JPS643315A - Bearing device - Google Patents

Bearing device

Info

Publication number
JPS643315A
JPS643315A JP15900587A JP15900587A JPS643315A JP S643315 A JPS643315 A JP S643315A JP 15900587 A JP15900587 A JP 15900587A JP 15900587 A JP15900587 A JP 15900587A JP S643315 A JPS643315 A JP S643315A
Authority
JP
Japan
Prior art keywords
housing
locating surface
magnet
constitution
accuracy
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
JP15900587A
Other languages
Japanese (ja)
Inventor
Katsuhiko Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
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 by NSK Ltd filed Critical NSK Ltd
Priority to JP15900587A priority Critical patent/JPS643315A/en
Publication of JPS643315A publication Critical patent/JPS643315A/en
Pending legal-status Critical Current

Links

Landscapes

  • Sliding-Contact Bearings (AREA)
  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To let a magnetic disc be installed and/or removed smoothly as well as to improve the accuracy in rotation at low cost by arranging a guide surface and a locating surface continuously in a housing, and coupling the magnetic disc with the locating surface so as to be held by a stationary shaft via a fluid bearing. CONSTITUTION:A cylindrical hole 22 is formed at the shaft center section of a housing 21, a spherical body 25 is press-fitted onto the upper section thereof, and the inner circumference of the cylindrical hole 22 is formed with radial bearing surfaces 23 and 24 for a dynamic pressure fluid bearing. In addition, the upper section of the housing 21 is formed with a locating surface 28 wherein a magnetic disk is continuously coupled with a truncated cone shaped guide surface 27 so as to install a center core hold magnet 6 for fixing a rotor magnet 9 underneath thereof. This constitution therefore enables the magnet disc to be installed and/or removed smoothly, thereby enabling the accuracy in rotation to be improved at low cost.
JP15900587A 1987-06-26 1987-06-26 Bearing device Pending JPS643315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15900587A JPS643315A (en) 1987-06-26 1987-06-26 Bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15900587A JPS643315A (en) 1987-06-26 1987-06-26 Bearing device

Publications (1)

Publication Number Publication Date
JPS643315A true JPS643315A (en) 1989-01-09

Family

ID=15684157

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15900587A Pending JPS643315A (en) 1987-06-26 1987-06-26 Bearing device

Country Status (1)

Country Link
JP (1) JPS643315A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392500A2 (en) * 1989-04-12 1990-10-17 Ebara Corporation Spindle motor
JPH0547100A (en) * 1991-08-13 1993-02-26 Matsushita Electric Ind Co Ltd Flexible disk
JPH1069714A (en) * 1997-08-11 1998-03-10 Nippon Seiko Kk Bearing device for magnetic disk
US6507555B1 (en) 1996-07-19 2003-01-14 Matsushita Electric Industrial Co., Ltd. Balanced disk drive apparatus
JP2008005251A (en) * 2006-06-22 2008-01-10 Yoshinori Kanno Oscillation circuit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0392500A2 (en) * 1989-04-12 1990-10-17 Ebara Corporation Spindle motor
JPH0547100A (en) * 1991-08-13 1993-02-26 Matsushita Electric Ind Co Ltd Flexible disk
US6507555B1 (en) 1996-07-19 2003-01-14 Matsushita Electric Industrial Co., Ltd. Balanced disk drive apparatus
US6704271B2 (en) 1996-07-19 2004-03-09 Matsushita Electric Industrial Co., Ltd. Disk drive apparatus
US6711116B2 (en) 1996-07-19 2004-03-23 Matsushita Electric Industrial Co., Ltd. Balanced disk drive apparatus
KR100434917B1 (en) * 1996-07-19 2004-08-16 마쯔시다덴기산교 가부시키가이샤 Balancer for disk drives
JPH1069714A (en) * 1997-08-11 1998-03-10 Nippon Seiko Kk Bearing device for magnetic disk
JP2008005251A (en) * 2006-06-22 2008-01-10 Yoshinori Kanno Oscillation circuit

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