JP3079957B2 - Disk unit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive, and more particularly to a disk drive incorporated in a notebook computer or the like as a CD-ROM drive.

[0002]

2. Description of the Related Art As a storage medium for storing information such as a database and software, for example, a compact disk (12 cm in diameter) reproduced by a laser pickup is used.
Or 8 cm) is being used. Therefore, a built-in disk device (CD-ROM drive device) built in a case has been developed so that it can be incorporated in a miniaturized notebook computer or the like.

In a conventional apparatus, a tray on which a disk is placed is driven by a motor. When the tray moves out of the case, the disk is placed on a turntable in the tray, and the tray is again driven by the driving force of the motor. Is returned to the case. However, the method of driving the tray with a motor as described above requires a motor for driving the tray and a transmission mechanism for transmitting the driving force to the tray,
It was difficult to reduce the size and thickness of the device, and it could not be incorporated into the case of a notebook computer.

[0004] Therefore, a disk device has been developed which eliminates the need for the motor and transmission mechanism as described above and moves the tray to a disk mounting position in the case or a disk replacement position outside the case by manual operation. FIG. 17 shows an example of this type of disk drive. FIG. 1 shows the back surface of the pickup unit 100 disposed on the tray of the disk device. The pickup unit 100 is moved between a disk mounting position in the case and a disk replacement position outside the case by manual operation of the tray.

The pickup unit 100 includes a base 101,
Optical pickup 102, pickup driving unit 10
3, a pickup driving motor 104, a disk motor 105 and the like. The base 101 is configured to have a small thermal deformation by mixing glass fibers into a resin. The pickup 102 reproduces information recorded on the disk, and is configured to be movable in directions indicated by arrows X1 and X2 in the drawing by a pickup driving unit 103 and a pickup driving motor 104 described later. The disk motor 102 is disposed on a base member (not shown), and has a configuration in which a turntable is connected to a drive shaft thereof. Therefore, the disk placed on the turntable rotates at a predetermined rotational speed by the rotational driving force of the disk motor 102. .

The pickup driving unit 103 includes a plurality of gears 1.
The gears 106a to 106c mesh with a gear 107 provided on an output shaft of the pickup driving motor 104. The gear 106c is connected to the pickup 10
2, the rotational force of the pickup driving motor 104 is transmitted to the pickup 102 via the pickup driving unit 103 and the lead screw 108, and the pickup 1
02 moves in the X1 and X2 directions.

Conventionally, the gears 106a and 106b are configured to be supported by supporting shafts 110a and 110b press-fitted into a holder 109 formed integrally with the base 101, and a gear 106c is provided. Lead screw 1
08 was also configured to be supported by the holder 109.

[0008]

In the above-described conventional apparatus, the support shaft 110 in which the gears 106a and 106b are press-fitted into a holder 109 formed integrally with the base 101 is provided.
a, 110b. The base 101 is formed of a resin mixed with glass fibers in order to prevent thermal deformation. As described above, by incorporating glass fibers into the resin, thermal expansion is suppressed, and the base 101 has good thermal characteristics.

However, the resin mixed with glass fiber is
As described above, it has good properties thermally, but has high mechanical properties (that is, becomes brittle) as mechanical properties. Therefore, in the configuration in which the support shafts 110a and 110b are press-fitted into the holder portion 109 formed integrally with the base 101 formed of a resin having brittle characteristics, the holder portion 109 is press-fitted when the support shafts 110a and 110b are press-fitted.
There is a problem that cracks may occur in the steel. Also, if a crack occurs, there is a problem that the entire base 101 becomes defective because the holder 109 alone cannot be replaced, and the product yield deteriorates.

Further, generally, the holder portion 109 is
1, the support shafts 110a, 110
It is difficult to press-fit b and to arrange the gears 106a and 106b on the support shafts 110a and 110b, and there is also a problem that the assemblability is poor.

The present invention has been made in view of the above points, and an object of the present invention is to provide a disk drive capable of improving the yield and the assemblability.

[0012]

In order to solve the above-mentioned problems, the present invention uses a pickup for performing at least reproduction processing on a disc and a gear supported by a holder.
The drive force of the pickup drive motor
A disk drive including a pickup drive mechanism for transmitting the pickup to the pickup and driving the pickup, and a base on which the pickup and the pickup drive mechanism are disposed, wherein the base is formed of resin mixed with glass fiber.
And the holder is not mixed with the glass fiber.
The pickup drive mechanism is formed of a resin and is independent of the base , and the pickup drive mechanism can be mounted on the base.

