Title:
マグネットロータおよびそのマグネットロータを備えた可動磁石式計器、そのマグネットロータを備えたステッピングモータ
Document Type and Number:
Japanese Patent JP4458988
Kind Code:
B2
Abstract:
A magnet rotor in which rotation prevention and positional displacement (rattling, and misalignment of axes) between a magnet and a rotor body can be restricted, a movable magnet type-instrument with the magnet rotor, and a stepping motor with the magnet rotor. In the magnet rotor, projections (11) and recesses (12) arranged with predetermined intervals and formed in a substantially rectangular shape are provided on the inner wall of a hollow section of an annular magnet (10). Rising side wall sections (11A) defined by the projections (11) are radially directed with the position of the axis (G) of the magnet rotor (R) as the standard. In the rotor body (20), rotation prevention sections (21) for preventing relative rotation between the rotor body (20) and the annular magnet (10) are formed by placing a plastic material along the shapes of the projections (11) and the recesses (12).
Inventors:
Takahiro Komagata
Hideki Sato
Toru Hasegawa
Hideki Sato
Toru Hasegawa
Application Number:
JP2004251464A
Publication Date:
April 28, 2010
Filing Date:
August 31, 2004
Export Citation:
Assignee:
Nippon Seiki Co., Ltd.
International Classes:
H02K37/14
Domestic Patent References:
| JP58087476U | ||||
| JP4114738U | ||||
| JP2001339932A | ||||
| JP2123949A | ||||
| JP58086849A | ||||
| JP11008954A | ||||
| JP2001317970A | ||||
| JP2001289876A |