JPH0757369A - Disk driving device - Google Patents

Abstract

PURPOSE:To reduce the depth of a whole device by constituting so that a disk clamper having the diameter larger than that of a turntable of the disk can be moved between the clamping and retreating positions. CONSTITUTION:Even though the disk clamper 150 and housed CDs at the side of a disk stocker 6 are vertically overlapped when the CD is reproduced, the disk stocker 6 is moved up and down without colliding with the disk clamper 150 when the reproduced CD is returned back to the disk stocker 6, since the disk clamper 150 is being moved from the clamping position, then an optional housing stair is positioned to the disk exchanging level. Consequently, the distance between the axial line of the turntable 40 and the axial line of the housed CD is shortened in this case, therefore, the depth of the disk driving device is reduced and the whole device is miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for an optical disk, and more particularly to a disk drive device equipped with a disk autochanger.

[0002]

2. Description of the Related Art One example of this type of disk drive device is disclosed in Japanese Patent Laid-Open No. 63-204547.
The disc reproducing apparatus of this publication is provided with a disc stocker for separately storing the discs as a single unit on a plurality of storage stages, and a disc reproducing section arranged adjacent to the disc stocker. The selected disc can be transferred between the disc reproducing unit and the disc stocker.

More specifically, prior to the delivery of the disc, the entire disc stocker is moved up and down, and the selected storage stage is positioned at the disc exchange level with the disc reproducing section side as a reference. The disc can be exchanged with the disc reproducing unit. At the time of reproduction, the disc on the disc reproducing portion side, that is, the reproduction disc, is received from the turntable, and then clamped from above by the disc clamp, and
A part of the peripheral portion of the reproducing disc is in a state of overlapping with the disc in the disc stocker at a vertical interval.

In this state, when the turntable is rotated, the reproduction disc is held between the turntable and the disc clamp, so that the reproduction disc is rotated together with the turntable, whereby the reproduction unit of the disc reproduction unit is rotated. The pickup can stably read out, that is, reproduce, the information recorded on the recording surface of the reproduction disc. According to such a disc reproducing apparatus, since a vertical overlap is allowed between the reproducing disc and the disc on the disc stocker side, that is, the storage disc, the depth of the entire device can be shortened by the amount of the overlapping. There is.

[0005]

By the way, the above-mentioned turntable of the disc reproducing section must be set inside the recordable area of the reproducing disc, and the table diameter is the inner diameter of the recording area of the reproducing disc. Small compared to. Therefore, in order to stably clamp the reproducing disc on the turntable, the diameter of the disc clamper is secured to be sufficiently larger than that of the turntable.

If the diameter of the disk clamper is large as described above, the disk clamper becomes a major factor in preventing the reduction of the depth of the entire apparatus described above. That is, it is necessary to secure a predetermined gap between the disc stored in the disc stocker and the disc clamper, and to enable the entire disc stocker to move up and down. The maximum allowable overlap is limited to the difference between the outer diameter of the disc clamper and the outer diameter of the reproduction disc.

The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to drive a disk drive capable of maximally shortening the depth of the entire apparatus while securing a stable clamp for the playback disk. To provide a device.

[0008]

The disk drive device of the present invention is also selected by the disk stocker, the turntable, and the elevating means for elevating and lowering the disk stocker by this elevating means, like the disk reproducing apparatus described above. And a clamp means for rotating the disc received on the turntable integrally with the turntable, and a disc delivering means for delivering the disc between the storage stage and the turntable. ,
In the case of the present invention, the clamp means has a disk clamper having a diameter larger than that of the turntable, which is rotatably supported so that the disk can be clamped from above and below between the turntables, a clamp position of the disk clamper directly above the turntable, and the clamp position. And a moving means for moving between the retracted position and the retracted position away from the disc stocker side.

Specifically, the moving means extends above the turntable laterally from the turntable, and rotatably supports the disc clamper at its tip, while
A clamper arm rotatable about its base end in a horizontal plane, a biasing means for biasing the clamper arm in one direction, and one storage stage of the disc stocker are positioned at the disc exchange level position. In this state, the clamper arm can be rotated to move the disc clamper between the clamp position and the retracted position.

Further, in the case where the above-mentioned disc transfer means reciprocates laterally between the disc stocker and the turntable between the disc stocker and the turntable and moves in the loading direction from the disc stocker side toward the turntable. Pushes the disc on the selected storage stage to the turntable side, and conversely, when moving from the turntable side toward the disc stocker in the storage direction, pushes the disc on the turntable side back to the empty selection storage stage. If equipped with a disk replacement slider,
The arm driving means is realized by a cam mechanism that mechanically rotates the clamper arm by the reciprocating movement of the disk exchange slider.

