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Patent Searching and Data


Title:
SPINDLE MOTOR
Document Type and Number:
Japanese Patent JPH066963
Kind Code:
A
Abstract:

PURPOSE: To provide an excellent thin spindle motor in which rotor frame also serves as a clamp magnet yoke.

CONSTITUTION: A rotor frame 12 pressed from a magnetic material is press fit to a rotor shaft 1. A ring type protrusion 12a is provided on the plane part at the outside of the rotor frame 12 while a clamp magnet disc 14 is disposed on the inside of the protrusion 12a and a ring type spindle hub 13 is fixed to the outside of the protrusion 12a. Since the rotor frame 12 also serves as a clamp magnet yoke, an excellent spindle motor which is made thin by an amount corresponding to the board thickness of the clamp magnet yoke can be obtained.


Inventors:
Kawasaki, Shunichi
Abe, Yasushi
Application Number:
JP1992000157727
Publication Date:
January 14, 1994
Filing Date:
June 17, 1992
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G11B19/20; H02K23/40; H02K29/00; (IPC1-7): H02K23/40; G11B19/20
Attorney, Agent or Firm:
小鍜治 明 (外2名)