JP3137444B2 - 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 a dustproof and carriage lock mechanism for an optical disk drive.

[0002]

2. Description of the Related Art In a disk drive of a recording medium exchange type in which a recording medium such as an optical disk or a magneto-optical disk is exchanged and used, external air flows into the disk drive in order to make the recording medium exchangeable. In order to prevent dust and the like contained in the air from adhering to the objective lens and optical components of the optical head and increasing data errors, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 1-140623. There is proposed a dust contamination prevention technology that includes a shutter that opens and closes an opening provided above an objective lens of an optical head, and a solenoid that drives the shutter, and closes the shutter when not operating.

On the other hand, it is necessary to protect the optical head from external shocks when the disk drive device (hereinafter simply referred to as "drive device") is not operating to improve the reliability of the drive device. Has been proposed to drive the lock member to lock the optical head.

[0004]

However, in the former technique, a solenoid is provided as a driving means only for opening and closing the shutter, so that the cost is increased, and an opening like a separate type optical head is required. However, there is a problem that it cannot be applied to those having a plurality. on the other hand,
There is a problem that the latter drive device for locking the optical head is relatively complicated.

[0005] Therefore, in order to solve the above problems, the present invention realizes the prevention of dust on the drive device and the protection of the optical head from external impact with a simple configuration, and at the same time, the drive device is movable to increase the speed of the drive device. It is an object of the present invention to provide an optical disk drive device that can be applied to a separation type head for reducing the weight of a unit.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and the invention according to claim 1 has a recording disk, a spindle motor for rotating the disk, and In an optical disk drive device having a carriage provided with an optical head including an objective lens which is movably supported in a radial direction of the disk and records and reproduces data on the disk, a first cover for covering the objective lens
And a second position retracted from the objective lens, and engages with a part of the carriage when occupying the first position to restrain the movement of the carriage. A dust-proof lock member having an engagement portion, wherein the dust-proof lock member is selectively moved to the first position when the optical disk drive is not operated, and the dust-proof lock member is selectively moved to the second position when the optical disk drive is operated. And a driving means for moving the moving member.

According to a second aspect of the present invention, in order to achieve the above-mentioned object, in the optical disk drive device according to the first aspect, when the dustproof lock member occupies the first position, it comes into contact with the objective lens. The configuration is such that a flexible member is provided at the site.

According to a third aspect of the present invention, there is provided a recording disk, a spindle motor for rotating the disk, a light source and a photodetector. A fixed optical head having a first opening for passing the light from the first opening, a second opening for receiving the light from the first opening, and an objective lens and a second passage for passing the light from the objective lens. A third aperture, receives the light from the second aperture, focuses the light on the disc through the third aperture by the objective lens, and moves in a radial direction of the disc. An optical disc drive device comprising a movable optical head movably supported and a separation type head, wherein each of the openings provided near each of the first opening, the second opening and the third opening. A first opening / closing member, a second opening / closing member, and a third opening / closing member respectively supported so as to be openable and closable, a first position for engaging with each opening / closing member and covering each opening, The movable optical head is displaceable between a second position in which the opening / closing member is engaged and the respective opening / closing members are retracted from the openings, and a part of the movable optical head when the first position is occupied. A pressing lock member having an engaging portion for engaging and restraining movement of the moving optical head; and a pressing lock member at the first position when the optical disk drive is not operating, and when the optical disk drive is operating. Driving means for selectively moving the pressing lock member to the second position.

[0009]

According to the first aspect of the present invention, when the first position covering the optical head and the second position retracted from the optical head are displaceable and occupy the first position. A dust-proof lock member having an engaging portion that engages with a part of the carriage to restrain the movement of the carriage; a dust-proof lock member at a first position when the optical disk drive is not operating; and a dust-proof lock when the optical disk drive is operating. Drive means for selectively moving the lock member to the second position.
When the optical disk drive is not operating, the movement of the carriage is restricted, and the optical head is protected from dust.

