JP2003317358A - Disk tray and disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk tray and a disk device in which a proper clamp state of clamping an optical disk with a turn table and a disk clamper is smoothly and surely obtained even when any one of a large diameter disk and a small diameter disk is used. <P>SOLUTION: The disk device has a device main body 2 and a disk tray 11 to be moved back and forth. The disk tray 11 has a 12 cm disk housing part 111 for housing a disk of 12 cm and an 8 cm disk housing part 113 for housing a disk 200 of 8 cm, and a center 118 of the 8 cm disk housing part 113 is made eccentric forwards with respect to a center 117 of the 12 cm, disk housing part 113. In other words, the center 118 of the 8 cm disk housing part is made eccentric to be closer to a position where a track T of a central portion 526 of an upper terminal of the turn able 52 crosses the disk 200 of 8 cm housed in the 8 cm disk housing part 113. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device for reproducing or recording / reproducing an optical disc and a disc tray installed and used in the disc device.

[0002]

2. Description of the Related Art CD-ROM, CD-R, CD-RW,
2. Description of the Related Art A disc device for reproducing or recording / reproducing an optical disc such as a DVD is known. This disc device has a box-shaped device body and a disc tray that is movable with respect to the device body. An optical disc is stored in the disc tray and loaded into the device body by moving the disc tray. Inside the apparatus main body, a chassis on which an optical disk rotation drive mechanism having a turntable is mounted is rotatably installed. A disc clamper is rotatably installed on the top plate of the apparatus body.

In such a disc device, when an optical disc is loaded into the main body of the device, the turntable is raised by the rotation of the chassis, so that the optical disc is mounted on the turntable and the disc clamper serves as a turntable. The optical disc is clamped between them (clamping state). In the clamped state, the protrusion protruding from the center of the turntable is inserted into the center hole of the optical disc, and the protrusion of the turntable is inserted into the recess formed in the center of the disc clamper to be fitted. There is.

By the way, such a disk device is usually
Both 12 cm disc (large diameter disc) and 8 cm disc (small diameter disc) can be reproduced or recorded / reproduced. So, on the disc tray,
A shallow concave 12 cm disc storage portion for storing a 2 cm disc is formed, and an 8 cm disc storage portion for storing an 8 cm disc is formed so as to be recessed in a shallower concave shape from the bottom surface of the 12 cm disc storage portion. In the conventional disc tray, the 12 cm disc storage portion and the 8 cm disc storage portion are formed with their centers aligned (concentrically).

However, in the conventional disk device,
When an 8 cm disc was loaded in the device, the turntable and the disc clamper could not be fitted smoothly, or the fitting could fail and a proper clamped state could not be obtained.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to smoothly and reliably ensure an appropriate clamped state for holding an optical disk between a turntable and a disk clamper, regardless of whether a large diameter disk or a small diameter disk is used. It is to provide a disc tray and a disc device that can be obtained.

[0007]

The above objects are achieved by the present invention described in (1) to (11) below.

(1) With respect to the main body of the disc device having a function of reproducing information recorded on the optical disc, the disc is moved to a loading position for loading the optical disc and a discharging position for ejecting the optical disc, which is located in front of the loading position. A disk tray that can be installed and used as possible, including a shallow concave large-diameter disk storage portion for storing a large-diameter disk, and a shallow concave small-diameter disk storage portion for storing a small-diameter disk smaller than the large-diameter disk. And a center of the small diameter disc storage portion is eccentric from a center of the large diameter disc storage portion.

(2) The disc tray according to (1), wherein the center of the small-diameter disc storage portion is eccentric to the center of the large-diameter disc storage portion.

(3) The disc tray according to (1) or (2), wherein the small-diameter disc storage portion has a circular shape or a shape in which a part of the circular shape is missing.

(4) The distance between the center of the small diameter disc storage portion and the center of the large diameter disc storage portion is 0.3.
The disc tray according to any one of (1) to (3) above, which has a thickness of 0.6 mm.

(5) A disc device having a function of reproducing information recorded on an optical disc, the device body, a loading position for loading the optical disc on the device body,
A disc tray movably installed at an ejection position for ejecting an optical disc, which is on the front side of the loading position, a chassis rotatably installed in the apparatus body, and mounted on the chassis to mount an optical disc. An optical disk rotation driving mechanism that has a turntable and moves to an ascending position and a descending position in the apparatus body by the rotation of the chassis, and when the optical disk rotation driving mechanism is at the descending position, the turntable Is located below the disc tray, and when the optical disc rotation drive mechanism is in the raised position, the loaded optical disc is mounted on the turntable,
The disc tray has a shallow concave large-diameter disc storage portion for storing a large-diameter disc, and a shallow concave small-diameter disc storage portion for storing a small-diameter disc having a smaller diameter than the large-diameter disc. A disc device, wherein the center of the disc is eccentric from the center of the large-diameter disc storage portion.

