JP2620658B2 - Drive mechanism of disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive mechanism for a multi-disc player capable of accommodating a plurality of discs and selectively or continuously reproducing these discs.

[0002]

2. Description of the Related Art In such a multi-disc player, a tray chassis is disposed in a cabinet so as to be reciprocally movable in a horizontal direction. On the tray chassis, a plurality of disc mounting portions are arranged in a circle to form a disk. Is rotatably supported, and the disk table is driven by a rotating mechanism to move an arbitrary disk mounting portion to a predetermined position for signal reproduction by rotation of the disk table. Also, on the tray chassis, a mechanism chassis equipped with a pickup device is supported so as to be able to move up and down,
An elevating mechanism is linked to the mechanism chassis to clamp and release the disk on the disk mounting part by elevating the mechanism chassis (Japanese Patent Laid-Open No. Sho 62-19).
2062).

[0003]

When a disk on a disk table is clamped, the disk table is rotated to a regular angular position for signal reproduction, and a pickup on a mechanism chassis is taken out of a window provided in the disk table. And the mechanism chassis is raised from the lower end in this state. As a result, the pickup projects upward from the window of the disk table and rises to a position where the disk signal surface is focused. However, in the above-mentioned disc player, the rotating mechanism of the disc table and the elevating mechanism of the mechanism chassis are configured separately and can be operated independently, and both mechanisms are controlled by an electric circuit. The mechanical chassis elevating mechanism may operate in a state where the disk table is not in the normal rotation angle posture due to occurrence of a mechanical trouble. In this state, when the mechanism chassis rises from the lower end, the pickup on the mechanism chassis collides with the back surface of the disk table.

[0004] It is an object of the present invention to provide a disk player capable of reliably preventing the malfunction by providing a safety mechanism that allows the operation of the mechanism chassis elevating mechanism only when the disk table is in a normal rotation angle posture. Is to provide a driving mechanism of

[0005] The drive mechanism of the disk player of the present invention comprises:
On the tray chassis (11), a disk-shaped disk table (2) having a plurality of disk mounting portions (21) arranged in a circle is rotatably supported, and a mechanism chassis (10) equipped with a pickup device (110) is provided. 12) is supported so as to be able to move up and down, and the disk table (2) is driven by a rotating mechanism (6),
Move any disc mounting part (21) to a predetermined position for signal reproduction, and lift mechanism on mechanism chassis (12).
(5), a disk player for clamping and releasing the disk on the disk mounting portion (21) by lifting and lowering the mechanism chassis (12), wherein the mechanism chassis lifting mechanism (5) and the disk table rotating mechanism
(6) a motor (70) serving as a common power source;
, And swings by switching the rotation direction of the motor, selectively engages with one of the mechanism chassis elevating mechanism (5) and the disc table rotating mechanism (6), and supplies power to the engagement partner mechanism. Gear mechanism that should transmit
(8) and a cam follower (88) formed at one end, and swinging in the direction in which the swinging gear mechanism (8) engages with the mechanism chassis elevating mechanism (5) at the other end. And a cam mechanism formed on the back surface of the disc table (2) and engaging with a cam follower (88) of the lever mechanism.
(27), wherein the cam portion (27) is a disc table.
When (2) has the normal rotation angle posture in which the disc mounting portion (21) is set at the predetermined position, the swing restricting portion (87) of the lever mechanism is moved to the swinging motion of the swinging gear mechanism (8). After moving out of the moving area, the swinging gear mechanism (8) and the mechanism chassis elevating mechanism (5) can be engaged.
When (2) is not in the normal rotation angle position, the swing restricting portion (87) of the lever mechanism is swung in the direction of engagement of the swinging gear mechanism (8) with the mechanism chassis elevating mechanism (5). The cam curve is formed so as to enter the movement area and prevent the engagement between the swinging gear mechanism (8) and the mechanism chassis elevating mechanism (5).

