JP2557739Y2 - 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 disk player, and more specifically, converts digital or analog information such as music or video into digital signals and records the information on both sides of the disk, or reproduces the recorded information on the disk. Related to disc players.

[0002]

2. Description of the Related Art Conventionally, this type of disc player includes:
A disk has been proposed in which a disk is horizontally supported by a turntable, and the same pickup is moved in a symmetrical posture on the upper and lower surfaces of the disk to read information on the upper and lower surfaces of the disk.

An outline of a disk player having the above-mentioned conventional structure will be described with reference to FIG. First, in FIG. 2, 1 is a box-shaped main unit case, 2 and 3 are upper and lower deck chassis integrally connected in a side view U shape inside the main unit case 1, and 4 is fixed to the lower deck chassis 3. Turntable motor, 5
Is an output shaft of the turntable motor 4, 6 is a turntable fixed to the upper end of the motor output shaft 5, and 7 is a large-diameter LD.
(Laser disc) to a disc which is an information recording medium such as a small-diameter CD (compact disc); 8 is a chuck plate which is vertically movable by a chuck arm (not shown);
Is fixed, and the desk 7 is rotated integrally with the turntable 6.

A pickup table 10 having a pickup 9 and a disk 7
And upper and lower pickup guides 11 and 12 for moving and guiding the pickup table 10 on both upper and lower sides. The front ends of the upper and lower pickup guides 11 and 12 are connected to the upper and lower deck chassis 2 and 3 by tilt adjusting fulcrum shafts 13 and 14. It is mounted so that it can swing up and down. The pickup table 10 can be moved to both upper and lower sides of the disk 7 via a turn carriage 15 provided between the upper and lower pickup guides 11 and 12.

[0005]

However, in a double-sided reproducing player of the disk 7, like the above-mentioned conventional disk player, a position detecting limit switch for detecting the inner peripheral position of the pickup 9 on the upper and lower surfaces of the disk 7. Are required on both the upper and lower surfaces of the disk 7, respectively. For this purpose, the position detecting limit switches 16 and 17 for detecting the inner peripheral position of the pickup 9 must be installed on the drive bases of the upper and lower deck chassis 2 and 3, respectively, which increases the cost and the wiring of the circuit. There were problems such as complexity and an increase in the number of assembly steps.

According to the present invention, in order to solve the above-mentioned problems of the conventional structure, the number of position detection limit switches is set by installing a limit switch for detecting the inner peripheral position of the pickup in a disc double-sided player. It is an object of the present invention to provide a disc player for reducing the cost and cost.

[0007]

In order to achieve this object, according to the disc player of the present invention, a double-sided reproducing player for moving a pickup to both upper and lower sides of a disc placed on a turntable. A limit switch for detecting the inner peripheral position of the pickup is installed on a pickup table provided with the pickup, and a stopper for contacting the contact point of the limit switch is provided on a pickup guide on both upper and lower surfaces of the disk on which the pickup table moves. It is characterized by the following.

[0008]

Therefore, in the disk player of the present invention thus configured, the limit switches for detecting the positions of the pickups on the upper and lower sides of the disk are installed on the pickup table, so that the pickups respectively move to the upper and lower sides of the disk. However, the inner peripheral position of the pickup can be accurately detected. In addition, the number of limit switches for detecting the position of the pickup is reduced by one compared with the conventional disk player, so that the cost can be significantly reduced, the circuit wiring is simplified, and the number of assembly steps is reduced. it can.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a side sectional view of a main part showing a schematic configuration of a disk player according to the present invention. The same parts corresponding to those of a conventional disk player are denoted by the same reference numerals. First, in FIG. 2, reference numeral 1 denotes a box-shaped main body case. Inside the main body case 1, upper and lower deck chassis 2 and 3 integrally connected in a side view U-shape are fixed. Turntable motor 4 on lower deck chassis 3
Is fixed. In addition, the turntable motor 4
A turntable 6 is fixed to the upper end of the output shaft 5 of this embodiment. The turntable 6 has a disk 7 which is an information recording medium such as a large-diameter LD (laser disk) to a small-diameter CD (compact disk). It can be put on. The disk 7 placed on the turntable 6 is fixed from the upper surface by a chuck plate 8 movably supported by a chuck arm (not shown), and is configured to rotate the desk 7 integrally with the turntable 6. ing.

