JPH04302849A - Driving mechanism for disk player - Google Patents

Abstract

PURPOSE:To surely prevent a mulfunction by providing a safely mechanism permitting the action of a mechanism chassis elevating/lowering only when a disk table is in the normal attitude of a rotation angle. CONSTITUTION:In accordance with the rotation of the disk table, then, the moving of a cam part, the cam follower 88 of a lever mechanism is driven. When the disk table is in the normal attitude of the rotation angle, the rocking control part 87 of the mechanism is retreated from the rocking area of an oscillating gear mechanism 8 to permit the rocking of the oscillating gear mechanism 8 to the mechanism chassis elevating/lowering mechanism 5 side. Further, when the disk table is in the abnormal attitude of the rotation angle, the rocking control part 87 of the lever mechanism is advanced to the rocking area of the oscillating gear mechanism 8 to prevent the rocking of the oscillating gear mechanism 8 to the mechanism chassis elevating/lowering mechanism 5 side.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-disc player that can accommodate a plurality of discs and play these discs selectively or continuously.

0002

[Prior Art] This type of multi-disc player has a tray chassis installed in a cabinet so that it can be moved back and forth in the horizontal direction. A disk table is rotatably supported, and the disk table is driven by a rotation mechanism, and by rotation of the disk table, an arbitrary disk mounting section is moved to a predetermined position for signal reproduction. Moreover, a mechanism chassis equipped with a pickup device is supported on the tray chassis so that it can be raised and lowered,
An elevating mechanism is connected to the mechanism chassis, and by elevating and lowering the mechanism chassis, the disks on the disk mounting section are clamped and released (Japanese Patent Application Laid-Open No. 1986-62).
-192062).

0003

[Problem to be Solved by the Invention] When clamping a disc on a disc table, the disc table must be rotated to a normal angular position for signal reproduction, and the pickup on the mechanism chassis must be inserted through a window provided in the disc table. exposed, and in this state raise the mechanism chassis from the lower end. As a result, the pickup emerges upward through the window of the disc table and rises to a position where it focuses on the disc signal surface. However, in the above-mentioned disc player, the rotation mechanism of the disc table and the elevating mechanism of the mechanism chassis are constructed separately and can operate independently, and both mechanisms are controlled by an electric circuit. If a problem occurs, there is a possibility that the mechanism chassis lifting mechanism will operate without the disk table being in the normal rotational angle position. In this state, when the mechanism chassis rises from the lower end, the pickup on the mechanism chassis will collide with the back surface of the disk table.

An object of the present invention is to provide a disc player that can reliably prevent the above-mentioned malfunctions by providing a safety mechanism that allows the mechanism chassis lifting mechanism to operate only when the disc table is in a normal rotation angle posture. The purpose of the present invention is to provide a drive mechanism for the following.

[0005]

[Means for Solving the Problems] The drive mechanism of the disc player according to the present invention includes a mechanism chassis elevating mechanism (5).
and a motor (70) that serves as a common power source for the disk table rotation mechanism (6), and is driven by the motor (70) and oscillates by switching the rotational direction of the motor to rotate the mechanism chassis lifting mechanism (5) and the disk table rotation mechanism (6). an oscillating gear mechanism (8) that selectively engages one of the disk table rotation mechanisms (6) and transmits power to the other mechanism;
A cam follower (88) is formed at one end, and a swing regulating part (87) extending toward the swing area on the mechanism chassis lifting mechanism side of the oscillating gear mechanism (8) is formed at the other end. It includes a protruding lever mechanism and a cam portion (27) formed on the back surface of the disc table (2), with which a cam follower (88) of the lever mechanism engages. Further, the cam portion (27) is connected to the disk table (2
) is in the normal rotational angle posture with the disc mounting part (21) set at the predetermined position, the swing regulating part (87) of the lever mechanism is moved out of the swing area, and the disc table (2) The lever mechanism is formed in a cam curve that causes the swing restricting portion (87) of the lever mechanism to enter the swing region when the lever mechanism is not in the normal rotation angle position.