(6) The disk device according to (5), wherein the center of the small-diameter disk storage portion is eccentric to the center of the large-diameter disk storage portion.

(7) The disk according to (5) or (6) above, wherein the orbit of the turntable when the optical disk rotation drive mechanism moves up and down is inclined with respect to the optical disk stored in the disk tray. apparatus.

(8) The center of the small-diameter disc storage portion is formed by the orbit of the center portion of the upper end of the turntable when the optical disc rotation drive mechanism moves up and down, and the small-diameter disc storage portion in the small-diameter disc storage portion. The disk device according to any one of (5) to (7) above, which is eccentric so as to approach the intersecting position.

(9) The disk device according to any one of (5) to (8) above, wherein the small-diameter disk storage portion has a circular shape or a shape in which a part of the circular shape is lost.

(10) The disk device according to any one of the above (5) to (9), wherein the chassis rotates with respect to the main body of the device with a rotation center near the rear end thereof.

(11) The distance between the center of the small diameter disc storage portion and the center of the large diameter disc storage portion is 0.3.
The disk drive according to any of (5) to (10) above, wherein the disk drive has a size of ˜0.6 mm.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION A disk tray and a disk device according to the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is a plan view showing an embodiment of the disk device of the present invention (disk tray ejected state), FIG. 2 is a plan view showing the internal structure of the disk device shown in FIG. 1, and FIGS. 6 is a sectional side view showing the disc device shown in FIG. 1, respectively, and FIG. 5 is a sectional side view showing a front side portion of the disc device shown in FIG. 1 (state before clamping operation), FIG.
7 is an enlarged cross-sectional side view showing the vicinity of the turntable and the disc clamper in FIG. 5, and FIG. 7 is a cross-sectional side view showing the front side portion of the disc device shown in FIG. 1 (state during clamping operation), FIG. 8 is an enlarged sectional side view showing the vicinity of the turntable and the disk clamper in FIG. 7,
FIG. 9 is a sectional side view (in a clamped state) showing a front side portion of the disk device shown in FIG. Note that, for convenience of explanation, the left side in FIGS. 3 to 9 is “front”, the right side in FIGS. 3 to 9 is “rear”, and FIG. The upper part is described as “upper” and the lower part in FIGS. 3 to 9 is described as “lower”.

The disk device 1 shown in these figures is a music CD, CD-ROM, CD-R, CD-RW, or DVD.
A device having a function of reproducing information recorded on an optical disc (or a function of recording / reproducing), such as a personal computer, is installed in the main body of a computer device (not shown) such as a personal computer. In addition, the disk device 1
Can be played (or recorded / played back) on both a 12 cm disc (large diameter disc) and an 8 cm disc (small diameter disc) 200.

The disc device 1 comprises a device body 2, a disc tray 11 on which an optical disc is placed and which moves in the front-rear direction with respect to the device body 2, and a sled mechanical unit 3 installed in the device body 2. There is. The configuration of each unit will be described below.

As shown in FIGS. 1 to 3, the apparatus main body 2
Has a frame 21, a casing 22 that covers the lower portion and side portions of the frame 21, and a top plate (lid) 23 that covers the upper portion of the frame 21.

The frame 21 has a disc tray 11,
The disc tray moving mechanism 16, the sled mechanical unit 3, the main circuit board 12, and the like are installed (mounted).

A casing 22 is fixed to the frame 21 by screws, for example, and a lower portion of the frame 21 is covered with a bottom plate 221 of the casing 22.
A top plate 23 is fixed to the upper portion of the frame 21 by, for example, screws, and a space for housing the disc tray 11 is formed between the frame 21 and the top plate 23.

The frame 21 is made of a resin material. The casing 22 and the top plate 23 are plate-shaped members formed by deforming a metal plate in a predetermined manner by press molding or the like.

A disc clamper 8 is rotatably installed on the top plate 23 at a position facing a later-described turntable 52.

The main circuit board 12 has a disk device 1
A circuit for controlling various operations of the computer, an interface connector for connecting to the main body of the computer device, various ICs such as a microprocessor, a memory, a motor driver, and various electronic devices such as resistors, capacitors, and switches. Parts are installed. As shown in FIGS. 3 and 4, the main circuit board 12 is installed below the thread mechanical unit 3 (chassis 4) described later.