[0011]

According to the above-mentioned disk drive device, when one selective storage stage of the disk stocker is positioned at the disk exchange level by the elevating means, the disk clamper of the clamper means is moved from the clamp position to the retracted position by the moving means. Have been moved to. In this state, even if the entire disc stocker is moved up and down, the stored disc does not collide with the disc clamper. After that, when the disc in the selective storage stage is pulled out onto the turntable as a reproduction disc by the disc transfer means, the disc clamper moves from its retracted position to the clamp position and holds the reproduction disc between itself and the turntable. Therefore, the reproduction disk on the turntable can rotate together with the turntable.

On the contrary, the reproduction disc on the turntable can be returned from the turntable onto the selective storage stage of the disc stocker by the disc transfer means after the clamp by the disc clamper is released. At this time, the disc clamper that has released the reproduction disc is moved from the clamp position to the retracted position. When the moving means includes the above-mentioned clamper arm, when the clamper arm is rotated by the arm driving means, the disc clamper moves between the clamp position and the retracted position.

Further, if the disk transferring means is provided with the above-mentioned disk exchanging slider, and the arm driving means is constituted by a cam mechanism for mechanically rotating the clamper arm by the reciprocating movement of the disk exchanging slider, the disk is moved. At the same time when the disc is pulled out from the stocker side toward the turntable, the disc clamper moves from the retracted position to the clamp position, and conversely, when the disc is returned from the turntable side to the disc stocker, the disc clamper moves from the clamp position. Move to the retracted position.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, there is shown a disk drive for a 12 cm compact disk (hereinafter simply referred to as a CD). The disk drive device includes a main chassis 2 and a sub chassis 4 located below the main chassis 2. The chassis 2 and 4 are screwed together and connected to each other.

A disk stocker 6 made of synthetic resin is arranged on one end side of the sub-chassis 4, that is, on the back side when viewed from the disk drive device, and the disk stocker 6 projects to the upper surface side of the main chassis 2. ing.
The disk stocker 6 is open on the other end side and the side facing the side of the sub chassis 4. Five upper and lower storage shelves 14 are provided in the inner portion of the disc stocker 6, and these storage shelves 14 have an arc shape extending along the inner wall 12 of the disc stocker 6. The five-tiered storage shelves 14 partition the inner part of the disc stocker 6 into six disc storage spaces. The disc stocker 6 has its bottom plate and the storage shelves 14 respectively.
It has a total of 6 disc storage stages. Therefore, by inserting the CDs into the respective disc housing spaces from the opening side of the disc stocker 6, the disc stocker 6 can accommodate a total of 6 CDs coaxially with each other. When the CD is stored, as shown in FIG. 1, the CD is in a state in which a part of the peripheral edge thereof protrudes from the disc stocker 6.

Further, as shown in FIG. 1, in the inner part of the disc stocker 6, there is a disc clipper 16 made of synthetic resin, which penetrates the deepest edge of each storage rack 14 vertically and reaches the bottom plate 8. It is arranged and this disk clipper 16
As is clear from FIG. 2, the disk stocker 6 is attached by inserting it from above. Although not shown in detail, the disc clipper 16 has eleven comb-teeth-shaped clip pieces, and when the CD is stored in the disc stocker 6, a part of the peripheral edge of the CD corresponds. It is inserted and clamped by a pair of upper and lower clip pieces.
The CD on the bottom plate of the disc stocker 6 is sandwiched between the bottom plate and the lowest clip piece.

A disc reproducing unit 20 is arranged on the lower surface side of the main chassis 2, and the disc reproducing unit 20 is positioned above the other end of the sub chassis 4. Therefore, the disc reproducing unit 20 and the disc stocker 6 are located on the front side and the rear side of the disc driving device, respectively. As shown in detail in FIG. 3, the disc reproducing unit 20 is provided with a unit frame 22 made of synthetic resin, and the unit frame 22 extends in a direction traversing the main chassis 2. A pair of self hinges 24 (only one of which is shown) are integrally formed at one end of the unit frame 22, and these self hinges 24 are attached to the main chassis 2 via attachment screws 26 thereof. Therefore, the other end of the unit frame 22 is vertically rotatable by the pair of self hinges 24.

A unit chassis 30 is elastically attached to the unit frame 22 via a plurality of support legs 28, and a pickup 38 and a turntable 40 are attached to the upper surface side of the unit chassis 30. A pickup motor 42 and a turntable motor 44 that drive the pickup 38 and the turntable 40 are attached to the lower surface of the unit chassis 30, respectively.

The turntable 40 is directly attached to the output shaft of the turntable motor 44, but the pickup 38 and the pickup motor 42 are connected via a feed gear train. This feed gear train
An output gear 46 attached to the output shaft of the pickup motor 42, and a pair of two gears that sequentially mesh with the output gear 46.
The gears 48, 50 and a rack 52 that meshes with the small-diameter gears of the two-stage gear 50 are attached to the pickup 38.