[0006]

[Operation] When the motor (70) rotates in one direction, the oscillating gear mechanism (8) swings toward the disk table rotation mechanism (6) and engages with the mechanism (6), causing the motor to rotate. It is transmitted to the disk table (2). As a result, the disc table (2) rotates, and a plurality of disc mounts (2)
1) It periodically passes through the normal rotation angle posture and the incorrect rotation angle posture, and finally stops at the normal rotation angle posture in normal operation. Disc table (2)
The cam follower (88) of the lever mechanism is driven by the rotation of the cam part (27), and when the disk table (2) assumes the normal rotation angle posture, the swinging of the lever mechanism is restricted. Part (87) is the swing gear mechanism (8)
The swinging gear mechanism (8) is allowed to swing toward the mechanism chassis lifting mechanism (5). Furthermore, when the disc table (2) assumes an incorrect rotational angle posture, the swing regulating portion (87) of the lever mechanism enters the swing area of the swing gear mechanism (8), and the swing gear mechanism (
8) Prevents the mechanism from swinging toward the chassis lifting mechanism (5). Therefore, when the motor (70) is reversed while the disc table (2) is in the normal rotation angle position, the oscillating gear mechanism (8) swings toward the mechanism chassis lifting mechanism (5). Engaged with the mechanism (5), the power of the motor is transmitted to the mechanism chassis (12). As a result, the mechanism chassis (12) rises from the lower end, and disk clamping is performed. On the other hand, even if the motor (70) reverses in a state where the disc table (2) has an incorrect rotational angle posture, the swinging gear mechanism (8) will not be able to control the swinging regulation part (87) of the lever mechanism. )
At this time, the mechanism is prevented from engaging with the chassis lifting mechanism (5). Therefore, in this state, the mechanism chassis (12) is not driven up or down.

[0007]

According to the drive mechanism of the disc player according to the present invention, since the operation of the oscillating gear mechanism is mechanically controlled by the lever mechanism, it is possible to prevent the mechanical chassis elevating mechanism from occurring due to electrical troubles, for example. Malfunctions are reliably prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which the present invention is implemented in a compact disc player will be described below. It should be noted that the examples are for illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing its scope.

[Overall configuration] As shown in FIG. 1, on a base chassis (1) fixed in a flat cabinet (150),
A tray chassis (11) is arranged so as to be able to reciprocate in the horizontal direction, and on the tray chassis (11) is a rotating disk-shaped disk table (2) in which four disk mounting sections (21) are arranged in a circle. Possibly supported.

As will be described later, the tray chassis (11) moves the two disk mounting sections (21) into the cabinet (150) by driving a tray chassis reciprocating mechanism interposed between the base chassis (1) and the tray chassis (11) as shown in the figure. It reciprocates in the horizontal direction between an open position in which all the disc mounting parts (21) are exposed and a closed position in which all the disc mounting parts (21) are housed in the cabinet (150).

As shown in FIG. 2, a mechanism chassis (12) is disposed on the tray chassis (11) so as to be movable up and down.
A first motor (12) is mounted on the mechanism chassis (12).
1) A turntable (120) rotationally driven by
A pickup device is equipped with an optical pickup (111) for signal reproduction, and a pickup transport mechanism (112) for moving the pickup (111) in the disk radial direction by driving a second motor (113). (110) is deployed. The mechanism chassis (12) is driven up and down by a mechanism chassis lifting mechanism which will be described later. Moreover, on the tray chassis (11), there is a disk mounting part (21) of the disk table (2).
A magnetic disc clamping mechanism (100) is provided with a clamper (101) for clamping the upper disc to the turntable (120).

The disc table (2) has a turntable (12) corresponding to the four disc mounting parts (21).
0) and 4 for bringing out the pickup (111)
Two openings (22) are provided. Furthermore, between the tray chassis (11) and the disk table (2), there is a
A disk table rotation mechanism (6) for rotationally driving the disk table (2) is interposed as shown in FIG. The above mechanism chassis lifting mechanism and disk table rotation mechanism are as follows:
Using the third motor (70) shown in FIG. 4 as a common power source,
It is switched and driven as described below.

As mentioned above, the tray chassis (11) includes:
Since all the mechanisms for signal reproduction are equipped, not only the tray chassis (11) is installed in the closed position as shown in Figure 5, but also the tray chassis (11) is installed in the closed position as shown in Figure 4.
11) is installed in the open position, signal reproduction is possible. In addition, by moving the tray chassis (11) from the closed position to the open position, the two disk mounting parts (21) are exposed from the cabinet (150), so as shown in FIGS. 17(a), (b), and (c). By repeating the disk exchange operation shown twice, all disks on the disk table (2) can be exchanged.

[Tray chassis reciprocating mechanism (3)] As shown in FIG. 2, on the base chassis (1), there is a connecting shaft (33) extending perpendicularly to the tray chassis movement direction at the end of the tray chassis discharge side. The connecting shaft (33) is rotatably constructed, and a gear (34) and a roller (35) are fixed to both ends of the connecting shaft (33), respectively. On the other hand, as shown in Fig. 3, the tray chassis (11) has a pair of left and right wheels (36) (36) projecting downward from the end on the tray chassis storage side, and rides on the top surface of the base chassis (1). . Further, the gears (3) are provided on both sides of the tray chassis (11), respectively.
4) a rack (14) meshing with the roller (35);
A groove (15) that engages with the tray chassis is formed in the direction of movement of the tray chassis. As a result, the tray chassis (11) is guided and supported on the base chassis (1) so as to be able to reciprocate.