As described above, according to the present invention, the pickup driving mechanism can be independently mounted on the base, so that the material forming the pickup driving mechanism can be formed of a material different from the material forming the base. It becomes possible. Based on this, in the present invention, the base is made of glass fiber
The holder is made of glass mixed with glass fiber.
It is configured to be formed of resin that is not inserted. Yo
Therefore, the base is formed of resin mixed with glass fiber.
By doing so, the effect of thermal expansion can be reduced.
Also, the holder that constitutes the pickup drive mechanism is made of glass
By forming with resin which fiber is not mixed
This makes it possible to make the resin that constitutes the holder flexible.
To prevent the holder from cracking when the gear is mounted.
it can.

Also, since the pickup drive mechanism can be assembled while being detached from the base,
The workability of assembling the pickup drive mechanism can be improved as compared with a configuration in which the pickup drive mechanism is integrated with the base.

[0015]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 3 show an embodiment of a disk drive according to the present invention. In each figure, a CD-ROM drive device 1 (hereinafter, referred to as “device”) as a disk device is a self-contained device built in a housing of a notebook personal computer (not shown). 1 is a plan view of the apparatus 1, FIG. 2 is a bottom view of the apparatus 1, and FIG. 3 is an exploded perspective view of the apparatus 1.

The apparatus 1 generally comprises a tray 2 for receiving a disk (not shown),
, A tray sliding mechanism 4 for slidably supporting the tray 2, an optical pickup unit 5 provided on the sub-chassis 3, and a disc (CD-ROM) mounted thereon. A turntable 6 that is driven to rotate;
A locking mechanism 7 (shown in FIGS. 9 and 10) for locking the tray 2 when the tray 2 is moved to the disk exchange position, a locking mechanism 8 for locking the tray 2 when the tray 2 is moved to the disk mounting position, and the like. It consists of.

FIG. 1 shows a state where the tray 2 (shown by a dashed line in FIG. 1) from which the cover 9 shown in FIG. FIG. 2 also shows the bottom surface in a state where the tray 2 is at the disk mounting position.

The tray 2 is formed such that a width of the disk (not shown) is smaller than an outer diameter of the disk so that a part of the disk (not shown) protrudes from the tray 2. Further, the tray 2 is configured to be slidable in the directions of arrows A and B in the figure by manual operation by a tray sliding mechanism 4 described later.
1 and 2, the tray 2 is inserted in the direction of arrow B and is located at the disk mounting position as described above, and is pulled out in the direction of arrow A to exchange the disk with the tray 2. Go to

As described above, the device 1 according to this embodiment is
Since the tray 2 is moved in the directions A and B by manual operation, the number of components can be reduced as compared with the configuration in which a drive mechanism (including a motor and a transmission mechanism) is provided. Reference numeral 10 denotes a chassis, which is a storage unit 10a for storing each of the above mechanisms, and a cover unit 10 that covers the lower part of the protruding disk to protect the disk protruding from the tray 2.
b. The space below the cover 10b is a space, for example, where other devices in the notebook computer to which the device 1 is to be mounted are arranged.

Reference numeral 11 denotes a front bezel, which is fixed to the front end of the tray 2 and therefore slides in the A and B directions integrally with the tray 2. At the center of the front bezel 11, a switch button 12 for releasing a lock by a lock mechanism 8 described later when pulling out the tray 2 is provided. Therefore, when the switch button 12 is turned on in the state shown in FIGS. 1 and 2, the front bezel 11 projects a predetermined amount in the A direction with respect to the chassis 10 as described later, and the tray 2 can be easily pulled out. It is configured to be.

As shown in FIG. 3, the tray 2 has a disk facing surface 2 which forms a space for the disk to face.
a, a pickup and turntable opening 2b formed in the disk facing surface 2a, and a disk facing surface 2a.
And an arc-shaped concave portion 2c for ejecting a disc into which a finger is inserted when ejecting a disc placed on the disc.

The disk facing surface 2a has a width smaller than the outer diameter of the disk so as to cover the storage portion 10a of the chassis 10, and is formed so as to cover about 約 of the area of the disk. As a result, the size of the device 1 can be reduced. 3 and FIG.
As shown in FIGS. 1 and 12, a rectangular frame 3a having an opening on which the tray 2 is placed and fixed and a drive unit 21 having the pickup unit 5 and the turntable 6 is disposed, and the frame 3a. A lock mechanism disposing portion 3b formed thereon, on which a lock mechanism 8 described later is disposed, a boss 3c for fixing the drive unit 21, a screw hole 3d for fixing the tray sliding mechanism 4, and the like. Is formed.

As shown in FIGS. 3, 4, 9 and 10, the tray sliding mechanism 4 has a pair of guide rail mechanisms 15 and 16 attached to both sides of the sub-chassis 3. The guide rail mechanisms 15 and 16 are attached to the sub-chassis 3 by screwing a screw 13 into a screw hole 3d formed in the frame 3a.