As shown in FIGS. 1 and 4, the disc tray 11 has a rectangular plate shape as a whole and is made of a resin material. The disc tray 11 stores 12 cm discs with a diameter of 12 cm.
An m disc storage portion 111 and an 8 cm disc storage portion 113 for storing an 8 cm disc 200 having a diameter of 8 cm are formed.

As shown in FIG. 5, the 12 cm disc storage portion 111 is formed in a shallow concave shape (as a shallow concave portion). Also, the 8 cm disc storage unit 113 is 12 cm.
It is formed in a shallow concave shape further recessed from the bottom surface 114 of the disk storage portion 111.

As shown in FIG. 1, the 12-cm disc storage portion 111 has a circular shape (correctly, a part of the circular shape is missing) slightly larger than the diameter of the 12-cm disc. That is, the stepped portion 115 forming the peripheral edge of the 12 cm disc storage portion 111 has a circular arc which is a part of a circle slightly larger than the diameter of the 12 cm disc. Similarly, the 8 cm disc storage portion 113 has a circular shape (correctly, a part of the circular shape is missing) slightly larger than the diameter of the 8 cm disc. That is, the step portion 116 forming the peripheral edge of the 8 cm disc storage portion 113 has a circular arc which is a part of a circle slightly larger than the diameter of the 8 cm disc. The circular shape referred to here means a substantially perfect circle.

In the present invention, the 8 cm disc storage portion 113
Center 118 (center 118 of arc drawn by step 116)
Is eccentric from the center 117 of the 12 cm disc storage portion 111 (the center 117 of the arc drawn by the step portion 115).
The effect of such a configuration will be described in detail later.

Further, as shown in FIGS. 1 and 4, the disc tray 11 has an opening into which a turntable 52 and an optical pickup 6 which will be described later can be inserted, in a portion from the vicinity of the centers 117 and 118 to the rear side thereof. (Hole portion) 112 is formed.

The disc tray 11 is moved (slipped) in the front-rear direction with respect to the apparatus main body 2 by driving the disc tray moving mechanism 16 mounted on the frame 21. That is, the disc tray 11 is movable with respect to the apparatus main body 2 between a loading position for loading an optical disc (position shown in FIG. 4) and a discharging position for ejecting an optical disc (position shown in FIG. 3). When the disc tray 11 is in the loading position (hereinafter, referred to as “loading state”), the entire disc tray 11 is housed in the apparatus body 2. When the disc tray 11 is in the ejection position (hereinafter, referred to as “ejection state”), most of the disc tray 11 projects forward from the apparatus main body 2.

As shown in FIG. 2, a frame member 13 for supporting the sled mechanical unit 3 is installed inside the apparatus main body 2. The frame member 13 has a substantially rectangular frame shape, and a shaft 131 is formed on both sides of the frame member 13 so as to project therefrom. The shaft 131 is rotatably supported by a receiving portion formed on the frame 21. This allows
The frame member 13 is rotatable with respect to the apparatus main body 2 about a shaft 131.

The driving of the drive mechanism 17 causes the frame member 13 to assume a posture substantially parallel to the top plate 23 and the bottom plate 221 in the loaded state (see FIG. 4), and in the discharged state, the front side thereof is displaced downward to move the top plate. 23 and the bottom plate 221 are displaced so as to be inclined (see FIG. 3).

Inside the frame member 13, the sled mechanical unit 3 is located. The sled mechanical unit 3 mainly includes a chassis 4, an optical disk rotation driving mechanism 5, an optical pickup (optical head) 6, and an optical pickup moving mechanism 7.

The chassis 4 has a substantially plate-like shape with ribs (walls) formed on its edges. The chassis 4 has an optical disk rotation drive mechanism 5, an optical pickup 6, and an optical pickup moving mechanism 7. And are installed (installed) respectively.

The chassis 4 is fixed to the frame member 13 via three rubber bushes (elastic members) 14. That is, the chassis 4 has the rubber bush 1 with respect to the device body 2.
It is supported via 4. The rubber bush 14 can absorb vibration and shock.

The optical disk rotation drive mechanism 5 includes a spindle motor 51 and a rotor 511 of the spindle motor 51.
The turntable 52 is fixed to the chassis 4 and is installed on the front side of the chassis 4. The optical disk rotation drive mechanism 5 is for mounting (mounting) an optical disk on the turntable 52 and rotating the optical disk.

The optical pickup 6 includes an objective lens 61 and
An actuator 62 for driving the objective lens 61 in the optical axis direction (focusing) and the radial direction of the optical disk (tracking), a laser light source, a condensing optical system, a beam splitter (or a half mirror), information detection and focusing. A light receiving element for detecting a signal and a tracking signal, and a supporting member 63 for supporting these are provided, and the reflected light of the laser light emitted to the recording surface of the optical disc is passed through an objective lens, a beam splitter (or a half mirror), or the like. And leads to the light receiving element.