When the pickup motor 42 is driven,
The rotation of the output gear 46 is reduced by the pair of two-stage gears 48 and 50, and then converted into the reciprocating motion of the rack 52, that is, the pickup 38. Here, the reciprocating motion of the pickup 38 is set in the direction of moving toward and away from the turntable 40. As shown in FIG. 2, a disc pallet 58 made of synthetic resin is attached to the upper surface of the main chassis 2 as a disc receiving stage. The disc pallet 58 is used for the disc stocker 6 and the disc stocker 6. In order to avoid contact and abutment with the CD stored in the disc, the portion on the disc stocker 6 side is largely opened. A mounting recess 60 of 12 cm CD is formed on the upper surface of the disk pallet 58, and a mounting recess 62 for 8 cm CD is formed in the center of the mounting recess 60.

Further, the disc pallet 58 is formed with an opening 64 extending laterally from the mounting recess 62 side, and the pickup 38 and the turntable 40 can project from the upper surface of the disc pallet 58 through the opening 64.
Further, the pickup 38 can reciprocate along the opening 64. The disc pallet 58 is movable on the main chassis 2, and the movement guide of the disc pallet 58 is performed by a plurality of guides 70 mounted on both sides of the upper surface of the main chassis 2 with a space. Therefore, the disc pallet 58 can be pulled out from the main chassis 2 to the front side of the disc drive device, and the mounting recess 60 can be exposed to the outside of the disc drive device.

A guide rail 72 is integrally formed on one side edge of the disc pallet 58, and the guide rail 72 extends along the side edge of the disc pallet 58 between the front and rear ends thereof. ing. That is, the guide rail 72 extends from the disc reproducing unit 20 side to the disc stocker 6 side. Guide rail 72
A disk exchange slider 74, which constitutes a part of the disk transfer means, is movably attached on the upper side of the disk exchange slider 74.
The disk exchange slider 74 is made of a synthetic resin plate member. The inner side surface of the disk exchanging slider 74 along the guide rail 72 is a circular arc surface having a concave center portion, and the circular arc of this circular arc surface is a part of a circle having a radius larger than the radius of 12 cmCD. .
A pair of protruding pushers 7 is formed on both ends of the arc surface.
6, 78 are integrally formed, and these pushers 7
The lower portions of 6, 78 are tapered.

A rack 80 is formed on the outer side surface of the disk exchanging slider 74, and a rack 82 is formed on the outer side surface of the disk pallet 58 on the slider 74 side at a part of the inner side thereof. Disk replacement slider 74
A pair of pinions 84 and 86 are arranged in the central region of the side edge of the main chassis 2 located on the side, and these pinions 84 and 86 project upward. The pinions 84 and 86 have a tooth width capable of meshing with the rack 80 of the disk exchange slider 74 and the rack 82 of the disk pallet 58, and are positioned along the side edge of the main chassis 2 so as to be spaced from each other. A pair of pinions 8
4, 86 are connected to a loading motor 88 via a gear train (not shown), and can receive the power from the motor 88 and rotate in the same direction in the forward and reverse directions. The loading motor 88 is attached to the lower surface side of the main chassis 2, a part of which is shown in FIG.

When the disk exchange slider 74 is in the disk stocker 6 side, that is, in the storage position as shown in FIG. 2, the rack 80 of the disk exchange slider 74 meshes only with the pinion 86, while the rack of the disk pallet 58 is engaged. 82 does not mesh with any of the pinions 84 and 86. In this state, the pair of pinions 8
When the disks 4, 86 are rotated in one direction by the loading motor 88, the disk exchange slider 74 is moved to its rack 80.
And the pinion 86 mesh with each other to slide on the guide rail 72 from the storage position toward the front side of the disk pallet 58, and in this process, the rack 80 moves to the other pinion
Also mesh with.

When the disk exchange slider 74 reaches the front end of the guide rail 72 and this is detected by a sensor (not shown), the rotation of the loading motor 88 is stopped and the disk exchange slider 74 is placed in the mounting recess of the disk pallet 58. It is located to the side of 60, ie, the loading position. When the loading motor 88 is further driven in the same direction, the disc exchange slider 74 further slides from its loading position, and the disc pallet 5 is moved.
The disk pallet 58 is pulled out from the home position on the main chassis 2 by contacting the front edge of the disk 8. By this withdrawal, the rack 82 of the disk pallet 58 sequentially meshes with the pinions 86, 86, so that the withdrawal is continued.

