JPH1064147A - Disk chucking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk chucking device having excellent operability and capable of attaching and detaching a disk without bearing loads on a drive main body and the disk, etc. SOLUTION: This device is composed of a turntable 25 for mounting the disk, pressing pawls 21 for fixedly supporting the disk, a center cam 22 for giving pressing force to the pressing pawls 21 so as to perform their fixedly supporting of the disk and pressing pawl springs 24 for making the pressing pawls 21 withdraw into the middle of the turntable 25 at the time of releasing the disk from its fixing. The turntable 25 is provided with projecting parts 27 for fixing the pressing springs 24. Torque of a spindle motor is transmitted from its spindle 23 to the center cam 22 to move the pressing pawls 21 in the direction of fixing the disk by utilizing different force of inertia, and at the time of releasing the disk form its fixing, torque in the reverse direction is given to the center cam 22 to bring the pressing pawls 21 back to their initial state by utilizing different force of inertia, thus eliminating loads at the time of attaching and detaching the disk.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk chucking device for mounting an optical disk and picking up stored information.

[0002]

2. Description of the Related Art In recent years, as a method for inserting an optical disk into an optical memory device, a caddy system in which a disk is placed in a cartridge called a caddy and then inserted into a main body, or a tray system in which only a tray is loaded and a disk is placed thereon is used. Have been. In addition, as optical memory devices have become smaller and thinner, a drawer system in which a pickup and the like are loaded from the main body together with a tray to mount media has been increasing. is there.

Hereinafter, a conventional disk chucking device will be described. FIG. 5 is a perspective view of the internal structure of a conventional optical memory device, and shows a drawer system which is one of the loading systems. FIG. 6 is an enlarged sectional view of the disk chucking device. In FIG.
1 is an upper cover of the optical memory device main body, 2 is a bottom cover of the optical memory device main body, 3 is a guide for storing and discharging the tray, and is a rail for supporting the tray at the time of discharging, 4 is a tray for mounting a disk, Reference numeral 5 denotes a ball chuck for mounting and fixing a disk, 6 an optical pickup for reading data from the disk, and 7 a main body substrate.

In FIG. 6, reference numeral 8 denotes a center cover that covers the entire disk chucking device, 9 denotes a disk on which data is recorded, 10 denotes a turntable on which the disk 9 is mounted, and 11 denotes a caulking of the turntable 10. A motor shaft serving as a central axis of rotation of the disk 9;
12 is an O-ring made of an elastic material, 13 is an O-ring
A ball (claw) that transmits the elastic force of the ring 12 to the disk 9 and fixedly supports the disk 9. In the conventional ball chucking, the ball 1 is always moved by the elastic force of the O-ring 12.
3, a pressing force is applied for fixing and supporting the disk.

[0005]

As a trend of optical memory device products, desktop computers are increasingly mounted on notebook computers, and miniaturization and thinning are regarded as important, and ball chucking is often used as a disk chucking method. Used. However, in this method, the pressing force for fixing and supporting the disk is always applied to the ball 13 as described above, so that not only is the load applied to the drive body or the disk when the disk is attached / detached, but also the operability and convenience are increased. Was also a problem.

It is an object of the present invention to provide a disk chucking device having excellent operability and convenience.

[0007]

A disk chucking device according to the present invention comprises a turntable on which a disk is placed, a pressing claw for fixing and supporting the disk, and a center cam for applying a pressing force to the pressing claw for fixing and supporting the disk. A press claw spring is provided to pull the press claw into the center of the turntable when the disc is released, and the turntable is provided with a projection for fixing the press spring.The press claw turns while centering the disc. A taper for fixed support on the table is provided, and a spindle shaft for transmitting the power of the spindle motor is mounted on the center cam, and the torque generated by the spindle motor and the spindle shaft are transmitted to the center cam,
The pressing claw is configured to move in the disk fixing direction due to a difference in inertia force.

[0008]

According to the present invention, the load at the time of loading / unloading the disk can be eliminated by switching the direction of applying the acceleration torque of the spindle motor between forward rotation and reverse rotation.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a disk chucking apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged front view of the disk when the disk is fixed, FIG. 3 is an enlarged front view of the disk when the disk is fixed, and FIG. It is an expanded sectional view at the time.

