JPH0438663A - Stocker elevating device for changer system disk player - Google Patents

Abstract

PURPOSE:To form a stocker elevating device with approximate outside diameter dimensions of a stocker by inserting a screw rod, which is rotated and driven by a driving source, through center holes of disks housed in the stocker. CONSTITUTION:A gear 94 rotated and driven by a motor 93 is arranged on a chassis bottom plate, and a screw rod 95 rotated as one body is attached on the same axis. Meanwhile, a nut 96 to be engaged with the screw rod 95 is attached to the bottom of a stocker 90 so that it has the same axis as center holes of disks on a carriage housed in the stocker 90. The screw rod 95 is designed with a slightly small diameter so that it can be inserted through center holes of disks. thus, the stocker elevating device is formed with the out-side diameter dimensions of the stocker 90.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to the configuration of a stocker lifting device used in a disc player having a so-called changer function that can selectively play a plurality of discs.

<Prior Art> So-called changer-type compact disc players that can store a plurality of discs and play any one of them have become popular. For example, a changer-type disc player is known, which is configured to be able to store a plurality of discs in a stocker, pull out any one of the discs stored in the stocker to a playable position, and play it by a disc playback means. It is.

In this case, in order to pull out a disc stored in a certain storage stage in the stocker and move it to a playable position, or to store a disc in a playable position in a desired storage stage in the stocker, the stocker and the disc playback Is it necessary to be able to move up and down relative to the means?

Japanese Unexamined Patent Publication No. 1-124154 discloses a mechanism for raising and lowering a disc reproducing mechanism relative to a stocker. In this elevating mechanism, a drive gear 6 is provided on the chassis 4, and is screwed onto the circumferential surface of the drive gear 6 and engaged with a driven mechanism 7J7.7 provided on the disc playback mechanism 3. Cylindrical cams 5, 5.5 are provided for driving the cams up and down.

<Problems to be Solved by the Invention> In the lifting device according to the above-mentioned prior art, the cylindrical cam 5°5.5 and the driven units 7, 7.7 must be arranged on both sides of the disc playback mechanism 3, so the width of the device is limited. must be larger than the width of the stocker. Therefore, it has been difficult to achieve miniaturization of the entire disc player. Furthermore, when the stocker and the disk reproducing means are moved up and down relative to each other, if the stocker is fixed and the disk reproducing means is moved up and down, there is a risk that mechanically unavoidable play may adversely affect accurate signal reading. I don't like it because it is.

<Means for Solving the Problems> The present invention aims to solve the above-mentioned problems, and is configured so that a plurality of discs can be stored in a stocker, and can play any one of the discs stored in the stocker. In a changer type disc player configured to be pulled out to a position and played by a disc playing means,
A gear rotationally driven by a drive source, a threaded rod fixed coaxially with the gear and rotating on the body and having a smaller diameter than the center hole of the disk, and a threaded rod coaxially with the center hole of the disk stored in the stocker. The stocker elevating device is characterized in that it has a nut attached to the stocker and screwed into the threaded rod, and the threaded rod can be inserted through the center hole of the disk housed in the stocker.

action> A threaded rod that is rotated and fixed to a stocker)
The stocker is moved up and down through screw engagement with the stocker. Since the threaded rod has a smaller diameter than the center hole of the disk stored in the stocker, it can be inserted into the center hole of the disk when the stocker is moved up and down.

<Example> The present invention will be described in detail below based on illustrated embodiments.

In this embodiment, a tray that can be pulled out and stored in the player body is provided with a carriage on which a disc can be placed and that can be moved in the direction of withdrawal and storage with respect to the tray, and further, a carriage is provided inside the player. This is a stocker-type disc player configured by arranging a stocker that can store a plurality of carriages (seven in the illustrated example) and that can be moved up and down. With this configuration, a so-called changer function is realized, which enables playback of a disc placed on a selected carriage from a plurality of carriages stored in the stocker, and also allows playback of a normal single-disc CD. Discs can be loaded/unloaded using the tray in the same way as the player. The basic structure of such a stocker type disc player is described in Japanese Patent Application No. 1-219071, which is the applicant's earlier application.

There is a tray 3 on the side plate 2 of the player body.
A shaft 9 extending along the drawer/storage direction of the tray 30 is fixed, and the tray 30 is opened by passing the shaft 9 through a guide member 31 fixed to one side thereof.
It is supported so as to be movable in the drawer/storage direction. On the other hand, a guide rail 22 is fixed to the other end of the tray 30 and extends along the drawer/storage direction, and the guide rail 22 is connected to a guide piece 14 fixed to the bottom plate 4 of the chassis
is guided so as to be movable relative to the chassis l in its drawer/storage direction. Therefore, the tray 30 is
It is possible to move forward in the drawer/storage direction between the eject position, which protrudes forward from the player body and allows the disc to be placed, and the loading position, which is stored inside the chassis 1 (player body) and allows the disc to be played. It is said that Particularly with reference to FIGS. 8a to 8C, a first arm 15 is integrally formed on the upper end of the guide piece 14 on the pullout direction side, and extends along the drawer/storage direction and has a tip on the pullout direction side. On the other hand, second arms 16 are integrally formed on the storage direction side, each having a length longer than the first arm 15 by a predetermined dimension and having a tip on the storage direction side.