In the loaded state, the objective lens 61 is exposed in the 12 cm disc storage section 111 and the 8 cm disc storage section 113 through the opening 112 formed in the disc tray 11, and faces the recording surface of the optical disc.

The support member 63 is made of a metal material such as manufactured by die casting. Support member 6
On the left side of FIG. 2 of FIG. 3, there is formed a pair of sliding portions 64 each having a hole through which the guide shaft 76 is inserted. A sliding portion 65 that engages with the guide shaft 77 and slides along the guide shaft 77 is formed on the right side of the support member 63 in FIG. 2.

The optical pickup moving mechanism 7 includes a sled motor 71 capable of forward / reverse rotation, a worm 72 fixed to a rotation shaft of the sled motor 71, a large diameter gear 73 meshing with the worm 72, and a large diameter. A small diameter gear 74 that is fixed to the gear 73 and rotates coaxially, a rack gear 75 that is fixed to the support member 63 and meshes with the small diameter gear 74, and a pair of guide shafts that define the movement path of the support member 63 and guide it. It is composed of 76 and 77.

When the sled motor 71 is driven, its rotational force is sequentially transmitted to the worm 72, the large diameter gear 73, the small diameter gear 74 and the rack gear 75, and the support member 63 is guided along the guide shafts 76 and 77 in the radial direction of the optical disk ( It moves in a predetermined movement range in the radial direction. In this case, depending on the rotation direction of the sled motor 71, the support member 63 is
It moves in a direction approaching the rotation center of the optical disk or in a direction moving away from the rotation center.

Chassis 4 (thread mechanical unit 3)
Rotates with respect to the apparatus main body 2 together with the frame member 13. Figure 3
As shown in, the shaft 131, which is the center of rotation, is located near the rear end of the chassis 4. That is, the rear end of the chassis 4 is a rotation end 41 that is a center of rotation and is substantially not displaced with respect to the device body 2, and the front end of the chassis 4 is a displacement end 42 that is substantially vertically displaced with respect to the device body 2. ing.

With such a configuration, the chassis 4 (sled mechanical unit 3) in the loaded state rises on the side of the displacement end 42 and assumes a posture substantially parallel to the top plate 23 and the bottom plate 221 (see FIG. 4). In the discharged state, the displacement end 42 side descends, and becomes a posture inclined with respect to the top plate 23 and the bottom plate 221 (see FIG. 3). Along with this, the optical disc rotation drive mechanism 5 moves to the raised position (the position shown in FIG. 4) and the lowered position (the position shown in FIG. 3) within the apparatus body 2.

As shown in FIG. 3, the orbit (trajectory) T of the upper end central portion 526 of the turntable 52 when the optical disk rotation driving mechanism 5 moves up and down draws an arc about the axis 131. In the figure, the track T is illustrated longer than the movable range of the turntable 52 for the sake of clarity.

When the optical disk rotation drive mechanism 5 is in the lowered position, the turntable 52 is placed in the disk tray 1
The disk tray 11 is located below the disk 1 and does not interfere with the disk tray 11 that moves to the ejection position (see FIG. 3).

When the optical disk rotation drive mechanism 5 is in the raised position, the turntable 52 is moved from the opening 112 to
The device body 2 is projected (exposed) into the 2 cm disc storage portion 111 and the 8 cm disc storage portion 113.
The optical disk loaded inside is mounted (placed) on the turntable 52. In this state, the disc clamper 8 is attracted to the magnet 521 installed on the turntable 52, and thus the optical disc is sandwiched between the turntable 52 and the disc clamper 8 (FIGS. 4 and 6).
reference).

The structures of the turntable 52, the disc clamper 8 and the like will be described in detail below.

As shown in FIGS. 5 and 6, the turntable 52 is fixed to the rotor 511 of the spindle motor 51 with the rotary shaft 512 of the spindle motor 51 fitted in a hole 522 formed in the center thereof. It is fixed). The rotary shaft 512 is inserted halfway through the hole 522, and the remaining portion of the hole 522 allows the turntable 52 to rotate.
A recess 525 is formed in the center of the.

The turntable 52 has a disk-shaped flange portion 523 that projects to the outer peripheral side over the entire circumference, and the optical disk is placed on this flange portion 523.