Furthermore, as shown in FIGS. 2 to 6, a rack plate (41) extending long in the reciprocating direction of the tray chassis (11) is fixed on the base chassis (1), and the rack plate (41) A stepped groove (43) having a length corresponding to the moving distance of the tray chassis (11) is provided in the tray chassis (11), and a rack (42) is formed in the upper half of the groove.

On the other hand, the tray chassis (11) includes a drive pinion (31) to mesh with the rack (42) of the rack plate (41), and a fourth motor (30) for driving the drive pinion (31). ) and a speed reduction mechanism (37) are provided. At the lower end of the pivot of the drive pinion (31),
The roller (3) fits into the groove (43) of the rack plate (41).
2) is installed.

Therefore, when the drive pinion (31) is rotated in the forward and reverse directions by the drive of the fourth motor (30), the tray chassis (11) is moved to the closed position due to the engagement between the drive pinion (31) and the rack (42). and the open position. Furthermore, when the tray chassis (11) reaches the closed position or the open position, the roller (32)
comes into contact with the wall end of the groove (43) of the rack plate (41), and the driving pinion (31) and the rack (42) are disengaged from each other.

[Tray chassis lock mechanism (4) (40
)] In order to lock the tray chassis (11) in the closed position and the open position, the base chassis (1
) As shown in FIGS. 6 to 8, tray chassis locking mechanisms (4) and (40) are provided on the tray chassis locking mechanism (4) (40). Each tray chassis locking mechanism (4) (40) includes fan-shaped gears (44) (45) mounted on the rack plate (41), and springs (38) (39) that bias these fan-shaped gears to rotate. Equipped with
The tooth surfaces of the sector gears (44) and (45) are connected to the rack plate (41).
It is formed so as to be continuous with the rack tooth surface.

When the tray chassis (11) has reached the open position as shown in FIG. 4, the drive pinion (31) remains connected to the fourth motor (30) even after it is disengaged from the rack (42).
is further rotated by a certain angle, and as shown in FIG. 7, it meshes with the fan-shaped gear (45) and rotates the fan-shaped gear (45) clockwise. This allows the fan-shaped gear (45
) comes out to the groove (43) side, and the drive pinion (3
1), and the tray chassis (11) is locked in the open position. Similarly, when the tray chassis (11) reaches the closed position as shown in FIG. 5, the drive pinion (31) starts meshing with the sector gear (44) immediately after disengaging from the rack (42). , Figure 8
Rotate the fan-shaped gear (44) counterclockwise as shown in FIG. As a result, the end of the fan-shaped gear (44) comes out toward the groove (43), restricting movement of the drive pinion (31), and locking the tray chassis (11) in the closed position.

[0020] To unlock the tray chassis (11),
The open position is effected by clockwise rotation of the drive pinion (31), and the closed position is effected by counterclockwise rotation of the drive pinion (31).

[Mechanism chassis lifting mechanism (5)] As shown in FIG. 9, the mechanism chassis (12) is installed in the opening formed in the tray chassis (11), and the mechanism chassis (12) is installed in the opening formed in the tray chassis (11). A pair of axes (
51) (51) are provided, and these shafts are pivotally supported on the tray chassis (11) to support the mechanism chassis (12) so as to be movable up and down. Moreover, the mechanism chassis (12) is a tray chassis (
11) is biased in the upward direction by a spring (53) stretched between the two. Furthermore, the mechanism chassis (12
) has a driven pin (52) protrudingly provided at a position closer to the free end than the shaft (51).

The sub-chassis (10) is arranged downwardly away from the back surface of the tray chassis (11) and is fixed to the tray chassis (11). The subchassis (10
) is attached with a driving rotating body (74) that is rotationally driven by the power from the third motor (70), and a first cam portion (76) formed downward on the driving rotating body (74).
The driven pin (52) of the mechanism chassis (12) is brought into sliding contact with the mechanism chassis (12), and the mechanism chassis (12) is driven up and down by counterclockwise rotation of the first cam part (76).

At the lower end of the mechanism chassis (12), the turntable (120) and the pickup (1
11) is withdrawn downward from the rotation area of the disk table (2), allowing rotation of the disk table (2). As the mechanism chassis (12) rises, the turntable (120) lifts up the disk on the disk table (2) and places the disk in the disk clamp mechanism (
100) and the tray chassis (11) reaches the rising end, disk clamping with a predetermined clamping force is completed.