Upper guide rollers 17 and 18 positioned so as to be in sliding contact with the upper surface of the lower end portion 23 of the guide rail 22 are rotatably supported at the tip of each arm.

Further, lower guide rollers 20 and 21 positioned so as to be in sliding contact with the lower surface side of the lower end portion 23 of the guide rail 22 are rotatably supported on the guide piece 14 at a substantially lower position of these upper guide rollers 17 and 18, and further downward. The guide pieces 14 located above the guide rollers 20 and 21 are each integrally formed with seven flanges 27 and 28 that can come into contact with the upper surface side of the lower end portion 23. 1- This is because the clamping force between the upper guide rollers 17 and 18 and the lower guide rail 22 is set stronger on the first arm 15 side (the pull-out direction side).
It is possible to more effectively remove the looseness of the relay 30.

That is, play in the tray 30 is particularly problematic at the eject position, and therefore it is necessary to actively remove play at the eject position.

FIG. 8e shows the positional relationship between the guide rail 22 and the guide piece 14 at the eject position of the tray 30. In this state, for example, when the operator
When the end 22a) of the guide rail 22 on the pull-out direction side is grasped by hand and displaced in the direction A in the figure, the guide rail 2
2 is a contact portion P1 between the lower end portion 23 and the lower guide roller 21;
When it is rotated in the entry direction centering on , and conversely displaced in the direction B in the drawing, it is rotated in the direction B centering around the contact portion P2 between the lower end portion 23 and the lower guide roller 20 . Therefore, when rotating in the input direction, the distance from the contact portion P1 as a rotation fulcrum to the end portion 22a as a point of action is the same as the distance from the contact portion P2 to the guide rollers 20, 21 when rotating in the B direction. The interval between the guide pieces 14 is set to be slightly larger than the thickness of the guide rail 22 in the normal state, while the interval between the lower guide rollers 20, 21 and the 7 langes 27 and 28 is set to be slightly larger than the thickness of the guide rail 22. The size is set to large. As a result, the lower end portion 23 of the guide rail 22 is placed in the first position. Due to the deflection of the second arm 15.16, it is held in pressure contact between the upper and lower guide rollers (Fig. 8d), and is loosely fitted between the lower guide roller 20.21 and the 7-lunge 27.28. .

Therefore, the backlash of the tray 30 is prevented by the pressure-contact and clamping action, and the upper surface side of the lower end portion 23 of the guide rail 22 is connected to the 7 flange 27 in the drawing direction (FIG. 8e).
On the other hand, in the direction B (FIG. 8e), the range is limited to a state where the flange 28 comes into contact with the flange 28.

Further, in this embodiment, as described above, the first arm 15 is formed shorter than the second arm 16 by a predetermined dimension,
The distance between the upper and lower guide rollers to the end 22a is larger than the distance between the upper and lower guide rollers. It is necessary to make the regulating force during rotation stronger than in the B direction.

On the other hand, when the guide rail 22 rotates in the direction A in the figure, the pressing force of the upper roller 17 mainly due to the deflection of the first arm 15 acts as a displacement regulating force, and conversely, when the guide rail 22 rotates in the direction B in the figure, the pressure contact force of the upper roller 17 acts as a displacement regulating force. At times, the pressing force of the upper roller 18 mainly due to the deflection of the second arm 16 acts as a displacement regulating force.

Therefore, in this embodiment, the first arm 15 and the second arm 16 are configured as described above, and the first arm 15
The pressing force of the guide rail 22 on the side is applied to the second arm 1.
By setting the rigidity to be stronger than the side 6, not only can the rigidity of the tray 30 against backlash be sufficiently increased, but also it can be made equal across the directions A and B in the drawing.

In the embodiment described above, the first arm 15 and the second arm 16 are configured as described above so that the rigidity of the tray 30 is made equal regardless of its directionality (directions A and B in the figure). The pressure and clamping force of the guide rail 22 as a whole of the guide piece 14 is set to be relatively large. For this reason, when the tray 30 is moved by being guided by the guide rail 22 or the guide piece 14, it is considered that the load applied to the tray drive system, which will be described later, becomes relatively large. Therefore, when reducing the load on the tray drive system as a priority, the length of the first arm I5 may be made equal to the length of the second arm 16, and the pressure and clamping force may be set to be relatively small. good. Note that even in this case, the guide piece 14 prevents the tray 30 from wobbling. Thus, the tray 30 is movable in the drawer/storage direction with respect to the chassis I with the guide rail 22 being held in pressure contact between the upper guide roller 17.18 and the lower guide roller 20.21 of the guide piece 14.

As described above, the tray 30 is movable in the pull-out/storage direction between the loading position and the ejecting position, and the recessed groove 52 is formed to take these loading positions. Configured to be moved. The horizontal rail 25 is the side plate 2
It extends horizontally over almost its entire length along its inner surface (Fig. 9b).