The turntable 52 also has a protrusion 524 that protrudes from the center of the flange 523. The protrusion 524 is located on the lower side and has a diameter (outer diameter) of a center hole formed in the center of the optical disc (inner diameter).
And a middle taper portion 528 formed above the fitting portion 527, and a top taper portion 529 formed above the middle taper portion 528.

When the optical disk is placed on the flange portion 523, the fitting portion 527 of the projecting portion 524 is inserted into the center hole of the optical disk with almost no clearance, so that the optical disk is turned with the turntable 52 centered. It is mounted on the table 52 (see FIG. 9). Further, in the intermediate taper portion 528, the diameter gradually decreases in the upward direction,
The diameter of the top taper portion 529 gradually decreases in the upward direction at a larger reduction rate than that of the middle taper portion 528.

A ring-shaped (annular) magnet (permanent magnet) 521 is installed in the protruding portion 524 so as to be embedded therein. The magnet 521 may be installed on the disc clamper 8 side.

A portion of the top plate 23 facing the turntable 52 is formed so as to be raised toward the inner surface side, and the portion raised to the inner surface side is an installation portion 231 on which the disk clamper 8 is installed. . This installation part 23
1, a circular opening (hole) 232 is formed.

Due to the formation of the installation portion 231, the outer surface side of the installation portion 231 of the top plate 23 is a recess. The concave portion on the outer surface side of the installation portion 231 is closed by the disc 24.

As shown in FIG. 6, the disk clamper 8
Is a substantially disk-shaped (disk-shaped) first member 81 exposed on the inner surface side of the top plate 23 and in contact with the optical disk, and a substantially disk-shaped member concentrically fixed to the upper side of the first member 81. It is composed of a (disc-shaped) second member 82 and a disc-shaped metal member 83 sandwiched between the first member 81 and the second member 82. The first member 81 and the second member 82 are preferably molded from a resin material.

In this disc clamper 8, a short columnar (cylindrical) body portion 84 is formed by the upper portion of the first member 81 and the lower portion of the second member 82. The diameter (outer diameter) of the body portion 84 is smaller than the diameter (inner diameter) of the opening 232, and the disc clamper 8 is formed by loosely fitting the body portion 84 into the opening 232 (inserting with a gap). It is installed with play. As a result, the disc clamper 8 is movable in all radial directions with respect to the top plate 23.

A taper portion 822 is formed in a portion of the second member 82, which constitutes the body portion 84, the diameter of which gradually decreases toward the disc tray 11, that is, in the downward direction.

At the upper end of the second member 82 (trunk portion 84), a flange portion (engaging portion) projecting to the outer peripheral side over the entire circumference.
821 is formed. The outer diameter of the flange portion 821 is larger than the diameter of the opening 232. Therefore,
The flange portion 821 cannot pass through the opening 232. When the turntable 52 is not raised (the state shown in FIGS. 5 and 6), the flange portion 821 of the disc clamper 8 is engaged with the outer surface of the top plate 23 (installation portion 231) around the opening 232. By the top plate 2
Supported by 3. The engagement portion such as the flange portion 821 is not limited to the one that protrudes in a ring shape over the entire circumference, and if it has a shape that cannot pass through the opening 232, for example, is formed intermittently along the circumferential direction. It may be like a claw portion that has been cut.

At the lower end of the first member 81, a disk-shaped contact portion 811 having a diameter larger than that of the body portion 84 is formed. As shown in FIG. 9, when the turntable 52 and the disc clamper 8 sandwich the optical disc, at least a part of the abutting portion 811 abuts the optical disc.
A portion near the outer periphery of the contact portion 811 is bent upward and has a skirt shape.

The disc clamper 8 is movable in the rotation axis direction (vertical direction) of the top plate 23 within the length of the body portion 84.

At the center of the lower surface of the disk clamper 8,
A recess 85 having a substantially truncated cone shape is formed. A positioning boss 86 integrally formed with the second member 82 projects from the center of the bottom of the recess 85. Also, the recess 85
The metal member 83 is exposed at the bottom (bottom surface) of the.

Next, the operation of clamping the optical disc by the turntable 52 and the disc clamper 8 will be described by taking the case of clamping the 8 cm disc 200 as an example. The same applies to the case of a 12 cm disc.

As the turntable 52 rises from the state before the clamping operation (the state shown in FIGS. 5 and 6), as shown in FIGS. 7 and 8, the 8 cm disc 20
The protrusion 524 of the turntable 52 in the center hole 201 of 0.
Will be inserted. At this time, as shown in FIG. 6, the track T of the upper center portion 526 of the ascending turntable 52 is inclined with respect to the 8 cm disc 200 stored in the disc tray 11. In addition, in the state before the clamp operation,
The center (rotation axis) of the turntable 52 is inclined with respect to the 8 cm disc 200 stored in the disc tray 11.

