JPH0729282A - Disk driving device - Google Patents

Abstract

PURPOSE:To maintain an adequate spacing between a disk to be reproduced and a housed disk and to surely prevent the contact thereof by setting the height of a disk stocker at the same level as a step for receiving the disk of the selected housing step and drawing out the disk, then further rising up the disk stocker according to the rising quantity by a clamp. CONSTITUTION:The disk (CD) stocker 6 is lifted by a common motor 114 via a lifting side gear train 112 until the levels of the housing step 14 for the selected CD and the CD pallet 58 are matched. The CD drawn out of the housing step 14 is then clamped with a clamper by rising a turn table 40 by means of a cylindrical cam 143 which is driven via a gear by the motor 114. The gear train 112 and the motor 114 are meshed with each other by a clutch at this time and the stocker 6 is risen by a prescribed amt. according to the height at which the CD to be reproduced is risen by the clamp. As a result, the sufficient vertical spacing between the CD to be reproduced and the housed CD of the housing step 14 is obtd., by which the contact is surely prevented.

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 accommodating a plurality of discs as a single unit in the vertical direction, and a disc reproducing unit arranged adjacent to the disc stocker. Discs are being delivered between the two.

During reproduction, the disc on the disc reproducing section side, that is, the used disc is partially overlapped with the storage disc on the disc stocker side in the vertical direction, and in this state, the used disc. Is rotated to play it. According to the disc reproducing device, since the used disc and the accommodating disc are allowed to overlap each other in the vertical direction, the depth of the disc reproducing device can be less than twice the diameter of the disc, and the disc stocker is the disc tray. Since the disk is stored as it is without using, the storage pitch between the disks can be shortened,
The disk stocker can be made thinner. That is, not only the depth of the disc reproducing apparatus but also its height is lowered, and there is an advantage that the whole size can be reduced.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The disc reproducing section of the above-mentioned disc reproducing device includes a receiving stage for receiving the disc pulled out from the disc stocker, and a turntable and a disc clamper arranged above and below the receiving stage. I have it. The disc on the receiving stage is lifted up from the receiving stage by the rise of the turntable, and is clamped between the turntable and the disc clamper to become the used disc, which is rotated together with the turntable. It

Here, the rising height of the disc from the receiving stage is such that the used disc does not come into contact with the storage disc on the disc stocker side, that is, within the storage pitch of the storage disc, but Depending on the combination with the storage disc, the used disc may rotate while coming into contact with the storage disc.

That is, although the thickness and the warp of the disc are suppressed within their allowable tolerances, the thickness and the warp are different for each disc. The gap between the disc and the disc becomes very narrow. Further, since the disk stocker is an integrally molded product of synthetic resin, it is not possible to stabilize the molding accuracy, and depending on the number of storage disks, the weight of the storage disks causes the disk stocker to bend, It is difficult to hold each storage disc horizontally.

Therefore, if the above-mentioned phenomenon occurs at the same time on the disc side and the disc stocker side, the disc to be used may come into contact with the storage disc and rotate during reproduction, and the disc reproduction is unstable. become. In order to solve the above-mentioned problems, it is sufficient to increase the distance between the discs stored in the disc stocker, that is, the storage pitch, but in this case, the height of the disc stocker becomes large, and the overall size of the device can be reduced. It will not be possible.

The present invention has been made based on the above-mentioned circumstances, and an object thereof is to reliably prevent contact between a used disk and a storage disk at the time of reproduction without increasing the size of the disk stocker. Another object of the present invention is to provide a disk drive device capable of stable reproduction.

[0009]

DISCLOSURE OF THE INVENTION A disk drive device according to the present invention has a plurality of storage stages, and a disk is placed on each storage stage with a predetermined pitch in the up-down direction. A disc stocker that allows the discs to be pulled out and stored, and a receiving stage that is provided on the disc drawer side with respect to the disc stocker and that receives the discs with the storage discs on the disc stocker side partially overlapping with each other with a vertical gap. And elevating means for moving the disc stocker up and down to position the selected storage stage of the disc stocker at the same level with respect to the receiving stage, and the disc passing between the receiving stage and the selected storing stage Means and the disc on the receiving stage together with the turntable are raised within the above-mentioned pitch range and clamped. When the clamping means for enabling rotate integrally with the turntable, which receives the disk to the stage side are supplied, and a lifting means for raising the disk stocker predetermined height through the lifting means.

A motor in which the lifting means and the clamping means are common, an up-and-down gear train and a clamp-side gear train which receive power from this motor, and one of these lifting-side and clamp-side gear trains are meshed and rotated by the motor. And a clutch gear that transmits the power of the motor to the one gear train is provided, the lift device operates when the clutch gear and the clamp-side gear train are connected via the clutch gear. At the end of the operation of the clamp means, a distribution gear that meshes with both the clutch gear and the elevating side gear train to distribute the power of the motor to the elevating side gear train is provided. The distribution gear can be attached to the power distribution lever that rotates in conjunction with the clamp means at the end of the operation of the clamp means.

