JPH09115254A - Pickup inversion device for disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a base plate equipped with a pickup a self-traveling system mounting a driving mechanism for the base plate and to stabilize the base plate in its traveling in a linear part and a curved part on both sides of a guide rail respectively. SOLUTION: In the state of the pickup 4 facing one surface side of a recorded disk 2, when reproduction is operated on the other surface side of the recorded disk, a motor 10 is driven to rotate, and this rotation is reduced in speed by a worm 11 and a worm wheel 12a, so that a gear 14 is rotated integrally with the worm wheel 12a by a rotary axis 15 of the worm wheel 12a. Since the gear 14 is meshed with a rack part 13a of the guide rail 13, the base plate 5 is moved in the direction of the arrow, and is positioned on the other surface side of the recorded disk 2 in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup for a disc player in which both sides of the disc can be automatically reproduced by moving the pickup to the other side of the disc without the operation of turning over the disc. Reversing device

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, a conventional pickup reversing device for a disc player of this type has a central portion U which is located parallel to both sides of a disc 2 mounted on a center spindle 1. A base plate 5 having a pickup 4 is slidably attached to a guide rail 3 curved in a letter shape, and a wire 9 wound around a reversing drum 6 and a drive drum 7 located in a curved portion of the guide rail 3. Both ends of the base plate 5 are suspended from the base plate 5, and the base plate 5 is moved along the guide rails 3 by feeding the wire 9 by the rotation of the drive drum 7. A worm 11 is fixed to a motor shaft 10a of a motor 10 as a drive source, and the worm 11 meshes with a worm wheel 12 fixed coaxially with the drive drum 7. Accordingly, the rotation of the motor 10 is reduced by the worm 11 and the worm wheel 12 and transmitted to the drive drum 7, the wire 9 is circulated, and the base plate 5 moves along the guide rail 3 from one surface side of the disk 2 shown in FIG. 5 so that the record needle of the pickup 4 located on the other surface of the disk 2 shown in FIG. 5 and moving integrally with the base plate 5 is detached from one surface of the disk 2 and automatically comes into contact with the other surface. Has become.

[0003]

However, in the above-mentioned conventional pickup reversing device, the drive mechanism for moving the base plate 5 having the pickup 4 along the guide rail 3 is complicated, and the number of parts is large. As a result, the number of assembling steps increases, complicated work is required, and the cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a disk player pickup reversing device having a simplified structure and a reduced number of components by using a self-propelled system in which a drive mechanism for the device is mounted on a base plate. It is.

[0005]

In order to achieve the above object, the present invention provides a U-shape with a curved portion and a straight portion,
It is equipped with guide rails in which straight parts on both sides are arranged on both sides of the disc, and a base plate on which a pickup is mounted and which selectively moves to the front and back of the disc along the guide rails without turning the disc over. In a pickup reversing device of a disc player capable of performing a reproducing operation on both sides of the guide rail, the guide rail forms a rack portion on a surface parallel to the disc recording surface at the linear portion and at the curved portion at the linear portion. While forming a rack portion that is continuous with both rack portions formed in,
The base plate is provided with a gear that meshes with the rack portion, a motor that rotationally drives the gear, and a holding portion that is in contact with the guide rail and that holds the meshing between the rack portion and the gear. By reverse rotation, the base plate is moved along the guide rails and selectively positioned on both sides of the disc.

Accordingly, the pickup is provided by the gear provided on the base plate meshing with the rack portion formed on the guide rail, and the holding portion contacting the guide rail to hold the meshing between the rack portion and the gear. By making the base plate movable with respect to the guide rail and providing the base plate with a motor that is a drive source of the gear, the base plate is guided along the guide rail by the rotational drive of the gear in accordance with the forward and reverse rotation of the motor. Even when it moves and is selectively positioned on both sides of the disk and the state is inverted upside down, it can stably run on its own.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view showing a pickup reversing device of a disc player according to an embodiment of the present invention, in which a pickup is located on one side of a disc, FIG. 2 is a right side view of FIG. 1, and FIG. FIG. 7 is a front view showing a state where the pickup is located on the other surface side of the disc in the pickup reversing device of the disc player.

In FIGS. 1 to 3, parts common to FIGS. 4 and 5 are denoted by common reference numerals.