When the projecting portion 524 is inserted into the center hole 201, the top taper portion 529 is formed on the inner peripheral surface of the center hole 201.
While the outer peripheral surface of the intermediate tapered portion 528 slides, the fitting portion 527 is inserted and fitted into the center hole 201. As a result, even if the center of the 8 cm disc 200 and the center of the turntable 52 are slightly displaced before the clamping operation,
8cm disc 20
0 is properly mounted on the turntable 52.

When the turntable 52 further rises from the state shown in FIGS. 7 and 8, the state shown in FIG. 9 (hereinafter referred to as “clamp state”) is reached, and the clamp operation is completed. In this clamped state, the turntable 52
The protruding portion 524 of the
The positioning boss 86 is inserted and fitted into the recess 525. As a result, the disc clamper 8 and the turntable 52 are united with their centers aligned. Further, in the clamped state, the magnet 521 magnetically attracts the metal member 83, so that the disc clamper 8 is attracted (adsorbed) to the turntable 52, and the 8 cm disc 200 is sandwiched between the two.

Further, in the clamped state, the disc clamper 8 is moved slightly upward so as to be lifted by the turntable 52, and the flange portion 821 is attached to the top plate 2.
3 is placed away from the outer surface of the installation portion 231. In this state, in the illustrated configuration, the vicinity of the lower end of the tapered portion 822 is located at the height of the installation portion 231.

Now, in such a disk device 1, 1
The center 117 of the 2 cm disc storage portion 111 is set at a position that coincides with the center of the turntable 52 in the clamped state when the disc tray 11 is at the loading position (see FIG. 9).

Further, as can be seen from the trajectory T in FIG. 6, the orbit when the turntable 52 moves up and down is not perpendicular to the optical disc housed in the disc tray 11, but is inclined. Therefore, as the center portion 526 of the upper end of the turntable 52 goes downward from the clamped state,
It passes through a position displaced from the center 117 to the front.

In the present invention, as shown in FIG. 6, the center 118 of the 8 cm disc storage portion 113 is eccentric to the front with respect to the center 117 of the 12 cm disc storage portion 111.
In other words, the center 118 of the 8 cm disc storage portion 113
Is the trajectory T of the upper center portion 526 of the turntable 52.
Is eccentric so as to approach the position where the 8 cm disc 200 stored in the 8 cm disc storage portion 113 intersects. According to the present invention, with such a configuration, the proper clamped state can be smoothly maintained during the clamping operation regardless of whether the 12 cm disc or the 8 cm disc 200 is used.
It is definitely obtained. The reason for this will be described below.

When a 12 cm disc is clamped, the position (height) of the 12 cm disc is due to the structure of the disc tray 11 when the 12 cm disc is stored (placed) in the disc tray 11 before the clamping operation. It is relatively on the upper side, that is, at a position (height) close to the position (height) in the clamped state. Therefore, when the protruding portion 524 of the turntable 52 starts to be inserted into the center hole of the 12 cm disc (the state corresponding to FIGS. 7 and 8), the amount of deviation from the center 117 of the upper end center portion 526 is relatively small. . Therefore, even if the center of the 12 cm disc is near the center 117, the amount of this deviation is corrected by the action of the top taper portion 529 and the intermediate taper portion 528.
The 12 cm disc is properly mounted on the turntable 52.

When the 8 cm disc 200 is clamped, the 8 cm disc 200 is clamped before the clamping operation.
Is stored (placed) on the disc tray 11,
8 cm disc 200 due to the structure of the disc tray 11.
Are located below the 12 cm disc. For this reason,
A state in which the protrusion 524 starts to be inserted into the central hole 201 (see FIG. 7).
In the state of FIG. 8), the upper end center portion 526 of the turntable 52 is relatively forwardly displaced from the center 117. In the present invention, since the center 118 of the 8 cm disc storage portion 113 is eccentric to the front of the center 117, the upper end center portion 526 of the turntable 52 at this time is eccentric.
The center of the 8 cm disc 200 is displaced forward in accordance with the displacement of the turntable 52.
There is little misalignment between the center portion 526 of the upper end of the disk and the center of the 8 cm disk 200. Therefore, the protrusion 524 is smoothly and surely inserted into the center hole 201, and the 8 cm disc 200 is properly mounted on the turntable 52.

As described above, according to the present invention, whether the 12 cm disc or the 8 cm disc 200 is used, the optical disc is smoothly and surely mounted on the turntable 52. Therefore, the proper clamping state is achieved during the clamping operation. Can be obtained smoothly and reliably.