The disk pallet 58 is pulled out to the front side of the disk drive device by a predetermined length, and when this is detected by the sensor, the driving of the loading motor 88 is stopped. At this time, the rack 8 of the disk pallet 58
2 is in a state of only meshing with the pinion 84. When the disc pallet 58 is pulled out from the home position, a new CD can be placed on the disc pallet 58 when the disc pallet 58 is empty, and when a CD is present on the disc pallet 58, CD
Can be taken out from the disk pallet 58.

On the other hand, when the disk replacement slider 74 is in the loading position and the loading motor 88 is driven in the reverse direction from this state, in this case, the disk replacement slider 74 slides from the loading position side toward the storage position. To do. When the disc replacement slider 74 reaches the storage position and is detected by the sensor, the driving of the loading motor 88 is stopped, and the disc replacement slider 7 is stopped.
4 is positioned at the storage position on the side of the disk stocker 6.

Therefore, the disk replacement slider 74
Can be reciprocated between the storage position on the disk stocker 6 side and the loading position on the mounting recess 60 side of the disk pallet 58 by rotating the loading motor 88 in the forward and reverse directions. Now, assuming that one selected storage stage of the disc stocker 6 is positioned at the same level with respect to the disc pallet 58, that is, at the disc exchange level, the disc pallet 58 and the disc pallet 58 are moved by the reciprocating movement of the disc exchange slider 74. Disc stocker 6
CDs can be exchanged with the selected storage tray.

Explaining in detail the exchange of the CD, FIG. 4 shows a state in which the disc exchange slider 74 is in the storage position and the CD is already stored in the selective storage stage of the disc stocker 6. In this state, when the disk exchange slider 74 slides from its storage position toward the loading position, one pusher 78 abuts the peripheral edge of the CD,
The CD is extruded from the disc stocker 6 so that its peripheral edge is lifted, and is transferred onto the disc pallet 58 as shown in FIG.

Here, as is apparent from FIG. 5, the CD transferred to the disc pallet 58, that is, the CD on the mounting recess 60, is a part of the CD stored in the disc stocker 6. Are in a state of overlapping vertically with a gap. Disk exchange slider 7 shown in FIG.
4 is slightly returned from the loading position to the storage position side, whereby the pair of pushers 76 and 78 of the disc exchange slider 74 are separated from the transferred CD. In other words, the rotation of the loading motor 88 is not stopped immediately when the disk replacement slider 74 reaches the loading position and is detected by the sensor, but the loading motor 88 is reversely rotated by a predetermined amount, and then the driving is stopped. Be stopped.

From the state shown in FIG.
When the disk slides toward the storage position, the other pusher 76 of the disk exchanging slider 74 causes the disk pallet 5 to move.
The upper CD is pushed back toward the disc stocker 6 and stored in an empty selective storage stage of the disc stocker 6. Also in this case, the disk replacement slider 74 reaches the storage position,
The rotation of the loading motor 88 is not stopped immediately when this is detected by the sensor.
The loading motor 88 is reversely rotated by a predetermined amount, and then its driving is stopped. Therefore, even in the case of FIG. 4, the disc exchange slider 74 is slightly returned from the storage position to the loading position side, and the disc exchange slider 74 is moved.
The pair of pushers 76 and 78 are separated from the CD on the selective storage stage.

By the way, as is apparent from the above description, in order to exchange a CD between the CD in any storage stage of the disc stocker 6 and the disc pallet 58, one storage stage of the disc stocker 6 should be replaced. The disc stocker 6 must be able to move up and down in order to be positioned at the disc exchange level. Therefore, the disc stocker 6 is shown in FIG.
As shown in FIG. 2, the elevator base 92 is fixed by being screwed onto the elevator base 92, and the elevator base 92 is supported by the sub-chassis 4 at both front and rear ends thereof via a pair of pantograph mechanisms 94. ing.

A horizontal shaft 96 is provided on one side edge of the lift base 92, and the horizontal shaft 96 penetrates the lift base 92 so as to straddle a pair of pantograph mechanisms 94, and the horizontal shaft 96 is attached to the lift base 92. It is rotatably supported. Pinions 98 are attached to both projecting ends of the horizontal shaft 96, and these pinions 98 are respectively engaged with a pair of racks 100 obtained by cutting and raising the sub chassis 4.

On the other hand, as shown in FIG. 6, a nut 102 is fixed to the lifting table 92 at the side edge opposite to the horizontal shaft 96, and a hollow feed screw 104 is attached to the nut 102. It is threaded through the top and bottom. A post 106 standing upright from the sub chassis 4 is inserted into the feed screw 104.
06 is projected from the upper end of the feed screw 104. The protruding end of the post 106 is supported by a bracket 108 extending from the main chassis 2.

