JP2516827B2 - Disc player - Google Patents

Description

The present invention relates to a disc player capable of reproducing a disc.

<Prior Art> In a compact disc player, a tray on which a compact disc can be directly or indirectly placed is housed in a player body through an appropriate drive mechanism so that recorded information on the compact disc can be reproduced. It is provided so as to be reciprocable between the position and an eject position where the compact disc can be exchanged by being pulled out from the player body.

In such a disc player, it is not possible to directly visually confirm whether or not the disc is actually placed on the tray when the tray is at the loading position. Therefore, it is necessary to provide a means for detecting the presence or absence of the disc on the tray at the loading position, and display the detection result on the display of the player to improve the operability. On the other hand, a detection means for detecting the pull-out position of the tray moved from the loading position toward the eject position and stopping the tray at the eject position is also required.

Japanese Unexamined Patent Publication No. 59-119565 discloses a structure in which the detection of the presence or absence of the disk and the detection of the tray pull-out position can be shared. In this configuration, the light emitting element 33 and the light receiving element 34 are arranged to face the player body with the tray 31 in between. The tray 31 has a first through hole for optically coupling the light emitting element 33 and the light receiving element 34 at the eject position.
These light emitting elements are formed when 313 is formed and the disk 17 is not placed at the loading position.
A second through hole 314 for optically coupling 33 and the light receiving element 34 is formed.

<Problems to be Solved by the Invention> In the case of the above conventional technique, the tray has the first and second through holes that optically couple the light emitting element and the light receiving element at the eject position and the loading position of the tray. Must be extended in the loading direction by the movement stroke. Therefore, as shown in FIG. 2 of the publication, when the tray is in the loading position, the rear portion of the tray is projected to the inner side of the disc reproducing mechanism, and there is a drawback that the depth of the player must be increased. In particular, the applicant is the Japanese Patent
In the type proposed in No. 219071, that is, in the stocker type disc player configured so that a plurality of discs on the tray that is moved forward between the loading position and the eject position can be stored in the stocker arranged further behind the loading position. Since the tray cannot be extended inward to form the through hole, it is impossible to use the disk presence / absence detecting means in the above-mentioned conventional technique for detecting the tray pull-out position.

Further, in the above-mentioned conventional technique, the light emitting element and the light receiving element are arranged to face each other through the tray, so that the configuration is complicated.

<Means for Solving the Problems> An object of the present invention is to solve the above-mentioned problems, and a tray on which a disc is directly or indirectly mounted is housed in a player main body and a loading position that enables reproduction of the disc. In a disc player capable of reciprocating between an eject position pulled out from a player main body, the disc player is arranged below the tray at the loading position of the tray to detect the presence or absence of a disc placed on the tray. The light reflection type detection element and the light reflection type detection element face the light reflection type detection element at the substantially middle position of the tray so that the light reflection type detection element can detect a substantially intermediate position between the loading position and the eject position of the tray. The light reflecting member disposed on the lower surface of the tray, and from the loading position of the tray, And a tray moving speed control means for reducing the subsequent tray moving speed in response to the detection of the substantially intermediate position by the light reflection type detecting element when moving to the eject position.

<Operation> When the tray is in the loading position and the disc is placed, the light emitted from the light reflection type detection element fixed to the chassis passes through the through hole formed in the tray and is reflected on the disc recording surface. The reflected light then passes through the through hole again and is received by the detection element to detect the presence of the reproducible disc. When the tray reaches a substantially intermediate position in the ejecting operation in which the tray is moved from the loading position to the ejecting position, the light emitted from the light reflective detection element is reflected by the light reflecting member provided at the rear end of the tray or the like. The light is reflected and received by the detection element, the predetermined position of the tray is detected, and thereafter, the moving speed of the tray is reduced.

<Example> Hereinafter, the present invention will be described in detail based on illustrated examples. In this embodiment, a tray that can be pulled out / stored with respect to the player main body is provided with a carriage on which a disc can be placed and which can be moved in the drawn / stored direction with respect to the tray.
Further, the stocker disc player is configured by disposing a stocker capable of accommodating a plurality of carriages (seven in the illustrated example) inside the player and capable of moving up and down. With this configuration, a so-called changer function is realized which enables one of a plurality of carriages accommodated in the stocker to reproduce a disc mounted thereon, and a normal single disc CD. As with the player, the tray can be used to load / unload the disc. Regarding the basic configuration of such a stocker type disc player, the applicant's prior application, Japanese Patent Application No. 1-21
It is being described in No. 9071.

First, referring to FIGS. 1a to 1d and 2a and 2b, a shaft 9 extending along a pulling out / accommodating direction of a tray 30 is fixed to a side plate 2 of a chassis 1 forming a player main body. The shaft 9 is supported by the guide member 31 fixed to one side of the chassis 30 so as to be able to move forward and backward in the drawing / accommodating direction with respect to the chassis 1. On the other hand, the other end of the tray 30 is fixed with a guide rail 22 extending along the pulling out / storing direction, and the guide rail 22 is fixed to the chassis 1 by a guide piece 14 fixed on the bottom plate 4 of the chassis 1. It is guided so that it can be moved forward and backward in the pull-out / storage direction. Therefore, the tray 30 projects forward from the chassis 1 (player main body) and is in the eject position (FIGS. 2a and 2b) where the disc can be placed, and the tray 30 is housed inside the chassis (player main body) so that the disc can be reproduced. It can be moved forward and backward in the pull-out / storage direction with respect to the loading position (Fig. 1, b, c). With particular reference to FIGS. 8a to 8c, the first arm extending along the pulling-out / accommodating direction at the upper end of the guide piece 14 extends along the pulling-out / accommodating direction and has a tip at the pulling-out side.
15 is integrally formed, while the first arm is on the storage direction side.
Second arms 16 each having a length longer than that of 15 by a predetermined dimension and having a tip on the storage direction side are integrally formed. The 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, 21 positioned so as to slidably contact the lower surface of the lower end portion 23 of the guide rail 22 are rotatably supported by the guide piece 14 at a position substantially below the upper guide rollers 17, 18, and further downward. The guide piece 14 above the guide rollers 20 and 21 is integrally formed with flanges 27 and 28 that can be engaged with the upper surface of the lower end portion 23, respectively. The distance between the upper guide rollers 17 and 18 and the lower guide rollers 20 and 21 is the guide piece.
In the normal state of 14, the size is set to be slightly smaller than the thickness of the guide rail 22, while the distance between the lower guide rollers 20 and 21 and the flanges 27 and 28 is set to be slightly larger than the thickness of the guide rail 22. . As a result, the lower end portion 23 of the guide rail 22 is pressed and nipped between the upper and lower guide rollers due to the bending of the first and second arms 15 and 16 (Fig. 8d), and the lower guide rollers 20 and 21 are provided.
And the flanges 27 and 28 are loosely fitted.

