JPS6226835Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a recording medium support device, particularly a PCM,
This invention relates to improvements in the clamping mechanism of audio discs and video discs. In recent years, in playback devices that read information from recording medium disks, the rotational speed of the disk is extremely high, so unless the disk is clamped to the drive motor shaft, slipping and shaking occur, making it impossible to accurately retrieve information.

In the past, various types of clamping devices have been proposed, but typical ones include those that use the magnetic force of a magnet to fix the device, and those that mechanically clamp the device by inserting a fixture into the spindle. It was hot.

However, all of these clamp devices require the power of a plunger or the like to remove the fixing device, or have complicated structures because they are attached and detached against magnetic force.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording medium support device that has a simple structure and excellent clamping properties, in order to eliminate the above-mentioned conventional drawbacks.

Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2, the support device consists of a base member 1, a sliding table 2, a movable member 3, and a clamp member 4, the base member 1 being rotatably fixed to the shaft 6 of a motor 5, It has a pillar 7 at the center of rotation, and a plurality of windows 8 are bored in the side wall 1a. The movable member 3 has one end rotatably supported by the tip of a column 7 in the base member 1, and a weight 3b is fixed to the tip of an arm 3a extending from a window 8 of the base member 1.

The sliding table 2 is vertically slidably inserted into the groove 9 of the base member 1, and its lower end is regulated by the arm 3a of the movable member 3. In addition, sliding table 2
A spindle 10 is provided at the upper end of the rotation center. The clamp member 4 is located on the rotation center line of the base member 1 and the sliding table 2, has a spindle engagement hole 11 bored in its lower surface, and is rotatably supported.

In the supporting device configured as described above, first, the disk 12 is placed on the sliding table 2, and when the drive motor 5 is rotated, the base member 1 and the sliding table 2 are moved.
The movable member 3 and the disk 12 rotate together, and the weight 3b of the movable member 3 rises to the vicinity of the head of the column 7 due to centrifugal force. As shown in FIG. 2, the sliding table 2 whose lower end is regulated by the arm 3a rises and presses the disk 12 against the clamp member 4.
Therefore, the force with which the clamp member 4 and the sliding table 2 press against the disk 12 increases in proportion to the rotational speed of the motor 5, and the disk 12 is held and fixed more reliably.

In this way, the present invention does not require the use of magnets or mechanical clamping devices when clamping the disk, but simply places the disk on the sliding table 2 and rotates it, and the disk is automatically fixed using centrifugal force. I can do it.

As another embodiment of the present invention, as shown in FIG. 3 and FIG. has been erected.

In the disc clamp device configured as described above, when the disc 12 is mounted on the centering member 14 on the turntable 13 and the drive motor 5 is rotated, the inverted weight 15 buckles due to centrifugal force, and due to the weight's own weight. The disk 12 is pressed and fixed.

Even with such a configuration, the disk can be automatically clamped by centrifugal force.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the main parts of the present invention, FIG. 2 is a cross-sectional view showing its operating state, FIG. 3 is a front view showing another embodiment of the present invention, and FIG. It is a front view showing the operating state. 1... Foundation member, 1a... Side wall, 2... Sliding table, 3... Movable member, 3a... Arm, 3b...
Weight, 4... Clamp member, 5... Motor, 7
... Pillar, 8 ... Window, 9 ... Groove, 10 ... Spindle, 12 ... Disc, 13 ... Turntable, 14 ... Centering member, 15 ... Inverted weight.

Claims (1)

[Scope of utility model registration request] A recording medium playback device includes a motor, a recording medium mounting section rotated by the motor, one end of which is held movably in the direction of the rotation axis of the motor by a member rotated by the motor, and a weight at the other end. When the motor rotates, the other end of the movable member moves in the direction of the outer circumference of the recording medium placed on the mounting portion, and also moves in the direction of the recording medium due to centrifugal force. Also, it does not seem to move,
A support device for a recording medium, characterized in that the recording medium is clamped by a force of movement of the movable member in the direction of the recording medium.