A tray lock arm 70 and a carriage lock arm 80 are each pivotally supported on a pivot pin 56 that passes through the vertical portion 54 of the shuttle 50. The tray lock arm 70 has a lock pin 32 that protrudes outward from the side surface of the tray 30.
A locking groove 72 capable of locking is formed, and a kite pin 74 is formed to be engaged with a guide groove 26 formed on the upper inner surface side of the guide rail 24. The kite grooves 26 extend along the inner surface of the side plate 2 along substantially the entire length thereof, or
A first horizontal portion 26a extending horizontally in the drawer/storage direction of the tray 30 at the front thereof, and a second horizontal portion 26c horizontally extending at a level slightly lower than the first horizontal portion 26a at the rear thereof; (The carriage 40 is always placed thereon during movement to and from the first eject position.On the other hand, the carriage 40 is mounted together with the tray 30. It is provided so as to be movable relative to the tray 30 so as to move further away from the tray 30 at the loading position and move further into the back to be stored in the stocker 90.
A shuttle 50 that moves in the drawer/retractor direction of the tray 30 by a wire 60 is used as a driving means.

Referring particularly to FIGS. 9A to 9C, the wire 60 is wound between a drive pulley 61 and a driven pulley 62 on the side plate 2 side of the chassis I.

The drive pulley 61 is rotatably driven at an arbitrary speed by a motor 63 that is pivotally supported by the side plate 2 and connected to a drive circuit 631 via a gear device 64. The yarn kettle 50 is fixed to both ends of the wire 60. A side plate 2 is provided on the outer surface of the shuttle 50.
The tray 3 is formed by bending the lower ends of the guide 1ζ rails 24 fixedly attached to the inner surface of the tray 1 along substantially the entire length thereof.
9 b) which receives a horizontal rail 25 extending along the drawer/storage direction of 0.

Before explaining the carriage lock arm 80, please refer to FIGS. 12a to 12C and FIGS. 1a to 1d for the structure of the carriage 40 itself and the structure of the tray 30 that is related to the carriage 40. As I explain,
A disk mounting portion 41 for placing a disk is formed on the upper surface of the carriage, and projections 42a to 42d are provided to regulate the position of the disk placed on the disk placement portion.
is formed. On the other hand, when the carriage 40 is placed on the tray 30, an opening 302 having substantially the same shape as the disk placement section 41 is formed in the top plate 301 of the tray 30, which faces the disk placement section 42. In addition, the protrusions 42a to 4
A carriage 4 is provided on the lower surface side of the top plate 301 facing 2d.
0 moves forward with respect to the tray 30, the protrusions 42a to 42
Concave grooves 303a to 303d that allow movement of the tray 3
0 along the drawer/storage direction. A pair of protruding rails 43a, 4 are provided on both sides of the lower surface of the carriage.
3b; 43c, 43d are formed to extend along the drawer/storage direction, and when a plurality of carriages are stacked, each pair of protruding rails 43a and 43b on the lower surface of the upper carriage;
; Concave groove 43 formed between 43c and 43d] ;43
protrusions 42a and 42b on the upper surface of the lower carriage within 2;
42C and 42d are now accepted. Near the front end of the upper surface of the carriage 40 is a tray 30 top plate 301.
A pair of recesses 49a, 4 into which downwardly biased lock springs 39a, 39b attached near the front end of the lower surface side can be engaged.
9b is formed. In addition, the upper surface of the bottom plate 304 of the 1-ray 30 has the groove 4 formed on the lower surface of the carriage 40.
A pair of protruding rails 3 that can be fitted into and slidably connected to 31 and 432
5a and 35b are formed (FIG. 9a to FIG. 9C).

The carriage 40 in this example has a disk mounting section 41 formed at a level slightly lower than that of a 12crn disk mounting section 41a so that two types of disks of different sizes currently on the market can be mounted thereon. It consists of a 3cm disc mounting section 41b. In the 8 cm disk mounting portion 41b, the size of the through hole 48 in the drawer/storage direction is set smaller than the size of the recess 45 in the same direction,
Are both configured so that they can be engaged/disengaged?
In the loading position of the tray 30 shown in FIGS. 9a to 9c, the end 82 of the distal end 82
a is engaged with the wall portion 45a of the recess 45 on the pull-out direction side. Further, at the front end of the carriage lock arm 80, a guide pin 84 is formed to protrude inward and can be engaged with a guide groove 34 formed on the inner surface of the tray 30 so as to extend along the extending/retracting direction.

The tray 30 on which the carriage 40 is now placed is shown in FIG.
It is assumed that the loading position shown in FIG. 1C and FIGS. 9a to 9C is the position where the tray 30 is housed in the player body and the disc on the carriage 40 can be recorded and reproduced.

From this loading position, the disk placed on the carriage 40 is replaced with another disk, or a new disk to be played is placed or formed on the carriage 40 on which no disk is placed. A through hole 308 is formed in the bottom plate 304 facing this. 44
and 306 are openings formed in the carriage 40 and the tray bottom plate 304, respectively, in order to enable the optical reading mechanism of the playback reservoir to accelerate the disc placed on the disc mounting portion 41. A recess 45 is formed near the front end of one side of the carriage 40 into which a distal end 82 of a carriage lock arm 80 can fit.

In order to facilitate storage in a stocker 90, which will be described later, the front and rear ends of the carriage 40 are tapered. Further, a notch 46 is formed near the rear end of the carriage 40 and can be engaged with a spring 92, which will be described later.