Therefore, rattling of the tray 30 is prevented by the above-mentioned pressure contact pinching action, and in the direction A (Fig. 8e) in the drawing, the upper surface side of the lower end portion 23 of the guide rail 22 abuts on the flange 27, while being shown in the figure. In the B direction (Fig. 8e), the range is restricted until it comes into contact with the flange 28.

Further, in the present embodiment, as described above, the first arm 15 is formed to be shorter than the second arm 16 by a predetermined dimension, and the clamping force of the guide rail 22 by the upper and lower guide rollers is set to the first arm 15 side. By making the setting stronger on the (drawing direction side), the backlash of the tray 30 can be removed more effectively.

That is, the backlash of the tray 30 is particularly problematic at the eject position, and therefore it is necessary to positively remove the backlash at the eject position. The tray 30 is shown in FIG. 8e.
Guide rail 22 and guide piece 14 in the eject position of
In this state, for example, when the operator grips the front end of the tray 30 (the end 22a on the pull-out direction side of the guide rail 22) by hand and displaces it in the direction A in the drawing, , The guide rail 22 is rotated in the A direction around the contact portion P ₁ between the lower end portion 23 and the lower guide roller 21, and when the guide rail 22 is displaced in the B direction in the figure, the lower end portion 23 and the lower guide roller 20 are rotated.
It is rotated in the B direction around the contact portion P ₂ with. For this reason,
The distance from the contact portion P ₁ as the fulcrum to the end portion 22a as the point of action at the time of rotation in the A direction is larger than the distance from the contact portion P ₂ to the end portion 22a at the time of rotation in the B direction. Therefore, in order to regulate the displacement of the tray 30 in the A and B directions in the figure and to make the rigidity against the backlash equal in both directions, the regulation force when rotating in the A direction is made stronger than in the B direction. There is a need. On the other hand, when the guide rail 22 is rotated in the direction A in the drawing, it is mainly the first arm.
The pressing contact force of the upper roller 17 due to the bending of 15 acts as a displacement restricting force, and conversely, when rotating in the direction B in the figure, the pressing contact force of the upper roller 18 mainly due to the bending of the second arm 16 is the displacement restricting force. Acts as.

Therefore, in this embodiment, the first arm 15 and the second arm 16 are configured as described above, and the pressure contact force of the guide rail 22 on the first arm 15 side is set to be stronger than that on the second arm 16 side. As a result, not only the rigidity of the tray 30 against backlash can be made sufficiently high, but also it becomes possible to make the tray 30 equal in the directions A and B.

In the above-described embodiment, the first rigidity is set so that the rigidity of the tray 30 is equalized regardless of its directionality (A and B directions in the drawing).
By configuring the arm 15 and the second arm 16 as described above, the pressure contact pinching force of the guide rail 22 as the entire guide piece 14 is set to be relatively large. For this reason, the guide rail 22 is guided by the guide piece 14, so that the tray 30
It is conceivable that the load applied to the tray drive system, which will be described later, becomes relatively large when the tray is moved. Therefore, when the load on the tray drive system is preferentially reduced, the length of the first arm 15 is made equal to that of the second arm 16 and the pressure contact pinching force is set to be relatively small. Good. Even in this case, the guide piece 14 prevents the backlash of the tray 30. Thus, in the tray 30, the guide rail 22 is the guide piece.
14 upper guide rollers 17, 18 and lower guide rollers 20, 21
It can be moved in the pulling out / storing direction with respect to the chassis 1 while being pressed and sandwiched therebetween.

The tray 30 is movable in the pull-out / retracting direction between the loading position and the eject position as described above, and the carriage 40 is always placed during the movement between the loading position and the eject position. .
On the other hand, the carriage 40 is provided so as to move forward with respect to the tray 30 so as to move together with the tray 30 and further move further away from the tray 30 at the loading position and stored further in the stocker 90. As a driving means for the tray 30 and the carriage 40, a shuttle 50 that moves in the pulling / accommodating direction of the tray 30 by a wire 60 is used.

With particular reference to FIGS. 9a-9c below, the wire 60
Is wound between the drive pulley 61 and the driven pulley 62 on the side plate 2 side of the chassis 1. The drive pulley 61 is rotatably driven at an arbitrary speed by a motor 63 that is axially supported by the side plate 2 and is connected to a drive circuit 631 via a gear device 64. The shuttle 50 is fixed to both ends of the wire 60. On the outer side surface of the shuttle 50, the lower end of the guide rail 24 fixedly attached to the inner side surface of the side plate 2 over substantially the entire length thereof is bent inward in the pulling out / storing direction of the tray 30. Horizontal rails running along
A concave groove 52 for receiving 25 is formed, and the shuttle 50 is configured to be horizontally moved as the wire 60 is driven to rotate. The horizontal rail 25 extends horizontally along the inner surface of the side plate 2 over substantially the entire length thereof (Fig. 9b).

A tray lock arm 70 is pivotally supported by a pivot pin 56 penetrating the upright portion 54 of the shuttle 50, and a carriage lock arm 80 is fixed to the upright portion 54. The tray lock arm 70 is formed with a locking groove 72 capable of locking the lock pin 32 protruding outward from the side surface of the tray 30 and a guide groove formed on the upper inner surface side of the guide rail 24.
A guide pin 74 that engages with the 26 is formed. Guide groove 26
Extends along the inner side surface of the side plate 2 over substantially the entire length thereof, but a first horizontal portion 26a extending horizontally in the drawer / retracting direction of the tray 30 at the front thereof and a first horizontal portion 26a at the rear thereof. It is composed of a second horizontal portion 26c that horizontally extends a level slightly lower than the portion 26a, and a bent portion 26b that connects these first and second horizontal portions (FIG. 9b).