Further, a gear 110 is integrally formed at the lower end of the feed screw 104.
No. 0 can be connected to the common motor 114 through the ascending / descending side gear train 112 extending on the sub chassis 4 and the clutch gear 118 integrally having large and small gears. That is,
The shared motor 114 is supported by the sub-chassis 4 via a motor base, and has an output shaft protruding below the motor base. A small-diameter gear 116 is attached to the output shaft of the shared motor 114, and the small-diameter gear 116 has a tooth surface with a wide tooth width.

The small diameter gear 116 meshes with the large gear 118L of the clutch gear 118.
Reference numeral 18 is rotatably supported by a support shaft 120 provided upright from the sub chassis 4. The clutch gear 118 is vertically movable along the support shaft 120 with the large gear 118L facing upward, and a compression coil is provided between the spring bearing fixed to the upper end of the support shaft 120 and the clutch gear 118. A spring 122 is arranged. This compression coil spring 1
22 always urges the clutch gear 118 downward,
As a result, the clutch gear 118 is positioned at the lowered position.

The ascending / descending side gear train 112 is located in the vicinity of the clutch gear 118, that is, near the feed screw 104 described above, and integrally includes large and small gears.
The small gear 124S of the two-stage gear 124 is meshed with the gear 110 of the feed screw 104 via the intermediate gears 126, 128 and 130. The gears 124, 126, 128, 130 are also rotatably attached to the support shafts erected from the sub chassis 4.

In the state shown in FIG. 6, the clutch gear 11
The small gear 118S of No. 8 and the large gear 124L of the two-stage gear 124 are disengaged from each other.
The meshing of 124L can be interrupted by the clutch actuator 132 shown in FIG. 7. The clutch actuator 132 includes a seesaw lever 134, and the seesaw lever 134 is rotatably supported by the sub chassis 4 via a pair of brackets 136. One end of the seesaw lever 134 is normally located below the small gear 118S of the clutch gear 118, and the seesaw lever 134 is in contact with the sub chassis 4 by its own weight. The one end of the seesaw lever 134 has a clutch gear 118.
It has a bifurcated shape that sandwiches the support shaft 120 of
One end of the seesaw lever 134 is not shown in FIG.

On the other hand, the other end of the seesaw lever 134 in a floating state is bent upward, and a magnetic body 137 such as an iron plate is attached to the other end, and in the vicinity of the seesaw lever 134. An electromagnet 138 is arranged so as to face the other end. When the electromagnet 138 is excited, the electromagnet 138 attracts the other end of the seesaw lever 134 and rotates the seesaw lever 134 in a direction in which one end thereof rises, and one end of the seesaw lever 134 raises the clutch gear 118. Let As a result, the small gear 118S of the clutch gear 118 is the two-stage gear 124
It will mesh with the large gear 124L. In this state,
When the shared motor 114 is rotated in one direction, the rotation is decelerated via the clutch gear 118 and the elevating side gear train 112 and is transmitted to the gear 110 of the feed screw 104 to rotate the feed screw 104.

The rotation of the feed screw 104 moves the elevator base 92, that is, the disk stocker 6 up and down according to the rotation direction, so that the selected storage stage (one of the storage shelves or its bottom plate) of the disk stocker 6 is moved. It is positioned at the same disc exchange level as the disc pallet 58. When the electromagnet 138 is demagnetized,
One end of the seesaw lever 134 and the clutch gear 118 descend due to their own weight, and the small gear 1 of the clutch gear 118
The engagement between 18S and the large gear 124L of the two-stage gear 124 is released.

Referring again to FIG. 6, the clutch gear 1
Another two-stage gear 140 is disposed in the vicinity of 18 on the opposite side of the two-stage gear 124.
The reference numeral 40 is also rotatably attached to a support shaft erected from the sub chassis 4 with its large gear 140L facing downward. 2 when the clutch gear 118 is in the lowered position
The large gear 140L of the step gear 140 meshes with the small gear 118S of the clutch gear 118, but the clutch gear 11
8 is lifted by the clutch actuator 132, the small gear 118S of the clutch gear 118 shifts to the second gear 1
The gear 40 is separated from the large gear 140L of the gear 40 and meshes with the large gear 124L of the two-stage gear 124 as described above.

The small gear 140S of the two-stage gear 140 meshes with the gear 144 of the cylindrical cam 142, so that the cylindrical cam 1
42 is rotatably supported by a support shaft provided upright from the sub-chassis 4, and has a spiral cam groove 146 on the outer peripheral surface thereof. As shown in FIG. 3, the cylindrical cam 142 is arranged close to the end of the disc reproducing unit 20 opposite to the self-hinge 24. On the other hand, from the disc reproducing unit 20, that is, from the other end of the unit frame 22, a cam follower 14 having a pin shape is formed.
8 is projected, and this cam follower 148 is inserted into the cam groove 146 of the cylindrical cam 142.

