Title:
STEPPING MOTOR
Document Type and Number:
Japanese Patent JP2014204590
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a stepping motor in which degradation of performance can be prevented by preventing a yoke from being deformed by the injection molding pressure during insert molding, thereby making the driving sound quieter.SOLUTION: Molten synthetic resin is injected from each gate 23A3, 23B3, 24A3, 24B3, and a bobbin 28 is molded integrally with a yoke 22 by insert molding. Since each protrusion 26A1, 26B1, 26A2, 26B2 bears each pole tooth 23B2, 23A2, 24B2, 24A2(the tip thereof) from the outside, the synthetic resin can be prevented from flowing between each pole tooth 23A2, 23B2, 24A2, 24B2 and a horizontal direction positioning device 5 by the injection molding pressure during insert molding.
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Inventors:
NAKAJIMA KOICHI
ARAKAWA HARUHIKO
ARAKAWA HARUHIKO
Application Number:
JP2013080130A
Publication Date:
October 27, 2014
Filing Date:
April 08, 2013
Export Citation:
Assignee:
TONEX KK
International Classes:
H02K37/14
Attorney, Agent or Firm:
Etsuo Inamura