JPS62140877U - - Google Patents

Info

Publication number
JPS62140877U
JPS62140877U JP2525186U JP2525186U JPS62140877U JP S62140877 U JPS62140877 U JP S62140877U JP 2525186 U JP2525186 U JP 2525186U JP 2525186 U JP2525186 U JP 2525186U JP S62140877 U JPS62140877 U JP S62140877U
Authority
JP
Japan
Prior art keywords
rotor
drive motor
disk drive
rigid disk
rotor magnet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2525186U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP2525186U priority Critical patent/JPS62140877U/ja
Publication of JPS62140877U publication Critical patent/JPS62140877U/ja
Pending legal-status Critical Current

Links

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本考案が適用されるリジツトデイスク
ドライブモータの断面図、第2図は本考案の一実
施例の断面図、第3図および第4図は本考案の別
の実施例の各例を示す断面図、第5図は従来例の
回転子の断面図である。 1……回転軸、2……スピンドル、3……フロ
ツピーデイスク、6……固定子、10……回転子
、11……回転子ヨーク、12……回転子マグネ
ツト、13……円弧状凹溝、14a,14b,1
4c……小孔、15……円弧状凹溝。
FIG. 1 is a sectional view of a rigid disk drive motor to which the present invention is applied, FIG. 2 is a sectional view of one embodiment of the present invention, and FIGS. 3 and 4 are sectional views of other embodiments of the present invention. FIG. 5 is a cross-sectional view of a conventional rotor. 1... Rotating shaft, 2... Spindle, 3... Floppy disk, 6... Stator, 10... Rotor, 11... Rotor yoke, 12... Rotor magnet, 13... Arc-shaped concave Groove, 14a, 14b, 1
4c...small hole, 15...circular groove.

Claims (1)

【実用新案登録請求の範囲】 1 フロツピーデイスクを支持するスピンドルを
回転させる回転軸と、 固定子の周りを回転するように前記回転軸に取
り付けられた回転子コアと、 前記固定子と一定のギヤツプを有して前記回転
子コアの内面に固着された回転子マグネツトとを
備えてなり、 前記回転子マグネツトが前記回転子コアの内面
の全面を覆うリング状に形成されると共に、円周
方向の厚みを漸次変化させる肉薄部分が定間隔で
形成されていることを特徴とするリジツドデイス
クドライブモータの回転子。 2 前記薄肉部分が前記回転子マグネツトの外周
面に形成された複数の円弧状凹溝である実用新案
登録請求の範囲第1項記載のリジツドデイスクド
ライブモータの回転子。 3 前記肉薄部分が径が異なるように前記回転子
マグネツト内に形成された複数の小孔である実用
新案登録請求の第1項記載のリジツトデイスクド
ライブモータの回転子。 4 前記薄肉部分が前記回転子マグネツトの内周
面に形成された複数の円弧状凹溝である実用新案
登録請求の範囲第1項記載のリジツトデイスクド
ライブモータの回転子。
[Claims for Utility Model Registration] 1. A rotating shaft for rotating a spindle that supports a floppy disk, a rotor core attached to the rotating shaft so as to rotate around a stator, and a fixed portion connected to the stator. a rotor magnet fixed to the inner surface of the rotor core with a gap, the rotor magnet is formed in a ring shape covering the entire inner surface of the rotor core, and A rotor for a rigid disk drive motor, characterized in that thin portions are formed at regular intervals so that the thickness of the rotor gradually changes. 2. The rotor of a rigid disk drive motor according to claim 1, wherein the thin portion is a plurality of arcuate grooves formed on the outer peripheral surface of the rotor magnet. 3. The rotor of a rigid disk drive motor according to claim 1, wherein the thin portions are a plurality of small holes formed in the rotor magnet so as to have different diameters. 4. The rotor of a rigid disk drive motor according to claim 1, wherein the thin portion is a plurality of arcuate grooves formed on the inner peripheral surface of the rotor magnet.
JP2525186U 1986-02-24 1986-02-24 Pending JPS62140877U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2525186U JPS62140877U (en) 1986-02-24 1986-02-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2525186U JPS62140877U (en) 1986-02-24 1986-02-24

Publications (1)

Publication Number Publication Date
JPS62140877U true JPS62140877U (en) 1987-09-05

Family

ID=30825226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2525186U Pending JPS62140877U (en) 1986-02-24 1986-02-24

Country Status (1)

Country Link
JP (1) JPS62140877U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008862A1 (en) * 2003-07-22 2005-01-27 Aichi Steel Corporation Ltd. Thin hybrid magnetization type ring magnet, yoke-equipped thin hybrid magnetization type ring magnet, and brush-less motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005008862A1 (en) * 2003-07-22 2005-01-27 Aichi Steel Corporation Ltd. Thin hybrid magnetization type ring magnet, yoke-equipped thin hybrid magnetization type ring magnet, and brush-less motor
CN100380779C (en) * 2003-07-22 2008-04-09 爱知制钢株式会社 Thin hybrid magnetization type ring magnet,yoke-equipped thin hybrid magnetization type ring magnet,and brush-less motor

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