Further, when the disc transfer means reciprocates between the disc stocker and the receiving stage and moves from the disc stocker side toward the receiving stage, the storing discs on the selective storing stage are pushed onto the receiving stage. On the contrary, when the disc is moved from the receiving stage toward the disc stocker and the disc on the receiving stage is pushed back to the empty selective storing stage and is accommodated by the disc exchanging slider, the lift means includes the disc exchanging slider. Is provided at the disc loading position on the receiving stage side, and a detector that outputs a detection signal is provided, and when the detection signal from the detector is received, the elevating means is operated.

[0012]

According to the disk drive apparatus described above, when one storage stage of the disk stocker is selected, the selected storage stage is positioned at the same level as the receiving stage by the operation of the elevating means. In this state, the disc on the selective storage stage is pulled out onto the receiving stage by the disc transferring means, and the disc on the receiving stage is actuated by the clamping means to lift the disc from the receiving stage. Clamped on the table.

When the disc is being supplied to the receiving stage side, that is, when the disc is clamped on the receiving stage or on the turntable, the lifting and lowering means of the disc stocker are operated by the lifting means so that the disc stocker has a predetermined position. Only the height is raised. Therefore, the space between the target storage disk on the storage tray next higher than the selected storage tray of the disk stocker and the disc on the receiving stage side is enlarged.

When the lift means is provided with the power distribution lever and the distribution gear, the end of the operation of the clamp means, that is,
Just before the disc is clamped on the turntable,
The distribution gear of the lift means meshes with both the ascending / descending gear train and the clutch gear, whereby the disk stocker is raised by the operation of the ascending / descending means, and the target storage disk on the disk stocker side and the disk on the turntable are The space is enlarged.

When the lift means is provided with a detector for detecting the presence or absence of the disc exchange slider at the loading position, the lift means raises the disc stocker via the elevating means as soon as the disc is supplied onto the receiving stage. In this case, the distance between the disc on the receiving stage and the target storage disc on the disc stocker side is enlarged.

[0016]

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. The disk stocker 6 projects to the upper surface side of the main chassis 2. ing. The disk stocker 6 comprises an upper plate 8, a lower plate 10 and a peripheral wall 12 connecting the upper plate 8 and the lower plate 10.
Is opened on the other end side and the side facing the side of the sub-chassis 4.

From the inner surface of the peripheral wall 12, upper and lower five storage shelves 1
4 are projected, and these storage shelves 14 have an arc shape extending along the peripheral wall 12. The storage shelf 14 divides the inner part of the disc stocker 6 into six disc storage spaces. The disc stocker 6 inserts CDs into the respective disc storage spaces from the opening side thereof, so that a total of six CDs are vertically arranged. There is a predetermined storage pitch, and they can be stored coaxially with each other. Therefore, the disc stocker 6 has a total of 6 disc storage stages by the lower plate 10 and the 5 storage shelves 14.

When the CD is stored, as shown in FIG. 3, a part of the peripheral edge of the CD is placed on the storage step 14, and the remaining peripheral edge is protruding from the disc stocker 6. . Further, the leading edges of the storage shelves 14 and the lower plate 8 are tapered so that CDs can be received easily. Further, as shown in FIG. 3, a disc clipper 16 made of a synthetic resin is arranged in the inner part of the disc stocker 6 so as to vertically penetrate the deepest edge of each storage rack 14 and reach the lower plate 8. As is apparent from FIG. 2, the disc clipper 16 is attached so as to be insertable from above the disc stocker 6.

The disk clipper 16 has eleven elastically deformable clip pieces 18, which are comb-shaped. When the CD is stored in the disc stocker 6, a part of the peripheral edge of the CD is inserted between the corresponding pair of upper and lower clip pieces 18 and is sandwiched by the pair of clip pieces 18. The CD on the lower plate 8 is sandwiched between the lower plate 8 and the lowest clip piece 18.

On the lower surface side of the main chassis 2, the disc reproducing unit 2 is located above the other end of the sub chassis 4.
0 is arranged, and 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 as viewed from the disc driving device. As shown in FIG. 4, the details of the disc reproducing unit 20 are as follows.
A unit frame 22 made of synthetic resin is provided, and the unit frame 22 extends in a direction traversing the main chassis 2. A pair of self-hinge 24 is integrally formed at one end of the unit frame 22, and the self-hinge 24 is attached to the main chassis 2 via a mounting screw 26 thereof. Therefore, the other end of the unit frame 22 is rotatable up and down by the pair of self hinges 24.

A unit chassis 30 is attached to the unit frame 22 via a plurality of support legs 28. The support leg 28 is a rubber spacer 32 with a flange.
And a compression coil spring 34 surrounding the rubber spacer 32, and a connecting tool 36 for connecting the unit frame 20 and the unit chassis 30 to each other by applying a predetermined preset load to the rubber spacer 32 and the compression coil spring 34. Has become.