A pickup table 10 having a pickup 9 and a disk 7 are provided in the case 1 of the apparatus.
And upper and lower pickup guides 11 and 12 for moving and guiding the pickup table 10 on both upper and lower sides. The front ends of the upper and lower pickup guides 11 and 12 are connected to the upper and lower deck chassis 2 and 3 by tilt adjusting fulcrum shafts 13 and 14. It is mounted so that it can swing up and down. A turn carriage 15 for moving the pickup table 10 to the upper and lower surfaces of the disk 7 is provided between the upper and lower pickup guides 11 and 12, and a rear plate 16 fixed to the rear surfaces of the upper and lower deck chassis 2 and 3 has a center plate. The turn carriage 15 is mounted via pins 17, and the pickup carriage 10 held by the turn carriage 15 is moved up and down between the upper and lower surfaces of the disk 7 by rotating the turn carriage 15 between the upper and lower surfaces of the disk 7. It is configured to be able to move to the side in a symmetrical posture.

On the other hand, a position detecting limit switch 25 for detecting the inner peripheral position of the pickup 9 is provided at a predetermined position in front of the pickup table 10 where the pickup 9 advances toward the center of the disk 7. ,
A contact 2 of a limit switch 25 is provided on the tilt adjustment fulcrum shafts 13 and 14 of the upper and lower pickup guides 11 and 12.
Stoppers 26 and 27 with which 5a contacts are fixed.
Then, the pickup table 10 moves along the upper and lower pickup guides 11 and 12 to reach the inner peripheral positions of the upper and lower surfaces of the disk 7, and the limit switch 25.
The inner peripheral position of the pickup 9 can be detected when the contact 25a contacts the stoppers 26 and 27.

Reference numerals 18 and 19 in the figure denote pickup rails on which the pickup table 10 slides, 20 denotes a drive gear for rotatingly driving the turn carriage 15, and 21 denotes a position when the pickup table 10 is moved to both upper and lower sides of the disk 7. Of the turn carriage 15 are shown.

According to the embodiment of the present invention thus constructed, the pickup table 10 moves along the upper and lower pickup guides 11 and 12 during the reproducing operation of the disc player, so that the inner side of the upper and lower sides of the disc 7 can be moved. When the peripheral position is reached, the contact 25a of the limit switch 25 installed on the pickup table 10 comes into contact with each of the stoppers 26 and 27, and the inner peripheral position of the pickup 9 can be accurately detected.

[0015]

As described in detail above, according to the disk player of the present invention, one limit switch for detecting the position of the pickup on both the upper and lower sides of the disk is provided on the pickup table. Even when the pickup moves to both sides, the inner peripheral position of the pickup can be accurately detected. Further, since one limit switch for detecting the position of the pickup is reduced by one compared with the conventional disk player, it is possible to greatly reduce the cost, simplify the circuit wiring, and reduce the number of assembling steps. .

[Brief description of the drawings]

FIG. 1 is an explanatory side view of a main part showing a schematic configuration of a disc player according to the present invention.

FIG. 2 is an explanatory side view of a main part showing a schematic configuration of a disc player having a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 This case 2 Upper deck chassis 3 Lower deck chassis 6 Turntable 7 Disk 9 Pickup 10 Pickup stand 11 Upper pickup guide 12 Lower pickup guide 25 Limit switch 26, 27 Stopper

Claims (1)

(57) [Scope of request for utility model registration] 1. A double-sided reproducing player for moving a pickup to both upper and lower sides of a disk placed on a turntable, wherein a limit switch for detecting an inner peripheral position of the pickup is provided on a pickup table provided with the pickup. A disc player, wherein stoppers for contacting the contacts of the limit switch are provided on pickup guides on both upper and lower sides of the disc on which the pickup table moves.