On the other hand, unlike the present invention, like the conventional disc tray, the center of the 8 cm disc storage portion,
In the case where the 12 cm disc storage portion is formed so as to coincide (concentrically) with the center, as will be described below, when the 8 cm disc 200 is clamped, the turntable 52 and the disc clamper 8 are fitted together. The fitting may not be performed smoothly, or the fitting may fail and the proper clamped state may not be obtained.

That is, in the disk device having the conventional disk tray, 8 cm in the state corresponding to FIG.
The center of the disc 200 is 12 cm.
Located near the center 117 of the turntable 52, the positional deviation from the upper end center portion 526 of the turntable 52 becomes large. Therefore, 8
Center hole 2 depending on how the cm disc 200 is placed
01 when the protrusion 524 is about to be inserted into the center hole 2
The inner peripheral portion of 01 is hooked on the top taper portion 529 and the inner portion thereof, and the protrusion 524 is formed in the central hole 20.
I couldn't insert it into 1. If the protrusion 524 cannot be inserted into the center hole 201, the turntable 52 and the disk clamper 8 cannot be fitted together, resulting in failure of clamping.

In the present invention, the 8 cm disc storage portion 113
Eccentricity D of the center 118 of the center 118 from the center 117 of the 12 cm disc storage portion 111, that is, the center 118 and the center 1.
The distance D from 17 is not particularly limited, and varies depending on the inclination of the trajectory T and the like, but is usually preferably about 0.3 to 0.6 mm.

According to the present invention, the center 117 of the 12 cm disc storage portion 111 when the disc tray 11 is at the loading position does not have to be at the position corresponding to the center of the turntable 52 in the clamped state. For example,
The center 117 may be located slightly forward of the center of the turntable 52 in the clamped state. In this case, in the clamping operation, when the protrusion 524 of the turntable 52 is inserted into the center hole of the 12 cm disc, the positional deviation between the two becomes smaller, and the 12 cm disc can be clamped more smoothly and reliably.

Further, the direction of eccentricity of the center 118 of the 8 cm disc storage portion 113 with respect to the center 117 of the 12 cm disc storage portion 111 is not limited to the one eccentric to the front, and the orbit of the turntable 52 is different from that shown in the drawing. In accordance with this, the eccentricity may be made in different directions (rearward and lateral).

In the conventional disc tray, 8 cm
Although the disc storage portion has an elliptical shape, compared to such a conventional disc tray, in the disc tray 11, the 8 cm disc storage portion 113 has a circular shape, so that the 8 cm disc 200 can be stored without play. As a result, a smoother and more reliable clamping operation can be performed. Further, for the same reason, the die of the disc tray 11 can be easily manufactured, and the dimension of the 8 cm disc storage portion 113 can be easily measured in the quality control of the mass-produced disc tray 11. It also contributes to cost reduction.

The disk device of the present invention has been described above with reference to the illustrated embodiment, but the present invention is not limited to this, and each unit constituting the disk device can perform any desired function. It can be replaced with that of the configuration. In addition, any constituent may be added.

The present invention can also be applied to a disc device used in a vertical position (a state in which an optical disc is loaded in a posture perpendicular to a horizontal plane).

The large-diameter disc and the small-diameter disc are
The sizes are not limited to the 12 cm disc and the 8 cm disc, but may be other sizes as long as they have a size relationship.

[0086]

As described above, according to the present invention, no matter whether a large-diameter disc or a small-diameter disc is used, the optical disc can be smoothly and surely mounted on the turntable during the clamping operation, and the proper condition can be obtained. It is possible to reliably obtain a proper clamped state.

[Brief description of drawings]

FIG. 1 is a plan view (disc tray ejected state) showing an embodiment of a disc device of the present invention.

FIG. 2 is a plan view showing the internal structure of the disk device shown in FIG.

FIG. 3 is a cross-sectional side view (disc tray ejected state) showing the disc device shown in FIG. 1;

FIG. 4 is a cross-sectional side view showing the disc device shown in FIG. 1 (disc tray loaded state).

5 is a sectional side view (a state before a clamping operation) showing a front side portion of the disc device shown in FIG. 1. FIG.

FIG. 6 is a cross-sectional side view showing the vicinity of a turntable and a disk clamper in FIG. 5 in an enlarged manner.

7 is a cross-sectional side view (a state during a clamping operation) showing a front side portion of the disc device shown in FIG.

8 is an enlarged sectional side view showing the vicinity of a turntable and a disk clamper in FIG.

9 is a sectional side view (in a clamped state) showing a front side portion of the disc device shown in FIG. 1. FIG.