A pickup 38 and a turntable 40 are mounted on the upper surface of the unit chassis 30 so as to face upward, and a pickup motor 42 and a turntable for driving the pickup 38 and the turntable 40 are mounted on the lower surface of the unit chassis 30. A motor 44 is attached. 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. The feed gear train includes an output gear 46 attached to the output shaft of the pickup motor 42, a pair of two-step gears 48 and 50 that sequentially mesh with the output gear 46, and a rack 52 that meshes with a small-diameter gear of the two-step gear 50. The rack 52 is 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. A cross plate 54 extending along the disc reproducing unit 20 is arranged above the main chassis 2, and both ends of the cross plate 54 are bent downward and attached to the main chassis 2.

The cross plate 54 is the turntable 40.
And a clamper 56 that is opposed to the cross plate 54. The clamper 56 is attached to the cross plate 54 with appropriate play in the horizontal direction and the axial direction thereof. The upper surface of the turntable 40 has a magnetic material such as an iron plate in a part thereof, while the lower surface of the clamper 56 forms a pair with the magnetic material of the turntable 40 and is a magnet forming a part of the clamping means. (Not shown) is buried.

As shown in FIG. 2, a disc pallet 58 made of synthetic resin is mounted on the upper surface of the main chassis 2 as a disc receiving stage. The disc pallet 58 is shown in FIGS. As is clearer with reference to FIG. 5, it is positioned between the cross plate 54 and the disc reproducing unit 20. The disc pallet 58 has a large opening on the disc stocker 6 side so as to avoid interference with the disc stocker 6 and the CDs stored in the disc stocker 6. 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 be projected from the upper surface of the disc pallet 58 through the opening 64.
Further, the pickup 38 can reciprocate along the opening 64. In addition, in FIG. 2, reference numerals 66 and 68 indicate
A detection hole for optically detecting the presence or absence of a CD on the mounting recesses 60 and 62 is shown.

The disk pallet 58 is the main chassis 2
The disc pallet 58 can be moved upward and is guided by a plurality of guides 70 mounted on both sides of the upper surface of the main chassis 2 at intervals. Therefore, the disk pallet 58 is pulled out from the main chassis 2 to the front side, and the mounting recess 60 can be exposed to the outside of the disk drive device.

A guide rail 72 is integrally formed on one side edge side of the disc pallet 58, and the guide rail 72 extends between both ends of the disc pallet 58 and extends along the side edge thereof. That is, the guide rail 72 extends from the disc reproducing unit 20 side to the disc stocker 6 side. On the guide rail 72, a disc exchange slider 74, which constitutes a part of the disc transfer means, is movably attached, and the disc 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 76, 7 is formed on both ends of the arc surface.
8 is integrally formed, and these pushers 76, 78
The lower part of is tapered.

A rack 80 is formed on the outer side surface of the disk exchanging slider 74, and a rack 82 is also formed on the outer side surface of the disk pallet 58 on the slider 74 side at a part on the back side thereof. Further, a rim that is continuous with the upper surface of the disk replacement slider 74 is laterally projected from the outer surface thereof, and a pair of notches 73 and 75 are formed in this rim. One notch 73 is located on the front end side of the disk exchange slider 74, and the other notch 75 is located on the rear end side. These pair of notches 73,
75 is provided to detect the moving position of the disk replacement slider 74. Therefore, the moving path of the disk replacement slider 74 has a notch 73, as shown in FIG.
An optical sensor 77 for detecting 75 is arranged. The optical sensor 77 comprises a combination of a light emitting diode 79 and a phototransistor 81, and the light emitting diode 79 and the phototransistor 81 are attached to the cover 83 so as to sandwich the rim of the disk exchange slider 74 from above and below. . This cover 83
As is clearer with reference to FIG. 1, a part thereof has a shape covering a part of the movement path of the disk exchange slider 74, and is fixed to the side surface of the main chassis 2.

A pair of pinions 84 and 86 are arranged at the center of the side edge of the main chassis 2 on the side of the disk exchanging slider 74, and these pinions 84 and 8 are arranged.
Reference numeral 6 projects upward. Pinion 84,86
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 arranged apart from each other along the side edge of the main chassis 2. The pair of pinions 84 and 86 are connected to the loading motor 88 via a gear train (not shown),
It receives the power from the motor 88 and can rotate forward and backward in the same direction. The loading motor 88 is attached to the lower surface side of the main chassis 2.

When the disc exchange slider 74 is in the storage position on the side of the disc stocker 6 as shown in FIG. 2, the rack 80 of the disc exchange slider 74 engages only with the pinion 86, while the rack 82 of the disc pallet 58 does not. It does not engage with any of the pinions 84 and 86. In such a state, when the pair of pinions 84 and 86 are rotated in one direction by the loading motor 88, the disk exchange slider 74 and the rack 80 and the pinion 8 are moved.
Disc pallet 5 from the storage position by the engagement of 6
8 slides on the guide rail 72 toward the front side, and in this process, the rack 80 also meshes with the other pinion 84.

