JP2685000B2 - 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 disc player for mounting a disc on which music or video is converted into a digital signal and recording the disc on a turntable and recording or reproducing information on the disc by a pickup.

[0002]

2. Description of the Related Art Conventionally, there has been a technique in which a laser disk having a diameter of 30 cm or a compact disk having a diameter of 12 cm is placed on a tray to be moved in and out of a turntable position, and information on the disk on the turntable is reproduced by a pickup. .

[0003]

In the prior art, the tilt of the pickup is controlled to correct the distortion deformation of the disc, but the tilt of the pickup is also controlled when the disc is stopped at the end of reproduction. Supported by the state,
If the pickup is stopped while it is located on the outer circumference of the disc where the amount of deformation increases, the pickup is supported with a large tilt, and when playing the next disc,
When the pickup moves to the inner circumference side of the disk, there are problems that the pickup is likely to come into contact with other parts and that the focus of the pickup is out of focus, resulting in erroneous detection.

[0004]

SUMMARY OF THE INVENTION However, according to the present invention, in a disc player in which a pickup is opposed to a disc on a turntable to reproduce information on the disc, tilt control movement of the pickup is interlocked with stop control of the disc. It is characterized in that a control circuit for moving the pickup to the inner peripheral side of the disk is provided while continuing the operation.

[0005]

[Operation] Therefore, since the pickup is moved to the inner peripheral side of the disc with a small amount of deformation and stopped in a state of being supported substantially horizontally, it is possible to eliminate the conventional problems and obtain a stable pickup operation. It is possible to easily improve the safety and the disc reproducing function as compared with the conventional one, while maintaining the manufacturing cost and the handling property.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a control circuit diagram of a main part, FIG. 2 is a plan view showing an outer appearance of a disc player, FIG. 3 is a plan view showing an internal structure,
Figure 4 is a side view of the same, FIG. 5 is a sectional view, causes fixed the main chassis (2) inside the box-shaped of the casing (1) is a disc player cabinet, as shown in FIG. 4, the main A motor mounting chassis (3) is arranged in the center of the chassis (2), and a turntable motor (5) is fixed to the lower surface side of the mounting chassis (3) via a motor holder (4), and the motor (5) is fixed. The output shaft (6) is projected to the upper surface side of the mounting chassis (3) and the turntable (7) is provided at the upper end.

Further, as shown in FIG. 3, a pedestal (9) for mounting the laser pickup (8) is provided on the pickup mounting chassis (11) via a columnar rail (10), and a fulcrum shaft () is attached to the chassis (11). 12) is provided, and the fulcrum shaft (12) is supported by the bearing (13) provided on the motor mounting chassis (3). Further, a tilt motor (14) for controlling the tilt of the pickup (8) and a screw shaft (17) connected to the motor (14) via a worm (15) and a worm wheel (16) are attached to a mounting frame ( 18) via the main chassis (2) via the nut body (19a) and the hinge arm (1).
The screw shaft (17) is connected to the rear end of the pickup mounting chassis (11) via a hinge mechanism (19) composed of 9b), and the fulcrum shaft (1) is controlled by the tilt motor (14).
The pickup mounting chassis (11) is swung up and down around 2) to control the tilt of the pickup (8) to correct the distortion of the disc.

Further, a pickup moving rack gear (20) is fixedly mounted on the pedestal (9), and a pickup motor (2) is attached to the pickup mounting chassis (11).
1) is attached, the rack gear (20) and the motor (21) are connected via a drive gear (22), and the pickup (8) is reciprocated along the rail (10) by forward / reverse control of the motor (21). It is configured to slide.

[0009] In addition, as shown in FIG. 2, the diameter is 30cm in Les
Disk placed on surface for placing a chromatography The disk (23) (24)
A disk mounting surface (26) on which a small-diameter laser disk (25) having a diameter of 20 cm is mounted, and a disk mounting surface (2) on which a compact disk (27) having a diameter of 12 cm is mounted.
And (8) and the tray (2
9) and the guide pin (30) as shown in FIG.
The left and right slide plates (32a) and (32b) are slidably supported in the main chassis (2) through the guide groove (31), and the guide arm (33) and the guide roller (34) shown in FIG. Is engaged with the guide grooves (29a) (29b) of the tray (29) shown in FIG. 5 to slidably support the tray (29) above the slide plates (32a) (32b).

A chuck plate mounting chassis (35) is suspended on the upper surface side of the main chassis (2), and a chuck plate (37) is mounted on the lower surface side of the central portion of the mounting chassis (35) via a holder (36). Fit and support, and dispose a chuck plate (37) substantially directly above the turntable (7),
When the motor mounting chassis (3) is lifted, the upper surface of the turntable (7) is pressed against the chuck plate (37) and each disc (23) (2) mounted on the tray (29).
5) (27) is fixedly supported on the turntable (7).

Further, a loading motor (38) for loading and unloading the tray (29) is fixed to the lower surface of the main chassis (2), and the guide arm (33) and the guide roller (34), the slide plate (32a) ( The tray (2) which is supported by the guide bodies (39) (39) formed in 32b).
9) is configured to slide in and out by the forward and reverse rotations of the motor (38), and the turntable (7) is moved up and down to chuck the disks (23) (25) (27). There is.