Hereinafter, the guide rail mechanisms 15 and 16 will be described. Since the guide rail mechanisms 15 and 16 have the same configuration, only the guide rail mechanism 15 will be described below. The pair of guide rail mechanisms 15
A movable rail 17 fixed to the bracket 3b of the sub-chassis 3 and a fixed rail 1 extending parallel to the movable rail 17 and fixed to the side wall 10c of the chassis 10, respectively.
8 and a slide rail 19 interposed between the movable side rail 17 and the fixed side rail 18 and slidably engaged with both members.

Movable rail 17 and fixed rail 18
Has a C-shaped section, and a rack extending in the longitudinal direction (only the rack 17a of the movable rail 17 appears in FIG. 4) at the edges of the movable rail 17 and the fixed rail 18. Each is provided. The slide rail 19 has an H-shaped cross section, and the movable rail 1
7 and the fixed side rail 18 are configured to engage with each other. Further, a pinion (not shown) is rotatably housed at an intermediate position in the longitudinal direction of the slide rail 19, and this pinion meshes with a rack formed on the movable rail 17 and the fixed rail 18. I have.

Therefore, when the tray 2 is pulled out, the pinion 20 is rotated while the fixed rail 18 slides in the direction A with respect to the slide rail 19. This pinion 20
With the rotation of the slide rail 19, the movable rail 17
Slides in the direction A. As described above, in the guide rail mechanism 15 according to the present embodiment, the slide rail 19 interposed between the fixed rail 18 and the movable rail 17 is slidably engaged with the fixed rail 18 and the movable rail 17. Therefore, the movable side rail 17 can move with a stroke that is about twice the moving amount of the slide rail 19.

Thus, the guide rail mechanism 15 (1
6) makes it possible to lengthen the area for guiding the tray 2, so that the tray 2 can be reliably held from the disk mounting position in the chassis 10 to the disk replacement position outside the chassis 10. When the tray 2 is at the disk mounting position, the rails 17 to 19 are housed in the chassis 10 as shown in FIG.

When the tray 2 is pulled out in the direction A, it is necessary to restrict further movement of the tray 2 when the tray 2 reaches the disk exchange position. For this reason, the apparatus 1 is provided with a locking mechanism 7 for preventing the tray 2 from being pulled out in the direction A beyond the disc replacement position. The locking mechanism 7 will be described later for convenience of explanation.

Next, the drive unit 21 provided with the pickup unit 5, the turntable 6, and the like will be described with reference to FIGS. As described above, the drive unit 21 is disposed above the sub-chassis 3. The drive unit 21 includes a turntable 6, a base 22 mounted on the upper portion of the sub-chassis 3, a pickup unit 5 movably mounted on the base 22, and a pickup drive unit for moving the pickup unit 5 in the disk radial direction. 23, a disk motor 20 for rotating the turntable 6, and the like.

The above-described tray 2 includes a drive unit 2
It is attached to the upper part of one base 22. At this time, an anti-vibration member 55 that absorbs vibration is provided between the sub-chassis 3 and the base 22. For this reason, since the vibration of the pickup unit 5 and the turntable 6 attached to the base 22 is absorbed by the vibration isolating member 24, the influence of the vibration during the sliding operation of the tray 2 is reduced.

The base 22 is formed of a resin into which glass fibers are mixed, so that the coefficient of thermal expansion is close to the coefficients of thermal expansion of the pickup unit 5 and the turntable 6. With this configuration,
Even if a thermal environment change occurs, the dimensional accuracy between the base 22 and the pickup unit 5 and the turntable 6 can be maintained with high accuracy.

The pickup driving section 23 has a function of moving the pickup section 5 in the directions of arrows C and D in the figure.
6, a pickup driving motor 25 and a gear 2
A pickup driving mechanism 29 provided with 7, 28, a lead screw 30 driven via the pickup driving mechanism 29, and a guide section extending parallel to the lead screw 30 and guiding the movement of the pickup section 5. 31 and the like, and have an integrated configuration.

In the above configuration, since the pickup section 5 has the engaging section 32 that engages with the threaded section of the lead screw 26, the pickup driving motor 24 rotates, and the rotation force causes the pickup driving mechanism 29 to operate via the pickup driving mechanism 29. When the lead screw 26 is driven to rotate, the pickup unit 5 moves in the disk radial direction (C and D directions). Further, a long hole 22 a is formed in the base 22, and the position where the long hole 22 a is formed is configured to correspond to the moving direction of the pickup unit 5. Therefore, the pickup section 5 is always configured to face the disk over its moving range.