[0006]

When the motor (70) rotates in one direction, the swinging gear mechanism (8) swings toward the disk table rotating mechanism (6) and engages with the mechanism (6). The information is transmitted to the disk table (2). This allows the disk table
(2) rotates and periodically passes through the normal rotation angle posture and the incorrect rotation angle posture for each of the plurality of disk mounting portions (21), and finally, in the normal operation, the normal rotation angle posture is obtained. Stop in posture. With the rotation of the disc table (2) and thus the movement of the cam (27), the cam follower of the lever mechanism
(88) is driven, and when the disk table (2) takes the normal rotation angle posture, the swing restricting portion (87) of the lever mechanism retreats from the swing area of the swinging gear mechanism (8), The swinging gear mechanism (8) is allowed to swing toward the mechanism chassis lifting mechanism (5). When the disc table (2) takes an incorrect rotation angle posture, the swing restricting portion (87) of the lever mechanism enters the swing area of the swing gear mechanism (8), and the swing gear mechanism (8) moves. The swing of the mechanism (8) toward the mechanism chassis elevating mechanism (5) is prevented. Therefore, when the motor (70) rotates in the reverse direction while the disk table (2) is in the normal rotation angle posture, the swinging gear mechanism (8) moves the mechanism chassis elevating mechanism.
It swings to the (5) side to engage with the mechanism (5), and 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 the disk clamp is performed. On the other hand, when the disk table (2) is in an incorrect rotation angle posture,
Even if the motor (70) rotates in the reverse direction, the swinging gear mechanism (8) hits the swing restricting portion (87) of the lever mechanism and is prevented from engaging with the mechanism chassis elevating mechanism (5). Therefore, in this state, the mechanism chassis (12) is not driven up and down.

[0007]

According to the drive mechanism of the disk player according to the present invention, the cam portion (27) on the back surface of the disk table (2).
Since the operation of the swing gear mechanism is mechanically controlled by the lever mechanism, malfunction of the mechanism chassis elevating mechanism due to, for example, an electrical trouble can be reliably prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a compact disk 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 the scope thereof.

[Overall Configuration] As shown in FIG. 1, a tray chassis (11) is provided on a base chassis (1) fixed in a flat cabinet (150) so as to be able to reciprocate in a horizontal direction. ) On the top, there are four disc mounting parts (21)
Are arranged in a circle, and a disk-shaped disk table (2) is rotatably supported.

The tray chassis (11) is driven by a tray chassis reciprocating mechanism interposed between the tray chassis (11) and the base chassis (1) as described later, and as shown in FIG.
Open position exposing the cabinet from the (150),
All the disk mounting portions (21) are reciprocated in the horizontal direction between a closed position where the disk mounting portions (21) are accommodated in the cabinet (150).

As shown in FIG. 2, a mechanism chassis (12) is provided on the tray chassis (11) so as to be movable up and down, and a turntable rotatably driven by a first motor (121) is mounted on the mechanism chassis (12). (120) is deployed,
Optical pickup (111) for signal reproduction, and second
A pickup device (110) including a pickup transfer mechanism (112) for moving the pickup (111) in the radial direction of the disk by driving the motor (113) is provided. The mechanism chassis (12) is driven up and down by a mechanism chassis lifting mechanism described below. Also, on the tray chassis (11), a magnetic disc clamp having a clamper (101) for clamping the disc on the disc mounting portion (21) of the disc table (2) to the turntable (120) is provided. A mechanism (100) is provided.

The disk table (2) is provided with four openings (22) for the turntable (120) and the pickup (111) to correspond to the four disk mounting portions (21). ing. Further, as shown in FIG. 3, between the tray chassis (11) and the disc table (2),
A disk table rotating mechanism (6) for rotating and driving (2) is interposed. The mechanism chassis elevating mechanism and the disc table rotating mechanism are switched and driven using a third motor (70) shown in FIG. 4 as a common power source, as described later.

As described above, the tray chassis (11) is equipped with all the mechanisms for signal reproduction. Therefore, not only the tray chassis (11) is installed in the closed position as shown in FIG. The signal can be reproduced even when the tray chassis (11) is installed at the open position as shown in FIG.
Further, by moving the tray chassis (11) from the closed position to the open position, the two disk mounting portions are moved.
Since (21) is exposed from the cabinet (150), FIG.
By repeating the disk exchange operation shown in (a), (b) and (c) twice, all disks on the disk table (2) can be exchanged.