Further, as shown in FIG. 3, the main chassis (2)
The swing arm (41) is pivotally supported on the upper surface via a support shaft (40), and pins (4) are attached to both ends of the arm (41).
2) Left and right slide plates (32a) (32) via (42)
b) is connected, and the pickup mounting chassis (11) is mounted so as to be able to move up and down with the hinge mechanism (19) as a fulcrum, and is interlocked with the rise of the turntable (7) on which the disks (23) (25) (27) are placed. The pickup mounting chassis (11) is raised to move the pickup (8) to the set position.

Further, as shown in FIG. 1, the pickup (8), the stop switch (43) for stopping the reproducing operation of the discs (23), (25) and (27), and the pickup on the axis of the turntable (7). A limit switch (44) for detecting the closest position of (8) is input-connected to a disk control circuit (45) formed by a microcomputer, and a turntable motor (5),
Tilt motor (14) and pickup motor (21)
Output connection to the disk control circuit (45),
A pickup (8) is made to face the lower surface of a disk (23) (25) (27) which is supported and rotated on a turntable (7) from the lower side, and is picked up in a radiation direction centered on an axis of the turntable (7). (8) is slid back and forth to reproduce the information on the disks (23), (25) and (27), and the stop switch (43) is operated to operate the disk (2).
3) When the rotation of (25) and (27) is stopped and taken out,
The pickup (8) is moved to the discs (23) (25) while the tilt control operation of the pickup (8) is continued in conjunction with the stop control of the discs (23) (25) (27).
It is constructed so as to be moved to the inner peripheral side of (27) and positioned.

This embodiment is constructed as described above, and is shown in FIG.
When the tray (29) is pulled out as shown in
3) Any one of (25) and (27) is placed on the tray (29), the loading motor (38) is operated to allow the tray (29) to enter, and when the entrance of the tray (29) is completed, a slide is performed. Sliding the plates (32a) (32b) to raise the motor mounting chassis (3),
The turntable (7) is lifted, and the discs (23), (25) and (27) on the upper surface of the tray (29) are held by the turntable (7) and the chuck plate (37). 23) (25) (2
The pickup (8) is slid while rotating (7) to read and reproduce information on the disks (23), (25) and (27).

Further, the disks (23) (25) (27)
6 and 7, when the stop switch (43) is turned on, the turntable motor (5) is turned off, the tilt motor (14) is turned on, and the pickup (8) is turned on. The tilt operation for controlling the tilt is started, and the pickup motor (21) is turned on to move the pickup (8) to the discs (23) (2).
5) The tilt motor (1) is moved to the innermost position of (27) and when the limit switch (44) is turned on.
4) and the pickup motor (21) are stopped. When the turntable motor (5) is turned off and the disks (23), (25) and (27) are rotating in an elliptical manner,
Tilt motor (14) and pickup motor (21)
Is operated, and the tilt control operation of the pickup for correcting the distortion deformation of the disks (23) (25) (27) is continued, the disks (23) (25) (2) with less distortion deformation are
The pickup (8) is moved to the innermost position of (7), and the pickup (8) is supported at a substantially horizontal position.

As described above, the disk control circuit (45)
By forming the software of FIG. 7 as shown in the flowchart of FIG. 7, the disks (23), (25) and (27) are stopped while the pickup (8) is always supported substantially horizontally, so that the manufacturing cost can be increased. At the same time, since the pickup (8) is moved to the inner peripheral side and horizontally supported during elliptic rotation of the disks (23), (25) and (27),
The horizontal control of the pickup (8) can be performed without extending the time (ejection time) required from the stop operation of the discs (23) (25) (27) to the removal.

[0017]

As is apparent from the above-described embodiments, the present invention provides the disks (23) (2) on the turntable (7).
5) In the disc player for reproducing the information of the discs (23), (25) and (27) with the pickup (8) facing the (27), the discs (23) (25) (27)
Control times for moving the pickup (8) on the inner peripheral side of the disk (23) (25) (27) in a state of being continued inclination control movement <br/> operation of the pickup in conjunction with stop control (8)
A disc (23) with a passage and a small amount of deformation
(25) Since the pickup (8) is moved to the inner peripheral side of (27) and stopped in a state of being supported substantially horizontally, it is possible to eliminate the conventional problems and obtain a stable pickup (8) operation. While maintaining the same manufacturing cost and handleability as before, safety and disk (2
3) (25) (27) It is possible to easily improve the reproducing function and the like.

[Brief description of the drawings]

FIG. 1 is a control circuit diagram of a main part showing an embodiment of the present invention.

FIG. 2 is a plan view showing the appearance of a disc player.

FIG. 3 is a plan view showing an internal structure.

FIG. 4 is a side view of the same.

FIG. 5 is a sectional explanatory view.

FIG. 6 is an output diagram.

FIG. 7 is a flowchart.

[Explanation of symbols]

(7) Turntable (8) Pickup (23) (25) (27) Disc (45) Control circuit

Claims (1)

(57) [Claims] 1. In a disc player for reproducing information of a disc by making the pickup face a disc on a turntable, the pickup is placed inside the disc while the tilt control operation of the pickup is continued in association with the stop control of the disc. A disc player provided with a control circuit for moving to the circumferential side.