Here, the pickup driving mechanism 29 will be described in more detail with reference to FIGS. As described above, the pickup drive mechanism 29 is configured to include the gears 27 and 28. Each of the gears 27 and 28 is rotatably mounted on a mounting holder 33 formed of resin. Specifically, the gear 27 is rotatably supported by a support shaft 34 press-fitted into the mounting holder 33, and the E-ring 3
By arranging 5, detachment from the support shaft 34 is prevented.

The gear 28 is disposed integrally with the shaft end of the lead screw 26, and this shaft end is inserted through a bearing hole 36 formed in the mounting holder 33 and is supported by the shaft. A leaf spring 37 is provided on the back side of the mounting holder 33 opposite to the surface on which the support shaft 34 is press-fitted. The leaf spring 37 presses a shaft end protruding from the bearing hole 36. I have. Therefore, the lead screw 26 is urged in the direction of arrow D in the figure.

On the other hand, the base 22 has a lead screw 2
A bearing portion 38 is formed to support the end of arrow 6 in the direction of arrow D. Accordingly, since the lead screw 26 is supported by the plate spring 37 while being pressed against the bearing portion 38, the lead screw 26 has high positional accuracy, and the pickup portion 5 can be moved with high accuracy. .

The mounting holder 33 has a base 22.
The engagement claws 39 and 40 and the rib 41 are formed corresponding to the three mounting holes 22b (only one is shown in FIG. 7) formed in the above. The mounting holder 33 is fixed to the base 22 by engaging the engaging claws 39 and 40 and the rib 41 with the mounting hole 22b.

The pickup driving mechanism 2 having the above configuration
In 9, the attachment holder 33 is formed of a member separate from the base 22. As described above, the base 22 is formed of a resin mixed with glass fiber in order to approximate the coefficient of thermal expansion with the pickup unit 5 and the turntable 6. On the other hand, since the mounting holder 33 is a separate member from the base 22 as described above, it is not necessary to use the same resin. Therefore, in this embodiment, the mounting holder 33 is formed of a resin into which glass fiber is not mixed. doing.

The resin mixed with glass fiber can reduce the coefficient of thermal expansion, but has a high hardness (ie, becomes brittle). Therefore, in the configuration in which the holder portion for supporting the support shaft 34 on the base 22 is integrally formed. When the support shaft 34 is press-fitted, the holder may be broken.

On the other hand, in this embodiment, since the mounting holder 33 into which the support shaft 34 is press-fitted is formed as a separate member from the base 22, the mounting holder 33 can be formed of a material different from the material forming the base 22. Becomes Therefore, as described above, in this embodiment, the mounting holder 33 is formed of a resin into which glass fiber is not mixed. The resin in which the glass fiber is not mixed has flexibility compared to the resin in which the glass fiber is mixed.
The mounting holder 33 is not cracked even if press-fitting is performed.

Accordingly, the mounting holder 33 as in this embodiment is used.
And the base 22 have different personalities, so that the support shaft 34
Can be easily performed, and the yield can be improved. Further, as compared with a configuration in which the pickup drive mechanism is integrated with the base, the gears 27 and 28, the lead screw 30 and the like can be easily assembled to the mounting holder 33, and the assembling workability can be improved.

Next, the turntable 6 will be described. The turntable 6 is configured to be directly connected to a drive shaft of a disk motor 20 disposed below the turntable 6. When the tray 2 arrives at the disk mounting position in the apparatus 1, the disk motor 20 drives the disk clamped on the turntable 6 to rotate.

The disc motor 20 is fixed to a motor base member 42 as shown in FIGS. Then, this motor base member 42 is
By fixing the disk motor 20 and the turntable 6 integrated with the disk motor 20 to the base 22 by using screws 43 as shown in FIG.

Here, the electrical wiring of the drive unit 21 will be described. As described above, the drive unit 21 is provided with electric components such as the pickup unit 5, the disk motor 20, the pickup drive motor 25, and the like, and the electric components 5, 20, and 25 are provided on the chassis 10. It is necessary to connect to the circuit board 44. This circuit board 4
Reference numeral 4 denotes a signal processing circuit for performing signal processing on the reproduced signal generated by the pickup unit 5, and motors 10 and 25.
Is provided.

Since the drive unit 21 moves in the directions of arrows A and B in the figure as described above, the connection between the drive unit 21 and the circuit board 44 is made using the flexible board 45. The circuit board side end of the flexible board 45 is connected to a connector 46 provided on the circuit board 44. In this embodiment, as shown in FIGS. 4 and 5, the drive unit side end of the flexible board 45 is connected to the connector 4 provided on the motor base member 42.
7 (terminal).

Conventionally, the drive unit side end of the flexible board 45 is connected to a connector provided on a printed circuit board provided on the bottom surface of the drive unit. Further, the connection between each electric component and the connector has been performed using a wiring pattern formed on a printed circuit board.