Before describing the carriage lock arm 80, the structure of the carriage 40 itself and the structure of the tray 30 in a portion related to the carriage 40 will be described with reference to FIGS.
Describing with reference to FIGS. 1 to 1d, a disc placing portion 41 for placing a disc is formed on the upper surface of the carriage, and for discriminating the position of the disc placed on the disc placing part. Projections 42a to 42d are formed. On the other hand, when the carriage 40 is placed on the tray 30, the top plate 301 of the tray 30 facing the disc placing portion 41 has an opening 302 having substantially the same shape as the disc placing portion 41. Further, on the lower surface side of the top plate 301 facing the protrusions 42a to 42d, a protrusion is formed when the carriage 40 moves forward with respect to the tray 30.
Concave grooves 303a to 303d that allow the movement of 42a to 42d are formed to extend along the tray 30 withdrawing / accommodating direction. On the underside of the carriage, a pair of ridge rails 43a, 43b;
d is formed so as to extend along the pulling-out / accommodating direction, and when a plurality of carriages are stacked, the concave grooves 431; 432 formed between the pair of protruding rails 43a and 43b; 43c and 43d on the lower surface of the upper carriage, respectively. Projections 42a and 42b; 42c and 42d on the upper surface of the lower carriage are received therein. Near the front end of the upper surface of the carriage 40, a lock spring with a downward bias attached near the front end on the lower surface side of the tray 30 top plate 301.
A pair of recesses 49a, 4 into which 39a, 39b (FIGS. 9A to 9C) can be engaged.
9b is formed. Further, on the upper surface of the bottom plate 304 of the tray 30, there is formed a pair of projecting rails 35a and 35b which are slidably fitted into the concave grooves 431 and 432 formed on the lower surface of the carriage 40 (FIGS. 9A to 9C). 9 c).

The carriage 40 in this example has a 12 cm disc mounting portion 41a and a slightly lower level than the disc mounting portion 41 so that two types of discs of different sizes currently on the market can be mounted. It is composed of an 8 cm disc mounting portion 41b. A through hole 48 is formed in the 8 cm disk mounting portion 41b, and a through hole 308 is formed in the bottom plate 304 facing the same. Reference numerals 44 and 306 are openings formed in the carriage 40 and the tray bottom plate 304, respectively, in order to allow the optical reading mechanism for reproduction to access the disc placed on the disc placing portion 41. A concave portion 45 into which the front end portion 82 of the carriage lock arm 80 can be engaged is cut out near the front end on one side of the carriage 40. In order to facilitate storage in the stocker 90 described later, the front end and the rear end of the carriage 40 are tapered surfaces. Further, a notch 46 that can be engaged with a spring 92 described later is formed in the vicinity of the rear end of the carriage 40.

Referring again to FIGS. 9a to 9c, the carriage lock arm 80 will be described. The carriage lock arm 80 is an elongated plate-like body that extends over substantially the entire length of the tray 30. A leading end portion 82 that can be engaged with the concave portion 45 at the front end of the carriage 40 is formed by standing up from the front end and further bending inward. Here, the dimension of the tip end portion 82 in the pulling out / accommodating direction is set smaller than the dimension of the recessed portion 45 in the same direction, and both are configured so that they can be engaged / disengaged. In the loading position of the tray 30 shown in FIG.
The one end portion 82a on the pull-out direction side of the wall portion 4 on the pull-out direction side of the recess 45 is
5a is engaged. Further, at the front end of the carriage lock arm 80, a guide pin that can be engaged with a guide groove 34 that is formed on the inner surface of the tray 30 and extends along the pulling out / storing direction.
84 is formed so as to project inward.

Now, the tray 30 on which the carriage 40 is placed is in the loading position shown in FIGS. 1a to 1c and 9a to 9c, that is, the tray 30 is accommodated in the player body and the disc on the carriage 40 is placed. It is assumed that recording / reproducing is possible with respect to. From this loading position, the disc mounted on the carriage 40 can be replaced with another disc or the carriage 40 on which the disc is not mounted.
When attempting to move the tray 30 to the eject position shown in FIG. 2a and FIG. 2b together with the carriage 40 placed on it in order to place a new disc to be played back,
The shuttle 50 is moved forward in the direction of the drive pulley 61 by driving the wire 60 to rotate counterclockwise in the drawing. While the shuttle 50 is horizontally moved to the foremost end position (eject position) by the engagement of the groove 52 of the shuttle 50 and the horizontal rail 25 of the guide rail 24, the tray 30 remains in the state in which the carriage 40 is placed. Then, the lock pin 32 and the lock groove 72 of the tray lock arm 70 are engaged with each other to move in the same direction. As described above with reference to FIGS. 8a to 8e, the movement of the tray 30 is performed in a strict horizontal direction by pressing and sandwiching the guide rail 22 between the guide rollers 17, 20; 18, 21 on one side thereof. You are promised to move and the rattling is effectively prevented. While the tray 30 moves from the loading position to the eject position, the guide pin 74 projecting 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 is secured.
Therefore, the lock pin 32 can effectively transmit the driving force associated with the movement of the shuttle 50 to the tray 30 without being disengaged from the locking groove 72. The carriage 40 moves integrally with the tray 30 because the lock springs 39a and 39b are engaged in the recesses 49a and 49b.
At this time, the carriage lock arm 80 is also moved integrally with the tray 30 and the carriage 40 by the shuttle 50.
During the movement and the stop position (eject position), the carriage lock arm 80 is kept in a state in which the side end 82a of the tip end portion 82 of the carriage lock arm 80 on the pull-out direction side is engaged with the wall portion 45a of the recess 45.

Since the movement of the tray 30 from the eject position to the loading position is performed only in the opposite direction in the same manner as described above, the description thereof will be omitted. As shown in FIGS. 1b and 2a, a switch SW4 for detecting the arrival of the tray 30 at the loading position is provided at a position on the chassis 1 corresponding to the end of the tray 30 on the storage direction side. It is provided. The output of the switch SW4 is connected to the control circuit 6 (FIG. 19) described later.

