JP2591077B2 - Cleaning cartridge for optical head objective lens - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to an optical disc device, and more particularly to a cleaning cartridge for cleaning an objective lens built in an optical head, which can be cleaned while the objective lens is mounted on the device. A main gear mounted in place of the disk in a container of a disk cartridge excluding a disk for the purpose of providing a cartridge for cleaning an optical head objective lens, and an optical pickup window of the cartridge container engaged with the main gear. An auxiliary gear that is pivotally supported at a substantially intermediate position of the auxiliary gear; a vibration transmission mechanism that transmits reverse rotation to the auxiliary gear by rotation of the main gear and vibration of a predetermined amplitude in the direction of the axis of the auxiliary gear; A cleaning rod that can be mounted on a shaft of the disk cartridge and that can protrude and retract from the surface of the container of the disk cartridge. A projection provided in a narrow band shape with a semicircular cross section in one radial direction on one surface of a disk-shaped disk accommodated in the container of the disk cartridge, and a pivotal support at a substantially intermediate position of the optical pickup window of the container of the disk cartridge. And
A windmill rotatably provided in a cavity opposed to the surface of the disk having the protrusions, wherein the protrusion at one end of the shaft of the windmill vibrates at a predetermined amplitude due to rotation in the direction of the shaft of the windmill; Vibration transmission mechanism to be transmitted to the windmill shaft
And a cleaning rod provided to be able to protrude and retract from the surface of the container of the disk cartridge.

[Industrial applications]

The present invention relates to an optical disc device, and more particularly to a cleaning cartridge for cleaning an objective lens built in an optical head.

[Conventional technology]

5 (a) is a top view, FIG. 5 (b) is a side view, and FIG.
Figure (c) shows a front view. In the figure, reference numeral 1 denotes a disk cartridge, in which a magneto-optical disk 2 is provided.
Are rotatably accommodated. (C) shows an intermediate position where the disk cartridge 1 is inserted into the apparatus from the disk cartridge insertion opening 8 in the front view, and (b) moves from a position shown by a broken line to a position shown by a solid line as shown in a side view and is completely mounted. At this point, the spindle shaft 7 is automatically fitted. When the disc cartridge 1 is taken out, the disc cartridge can be automatically collected outside the apparatus by pressing the disc cartridge eject switch 9.

Reference numeral 3 denotes an optical head, which includes an objective lens 4 and a magnetic field generating coil 5, and is driven by tracking along a dashed line at the center of (a) a top view. Reference numeral 6 contains a power supply, a head control unit, and the like.

As can be seen from the figure, when the disc cartridge 1 is inserted into the apparatus through the insertion opening 8, the gap between the disc cartridge 1 and the optical head 3 or the objective lens 4 becomes extremely small, about several mm. Further, the apparatus itself has a complicated structure, and the removal of the optical head 3 and the removal of the objective lens 4 may involve a mounting error due to a deviation of the optical axis of the laser beam or a mounting deviation, and cannot be easily replaced. Furthermore, when the exterior (not shown) of the drive is removed, there are printed wiring on the upper and lower surfaces, and there is also a connection between the upper and lower surfaces by a high-density flexible wiring board.

FIG. 6 is a side view showing a related position between a conventional magneto-optical disk and an optical head. In the figure, a magneto-optical disk 2 accommodated in a disk cartridge 1 is fitted on a spindle shaft 7, and an objective lens 4 of an optical head 3 maintains a necessary focal length with respect to a recording surface of the magneto-optical disk 2. Rotate. The access of the optical head 3 is performed in the direction of arrow P.

[Problems to be solved by the invention]

In an optical disk device or a magneto-optical disk device, there is a problem that dust such as cigarette smoke enters the device and adheres to the objective lens or the disk itself, thereby deteriorating the signal quality detected.

If the structure of the device itself is simple, the attached dirt may be wiped off with a cleaning stick (for example, a cotton swab in which cotton or the like is wrapped around the tip of a thin stick in a spherical shape). Therefore, wiping is extremely difficult, and in particular, it is almost impossible to remove the objective lens.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional drawbacks, and has as its object to provide a cartridge for cleaning an objective lens of an optical head which can be cleaned while the objective lens is mounted on the apparatus.

[Means for solving the problem]

FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 3 is a block diagram of a second embodiment of the present invention. A first embodiment is:
A main gear 10 mounted in place of the disk in the container of the disk cartridge 1 excluding the disk, and meshed with the main gear 10 to be pivotally supported at a substantially intermediate position of an optical pickup window of the container of the disk cartridge 1. Secondary gear 11
A vibration transmission mechanism 12 that transmits reverse rotation to the auxiliary gear 11 by rotation of the main gear 10 and vibration of a predetermined amplitude in the direction of the axis 14 of the auxiliary gear, and can be mounted on the axis 14 of the auxiliary gear. ,
And a cleaning rod 13 provided to be able to protrude and retract from the surface of the container of the disk cartridge 1.