Referring again to FIGS. 9a to 9C, the carriage lock arm 80 will be described. The carriage lock arm 80 is an elongated plate-shaped body that extends substantially the entire length of the tray 30. It rises from the front end and further bends inward to form a tip 82 that can fit into the recess 45 at the front end of the carriage 40 . Here,
When attempting to move the tray 30 together with the carriage 40 placed thereon to the eject position shown in FIG. The shuttle 50 is moved forward in the direction of the drive pulley 61. The carriage 40 is placed on the tray 30 while the shuttle 50 is horizontally moved to the frontmost position (eject position) by engagement between the groove 52 of the shuttle 50 and the horizontal rail 25 of the guide rail 24. In that state, remove the lock bin 32 and the tray.
The lock arm 70 is moved in the same direction by engagement with the locking groove 72. The movement of L-30 is shown in Figures 8a to 8.
As already mentioned in relation to Figure e, the guide rail 22 is held in pressure contact between the guide rollers 16, 20, 18, and 21 on the negative side, ensuring strict horizontal movement and effectively preventing wobbling. . While the tray 30 moves from the loading position to the eject position, the guide pin 74 protruding from the tray lock arm 70 is always fitted into the first horizontal portion 26a of the guide groove 26, so that the tray lock arm 70 The illustrated rotation angle is maintained, so that the lock pin 32 does not disengage from the locking groove 72, and the driving force accompanying the movement of the shuttle 50 can be effectively transmitted to the tray 30. Carriage 4
0, the lock springs 39a, 39b are in the recesses 49a, 49b.
By being inserted into the tray 30, it moves together with the tray 30.

At this time, the carriage lock arm 80 is also attached to the shuttle 5.
0, the carriage lock arm 80 is moved to the body with the tray 30 and the carriage 40, but during the movement and at the stop position (eject position), one side 82a of the distal end 82 of the carriage lock arm 80 engages with the wall 45a of the recess 45. It is kept in the same condition.

The movement of the tray 30 from the eject position to the loading position is simply carried out in the opposite direction in the same manner as described above, so a description thereof will be omitted. As shown in FIGS. 1a and 2a, a switch SW4 for detecting that the tray 30 has reached the loading position is located on the chassis l at a position corresponding to the end of the tray 30 in the pull-out direction. It is provided. The output of this switch sw4 is connected to a control circuit 6 (FIG. 19) which will be described later.

When attempting to store the disks on the carriage 40 placed on the tray 30 in the loading position into the empty space in the stocker 9o, the shuttle 50 is moved from the intermediate position (loading position) shown in FIG. 9 to the driven pulley 62.
Move horizontally in the direction of . When the shuttle 50 is moved slightly in the storage direction from the position shown in FIG. Accordingly, the tray lock arm 70 rotates about the pivot pin 56 in the counterclockwise direction shown in the figure. As a result, as shown in FIG. 14a, the lock pin 32 separates from the locking groove 72, and
The lock on tray 3o is released. Therefore, even if the shuttle 5o moves from the intermediate position in FIG. 9 to the right in the figure, the tray 30 remains at the loading position and the shuttle 5o
0 (the first
4b), only the carriage 40 is moved further to the right in the figure against the biasing force of the carriage regulating spring 39, and is stored in the empty space in the stocker 9o (the lowest stage in the illustrated example). Ru. Carriage lock arm 80
In this case, the guide pin 84 is inserted into the horizontal guide groove 34 of the I-ray 30.
By being guided and moved within the stocker 90, it is moved and stored in the stocker 90 while maintaining a strictly horizontal state.

The carriage 40 is thus completely stored in the lowermost stage of the stocker 90 as shown in FIGS. 3a and 3. In particular, as is clear from FIG. 3, in this state, the distal end 82 of the carriage lock arm 80 has entered the front end recess 45 of the carriage 40, but is held without contacting the carriage 40 itself. The dimensions (length in the drawer/storage direction) are determined so that the front end portion 82 is loosely fitted into the four front end portions 45, and the spring 92 provided at a part of the rear corner of the stocker 90
This is achieved by configuring the carriage 40 to be drawn into the stocker 90 by the following steps. That is, when the shuttle 50 approaches the driven pulley 62, the carriage 4
The inwardly bulging portion of the spring 92 is pushed outward by the rear end of the spring 92, and the portion 47 adjacent to the notch 46 (FIG. 12C)
) passes over the top of the spring 92 (at this time, the kettle 50 reaches the final position), the spring 92 elastically returns and its inwardly bulging portion is engaged in the notch 46 (the 13th
(Fig.), the carriage 40 is further retracted slightly in the storage direction by the action of the spring 92, and the engagement between the carriage lock arm tip 82 and the carriage recess 45 is released. The spring 92 has a plurality of stages of inwardly bulging portions arranged in parallel according to the number of stages of the carriages 40 stored in the stocker 90.

Since the carriage 40 is held freely relative to the shuttle 50 while housed in the stocker 90, smooth vertical movement is ensured.

The carriage 40 housed in the stocker 90 is moved onto the tray 30 at the loading position by moving the shuttle 50 in the opposite direction. The lock pin 32 is accommodated in the locking groove 72 immediately after the position shown in FIGS.
The tray lock arm 70 is rotated in the clockwise direction shown in the figure, and the tray 3 is placed in the rotational angular position shown in FIGS. 9a to 9c.
Lock 0.

