JPH0636498A - Optical disk cartridge - Google Patents

Abstract

PURPOSE:To form the magnetic disk cartridge which can rotate at a high speed by constituting the cartridge attachably and detachably to and from a driver and aligning the center of an magnetic disk and the axial center of a spindle motor with high accuracy. CONSTITUTION:The spindle motor 12 is mounted in approximately the central part at the base in the flat cartridge 10 having a square or rectangular shape and the magnetic disk 11 is mounted on a revolving shaft 14 of this motor 12. A mounting part 30 mounted integrally with the revolving shaft 14 is screwed and fixed by a lock screw 31 to the central part of the magnetic disk 11 in such a manner that the center of the revolving shaft 14 and the center of tracks align to each other in such a case. The circumference of the rotor area on the inner side of the recording area of the magnetic disk 11 is provided thereon with a rotor disposed with plural sets of paired magnets of N and S. This rotor revolves the spindle motor 12 cooperatively with the stator inserted through the stator insertion window on the (back surface of the cartridge 10 from the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk cartridge.

[0002]

2. Description of the Related Art A conventional optical disk and a driver for driving the optical disk will be described with reference to FIG. A spindle motor 5 is provided in the driver 4, a chucking base 6 is attached to a shaft 5X of the motor 5, and a magnet is attached in the chucking base 6. When the optical disk 1 is loaded into the driver 4 and driven by the motor 5, the center hole 2 of the optical disk 1 is moved to the shaft 5X of the motor 5 of the driver 4.
The optical disk 1 is attached to the optical disk 1 and the metal hub 3 made of iron or the like, which is integrally attached to the optical disk 1 coaxially with the optical disk 1, is attracted to the magnet 7 of the chucking base 6.
Is positioned and attached to the shaft 5X of the motor 5. Thereby, the optical disc 1 can be attached to and detached from the driver.

[0003]

However, due to the tolerance of the diameter between the center hole 2 of the optical disc 1 and the shaft 5X of the motor 5, the optical disc 1 is eccentric due to backlash of chucking. This eccentricity has a drawback that the rotation speed of the optical disk cannot be increased so much due to the limitation of the capacity of the actuator.

In view of the above point, the present invention can be attached to and detached from the driver, and the center of the optical disk and the shaft center of the spindle motor can be aligned with high accuracy, thereby rotating at a higher speed than before. The purpose is to obtain a possible optical disc.

[0005]

The optical disk cartridge according to the first aspect of the present invention comprises an optical disk 11 and a spindle motor 12 to which the optical disk 11 is attached, which is housed in the cartridge 10. Then, the motor 12 in this cartridge 10
Then, a drive current is supplied from the outside to the optical disc 1
1 can be rotationally driven.

In the optical disk cartridge according to the second aspect of the present invention, an optical disk 21 integrally formed with a rotor 24 constituting a spindle motor in cooperation with an external stator 25 is mounted on a rotary shaft 28 in the cartridge 20. It is stored in. Then, the stator 25, which constitutes the spindle motor in cooperation with the rotor 24 of the optical disk 21, is opposed to the rotor 24 of the optical disk 21 in the cartridge 20, and a drive current is passed through the stator 25, whereby the optical disk 21 is rotationally driven. be able to.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment (1) of the present invention will be described in detail below with reference to FIGS. The disc cartridge of the embodiment (1) is loaded into a driver (not shown). A spindle motor 12 is attached to the central portion of the bottom surface of a flat cartridge 10 having a square or rectangular shape, and an optical disk 11 is attached to a rotation shaft 14 of the motor 12.
Is attached. In this case, as shown in FIG. 4, the center of the rotary shaft 14 and the center of the track should be aligned with each other.
The mounting portion 30 integrally mounted on the rotary shaft 14 is screwed and fixed to the center of the optical disk 11 with a fixing screw 31.

A window 13 for an optical pickup is formed on the upper surface of the cartridge 10, and a spindle motor driving lead 15 led out from the motor 12 is provided on the lower surface. Then, an external power source is connected to the lead 15.

Next, referring to FIGS. 2, 3 and 4, the embodiment (2) of the present invention will be described in detail. Example (2)
The disk cartridge is loaded in a driver (not shown). A rotary shaft 28 is rotatably attached to a substantially central portion of the bottom surface of the flat cartridge 20 having a square or rectangular shape via a bearing. Also in this case, as shown in FIG. 4, the mounting portion 30 integrally mounted on the rotating shaft 28 is fixed to the central portion of the optical disk 21 by the fixing screw 31 so that the center of the rotating shaft 28 and the center of the track coincide with each other. Secure with screws.

The recording area 22 of the optical disk 21
A rotor 24 in which a plurality of pairs of magnets N and S are arranged is provided on the circumference of a rotor area 24 inside the rotor, and a stator 25 is inserted from the outside through a stator insertion window 29 on the lower surface of the cartridge 20. The spindle motor is jointly constructed. The stator 25 is configured by winding a coil 26 around a U-shaped bobbin 27. A window 29 for an optical pickup is formed on the upper surface of the cartridge 20.

The driver supplies a drive current to a motor for rotating the optical disk cartridge to control the ON / OFF of the drive current, thereby recording and reproducing signals by the optical pickup.

[0012]

According to the present invention described above, it is possible to attach / detach it to / from the driver, and it is possible to align the center of the optical disk with the axis of the spindle motor with high accuracy. An optical disk cartridge that can be rotated can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view and a perspective view showing an optical disk cartridge of an embodiment (1) of the present invention.

FIG. 2 is a perspective view showing an optical disk of Example (2) and a sectional view showing an optical disk cartridge.

FIG. 3 is a bottom view of the optical disc cartridge according to the embodiment (2).

FIG. 4 is a sectional view showing a part of Examples (1) and (2).

FIG. 5 is a sectional view showing a conventional example.

[Explanation of symbols]

 10 Cartridge 11 Optical Disc 12 Spindle Motor 13 Optical Pickup Window 14 Rotating Shaft 15 Spindle Motor Driving Lead 20 Cartridge 21 Optical Disc 22 Recording Area 23 Rotor Area 24 Rotor 25 Stator 26 Coil 27 Bobbin 28 Rotating Shaft 29 Optical Pickup Window

Claims (2)

[Claims] 1. An optical disk cartridge comprising an optical disk and a spindle motor to which the optical disk is attached, housed in a cartridge. 2. An optical disk cartridge, characterized in that an optical disk integrally formed with a rotor constituting a spindle motor in cooperation with an external stator is housed in a cartridge in a state of being mounted on a rotating shaft.