When the disk on the carriage 40 placed on the tray 30 in the loading position is to be stored in the empty space in the stocker 90, the shuttle 50 is moved from the intermediate position (loading position) shown in FIG. Move horizontally in the direction of. When the shuttle 50 is moved slightly from the position shown in FIG. 9b in the storage direction, the guide pin 74 located at the end of the first horizontal portion 26a in the guide groove 26 moves to the bent portion 26b, and Accompanied by tray lock arm 7
0 rotates about the pin 56 in the counterclockwise direction in the drawing. As a result, as shown in FIG. 14A, the lock pin 32 is disengaged from the locking groove 72, and the lock on the tray 30 is released. Therefore, even if the shuttle 50 moves from the intermediate position in FIG. 9b to the right in the drawing, the tray 30 remains in the loading position, and the tip end 82 of the carriage lock arm 80 and the carriage recess 45 which are moved together with the shuttle 50 are separated. Only the carriage 40 is further moved to the right in the drawing through the engagement (FIG. 14b) and against the biasing force of the carriage regulating springs 39a and 39b. That is, by the movement of the shuttle 50 in the accommodation direction when the guide pin 74 passes through the bent portion 26b of the guide groove 26, first, the side end of the tip end portion 82 on the accommodation direction side.
82b is engaged with the wall portion 45b of the recess 45 on the storage direction side, and then the carriage 40 is moved in the storage direction to form the recesses 49a, 49b.
The lock springs 39a, 39b are separated from the lock springs. This makes the carriage 40 free to move with respect to the tray 30,
As the shuttle 50 moves in the storage direction, it is moved in the same direction. Then, after this, the shuttle 50 is moved to FIGS. 3a and 3b.
When the carriage 40 is moved to the rearmost position (storage position) shown in (4), the carriage 40 is stored in the empty space in the stocker 90 (the lowest stage in the illustrated example). During the movement of the shuttle 50 described above, the concave grooves 431, 432 of the carriage 40 are guided by the ridge rails 35a, 35b provided on the tray 30, so that the carriage 40 is moved while being kept in a strict horizontal state and placed in the stocker 90. It is stored. Further, since the tray lock arm 70 is moved with the guide pin 74 of the tray lock arm 70 fitted in the second horizontal portion 26c of the guide groove 26, the rotation angle shown in FIGS. Retained.

Thus, the state where the carriage 40 is completely stored in the lowermost stage of the stocker 90 is shown in FIGS. 3a and 3b. In particular, as is apparent from FIG. 3b, in this state, the tip end 82 of the carriage lock arm 80 has the carriage 82.
Although it is inserted into the front end recess 45 of 40, it is held in a non-contact manner with the carriage 40 itself. As described above, the respective dimensions (length in the pulling out / storing direction) are determined so that the tip end portion 82 is loosely fitted in the front end recessed portion 45, and the spring provided at the back side corner of the stocker 90. Achieved by the carriage 92 being configured to be retracted into the stocker 90 by 92. That is, when the shuttle 50 comes close to the driven pulley 62, the rearward end of the carriage 40 pushes the inner bulging portion of the spring 92 outward, and the notch 46
At the moment when the portion 47 (Fig. 12c) close to the point has passed over the apex of the spring 92 (at this time, the shuttle 50 reaches the end position), the spring 92 elastically returns and its inward bulge portion becomes notch 46.
The carriage 40 is further retracted slightly in the housing direction by the action of the spring 92 to release the engagement between the carriage lock arm tip portion 82 and the carriage recess 45, and at the same time, the carriage 92 is engaged. 40 is locked in the storage position in the stocker. The spring 92 is provided with a plurality of stages of inward bulging portions arranged in parallel according to the number of stages of the carriage 40 accommodated in the stocker 90. Since the carriage 40 is held freely with respect to the shuttle 50 in the state of being stored in the stocker 90, a smooth vertical movement is guaranteed.

When moving the carriage 40 stored in the stocker 90 onto the tray 30 in the loading position, the shuttle 50 is moved in the opposite direction. That is, when the wire 60 is driven counterclockwise by the motor 63 and the shuttle 50 is moved in the pulling-out direction from the state shown in FIGS. 3A and 3B, the side end of the carriage lock arm 80 at the tip end portion 82 thereof. 82a is engaged with the wall 45a of the recess 45, and the carriage 40 is moved in the pull-out direction. And FIG. 9a
~ Tray 30 in loading position shown in Figure 9c
When the carriage 40 is moved to the position, the lock springs 39a and 39b are re-engaged in the recesses 49a and 49b of the carriage 40, and the carriage 40 is locked to the tray 30. On the other hand, immediately after the position shown in FIGS. 14a and 14b, the lock pin 32 is housed in the locking groove 72, and the guide pin 74 is guided to the bent portion 26b to show the tray lock arm 70. The tray 30 is rotated clockwise to lock the tray 30 at the rotational angle positions shown in FIGS. 9a to 9c.

In this embodiment, the shuttle 50 is connected to the wire 60 at the eleventh position.
It is mounted as shown in Figures a and 11b. Drive pulley 6 for wire 60 formed by first clamper 65a
A first ring-shaped end 66a extending from 1 is locked to a first locking portion 59a formed on the driven pulley 62 side of a locking member 58 fixed inside the shuttle 50, and a second clamper 65b. Second extending from a driven pulley 62 of a wire 60 formed by
The ring-shaped end 66b of the second locking portion 5
Locked to 9b. Therefore, the wire 60 is locked inside the shuttle 50 by the locking member 53 in a state where it crosses in a substantially X shape, and the first and second ring-shaped ends 66a, 66b and the first and second clampers 65a. 65b and the tension spring 67 are both arranged inside the shuttle 50 and have no portions projecting from both ends thereof. Further, as shown in FIGS. 11c and 11d, in the horizontal rail 25 for guiding the shuttle 50 in the pulling out / storing direction, the locking member 58 has the driving pulley 61 and the driven pulley 62 while the shuttle 50 is moving. Is arranged above both pulleys 61 and 62 so as to pass above. Therefore, as shown in FIGS. 11c and 11d, the shuttle 50 can move to a position substantially directly above the drive pulley 61 and the driven pulley 62. Thus, the travel stroke of the shuttle 50 can be sufficiently taken, and it is not necessary to take up more space than necessary for the arrangement of the shuttle drive mechanism.