In this embodiment, the shuttle 50 is attached to the wire 60 in the manner shown in FIGS. 11a and 11s.

The ring-shaped end of the wire 60 on the drive pulley 61 side, which is fixed by the first clamper 65, is hooked to the first locking portion 58 formed below the shuttle 50, and is also fixed to the second clamper 66. The ring-shaped end of the wire 60 on the driven pulley 62 side is connected to the second locking portion 59 via the tension bi 67.
It is hung on. These first and second clampers 65.6
6 and tension-bye 67 are both disposed inside the shuttle 50 and do not have parts protruding from both ends thereof. Therefore, as shown in FIGS. 11C and 11D, the shuttle 50 can be moved to a position substantially directly above the driving pulley 61 and the driven pulley 62. In this way, the shuttle 50 can have a sufficient movement stroke, and there is no need to take up more space than necessary for the arrangement of the shuttle drive mechanism.

The configuration of the stocker 90 capable of storing a plurality of carriages 40 will be described with particular reference to FIGS. 1O a to 10 e. The stocker 90 shown in FIG. The carriage can be pulled out. In this embodiment, the lowermost carriage is used in a single mode like a single-disc CD player, and is equipped with a detection device 99 for detecting the highest position of the stocker 90 in the drawing. Chassis bottom plate 12
A gear 94 that is rotationally driven by a motor 93 is disposed above, and a threaded rod 95 that rotates together is attached coaxially with the gear 94 . On the other hand, a nut 96 that is screwed into the threaded rod 95 is attached to the bottom surface of the stocker 90 so that its axis is coaxial with the center hole lot of the disk 100 on the carriage 40 housed in the stocker 90. The threaded rod 95 is designed to have a slightly small diameter so that it can be inserted into the disk center hole 101.

A spring 98 is wound around the threaded rod 95 to constantly urge the stocker 90 upward. Furthermore, the stocker 90 is stably supported in a horizontal state by pandagraph type support mechanisms 97 on both sides thereof.

In the above configuration, when the gear 94 is rotated clockwise in the drawing, the stocker 90 gradually descends against the spring 98 due to the threaded engagement between the threaded rod 95 and the nut 96, which rotate together with the gear 94, and accordingly. Pandagraph 97 gradually contracts. A pair of notches 116 are formed facing each other on the circumferential edge of a rotary plate 115 fixed on the gear 94, and a detection element 117 provided on the chassis bottom plate 12 detects the notches 116 every half rotation of the gear 94. After applying a negative drive voltage to rotate the motor 93 in reverse for a predetermined short time in response to the rise of the output signal from the detection element 117, the motor 93
(Fig. 15).

By repeating this operation, the stocker 90 is lowered from the highest position to the lowest position (Fig. 1O e). When pulling out the carriage 40 stored in a certain stage of the stocker 90 or storing the carriage 40 in a certain stage, the amount corresponding to the difference between the stage in the position where it can be pulled out/stored at that time and the specified stage is The stocker 90 may be raised or lowered in response to the rise of the output signal from the detection element 117. Further, a switch SWl that is turned on when the highest position of the stocker 90 is detected is provided. Drive control for the motor 93 for raising and lowering the stocker 90 is performed by the control circuit 6 which receives signals from the detection element 117 and the switch swI, and sends an up signal 561 according to the detection result.
Alternatively, the down signal S62 is sent out, and the thus controlled drive voltage 5931 is applied to the motor 93 from the drive circuit 931 (FIG. 19).

The nut 96 is rotatable with respect to the bottom surface of the stocker 90, and a projection 98 provided at the tip of the extension portion 97 is engaged with any one of a plurality of holes 99 formed concentrically about half a circumference on the bottom surface of the stocker. (Fig. 10C).

Depending on which of the holes 9.9 the protrusion 98 is inserted into, it is possible! - Since the rotation angle of the stocker 96 changes, the height position of the stocker 90 can be finely adjusted.

When the carriage 40 is placed on the tray 30, a through hole 36 corresponding to the through hole 48 formed in the disk mounting section 41 of the carriage, particularly the 8 disk mounting section 41b is formed in the tray 30.
is formed. Inside the chassis 10, there are holes aligned with the through holes 36 of the tray 3o in the loading position and the through holes 48 of the carriage 40 placed on the tray.
A reflective detection element 110 is fixedly arranged. When the disc 100 is placed on the tray 30 and the carriage 40 at the loading position, the light emitted from the detection element 110 passes through the through holes 36 and 48 and is placed on the disc 100.
The reflected light then passes through these holes and is detected by the detection element, confirming the presence of the disc. After the fall of the stowing signal, the drive voltage to the motor 63 is controlled to be supplied in pulses, so that the subsequent tray withdrawal speed is gradually reduced.

Then, when the tray 30 reaches the eject position, the tray extension 111 pushes the switch SW5 to open the eject position.
In response to this, the motor 63 is stopped. As shown in FIG. 19, the motor 63 is controlled by the control circuit 6 that receives signals from the detection element 110 and the switch SW5, and sends an up signal S63 or a down signal S64 to the drive circuit 631 according to the detection results. This is done by applying the thus controlled drive voltage 5631 from the drive circuit 631 to the motor 63.