When the disk exchange slider 74 reaches the front end of the guide rail 72 and the notch 73 is detected by the optical sensor 77, the loading motor 88 is loaded.
Is stopped, and the disk exchange slider 74 is positioned at the side of the mounting recess 60 of the disk pallet 58, that is, at the loading position. When the loading motor 88 is further driven in the same direction, the disk replacement slider 74
From the loading position to the disk pallet 58
Slide to the side and contact the front edge of the disc pallet 58,
The disk pallet 58 is pulled out from the home position on the main chassis 2. By this withdrawal, the rack 82 of the disk pallet 58 sequentially meshes with the pinions 86, 86, so that the withdrawal is continued.

When the disc pallet 58 is pulled out to the front side of the disc drive device by a predetermined length, the driving of the loading motor 88 is stopped. At this time, the rack 82 of the disc pallet 58 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, The CD can be taken out from the disc 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 to the storage position. . When the notch 75 of the disc exchange slider 74 is detected by the optical sensor 77, the driving of the loading motor 88 is stopped and the disc exchange slider 74 is positioned at the storage position on the disc stocker 6 side.

Therefore, the disc replacement slider 74 is rotated in the forward and reverse directions of the loading motor 88, whereby the storage position on the disc stocker 6 side and the disc pallet 58.
Can be reciprocated to and from the loading position on the mounting recess 60 side. If one selected storage stage of the disc stocker 6 is positioned at the same level with respect to the disc pallet 58, the disc exchange slider 7
By the reciprocating motion of 4, the CD can be exchanged between the disc pallet 58 and the selective storage stage of the disc stocker 6.

Explaining in detail about the exchange of the CD, FIG. 5 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 the storage position toward the loading position, the taper portion of one pusher 78 abuts against the peripheral edge of the CD and lifts the peripheral edge of the CD.
Is extruded from the disc stocker 6 and transferred onto the disc pallet 58 as shown in FIG.

Here, as is clear from FIG. 6, 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. When the CD is pushed out of the disc stocker 6, the CD is immediately guided to the straight guide surface 90 which is continuous with the mounting concave portion 60 of the disc pallet 58 at the peripheral edge on the side opposite to the disc exchange slider 74.
As a result, the CD can be transferred smoothly and stably. The disk replacement slider 74 shown in FIG.
Is slightly returned from the loading position to the storage position side, whereby the pair of pushers 76, 78 of the disc exchange slider 74 are separated from the transferred CD. That is, when the notch 73 of the disk exchange slider 74 is detected by the optical sensor 77 at the loading position, the loading motor 88 reversely rotates by a predetermined amount, and then the drive thereof is stopped.

From the state shown in FIG. 6, the disk replacement slider 74
When the disk slides toward the storage position, in this case, the other pusher 76 of the disk exchanging slider 74 causes the CD on the disk pallet 5 to move in the same manner as the disk stocker 6 does.
Push it back toward and store it in the empty selection storage tier. When the notch 75 of the disk exchange slider 74 is detected by the optical sensor 77 at the storage position, the loading motor 8
8 is reversely rotated by a predetermined amount, and then its driving is stopped.
Therefore, even in the case of FIG.
Is slightly returned from the storage position to the loading position side, and the pair of pushers 76 and 78 of the disc exchange slider 74 are separated from the CD on the selected storage stage.

As is apparent from the above description, the disc stocker 6 must be able to move up and down in order to exchange the CD between the disc pallet 58 and the CD in any storage stage of the disc stocker 6. . For this reason, the disc stocker 6 has a lift table 9 as shown in FIG.
The elevator base 92 is supported by the sub-chassis 4 via a pair of pantograph mechanisms 94 at both front and rear ends thereof.

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 meshed with a pair of racks 100 standing upright from the sub chassis 4. The pair of racks 100 are obtained by cutting and raising from the sub chassis 4.

On the other hand, as shown in FIG. 8, the lifting table 92 is located at the inner side of the side edge opposite to the horizontal shaft 96,
A nut 102 is fixed, and a hollow feed screw 104 is vertically penetrated and screwed into the nut 102. A post 106 standing upright from the sub chassis 4 is inserted into the feed screw 104, and the post 106 projects 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, and this gear 11
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 the motor base and has an output shaft protruding below the motor base.
A small-diameter gear 116 is attached to this output shaft,
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 near the clutch gear 118, that is, near the feed screw 104 described above, and integrally includes large and small gears.
A step gear 124 is provided. The two-stage gear 124 is also rotatably attached to a support shaft 123 erected from the sub chassis 4, and the upper end of the support shaft 123 is supported by the motor base. Small gear 1 of the two-stage gear 124
24S is meshed with the gear 110 of the feed screw 104 via intermediate gears 126, 128 and 130. The intermediate gears 126, 128, 130 are also
It is rotatably attached to a support shaft erected from the sub chassis 4.

In the state shown in FIG. 8, the small gear 118S of the clutch gear 118 and the large gear 124L of the two-stage gear 124 are disengaged from each other.
The engagement of the clutch actuator 13 shown in FIG.
It is possible to connect and disconnect by 2. 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. The seesaw lever 134 usually has a clutch gear 118 at one end.
Is located below the small gear 118S and is in contact with the sub chassis 4 by its own weight. Although not shown, one end of the seesaw lever 134 has a clutch gear 118.
It has a bifurcated shape that sandwiches the support shaft 120.