[Tray Chassis Reciprocating Mechanism (3)] On the base chassis (1), as shown in FIG. 2, a connecting shaft (33) extending at right angles to the tray chassis moving direction is provided at an end on the tray chassis discharge side. The connecting shaft is rotatably mounted
A gear (34) and a roller (35) are fixed to both ends of (33), respectively. On the other hand, as shown in FIG. 3, a pair of left and right wheels (3
6) (36) protrudes downward and rides on the upper surface of the base chassis (1). Also, on both sides of the tray chassis (11), a rack (14) meshing with the gear (34) and the roller (14), respectively.
A groove (15) engaging with (35) is formed in the tray chassis moving direction. Thus, the tray chassis (11) is guided and supported on the base chassis (1) so as to be able to reciprocate.

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

On the other hand, a drive pinion (31) to be meshed with the rack (42) of the rack plate (41) is provided on the tray chassis (11).
A fourth motor (30) for driving the drive pinion (31) and a speed reduction mechanism (37) are provided. A roller (32) that fits into the groove (43) of the rack plate (41) is attached to the lower end of the pivot of the drive pinion (31).

Therefore, when the drive pinion (31) rotates in the forward and reverse directions by the drive of the fourth motor (30), the drive pinion (31)
The tray chassis (11) reciprocates between the closed position and the open position due to the engagement between the tray chassis (11) and the rack (42). still,
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 drive pinion (31) and the rack (42).
Will be disengaged.

[Tray Chassis Lock Mechanism (4) (40)] In order to lock the tray chassis (11) at the closed position and the open position, respectively, FIG.
As shown in FIG. 8, the tray chassis lock mechanism (4) (4)
0) is provided. Each tray chassis lock mechanism (4) (40)
Is the sector gear (44) (45) mounted on the rack plate (41)
And springs (38) and (39) for rotationally biasing these sector gears, and the tooth surfaces of the sector gears (44) and (45) are formed so as to be continuous with the rack tooth surface of the rack plate (41). Have been.

When the tray chassis (11) reaches the open position as shown in FIG. 4, the drive pinion (31) is moved to the rack (42).
After being disengaged, the fourth motor (30) further rotates by a fixed angle by driving the same, and meshes with the sector gear (45) as shown in FIG. Rotate. As a result, the end of the sector gear (45) projects toward the groove (43), restricting the movement of the drive pinion (31), and
(11) is locked in the open position. FIG.
Similarly, when the tray chassis (11) reaches the closed position, the drive pinion (31) starts engaging with the sector gear (44) immediately after disengagement from the rack (42), as shown in FIG. As shown at 8, the sector gear (44) is rotated counterclockwise. As a result, the end of the sector gear (44) projects toward the groove (43), restricts the movement of the drive pinion (31), and the tray chassis (11) is locked at the closed position.

The unlocking of the tray chassis (11) is performed by clockwise rotation of the drive pinion (31) in the open position and by counterclockwise rotation of the drive pinion (31) in the closed position.

[Mechanism Chassis Lifting Mechanism (5)] FIG.
Like the mechanism chassis (12), the tray chassis (11)
A pair of shafts (51) and (51) are provided at the base end of the mechanism chassis and project in opposite directions to each other.These shafts are pivotally supported by the tray chassis (11). ,
The mechanism chassis (12) is supported so that it can move up and down.
The mechanism chassis (12) is urged in the ascending direction by a spring (53) stretched between the mechanism chassis (12) and the tray chassis (11). Further, the shaft (5) is attached to the mechanism chassis (12).
A driven pin (52) protrudes at a position closer to the free end than in (1).

A sub-chassis (10) is arranged at a distance from the rear surface of the tray chassis (11) downward and is fixed to the tray chassis (11). On the sub-chassis (10), a driving rotator that is rotationally driven by power from a third motor (70)
The mechanism chassis (1) is attached to a first cam portion (76) formed downward on the driving rotor (74).
The driven pin (52) of 2) is brought into sliding contact, and the mechanism chassis (12) is driven up and down by rotation of the first cam portion (76) in the counterclockwise direction.