The structure of the stocker 90 capable of accommodating a plurality of carriages 40 will be described with reference to FIGS. 10a to 10e. 10th
The stocker 90 shown in FIGS. A and 10b is in the most raised position, and when the stocker is in this position, the carriage 40 can be stored in the lowermost stage or the carriage stored in the lowermost stage. Can be withdrawn. In the present embodiment, the lowermost carriage is used in the single mode like the single disk CD player, and is provided with the detection switch SW1 for detecting the highest position of the stocker 90 in the drawing. On the bottom plate 4 of the chassis 1,
A gear 94 that is rotationally driven by a stocker drive motor 93 connected to the drive circuit 931 is arranged, and a screw rod 95 that integrally rotates is mounted coaxially on the gear 94. On the other hand, the plate 901 of the stocker 90 is provided with a nut 96 that is screwed with the screw rod 95, and the shaft of the nut 100 is mounted on the disk 100 on the carriage 40 housed in the stocker 90.
It is attached so as to be coaxial with the center hole 101 of the. The screw rod 95 is designed to have a slightly smaller diameter so that it can be inserted into the disc center hole 101. The lead of the screw rod 95 is set so as to move the stocker 90 up or down by one step, that is, by one carriage, every approximately half rotation. A spring 98 is wound around the screw rod 95 in a compressed state to constantly urge the stocker 90 upward. Further, the stocker 90 is stably supported on both sides thereof in a horizontal state by the pantograph type supporting mechanism 97.

In the above configuration, when the gear 94 is rotated counterclockwise in the drawing, the stocker 90 is gradually lowered against the spring 98 by the screw engagement of the screw rod 95 and the nut 96 that rotate integrally with the gear 94,
Along with this, the pantograph 97 gradually contracts. Gear 94
A pair of cutouts 116 are formed opposite to each other at the peripheral edge of the rotary plate 115 fixed on the upper side, and the detection element 117 provided on the bottom plate 4 detects the cutouts 116 approximately every half rotation of the gear 94. Detection element 117
In response to the rising of the output signal S117 from the motor 93, the motor 93 is stopped after applying a negative drive voltage so as to rotate the motor 93 in the reverse direction for a predetermined time (FIG. 15). By repeating this operation, the stocker 90 is lowered from the highest position (position 0) to the lowest position (position 6) (Fig. 10e). Carriage stored in the step with stocker 90
When the carriage 40 is pulled out or the carriage 40 is housed in a certain stage, the output signal S117 from the detection element 117 corresponding to the difference between the stage in the position where it can be pulled out / stored and the designated stage at that time. Upon receiving the start-up, the stocker 90 may be stopped. Motor 93 for raising and lowering stocker 90
The drive control for the detection element 117 and the switch S
The control circuit 6 receiving the signal from W1 sends out the up signal S61 or the down signal S62 according to the detection result, and the drive voltage S931 controlled in this way is given from the drive circuit 931 to the motor 93. (Fig. 19). The screw rod 95 is inserted into the center hole 101 of the disk 100 on the carriage 40 housed in the stocker 90 in a non-contact manner during the above-described raising / lowering operation of the stocker 90.

The nut 96 is a hole 902 formed in the bottom plate 901 of the stocker 90.
The small-diameter portion 961 is fitted to the bottom plate 9 and the large-diameter portions 962 and 963 are integrally formed on the upper and lower sides of the small-diameter portion 961 and have a large diameter.
It is rotatably attached to the bottom plate 901 while sandwiching 01. Then, the protrusion 965 provided at the tip of the extension portion 964 of the large diameter portion 963 on the lower side is configured to be engageable with any one of the plurality of holes 903 formed concentrically on the stocker bottom plate 901 over a substantially half circumference. (Fig. 10c). Since the rotation angle of the nut 96 changes depending on which of the holes 903 the protrusion 965 is engaged with, the height position of the stocker 90 can be finely adjusted.

As shown in FIGS. 1A to 1D, an extension 310 is formed in a guide member 31 fixed to one end of the tray 30.
On the other hand, on the side plate 2 of the chassis 1, there is fixed a switch SW5 which is turned on by the extension portion 310 at the eject position of the tray 30 shown in FIGS. 2a and 2b. Further, on the bottom plate 304 of the tray 30, in the state where the carriage 40 is placed, the disk placing portion 41 of the carriage, particularly 8 cm.
A through hole 308 corresponding to the through hole 48 formed in the disk mounting portion 41b is formed. On the other hand, as will be described later, the support plate 170 (FIGS. 4A to 4C) provided on the bottom plate 4 of the chassis 1 has through holes 308 in the tray 30 at the loading position.
Further, the reflection type detection element 110 is fixedly arranged at a position aligned with the through hole 48 of the carriage 40 placed on the tray. Tray 30 and carriage in loading position
When the disc 100 is placed on the 40, the detection element 110
The light emitted from the laser beam passes through the through holes 308 and 48 and reaches the back surface of the disk 100, and the reflected light passes through these through holes and is detected by the detection element, whereby the existence of the disk is confirmed. The presence / absence of the disc thus detected is displayed on the player display (not shown).

The detection element 110 has a function of detecting the presence or absence of a disc in a reproducible state in cooperation with the through holes 308 and 48 as described above, and further, the tray 30 when the tray 30 is pulled out from the loading position to the eject position. It is used as a timing sensor for detecting the intermediate position and decelerating the subsequent drawing movement speed. A reflecting member 37 such as silver paper is attached to the lower surface of the bottom plate 304 at the rear end of the tray 30 on the same straight line as the through hole 308 in the tray pull-out / accommodation direction. As mentioned above, tray lock arm
Shuttle through engagement of locking groove 72 of 70 and lock pin 32
When the tray 30 is pulled out to a position approximately in the middle between the loading position and the eject position in the tray pull-out movement that is carried out along with the movement of 50, the reflecting member 37 causes the detecting element 11 to move.
The position immediately above 0 is reached, and the position is detected by the detection element 110. As shown in the timing chart of FIG. 16, after the fall of the detection signal from the detection element 110,
By controlling the drive voltage S631 to be supplied to the motor 63 in a pulsed manner, the subsequent tray withdrawing speed is gradually reduced. When the tray 30 reaches the eject position, the switch SW5 is pushed by the extension portion 310 of the guide member 31 to be turned on, and the motor 63 is stopped in response to this. As shown in FIG. 19, the control of the motor 63 is performed by the control circuit 6 which receives the outputs S110 and S5 from the detection element 110 and the switch SW5, and outputs the up signal S63 corresponding to the detection results.
Alternatively, the down signal S64 is sent to the drive circuit 631, and the drive voltage S631 thus controlled is applied to the motor 63 from the drive circuit 631.