On the other hand, in this embodiment, the connector 47 connected to the flexible board 45 is provided on the motor base member 42 as described above. The motor base member 42 is conventionally provided as a member for fixing a disk motor. In this embodiment, the motor base member 42 is used as a member for providing a connector 47.

With this configuration, the motor base member 42 can have a function equivalent to that of a conventional printed circuit board, so that a conventionally required printed circuit board can be eliminated. Thereby, the drive unit 21
Of the device 1 can be reduced, and thus the device 1 can be reduced in thickness. Further, since a conventionally required printed circuit board is not required, the number of components can be reduced, and the product cost can be reduced.

By the way, in this embodiment, since the printed circuit board is not provided as described above,
There is a problem in wiring for connecting the electrical components 7 to the respective electric components 5, 20, 25. Therefore, in this embodiment, the flexible substrate 48
The connector 47 is connected to each of the electric components 5, 20, and 25 using an intra-unit connection FPC 48.

As shown in FIG. 4, the in-unit connection FPC 48 is directed toward a base 48a fixed to the front side surface of the chassis 10 by screws 50, and from the base 48a to a solenoid 49 constituting a lock mechanism 8 described later. A first extending portion 48b extending from the base portion 48a and a second extending portion 48c extending from the base portion 48a toward the pickup driving motor 25;
Third extension part 48d extended toward the pickup part 5
And a fourth extension 48e connecting the base 48a and the connector 47. The electrical connection between the disk motor 20 and the connector 47 is made using printed wiring formed on the motor base member 42.

In this embodiment, each of the electric components 5, 20, 2
FPC4 for connection within the unit for connection between connector 5 and connector 47
Although 8 is used, a lead wire or a jumper wire may be used instead. Subsequently, the locking mechanism 7 will be described again with reference to FIGS. 9 and 10. Locking mechanism 7
Is a mechanism for restricting further movement of the tray 2 when the tray 2 moves to the disk exchange position as described above. The locking mechanism 7 includes a locking lever 5 provided at an end of the movable rail 17 provided in the tray 2 in the direction of arrow B.
1, an engaging pin 54 that stands on the movable rail 17 and engages with two long holes 52, 53 formed in the locking lever 51.
55, a coil spring 56 for urging the locking lever 51 in the direction of arrow B, an engagement projection 57 disposed near the end of the chassis 10 in the direction of arrow A, and the like.

When the long holes 52 and 53 are engaged with the engagement pins 54 and 55, the locking lever 51 moves the movable rail 17
In contrast, it is configured to be movable in the directions of arrows A and B over the formation range of the long holes 52 and 53. That is, the locking lever 5
1 moves to the first position (projected by the amount indicated by arrow L in FIG. 10A) from the rear end of the tray 2 by moving in the direction of arrow A, and by moving in the direction of B. It moves to the second position located inside the tray 2.

An engaging claw 58 that engages with an engaging projection 57 formed on the chassis 10 is formed below the end of the locking lever 51 in the direction of the arrow B. Is a connecting piece 5 to which one end of the coil spring 56 is connected.
9 are formed. The other end of the coil spring 56 is connected to the engaging pin 54.

Next, the operation of the above-structured locking mechanism 7 will be described with reference to FIG. FIG. 10 (A)
This shows a state where the tray 2 has been pulled out to the disk replacement position. In this state, the movement of the tray 2 in the direction of arrow A is restricted by the engagement of the engagement claws 58 formed on the locking lever 51 with the engagement protrusions 57 formed on the chassis 10. When the tray 2 is pulled out to the disk replacement position, the locking lever 51 is moved in the direction of arrow B, and thus protrudes from the rear end of the movable rail 17 (equivalent to the rear end of the tray 2). It is in a state.

By providing the locking lever 51 as in this embodiment, the tray 2 can be pulled out in the direction of the arrow A by a length that allows the locking lever 51 to move with respect to the movable rail 17. That is, assuming a configuration in which the locking lever 51 is not provided, the engagement claw 58 that engages with the engagement protrusion 57 formed on the chassis 10 needs to be disposed at the rear end of the movable rail 17.

However, in the configuration in which the engaging claws 58 are provided at the rear end of the movable rail 17, the drawable amount of the tray 2 is reduced by the amount indicated by the arrow L in FIG. The work becomes cumbersome (for example, the disk has to be installed and removed diagonally).