As shown in FIGS. 4a to 4c, an optical head 113 for reproducing digital information recorded on a disk.
A mechanical unit 120 (hereinafter referred to as mechanical unit 120) on which the turntable il1 and the like are placed is disposed below the tray 30 at the loading position so as to be movable up and down in the storage 1.

On the other hand, the presence or absence of a disc detected by turning the tape while holding the tray 30 is displayed on a display (not shown) of the player.

This detection element 110 has through holes 36 and 48 as described above.
In addition to detecting the presence or absence of a disc in a playable state by working in conjunction with It is used as a timing sensor for A reflective member 37 such as silver paper is attached to the back side of the rear end of the tray 30 on the same straight line as the through hole 36 in the tray withdrawal/storage direction. As described above, the lock 5 is released through the engagement between the locking groove 72 of the tray lock arm 70 and the lock pin 32.
0, when the tray 30 is pulled out to a position approximately halfway between the loading position and the ejecting position, the reflecting member 37 reaches a position directly above the detecting element 110, and the tray 30 reaches the position directly above the detecting element 110. or detection element 11
Detected by 0. As shown in the timing sensor of FIG. 16, a clamper 112 is rotatably disposed above the tray 30 facing the detection sensor 111 from the detection element 110. This clamper 112 is rotatably supported by a substantially U-shaped clamp arm 5 whose both ends are fixed between the side plates 2 and 3 of the chassis 1 (FIGS. 1a and 1b). 120 is driven up and down by a pair of support plates 170 and 18 provided on the bottom plate 4 of the chassis 1.
0 through a pair of slide plates 150 and 160 that are slidably supported in the direction C-D in the figure. That is, a pair of pins 12 protruding from both sides of the mechanical unit I.
1.122 is a pair of guide grooves 171, 172; 181, 1g formed in the vertical direction on the support plates 170:180, respectively.
2, and is also engaged in the respective cam grooves 151, 152; 161, 162 in the slide plates 150; 160, and as the slide plate moves, the pin is guided along the cam grooves. Mechanical unit 120 is moved in the vertical direction. The state in which the mechanical unit waits in the lowered position is shown in FIGS. 4a to 4c, and the patented state in which the mechanical unit is in the raised position and features disk playback is shown in FIGS. 5a and 5s. There is.

The cam grooves 151 and 152 of the slide plate +50 are formed in opposite directions to the cam grooves 161 and 162 of the slide plate 160. Below, the cam groove is inserted into one slide plate 1.
50, the cam groove 15L 152 has inclined portions 151b, 152b inclined with respect to the direction of movement of the slide plate (direction C-D in the drawing); inclined portions 151b, 152;
A first horizontal portion 1 that is continuous with the lower end of 2b and parallel to the moving direction.
51a, 152a and a second horizontal portion 151c that is continuous with the upper ends of the inclined portions 151b, 152b and parallel to the moving direction;
152c. In addition, slide plates 150 and 1
60 are mutually connected by an arm 128 that is rotatable around a pivot pin 127 that is implanted on the bottom plate 4.

A rack 115 extending along the direction CD in the figure is formed at the lower end of one slide plate 150, and a pinion 125 that meshes with the rack 115 is provided on the bottom plate 4. Further, at the upper end of the bottom plate 4 on the side where the motor 123 connected to the motor drive circuit 1231 is provided, a tray lock arm 130 is rotatably supported on a horizontal plane. The tray lock arm 130 has a slide plate 150 shown in FIG.
An operating pin 138 is provided which can come into contact with a notch 158 formed at the upper end of the direction side, and is biased counterclockwise by a spring 131.
is regulated in position while being engaged with the support plate 170. Further, a roller 132 is rotatably installed at the tip thereof so as to face the lower surface of the tray 30. and,
When this roller 132 engages with a rib 38 formed on the lower surface of the tray 30, the tray 30 is held in a locked state with respect to the mechanical unit 120 (chassis 1). (FIG. 4C1 FIG. 5B) Further, the support plate 170 and the bottom plate 4 are provided with switches SW2 and SW3 for detecting the positions of the slide plate 150 and the mechanical unit 120.

The switch SW2 is mounted on the support plate 170 at a position where it can face the notch 154 formed in the upper surface 153 of the slide plate +50, and the switch SW2 is attached to the fourth pinion 125.
is connected to the motor 123 via a gear device 124.

Therefore, the mechanical unit 120 shown in FIG. 4 C1 and FIG. 5 C
At the lowered position, when the motor 123 is rotated in a predetermined direction and the slide plate 150 is slid in the direction shown, the arm 128 is rotated counterclockwise and the other slide plate 1
60 is translated in the direction C in the figure at the same speed. As a result, mechanical unit l-120
2 is the cam groove 151, 15 of both slide plates 150; 160
2; guided by 161 and 162, it is moved upward parallel to the bottom plate 4, and the raised position (disc clamp position) shown in FIGS. 5a and 5s is obtained.

In the lowered position shown in FIG. 4a, the bins 121 and 122 of the mechanical unit 120 are locked to approximately midway portions of the first horizontal portions 151a and 152a of the cam grooves 151 and 152, while in the lowered position shown in FIG. In the raised position shown in a, the second
horizontal portion 151c.