According to the second aspect of the present invention, the flexible member is provided at a position where the dustproof lock member contacts the objective lens when the dustproof lock member occupies the first position. Is cleaned.

According to the third aspect of the present invention, with the above-described configuration and means, the movement of the movable optical head is restricted even when the optical disk drive is not operating, even in the optical disk drive having the separated optical head. In addition, dust is prevented for each opening of the movable optical head and the fixed optical head.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Unless otherwise specified, the directions of objects on the drawings are expressed in the up, down, left, and right directions.

First, referring to FIG. 1 and FIG.
Alternatively, a configuration of a drive device as an embodiment corresponding to the invention described in 2 or 2 will be described. In the drive device shown in FIG. 1, a loading mechanism for inserting or ejecting a well-known recording disk (not shown), a spindle motor 1 for rotating the disk, a seek motor 2 supported movably in the radial direction of the disk, , 3 are provided at respective positions shown in the figure with a carriage 5 having an optical head 4 for recording and reproducing data on the disk.

In FIGS. 1 and 2, the optical head 4 comprises a light source, a photodetector, various prisms (both not shown), and an objective lens 6, and has a sealed structure except for the objective lens 6. Reference numeral 7 denotes a lock pin. The lock pin 7 is implanted at a predetermined position on the carriage 5. Reference numeral 8 denotes a dustproof lock member. This dustproof lock member 8 has two U-grooves 8a provided above the carriage 5 for engaging with the lock pins 7 at predetermined positions at the lower end thereof, and one end side (left side in the drawing) of the U-groove 8a. Is formed with a tongue-shaped dustproof portion 8b offset one step higher than the U groove 8a. The dustproof portion 8b is freely movable together with the dustproof lock member 8 in directions indicated by arrows A and B for opening and closing the objective lens 6. On the right side of the dustproof lock member 8, a guide flange portion 8c bent at a right angle is formed at a lower portion thereof. A pin 11 is fixedly provided substantially at the center of the guide flange 8c. A plunger hole 8h is formed on the right surface of the dustproof lock member 8.

In the vicinity of the right end of the dustproof lock member 8, an angle-shaped guide plate 12 is screwed and fixed to a base of a drive device (not shown) with screws b. The guide plate 12 has an elongated hole 12s formed substantially at the center of the vertical surface. A solenoid 9 is installed near the upper right end of the dustproof lock member 8. A rod-shaped plunger 10 is provided below the solenoid 9. A support fastening portion 10 a is formed at the tip of the plunger 10, and the support fastening portion 9 a is caulked to a plunger hole 8 h of the dustproof lock member 8. A coil spring 13 is provided on the outer periphery of the plunger 10 and constantly urges the dustproof lock member 8 in the direction of arrow B. And the pin 11 of the guide flange portion 8c of the dustproof lock member 8 is
The guide plate 12 is slidably engaged with the elongated holes 12s in the directions of arrows A and B, so that the slide is smoothly performed.

Next, the operation of the drive device will be described. When the drive device operates, the solenoid 9 is turned on, and the dustproof lock member 8 coupled to the plunger 10 moves in the direction of arrow A by the suction operation of the plunger 10. Therefore, the dustproof portion 8b is retracted from above the objective lens 6, and at the same time the objective lens 6 is opened, the engagement between the lock pin 7 and the U groove 8a is released, and the locked state of the carriage 5 is released. .

When the drive device is not operating, the solenoid 9 is turned off, and the dust-proof lock member 8 moves in the direction of arrow B in the direction opposite to the direction when the solenoid 9 is turned on by the urging force of the coil spring 13. Accordingly, the dustproof portion 8b covers the objective lens 6, and when the objective lens 6 is closed, the lock pin 7 and the U groove 8a are engaged at the same time, and the carriage 5 is locked.

According to the present embodiment, the movement and movement of the carriage 5 are restrained when the drive device is not operated and dust is prevented from the optical head 4 by the above-described structure and operation. Protection from impact and dust prevention on the optical head 4 can be simultaneously performed by one drive means (solenoid 9), and a highly reliable drive device can be provided.