When the clutch gear 118 is in the lowered position, that is, the small gear 118S of the clutch gear 118 is 2
When the common motor 114 is rotated while meshing with the large gear 140L of the stage gear 140, this rotation is decelerated via the clutch gear 118, the two-stage gear 140 and the gear 144 and transmitted to the cylindrical cam 142. Cylindrical cam 14
Rotate 2.

The rotation of the cylindrical cam 142 is caused by the rotation of the cam groove 146.
Along the track, the cam follower 14 of the disc playback unit 20
8 and therefore the disc playback unit 20
Rotates from a rest position below the disc pallet 58 to an upper reproducing position about the pair of self-hinge 24, and its pickup 38 and turntable 40.
Rises to the position shown by the chain double-dashed line in FIG. At this time, the turntable 40 projects above the disc pallet 58 through the opening 64.

Here, before the disc reproducing unit 20 is rotated upward, a CD is placed on the disc pallet 58.
When the disc is already placed, the CD is received on the turntable 40 by the upward rotation of the disc reproducing unit 20, and the hub of the turntable 40 is fitted into the center hole of the CD. After this, the disc reproducing unit 20,
That is, when the turntable 40 is further raised, the CD on the turntable 40 will be clamped between the turntable 40 and the disc clamper 150. In the following, the clamping means including the disc clamp 150 will be described. The configuration will be described.

The clamping means is provided with a cross plate 152 which is arranged so as to straddle the upper side of the main chassis 2, and the cross plate 152 extends along the disc reproducing unit 20. Cross plate 152
Extension portions 154 bent downward are integrally formed from both ends of the main chassis 2.
It is fixed to the side of. Therefore, the disc pallet 58 on the main chassis 2 is positioned between the cross plate 152 and the disc reproducing unit 20.

As is apparent from FIG. 1, a rim 156 is raised from one side edge of the cross plate 152 located on the disc stocker 6 side, and both ends of the rim 156 are cut out. In addition, the cross plate 152
An arcuate bulge 158 is formed in the central region of the other side edge of the cross plate 152, and the bulge 158 is formed on the cross plate 152.
A guide groove 160 from the rim to the rim 156 is formed.
Note that, in FIG. 4, the cross plate 152 is only indicated by a two-dot chain line, but the shape of the guide groove 160 is clear from this FIG.

A clamper arm 162 is arranged on the cross plate 152, and the clamper arm 162 is provided.
Extends from the guide groove 160 to one end of the cross plate 152, that is, one end located on the disk exchange slider 74 side. The clamper arm 162 is supported at one end of the cross plate 152 via a pin 164, and is rotatable on the cross plate 152 about the pin 164.

As shown in FIG. 3, a shaft 166 projects from the upper surface of the above-mentioned disc clamper 150, and this shaft 166 guides the guide groove 16 of the cross plate 162.
0 and a hole 168 formed at the tip of the clamper arm 162
And is connected to the stop disk 170 through. This stop disk 170 has a diameter larger than the diameter of the hole 168,
As a result, the disc clamper 150 is suspended from the clamper arm 162. Further, the shaft 166 of the disk clamper 150 is in a state of being loosely fitted in the guide groove 160 of the cross plate 152 and the hole 168 of the clamper arm 162. As a result, the disc clamper 150 is attached to the clamper arm 162 with appropriate play in the horizontal and vertical directions.

As is clear from the figure, the disk clamper 150 has a larger diameter than the turntable 40 described above, and the lower surface of the disk clamper 150 is surrounded by a recess (not shown) which can receive the hub of the turntable 40. A magnet is embedded in the turntable 40.
A magnetic material such as an iron plate is attached to the upper surface of the. As described above, when the disc clamper 150 is rotatably attached to the tip of the clamper arm 162, the disc clamper 150 moves along the guide groove 160 of the cross plate 152 as the clamper arm 162 rotates. You can

Further, a tension coil spring 172 is stretched between the tip of the clamper arm 162 and the rim 156 of the cross plate 152. The tension coil spring 172 always rotates the clamper arm 162 toward the rim 156. I am motivated. Therefore, when the clamper arm 162 receives the biasing force of the tension coil spring 172, it comes into contact with the rim 156 of the cross plate 152. At this time, the clamper arm 162 comes into contact with the rim 156 via the stopper 174 thereof. . This state is shown in FIG. 5, in which case the disk clamper 150
Are positioned substantially coaxial with the turntable 140.

A cam arm 176 facing the disc stocker 6 is integrally formed from the end of the clamper arm 162 on the pin 164 side, that is, from the base end thereof. Therefore, the clamper arm 162 and the cam arm 176 are formed.
Is L-shaped as a whole. Cam arm 176
Is projected from the cross plate 152, and a roller 178 is rotatably attached to the lower surface of the tip thereof.