In FIG. 1, a center cover 20 covers the chucking device and is formed of a resin material. The pressing claw 21 is in direct contact with the disk, and fixedly supports the disk on the turntable while performing centering by the taper 21a, and is formed of a highly rigid material. The center cam 22 pushes the pressing claw 21 in the disk fixing direction by using a cam device.
a, a pressing surface 22b is provided, and is formed of a highly rigid material.

The spindle shaft 23 is a shaft for transmitting the torque of the spindle motor and is caulked to the center cam 22, and is formed of a metal material. The pressing claw spring 24 applies a spring force to move the pressing claw 21 to the center of the turntable, and is formed of a spring material. The turntable 25 is for mounting a disk, and is made of a highly rigid material. The rubber sheet 26 is adhered to the turntable 25 with an adhesive or the like, and performs an operation of reducing the slip of the disk by friction. The rubber sheet 26 is formed of a material having a high friction coefficient such as a rubber material. 27 is a protrusion.

The operation of the disk chucking device configured as described above will be described with reference to FIGS. FIG. 2 is a front view of the disk chucking device with the center cover 20 removed when the disk is unlocked. The unit of the center cam 22 and the spindle shaft 23 (center cam unit), the turntable 25, and the pressing claw are shown. The unit (turntable unit) 21 and the pressing claw spring 24 are, as shown in FIG.
The surface b is not in surface contact with the pressing claws 21, and all the pressing claws 21 are pushed in the direction of the arrow 29 by the spring force of the pressing claw spring 24. As a result, the disc does not come into contact with the pressing claw 21, so that the disc can be attached and detached without imposing a load on the drive body and the disc.

FIG. 3 is a front view of the disk chucking device with the center cover 20 removed when the disk is fixed. When the disk is fixed, the center cam unit is subjected to high acceleration with an arrow 30 (in the disk rotation direction). In the direction of the center cam unit and the turntable unit to take advantage of the difference in the inertial force.
As shown in (2), the pressing surface 22b is brought into surface contact with the pressing claw 21, and the pressing claw 21 is moved in the direction of the arrow 31. At this time, a stopper 22a is provided on the center cam 22, and the center cam 22 is fixed to the turntable unit as shown in FIG.

FIG. 4 is a cross-sectional view of the disk chucking device when the disk is fixed. The pressing claw 21 moved in the direction of arrow 31 in FIG. While performing, the disk 32 is fixedly supported on the turntable 25.

To release the fixing of the disk 32 again, the center cam unit is moved at a high acceleration by the arrow 2 in FIG.
8 (in the direction opposite to the disk rotation), the surface contact portion between the pressing surface 22b and the pressing claw 21 is shifted by utilizing the difference in the inertial force between the center cam unit and the turntable unit, and the state shown in FIG. To Here, the acceleration at the time of fixing and releasing the fixation of the disk must be higher than the acceleration required for acceleration / deceleration when reproducing the normal disk.

[0016]

According to the present invention, the direction of applying the acceleration torque of the spindle motor can be switched between forward rotation and reverse rotation so that the load at the time of loading and unloading of the disk can be eliminated, so that the operability and convenience are excellent. It is possible to give the user a high quality feel, and it is possible to reduce the size and thickness of the disk chucking device.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk chucking device according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of the disk chucking device according to the embodiment of the present invention when the disk is unlocked.

FIG. 3 is an enlarged front view of the disk chucking device according to the embodiment of the present invention when the disk is fixed.

FIG. 4 is an enlarged sectional view of the disk chucking device according to the embodiment of the present invention when the disk is fixed.

FIG. 5 is a perspective view of the internal structure of a conventional optical memory device.

FIG. 6 is an enlarged sectional view of a conventional disk chucking device.

[Explanation of symbols]

 Reference Signs List 20 center cover 21 pressing claw 21a taper 22 center cam 22a stopper 22b pressing surface 23 spindle shaft 24 pressing claw spring 25 turntable 26 rubber sheet 27 protrusion

Claims (1)

[Claims] 1. A turntable on which a disk is mounted, a pressing claw for fixing and supporting the disk, a center cam for applying a pressing force for fixing and supporting the disk to the pressing claw, and the pressing claw at the center of the turntable when the disk is unlocked. The turntable is provided with a protrusion for fixing the press spring, and the press claw is provided with a taper for fixing and supporting the turntable while centering the disc. The center cam is provided with a spindle shaft for transmitting the power of a spindle motor.The torque generated by the spindle motor is transmitted from the spindle shaft to the center cam, and the pressing pawl is moved by a difference in inertial force. The feature is that it is moved in the disk fixing direction. That disk chucking device.