The second embodiment is different from the first embodiment in that a projection 16 provided in a narrow band shape with a semicircular cross section in one radial direction on one surface of a disk-shaped disk 15 housed in the container of the disk cartridge 1 is provided. A windmill 18 rotatably provided in a cavity 17 which is pivotally supported at a substantially intermediate position of the pickup window and faces a surface of the disc 15 on the side having the projection 16;
A vibration transmitting mechanism 20 for transmitting the vibration of a predetermined amplitude with the rotation of the projection 16 to one end of a shaft 19 of the shaft 18 in the direction of the shaft 19; and a container mountable on the shaft 19 of the wind turbine and for the disk cartridge 1. And a cleaning rod 13 provided so as to be able to protrude and retract from the surface.

[Operation] In the first embodiment, as a method of cleaning the objective lens, vibration is applied to the cleaning rod 13 in the axial direction while rotating the cleaning rod 13, and the tip of the cleaning rod 13 is attached to a concave objective lens (not shown). The cleaning rod 13 is rotated by two gears 10 and 11 provided in the container of the cartridge 1, and the vibration is transmitted by a vibration transmission mechanism 12 provided between the two gears. Positioning is possible by a mechanical lock or an electrical lock of an optical head (not shown).

In the second embodiment, the cleaning rod 13 is rotated by generating a wind by a narrow strip-shaped projection 16 provided on one surface of a disk-shaped disc 15 rotating in the container of the cartridge 1 and receiving the wind. A rotating windmill 18 is used. For transmitting the vibration, a vibration transmission mechanism 20 provided so that the projection 16 repeatedly contacts the one end of the shaft 19 of the wind turbine is used.

In either embodiment, the adhering matter can be effectively cleaned by impregnating the cleaning rod 13 with highly volatile alcohol or the like.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition,
To facilitate understanding of the description of the configuration and operation, the same portions are denoted by the same reference numerals throughout the drawings, and redundant description will be omitted.

FIG. 1 is a block diagram of a first embodiment of the present invention. FIG. 1 (a) is a layout view of gears in a disk cartridge container, and FIG. 1 (b) is a view in FIG. 1 (a). FIG. In both figures, reference numeral 10 denotes a main gear mounted in place of the disk in the container of the disk cartridge 1 excluding the disk, and is driven to rotate by a spindle shaft (not shown). Reference numeral 11 denotes a sub gear which meshes with the main gear 10 and is supported at a substantially intermediate position of an optical pickup window (not shown) of the container of the disc cartridge 1.
A vibration transmitting mechanism (second vibration) that transmits reverse rotation to the auxiliary gear 11 by rotation of the auxiliary gear 11 and vibration having a predetermined amplitude of several mm in the direction of the shaft 14 of the auxiliary gear.
Reference numeral 13 denotes a cleaning rod which can be mounted on the shaft 14 of the auxiliary gear and is provided so as to be able to protrude and retract from the surface of the container of the disk cartridge 1.

FIG. 2 is an exploded view of both gears in FIG. 1 (vibration transmission mechanism diagram).
Is shown. In the figure, reference numeral 12a denotes a ring-shaped flange (formed to be thinner than the thickness of the gear) projecting over the gear of the main gear 10, and 12b denotes a guide groove formed by cutting the tooth surface of the auxiliary gear 10. As shown in the figure, an angle is set so as to reciprocate substantially the thickness of the gear during one round of the tooth surface, and the flange 12a and the guide groove 12b are smoothly fitted and rotated with each other. As shown in FIG. 1 (b), the shaft 14 of the auxiliary gear is rotatably supported in the axial direction by the ceiling plate 22 of the disk cartridge and the low plate 23 of the disk cartridge. Tsuba 12a shown in FIG.
Moves the tooth surface of the auxiliary gear 11 up and down.
14 is a vibration having a predetermined amplitude of several mm in the axial direction (the dimension L
Is transmitted. Therefore, the cleaning rod 13 mounted on the shaft 14 of the auxiliary gear operates so as to protrude and retract from the surface of the ceiling plate 22 of the disk cartridge.

The objective lens of the optical head (not shown) is mechanically or electrically positioned in advance corresponding to the position of the cleaning rod 13 so that the objective lens is cleaned by the cleaning rod 13 that vibrates with rotation. At this time, effective cleaning can be performed by impregnating the cleaning rod 13 with highly volatile isopropyl alcohol or the like.