[Disc table rotation mechanism (6)] The disc table (2) has a boss (200) formed in the center as shown in FIG.
) penetrates and is supported for free rotation. On the back side of the disk table (2), as shown in FIG. 11, there is a rack (
26) is provided protrudingly, and the outer peripheral wall (23) and the rack (26)
is housed in an annular recess (13) formed in the tray chassis (11) as shown in FIG.

[0025] The tray chassis (11) has an annular recess (
A drive pinion (61) with a tooth surface protruding from the disk table (2) is provided.
) is always engaged with the rack (26). Therefore, the rotation of the drive pinion (61) causes the disc table (2
) will be rotationally driven. The drive pinion (61) is formed integrally with a driven gear (62) disposed on the sub-chassis (10) as shown in FIG.
The disk table (2) is driven by transmitting the rotation of the third motor (70) to the third motor (70).

[Driving mechanism (7)] The rotation of the third motor (70) is controlled by the driving rotating body (74) and the driven gear (62).
on the subchassis (10) for switching transmission to the
Swing gear mechanism (
8) will be deployed. The oscillating gear mechanism (8) includes a driving gear (81), a swinging plate (84) that is swingable about a support shaft of the driving gear (81), and a swinging plate (84) that is free to swing. A swinging large-diameter gear (82) attached to the end, a swinging small-diameter gear (83) integrally formed with the swinging large-diameter gear (82), a swinging large-diameter gear (82), and a swinging large-diameter gear (82). It is composed of a well-known friction mechanism (not shown) that provides resistance to the rotation of the small diameter gear (83), and the driving gear (81) is always in mesh with the large diameter oscillating gear (82). In addition, the large-diameter oscillating gear (82) is in a position where it can mesh with the driven gear (62).
The small diameter oscillating gear (83) is provided at a position where it can mesh with a driven gear (75) formed on the driving rotating body (74). The driving gear (81) and the third motor (70) are connected by a belt transmission mechanism including a small diameter pulley (71), a belt (72), and a large diameter pulley (73).

Therefore, as the third motor (70) rotates clockwise, the oscillating gear mechanism (8) oscillates clockwise, and the large-diameter oscillating gear (82) rotates in the driven gear (62).
), which causes the drive pinion (61) to rotate clockwise. As a result, the disk table (2) is rotated clockwise. Third motor (7
0) rotates counterclockwise, the oscillating gear mechanism (
8) swings counterclockwise, and the small diameter oscillating gear (83)
meshes with the driven gear (75) of the driving rotor (74), thereby rotating the first cam portion (76) counterclockwise,
The mechanism chassis (12) will be driven up and down.

[Mechanism Chassis Elevation Regulation Mechanism] In normal operation, the rotation of the disc table (2) is caused by the rotation of the turntable (120) and pickup (on the mechanism chassis (12)) from the opening (22) of the disc table (2). The mechanical chassis (111) is stopped at a normal rotation angle posture exposing the mechanism chassis (111), and in this state, the mechanism chassis (12) is raised and lowered. However, for some reason, the mechanism chassis (1) was placed with the disc table (2) set in an incorrect rotation angle position than the normal rotation angle position.
2) is driven up and down, the turntable (120) or pickup (111) moves up and down the disc table (2).
will collide with. Therefore, the disk table (2
) is in an incorrect rotation angle posture, a mechanism chassis elevation regulating mechanism is provided to mechanically prevent the oscillating gear mechanism (8) from approaching the driving rotating body (74).

As shown in FIG. 9, the first
A lever (86) is rotatably supported, and the first lever (86) is rotatably supported.
A swing regulating part (87) that can come into contact with the swing plate (84) of the swing gear mechanism (8) is formed at one free end of the swing gear mechanism (8), and a cam follower (87) is formed at the other free end of the swing gear mechanism (8). 88) is provided to protrude upward. The cam follower (88) is shown in FIG.
It passes through the opening (19) of the tray chassis (11) and extends toward the back surface of the disk table (2). The first lever (86) is urged counterclockwise by a spring (89). On the other hand, on the back surface of the disc table (2), as shown in FIG. 11, V-shaped positive cam portions (27) are protruded at four locations at angular intervals of 45 degrees.

When the disk table (2) is in an incorrect rotation angle posture as shown in FIG.
The cam portion (27) of 2) and the cam follower (88) of the first lever (86) are separated. In this state, the first lever (86) rotates counterclockwise under the bias of the spring (89), and the cam follower (88)
1) is in contact with the edge of the opening (19). As a result, the swing regulating portion (87) of the first lever (86) is rotated by the swing gear mechanism (
8) into the swinging area of the swinging plate (84) and moving the swinging plate (
84) toward the driving rotating body (74), that is, the swinging small diameter gear (83) of the swinging gear mechanism (8) and the driving rotating body (
74) is prevented from meshing with the driven gear (75).