At the lower end of the mechanism chassis (12), the turntable (120) and the pickup (111) retreat downward from the rotation area of the disk table (2) to allow the rotation of the disk table (2). Mechanism chassis (1
With the rise of 2), the turntable (120) lifts the disc on the disc table (2) and presses the disc against the disc clamping mechanism (100), and the tray chassis (11) reaches the rising end. In the state, the disk clamping by the predetermined clamping force is completed.

[Disk Table Rotating Mechanism (6)] The disk table (2) has a boss (2) formed at the center as shown in FIG.
The support shaft (64) on the tray chassis (11) penetrates through (00) and is rotatably supported. On the back surface of the disk table (2), a rack (26) extending circumferentially along the outer peripheral wall (23) protrudes inside the outer peripheral wall (23) as shown in FIG.
The rack 26 is accommodated in an annular recess 13 formed in the tray chassis 11 as shown in FIG.

The tray chassis (11) is provided with a drive pinion (61) having a tooth surface protruding into the annular recess (13), and the drive pinion (61) is mounted on the rack (26) of the disk table (2). Always meshed. Therefore, the disk table (2) is rotationally driven by the rotation of the drive pinion (61). The drive pinion (61) is formed integrally with a driven gear (62) disposed on the sub-chassis (10) as shown in FIG.
By transmitting the rotation of the third motor (70) to the driven gear (62), the disk table (2) is driven.

[Driving Mechanism (7)] In order to switch and transmit the rotation of the third motor (70) to the driving rotator (74) and the driven gear (62), a third motor is mounted on the sub-chassis (10). A swing gear mechanism (8) operated by a motor (70) is provided. The swinging gear mechanism (8) includes a driving gear (81), a rocking plate (84) that can rock around a spindle of the driving gear (81), and a rocking plate (8).
4) A large swing gear (82) attached to the free end, and a small swing gear formed integrally with the large swing gear (82).
(83) and a well-known friction mechanism (not shown) for imparting resistance to the rotation of the large swing gear (82) and the small swing gear (83). It always meshes with the large diameter gear (82). The large-diameter gear (82) is a driven gear (62).
The swing small-diameter gear (83) is provided at a position where it can mesh with the 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, when the third motor (70) rotates clockwise, the swinging gear mechanism (8) swings clockwise, and the large swinging gear (82) shifts the driven gear (62). As a result, the drive pinion (61) rotates clockwise. As a result, the disk table (2) is rotated clockwise. When the third motor (70) rotates in the counterclockwise direction, the swinging gear mechanism (8) swings in the counterclockwise direction, and the small swinging gear (83) is driven by the driven gear (74). (7
5), whereby the first cam portion (76) rotates counterclockwise, and the mechanism chassis (12) is driven up and down.

[Mechanism Chassis Elevation Control Mechanism] In a normal operation, the rotation of the disk table (2) is performed by opening the mechanism chassis (1) from the opening (22) of the disk table (2).
2) The turntable (120) and the pickup (111) are stopped at a regular rotation angle posture exposing the same, and the mechanism chassis (12) is moved up and down in this state. However, if the mechanism chassis (12) is driven up and down while the disc table (2) is set to an incorrect rotation angle posture other than the normal rotation angle posture for some reason, the turntable (120) or the pickup (111) will collide with the disk table (2). Therefore, in a state where the disk table (2) is in an incorrect rotation angle posture, in order to mechanically prevent the swinging gear mechanism (8) from approaching the driving rotating body (74), the mechanism chassis lifting / lowering mechanism is provided. Be equipped.

As shown in FIG. 9, a first lever (86) is rotatably supported on the sub-chassis (10), and one free end of the first lever (86) has a swing gear mechanism (8). ), A swing restricting portion (87) that can contact the swing plate (84) is formed, and a cam follower (88) protrudes upward from the other free end. The cam follower (88) is provided in the opening of the tray chassis (11) as shown in FIG.
(19), 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 disk table (2), as shown in FIG. 11, V-shaped positive cams (27) are protruded at four positions with an angular interval of 45 degrees.

