US 12,228,466 B2
Annular body, wave reducer, robot, and torque detection device
Daisuke Takagi, Nagaokakyo (JP)
Assigned to Nidec-Shimpo Corporation, Kyoto (JP)
Filed by Nidec-Shimpo Corporation, Nagaokakyo (JP)
Filed on Sep. 2, 2022, as Appl. No. 17/901,892.
Claims priority of application No. 2021-144958 (JP), filed on Sep. 6, 2021.
Prior Publication US 2023/0071143 A1, Mar. 9, 2023
Int. Cl. G01L 3/10 (2006.01); B25J 9/10 (2006.01); B25J 13/08 (2006.01); G01L 5/22 (2006.01)
CPC G01L 3/108 (2013.01) [B25J 9/1025 (2013.01); B25J 13/085 (2013.01); G01L 5/226 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An annular body comprising:
a base portion surrounding a central axis and expanding in a direction intersecting the central axis; and
a resistance wire located in the base portion; wherein
the resistance wire includes:
a first resistance wire portion; and
a second resistance wire portion located radially outside the first resistance wire portion;
the first resistance wire portion includes:
an inner first resistance wire portion; and
an outer first resistance wire portion located radially outside the inner first resistance wire portion;
the second resistance wire portion includes:
an inner second resistance wire portion; and
an outer second resistance wire portion located radially outside the inner second resistance wire portion;
each of the inner first resistance wire portion and the outer first resistance wire portion includes first regions arranged at intervals in a circumferential direction;
each of the first regions includes a region in which a first portion extending in both a radial direction and the circumferential direction is provided in the circumferential direction;
each of the inner second resistance wire portion and the outer second resistance wire portion includes second regions arranged along the circumferential direction; and
each of the second regions includes a region in which a second portion extending in both the radial direction and the circumferential direction is provided in the circumferential direction.