As shown in FIGS. 4a to 4c, a mechanical section 120 (hereinafter referred to as a mechanical unit 120) on which an optical head 113 for reproducing digital information recorded on a disc, a turntable 111, etc. are mounted, Tray 3 in loading position
It is arranged on the chassis 1 below 0 so that it can be moved up and down.
On the other hand, with the tray 30 in between, turntable 111
A clamper 112 is rotatably arranged above the tray 30 facing the. This clamper 112 is mounted on the side plate 2 of the chassis 1.
And 3 are rotatably supported by a substantially U-shaped clamp arm 5 whose both ends are fixed (Figs. 1a and 1d).
The up-and-down drive with respect to the mechanical unit 120 is performed by a pair of support plates 170 and 180 provided on the bottom plate 4 of the chassis 1 and a pair of slide plates 15 slidably supported in the CD direction in the drawing.
Through 0,160. That is, a pair of pins 121 and 122 protruding from both sides of the mechanical unit 120 are formed in the support plate 170; 180 in the vertical direction, and a pair of guide grooves 171, 172; 181, respectively.
182 (not shown) and slide plate 150; 1
The mechanical unit 120 is moved up and down by being engaged in the respective cam grooves 151, 152; 161, 162 in 60, and the pins being guided along the cam grooves as the slide plate moves. The state where the mechanical unit 120 stands by at the lowered position (standby position) is shown in FIGS. 4a to 4c, and the state in which the disc reproduction is possible at the raised position (mounting position) is shown in FIG. 5a and FIG. It is shown in FIG. 5b.

The cam grooves 151 and 152 of the slide plate 150 are formed in opposite directions to the cam grooves 161 and 162 of the slide plate 160.
Hereinafter, the cam groove will be described with respect to one slide plate 150. The cam grooves 151 and 152 are the moving directions of the slide plates (C-in the figure).
Slanted portions 151b and 152b inclined with respect to the D direction), first horizontal portions 151a and 152a continuous to the lower ends of the slanted portions 151b and 152b and parallel to the moving direction, and continuous to the upper ends of the slanted portions 151b and 152b, the moving direction A second horizontal portion 151c, 152c parallel to the. The slide plates 150 and 160 are connected to each other by an arm 128 that is rotatable around a pivot pin 127 that is planted on the bottom plate 4.

A rack 155 extending along the CD direction in the drawing is formed at the lower end of one slide plate 150, and a rack 155 is formed on the bottom plate 4.
A pinion 125 that meshes with is provided. Further, a motor 123 connected to a motor drive circuit 1231 is provided on the bottom plate 4, and the pinion 125 is connected to the motor 12 via a gear device 124.
Connected to 3.

Therefore, the mechanical unit 120 shown in FIGS.
When the motor 123 is rotated in a predetermined direction and the slide plate 150 is slid in the D direction in the drawing, the arm 128 is moved.
Is rotated counterclockwise, and the other slide plate 160 is translated in the direction C at the same speed. As a result, in the mechanical unit 120, the pins 121 and 122 of the mechanical unit 120 are both slide plates 150;
Guided by the cam grooves 151, 152; 161, 162 of 0, and moved up in parallel with the bottom plate 4, the lifted position (disc clamp position) shown in FIGS. 5a and 5b is obtained.

In the lowered position shown in FIG. 4a, the pins 121 and 122 of the mechanical unit 120 are connected to the first horizontal portion 1 of the cam grooves 151 and 152.
In the raised position shown in FIG. 5a, the second horizontal portions 151c, 152c are locked in the middle portions of the second horizontal portions 151c, 152c. A tray lock arm 130 is rotatably supported on a horizontal plane at the upper end of the support plate 170 supporting the slide plate 150 in the direction C in the drawing. The tray lock arm 130 is provided with an operating pin 138 capable of contacting a notch 158 formed in the upper end of the slide plate 150 on the C direction side in the drawing, and is biased counterclockwise in the drawing by a spring 131. The position of the stopper pin 137 is regulated while being in contact with the support plate 170. Further, a roller 132 is rotatably installed at the tip of the roller so as to face the lower surface of the tray 30. And this roller 132 is the tray 30
The tray 30 is held in a locked state with respect to the mechanical unit 120 (chassis 1) by engaging with the rib 38 formed on the lower surface of the tray. (Fig. 4c, Fig. 5b) Support plate
170 and the bottom plate 4 include a slide plate 150 and a mechanical unit 12
Switches SW2 and SW3 for detecting the 0 position are provided.

The switch SW2 is provided on the support plate 170 and has a slide plate 15
The pin 121, 122 is attached at a position where it can face the notch 154 formed in the upper surface 153 of 0, and the pins 121, 122 are positioned substantially in the middle of the second horizontal portions 151c, 152c of the cam grooves 151, 152, as shown in FIG. 5a. While the mechanical unit 120 is in the raised position, the slide plate 150 is moved in the direction C in the drawing and the mechanical unit 120 is being moved downward, so that the mechanical unit 120 opposes the notch 154 to be in the OFF state. Then, as shown in FIG. 4A, the pins 121 and 122 are connected to the first horizontal portion 151 of the cam grooves 151 and 152.
When the mechanical unit 120 is located at a substantially midway portion of the a and 152a and is in the lowered position, the mechanical unit 120 comes into contact with the upper surface 153 of the slide plate 150 to be in the ON state.