[Explanation of symbols]

1 disk device 11 Disc tray 111 12cm disc storage 112 openings 113 8cm disc storage 114 bottom 115 Step 116 step 117, 118 center 12 Main circuit board 13 Frame member 131 axis 14 rubber bush 16 Disc tray moving mechanism 17 Drive mechanism 2 device body 21 frames 22 casing 221 bottom plate 23 Top plate 231 Installation Department 232 opening 24 discs 3 Thread mechanical unit 4 chassis 41 Rotating end 42 Displacement end 5 Optical disk rotation drive mechanism 51 Spindle motor 511 rotor 512 rotation axis 52 turntable 521 magnet 522 holes 523 Flange 524 protrusion 525 recess 526 Upper center 527 Fitting part 528 Intermediate taper 529 Top taper 6 Optical pickup 61 Objective lens 62 actuator 63 Support member 64, 65 sliding part 7 Optical pickup moving mechanism 71 thread motor 72 Warm 73 Large gear 74 Small diameter gear 75 rack gear 76, 77 Guide shaft 8 disk clamper 81 First member 811 contact part 82 Second member 821 Flange part 822 taper part 83 Metal member 84 torso 85 recess 86 Positioning boss 200 8cm disc 201 central hole D Eccentricity T orbit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G11B 17/028 G11B 17/028 601Z (72) Inventor Tsuneo Ueho 1601 Sakai, Atsugi, Kanagawa Mitsumi Electric Co., Ltd. F term in Atsugi Plant (reference) 5D046 AA16 CB15 EA06 EB04 5D138 RA05 RA11 SA01 SA16 SA26 TA12 TA23 TC05 TC19 TC22 TD02

Claims (11)

[Claims] 1. A movable body, which can be moved to a loading position for loading an optical disc and a discharging position for ejecting the optical disc, which is located in front of the loading position, with respect to a device body of a disc device having a function of reproducing information recorded on the optical disc. A disc tray that is installed and used in, including a shallow concave large-diameter disc storage portion for storing a large-diameter disc and a shallow concave small-diameter disc storage portion for storing a small-diameter disc that is smaller than the large-diameter disc. A disc tray, wherein the center of the small-diameter disc storage portion is eccentric from the center of the large-diameter disc storage portion. 2. The disc tray according to claim 1, wherein the center of the small-diameter disc storage portion is eccentric to the front with respect to the center of the large-diameter disc storage portion. 3. The disc tray according to claim 1, wherein the small-diameter disc storage portion has a circular shape or a shape in which a part of the circular shape is lost. 4. The distance between the center of the small-diameter disc storage portion and the center of the large-diameter disc storage portion is 0.3 to 0.6.
The disk tray according to any one of claims 1 to 3, which has a size of mm. 5. A disc device having a function of reproducing information recorded on an optical disc, the device body, a loading position for loading the optical disc on the device body, and ejecting the optical disc in front of the loading position. A disc tray movably installed at an ejecting position, a chassis rotatably installed in the main body of the apparatus, a turntable mounted on the chassis for mounting an optical disc, and the rotation of the chassis. A state in which the turntable is located below the disc tray when the optical disc rotation driving mechanism is in the descending position. Thus, when the optical disc rotation drive mechanism is in the raised position, the loaded optical disc is loaded into the turntable. The disc tray has a shallow concave large-diameter disc storage portion for storing a large-diameter disc and a shallow concave small-diameter disc storage portion for storing a small-diameter disc smaller than the large-diameter disc. A disk device, wherein the center of the small-diameter disk storage portion is eccentric from the center of the large-diameter disk storage portion. 6. The disk device according to claim 5, wherein the center of the small-diameter disk storage portion is eccentric to the front with respect to the center of the large-diameter disk storage portion. 7. The disk device according to claim 5, wherein the orbit of the turntable when the optical disk rotation drive mechanism moves up and down is inclined with respect to the optical disk housed in the disk tray. 8. The center of the small-diameter disc storage portion intersects with the track of the center of the upper end of the turntable when the optical disc rotation driving mechanism moves up and down, and the small-diameter disc stored in the small-diameter disc storage portion. 8. The disk device according to claim 5, wherein the disk device is eccentric so as to approach the position. 9. The disk device according to claim 5, wherein the small-diameter disk storage portion has a circular shape or a shape in which a part of the circular shape is lost. 10. The disk device according to claim 5, wherein the chassis rotates with respect to the device main body around a rear end portion thereof as a rotation center. 11. The distance between the center of the small-diameter disc storage portion and the center of the large-diameter disc storage portion is 0.3 to 0.
The disk device according to claim 5, which has a size of 6 mm.