JPH0945064A - Disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damage of a print on a disk surface in a disk apparatus assembled in a notebook-sized personal computer as a CD-ROM driver. SOLUTION: The disk apparatus comprises a turntable 6 for supporting a disk 78 contained in a predetermined space formed between a chassis 10 and a cover 9 to rotate at a predetermined rotating speed and a disk motor 20. In the apparatus, a protrusion 75 so constituted as to be oppositely disposed at the outer peripheral position of the disk 78 and brought into contact with the outer peripheral position of the disk 78 at the time of applying an impact is formed integrally with the cover 9.

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 For example, a compact disc (diameter 12 cm) reproduced by a laser pickup is used as a storage medium for storing information such as a database and software.
Or 8 cm) is being used. Therefore, a built-in disk device (CD-ROM drive device) built in a chassis 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 mounted is driven by a motor. When the tray moves outside the chassis, the disk is mounted on a turntable in the tray, and the tray is again driven by the driving force of the motor. To the chassis. However, in the method of driving the tray with a motor as described above, a motor for driving the tray and a transmission mechanism for transmitting the driving force to the tray are required, and it is difficult to reduce the size and thickness of the apparatus accordingly. , Could not be incorporated into the chassis of a notebook computer.

[0004] Therefore, a disk drive is being 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 chassis or a disk replacement position outside the chassis by manual operation. An example of this type of disk device is shown in FIG. The figure shows a state in which the disc 100 is mounted on the turntable 101 arranged in the disc device (disc mounting state). The turntable 101 is directly connected to the rotation shaft of the disk motor 102, and the driving force of the disk motor 102 causes the disk 100 placed on the turntable 101 to rotate at a predetermined rotation speed. In addition, a cover 103 is provided on the top of the chassis (not shown).
Is arranged to prevent dust from entering the surface of the disk 100 and the inside of the apparatus.

[0005]

By the way, a disk device incorporated in a notebook personal computer or the like tends to receive more external impacts than a desktop personal computer. As shown in FIG. 17 (A), the disk 100 has a flat shape without bending when no impact is applied. However, when a shock is applied in the vertical direction in the figure (axial direction of the disk motor 102),
As shown in FIG. 17B, the disc 100 is bent, and a wide area of the upper face of the disc 100 comes into sliding contact with the cover 103.

Generally, on the surface (front surface) of the disc 100 facing the cover 103, a display showing the contents recorded on the disc 100 is printed. Therefore, when the disk 1 is driven by the impact as described above while the disk 1 is rotating.
When 00 slidably contacts the cover 103, the print is scraped off at the slidable contact portion, and the disc 100 cannot be identified.

Further, the disk has a structure in which both surfaces of the reflecting surface for reflecting the laser light are protected by a plastic layer. This plastic layer is 30 μm on the top side of the disc
Since it has only the thickness of
If the 00 and the cover 103 are in sliding contact with each other over a wide range, there is a problem that the plastic layer on the upper surface of the disc is scraped off, the reflective surface is damaged, and the data recorded on the disk 100 may be destroyed. .

The present invention has been made in view of the above points, and an object of the present invention is to provide a disk device capable of preventing damage to printing on the disk surface even when an impact is applied.

[0009]

In order to solve the above-mentioned problems, the present invention comprises a disk rotating means for supporting a disk housed in a predetermined space in a chassis and rotating the disk at a predetermined rotation speed. In the disk device, a protrusion member is provided which is disposed so as to face the outer peripheral position of the disk so as to come into contact with the outer peripheral position of the disk when a shock is applied.

In the disk device having the above structure, the protruding member is provided so as to face the outer peripheral position of the disk, so that when the disk is bent or vertically displaced when a shock is applied, the outer peripheral portion of the disk becomes the protruding member. Abut.
In general, the outer peripheral portion of the disc is not printed with an indication or the like indicating what is recorded on the disc. Therefore, by configuring the protruding member to be in sliding contact with the disc only at this outer peripheral position, destruction of recorded data and disc It is possible to prevent the print applied to the surface from being damaged.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show an embodiment of a disk device 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 built-in type device built in a casing of a notebook 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.

This device 1 is generally provided with a tray 2 for inserting a disc (not shown), and the tray 2.
A sub-chassis 3 for supporting the tray 2, a tray sliding mechanism 4 for slidably supporting the tray 2, an optical pickup unit 5 provided on the sub-chassis 3, and a mounted disc (CD-ROM). A turntable 6 which is driven to rotate,
A locking mechanism 7 (shown in FIGS. 9 and 10) that locks the tray 2 when the tray 2 moves to the disc exchange position, a locking mechanism 8 that locks the tray 2 when the tray 2 moves to the disc mounting position, and the like. It is composed by.

