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Title:
MOTOR APPARATUS
Document Type and Number:
Japanese Patent JP2008263688
Kind Code:
A
Abstract:

To provide a motor apparatus which can suppress vibration by enhancing rigidity at a part where vibration is generated in primary mode.

A yoke 14 formed of a drum portion 14a and a bottom wall portion 14b is provided, at the opening thereof, with protrusions 14c and 14d protruding outward in the opposite directions perpendicular to the axis of rotation. Two magnets 15a and 15b are secured oppositely to each other to the inner circumferential surface of the drum portion 14a and symmetrically to a line connecting the pair of protrusions 14c and 14d. The maximum amplitude generating direction of the yoke 14 during rotation of the motor traverses the magnets 15a and 15b.


Inventors:
YASUNAKA TOMOHIKO
Application Number:
JP2007103468A
Publication Date:
October 30, 2008
Filing Date:
April 11, 2007
Export Citation:
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Assignee:
MITSUBA CORP
International Classes:
H02K5/24; H02K5/04; H02K23/04
Domestic Patent References:
JPH1051994A1998-02-20
JP2007014119A2007-01-18
JP2007006688A2007-01-11
JPH0998559A1997-04-08
JP2005020914A2005-01-20
JP2002247800A2002-08-30
JPH09224337A1997-08-26
Attorney, Agent or Firm:
Yamato Tsutsui
Yoshitaka Kozuka
Akiko Tsutsui