On the other hand, by providing the locking lever 51 and increasing the amount of pulling out of the tray 2 in the direction of the arrow A as in the present embodiment, the work of exchanging the disk with respect to the tray 2 can be easily performed. FIG. 10B illustrates a state in which the tray 2 is pressed in the direction of arrow B, and the end of the locking lever 51 in the direction of arrow B is in contact with the rear end 10 d of the chassis 10. In this state, the tray 2 is further moved by the arrow B.
When the pressing operation is performed in the direction, the locking lever 51 moves in the direction of arrow A relative to the movable rail 17 against the spring force of the coil spring 56, and the state shown in FIG. The state shown in FIG. 10C is a state where the tray 2 is located at the disk mounting position, and the tray 2 is locked at the disk mounting position by a lock mechanism 8 described later.

On the other hand, when the lock by the lock mechanism 8 is released by operating the switch button 12 and the tray 2 becomes movable, the locking lever 51 is moved against the movable rail 17 by the spring force of the coil spring 56 described above. It is relatively biased to move in the direction of arrow B. By this operation,
The tray 2 moves in the direction of arrow A, and the tray 2 is
4B, that is, the ejected state in which the tray 2 slightly protrudes from the front surface of the chassis 10. Therefore, the operator of the apparatus 1 can hold the portion protruding from the chassis 10 and pull out the tray 2.

As is apparent from the above description, the locking mechanism 7 has a function of restricting further movement when the tray 2 is moved to the disk exchange position, and also having an ejecting function at the time of unlocking. It has been. Therefore, there is no need to provide an ejection mechanism separately from the locking mechanism 7, and the number of components and the size of the apparatus 1 can be reduced.

Next, the lock mechanism 8 will be described.
As shown mainly in FIGS. 4 and 11 to 14, the lock mechanism 8 includes a lock mechanism mounting portion 3 of the frame 3 a of the sub-chassis 3.
b, and roughly includes a solenoid 49, a lock pin 60, a lock lever 61, an emergency lever 62, and the like.

The lock pin 60 is erected on the bottom of the chassis 10. The lock lever 61 is rotatably mounted on a shaft 63 that stands on the back surface of the frame 3a of the sub-chassis 3. The lock lever 61 has an arm portion 65 having a claw portion 64 at the distal end for engaging with the lock pin 60.
And a connecting arm 67 connected to the plunger 66 of the solenoid 49. Further, a tapered portion 68 is formed at the tip end of the claw portion 64, and a standing pin 69 that engages with the emergency lever 62 is formed at the arm portion 65.

The solenoid 49 is connected to the front bezel 1 described above.
When the first switch button 12 is turned on, it is excited to suck the plunger 66. The end of the plunger 66
Since the lock lever 61 is connected to the connecting arm 67 of the lock lever 61, the lock lever 61 is pivotally displaced about the shaft 63 with the operation of the plunger 66. Note that the plunger 66 is urged in the extension direction by a coil spring 70a disposed on the solenoid 49.

Next, the operation of the lock mechanism 8 will be described. As described above with reference to FIG. 10 and the like, when the tray 2 is moved in the direction of arrow A to the disk mounting position, the sub-chassis 3 also moves in the direction of arrow A on the chassis 10, and the lock lever 61 approaches the lock pin 60. I will do it. When the tray 2 reaches the disk mounting position, the tapered portion 68 of the lock lever 61 goes over the lock pin 60, and the claw portion 64 and the lock pin 60 are engaged. This allows
The movement of the sub-chassis 3 is locked by the lock mechanism 8, so that the tray 2 provided on the sub-chassis 3 is also locked. FIG. 12 shows this locked state.

On the other hand, when the switch button 12 is turned on and the plunger 66 is sucked, the lock lever 61 is rotated and displaced in the direction in which the claw portion 64 is separated from the lock pin 60.
Eventually, the engagement between the claw portion 64 and the lock pin 60 is released. As a result, the lock of the sub-chassis 3 by the lock mechanism 8 is released, and the tray 2 is in a movable state (an unlocked state) shown in FIG.

The emergency lever 62 is arranged on the frame 3a of the sub-chassis 3 so as to be movable in the directions of arrows A and B. This emergency lever 62
A contact portion 70 is formed at the end in the direction of arrow A, and this contact portion 70 is a needle insertion hole 71 formed in the front bezel 11.
(Appears in FIG. 15). An operation claw 72 having a tapered shape is formed at an end of the emergency lever 62 in the direction of arrow B. The operation claw 72 is provided on the upright pin 6 erected on the lock lever 61.
9. Further, the emergency lever 62 is moved by an arrow A by a coil spring 73.
Biased in the direction.

The emergency lever 62 having the above-described structure can be operated by the lock mechanism 8 even when the power of the computer on which the apparatus 1 is disposed is turned off (that is, even when the solenoid 49 cannot be driven). Tray 2
Is provided so that the tray 2 can be pulled out.

