JPS6017087Y2 - Disc drive device - Google Patents

Description

[Detailed explanation of the invention] In magnetic disks, a disk is rotated at a predetermined speed,
In this state, writing is performed on the sheet on the disk, or signals are read from the sheet on the disk.The present invention relates to a disk drive device for rotating the disk at a predetermined speed. While contributing to miniaturization, it is also possible to improve the rotation accuracy of the disc.

Generally, this type of driving device includes one in which a disc is driven by a belt drive, and one in which the disc is directly connected to the rotating shaft of a motor.

In the former case, special measures must be taken to avoid the phenomenon of slippage caused by the belt drive.

Furthermore, it is necessary to provide at least two parts that hold the rotating shaft including the motor, and there is a limit to miniaturization.

In the latter case, since it is a direct connection type, the vibration of the motor is applied to the disk, which has a disadvantage in that it has an adverse effect on writing and reading.

The present invention eliminates such drawbacks, and will be explained below with reference to an embodiment of the drawings. 1 is a motor fixed to a housing 3 by a screw 2, 4 is the same rotating shaft, 5 is a motor bearing, and 6 is a bearing preload spring. It is.

In this case, a mounting plate 8 having a bearing 7 on the inside is attached to a part of the housing 3 corresponding to the rotating shaft 4 of the motor 1 with screws 9.

Reference numeral 10 denotes a holding plate that holds the bearing 7 on the mounting plate 8, and is fixed to the mounting plate 8 with screws 11.

12 is sized to be inserted into the bearing 7, and has a rotating shaft 4 in the center.
18 is a nut for fixing to the bearing 7 and spindle shaft 12 and applying extra pressure to the bearing 7; 13 is a holding part (not shown) such as a magnetic disc (sheet); The spindle shaft 12 is connected by a screw 14 to a disc having a
installed on.

15 is an elastic coupling having an elastic part 151 in the center and coupling fittings 152, 153 on both sides of the elastic part 151;
6.17 so that it can be attached to the disc 13 and the rotating shaft 4.

Here, to briefly explain the operation of this configuration, the spindle shaft 12 is rotatable with respect to the mounting plate 8 by the bearing 7, and if the coaxial shaft 12 rotates, the integral disc 13 also rotates by the screw 14. in a state.

On the other hand, the rotary shaft 4 of the motor 1 protrudes from the spindle shaft 12, and since an elastic coupling 15 is fixed here with a screw 17, the disc 13 is inserted through the coupling 15.
will be rotated.

Therefore, the eccentricity and deviation in height accuracy of the rotating shaft 4 can be absorbed by the elastic coupling 15, and vibrations in the rotational direction of the rotating shaft 4 can be absorbed by the elastic coupling 15, increasing the rotational precision of the disc. Furthermore, a disk 13 is placed on the rotating shaft 4.
can be installed to contribute to miniaturization.

[Brief explanation of the drawing]

The drawing is a sectional side view of a main part of a disc drive device according to an embodiment of the present invention. 1...Motor, 4...Rotating shaft, 7...
... Bearing, 12 ... Spindle shaft, 13.
...Elastic coupling.

Claims (1)

[Scope of utility model registration request] A disk is attached to a spindle shaft that has a hole into which the rotating shaft of the motor is inserted, and is rotatably supported by bearings on the outer periphery, and both ends are attached to the rotating shaft and the disk, so that the rotation of the rotating shaft is controlled in a circular manner. A disk drive device equipped with an elastic coupling that transmits power to the plate.