In FIG. 1, the tray 2 (shown by the one-dot chain line in FIG. 1) with the cover 9 shown in FIG. 3 removed is at a predetermined mounting position (hereinafter, referred to as a disk mounting position) where the disk performs a reproducing process in the apparatus. FIG. 2 also shows a state in which the tray 2 has been moved, and FIG.

The tray 2 is formed to have a lateral width smaller than the outer diameter of the disc so that a part of the disc (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 the present 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 integrally with the tray 2 in the A and B directions. 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 disc facing surface 2 which forms a space for facing the disc.
a, an opening 2b for a pickup and a turntable formed in the disc facing surface 2a, and a disc 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 dimension smaller than the disk outer diameter so as to cover the housing portion 10a of the chassis 10, and is formed so as to cover an area of about ⅔ of the disk. As a result, the size of the device 1 can be reduced. The sub chassis 3 is shown in FIGS.
As shown in FIGS. 1 and 12, the tray 2 is placed and fixed, and a quadrangular frame 3a having an opening in which the drive unit 21 having the pickup section 5 and the turntable 6 is disposed, and the frame 3a. A lock mechanism arranging portion 3b formed above and having a lock mechanism 8 to be described later, 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.

The guide rail mechanisms 15 and 16 will be described below. 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 side rail 17 and fixed side 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 fixed side rail 18 rotates the pinion 20 while sliding in the A direction 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.

As a result, 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 the further movement of the tray 2 when the tray 2 reaches the disc 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 section 5, the turntable 6 and the like will be described with reference to FIGS. 1 to 5. 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-mentioned tray 2 is the 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 having glass fibers mixed therein, so that the coefficient of thermal expansion is close to that of the pickup section 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 drawing, and is provided on the lower surface of the base 22 and the gear 2 is attached to the drive shaft.
Pickup drive motor 25 and gear 2 in which 6 is provided
A pickup driving mechanism 29 provided with 7, 28, a lead screw 30 driven via the pickup driving mechanism 29, and a guide extending parallel to the lead screw 30 and guiding the movement of the pickup section 5 It is composed of a part 31 and the like, and has an integrated configuration.

In the above structure, since the pickup section 5 has the engaging section 32 that engages with the screw section of the lead screw 26, the pickup driving motor 24 rotates, and the rotation of the pickup driving mechanism 29 causes the pickup driving mechanism 29 to rotate. When the lead screw 26 is rotationally driven, the pickup unit 5 moves in the disc 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.

Now, the pickup drive mechanism 29 will be described in more detail with reference to FIGS. 6 to 8. 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 integrally provided at the shaft end portion of the lead screw 26, and the shaft end portion is inserted into and rotatably supported by a bearing hole 36 formed in the mounting holder 33. 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 lead screw 2 is attached to the base 22.
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 includes 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.

Pickup drive mechanism 2 having the above structure
9, the mounting holder 33 is composed of a member separate from the base 22. As described above, the base 22 is formed of a resin having glass fibers mixed therein so that the base 22 has a thermal expansion coefficient close to that of 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 in which glass fibers are not mixed. are doing.

The resin mixed with the glass fiber can reduce the coefficient of thermal expansion, but its hardness becomes high (that is, it becomes brittle). Therefore, in the structure in which the holder for supporting the support shaft 34 is formed on the base 22, the support shaft is formed. There is a possibility that the holder part may be broken when the 34 is press-fitted.

On the other hand, in this embodiment, since the mounting holder 33 into which the support shaft 34 is press-fitted is 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 the present embodiment, the mounting holder 33 is made of resin containing no glass fiber. Since the resin containing no glass fiber has flexibility as compared with the resin containing glass fiber, the support shaft 34
The mounting holder 33 will not be cracked even if press-fitting is performed.

Therefore, as in this embodiment, the attachment holder 33
The support shaft 34 can be formed by making the base 22 and the base 22 separate from each other.
The press-fitting process can be easily performed, and the yield can be improved. Further, the gears 27, 28, the lead screw 30, etc. can be easily assembled to the attachment holder 33, and the assembling workability can be improved as compared with the configuration in which the pickup drive mechanism is integrated with the base.

Next, the turntable 6 will be described. The turntable 6 is configured to be directly connected to the drive shaft of the disk motor 20 arranged 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 disk motor 20 is fixed to the motor base member 42 as shown in FIGS. 2, 4 and 5. 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 focused and described. As described above, the drive unit 21 is provided with the electric components such as the pickup unit 5, the disc motor 20, the pickup driving motor 25, etc. The electric components 5, 20, 25 are arranged in the chassis 10. Need to be connected to the circuit board 44. This circuit board 4
Reference numeral 4 denotes a signal processing circuit that performs signal processing on the reproduction signal generated by the pickup unit 5, and the motors 10 and 25.
A control circuit for controlling the above is provided.

