JP3096196B2 - 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 drive, and more particularly, to the arrangement of an optical pickup unit of an optical disk drive.

[0002]

2. Description of the Related Art FIG. 4 is a diagram for explaining an example of the prior art of a drive device for a single-sided optical disk.
Reference numeral 11 denotes an apparatus main body, 12 denotes an opening / closing door, 13 denotes a single-sided optical disk, and 14 denotes an objective lens. In this example, an optical disk drive for a single-sided optical disk having no case such as a CD can be opened and closed with respect to the apparatus main body 11. The connected door 12 is opened, and the optical disk 13 is attached to and detached from the apparatus main body 11. In this case, the optical disk 13
An optical pickup unit for recording and / or reproducing information with respect to is provided in the apparatus main body 11,
The objective lens 14 of the optical pickup unit includes:
It is arranged below the optical disk 13 so that the light is focused on the optical disk 13 located above the optical pickup unit (with the objective lens 14 facing upward).

FIG. 5 is a diagram for explaining an example of the prior art of a drive device for a double-sided optical disk.
1 is a chassis, 22 is a double-sided optical disk, 23 is a spindle motor, 24 is a drive shaft, 25 is a disk table, 2
6 is a chucking member, 27 is an optical system block, 28
Is a first optical path bending mirror, 29 is a first objective lens, 30 is a second optical path bending mirror, 31 is a second objective lens, 41 is a first reflecting mirror, 42 is a second reflecting mirror, 43 Is a plunger, and 44 is a rotating shaft.

In the drive device shown in FIG. 5, when irradiating the light beam onto the upper surface 22a of the double-sided optical disk, the light path of the light beam emitted from the optical system block 27 is passed through the first reflection mirror 41 and the second reflection mirror. The light is irradiated onto the upper surface 22a of the double-sided optical disk by being changed by 42 and the first optical path bending mirror 28. On the other hand, when irradiating the lower surface 22b of the double-sided optical disk with the light beam, the plunger 43 is operated to retract the first reflection mirror 41 from the optical path of the light beam (rotate in the direction indicated by A in the figure). Then, the light beam is reflected by the second optical path bending mirror 30, and is irradiated on the lower surface 22b of the double-sided optical disk. Therefore, the objective lenses 29 and 31 (optical pickup unit)
Are disposed above and below the double-sided optical disk 22.

[0005]

As described above, in the optical disk drive device, since the optical disk is attached and detached, the optical disk drive device cannot be hermetically sealed, so that dust in the surrounding environment is brought into the drive device. Is inevitable. A major factor that dust in the surrounding environment is brought into the drive device is intrusion of dust when the drive device is opened when the optical disc is attached or detached, or dust attached to the optical disc itself when the optical disc is mounted. However, in particular, dust adhering to the optical disc
It tends to accumulate near the objective lens in contact with the optical disc.

Also, from the structural point of view, for example, in the optical disk drive shown in FIG. 4, the door of the drive is opened when loading or unloading the optical disk. At this time, an optical pickup is arranged below the optical disk. Therefore, dust easily accumulates near the objective lens of the optical pickup. Further, the drive device shown in FIG. 5 inserts and removes the optical disk from the optical disk insertion port provided in the main body, so that invasion of dust from the optical disk insertion port is unavoidable, and is disposed below the optical disk. Dust easily accumulates near the objective lens.

[0007] In an optical disk drive, the accumulation of dust near the objective lens causes a malfunction. As a countermeasure, periodic lens cleaning and automatic cleaning with a lens cleaner disk are performed, but in any case, it takes time and effort to clean the lens, and optical deterioration of the lens is inevitable. There has been a problem in dealing with dust accumulated near the objective lens.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides an optical pickup unit, particularly an optical disk drive apparatus having a structure in which dust does not accumulate near an objective lens of the optical pickup unit. It was done for the purpose.

[0009]

In order to solve the above-mentioned problems, the present invention provides (1) a main body for accommodating an optical disk, and a door located above the main body and connected to the main body so as to be openable and closable. And an optical pickup unit for recording and / or reproducing information on / from the optical disk in the optical disk drive device having the door opened and the optical disk mounted / removed in / from the main body. ,
Or (2) recording information on the optical disc and / or
Alternatively, in an optical disk drive device in which an optical pickup unit for reproducing and a spindle motor are built in the device main body, and the optical disk is inserted into and removed from the device main body through an optical disk insertion port of the device main body, the optical pickup unit is located above the optical disk. And a drive shaft of the spindle motor for driving the optical disk is provided above the optical disk.

[0010]

By arranging the optical pickup unit above the optical disk, dust brought in when the optical disk is inserted is prevented from accumulating near the optical pickup unit, particularly, near the objective lens of the optical pickup unit. Implement a drive device.