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 of the feed screw 104, whereby the selected storage stage of the disk stocker 6 (one storage rack or its lower plate). Will be positioned at the same 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 gears 118S and 2 of the clutch gear 118 are separated from each other.
The meshing of the step gear 124 with the large gear 124L is released.

Referring to FIG. 8, in the vicinity of the clutch gear 118, another two gears are provided on the opposite side of the two-stage gear 124.
The stage gear 140 is arranged. The two-stage gear 140 is also rotatably attached to the support shaft 139 erected from the sub chassis 4 with the large gear 140L facing downward, and the upper end of the support shaft 139 is supported by the motor base of the common motor 114. ing.

When the clutch gear 118 is in the lowered position, the large gear 140L of the two-stage gear 140 is the clutch gear 1
18 meshes with the 18 small gear 118S, but when the clutch gear 118 is raised by the clutch actuator 132, the small gear 118S of the clutch gear 118 separates from the large gear 140L of the two-step gear 140, and as described above,
It meshes with the large gear 124L of the step gear 124.

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. 4, the cylindrical cam 142 is arranged close to the end of the disc reproducing unit 20 opposite to the self-hinge 24, and the disc reproducing unit 20, that is, its unit frame. A pin-shaped cam follower 148 protruding from the other end of 22 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 meshing with the large gear 140L of the stepped gear 140,
When the common motor 114 is rotated, 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, which rotates the cylindrical cam 142.

The rotation of the cylindrical cam 142 is caused by the cam groove 146.
Along the track, the cam follower 14 of the disc playback unit 20
8 is moved up, the disc reproducing unit 20 is rotated from the retracted position below the disc pallet 58 to the upper clamp position around the pair of self hinges 24, and the pickup 38 and the turntable 4 are rotated.
0 rises to the position shown by the chain double-dashed line in FIG. On this occasion,
The turntable 40 projects above the disc pallet 58 through its 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 placed, the CD is received on the turntable 40 by the upward rotation of the disc reproducing unit 20, and at the same time, the hub of the turntable 40 is fitted into the center hole of the CD. In addition, turntable 4
When 0 is raised, the CD is clamped by the magnetic attraction force acting between the turntable 40 and the clamper 56.

The above-described two-stage gear 140 and the cylindrical cam 142
The cam follower 148 cooperates with the clamper 56 to form C.
The power transmission system of the clamping means for clamping D is configured, and the two-stage gear 140 and the gear 144 of the cylindrical cam 142 are the clamp side gear train 143. The CD which is floated from the disc pallet 58 and clamped on the turntable 40 is rotated together with the turntable 40, and the information recorded on the CD is reproduced by the pickup 38.

In the case of this embodiment, as shown in FIG. 8, a power distribution lever 150 made of synthetic resin is rotatably attached to the support shaft 123 of the aforementioned two-stage gear 124. The power distribution lever 150 is arranged on the sub chassis 4. As is apparent from FIG. 10, the portion on the one end side of the power distribution lever 150 is along the side edge of the sub-chassis 4 and extends from the support shaft 123 to the cylindrical cam 142 described above.
Gear 144 of this cylindrical cam 142 after extending toward
It is bent so as to sneak in below. This bent portion is formed as a spring piece 154 having a flexible portion 152 at its base, and this spring piece 154 has its flexible portion 152.
It is elastically deformable inward from the sub chassis 4.

On the other hand, the portion on the other end side of the power distribution lever 150 extends inward of the sub chassis 4, and a tension coil spring 156 is stretched between the tip of the sub chassis 4 and the sub chassis 4. The tension coil spring 156 urges the power transmission lever 150 clockwise as seen in FIG.
Here, the spring constant of the tension coil spring 156 is set sufficiently smaller than the spring constant of the spring piece 154.

A distribution gear 158 is rotatably attached to the power distribution lever 150 at a side edge portion on the clutch gear 118 side. The distribution gear 158 is the large gear 124L of the two-stage gear 124. Have been meshed with. As is apparent from FIG. 8, the distribution gear 158 has two
Although it has a tooth width ranging from the large gear 124L of the step gear 124 to the small gear 118S of the clutch gear 118 in the lowered position, in the state shown in the drawing, the distribution gear 158 meshes with the small gear 118S of the clutch gear 118. However, a predetermined gap is secured between the distribution gear 158 and the small gear 118S as shown in FIG.

On the other hand, the engaging pin 160 projects toward the sub chassis 4 from the lower surface of the cylindrical cam 142, that is, the lower surface of the gear 144, and the engaging pin 160 is positioned at the peripheral portion of the power gear 144. ing. In the state shown in FIG. 10, the engagement pin 160 is arranged at a position separated from the spring piece 154 of the power transmission lever 150 in the circumferential direction of the cylindrical cam 142.

