JPS6334132Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE PRESENTLY PREFERRED EMBODIMENTS The present invention relates to a disk detection device that has been developed to reduce costs.

Recently, digital audio discs have been provided to improve the sound quality of conventional analog discs, but a compact disc player is required to play these digital audio discs.

Figure 1 particularly shows the disc detection mechanism of such a compact disc player, where 1 is a chassis, 2 is a motor provided on the bottom of the chassis, and 3 is a motor 2 mounted on the top of the chassis 1, which is rotatable. A platter 4 for supporting the provided disk is a support plate fixed to the upper surface of the chassis 1, and an L-shaped clamper support 6 is rotatably attached to the support plate 4 via a pin 5. 7 is a clamper guide fixed to one end of the clamper support base 6; 8 is a clamper movably provided in the clamper guide 7 so as to face the platter 3; 9 is a disk holder; 10 is a clamper receiver. , 11 is a disk to be mounted on the platter 3, 12 is a spring provided between the chassis 1 and the clamper support 6, 13 is a light emitting element provided on the upper surface of the chassis 1, and 14 is a light emitting element provided on the chassis 1. 15 is a light-receiving element provided with the disk 11 interposed at a position facing the light-emitting element 13 on the support 14; 16 is a cam; 17 is a pin;
18 is the center pole.

In the above structure, the presence or absence of the disk 11 on the platter 3 is optically detected by the light emitting element 13 and the light receiving element 15, and when the presence of the disk is detected, the cam 16 moves to the right to support the clamper. The table 6 starts rotating counterclockwise using the pin 5 as a fulcrum. When the clamper support base 6 finishes rotating, the clamper 8 (disc holder 9) presses the disc 11 due to the biasing force of the spring 12, so the clamper 8, disc 11, and platter 3 start rotating integrally, and the disc regenerates. will be held.

However, in such a conventional structure, since the presence or absence of a disk is detected by optical means, there is a drawback that an increase in cost is unavoidable.

The present invention was devised to eliminate the above-mentioned drawbacks, and aims to provide a detection mechanism using mechanical means in place of the conventional optical means. a platter rotatably provided on the chassis; an L-shaped clamper support rotatably attached via a pin to a support plate fixed on one side of the chassis;
The clamper support includes a clamper movably provided at one end of the clamper support so as to face the platter, and a micro switch provided on the ground of the chassis, and the L-shaped clamper support is supported using the pin as a fulcrum. When lowering the clamper onto the platter by rotating it in one direction,
If there is no disk on the platter, rotate the L-shaped clamper support an extra angle corresponding to the thickness of the disk, and operate the micro switch using the other end of the L-shaped clamper support. This is in a disk detection device that is configured so that the platter does not rotate.

Hereinafter, a disk detection device according to an embodiment of the present invention will be explained with reference to FIG.

In FIG. 2, the same parts as in FIG. The micro switch 19 is set in advance so that it does not operate when a disk is present, and is set to operate only when a disk is absent to control the platter so as not to rotate.

First, when the disk 11 is mounted on the platter 3, the cam 16 moves to the right and the L
The letter-shaped clamper support base 6 begins to rotate counterclockwise. Since the microswitch 19 is not operated under the above-mentioned setting conditions, the presence of a disk is detected and the clamper 8, disk 11, and platter 3 are rotated integrally, so that a disk reproducing operation is performed.

Next, when no disk 11 is mounted on the platter 3, the clamper support 6 rotates an additional angle corresponding to the thickness of the disk, and the other end of the clamper support 6 also rotates an additional amount counterclockwise and comes into contact with the contact of the microswitch 19. As a result, the microswitch 19 operates, and the absence of a disk is detected according to the above-mentioned set conditions. This controls the platter 3 so that it does not rotate.

As is clear from the above description, according to the present invention, a micro switch is provided and the micro switch is set to turn on and off in advance according to the rotation angle of the clamper support base, thereby mechanically determining the presence or absence of a disk. Since it is configured to detect, the detection mechanism can be simplified and costs can be reduced.

[Brief explanation of the drawing]

FIGS. 1 and 2 are schematic cross-sectional views showing conventional and embodiments of the present invention. 1...Syasee, 3...Pratstur, 6...
Clamper support stand, 8... Clamper, 11...
Disk, 12... Spring, 19... Micro switch.

Claims (1)

[Scope of utility model registration request] A platter is rotatably provided on one side of the chassis, and an L is rotatably attached via a pin to a support plate fixed on one side of the chassis.
A clamper support base, a clamper movably provided at one end of the clamper support base to face the platter, and a micro switch provided on the other surface of the chassis, with the pin as a fulcrum. When the clamper is lowered onto the platter by rotating the L-shaped clamper support in one direction, if there is no disk on the platter, the L-shaped clamper support is rotated by an angle corresponding to the thickness of the disk. 1. A disk detecting device characterized in that the micro switch is operated by the other end of the L-shaped clamper support by rotating the platter so that the platter does not rotate.