FIG. 3 shows another embodiment of the present invention, and the same components as those of the above-described embodiment are denoted by the same reference numerals. In the figure, reference numeral 14 denotes a flexible member. The flexible member 14 is adhered and fixed to the lower surface of the dustproof portion 8b of the dustproof lock member 8 at a position where the flexible member 14 comes into contact with the objective lens 6. The flexible member 14 turns on / off the solenoid 9.
The OFF operation not only opens and closes the objective lens 6 but also cleans the objective lens 6. As a matter of course, the material of the flexible member 14 is flexible so as not to damage the objective lens 6, and is made of, for example, a sponge to which a lens cleaner cloth is attached.

Next, referring to FIGS. 4 and 5, the structure and operation of a drive device as an embodiment corresponding to the third aspect of the present invention will be described. This drive device is shown in FIG.
The carriage 5 provided with the optical head 4 of the drive device shown in FIG. 2 to FIG. 2 has a well-known separated type head which is divided into two functions as described below.

In FIG. 4, reference numeral 20 denotes a fixed optical head, and reference numeral 15 denotes a movable optical head. The fixed optical head 20 has a housing structure, in which a light source and a photodetector (both not shown) are incorporated. Symbol 20S
Indicates a side surface of the fixed optical head 20 in the figure. This side 20
S is a first for transmitting light from a light source (not shown).
An opening 18H is provided. In the vicinity of the lower right of the first opening 18H, a lug-shaped first opening / closing member 18 that opens and closes the first opening 18H is pivotally connected with a shaft 18s. The first opening / closing member 18 is retracted from the first opening 18H by a torsion coil spring 180 having one end fixed to a part of the first opening / closing member 18 and the other end fixed to a part of the side surface 20S. The opening behavior of opening the first opening 18H is given. The rotation of the first opening / closing member 18 due to the rotation behavior is such that the first opening / closing member 18 is moved to the first opening 18H.
In the open position, the chord portion 18g is restricted by abutting against a protrusion of a pressing lock member 19 described later.

The moving optical head 15 has a substantially convex housing structure. Reference numeral 15S indicates a lower side surface of the movable optical head 15. The lower side surface 15S has a first opening 18H.
A second opening 17H for receiving light from the light source is formed. A lug-shaped second opening / closing member 17 for opening and closing the second opening 17H is provided near the lower right of the second opening 17H.
It is pivoted at 7s. The second opening / closing member 17 is retracted from the second opening 17H by a torsion coil spring 170 having one end locked to a part of the second opening / closing member 17 and the other end locked to a part of the side surface 15S. , Second
The turning behavior of opening the opening 17H is given.
The rotation of the second opening / closing member 17 due to the rotation behavior is such that the chord portion 17g contacts a projection of a pressing lock member 19 described later in a state where the second opening / closing member 17 has opened the second opening 17H. Limited by contact.

Reference numeral 15T denotes the upper surface of the convex housing of the movable optical head 15. The second opening 1 is provided on the upper surface 15T.
A third opening 16H for receiving the light from 7H through an optical component such as a triangular prism (not shown) is formed. In the vicinity of the right side of the third opening 16H, a lug-shaped third opening / closing member 16 is pivotally mounted on a shaft 16s. The third opening / closing member 16 is retracted from the third opening 16H by a torsion coil spring 160 having one end locked to a part of the third opening / closing member 16 and the other end locked to a part of the upper surface 15T. The opening behavior of opening the third opening 16H is given. Third opening / closing member 1 based on this rotation behavior
The rotation of 6 is restricted when the third opening / closing member 16 has opened the third opening 16H and the chord 16g abuts on a projection of a pressing lock member 19 described later.