Next, in FIG. 11, a series of routines from the loading of the CD from the disc stocker 6 onto the disc pallet 58 to the clamping of the CD on the turntable 40, that is, loading / unloading of the CD A reproduction preparation routine is shown, and this routine will be described below with reference to FIG. "Loading / Playback Preparation Routine" First, when the selection command of the CD to be played back is output and the determination result in step S1 becomes true (Yes), the clutch actuator 132
Of the electromagnet 138 is excited (step S2), the clutch actuator 132 is turned on, and the clutch gear 1
The eighteen small gears 118S are meshed with the large gears 124L of the two-stage gears 124 of the up-and-down gear train 112. Therefore, in this case, the motive power of the common motor 114 is the lifting side gear train 112.
Can be transmitted to. If the determination result of step S1 is false (No), the subsequent steps are not executed and this routine is ended.

Thereafter, the shared motor 114 is driven to move the disc stocker 6 up and down, so that the selected CD storage stage,
That is, the selected storage stage is positioned at the same level as the disc pallet 58 (step S3). Then, the electromagnet 138 of the clutch actuator 132 is demagnetized (step S4), and the clutch actuator 132 is turned off. In this case, the small gear 118S of the clutch gear 118 moves from the second stage gear 124 of the ascending / descending side gear train 12 to the clutch side. The second gear 140 of the gear train, that is, the large gear 1
The power of the common motor 114 can be transmitted to the clutch side gear train by being meshed with 40L.

As described above, when the selected storage stage of the disc stocker 6 is positioned at the same level as the disc pallet 58, the loading motor 88 is driven and the disc replacement slider 74 moves from the storage position of FIG. 5 to the loading position of FIG. And moves the selected CD to the loading position on the disc pallet 58 (step S5).

After that, when the common motor 114 is driven, its power is transmitted through the clutch-side gear train to the cylindrical cam 14.
2, the disc reproducing unit 120 rotates upward due to the action of the cam groove 146 and the cam follower 148 with the rotation of the cylindrical cam 142. As a result, as described above, the CD on the disc pallet 58 is rotated. Is clamped on the turntable 140 of the disc reproducing unit 120 in a state of being levitated from the disc pallet 58 (step S6), and the CD loading / playback preparation is completed.

Here, when the rotation of the cylindrical cam 142 reaches a predetermined rotation angle in the above-mentioned CD reproduction preparation process, that is, the clamping process, the gear 1 of the cylindrical cam 142 is rotated.
When the engagement pin 160 protruding downward from 44 abuts on the spring piece 154 of the power distribution lever 150, and when the cylindrical cam 142 further rotates, the engagement pin 160 pulls the power distribution lever 150 and the coil spring 156. Rotate against the pulling force of. That is, as described above, the spring piece 1
Since 54 has a spring constant larger than that of the tension coil spring 156, the engagement pin 160 is attached to the spring piece 154.
When is pressed, the power distribution lever 150 rotates around the support shaft 123 of the two-stage gear 124 in the direction of the arrow in FIG.

When the power distribution lever 150 is rotated in this way, the distribution gear 158 moves while meshing on the large gear 124L of the two-stage gear 124, and then, as shown in FIG.
As shown in FIG. 2, the small gear 118 of the clutch gear 118
It also meshes with S, and at the time of this meshing, the rotation of the power distribution lever 150 stops. After that, when the cylindrical cam 142 is further rotated to the maximum rotation angle, the engagement pin 16
0 proceeds while elastically deforming the spring piece 154 of the power distribution lever 150 from the state of the two-dot chain line to the state of the solid line as shown in FIG. 13. Therefore, the distribution gear 158 of the power distribution lever 150 is The large gear 124L and the small gear 118S of the clutch gear 118 are maintained in mesh with each other.

On the other hand, in accordance with the rotation of the cylindrical cam 142, the disc reproducing unit 120 rotates upward from the retracted position indicated by the solid line in FIG. 14 to the clamp position indicated by the two-dot chain line through the position immediately before the one-dot chain line clamp. Here, when the disc reproducing unit 120 reaches the position immediately before the one-dot chain line clamp, the distribution gear 158 of the power distribution lever 150 meshes with the small gear 118S of the clutch gear 118 as shown in FIG.

Therefore, while the disc reproducing unit 120 is rising from the position immediately before the one-dot chain line clamp in FIG. 14 to the two-dot chain line clamp position, that is, at the end of the CD clamping operation, the small gear 118 of the clutch gear 118.
S is engaged not only with the two-stage gear 140 of the clamp side gear train 143 but also with the two-stage gear 124 of the elevating side gear train 112, that is, the large gear 124L thereof via the distribution gear 158. As a result, the power from the shared motor 114 is transmitted not only through the cylindrical cam 142 but also through the up-and-down side gear train 112.
It is transmitted to the feed screw 104 of the lifting table 92, and the disc stocker 6 is raised by a predetermined height.

Referring to FIG. 15, the disk stocker 6
The two-dot chain line CD loaded on the disc pallet 58 from the above moves to the solid line clamp position by the rise of the disc reproducing unit 120, and the disc stocker 6 also changes from the two-dot chain line position to the solid line position. The elevated state is shown. Here, in FIG. 15, H1
Indicates the height of the clamp position above the disc pallet 58, and the amount of rise of the disc stocker 6 is H.
Shown in 2. The rise H2 of the disk stocker 6 is
The height can be arbitrarily set within the range in which the height H1 is added to the storage pitch of the CDs on the disk stocker 6 side.