On the other hand, the switch SW3 is a slide plate 1 on the bottom plate 4.
It is attached at a position facing the notch 157 formed in the lower end extension 156 of the 50, and as shown in FIGS. 5a and 5b, the pins 121 and 122 have the second horizontal portions 151c and 152c of the cam grooves 151 and 152.
In a state in which the mechanical unit 120 is located at a substantially middle portion of the notch 157 and is in the raised position, the wall 157 of the notch 157 on the C direction side in the drawing is shown.
It turns on when it contacts a. In addition, the slide plate 150 is shown in FIG.
When the pins 121 and 122 are moved further from the position shown in FIG. 4c in the direction C, the first horizontal portions 151a and 152a of the cam grooves 151 and 152 are formed.
At the positions shown in FIGS. 6a and 6b where the end portions 151a ', 152a' of the notch 157 are brought into contact with the wall 157b of the notch 157 on the D direction side in the figure, the contact is turned on. And notches at other positions
It turns off in opposition to 157.

As shown in Fig. 19, the outputs of the above switches SW2 and SW3
S2 and S3 are connected to the control circuit 6, and the control circuit 6 outputs a control signal to the motor drive circuits 1231 and 631 based on the operation described in detail below.

The operation will be described below with reference to FIG. 17 as well. Now, when the mechanical unit 120 is at the raised position shown in FIGS. Operation), the control circuit 6 sets the down signal S66 to the “H” state, and the motor drive circuit 1
The drive voltage S1231 of the 231 is set to the negative output and the motor 123
Drive. As a result, the slide plate 150 is moved in the direction C in the drawing and the slide plate 160 is moved in the direction D in the drawing at the same speed. Since the slides 150 and 160 are substantially symmetrical in configuration and operation, only one slide plate 150 will be described below. The slide plates 150 are locked to the second horizontal portions 151c and 152c of the pair of cam grooves 151 and 152 formed in the slide plate 150. The pins 121 and 122 are guided along the inclined portions 151b and 152b of the cam grooves 151 and 152 with the movement of the slide plate 150 in the direction C in the figure, and the mechanical unit 120 is moved downward. In the initial stage of the movement of the slide plate 150 in the direction C in the drawing, the pins 121 and 122 pass through the second horizontal portions 151c and 152c,
Switch SW3 and notch 15
The contact with the wall 157a of 7 is released, and the output S3 of the switch SW3 becomes OF.
It becomes F state. When the pins 121 and 122 reach the first horizontal portions 151a and 152a of the cam grooves 151 and 152, the mechanical unit 120 moves to the fourth position.
It assumes the lowered position shown in Figures a-4c. In this lowered position, the switch SW2 leaves the notch 154 formed in the upper surface 153 of the slide plate 150 and comes into contact with the upper surface 153, so that the output S2 thereof is turned on. Tray in this position
30 is still locked, but slide plate
The notch 158 in 121 is the operating pin 138 of the tray lock arm 130.
Came close to.

From this position, the slide plate 150 has the pins 121 and 122 at the first position.
Of the horizontal portions 151a, 152a are moved in the direction C of the drawing until they come into contact with the ends 151a ', 152a' of the horizontal portions 151a, 152a to the unlocked position shown in FIGS. 6a and 6b. By moving during this time, the notch
The Lorey lock arm 130 is rotated clockwise in the drawing against the biasing force of the spring 131 via the engagement between the 158 and the operating pin 138, and the engagement between the roller 132 and the rib 38 is released. Thus, the locked state of the tray 30 with respect to the mechanical unit 120 (chassis 1) is released, and the shuttle 50 can be moved to the eject position as described above. Slide plate
When 150 reaches the unlocked position, the switch SW3 comes into contact with the wall 157b of the cutout 157, and the output S3 thereof is turned on again. When the output S3 of the switch SW3 is in the ON state, the control circuit 6 sets the down signal S66 to the “L” state, and the motor drive circuit 123
The drive voltage S1231 of 1 is set to zero, the motor 123 is stopped, and the slide plate 150 is stopped at the unlock position. Further, when the output S3 of the switch SW3 is in the ON state, the control circuit 6 sets the eject signal S63 in the "H" state and causes the drive voltage S631 of the motor drive circuit 631 to be a negative output. As a result, the pulley drive motor 63 is rotated, and the tray 30 is moved in the eject direction via the shuttle 50.

In the illustrated embodiment, the control circuit 6 includes a switch SW3.
Output S3 is turned on again, that is, slide plate 15
0 reaches the unlocked position for a predetermined time, for example 100
After msec, the up signal S65 is set to the "H" state, the drive voltage S1231 of the motor drive circuit 1231 is made a positive output, and the slide plate 150 is moved in the D direction in the figure. Slide plate 150 is the fourth
When the switch SW3 is moved away from the wall 157b of the cutout 157 and its output S3 is turned off again as shown in FIGS. A and 4c, the control circuit 6 sets the up signal S65 to the "L" state,
The drive voltage S1231 of the motor drive circuit 1231 is set to zero and the slide plate 150 is stopped at the position shown in FIG. 4a. Thus, as shown in FIG. 7, the tray lock arm 13
0 indicates that the stopper pin 137 is the support plate 1 due to the biasing force of the spring 131.
It is rotated counterclockwise in the drawing until it engages with 70, and is held in a standby state so that the ribs 38 of the tray 30 that is loaded next from the eject position are automatically locked by the rollers 132. That is, when the loading switch is pressed at the eject position of the tray 30 shown in FIGS. 2a and 2b, the control circuit 6 sets the loading signal S64 to the "H" state, and the drive voltage S631 of the motor drive circuit 631 is increased. Let it be output. As a result, the pulley drive motor 63 is rotated,
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 FIGS. 1a and 1c, and the switch SW4 described above is turned on.
In the N state, the control circuit 6 sets the loading signal S64 to the "L" state, sets the drive voltage S631 of the motor drive circuit 631 to zero, and stops the tray 30 at the loading position. When the tray 30 is moved to the position shown in FIG. 7 during the movement of the tray 30 and is further moved in the storing direction, the tray lock arm 130 causes the roller 132 to abut on the rib 38 so that the spring is moved. When the tray 132 is rotated clockwise against the urging force of the 131 and the roller 132 is engaged with the concave portion of the rib 38 in the loading position of the tray 30 shown in FIG. 4c, the tray 30 is automatically moved to the loading position. Locked. Therefore, according to this embodiment, the tray 30 is locked in the loading position at the same time when it reaches the loading position.

