Title:
STEPPING MOTOR, LENS DEVICE, AND IMAGING APPARATUS
Document Type and Number:
Japanese Patent JP2017005995
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a silent stepping motor that, while maintaining drive torque characteristics, reduces striking sound emitted by a rotor magnet and a bearing part.SOLUTION: A stepping motor comprises: a rotor having a rotor magnet fixed to a rotary shaft; a plurality of coil bobbins with coils wound around them; a stator yoke group having a plurality of stator yokes, each of which surrounds each coil bobbin in the axial and radial directions of the rotary shaft and has pole teeth alternately arranged in a circumferential direction around the rotary shaft, so as to face a side of the rotor magnet; and a magnetic attraction generating member that attracts the rotor magnet in the axial direction of the rotary shaft by means of magnetic attraction. The axially central surface of the rotor magnet and the axially central surface of the stator yoke group coincide with each other.SELECTED DRAWING: Figure 5
Inventors:
ASANO KOTA
Application Number:
JP2016192778A
Publication Date:
January 05, 2017
Filing Date:
September 30, 2016
Export Citation:
Assignee:
CANON KK
International Classes:
H02K37/14; G02B7/08; G03B17/00; H02K5/167
Domestic Patent References:
| JPH10146014A | 1998-05-29 | |||
| JPH08149780A | 1996-06-07 | |||
| JP2009050149A | 2009-03-05 | |||
| JP2008005640A | 2008-01-10 |
Attorney, Agent or Firm:
Ryosuke Fujimoto
Atsushi Mizumoto
Hirayama Tomoya
Atsushi Mizumoto
Hirayama Tomoya