Specifically, as described above, the solenoid 49
Is in a state where it cannot be driven, the needle 74 is inserted into the needle insertion hole 71 in the direction of arrow B as shown in FIG.
As a result, the needle 74 comes into contact with the contact portion 70 to press and urge the emergency lever 62 in the direction of arrow B. When the emergency lever 62 moves in the direction of arrow B due to the pressing force of the needle 74, the operation claw 72 engages with and pushes the standing pin 69 provided on the lock lever 61. As described above, since the operation claw 72 has a tapered shape, the lock lever 61 rotates in accordance with the operation of the operation claw 72 in the direction of arrow B, and the engagement between the claw portion 64 and the lock pin 60 is eventually released. Is done. As a result, the tray 2 can be pulled out even if the solenoid 49 cannot be driven.

The following is a description focusing on the arrangement of the solenoid 49. As shown in the drawings, in the present embodiment, the driving direction of the plunger 66 (drive shaft) (direction indicated by arrows C and D) in the solenoid 49 is the moving direction of the tray 2 (that is, arrows A and B). (Direction indicated by). Specifically, in the case of the present embodiment, the driving direction of the plunger 66 and the moving direction of the
It is configured to have an angle of 5 degrees.

As described above, the lock mechanism 8 is configured so that the lock is released when the plunger 66 of the solenoid 49 moves in the direction of arrow D. On the other hand, the device 1 provided with the lock mechanism 8 is provided in a notebook personal computer or the like, and may be shocked when being carried. If the direction of the impact coincides with the direction of movement of the plunger 66, the impact causes the plunger 6 to move.
There is a risk that the tray 6 will move, the lock of the tray 2 by the lock mechanism 8 will be released, and the tray 2 will jump out of the chassis 10.

Then, the direction of the shock applied to the device 1 provided in the notebook type personal computer was determined. The shock applied to the device 1 was mainly in the directions of arrows A and B or arrows E and F. Turned out to be the direction. Therefore, by configuring the driving direction of the plunger 66 to have an angle with respect to the moving direction of the tray 2 (that is, the direction indicated by arrows A and B) as in the present embodiment, the driving direction of the plunger 66 is impacted. The direction can be different from the direction in which is easily applied. Accordingly, the locked state of the tray 2 can be reliably maintained even when an impact is applied.

Further, by setting the driving direction of the plunger 66 at an angle with respect to the moving direction of the tray 2 as described above, the solenoid 49 can be disposed substantially in parallel with the pickup driving motor 25 described above. Becomes Thereby, the solenoid 49 and the pickup driving motor 2
5 can be arranged adjacently, and the size of the device 1 can be reduced as compared with a device having a conventional configuration in which the pickup portion 5 is interposed and separated on a diagonal line of the sub-chassis 3. .

Next, the cover 9 will be described mainly with reference to FIGS. The cover 9 is disposed on the upper portion of the chassis 10 and has a function of protecting various mechanisms and devices mounted on the chassis 10 described above. The cover 9 is formed by press-forming a steel plate. The thickness of the cover 9 is set thin in order to reduce the thickness of the device 1. For this reason,
The cover 9 has projections 75 and 76 projecting inward (that is, toward the disc at the disc mounting position) and projections projecting upward so that a predetermined strength can be maintained even when the cover 9 is thin. 77 are formed. This projection 7
5, 76 and 77 are formed by collective press molding when the cover 9 is formed, and can be easily formed. The amount of protrusion of the protrusions 75 to 77 is, for example,
0.6 mm, the protrusion 76 is set to 0.4 mm, and the protrusion 77 is set to 0.15 mm.

As shown in FIG. 16 (A), in this embodiment, the projections 75 to 77, particularly, the projection 75 are provided so as to face the outer peripheral position of the disk 78 at the disk mounting position. It is a feature. With the above configuration, an impact is applied to the device 1 in the vertical direction (the direction indicated by arrows G and H in the figure), and the disk 78 is moved in FIG.
Even if the disk 78 is flexibly deformed as shown in FIG.
Comes into sliding contact with only the protrusion 75 formed on the cover 9. The sliding contact area between the disk 78 and the protruding portion 75 is configured so that the width in the disk radial direction is about 1 mm.

Generally, a lower surface of a disk 78 mounted on a CD-ROM device is a recording surface, and various printings are performed on an upper surface. Therefore, when the vertical shock is applied to the apparatus 1 as described above,
If the sliding contact area between the disk 78 and the cover 9 is wide, the print applied to the disk 78 is scraped off, and the disk 78 cannot be identified.

On the other hand, in this embodiment, when the impact is applied, the sliding contact position between the disk 78 and the cover 9 is determined by the protrusion 75
Are formed, and the sliding contact range is narrow, and the sliding contact position is an outer peripheral position where printing is not generally performed. For this reason, it is possible to prevent the print applied to the disk 78 from being scraped off.
Can be reliably performed.