Reference numeral 19 denotes a pressing lock member. The pressing lock member 19 is provided above the fixed optical head 20 and the movable optical head 15. Reference numeral 19B indicates a main body of the pressing lock member, and has a rectangular shape long in the left-right direction. On one end side (right side in the figure) of the press lock member 19, a rectangular guide slide portion 19S is provided.
It is formed so as to be one step lower than 9B. A projecting first pressing projection 19a is formed at a predetermined position on the diagonally left end of the guide slide 19S. On the other end side (left side in the figure) of the pressure lock member 19, a guide lock portion 19L which is bent at a right angle and offset one step higher is formed at the upper part thereof. A projecting third pressing projection 19c is formed at the lower left end of the guide lock 19L. A projecting second pressing projection 19b is formed at a predetermined position at the lower left end of the main body 19B. A lock portion 19l is formed at the left end of the second pressing protrusion 19b, and is configured to abut on the lower side surface 15S of the movable optical head 15 and lock on the inner peripheral side thereof. The first pressing projection 19a formed on the pressing locking member 19 is provided on the chord 18g of the first opening / closing member 18, the second pressing projection 19b is provided on the chord 17g of the second opening / closing member 17, and the third pressing projection. Reference numerals 19c engage with the chords 16g of the third opening / closing member 16, respectively, so as to abut at predetermined positions.

A plunger hole 19h is formed in the surface of the pressing lock member 19 near the right end. The configuration in which the plunger hole 19h is connected by a support fastening portion 9a provided at one end of the plunger 10 is shown in FIG.
The configuration is the same as that of the drive device shown in FIG.

Next, the operation of the drive device will be described. As shown in FIGS. 4 and 5, when the drive device is operated, the solenoid 9 is turned on, and the pressing lock member 19 coupled and supported by the plunger 10 is moved in the direction of arrow A in FIG. It moves smoothly in response to the guidance of the sliding operation with the guide slide 19S. Therefore, the chord portion 18g and the first pressing protrusion 1
9a, chord 17g, second pressing projection 19b, and chord 16
g and the third pressing protrusion 19c move in the direction of arrow A in the drawing, and the respective torsion coil springs 160, 17
The opening / closing members 16, 17, 18 urged in the opening direction by 0, 180 also move in the direction of arrow A, so that the openings 16H, 17H, 18H are opened. Simultaneously with this operation, the contact lock state between the lock portion 19l of the pressing lock member 19 and the lower side surface 15S of the movable optical head 15 is released.

When the drive device is not operating, the solenoid 9 is turned off, and the urging force of the coil spring 13 causes the pressing lock member 19 to move in the opposite direction (the direction of arrow B in the drawing) when the solenoid 9 is turned on. Therefore, the third opening 16H is the third opening / closing member 16, and the second opening 17H is the second opening / closing member 16.
The opening / closing member 17 and the first opening 18H are the first opening / closing member 18
At the same time, the lock portion 19l of the pressing lock member 19 and the lower side surface 15S of the movable optical head 15 abut and are locked. Here, the spring load of the coil spring 13 provided on the plunger 10 is appropriately larger than the sum of the spring loads of the torsion coil springs 160, 170 and 180, and the total sum of the static friction force between the side surface 20S and the guide slide 19S. Is set to

According to this embodiment, due to the above-described configuration and operation, even in the drive device having the separated optical head, the movement of the movable optical head 15 is restricted while the drive device is not operating, and the movable optical head 15 In addition, since dust is prevented for the openings 18H, 17H, and 16H of the fixed optical head 20, the movable optical head 15 can be protected from external shocks and the openings 18H, 17H can be protected by a simple configuration.
H and 16H can be simultaneously dust-proofed by one drive means (solenoid 9).

The drive device according to the present invention is not limited to the above-described embodiment, but each opening / closing member 16, 17, 18 and each torsion coil spring 160, 170, 180 are eliminated, and each pressing projection 19a of the pressing lock member 19 is eliminated. , 19b, 19c
Are provided with opening / closing members 16, 17, and 18, respectively.
A dustproof shielding function such as the dustproof portion 8b of the embodiment in FIG. 2 may be provided.

