JPH02110050U

JPH02110050U -

Info

Publication number: JPH02110050U
Application number: JP1730189U
Authority: JP
Priority date: 1989-02-16
Filing date: 1989-02-16
Publication date: 1990-09-03

Description

[Brief explanation of the drawing]

第１図乃至第３図は本考案の一実施例を示す図
で、第１図は本考案のデイスクの回転駆動装置を
示す半断正面図、第２図はその要部断面図、第３
図はデイスクを装着した状態を示す同要部断面図
、第４図及び第５図は本考案の実施例を示す図で
、第４図はその要部断面図、第５図はデイスクを
装着した状態を示す同要部断面図、第６図乃至第
８図は従来のデイスクの回転駆動装置を示す図で
、第６図はその半断正面図、第７図はその要部断
面図、第８図はデイスクを装着した状態を示す同
要部断面図である。１……回転軸、３，３３，５３……ブツシユ、
５，３５，５５……マグネツト、７，３７，５７
……センタリングスピンドル、８……コイルバネ
、９，３９，５９……ターンテーブル、１１……
ロータヨーク、１３……ロータマグネツト、１５
……駆動コイル、１７……回路基板、１９，２１
……ラジアル軸受、２３……軸受ハウジング、２
８……スラスト軸受、４０……クランプ板、４１
……磁性板、４３……デイスク。 1 to 3 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a half-sectional front view showing the disk rotation drive device of the present invention, FIG. 2 is a sectional view of the main part thereof, and FIG.
The figure is a cross-sectional view of the same essential parts showing a state in which the disk is attached. Figures 4 and 5 are views showing an embodiment of the present invention. 6 to 8 are diagrams showing a conventional disk rotation drive device, FIG. 6 is a half-sectional front view thereof, FIG. 7 is a sectional view of the essential part, FIG. 8 is a sectional view of the same essential parts showing a state in which a disk is attached. 1... Rotation axis, 3, 33, 53... Bushu,
5, 35, 55...Magnet, 7, 37, 57
... Centering spindle, 8 ... Coil spring, 9, 39, 59 ... Turntable, 11 ...
Rotor yoke, 13...Rotor magnet, 15
... Drive coil, 17 ... Circuit board, 19, 21
... Radial bearing, 23 ... Bearing housing, 2
8... Thrust bearing, 40... Clamp plate, 41
...magnetic plate, 43...disc.

Claims

[Claims for Utility Model Registration] (1) A motor, fixed to the rotating shaft of the motor,
A turntable on which a disk is placed; a magnet fixed to the tip of the rotating shaft protruding from the turntable at a predetermined distance from the turntable; and a magnet between the turntable and the magnet. A disk rotation drive device comprising: a substantially disk-shaped centering spindle made of magnetic material arranged to be movable in parallel in the axial direction; (2) The disk rotation drive device according to claim 1, wherein the centering spindle is attracted to the magnet through an axial gap even when the disk is not attached.