Further, the disk 78 has a reflecting surface for reflecting a laser beam, and a plastic layer for protecting the reflecting surface is formed on both surfaces of the reflecting surface. Since this plastic layer has a thickness of only 30 μm on the upper surface side of the disk, when the disk 78 and the cover 9 slide over a wide range when the vertical impact is applied as described above, the upper surface of the disk It is conceivable that the plastic layer on the side is scraped off, the reflective surface is damaged, and the data recorded on the disk 78 is destroyed.

On the other hand, in the present embodiment, the range of sliding contact between the disk 78 and the cover 9 when an impact is applied is a portion having a width of about 1 mm at the outermost circumference of the disk, and in a CD-ROM, a range of 2 mm at the outermost circumference of the disk. Is a part which is set as an unrecorded area. Therefore, it is possible to prevent the data on the disk 78 from being destroyed, and it is possible to reliably reproduce the disk 78.

It should be noted that the present invention relates to a CD-ROM as in the above embodiment.
The present invention is similarly applied to not only the ROM drive device but also other disk-shaped recording media such as a CD, a magnetic disk, a magneto-optical disk, and an optical disk. In addition, the disk device of the present invention has been described as an example in which the disk device is housed in the housing of a notebook personal computer. However, the present invention is not limited to this. It can also be applied to an apparatus having the configuration described below.

[0079]

As described above, according to the present invention, the base is
Thermal expansion due to forming with resin mixed with lath fiber
The effect of tension can be reduced, and the pickup drive
Glass fiber is not mixed in the holder that constitutes the mechanism
By forming it with resin
Flexibility can be provided, and the holder can be
Can be prevented.

Also, since the pickup drive mechanism can be assembled while being detached from the base,
The workability of assembling the pickup drive mechanism can be improved as compared with a configuration in which the pickup drive mechanism is integrated with the base.

[Brief description of the drawings]

FIG. 1 is a plan view of a disk device according to an embodiment of the present invention.

FIG. 2 is a bottom view of the disk device according to one embodiment of the present invention.

FIG. 3 is an exploded perspective view of a disk device according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a bottom surface of the sub-chassis in which a drive unit and the like are provided.

FIG. 5 is a perspective view showing a bottom surface of the drive unit.

FIG. 6 is a perspective view showing a pickup driving mechanism.

FIG. 7 is an exploded perspective view for explaining attachment of the pickup drive mechanism to a base.

FIG. 8 is a view for explaining a mounting holder.

FIG. 9 is a perspective view for explaining a tray sliding mechanism and a locking mechanism.

FIG. 10 is a diagram for explaining the operation of the locking mechanism.

FIG. 11 is an exploded perspective view illustrating a sub-chassis and a lock mechanism.

FIG. 12 is a plan view for explaining a sub-chassis and a lock mechanism.

FIG. 13 is a diagram for explaining the operation of the lock mechanism.

FIG. 14 is a diagram for explaining the operation of the emergency lever.

FIG. 15 is a perspective view illustrating a protrusion formed on a cover.

FIG. 16 is a cross-sectional view illustrating a protrusion formed on a cover.

FIG. 17 is a diagram for explaining a problem of a conventional disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device 2 Tray 3 Subchassis 4 Tray sliding mechanism 5 Pickup part 6 Turntable 7 Locking mechanism 8 Lock mechanism 10 Chassis 11 Front bezel 12 Switch button 15, 16 Guide rail mechanism 17 Movable rail 18 Fixed side rail 19 Slide rail Reference Signs List 20 disk motor 21 drive unit 22 base 23 pickup drive unit 25 pickup drive motor 29 pickup drive mechanism 30 lead screw 31 guide unit 32 engagement unit 33 attachment holder 39, 40 engagement claw 42 motor base unit 44 circuit board 45 flexible board 46 , 47 connector 48 FPC for connection in unit 49 solenoid 51 locking lever 54, 55 engaging pin 56 coil spring 57 engaging projection 58 engaging claw 60 lock pin 61 lock lever 62 emergency lever 66 the plunger 67 the coupling arm 69 upstand pins 70 contact portion 72 operating pawl 74 needle 75-77 protrusion 78 disk

Claims (1)

(57) [Claims] At least playback processing is performed on a disc.
Pick up,For driving pickup using gear supported by holder
Transmitting the driving force of the motor to the pickup, The pick
Pickup drive mechanism for driving the pickup, and the pickup and the pickup drive mechanism are disposed.
A disk device having a baseThe base is formed of a resin mixed with glass fibers, The holder is made of resin in which the glass fiber is not mixed.
More formed, And, The pickup drive mechanism is independent of the base.
And the pickup drive mechanism is
Disk drive characterized in that it can be mounted on
Place.