On the other hand, the above-mentioned disk exchange slider 74
A cam 180 that cooperates with the roller 178 is integrally formed on the upper surface of the. The cam 180 has a plate shape extending from the front end to the rear end of the disc exchange slider 74, and the rear end edge thereof is inclined toward the disc stocker 6 side. That is, the inner surface of the cam 180 is formed as the cam surface 182. The cam surface 182 is a parallel surface extending parallel to the guide rail 72 from the front end of the disk exchange slider 74, and a parallel surface of the parallel surface. And an inclined surface inclined from the end.

As shown in FIG. 4, when the disk replacement slider 74 is on the storage position side described above, the roller 178 of the cam plate 176 is in rolling contact with the cam 180, that is, the parallel surface of the cam surface 182. In this case, the cam plate 176, that is, the clamper arm 162 is in the state of being rotated counterclockwise as viewed in FIG. 4 against the biasing force of the tension coil spring 172. In this state, the disc clamper 150 is positioned at the retracted position separated from the turntable 40 on the side opposite to the disc stocker 6.

On the other hand, as shown in FIG. 5, when the disk replacement slider 74 is on the loading position side, the roller 178 of the cam plate 176 is moved to the cam surface 182 of the cam 180.
As described above, the clamper arm 1
62 receives the biasing force of the tension coil spring 172, rotates clockwise, and is in contact with the rim 154 of the cross plate 152 via the stopper 174 thereof. In this state, the disc clamper 150 will not turn the turntable 40.
Is located in a clamp position located above.

Therefore, in the case of this embodiment, the disc clamper 150 is moved to the retracted position and the clamped position in association with the reciprocating movement of the disc exchange slider 74, that is, the transfer of the CD between the disc stocker 6 and the disc pallet 58. Will be moved between. In this respect, referring to FIGS. 8 and 9, it is clear that the disc clamper 150 moves between the retracted position and the clamp position as the CD is delivered. That is, as shown in FIG. 8, all the CDs are stored in the disc stocker 6, and at this time, the disc clamper 150 is at the retracted position away from the upper side of the turntable 40 to the side opposite to the disc stocker 6. It is in.

From this state, when the selected CD on the disc stocker 6 side is transferred onto the disc pallet 58 by the disc exchange slider 74, at this time, the disc clamper 150 retracts as shown in FIG. It can be seen that it has been moved from the position to the clamp position above the turntable. When in the clamp position, a part of the disc clamper 150 vertically overlaps the storage CD of the disc stocker 6. However,
At this time, a sufficient space is secured between the disc clamper 150 and the storage CD located above the disc clamper 150, and the disc clamper 150 and the storage CD do not contact or interfere with each other.

Thereafter, when the disc reproducing unit 20 is rotated upward from the state of FIG. 9 as described above, the CD on the disc pallet 58 is turned on the turntable 4.
0, and the CD is placed on the turntable 40 and disc clamper 1 as shown in FIG.
It is clamped between 50 and 50 by magnetic attraction. When the turntable 40 is rotated in this state, the CD on the turntable 40 is rotated together with the turntable 40 in a state of being levitated from the disc pallet 58, and the information recorded on the CD is reproduced by the pickup 38. It

When a storage command for the reproduction CD is output, the disc reproduction unit 20 descends from the reproduction position toward the rest position, whereby the disc clamper 150 is released.
The CD is unclamped, and the CD is returned to the disc pallet 58. After that, the disc exchange slider 74 moves from the loading position to the storage position, so that the CD on the disc pallet 58 is returned to the disc stocker 6 as described above.

According to the above-described disk drive device, the disk clamper 150 is not fixed to the clamp position above the turntable 40 and can be moved between the clamp position and the retracted position. 40 and the disk stocker 6 can be arranged close to each other. That is, as shown in FIG. 10, even when the disc clamper 150 and the stored CDs on the disc stocker 6 side are vertically overlapped when the CD is reproduced,
When the reproduced CD is returned to the disc stocker 6, since the disc clamper 150 has moved from the clamp position to the retracted position as shown in FIG. 8, the disc stocker 6 does not collide with the disc clamper 150. It can be raised and lowered and any storage stage can be positioned at the disc exchange level.

Therefore, in the case of the disk drive device of the present invention, the distance L corresponding to the overlap between the disk clamper 150 and the stored CD shown in FIGS. 5 and 10.
Therefore, the distance between the axis of the turntable 40 and the axis of the storage CD, that is, the distance D1 (FIG. 5) between the axes can be shortened, so that the depth of the disk drive device can be shortened and the overall size thereof can be reduced. be able to.

Further, if the layout around the turntable is improved, the distance D1 between the axes can be shortened by the maximum distance corresponding to the radius difference between the turntable 40 and the disk clamper 150, as indicated by LM in FIG. Becomes In addition,
In FIG. 5, D2 indicates the minimum center distance between the turntable 40 and the storage CD when the disc clamper 150 is fixed at the clamp position.