In a state where the disk table (2) is in an incorrect rotation angle posture as shown in FIG.
Is separated from the cam follower (88) of the first lever (86). In this state, the first lever (86) is
When the cam follower (8
8) contacts the edge of the opening (19) of the tray chassis (11). As a result, the swing regulating portion (87) of the first lever (86) advances to the swing area of the swing plate (84) of the swinging gear mechanism (8), and the swing plate (8
4) swinging toward the driving rotating body (74), that is, a swing gear mechanism
(8) Swing small diameter gear (83) and driven gear of prime mover (74)
Engagement with (75) is prevented.

As shown in FIG. 13, when the disk table (2) is rotated to a normal rotation angle posture, the disk table (2) is rotated.
Drives the cam follower (88) of the first lever (86) to rotate the first lever (86) clockwise against the spring (89). As a result, the swing restricting portion (87) of the first lever (86) retreats from the swing region of the swing plate (84) of the swing gear mechanism (8), and the prime mover of the swing gear mechanism (8) moves. The approach to the rotating body (74) is allowed.

[Disc table rotation restricting mechanism] When the swinging gear mechanism (8) swings counterclockwise as described above, the meshing between the large swing gear (82) and the driven gear (62) is released, and the disc is rotated. The rotation of the table (2) is free. For example, if the disk table (2) rotates in the play mode, the signal reproducing operation is hindered. So, the mechanism chassis (12)
The disc table (2) is used while the
In order to mechanically prevent the rotation of the disk table, a disk table rotation restricting mechanism is provided.

As shown in FIG. 10, the second lever (9) and the third lever (95) are pivotally supported on bosses (163) and (164) projecting from the back surface of the tray chassis (11), respectively. A slide plate (50) is attached to guide pins (161) and (162) projecting from the back surface of the tray chassis (11) so as to be reciprocally movable. Further, a second cam portion (77) is formed integrally with the driving rotator (74) below the driven gear (75), and the second cam portion (77) has 180 An annular cam groove (78) having a small-diameter cam groove (79) and a large-diameter cam groove (80) is recessed at a phase difference of degrees.
The small-diameter cam groove (79) and the large-diameter cam groove (80) are connected by a circumferential cam groove having an intermediate radius between the two cam grooves.

As shown in FIG. 10, a cam follower (91) protrudes from one free end of the second lever (9).
1) penetrates the notch (16) provided in the sub-chassis (10) to engage with the cam groove of the second cam portion (77) of the driving rotating body (74). A pin (92) protrudes from the other free end of the second lever (9), and the pin (92) is connected to a window formed in the slide plate (50).
(55). Second lever (9) and slide plate (50)
A spring (93) is stretched between them, and the slide plate (50) is
Energize in the direction away from (95).

A pin (9) is attached to one free end of the third lever (95).
6) is projected downward, and the pin (96) is brought into sliding contact with the end face of a triangular cam piece (59) projecting from the end of the slide plate (50) in the sliding direction. An arc-shaped rotation restricting piece (97) projects upward from the other free end of the third lever (95). The rotation restricting piece (97) is attached to the opening (19) of the tray chassis (11). ) And make it face the back of the disk 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 of the disk table (2),
As shown in FIG. 11, an inner peripheral wall (28) is protruded inside the four openings (22), and the inner peripheral wall (28) is provided at an angular interval of 90 degrees.
Two notches (29) have been opened.

FIG. 13 shows a state in which the mechanism chassis (12) is held at the lower end by the operation of the mechanism chassis lifting mechanism (5). In this state, the cam of the second lever (9) is moved. The follower (91) engages with the small-diameter cam groove (79) of the second cam portion (77) of the driving rotating body (74), and the second lever (9) is held at the counterclockwise rotating end. I have. The slide plate (50) is moved by the pin (92) of the second lever (9).
Moves toward the third lever (95) side against the spring (93).