When the disk table (2) rotates to the normal rotational angle posture as shown in FIG.
The cam part (27) of 2) drives the cam follower (88) of the first lever (86), and the first lever (86) is moved by the spring (
89) in a clockwise direction. by this,
The swing regulating portion (87) of the first lever (86) moves out of the swing area of the swing plate (84) of the swing gear mechanism (8),
This allows the oscillating gear mechanism (8) to approach the driving rotating body (74) side.

[Disc table rotation regulating mechanism] When the oscillating gear mechanism (8) swings counterclockwise as described above,
The large-diameter oscillating gear (82) and the driven gear (62) are disengaged, and the disk table (2) is free to rotate. For example, if the disc table (2) rotates in the play mode, it will interfere with the signal reproduction operation. Therefore, in order to mechanically prevent the rotation of the disc table (2) while the mechanism chassis (12) is moving up and down and in the play mode,
Equipped with a disc table rotation regulation mechanism.

As shown in FIG. 10, the second lever (
9) and the third lever (95) are rotatably supported, and the slide plate (50) is movable back and forth on guide pins (161) and (162) protruding from the back surface of the tray chassis (11). It is installed. Also, the driving rotating body (74)
, a second cam part (77) is integrally formed under the driven gear (75), and the back surface of the second cam part (77) has a shape shown in FIG.
An annular cam groove (78) having a small diameter cam groove part (79) and a large diameter cam groove part (80) with a phase difference of 180 degrees is recessed as shown in FIG. In addition, the small diameter cam groove part (79) and the large diameter cam groove part (80) are
Both cam grooves are connected by a circumferential cam groove having an intermediate radius.

As shown in FIG. 10, a cam follower (91) is provided protruding from one free end of the second lever (9), and the cam follower (91) is inserted into the notch (16) provided in the sub-chassis (10). The second cam portion (
77) into the cam groove. Also, the second lever (9)
A pin (92) is provided protruding from the other free end of the pin (92).
92) is engaged with a window (55) formed in the slide plate (50). Second lever (9) and slide plate (50)
A spring (93) is tensioned between them to urge the slide plate (50) away from the third lever (95).

A pin (96) is provided at one free end of the third lever (95) to project downward, and the pin (96) has a triangular shape projecting from the end in the sliding direction of the slide plate (50). into sliding contact with the end face of the cam piece (59). Further, an arc-shaped rotation regulating piece (9) is attached to the other free end of the third lever (95).
7) is provided to protrude upward, and the rotation regulating piece (97) is passed through the opening (19) of the tray chassis (11).
Make it face the back side of the disc table (2). The third lever (95) is urged to rotate clockwise by a spring (98) stretched between the third lever (95) and the tray chassis (11).

On the other hand, on the back side of the disc table (2), as shown in FIG. 11, there is an inner peripheral wall (
28), and four notches (29) are formed in the inner circumferential wall (28) at angular intervals of 90 degrees.

FIG. 13 shows that the mechanism chassis (12) is moved by the operation of the mechanism chassis lifting mechanism (5).
is held at the lower end, and in this state, the cam follower (91) of the second lever (9) engages the small diameter cam groove (
79), and the second lever (9) is held at the counterclockwise rotation end. The pin of the second lever (9) (
92), the slide plate (50) is moved by the spring (92).
3) is moving toward the third lever (95).

The pin (96) of the third lever (95) is pressed by the cam piece (59) of the slide plate (50), and the third lever (95) moves counterclockwise against the spring (98). is held at the rotating end. As a result, the rotation regulating piece (97) of the third lever (95) moves inward from the inner circumferential wall (28) of the disc table (2), and the notch (
29).

By rotating the driving rotating body (74) counterclockwise from the state shown in FIG. 13, the mechanism chassis (
12) is being driven upward, the second
The second lever (9) is slightly rotated clockwise by driving the cam portion (77). Along with this, a slide plate (5
0) moves in a direction away from the third lever (95), and the third lever (95) is rotated clockwise by the bias of the spring (98). As a result, the rotation regulating piece (97) of the third lever (95) is
8) into the notch (29) and remove the disc table (2).
) is prevented from rotating.