FIG. 3 is a block diagram showing a second embodiment of the present invention, and FIG.
The figure shows the BB 'enlarged sectional view of FIG. In both figures, reference numeral 15 denotes a disk-shaped disk (formed of, for example, an aluminum plate) accommodated in the container of the disk cartridge 1 and is rotated by a spindle shaft (not shown). 16
Is a semicircular cross section in the radial direction of one side of the disk 15 (C-C ').
(Refer to the cross-sectional view).
Wind is generated with the rotation of.

Reference numeral 17 denotes a cavity provided in the thickness of the ceiling plate 22 of the disk cartridge, and rotatably supports and accommodates the windmill 18.
The cavity 17 is provided so that the disk 15 faces the surface on which the protrusion 16 is provided. A shaft 19 of the windmill that rotates integrally with the windmill 18 is supported in the cavity 17 so as to be movable in the axial direction.

Reference numeral 20 denotes a vibration transmission mechanism, which includes a leaf spring 20a and a shaft 1 of a windmill.
When the projection 16 abuts on the lower end of the shaft 19 of the windmill as the disk 15 rotates, the lower end is pushed up in the axial direction. 20a
Is pushed up to the position shown by the broken line. When the protrusion 16 has passed the lower end of the shaft 19, it lowers to the original position by the action of the leaf spring 20a. As a result, the axis 19 of the wind turbine is
Is transmitted. The cleaning rod 13 can be attached to the upper end of the shaft 19 of the windmill, and is provided so as to be able to protrude and retract from the surface of the ceiling plate 22 of the disk cartridge.

Reference numeral 21 denotes a ventilation hole, which is a plurality of holes provided inside and outside the cavity 17 so as to allow ventilation. The windmill rotates by the action of the wind generated by the projections 16 as the disk 15 rotates. Therefore, the cleaning rod 13 mounted on the shaft 14 operates so as to protrude and retract from the surface of the ceiling plate 22 of the disk cartridge while rotating. This makes it possible to clean the objective lens (not shown) as in the first embodiment.

〔The invention's effect〕

As is apparent from the above description, according to the present invention, it is possible to clean the objective lens of the optical head without turning off the power of the apparatus and without disassembling the apparatus, thereby improving the long-term reliability of the apparatus. There is an effect that can be achieved.

[Brief description of the drawings]

FIG. 1 is a structural view of a first embodiment of the present invention, FIG. 2 is an exploded view of a gear of FIG. 1 (vibration transmission mechanism diagram), and FIG. 3 is a structural view of a second embodiment of the present invention. 4 is an enlarged sectional view taken along the line BB 'of FIG. 3, FIG. 5 is a configuration diagram of a conventional magneto-optical disk drive, and FIG. 6 is a side view showing a relative position of a conventional magneto-optical disk and an optical head. is there. 1 and 4, 1 is a disk cartridge,
10 is a main gear, 11 is a sub gear, 12 and 20 are vibration transmission mechanisms, 13 is a cleaning rod, 14 is a shaft of a sub gear, 15 is a disk, 16 protrusions, 17 is a hollow, 18 is a gear, and 19 is a gear. Each axis is shown.

Claims (2)

(57) [Claims] 1. A main gear (10) mounted in place of the disk in a container of a disk cartridge (1) excluding a disk, and a main gear (10) meshing with the main gear (10) and a container of the disk cartridge (1). An auxiliary gear (11) pivotally supported at a substantially intermediate position of the optical pickup window; a reverse rotation of the auxiliary gear (11) by rotation of the main gear (10); and a direction of an axis (14) of the auxiliary gear. A vibration transmitting mechanism (12) for transmitting vibration of a predetermined amplitude to a shaft (14) of the auxiliary gear, and a cleaning rod ( 13) A cartridge for cleaning an objective lens of an optical head, characterized by comprising: 2. A disk-shaped disk (15) housed in a container of a disk cartridge (1), a projection (16) provided in a radial direction on one surface and having a semicircular cross-section in a semicircular cross section, and A windmill rotatably provided in a hollow (17) which is supported at a position substantially in the middle of the optical pickup window of the container (1) and faces the surface of the disk (15) having the projection (16). (18) a vibration transmission mechanism (20) for transmitting vibration of a predetermined amplitude along the rotation of the projection (16) to one end of the windmill shaft (19) in the direction of the windmill shaft (19); A cleaning rod (13) mounted on a shaft (19) of a gear and protruding and retractable from the surface of the container of the disk cartridge (1). Cleaning cartridge.