The guide rail 13 has the same shape as the conventional one.
A rack part 13a is formed on the outer side surface of the rack part 13a.
a, the rotating shaft 15 of the gear 14 meshing with the base plate 5 is rotatably mounted, and the slide protrusion 5a of the base plate 5 is slidably abutted on the inner side surface of the guide rail 13. However, the slide protruding piece 5a and the gear 14 are used to hold the guide rail 13 from both inside and outside so that the guide rail 13 is stably moved even when the state of the guide rail 13 is turned upside down. The rotation of 14 causes the base plate 5 to move along the guide rail 13. A worm wheel 12 a is fixed to the rotating shaft 15 so as to rotate integrally with the gear 14, and the worm 11 fixed to the motor shaft 10 a of the driving source motor 10 fixed to the base plate 5. Are engaged with the worm wheel 12a.

The operation of the embodiment apparatus constructed as described above will be described. In the state where the pickup 4 shown in FIG.
Is operated to perform the reproduction operation on the other side of the motor 10.
Is driven to rotate, and this rotation is reduced by the worm 11 and the worm wheel 12a, and the worm wheel 12a
Gear 14 is rotated by the rotation shaft 15 of the worm wheel 2a.
As the gear 14 meshes with the rack portion 13a of the guide rail 13, the base plate 5 moves in the direction of the arrow in FIG. 1, and eventually, as shown in FIG. Located on the face side. At this time, the base plate 5
Is upside down when it is located on one side, but the base plate 5 is mounted in a state of gripping the guide rail 13 by the slide projection 5a and the gear 14, so that the base plate 5 moves stably without hindrance. I do.

Since this pickup reversing device is a self-propelled type in which the base plate 5 having the pickup 4 is provided with a driving mechanism for the base plate 5 itself, a wire moving type like the conventional device shown in FIGS. 4 and 5 is used. The wire 9, the reversing drum 6, the driving drum 7, and the guide pulley 8 are not required, and the worm wheel 12a can be made smaller in diameter than the wire-driven type, and the configuration is simplified and the number of assembly steps is reduced. However, the number of parts can be reduced and the cost can be significantly reduced. Further, there is an effect that the maintainability and the serviceability are improved with the simplification of the configuration.

[0013]

As described above, according to the present invention, the gear provided on the base plate is meshed with the rack portion formed on the guide rail, and the holding portion is in contact with the guide rail so that the rack portion and the gear mesh with each other. Since the base plate with the pickup is movable with respect to the guide rail by holding the motor, and the motor for rotating the gear is mounted on the base plate, the gear is driven to rotate in the forward / reverse rotation of the motor. This allows the base plate to move along the guide rails, providing a self-propelled pickup that can be selectively positioned on both sides of the disc. Moreover, it is a reversal for winding the wire compared to the conventional wire movement method. Drums, drive drums, guide pulleys, etc. are not required, and the number of parts can be reduced, and the number of assembly steps is reduced due to the simplification of the configuration, resulting in a large cost reduction. It is possible to achieve down.
In addition, the complicated work of winding the wire can be eliminated, and the simplification of the configuration improves the maintainability and the serviceability, thereby increasing the reliability.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a pickup is located on one side of a disc in a pickup reversing device for a disc player according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a front view showing a state where the pickup is located on the other surface side of the disc in the pickup reversing device of the disc player.

FIG. 4 is a front view showing a state where a pickup is located on one surface side of a disk in a pickup reversing device of a conventional disk player.

FIG. 5 is a front view showing a state in which the pickup has moved to the other surface side of the disc in the pickup reversing device of the disc player.

[Brief description of reference numerals]

 2 record board 4 pickup 5 base plate 10 motor 11 worm 12a worm wheel 13 guide rail 13a rack part 14 gear

Claims (1)

[Claims] 1. A curved portion and a straight portion form a U-shape,
Equipped with guide rails with straight parts on both sides on both sides of the disc, and a base plate on which the pickup is mounted and which can be selectively moved to the front and back of the disc along the guide rails without turning the disc over. In a pickup reversing device for a disc player capable of performing reproduction operations on both sides of the guide rail, the guide rail forms a rack portion on a plane parallel to the disc recording surface at the straight portion, and a straight portion at the curved portion. While forming a rack portion connected to both rack portions formed on the base plate, a gear meshing with the rack portion, a motor for rotating the gear, and the rack portion in contact with the guide rail are formed on the base plate. A holding portion for holding the mesh with the gear is provided, and the base plate is moved to the guide rail by the forward and reverse rotation of the motor. Along moved, the pickup reversing device of the disc player, characterized in that selectively positioned on both sides of the disk.