Further, since the disc clamper 150 is selectively positioned between the clamp position and the retracted position in association with the reciprocating movement of the disc exchange slider 74, another drive source for the disc clamper 150 is not required. .
In addition, the disc clamper 150 has a clamper arm 162.
If it is rotatably supported, a cam mechanism for rotating the clamper arm 162 in conjunction with the reciprocating movement of the disc exchange slider 74 can be easily realized, and the drive system of the disc clamper 150 becomes complicated. Absent.

The present invention is not limited to the above-described embodiment, but various modifications can be made. For example, it is possible to separately provide a drive source for rotating the clamper arm 162. In this case, the disc clamper 150 is moved before the disc stocker 6 is moved up and down, not by the reciprocating movement of the disc exchange slider 74. It may be moved from the clamp position to the retracted position.

[0065]

As described above, in the disk drive device of the present invention, the disk clamper having a diameter larger than that of the disk turntable can be moved between the clamp position and the retracted position. Even when the disc clamp is in a state of vertically overlapping with the disc on the disc stocker side when the disc is clamped to the turntable, the disc clamper can be released from the clamp position to the retracted position when the disc stocker moves up and down. The disc stocker can be moved up and down. Therefore, the distance between the disc stocker and the turntable can be shortened regardless of the presence of the disc clamper,
There are advantages that the depth of the disk drive device can be reduced and the overall size of the disk drive device can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a disk drive device.

2 is an exploded perspective view of the disk drive device of FIG. 1. FIG.

FIG. 3 is a front view of a disc reproducing unit.

FIG. 4 is a plan view of the disk drive device with the disk exchange slider in the storage position.

FIG. 5 is a plan view of the disk drive device with the disk exchange slider in the loading position.

FIG. 6 is a side view showing a lifting gear train of the disc stocker and a gear train for rotating the disc reproducing unit.

FIG. 7 is a front view of a clutch actuator for operating the clutch gear of FIG.

FIG. 8 is a schematic cross-sectional view of the disk drive device showing a state where all the CDs are stored in the disk stocker.

9 is a diagram showing a state where the CD is pulled out from the state shown in FIG. 8 onto a disc pallet.

10 is a diagram showing a state where the CD is clamped between the turntable and the disc clamper from the state of FIG. 9;

[Explanation of symbols]

 6 Disc Stocker 14 Storage Shelf (Storage Stage) 20 Disc Playback Unit 40 Turntable 58 Disc Pallet 74 Disc Exchange Slider 112 Elevating Side Gear Train (Elevating Means) 150 Disc Clamper (Clamping Means) 162 Clamper Arm 174 Pulling Coil Spring 176 Cam Arm 178 Roller 180 Cam 182 Cam surface

Claims (3)

[Claims] 1. A disk stocker (6) having a plurality of storage stages vertically separated from each other and storing a disc in each storage stage so that the disc can be pulled out, and a disc stocker side provided on the disc pulling side of the disc stocker. The turntable (40) that receives the discs partially overlapped with each other vertically on the storage disc and the disc stocker are moved up and down to set the disc exchange level to 1
Lifting means (112) for selecting and positioning one storage stage
A disk transfer means (74) for transferring a disk between the selective storage stage and the turntable, and a clamp means for rotating the disk received on the turntable together with the turntable. The clamp means includes a disc clamper (150) having a diameter larger than that of the turntable rotatably supported so that the disc can be vertically clamped between the turntables.
And a moving means (162, 180) for moving the disc clamper between a clamp position immediately above the turntable and a retracted position away from the clamp position on the side opposite to the disc stocker side. Characteristic disk drive device. 2. The moving means extends above the turntable laterally from the turntable, rotatably supports the disc clamper at its tip, and pivots in the horizontal plane about its base end. Possible clamper arm (16
2), urging means for urging the clamper arm to rotate in one direction, and one storage stage of the disk stocker positioned at the disk exchange level position, the clamper arm is rotated to move the disk. Arm drive means (1) for moving the clamper between the clamp position and the retracted position.
80) is provided, and the disk drive device of Claim 1 characterized by the above-mentioned. 3. The disc transfer means reciprocates laterally between the disc stocker and the turntable between the disc stocker and the turntable and moves in the loading direction from the disc stocker side toward the turntable. Pushes the disc on the selected storage stage to the turntable side, and conversely, when moving from the turntable side toward the disc stocker in the storage direction, pushes the disc on the turntable side back to the empty selection storage stage. A disc exchange slider (74) is provided, and the arm driving means is provided with a cam mechanism (180, 182) for mechanically rotating the clamper arm by reciprocating movement of the disc exchange slider. The disk drive device according to claim 2.