US 11,913,784 B2
Reduction mechanism and absolute encoder
Yasuo Osada, Saitama (JP); Hiroki Negishi, Tokyo (JP); Katsunori Saito, Kanagawa (JP); and Norikazu Sato, Saitama (JP)
Assigned to MINEBEA MITSUMI Inc., Nagano (JP)
Appl. No. 17/593,640
Filed by MINEBEA MITSUMI Inc., Nagano (JP)
PCT Filed Mar. 24, 2020, PCT No. PCT/JP2020/013010
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/203466, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-069043 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0163318 A1, May 26, 2022
Int. Cl. G01B 7/30 (2006.01); G01D 5/14 (2006.01); G01D 5/16 (2006.01)
CPC G01B 7/30 (2013.01) [G01D 5/145 (2013.01); G01D 5/16 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A reduction mechanism used in angle detection of a rotating body, the reduction mechanism comprising:
multiple stages,
wherein a reduction ratio of a reduction mechanism used at a late stage is increased based on a total reduction ratio of the reduction mechanism of the multiple stages, and
wherein the reduction ratio of the reduction mechanism of the late stage is set to a value for reducing a value indicative of an error factor in the angle detection, as compared to a value of a reduction ratio of a reduction mechanism of a first stage or a reduction mechanism of a previous stage of the late stage.