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

Conventionally, the end portion of the flexible substrate 45 on the drive unit side is connected to a connector provided on a printed circuit board disposed 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 board.

On the other hand, in this embodiment, the connector 47 connected to the flexible substrate 45 is arranged on the motor base member 42 as described above. The motor base member 42 has been conventionally arranged as a member for fixing the disk motor, and this embodiment uses this motor base member 42 as a member for disposing the connector 47.

With this structure, the motor base member 42 can be provided with the same function as that of the conventional printed circuit board, and thus the conventionally required printed circuit board can be eliminated. Thereby, the drive unit 21
The thickness of the device 1 can be reduced, and the thickness of the device 1 can be reduced. Further, since the printed circuit board conventionally required is not necessary, the number of parts 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, the connector 4
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 faces a base portion 48a fixed to the front side surface of the chassis 10 with a screw 50 and a solenoid 49 constituting the lock mechanism 8 described later from the base portion 48a. A first extending portion 48b extending 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 extending portion 48e that connects the base portion 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 electric component 5, 20, 2
FPC4 for connection within the unit to connect 5 and the connector 47
Although 8 is used, a lead wire, a jumper wire, or the like 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 the further movement of the tray 2 when the tray 2 moves to the disc exchange position as described above. The locking mechanism 7 is a locking lever 5 arranged at the end of the movable rail 17 arranged on the tray 2 in the direction of arrow B.
1 and the engagement pins 54 that engage with the two elongated holes 52 and 53 formed upright on the movable rail 17 and formed on the locking lever 51.
55, a coil spring 56 for urging the locking lever 51 in the direction of arrow B, and an engagement protrusion 57 and the like arranged near the end of the chassis 10 in the direction of arrow A.

In the locking lever 51, the long holes 52 and 53 engage with the engaging pins 54 and 55, whereby the movable rail 17 is moved.
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.

Further, an engaging claw 58 which engages with an engaging protrusion 57 formed on the chassis 10 is formed at a lower portion of the end portion of the locking lever 51 in the arrow B direction, and at the end portion in the arrow A direction. Is a connection piece 5 to which one end of the coil spring 56 is connected.
9 is formed. The other end of the coil spring 56 is connected to the engaging pin 54.

Next, the operation of the locking mechanism 7 having the above structure will be described with reference to FIG. FIG. 10 (A)
The state where the tray 2 is pulled out to the disc exchange position is shown. In this state, the engagement claw 58 formed on the locking lever 51 engages with the engagement projection 57 formed on the chassis 10, whereby the movement of the tray 2 in the arrow A direction is restricted. Further, when the tray 2 is pulled out to the disc exchange position, the locking lever 51 moves in the direction of the 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 the present embodiment, it becomes possible to pull out the tray 2 in the direction of the arrow A as long as the locking lever 51 can 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 structure in which the engaging claw 58 is provided at the rear end of the movable rail 17, the amount of the tray 2 that can be pulled out is reduced by the amount of the arrow L in the figure, and the disc is exchanged for the tray 2. Work becomes tedious (for example, you have to insert and remove the disc at an angle).

On the other hand, by providing the locking lever 51 and increasing the amount of pulling out the tray 2 in the direction of the arrow A as in the present embodiment, it is possible to easily perform the work of exchanging the disk for the tray 2. 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 button 8 is unlocked by operating the switch button 12 and the tray 2 becomes movable, the locking lever 51 moves against the movable rail 17 by the spring force of the coil spring 56. It is relatively urged 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 of the tray 2 when the tray 2 moves to the disc exchange position, and also an eject function at the time of unlocking. It is said that. 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 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 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, and thus the tray 2 arranged in 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 attracted, the lock lever 61 is rotationally 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.

Further, the emergency lever 62 is arranged on the frame body 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 configured as described above is provided with the lock mechanism 8 even when the computer in which the apparatus 1 is installed is powered 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 layout of the solenoid 49 will be mainly described below. As shown in each drawing, in the present embodiment, in the solenoid 49, the driving direction of the plunger 66 (driving shaft) (directions indicated by arrows C and D in the drawing) is the moving direction of the tray 2 (that is, arrows A and B). (Direction indicated by the arrow). Specifically, in the case of this embodiment, the driving direction of the plunger 66 and the moving direction of the rae 4 are four.
It is configured to have an angle of 5 degrees.