The CD loaded as described above is floated from the disc pallet 58 by the clamping operation, whereby the CD at the clamp position, that is, the reproducing position and the selective storage stage on the side of the disc stocker 6 are positioned next to each other. Even if the distance between the target CD on the extremely high storage tray becomes small, the disc stocker 6 also rises at this time, so increase the distance between the CD at the playback position and the target CD. You can

As a result, the thickness of the CD at the reproducing position and the target CD, and the warp thereof are larger than the standard value, and in addition, the sagging of the target CD due to the molding accuracy and the assembling accuracy on the disc stocker 6 side is added. However, in the overlapping area between the CD at the reproduction position and the target CD, a sufficient space between them can be secured, and it is possible to reliably prevent the CD at the reproduction position from coming into contact with the target CD, thus ensuring stable reproduction of the CD. It can be carried out.

Conventionally, when the CD is clamped, the C
Since D floats from the disc pallet 58, a large CD storage pitch is secured on the side of the disc stocker 6, but in the case of this embodiment, the disc stocker 6 itself is raised in conjunction with the CD clamping operation. Since the space between the reproduction position CD and the target CD on the disc stocker 6 side is secured, the CD storage pitch on the disc stocker 6 side can be shortened, and the disc stocker 6 can be made thinner. It can be further aimed.

When the reproduction of the CD is completed, the shared motor 11
4, the cylindrical cam 142 is rotated in the opposite direction, and the disc reproducing unit 120 is rotated downward, whereby the CD at the reproducing position is returned from the turntable 40 onto the disc pallet 58. At this time, the cylindrical cam 1
While the engaging pin 160 of 42 returns from the position of FIG. 13 to the position of FIG. 12, the power distribution lever 150 has its spring piece 154.
Is only returned to its original state by the elastic return force, and does not rotate. Therefore, also in this case, since the distribution gear 158 of the power distribution lever 150 is in the state of meshing with both the clutch gear 118 and the two-stage gear 124 of the up-and-down gear train 112, the disc stocker 6 descends by the amount corresponding to its ascent. , The selected storage stage of the disc stocker 6 is returned to the same level as the disc pallet 58.

The present invention is not limited to the above-described embodiment, but various modifications can be made. For example, in one embodiment, the disc stocker 6 is raised in conjunction with the CD clamping operation, but in a modified example, the disc stocker 6 can be raised before the CD clamping operation. In this case, as shown in FIG. 16, the above-mentioned optical sensor 77 is connected to the controller 162, and this controller 162 controls the shared motor 114 and the electromagnet 138 of the clutch actuator 132 based on the detection signal from the optical sensor 77. To do.

More specifically, FIG. 17 shows a CD loading / playback preparation routine executed by the controller 162. In FIG. 17, the same steps as those described above are referred to by the same steps. The reference numerals are given and the description thereof is omitted. In this routine, when step S3 is executed, then step S5 is executed instead of step S4, and the disk stocker 6 to the disk pallet 5 are executed.
The loading of the selected CD on 8 is performed. During this loading, the electromagnet 138 remains excited, that is, the clutch actuator 132 remains on, and the small gear 118S of the clutch gear 118 meshes with the large gear 124L of the two-stage gear 124 of the ascending / descending side gear train 112. Maintained in a state.

In the next step S7, the controller 16
2 determines whether or not the selected CD has reached the loading position based on the detection signal from the optical sensor 77. If the determination result is true, the shared motor 114 is driven,
The disk stocker 6 is lifted by the lift amount H2 (step S8). If the determination result of step S7 is false, this step is repeatedly executed until the determination result becomes true.

Thereafter, steps S4 and S6 are sequentially executed, and the CD on the disc pallet 58 is clamped as described above. In the case of this modification, when the CD is in the loading position, that is, on the disc pallet 58, as shown by the solid line in FIG.
It is positioned in advance at the position indicated by the solid line, which is raised by the amount of rise H2 from the position indicated by the dashed line. After that, the CD is clamped by the height H1 from the disc pallet 58 by the clamping operation, that is, even if the CD is positioned at the reproducing position, the CD at the reproducing position and the target CD on the disc stocker 6 side are separated from each other. A sufficient space is secured between them as in the case of the above-described embodiment. Therefore, even in the case of the modified example, the same effect as that of the embodiment is exhibited.

In one embodiment, the disk stocker 6
The single shared motor 114 is used for raising and lowering the disc and rotating the disc reproducing unit 120. However, it is also possible to perform them by separate motors. In this case, whether the CD has been transferred onto the disc pallet 58 or not. Or after this,
After the CD is clamped, the lifting / lowering motor on the disc stocker 6 side is controlled to move the disc stocker 6 to the height H.
You only need to raise it by 2.

Further, in detecting the position of the disk exchange slider 74, an electric sensor such as a micro switch may be used instead of the optical sensor.

