Title:
ELECTROMAGNETIC BRAKING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/225126
Kind Code:
A1
Abstract:
This electromagnetic braking device comprises: an armature rotatably supported around an axis of a rotary shaft; a recessed groove formed in an annular shape with the rotary shaft as a center; a yoke that has a substantially cylindrical inner cylinder part formed radially inside the recessed groove and a substantially cylindrical outer cylinder part formed radially outside the recessed groove; and a coil that is provided inside the recessed groove and generates, when being electrified, a magnetic force to draw the armature toward the yoke, wherein a first facing surface of the armature, which faces the yoke, has a sliding surface that slides with the outer cylinder part of the yoke and a recessed part provided radially inside the sliding surface and recessed in a direction away from the yoke, and the inner peripheral edge part of a second facing surface facing the armature on the outer cylinder part and a third facing surface facing the armature on the inner cylinder part are provided to face the recessed part and are in a state of non-contact with the first facing surface.
Inventors:
KOIKE ASUKA (JP)
FURUKI SHIGERU (JP)
FURUKI SHIGERU (JP)
Application Number:
PCT/JP2021/017297
Publication Date:
November 11, 2021
Filing Date:
April 30, 2021
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
G05G5/03; F16D55/28
Foreign References:
| JPH08284979A | 1996-11-01 | |||
| JP2005262803A | 2005-09-29 | |||
| JPH07138712A | 1995-05-30 | |||
| JPS61192934A | 1986-08-27 | |||
| JP2015132356A | 2015-07-23 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Download PDF:
Previous Patent: SEMICONDUCTOR DEVICE
Next Patent: POSITIVE PHOTOSENSITIVE RESIN COMPOSITION, DRY FILM, PATTERNED COATING FILM AND ELECTRONIC COMPONENT
Next Patent: POSITIVE PHOTOSENSITIVE RESIN COMPOSITION, DRY FILM, PATTERNED COATING FILM AND ELECTRONIC COMPONENT