152c is locked approximately in the middle. Also slide plate 1
Direction C in the drawing of support plate 170 supporting 50: 32 As shown in Figure a, the bins 121 and 122
．． When the mechanical unit 120 is located approximately halfway between the first horizontal portions 151a and 152a of the slide plate 152 and is in the lowered position, it comes into contact with the upper surface +53 of the slide plate 150 and is turned ON, and at other positions, the notch 154 It turns OFF when it faces.

On the other hand, the switch SW3 is mounted on the bottom plate 4 at a position facing the notch 157 formed in the lower end extension 156 of the slide plate 150, and as shown in FIGS. are the cam grooves 151, 152
When the mechanical unit 120 is located approximately halfway between the second horizontal portions 151c and 152c and is in the raised position, it comes into contact with the wall 157a of the notch 157 on the C direction side in the drawing, and is turned ON. In addition, the slide plate 150 is
It is further moved from the position shown in FIG.
At the position shown in FIGS. 6a and 3116, where it comes into contact with the wall 157b of the notch 157 in the direction shown in the drawing, it becomes ON. At other positions, it faces the notch 157 and is turned off.

As shown in FIG. 19, the switches SW2 and SW3
The outputs S2 and S3 of are connected to a control circuit 6, which controls the motor drive circuit 123 based on the operation detailed below.
1 and 631 to output control signals.

The operation will be described below with reference to FIGS. 17 and 18. The mechanical unit 120 is currently in the raised position shown in FIGS. When a switch (not shown) is operated, the control circuit 6 sets the down signal S66 to the "H" state, causes the drive voltage 51231 of the motor drive circuit 123 to become a negative output, and drives the motor 123. As a result, the slide plate 150 moves in the direction C shown in the figure.
60 are moved in the directions shown at the same speed. Configuration and movement of slides 150, 160. In this position, the tray 30 is still locked, but
The notch 158 of the slide plate 121 comes into engagement with the actuation 137 of the tray lock arm 130.

The slide plate 150 further moves the pins 121 and 12 from this position.
2 is the terminal end 151a of the first horizontal portion 151a, 152a
, +52a, in the direction of drawing C until it comes into contact with the lock release position shown in FIGS.

Due to this movement, the tray lock arm 130 engages the spring 13 through the notch 158 and the culm operating bin 137.
The roller 1 is rotated clockwise in the drawing against the urging force of the roller 1.
32 and the rib 38 are disengaged. In this way, the tray 30 is unlocked from the mechanical unit 120 (chassis I), and can be moved to the eject i position by the shuttle 50 as described above. When the slide plate 150 reaches this unlocked position, the switch SW
3 comes into contact with the wall 157b of the notch 157 and becomes ON again. Since the operation of the control circuit 6 to turn on the output S3 of the switch SW3 is approximately symmetrical, only one slide plate 150 will be described below.
The pin 121. is engaged with second horizontal portions 151c, 152c of a pair of cam grooves 151, 152 formed in the pin 121.
122 is the inclined portion 151b, +52 of the cam groove 151, 152 as the slide plate 150 moves in the direction C in the drawing.
b, thereby mechanical unit 120
is moved downward. At the beginning of the movement of the slide plate +50 in the direction C in the drawing, the pins 121 and 122 pass through the second horizontal portions 151c and 152c, and the inclined portions 151b and 1
52b, the contact between the switch SW3 and the wall 157a of the notch 157 is released, and the switch SW3 is turned OFF. The pins 121 and 122 are the first horizontal portions 151a of the cam grooves 151 and 152.

152a, the mechanical unit 120 moves to
~Assume the lowered position shown in Figure 4C. In this lowered position, the switch SW2 is activated on the upper surface 153 of the slide plate 150.
When it is turned ON by moving away from the notch 154 formed in the top surface 154 and coming into contact with the upper surface 153, the down signal S66 is set to the "L" state, and the drive voltage 51231 of the motor drive circuit 1231 is turned on.
is zero, the motor 123 is stopped, and the slide plate 150
to the unlocked position. Further, when the output S3 of the switch SW3 is turned ON, the control circuit 6 sets the eject signal S63 to the H''' state, and the motor drive circuit 63
1 drive voltage 5631 is made to be a negative output. As a result, the pulley drive motor 63 is rotated, and the pulley drive motor 63 is rotated.
The tray 30 is moved in the eject direction via the .

In the illustrated embodiment, the control circuit 6 includes the switch SW3
for a predetermined period of time, e.g. 100m, after turning on again.
After 5 ec, the up signal S65 is set to the "H" state, the drive voltage 51231 of the motor drive circuit 1231 is made to have a positive output, and the slide plate 150 is moved in the direction shown in the figure. When the switch SW3 is moved to the position shown in , and the switch SW3 is separated from the wall 157a of the notch 157 and its output S3 is turned off again, the control circuit 6 sets the up signal S65 to the "L" state, and the motor drive circuit 1231 is driven. The voltage 51231 is set to zero and the slide plate 150 is stopped at the position shown in FIG. 4a. Thus, as shown in FIG.
30 is a stopper pin 138 due to the biasing force of a spring 131.
The tray 3 is rotated counterclockwise in the figure until it engages with the support plate 170, and then the tray 3 is loaded from the eject position.
The rib 38 of 0 is held in a standby state so as to be automatically locked by the roller 132. That is, when the loading switch is pressed at the eject position of the tray 30 shown in FIG. output. This results in
The pulley drive motor 63 is rotated, and the tray 30 is moved in the loading direction via the shuttle 50.

