large. There were many problems.

[0007]

The carriage transport structure of the optical disk apparatus according to the present invention has a hollow shape, in which volatile oil having a low viscosity is sealed inside the hollow shape, and comes into contact with a bearing of the carriage. A guide shaft in which a plurality of grooves are provided on the outer diameter surface in the moving direction of the carriage, and a plurality of capillary holes connected to the inside of the hollow shape are formed on the surface of the outer diameter surface sandwiched between the grooves. It has.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a carriage conveying structure according to one embodiment of the present invention, FIG. 2 is a cross-sectional perspective view of a guide shaft according to one embodiment of the present invention, and FIG. 3 is an enlarged cross-sectional view of the guide shaft. .

The guide shaft 2 forming the carriage transport structure 1 has a hollow shape 3, and a volatile oil 4 having a low viscosity is sealed in the hollow shape 3. A plurality of grooves 11 are provided on the outer diameter surface 9 of the carriage 6 on which the optical head 5 is mounted and in contact with the bearings 7 and 8 in the moving direction 10 of the carriage 6. A plurality of capillary holes 13 communicating with the inside of the hollow shape 3 are formed in the surface 12 of the radial surface 9.

FIG. 4 is a sectional view taken along the line AA in FIG.

When the carriage 6 moves while being guided by the guide shaft 2, the volatile oil 4 filling the capillary holes 8 in contact with the bearings 7, 8 of the carriage 6 is filled with the volatile oil 4. Negative pressure near the surface 12 of the capillary bore 13 generated by the relative speed between the guide shaft 8 and the guide shaft 2 oozes into the gap 14 between the bearings 7 and 8 of the carriage 6 and the surface 12 of the guide shaft 2. The oozed volatile oil lubricates between the bearings 7 and 8 and the guide shaft 2.

Therefore, the carriage 6 is connected to the guide shaft 2
And the bearing 7 and 8 do not contact the portion of the guide shaft 2 where the bearings 7 and 8 are not in contact with each other. Bleeding will be minimal.

[0013]

As described above, the carriage transport structure of the optical disk device according to the present invention allows volatile oil to ooze out of the capillary hole of the guide shaft when a relative speed is generated between the carriage and the guide shaft. As a result, the oozing of the lubricating oil when the device is not in use is eliminated. In addition, even during use of the device, the diameter of the capillary hole and the viscosity of the volatile oil can be controlled so that the volatile oil does not excessively ooze out, so that an increase in running resistance and adhesion due to the viscosity of the lubricant can be prevented, The carriage can be moved stably.

[Brief description of the drawings]

FIG. 1 is a perspective view of a carriage conveyance structure according to an embodiment of the present invention.

FIG. 2 is a sectional perspective view of a guide shaft according to one embodiment of the present invention.

FIG. 3 is an enlarged sectional view of a guide shaft according to one embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carriage conveyance structure 2 Guide shaft 3 Hollow shape 4 Volatile oil 6 Carriage 7, 8 Bearing 9 Outer diameter surface 11 Groove 13 Capillary tubular hole

Claims (2)

(57) [Claims] And 1. A information is written optical disk, an optical head for writing information on an optical disk to read the information written on the optical disc, a carriage mounting the optical head moves in the radial direction of the optical disc, the calibration
A guide shaft that guides the carriage in the radial direction of the optical disk while contacting the bearing of the ridge , wherein the guide shaft has a hollow shape, and a low-viscosity volatile material is formed inside the hollow shape.
Oil is sealed and comes into contact with the bearing on the outer diameter surface
On the surface, the optical disc apparatus is a guide shaft in which a plurality of capillary holes are formed that conduction with the internal medium air shape. 2. The carriage according to claim 1, wherein said guide shaft is a bearing for a carriage.
Multiple grooves in the direction of carriage movement
Is provided on the surface of the outer diameter surface sandwiched between these grooves.
The plurality of capillary holes are formed.
The optical disk device according to claim 1.