As described above, the lock mechanism 8 is structured such that the lock is released by moving the plunger 66 of the solenoid 49 in the direction of arrow D. On the other hand, the device 1 in which the lock mechanism 8 is provided is provided in a laptop computer or the like, and may be impacted when being carried. If the direction of this impact matches the movement direction of the plunger 66, this impact causes the plunger 6 to move.
6 may move, the lock of the tray 2 by the lock mechanism 8 may be released, and the tray 2 may jump out of the chassis 10.

Therefore, when the direction of the impact applied to the device 1 arranged in the notebook computer is obtained, the impact applied to the device 1 is mainly in the directions of arrows A and B or arrows E and F. It 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 directions indicated by arrows A and B) as in the present embodiment, the driving direction of the plunger 66 is impacted. Can be different from the direction in which is easily applied. Therefore, the locked state of the tray 2 can be reliably maintained even when a shock is applied.

Further, by making 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 arranged substantially parallel to the above-mentioned pickup driving motor 25. Becomes As a result, the solenoid 49 and the pickup driving motor 2 are
5 can be arranged adjacent to each other, 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 sandwiched and the sub chassis 3 is spaced apart on a diagonal line. .

Next, the cover 9 will be described mainly with reference to FIGS. 15 and 16. The cover 9 is provided on the chassis 10 and has a function of protecting various mechanisms and devices mounted on the chassis 10. The cover 9 is formed by pressing a steel plate, and the plate thickness thereof is set to be thin in order to reduce the thickness of the device 1. For this reason,
The cover 9 has protrusions 75 and 76 protruding inward (that is, toward the disc at the disc mounting position) and protrusions protruding upward so that a predetermined strength can be maintained even if the plate thickness is thin. 77 is formed. This protrusion 7
5, 76 and 77 are collectively press-molded when the cover 9 is formed, and can be easily formed. Further, the protrusion amount 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, among the protrusions 75 to 77, the protrusion 75 is provided so as to face the outer peripheral position of the disc 78 at the disc mounting position. It is a feature. With the above-described structure, a shock is applied to the device 1 in the vertical direction (directions indicated by arrows G and H in the drawing), and the disk 78 is moved to the position shown in FIG.
Even if it is flexibly deformed as shown in FIG.
Will be in sliding contact with only the protruding portion 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.

In general, the disk 78 mounted in the CD-ROM device has a lower surface as a recording surface and various printings on the upper surface. Therefore, when the vertical impact is applied to the device 1 as described above, the disk 78
If the sliding contact range between the cover 78 and the cover 9 is wide, the print applied to the disc 78 is scraped off, and the disc 78 cannot be identified.

On the other hand, in the present embodiment, the sliding contact position between the disk 78 and the cover 9 when a shock is applied is the protruding portion 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 the 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, if the disk 78 and the cover 9 slide over a wide range when a vertical impact is applied as described above, the upper surface of the disk will face up. 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 this embodiment, the sliding contact range between the disk 78 and the cover 9 at the time of applying a shock is a portion of the outermost circumference of the disc having a width of about 1 mm, and in the CD-ROM, an area having a width of the outermost circumference of the disc of 2 mm. Is a portion which is an unrecorded area. Therefore, the data on the disc 78 can be prevented from being destroyed, and the disc 78 can be reliably reproduced.

In the present invention, the CD-type as in the above embodiment is used.
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. Further, 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 computer, but the invention is not limited to this, and other electronic devices can be used as external devices separate from the electronic devices. It can also be applied to a device having the above configuration.

[0075]

As described above, according to the present invention, it is possible to prevent the destruction of recorded data and the occurrence of printing damage on the disk surface even when a shock is applied.

[Brief description of 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 the conventional disk device.

[Explanation of symbols]

 1 Device 2 Tray 3 Subchassis 4 Tray Sliding Mechanism 5 Pickup Part 6 Turntable 7 Locking Mechanism 8 Locking Mechanism 10 Chassis 11 Front Bezel 12 Switch Buttons 15, 16 Guide Rail Mechanism 17 Movable Side Rail 18 Fixed Side Rail 19 Slide Rail 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 Part 32 Engagement Part 33 Mounting Holder 39, 40 Engaging Claw 42 Motor Base Part 44 Circuit Board 45 Flexible Board 46 , 47 connector 48 FPC for connection within unit 49 solenoid 51 locking lever 54, 55 engaging pin 56 coil spring 57 engaging protrusion 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)

[Claims] 1. A disk device comprising a disk rotating means for supporting a disk housed in a predetermined space in a chassis and rotating the disk at a predetermined rotation speed, wherein the disk device is disposed so as to face the outer peripheral position of the disk, and a shock is applied. A disc device, characterized in that a protrusion member configured to come into contact with an outer peripheral position of the disc is provided at times.