By the cam piece (59) of the slide plate (50),
The pin (96) of the third lever (95) is pressed, and the third lever (95)
Is held at a counterclockwise rotating end against the spring (98). Thereby, the rotation restricting piece (97) of the third lever (95)
Moves inside the inner peripheral wall (28) of the disk table (2) and is separated from the notch (29).

When the driving mechanism 74 rotates counterclockwise from the state shown in FIG. 13 and the mechanism chassis 12 is driven upward, as shown in FIG.
The second lever (9) is rotated slightly clockwise by the drive of (7). Accordingly, the slide plate (50) is moved to the third lever (9
5), and the third lever (95) is released from the spring (9).
It rotates clockwise by the bias of 8). As a result, the third
The rotation restricting piece (97) of the lever (95) enters the notch (29) of the inner peripheral wall (28) of the disc table (2),
The rotation of (2) is prevented.

FIG. 15 shows a state in which the mechanism chassis (12) is installed at the rising end and the disk clamp is completed. In this state, the rotation of the driving rotating body (74) causes the second lever (9) to rotate. Cam follower (91) is the second cam part
(77) engages with the large-diameter cam groove (80), whereby the second lever (9) is held at the clockwise turning end. The slide plate (50) further separates from the third lever (95), whereby the third lever (95) rotates to the clockwise rotation end, and the rotation restricting piece (97) moves the disc table (2). ) Into the notch (29) of the inner peripheral wall (28). Therefore, the rotation of the disk table (2) is reliably prevented while the mechanism chassis (12) is moving up and down and in the play mode.

After playing the disk, the disk table (2)
When replacing the disk by rotating the
The driving rotator (74) is further rotated counterclockwise by the driving of (0). As a result, the second lever (9) rotates counterclockwise, the slide plate (50) moves to the third lever (95) side, and the third lever (95) moves the cam piece of the slide plate (50). When the mechanism chassis (12) reaches the lower end by being driven counterclockwise by being driven by (59), the rotation restricting piece (97) of the third lever (95) as shown in FIG. Is separated from the notch (29) of the inner peripheral wall (28) of the disk table (2), and the disk table (2) is allowed to rotate.

[Mechanism Chassis Receiving Mechanism] When all the discs on the disc table (2) are taken out and the disc player is carried, the mechanism chassis (12) is raised by the driving rotator (74) shown in FIG. Installed in At this time, the mechanism chassis (12) is urged upward by a spring (53) shown in FIG.
(52) is held at the rising end by the urging force of the spring (53) in a state of sliding contact with the first cam portion (76) of the driving rotating body (74). In this state, the driven pin of the mechanism chassis (12)
(52) is the driven gear (75) of the driving rotating body (74) and the first cam portion (7
It can be moved up and down within the margin of 6).

Therefore, for example, when the device is accidentally dropped during carrying, a large impact force acts on the mechanism chassis (12), and the mechanism chassis (12) drops rapidly in the movable range, and reaches the lower end. There is a possibility that the pickup device may be damaged when colliding. Therefore, in the state shown in FIG. 15, a mechanism chassis receiving mechanism is provided to reliably receive the mechanism chassis (12) at the position of the rising end.

As shown in FIG. 10, first and second projecting pieces (17) and (18) are formed on the free end side of the mechanism chassis (12). On the other hand, the slide plate (50) includes the first and second projections.
(17) According to (18), the first and second receiving pieces (56) and (57) are protruded.

In a state where the mechanism chassis (12) is installed at the lower end as shown in FIG. 13 and a state where the mechanism chassis (12) is moving up and down as shown in FIG. 14, the first and second mechanism chassis (12) are moved. The projecting pieces (17) and (18) and the first and second receiving pieces (56) and (57) of the slide plate (50) are in a positional relationship such that they do not overlap with each other, and the mechanism chassis (12) can be freely moved up and down. It is.

As shown in FIG. 15, the slide plate (50) moves in a direction away from the third lever (95), and the mechanism chassis is moved.
When (12) reaches the rising end, the ends of the first and second receiving pieces (56) and (57) of the slide plate (50) are respectively attached to the mechanism chassis.
It moves under the first and second projecting pieces (17) and (18) of (12) and moves to a position where the mechanism chassis (12) can be lowered. In this state, even if an impact force is applied to the mechanism chassis (12), the mechanism chassis (12) is surely secured by the first and second receiving pieces (56) and (57) of the slide plate (50). The damage to the pickup device (110) due to the impact is avoided.

