Title:
ELECTRIC MOTOR
Document Type and Number:
WIPO Patent Application WO/2022/137890
Kind Code:
A1
Abstract:
An electric motor comprising: a rotor having a rotary shaft and a commutator attached to the rotary shaft; brushes each including a front end portion (first end portion) in contact with the commutator and a back end portion (second end portion) positioned on the opposite side to the first end portion; and constant load springs each of which is formed from a belt-shaped wire material and which is for pressing the brush against the commutator, wherein the constant load spring has a spiral portion formed by winding the belt-shaped wire material, and the spiral portion and the second end portion are in contact with each other at two or more positions.
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Inventors:
YOSHIOKA YUUKI
Application Number:
PCT/JP2021/041995
Publication Date:
June 30, 2022
Filing Date:
November 16, 2021
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H02K13/00
Foreign References:
| JPS5825565U | 1983-02-18 | |||
| JPS50136605A | 1975-10-30 | |||
| JPS60117675U | 1985-08-08 | |||
| JPS61118987A | 1986-06-06 |
Attorney, Agent or Firm:
KAMATA Kenji et al. (JP)
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