Then, the tray 30 is moved to the loading position shown in FIG. 1 and FIG. 1C, and the switch SW4 is turned on.
When the N state is reached, the control circuit 6 outputs the loading signal S64.
When the output S3 of the switch SW3 is turned on at the position shown in FIG.
The drive voltage 51231 of the motor drive circuit 1231 is set to zero by setting the down signal S66 to the "L"'' state, but the down signal S66 is kept "L" until the loading switch is pressed next and the tray 30 is moved to the loading position. During loading, the control circuit 6 sets the loading signal S64 to the "L" state to stop the tray 30 at the loading position and sets the up signal 365 to the "H" state by turning on the switch SW4. , the drive voltage 31231 of the motor drive circuit 1231 is outputted positively, and the slide plate 150 is moved in the direction shown. When the slide plate 150 is moved to the positions shown in FIGS. 4a and 4C and the switch SW3 is separated from the wall 157a of the notch 157 and its output S3 is turned off again, the control circuit 6 outputs the up signal S65. Set to “L” state, drive voltage 51231 of motor drive circuit 1231 to zero,
The slide plate 150 is stopped at the position shown in FIG. 4a.

Therefore, the drive voltage S631 of the dynamic circuit 631 is set to zero to stop the tray 30 at the loading position. During the movement of the tray 30, when the tray 30 is moved to the position shown in FIG. When the tray 30 is rotated clockwise against the biasing force of the roller 131 and the roller 132 engages in the recess of the rib 38 at the loading position of the tray 30 shown in FIG. locked. Therefore, according to this embodiment, the tray 30 is locked at the loading position upon reaching the loading position.

Unlike the above embodiments, the slide 150 is configured to maintain the position of the slide 150 in the state shown in FIGS. 6a and 6s after the tray 30 is unlocked by the tray lock arm 130 and becomes the state shown in FIGS. is also possible. In this case, as shown in the timing chart of FIG. 18, the control circuit 6 operates as shown in FIG.
, Sixth, even with this configuration, the tray 30 can be locked at the loading position.

<Effects of the Invention> According to the present invention, the stocker elevating device can be realized using the outside diameter of the stocker without requiring any structural members on the circumferential side of the stocker, which contributes to downsizing of the player. can.

[Brief explanation of drawings]

Figures 1a to 1d show the configuration of a compact disc player to which a preferred embodiment of the present invention is applied, with the tray in the loading position and the mechanical unit in the standby position. Front view, side view, top view, cross-sectional view taken along line a-a in Figure 1C, side view and top view showing the tray in the eject position, Figures 3a and 2. Fig. 3 is a side view and a plan view showing a state in which all the carriages are stored in the stocker, and Fig. 4a to Fig. 4C show the elevating device in particular when the mechanical unit is in the standby position. Figures 5a and 5a are side views and top views showing the mechanical unit in its operating position, particularly its lifting device; Figures 6a and 6a are FIG. 7 is a side view and a plan view showing the tray locking device in a state where the tray is unlocked; FIG. 7 is a plan view showing the tray locking device in a state where it has returned to the lock standby position; Diagram e
1]-b are enlarged views of the tray loading device;
Figure C is a sectional view taken along line c-c in Figure A, Figure d is a further enlarged cross-sectional view of a part of Figure 2 to show its effects, and Figure E is a cross-sectional view taken when the tray is ejected. 9A to 9C are enlarged partial front views, side views, and plan views showing details of the drive mechanism of the tray and carriage by the shuttle; 4;) FIG. 17 is a timing chart showing the ejecting and loading operations of the tray performed in conjunction with the lifting and lowering of the mechanical base. FIG. 18 is a timing chart showing the ejecting and loading operations of the tray in another embodiment. The figure is a block diagram showing a control system for each drive motor. Explanation of symbols 10... Chassis 30... Tray 40... Carriage 50... Shuttle 70... I. Ray.
Lock arm 80... Carriage lock arm
90...Stocker 93...Motor 94...Gear 95...Threaded rod 96...Nut 98...
Spring ]00...Disc 101...Disc center hole

Claims (3)

[Claims] (1) In a changer-type disc player configured to be able to store a plurality of discs in a stocker, and to pull out any one of the discs stored in the stocker to a playable position and play it by a disc playback means. , a gear rotationally driven by a drive source, a threaded rod that is fixed coaxially with the gear and rotates together with it and has a smaller diameter than the center hole of the disk, and is coaxial with the center hole of the disk housed in the stocker. A stocker elevating device comprising: a nut attached to the stocker and screwed into the threaded rod, the threaded rod being able to be inserted through a center hole of the disk housed in the stocker. (2) The stocker lifting device according to claim 1, further comprising a spring that biases the stocker in a direction to raise the stocker. (3) The stocker lifting device according to claim 1 or 2, wherein the disk is stored in the stocker while being placed on a carriage, and the carriage has an opening through which the threaded rod can be inserted.