[0079]

As described above, according to the disk drive apparatus of the present invention, when a disk is supplied from the disk stocker to the receiving stage side, the disk stocker is further raised by a predetermined height. Even if the CD on the receiving stage is lifted and clamped from the receiving stage by the clamping means, the disc in the clamp position and the storage disc at the next higher level on the disc stocker side are moved in the vertical direction. Enough space can be secured. Therefore, it is possible to reliably prevent the disc at the clamp position from coming into contact with the storage disc on the disc stocker side, and it is possible to perform stable CD reproduction. Further, in this case, since the storage pitch of the storage discs on the disc stocker side can be made small, there is an advantage that the disc stocker can be made thinner and the entire device can be made smaller.

[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 sectional view of a disc stocker.

FIG. 4 is a front view of a disc reproducing unit.

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

FIG. 6 is a plan view of the disk drive device with the disk exchange slider in the loading position.

FIG. 7 is a diagram showing an optical sensor for detecting the position of a disk exchange slider.

FIG. 8 is a side view showing an elevating side gear train and a clamp side gear train extending from a clutch gear on the shared motor side.

9 is a front view of a clutch actuator that operates a clutch gear of the power transmission system of FIG.

10 is a plan view schematically showing the ascending / descending side gear train and the clamp side gear train of FIG.

FIG. 11 is a flowchart showing a CD loading / playback preparation routine.

12] The power distribution lever rotates from the state of FIG.
FIG. 6 is a plan view of a gear train showing a state in which the distribution gear meshes with both the lifting-side gear train and the clamp-side gear train.

13 is a plan view of the gear train showing a state where the spring pieces of the power transmission lever are elastically deformed from the state of FIG.

FIG. 14 is a diagram showing a state in which the disc reproducing unit is rotated upward from the retracted position toward the clamp position.

FIG. 15 is a diagram showing a positional relationship between a reproduction CD and a storage CD on the disc stocker side during reproduction.

FIG. 16 is a block diagram for controlling a clutch actuator and a shared motor by a detection signal of an optical sensor.

FIG. 17 is a flowchart showing a CD loading / playback preparation routine executed by the controller of FIG. 16;

FIG. 18 is a diagram showing a positional relationship between the CD on the disc pallet and the storage disc on the disc stocker side when the CD is loaded.

[Explanation of symbols]

 6 Disc Stocker 8 Lower Plate (Storage Stage) 14 Storage Shelf (Storage Stage) 20 Disc Playback Unit 56 Clamper 58 Disc Pallet (Reception Stage) 74 Disc Replacement Slider 112 Elevating Side Gear Train (Elevating Means) 114 Shared Motor 118 Clutch Gear 124 Two-stage gear 142 Cylindrical cam (clamping means) 143 Clamp side gear train 148 Cam follower 150 Power distribution lever 158 Distribution gear 160 Engagement pin

Claims (4)

[Claims] 1. A disk stocker (6) which has a plurality of storage stages, mounts the discs on each storage stage with a predetermined pitch in the vertical direction, and allows the discs on each storage stage to be pulled out and stored. ), And a receiving stage (58) which is provided on the disc drawer side with respect to the disc stocker and receives the discs in a state where they partially overlap with each other on the disc stocker side storage disc in the vertical direction. (1) lifting and lowering means to position the selected storage stage of the disc stocker at the same level with respect to the receiving stage, and a disc transfer for delivering the disc between the receiving stage and the selected storage stage Means (74) for turning the disc on the receiving stage into a turntable (4
0) and clamp means (142) for raising and clamping within the range of the pitch to rotate together with the turntable, and when the disc is supplied to the receiving stage side, through the elevating means. Lift means (77, 114, 15) for raising the disc stocker by a predetermined height.
8) A disk drive device comprising: 2. The elevating means and the clamping means are
A common motor (114), a lifting gear train (112) that receives power from the motor, and a clamp gear train (1
43) and a clutch gear (11) that meshes with one of the ascending / descending side and clamp side gear trains and is rotated by the motor to transmit the power of the motor to the one gear train.
8), the lift means is configured to operate at the final stage of the operation of the clamp means when the clutch gear and the clamp side gear train are in the connected state via the clutch gear and the clamp means is operating. 2. The disk drive device according to claim 1, further comprising a distribution gear (158) that meshes with both the clutch gear and the elevating side gear train and distributes the power of the motor to the elevating side gear train. 3. The lift means includes a power distribution lever (150) that rotates in conjunction with the clamp means at the end of the operation of the clamp means, and the power distribution lever is attached with the distribution gear. 3. The method according to claim 2,
Disk drive. 4. The disc transfer means reciprocates laterally between the disc stocker and the receiving stage between the disc stocker and the receiving stage, and selects the selection when moving from the disc stocker side to the receiving stage. A disc exchange slider that pushes the storage disc on the storage stage onto the receiving stage, and, conversely, when moving from the receiving stage toward the disc stocker, pushes the disc on the receiving stage back to the empty selected storage stage for storage (74), and the lift means is provided with a detector (77) that outputs a detection signal when the disc exchange slider is at the disc loading position on the receiving stage side, and detects the detection signal from this detector. The device according to claim 1, wherein the elevating means is activated when received. Disk drive.