Unlike the above embodiment, the slide lock arm 131 releases the lock to the tray 30 to bring the slide 15 into the unlocked state shown in FIGS. 6a and 6b.
It is also possible to hold the 0 position in this state. In this case, as shown in the timing chart of FIG. 18, the control circuit 6 operates in the same manner as in the above-mentioned embodiment.
The output S3 of the switch SW3 is O at the positions shown in FIGS. 6a and 6b.
When the N state is reached, the down signal S66 is set to the "L" state, and the drive voltage S1231 of the motor drive circuit 1231 is set to zero. However, the down signal S66 is kept down until the loading switch is pressed and the tray 30 is moved to the loading position. Keep signal S66 in "L" state. Then, at the time of loading, the control circuit 6
Switches the output S4 of the switch SW4 to the ON state to set the loading signal S64 to the “L” state to stop the tray 30 at the loading position, set the up signal S65 to the “H” state, and set the drive voltage S1231 of the motor drive circuit 1231 to the high level. A positive output is made and the slide plate 150 is moved in the direction D in the figure. When the slide plate 150 is moved to the position shown in FIGS. 4a and 4c, the switch SW3 is separated from the wall 157b of the cutout 157, and the output S3 thereof is turned off again, the control circuit 6 outputs the up signal S65. Set to "L" state and drive voltage S of motor drive circuit 1231
The slide plate 150 is stopped at the position shown in FIG. Therefore, even with this configuration, the tray
The 30 can be locked in the loading position.

<Effects of the Invention> According to the present invention, a tray for detecting the presence / absence of a disc and decelerating the movement at the time of ejection of the tray by one light reflection type detection element without extending the length of the tray more than necessary. The predetermined withdrawal position detection of is achieved.
The present invention can be suitably employed particularly in a stocker system disk player based on a novel idea proposed by the applicant in Japanese Patent Application No. 1-290771.

[Brief description of drawings]

1a to 1d show the structure of a compact disc player to which a preferred embodiment of the present invention is applied, in which the tray is in the loading position and the mechanical unit is in the standby position. The front view, the side view, the plan view and the sectional view taken along the line aa in FIG. 1c, FIG. 2a and FIG. 2b are the side view and the plan view showing the state in which the tray is in the eject position, FIG. FIG. 3b is a side view and a plan view showing a state where all the carriages are stored in the stocker, and FIGS. 4a to 4c are side views showing the lifting device especially when the mechanical unit is in the standby position. Figure, front view and plan view, Figure 5a and Figure 5b are side and plan views showing the lifting device especially when the mechanical unit is in the operating position, and Figures 6a and 6b are trays. In the locking device against FIG. 7 is a side view and a plan view showing a state in which the lock for the tray is released, FIG. 7 is a plan view showing a state in which the lock device for the tray has returned to the lock standby position, and FIGS. 8a to 8e are tray loading devices. FIG. 2 is an enlarged view of the details of FIG.
Is a sectional view taken along line b-b in FIG. A, FIG. C is a sectional view taken along line c-c in FIG. A, and FIG. D is a sectional view showing a part of FIG. FIG. E is a sectional view similar to FIG. B showing a state where the tray is pulled out to the eject position, and FIGS. 9a to 9c are enlarged partial front views showing details of the drive mechanism of the tray and the carriage by the shuttle, Side view and plan view, FIGS. 10a to 10e show details of the stocker and its lifting device, and FIGS. A to d are front view, side view and plan view of the stocker in the highest position. D and d in the figure and FIG.
Sectional view, the same figure e is a sectional view similar to the same figure d in the state where the stocker is at the lowest position, and FIGS. 11a to 11d are enlarged side views showing the shuttle-related parts in the drive mechanism of the tray and carriage, 12a to 12c are front views showing the structure of the carriage,
FIG. 13 is a side perspective view and a plan view, FIG. 13 is an enlarged partial perspective view showing a state where the carriage is housed in the stocker, and FIGS. 14a and 14b are trays in the shuttle drive mechanism for driving the tray and the carriage. Partial side view and plan view showing the state where the engagement is released and only the carriage is driven. Fig. 15 is a timing chart showing the raising / lowering operation of the stocker. Fig. 16 is a timing showing the ejecting operation from the loading position of the tray. FIG. 17 is a timing chart showing a tray ejecting operation and a loading operation which are performed in conjunction with the mechanical base ascending / descending. FIG. 18 is a timing chart showing a tray ejecting operation and a loading operation in another embodiment. FIG. 3 is a block diagram showing a control system for each drive motor. Explanation of code 1 …… Chassis (player body), 30 …… Tray, 36…
… Through hole, 37 …… Reflecting member, 40 …… Carriage, 48 …… Through hole, 50 …… Shuttle, 70 …… Tray lock arm, 80
...... Carriage lock arm, 90 ...... Stocker, 100
...... Disk, 110 …… Detector

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A 61-45465 (JP, A) JP-A 61-240476 (JP, A) JP-A 1-118262 (JP, A) JP-A 63- 113974 (JP, A) Actually open 59-177061 (JP, U) Actually open 62-7672 (JP, U) Actually open 59-157266 (JP, U) Actually open Flat 2-12759 (JP, U) Actual flat 2-35356 (JP, U) Actual flat 2-84160 (JP, U) Actual flat 2-84161 (JP, U)

Claims (2)

(57) [Claims] 1. A tray for directly or indirectly mounting a disc is housed in a player body and reciprocally movable between a loading position where the disc can be reproduced and an eject position where the disc is pulled out from the player body. In the present disc player, at the loading position of the tray, a light reflection type detection element arranged below the tray to detect the presence or absence of a disc placed on the tray, a loading position and an ejecting position of the tray. A light reflecting member disposed at a lower surface portion of the tray facing the light reflecting type detecting element at a substantially middle position of the tray, in order to detect a substantially middle position between the tray and the tray. When moving from the loading position to the eject position of the In response to detection of a substantially intermediate position, and having a a tray movement speed control means for decelerating the subsequent tray movement speed, the disc player. 2. A light-reflective type carriage is mounted on the tray and the carriage in a state where a carriage on which the disc can be mounted is mounted on the tray and the carriage is mounted on the tray at the loading position. The disc player according to claim 1, wherein each of the openings is formed to allow detection light from the detection element to pass therethrough.