[0011]

FIG. 1 is a block diagram for explaining an embodiment of an optical disk drive according to the present invention. FIG. 1 (a) is a schematic sectional view of the apparatus. 2 is a door with a built-in optical pickup unit,
Reference numeral 3 denotes an optical disk, 4 denotes an optical pickup unit, 5 denotes an objective lens, 6 denotes a seek coil, 7 denotes a seek shaft, and 8 denotes a spindle motor. FIG. 1 (b) is the same as FIG.
3 is a schematic view of the optical pickup unit when viewed from the direction of the line BB of FIG. 2, and the optical pickup unit can be moved in a direction of an arrow along a seek axis 7 by a seek coil 6 as is well known.

The embodiment shown in FIG. 1 is an example of a drive device for a single-sided optical disk having no case such as a CD.
Is released (rotated in the direction indicated by R in the figure) and the optical disc 3
Is set. A pickup optical system is incorporated in the door 2 so that dust does not easily accumulate near the objective lens, and the opening of the optical pickup unit 4 (near the objective lens 5) faces downward. Therefore, the optical disc 3 is set with the recording surface facing downward, but the spindle motor 8 may be incorporated into the door 2 (as shown) or into the main body.

FIG. 2 is a view for explaining another embodiment of the optical disk drive according to the present invention. FIG. 2 (a) is an external perspective view, and FIG. 2 (b) is a C-C of FIG. 2 (a). FIG. 2 is a schematic view as viewed in the direction of arrow C, and portions having the same functions as in FIG. 1 are denoted by the same reference numerals as in FIG. This embodiment is an example of a drive device for a data optical disk having a case of a magneto-optical type or a phase change type. In this case as well, dust enters the device through the optical disk insertion slot 1a. To do
As shown in FIG. 2B, the optical pickup 4 is disposed above the optical disc 3 so that the opening (near the objective lens 5) of the optical pickup 4 faces downward.

FIG. 3 is a view for explaining the arrangement of the spindle motor. FIG. 3A shows an example of a conventional arrangement, and FIG.
Is an example of arrangement when applied to the present invention (FIG. 2).
a indicates a recording surface of the optical disc 3, 9 indicates a hub, and
1 and 2 are denoted by the same reference numerals as in FIGS. Generally, an optical disk 3 with a case
Has a hub 9 for chucking in the center, conventionally,
As shown in FIG. 3A, the spindle motor 8 is located below the optical disk.
As shown in FIG. 2B, a spindle motor 8 can be disposed above the optical disk 3, and the embodiment shown in FIG. 2 makes the whole apparatus compact as shown in FIG. Therefore, the spindle motor 8 is disposed above the optical disc 3 on the same side as the optical pickup unit 4.

[0015]

As is apparent from the above description, the present invention has the following effects. (1) An effect corresponding to claim 1; in the optical disk drive device in which the opening / closing door is opened and the optical disk is set in the device, the optical pickup unit is built in the opening / closing door, so that the vicinity of the objective lens in contact with the outside world of the optical pickup unit The opening is always downward during operation, so that dust is less likely to enter the optical pickup unit, and there is little possibility that the operator may accidentally touch it. In addition, since there is room in the main body, it is possible to add other additional functions. (2) An effect corresponding to claim 2; in an optical disk drive device for inserting an optical disk into the device from an insertion opening of a main body, an optical pickup unit is disposed above the optical disk and near an objective lens which is in contact with the outside of the optical pickup unit. With the opening of the optical pickup facing downward, dust hardly enters the optical pickup. Also, since the spindle motor can be arranged above the same side as the optical pickup unit with respect to the optical disk, the arrangement layout can have a margin and the entire apparatus can be made thin.

[Brief description of the drawings]

FIG. 1 is a configuration diagram for explaining an embodiment of an optical disk drive device according to the present invention.

FIG. 2 is a diagram for explaining another embodiment of the optical disk drive device according to the present invention.

FIG. 3 is a diagram for explaining an arrangement of a spindle motor of the optical disk drive device.

FIG. 4 is a diagram for explaining an example of an optical disk drive device according to the related art.

FIG. 5 is a diagram for explaining an example of an optical disk drive device according to the related art.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk drive main body, 2 ... Door, 3 ... Optical disk, 4 ... Optical pickup unit, 5 ... Objective lens,
6 ... seek coil, 7 ... seek shaft, 8 ... spindle motor, 9 ... hub.

Claims (2)

(57) [Claims] 1. A main body for storing an optical disk, and a door located above the main body and connected to the main body so as to be openable and closable, wherein the door is opened and the optical disk is attached to and detached from the main body. An optical disk drive device according to claim 1, wherein an optical pickup unit for recording and / or reproducing information on / from the optical disk is built in said door. 2. Recording information on an optical disc and / or
Alternatively, in an optical disk drive device in which an optical pickup unit for reproducing and a spindle motor are built in the device main body, and the optical disk is inserted into and removed from the device main body through an optical disk insertion port of the device main body, the optical pickup unit is located above the optical disk. An optical disk drive device, wherein a drive shaft of the spindle motor for driving the optical disk is disposed above the optical disk.