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

As shown in FIG. 13, the tray chassis (11) includes a second switch (132) for detecting that the mechanism chassis (12) has reached the rising end, and a mechanism chassis (12). The third to detect the state of reaching the falling edge
A switch (133) is provided. In order to turn on and off these switches, a pressing piece (58) is protruded from the slide plate (50). Accordingly, the disk clamp completion state (FIG. 15) is detected by the ON signal from the second switch (132), and the disk clamp release state (FIG. 13) is detected by the ON signal from the third switch (133).

As shown in FIGS. 7 and 8, the tray chassis (11) has a fourth switch (134) for detecting a deceleration position when the tray chassis is open, and a deceleration position when the tray chassis is closed. 5th switch (13
5) and the sixth for detecting the tray chassis stop position
A switch (136) is arranged. To turn on and off the fourth switch (134) and the fifth switch (135), a pair of side plates (48) and (49) stand on a rack plate (41) on the base chassis (1) as shown in FIG. Is established. The sixth switch (136)
In order to turn on and off the fan gear (4) constituting the tray chassis lock mechanism (4) at the tray chassis closed position,
4) A first pin (46) is protruded above the tray chassis lock mechanism (40) at the tray chassis open position.
A second pin (47) is protrudingly provided on the sector gear (45) that constitutes (1).

When the tray chassis (11) is locked in the open position as shown in FIG. 7, the second pin (47) on the sector gear (45) is rotated by the clockwise rotation of the sector gear (45). 6. Turn on the switch (136). When the tray chassis (11) is locked in the closed position as shown in FIG.
By the counterclockwise rotation of 4), the first pin (46) on the sector gear (44) turns on the sixth switch (136).

FIGS. 27 and 28 show changes in the applied voltage of the fourth motor (30) based on the ON and OFF signals from the fourth to sixth switches (134), (135) and (136) and the motor rotation speed. When the close command is issued in the open state of the tray chassis, the fourth motor (30) is started, and thereafter, the fifth switch (135) is turned on from the SW5.
The signal lowers the voltage applied to the motor to slow down the movement of the tray chassis. Then, the sixth switch (136) S
The fourth motor (30) is stopped by the ON signal from W6. Further, when an open command is issued when the tray chassis is closed, the fourth motor (30) is started, and thereafter, the motor application voltage is reduced by an ON signal from the fourth switch (134) SW4, and the speed of the tray chassis movement is reduced. Drop. Then, O from the sixth switch (136) SW6
The fourth motor (30) is stopped by the N signal.

Accordingly, the tray chassis (11) once decelerates from high-speed movement and then stops, so that the impact at the time of stop is reduced.

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

To control the rotation and stop of the disk table (2), that is, the start and stop of the third motor (70), FIG.
On the outer peripheral wall (23) of the disk table (2), one set of a disk identification slit (24) and a table stop slit (25) is provided for each disk mounting portion (21) on the disk table (2). Detected portions for controlling the rotation and stop of the disk table are formed at four locations at 90 degree intervals. On the other hand, on the tray chassis (11), an optical sensor (130) composed of a transmission type photoelectric switch is arranged, and the optical sensor (130)
The outer peripheral wall (23) of the disk table (2) is sandwiched between the light projecting element and the light receiving element.

As shown in FIG. 16, the disk table (2)
The disk identification slits (24) are formed by providing notches of the number of disk numbers to be identified, and the table stop slits (25) are separated from each disk identification slit (24) by a fixed distance A.
It is formed with one notch apart. When the disc number indicating the position of the disc to be played on the disc table (2) is input from the operation panel, the optical sensor
(130) is the disc identification slit (2
Rotate the disk table (2) until 4) is detected,
After detecting the disc identification slit (24), the third motor (70)
Slow down. Thereafter, when the disc identification slit (24) is detected, the third motor (70) is stopped.