FIG. 15 shows a state in which the mechanism chassis (12) is installed at the rising end and disk clamping is completed, and in this state, the rotation of the driving rotary body (74) causes the second lever (9) to cam follower (91)
is engaged with the large-diameter cam groove (80) of the second cam portion (77), thereby holding the second lever (9) at the clockwise rotation end. The slide plate (50) further moves away from the third lever (95), and accordingly, the third lever (95)
is rotated clockwise to the rotation end, and the rotation regulating piece (97) is inserted into the notch (2) of the inner circumferential wall (28) of the disc table (2).
Go deeper into 9). Therefore, rotation of the disk table (2) is reliably prevented while the mechanism chassis (12) is being raised and lowered and in the play mode.

After playing the disc, the disc table (2
) to replace the disk, the driving rotating body (74) is further rotated counterclockwise by the drive of the third motor (70). This allows the second lever (9) to
rotates counterclockwise, the slide plate (50) moves toward the third lever (95), and the third lever (95) is driven by the cam piece (59) of the slide plate (50) and rotates counterclockwise. Rotate clockwise and finally the mechanism chassis (12)
When the lever reaches the lowering end, the third lever (
The rotation regulating piece (97) of the disc table (2)
The disc table (2) is allowed to rotate by separating from the notch (29) in the inner circumferential wall (28) of the disc table (2).

[Mechanism Chassis Reception Mechanism] When taking out all the discs on the disc table (2) and carrying the disc player, the mechanism chassis (12
) is installed at the rising end by the drive of the driving rotating body (74) shown in FIG. At this time, the mechanism chassis (1
2) is urged in the upward direction by the spring (53) shown in FIG. It is held at the rising end by the urging force of 53). In this state, the driven pin (52) of the mechanism chassis (12) is connected to the driven gear (75) of the driving rotor (74) and the first cam portion (7).
It is possible to move up and down within a margin between 6) and 6).

Therefore, for example, if the device is accidentally dropped while being carried, a large impact force will be applied to the mechanism chassis (12), causing the mechanism chassis (12) to drop rapidly within its movable range and reach the lower end. There is a risk of damaging the pickup device in the event of a collision. Therefore, in order to reliably receive the mechanism chassis (12) at the rising end position in the state shown in FIG. 15, a mechanism chassis receiving mechanism is provided.

As shown in FIG. 10, the mechanism chassis (12
) has first and second projecting pieces (17) (18) on the free end side.
) to form. On the other hand, first and second receiving pieces (56) and (57) are provided on the slide plate (50) in a manner corresponding to the first and second protruding pieces (17) and (18).

Mechanism chassis (12) as shown in Figure 13
is installed at the lowering end, and when the mechanism chassis (12) is being raised and lowered as shown in FIG.
) and the first and second receiving pieces (56) of the slide plate (50).
) (57) are in a positional relationship that does not overlap with each other,
The mechanism chassis (12) can be moved up and down freely.

As shown in FIG. 15, the slide plate (50)
When the mechanism chassis (12) moves in the direction away from the lever (95) and reaches the rising end, the slide plate (5
The ends of the first and second receiving pieces (56, 57) of the mechanism chassis (12) are inserted under the first and second projecting pieces (17, 18) of the mechanism chassis (12), respectively. 12) Move to the position to catch the descent. In this state, even if an impact force is applied to the mechanism chassis (12), the mechanism chassis (12) will be held securely by the first and second receiving pieces (56) and (57) of the slide plate (50). Damage to the pickup device (110) due to impact is avoided.

[Various Detection Mechanisms] As shown in FIG. 12, a first switch (131) is installed on the mechanism chassis (12) in order to detect the moving end of the pickup (111) on the inner circumference side of the disk. The first switch (131)
is turned on and off by the end of the base on which the pickup (111) is mounted.

[0048] Also, the tray chassis (11) is shown in Fig. 13.
As shown in the figure, a second switch (132) for detecting a state in which the mechanism chassis (12) has reached the rising end;
A third switch (133) is arranged to detect when the mechanism chassis (12) has reached the lower end. In order to turn these switches on and off, use the slide plate (5
0), a pressing piece (58) is provided protrudingly. Therefore, the disk clamp completion state (FIG. 15) is detected by the ON signal from the second switch (132), and the third switch (132)
The disk clamp release state (FIG. 13) is detected by the ON signal from 3).

As shown in FIGS. 7 and 8, the tray chassis (11) has a fourth switch (134) for detecting the deceleration position when the tray chassis is open, and a fourth switch (134) for detecting the deceleration position when the tray chassis is closed. A fifth switch (135) for detecting the tray chassis stop position, and a sixth switch (136) for detecting the tray chassis stop position are arranged. In order to turn on and off the fourth switch (134) and the fifth switch (135), as shown in FIG.
A pair of side plates (48) (49) on the upper rack plate (41)
will be erected. Further, in order to turn on and off the sixth switch (136), a fan-shaped gear (44) constituting the tray chassis locking mechanism (4) in the tray chassis closed position is used.
), a first pin (46) is provided protrudingly, and a second pin (47) is provided on a fan-shaped gear (45) constituting the tray chassis locking mechanism (40) in the tray chassis open position. It is installed protrudingly.

