JP2833166B2 - Spindle for disk playback device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle for holding and rotating a disc in a disc reproducing apparatus of a system for projecting a light spot on a disc-shaped recording medium and reproducing information optically. It is.

2. Description of the Related Art In recent years, disc playback devices have become increasingly smaller, thinner, higher quality, and lower in price. Modules for each component have been used to stabilize quality, simplify assembly and service, and reduce size and thickness. And non-adjustment are desired.

In particular, in the case of compact disk reproducing devices, the demand for portable and on-vehicle devices is on a tremendous increase, and even higher quality and higher performance are required even under severe use conditions.

Hereinafter, the above-described conventional spindle for a disk reproducing apparatus will be described with reference to the drawings.

FIG. 3 is a schematic sectional view showing a spindle of a conventional disk reproducing apparatus.

In FIG. 3, 1 is a spindle motor having a shaft, 2 is a traverse base fixed to a motor mount described later, 3 is a turntable fitted to the shaft, and 4 is a centering ring for positioning a disk 14 described later. It is. 5 is a clamper magnet for attracting the clamp plate by magnetic force, holding the disc and attracting the motor mounting plate 9 by magnetic force, and suppressing rattling in the thrust direction of the spindle motor 1, and 6 is a magnet fixing for holding the clamper magnet. A plate 7 is a turntable spring for moving the centering ring 4 up and down, and a reference numeral 8 is a clamp plate for holding the disk 14. Reference numeral 9 denotes a motor mounting plate for mounting the spindle motor block to the traverse base 2 to suppress the play of the spindle motor 1 in the thrust direction. Reference numeral 10 denotes a motor mounting plate mounting screw for mounting the spindle motor block to the traverse base 2. Is a protective sheet for the upper surface of the disk 14, 12 is a motor mounting screw for mounting the spindle motor 1 to the spindle motor mounting plate 9, 13 is a clamper pin for fixing the clamper 8 to the clamper holding member, and 14 is a disk.

The operation of the conventional spindle for a disk reproducing apparatus configured as described above will be described below.

First, the traverse base 2 has a motor mounting plate mounting screw
10, a motor mounting plate 9 is mounted. Spindle motor 1 is attached to motor mounting plate 9 by motor mounting screws 12.
The turntable 3 is mounted on the spindle motor 1 with a high accuracy by a press-fitting method at a specified height. Inside the turntable 3, a centering ring 4 for centering the disk, a turntable magnet 5 bonded to the turntable 3, a turntable spring 7, and a magnet for preventing the centering ring 4 and the turntable magnet 5 from coming off. The disk 14 is clamped by attracting the clamp plate 8 by the magnetic force of the turntable magnet 5, and the turntable 3 is rotated at a predetermined rotation speed by the spindle motor 1.

Problems to be Solved by the Invention However, in the above configuration, since the length of the spindle motor shaft varies, it is necessary to penetrate the hole of the turntable 3 which is the fitting portion of the shaft of the spindle motor 1. If a load or impact in the thrust direction exceeding the holding force is applied to the press-fitting portion between the spindle motor 1 and the turntable 3 in the assembled state, the turntable 3 cannot be held at the specified height with the pressure holding force. However, the turntable 3 becomes lower than the prescribed height, and there is a problem that a normal disc cannot be played.

The present invention has been made in view of the above-described problems, and has high reliability in which the height of the turntable can be kept constant even when a load or impact greater than the press-fit holding force of the turntable is applied in the thrust direction of the shaft of the spindle motor. It is an object of the present invention to provide a spindle for a disk reproducing apparatus having the following.

Means for Solving the Problems In order to solve the above-mentioned problems, a spindle for a disc reproducing apparatus according to the present invention comprises a spindle motor for rotating a disc at a specified number of rotations, and a spindle motor having no gap. A spindle spacer fitted and mounted at a predetermined height, and a turntable press-fitted to the spindle spacer at an accurate height, wherein the spindle spacer has a flange at a lower end, Support the bottom surface of the turntable.

The present invention has the above configuration, and when a load or impact greater than the press-fit holding force is applied in the thrust direction of the press-fitting portion between the spindle spacer and the turntable, the flange portion of the spindle spacer supports the bottom surface of the turntable. , And the quality of the disc reproducing apparatus can be greatly improved.

