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Spindle motor

A motor and mandrel technology, applied in instruments, recording information storage, controlling mechanical energy, etc., can solve the problems of increased quantity, increased production cost, difficulty in different requirements, etc., to achieve the effect of reducing assembly steps, easy loading and unloading

Inactive Publication Date: 2005-08-17
MINEBEA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Because the aforementioned alignment elements must be durable, in particular must be wear-resistant, to withstand frequent loading and unloading of discs, and the turntable, including the central guide portion, must also be precisely formed to the required dimensions, therefore , if the turntable and the center guide part are formed with the same resin material, it is difficult to meet the different requirements of these two elements
On the other hand, if the two parts are formed with different resin materials, the number of materials, components, and processing steps increases, thereby increasing production costs

Method used

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Embodiment Construction

[0021] Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0022] refer to figure 1 The spindle motor 2 of the embodiment of the present invention generally includes a motor assembly 31 composed of a rotating shaft 4, a stator 6, a rotor magnet 8, a rotor yoke 10 and a support 11, and also includes a turntable 12 and a bracket plate 14, and the core The shaft motor 2 is attached to the base plate 20 .

[0023] The rotor magnet 8 is a hollow cylindrical permanent magnet and is fixed to the inner circumference of the rotor yoke 10 which is fixedly connected to the rotary shaft 4 together with a turntable 12 .

[0024] The rotating shaft 4 is rotatably supported by a bearing 21 provided in a support 11 connected to the base plate 20 .

[0025] The stator 6 , which has a coil 23 wound therearound, is fixed to the support 11 and faces the inner circumferential surface of the rotor magnet 8 with a slight air gap between t...

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Abstract

A spindle motor capable of suppressing an increase in number of parts and reducing a man-hour for assembly, and having an automatic balancing mechanism and a disk centering function, comprising a motor part (31) for rotating a disk (30) used as a recording medium, a turn table (12) for mounting the disk (30), and a holder plate (14) installed on the lower part of the turn table (12), wherein spherical bodies (16) are disposed in an annular space (22) formed of the turn table (12) and the holder plate (14) to form the automatic balancing mechanism, and the disk (30) centering function is provided to a plurality of claw parts (5) formed at the center part of the holder plate (14).

Description

technical field [0001] The present invention relates to a spindle motor provided with a mechanism for self-balancing and centering a recording disc. Background technique [0002] When the spindle motor spins at high speed in an optical drive or other type of disc drive with an unbalanced loading of the recording disc, the disc drive vibrates, which can cause errors during recording to and from the disc , and this can also cause surrounding equipment to vibrate, resulting in malfunction. [0003] In order to solve the problem of disk drive vibration caused by the fact that the gravity point of the disk is not on the rotating shaft when the disk is loaded, Japanese Patent Application Publication No. JP2000308306A discloses a spindle motor, which is provided with a self-balancing mechanism , the balancing mechanism comprises a ring-shaped closed space and a ball adapted to move freely in the closed space, and the balancing mechanism works in such a way that the ball automatica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B17/028G11B19/20H02K7/04H02K15/16H02K21/22
CPCG11B19/2009G11B19/2027G11B17/0282H02K7/04H02K15/165G11B19/20G11B17/028H02K15/16
Inventor 松下晋武山胁孝之铃木克敏稻垣正明
Owner MINEBEA CO LTD
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