When the tray chassis (11) is locked in the open position as shown in FIG. 7, the clockwise rotation of the sector gear (45) causes the second pin (47) on the sector gear (45) to move to the second position. 6 switch (136) is turned on. Furthermore, when the tray chassis (11) is locked in the closed position as shown in FIG. 8, the first pin (46) on the sector gear (44) is moved to the 6 switch (136) is turned on.

FIGS. 27 and 28 show changes in the voltage applied to the fourth motor (30) and motor rotational speed based on the ON and OFF signals from the fourth to sixth switches (134, 135, and 136). When a close command is issued with the tray chassis in an open state, the fourth motor (30) starts, and then the voltage applied to the motor is reduced by the ON signal from the fifth switch (135) SW5. to reduce the speed of tray chassis movement. Then, the fourth motor (30) is stopped by the ON signal from the sixth switch (136) SW6. Further, when an open command is issued when the tray chassis is closed, the fourth motor (30) is started, and then the voltage applied to the motor is reduced by the ON signal from the fourth switch (134) SW4, and the speed of tray chassis movement is increased. drop. Then, the fourth motor (30) is stopped by the ON signal from the sixth switch (136) SW6.

[0052] Therefore, the tray chassis (11) temporarily decelerates from high-speed movement and then stops, so that the shock at the time of stopping is alleviated.

FIG. 29 shows the third switch (133) SW3
The relationship between the on/off state of the fourth switch (134) SW4 and the position of the mechanism chassis (12) is shown. When the mechanism chassis (12) reaches the rising end, the third switch (133) is turned on and the mechanism is turned on. When the chassis (12) reaches the lower end, the fourth switch (134
) is turned on.

[0054] Rotating and stopping the disk table (2);
That is, in order to control starting and stopping of the third motor (70),
As shown in Figure 11, the outer peripheral wall (23) of the disk table (2)
, place the disc rest part (2) on the disc table (2).
1), detected parts for disc table rotation and stop control, each consisting of a disc identification slit (24) and a table stop slit (25) as a set, are formed at four locations at angular intervals of 90 degrees. . On the other hand, tray chassis (11)
The optical sensor (13
0) is arranged, and the outer circumferential wall (2) of the disk table (2) is
3) is sandwiched between them.

As shown in FIG. 16, the disk table (2
The disk identification slits (24) of ) are formed by providing notches as many as the disk numbers to be identified, and the table stop slits (25) are formed by providing each disk identification slit (24).
It is formed by providing one notch at a distance A from the center. Disc table of the disc to be played (2)
When the disc number representing the upper position is input from the operation panel, the optical sensor (130) rotates the disc table (2) until the disc identification slit (24) corresponding to the disc number is detected, and the disc identification slit (
24), the third motor (70) is decelerated. Thereafter, when the disc identification slit (24) is detected, the third motor (70) is stopped.

Therefore, the disk table (2) is as shown in FIG.
The turntable (120) and the pickup (111) are accurately stopped at the normal rotational angle posture in which the turntable (120) and the pickup (111) are exposed through the opening (22).

[Control device] Various operations of the disc player are controlled by a system controller (140) shown in FIG.
realized by The first to sixth switches (1
31) (132) (133) (134) (135) (1
36) and the optical sensor (130) are supplied to a system controller (140), which performs a preset procedure (FIG. 19).
26), the first motor to the fourth motor (1
21) A control signal for (113), (70), and (30) is created and output to each motor.

FIGS. 19 to 22 show the procedure when the skip button (not shown) on the operation panel is operated or the number of the disc to be played is input. Here, if the skip button is operated during signal playback (play mode), after stopping signal playback, the disk table will rotate until the next disk is set at the playback position, and the signal playback of that disk will start. will be started. Further, by inputting a disc number, the disc table is rotated to a position corresponding to the disc number, and the selected disc is played back. In these figures, CCW means counterclockwise rotation of the motor, CW (H) means clockwise rotation of the motor due to high voltage application, and CW (L):
This means clockwise rotation of the motor by applying low voltage. Furthermore, TOC means table information written on the disk.

FIGS. 23 to 26 show the procedure when the open/close button (not shown) on the operation panel is operated, thereby realizing the above-described opening and closing operations of the tray chassis.

The above description of the embodiments is for illustrating the present invention, and should not be construed to limit or reduce the scope of the invention described in the claims. Further, it goes without saying that the configuration of each part of the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the technical scope of the claims.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the appearance of a disc player according to the present invention.

FIG. 2 is an exploded perspective view of the disc player.

FIG. 3 is a longitudinal sectional view of the disc player.

FIG. 4 is a plan view showing the tray chassis in an open state.

FIG. 5 is a plan view showing the tray chassis in a closed state.

FIG. 6 is a sectional view of a tray chassis reciprocating mechanism and a tray chassis locking mechanism.

FIG. 7 is a plan view showing the tray chassis in a locked state in an open position.

FIG. 8 is a plan view showing the tray chassis in a locked state at a closed position.

FIG. 9 is an exploded perspective view showing the configuration of a mechanism chassis elevating mechanism and a driving mechanism.

FIG. 10 is an exploded perspective view showing a mechanism chassis elevation regulating mechanism, a disk table rotation regulating mechanism, and a mechanism chassis receiving mechanism.

FIG. 11 is a perspective view showing the back side of the disc table.

FIG. 12 is a plan view showing a state in which the disk table is in an incorrect rotation angle posture.

FIG. 13 is a plan view showing a disc clamp released state.

FIG. 14 is a plan view showing a state in which the mechanism chassis is being raised and lowered.

FIG. 15 is a plan view showing a state in which disk clamping is completed.

FIG. 16 is a developed view showing the positional relationship between a disc identification slit and a table stop slit formed in the disc table.

FIG. 17 is an explanatory diagram of a disk exchange operation.

FIG. 18 is a block diagram of a control device.

FIG. 19 is a flowchart showing a first part of the system controller's disk selection operation.

FIG. 20 is a flowchart showing a second portion of the system controller's disk selection operation.

FIG. 21 is a flowchart showing a third part of the disk selection operation of the system controller.

FIG. 22 is a flowchart showing a fourth part of the disk selection control operation of the system controller.

FIG. 23 is a flowchart showing a first part of the tray chassis open/close control operation of the system controller.

FIG. 24 is a flowchart showing a second part of the tray chassis open/close control operation of the system controller.

FIG. 25 is a flowchart showing a third part of the tray chassis open/close control operation of the system controller.

FIG. 26 is a flowchart showing a fourth part of the tray chassis open/close control operation of the system controller.

FIG. 27 is a time chart showing changes in the voltage applied to the fourth motor.

FIG. 28 is a diagram illustrating changes in the rotational speed of the fourth motor.

FIG. 29 is a time chart illustrating the lifting and lowering operation of the mechanism chassis and its detection operation.

[Explanation of sign]

(1) Base chassis (2) Disk table (3) Tray chassis reciprocating mechanism (4) Tray chassis locking mechanism (5) Mechanism chassis lifting mechanism (6) Disc table rotation mechanism (7) Drive mechanism (8) Oscillating gear mechanism (110) Pick-up device (120) Turntable

Claims (1)

[Claims] 1. A disk-shaped disk table (2) with a plurality of disk mounting sections (21) arranged in a circle is rotatably supported on a tray chassis (11), and a pickup device (110) is supported on the tray chassis (11). The equipped mechanism chassis (12) is supported so that it can be raised and lowered, and the disc table (
2) is driven by a rotating mechanism (6) to move an arbitrary disk mounting section (21) to a predetermined position for signal reproduction, and the mechanism chassis (12) has an elevating mechanism (5).
In the disc player, the mechanism chassis lifting mechanism (5) and the disc table rotation mechanism (6) are connected to each other to clamp and release the disc on the disc mounting section (21) by raising and lowering the mechanism chassis (12). a motor (70) serving as a common power source for the
It is driven by the motor (70), swings by switching the motor rotation direction, and selectively engages either the mechanism chassis lifting mechanism (5) or the disk table rotation mechanism (6). An oscillating gear mechanism (8) to transmit power to a partner mechanism, a cam follower (88) at one end, and a mechanism for lifting and lowering the mechanism chassis of the oscillating gear mechanism (8) at the other end. A lever mechanism having a protruding rocking restriction part (87) extending toward the rocking area on the mechanism side and a cam follower (88) of the lever mechanism formed on the back surface of the disc table (2) should be engaged. a cam portion (27), the cam portion (27) is configured to rotate the lever mechanism when the disc table (2) is in a normal rotation angle posture with the disc mounting portion (21) set at the predetermined position. The swing regulating part (87) is moved out of the swing area, and when the disc table (2) is not in the normal rotational angle posture, the swing regulating part (87) of the lever mechanism is removed.
7) A drive mechanism for a disc player, characterized in that the drive mechanism is formed in a cam curve that causes the cam to enter the swinging region.