Therefore, the disk table (2) is accurately stopped at a normal rotation angle posture exposing the turntable (120) and the pickup (111) from the opening (22) as shown in FIG.

[Control Device] Various operations of the disc player are realized by a system controller (140) shown in FIG. The first to sixth switches (131) (13)
2) Signals from (133) (134) (135) (136) and the optical sensor (130) are supplied to a system controller (140), and the system controller (140) performs a predetermined procedure (FIG. 1).
9 to 26), the first to fourth motors (12
1) 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 reproduced is input. Here, if the skip button is operated during signal reproduction (play mode), after stopping the signal reproduction, the disk table rotates until the next disk is set to the reproduction position, and the signal reproduction of this disk is stopped. Be started. Further, by inputting the disk number, the disk table is rotated to a position corresponding to the disk number, and the selected disk is reproduced. In these figures, CCW means clockwise rotation of the motor, CW (H) means clockwise rotation of the motor by applying a high voltage, and CW (L) means rotation by a low voltage. Means clockwise rotation of the motor. Also, TOC
Means table information written on the disk.

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

The description of the above embodiments is for the purpose of illustrating the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

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 vertical sectional view of the disc player.

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

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

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

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

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

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

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

FIG. 11 is a perspective view showing the back surface of the disk table.

FIG. 12 is a plan view showing a state where 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 moved up and down.

FIG. 15 is a plan view showing a state where the disk clamp is completed.

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

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

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

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

FIG. 20 is a flowchart showing a second part of the disk selection operation of the system controller.

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 portion of a 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 illustrating a third part of the tray chassis open / close control operation of the system controller.

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

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

FIG. 28 is a diagram illustrating a change in rotation speed of a fourth motor.

FIG. 29 is a time chart for explaining a lifting operation and a detecting operation of the mechanism chassis.

[Description of sign]

 (1) Base chassis (2) Disk table (3) Tray chassis reciprocating mechanism (4) Tray chassis lock mechanism (5) Mechanism chassis elevating mechanism (6) Disk table rotating mechanism (7) Drive mechanism (8) Swing gear mechanism (110) Pickup device (120) Turntable

Claims (1)

(57) [Claims] 1. A disk-shaped disk table (2) having a plurality of disk mounting portions (21) arranged in a circle on a tray chassis (11) is rotatably supported, and a pickup device (110) is mounted on the disk table. The mounted mechanism chassis (12) is supported so as to be able to move up and down, and the disk table (2) is driven by the rotating mechanism (6) to move an arbitrary disk mounting portion (21) to a predetermined position for signal reproduction. Let the mechanism chassis (12)
Is connected to the lifting mechanism (5), and the mechanism chassis (12)
In the disk player which clamps and releases the disk on the disk mounting portion (21) by raising and lowering
A motor (70) serving as a common power source for the mechanism chassis elevating mechanism (5) and the disc table rotating mechanism (6); Mechanism chassis elevating mechanism
(5) and a swinging gear mechanism (8) for selectively engaging with one of the disk table rotating mechanism (6) and transmitting power to the engagement partner mechanism, and a cam follower on one end. (88), and a swing restricting portion extending at the other end in a direction for preventing the swinging gear mechanism (8) from swinging in a direction for engaging with the mechanism chassis elevating mechanism (5). (87), and a cam portion (27) formed on the back surface of the disc table (2) and engaged with a cam follower (88) of the lever mechanism. ), When the disc table (2) is in a normal rotation angle posture in which the disc mounting portion (21) is set at the predetermined position, the swing restricting portion (87) of the lever mechanism is moved to the swinging gear mechanism. Retreat from the swing area of (8), and engage the swinging gear mechanism (8) with the mechanism chassis elevating mechanism (5). When the disc table (2) is not in the normal rotation angle posture, the swing restricting portion (87) of the lever mechanism is connected to the mechanism chassis elevating mechanism (5) of the swinging gear mechanism (8). A disk having a cam curve which is inserted into the swinging area in the engagement direction to prevent engagement between the swing gear mechanism (8) and the mechanism chassis elevating mechanism (5). Player drive mechanism.