[0030]

As described above, according to the first aspect of the present invention, it is possible to displace between the first position covering the optical head and the second position retracted from the optical head, First
A dust-proof lock member having an engaging portion that engages with a part of the carriage to restrain the movement of the carriage when the optical disk drive device is occupied; A drive unit for selectively moving the dustproof lock member to the second position when the drive device is operated, whereby movement of the carriage is restricted when the optical disc drive device is not operated and dust is prevented on the optical head. Therefore, with a simple structure, protection of the carriage from external impact and dustproofing of the optical head can be simultaneously performed.

According to the second aspect of the present invention, the flexible member is provided at a position where the dustproof lock member comes into contact with the objective lens when the dustproof lock member occupies the first position. Since the lens is cleaned, it is possible to provide an optical disk drive device having a more excellent dustproof effect.

According to the third aspect of the present invention, with the above configuration and means, the movement of the movable optical head is restricted even when the optical disk drive is not operating, even in the optical disk drive having the separated optical head. Since dust is prevented for each opening of the moving optical head and the fixed optical head, it is possible to simultaneously protect the moving optical head from external shocks and dust for each opening with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a plan view of an entire configuration showing an embodiment of the invention described in claim 1;

FIG. 2 is a perspective view showing a main part of FIG.

FIG. 3 is a sectional view of an essential part showing one embodiment of the invention described in claim 2;

FIG. 4 is a perspective view of an essential part showing an embodiment of the invention described in claim 3;

FIG. 5 is a plan view of a main part for explaining an opening / closing operation of an opening of an arrow C section according to the embodiment of FIG. 4, and FIG.
FIG. 2B shows the closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spindle motor 4 Optical head 5 Carriage 6 Objective lens 7 Lock pin 8 Dustproof lock member 8a U groove as an engagement part of a dustproof lock member 9 Solenoid as drive means 10 Plunger 13 Coil spring 14 Flexible member 15 Moving optical head 15S Lower side surface of movable optical head 16 Third opening / closing member 16H Third opening 17 Second opening / closing member 17H Second opening 18 First opening / closing member 18H First opening 19 Press lock member 19l As engagement portion of press lock member Lock part 20 fixed optical head

Claims (3)

(57) [Claims] 1. A carriage comprising a recording disk, a spindle motor for rotating the disk, and an optical head including an objective lens supported to be movable in a radial direction of the disk and recording and reproducing data on the disk. An optical disk drive device, wherein the carriage can be displaced between a first position covering the objective lens and a second position retracted from the objective lens, and the carriage moves when the first position is occupied. A dust-proof lock member having an engaging portion that engages with a portion to restrain movement of the carriage; and moving the dust-proof lock member to the first position when the optical disk drive is not operating, and when the optical disk drive is operating. An optical disk drive, comprising: driving means for selectively moving the dustproof lock member to the second position. Location. 2. An optical disk drive according to claim 1, wherein a flexible member is provided at a position where said dustproof lock member abuts on said objective lens when said dustproof lock member occupies said first position. Drive device. 3. A fixed optical head having a recording disk, a spindle motor for rotating the disk, a light source, a photodetector, a first opening for passing light from the light source, A second opening for receiving the light from the first opening and a third opening for passing the light from the objective lens and the objective lens;
Moving optics that receives the light from the second opening, focuses the light on the disc through the third opening by the objective lens, and is movably supported in the radial direction of the disc. An optical disk drive device comprising a separation type head comprising: a head; A first opening / closing member, a second opening / closing member, and a third opening / closing member supported respectively; a first position engaging with each opening / closing member and covering each opening; The movable optical head is displaceable between a second position where the opening and closing members are retracted from the opening, and engages with a part of the movable optical head when occupying the first position. Has an engagement part that restricts the movement of A pressing lock member, and a driving unit for selectively moving the pressing lock member to the first position when the optical disk drive is not operating and the second position when the optical disk drive is operating. An optical disk drive device comprising: