Title:
ABSOLUTE ENCODER
Document Type and Number:
WIPO Patent Application WO/2020/203461
Kind Code:
A1
Abstract:
Provided is an absolute encoder suitable for miniaturization. The absolute encoder comprises a worm gear part, a permanent magnet (19) provided on the distal-end side of the worm gear part, and a magnetic sensor. In the permanent magnet (19), a first magnetic pole portion (N) having a first polarity and a second magnetic pole portion (S) having a second polarity different from the first polarity are formed adjacent to each other as viewed from an axial end surface of the permanent magnet (19). The first magnetic pole portion (N) and the second magnetic pole portion (S) are formed adjacent to each other in the radial direction, with the radial center of the permanent magnet (19) as a boundary therebetween, and the first magnetic pole portion (N) and the second magnetic pole portion (S) are formed adjacent to each other in the axial direction, with the axial center of the permanent magnet (19) as a boundary therebetween.
Inventors:
SATO NORIKAZU (JP)
NISHIGUCHI KAORU (JP)
HISHIYAMA HIROYUKI (JP)
ISHI YUJIN (JP)
NISHIGUCHI KAORU (JP)
HISHIYAMA HIROYUKI (JP)
ISHI YUJIN (JP)
Application Number:
PCT/JP2020/012981
Publication Date:
October 08, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
MINEBEA MITSUMI INC (JP)
International Classes:
G01D5/244; G01D5/245
Domestic Patent References:
| WO2019059173A1 | 2019-03-28 |
Foreign References:
| JP2015105900A | 2015-06-08 | |||
| JP2011058870A | 2011-03-24 | |||
| JP2019015536A | 2019-01-31 | |||
| US20140278223A1 | 2014-09-18 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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