Also, for the load and impact in the thrust direction, the height of the turntable, the press-fit holding force of the press-fit fitting part of the turntable and the spindle spacer fitted with no gap to the spindle motor shaft, and the spindle spacer The shaft is supported by the holding force due to the fitting between the shaft and the shaft, so that the press-fit holding force of the turntable can be reduced. Therefore, it is possible to reduce the input of the turntable pressure during the press-fitting of the turntable, and to reduce the deformation of the bearing portion of the spindle motor in the thrust direction, thereby greatly improving the dimensional accuracy and the quality of the product when assembling the disc reproducing apparatus. Can be done.

Embodiment Hereinafter, a spindle for a disk reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view showing the function of a disk reproducing apparatus spindle according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a spindle motor having a shaft, which has a shaft bearing 16. Reference numeral 2 denotes a traverse base fixed to a motor mounting plate 2 described later,
Is a turntable fitted to the shaft, and 4 is a centering ring for positioning the disk 14 described later. Reference numeral 5 denotes a clamper magnet for attracting the clamp plate by magnetic force and holding the disk, thereby attracting the motor mounting plate 9 by magnetic force and suppressing play in the thrust direction of the spindle motor 1, and 6 denotes a magnet fixing for holding the clamper magnet. A plate 7 is a turntable spring for moving the centering ring 4 up and down, and a reference numeral 8 is a clamp plate for holding the disk 14. Reference numeral 9 denotes a motor mounting plate for mounting the spindle motor block on the traverse base and suppresses play in the thrust direction of the spindle motor. Reference numeral 10 denotes a motor mounting plate mounting screw for mounting the spindle motor block to the traverse 2. 12 is a motor mounting screw for mounting the spindle motor 1 on the spindle motor mounting plate 9, 13 is a clamper pin for fixing the clamper 8 to the clamper holding member, 14 is a disk, and 15 is a disk of the spindle motor 1. This is a spindle spacer precisely shrink-fitted to a specified height on the shaft portion, and has a flange at the lower end.

The operation of the spindle for a disk reproducing apparatus of the present invention configured as described above will be described below with reference to FIG.

When assembling and replacing parts, a spindle motor block having a turntable 3 previously mounted at a predetermined height is mounted on the traverse base 2 to assemble.

At the time of performance, the clamper magnet 5 and the spindle motor mounting plate 9 attract each other by magnetic force, and the disk 14 rotates.

As described above, according to the present embodiment, the spindle spacer 15 is attached to the shaft portion of the spindle motor 1 that rotates the disk at the specified rotation speed at a specified height by shrink-fitting with high accuracy. By press-fitting the turntable 3 into the shaft, the height of the turntable can be accurately mounted even if the height of the spindle motor shaft varies, and the press-fitting portion between the spindle spacer 15 and the turntable is press-fitted in the thrust direction. Even when a load or impact greater than the holding force is applied, the height of the turntable can be held by the flange of the spindle spacer 15, and the quality of the disc reproducing apparatus can be greatly improved.

As shown in FIG. 2, the holding force of the turntable 3 can be further increased by adopting a structure in which the hole at the center of the turntable 3 comes in contact with the tip of the spindle spacer 15.

Effect of the Invention As described above, according to the present invention, a spindle spacer is fitted to a shaft portion of a spindle motor without a gap and mounted at a specified height, and a turntable is pressed into the spindle spacer at an accurate height. The flange provided at the lower end of the spindle supports the bottom surface of the turntable, so that even when a load or impact greater than the press-fit holding force is applied in the thrust direction of the press-fit fitting portion between the spacer and the turntable, the spacer can be used. The height of the turntable can be maintained by the flange, and the quality of the spindle for a disk reproducing device can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a spindle for a disk reproducing apparatus according to a first embodiment of the present invention, FIG. 2 is a schematic sectional view of a spindle for a disk reproducing apparatus according to a second embodiment of the present invention, and FIG. FIG. 4 is a schematic cross-sectional view of a conventional spindle for a disk reproducing device. 1 ... Spindle motor, 14 ... Disc, 15 ... Spindle spacer.

Claims (1)

(57) [Claims] 1. A spindle motor for rotating a disk at a specified number of revolutions, a spindle spacer mounted at a specified height of a shaft of the spindle motor, and a turntable press-fitted to the spindle spacer at an accurate height. Wherein the spindle spacer has a flange at a lower end, and the flange supports a bottom surface of the turntable.