US 11,982,546 B2
Position detection device
Yuki Suyama, Niigata (JP); and Masataka Tanahashi, Niigata (JP)
Assigned to Nippon Seiki Co., Ltd., Niigata (JP)
Appl. No. 17/435,621
Filed by Nippon Seiki Co., Ltd., Niigata (JP)
PCT Filed Mar. 3, 2020, PCT No. PCT/JP2020/008916
§ 371(c)(1), (2) Date Sep. 1, 2021,
PCT Pub. No. WO2020/184295, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 2019-043295 (JP), filed on Mar. 11, 2019.
Prior Publication US 2022/0155101 A1, May 19, 2022
Int. Cl. G01D 5/14 (2006.01); G01D 5/16 (2006.01)
CPC G01D 5/142 (2013.01) [G01D 5/16 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A position detection device comprising:
a lever member to rotate on a central axis of rotation;
a detected portion to rotate on the central axis of rotation in association with rotation of the lever member; and
a rotation detecting portion to detect rotation of the detected portion,
wherein the lever member includes a thick plate portion, which is located at a section near the central axis of rotation, and a thin plate portion, which is located farther from the central axis of rotation than the thick plate portion and is formed to be thinner than the thick plate portion,
wherein the lever member includes a groove portion, which is located at least either a front face or a back face of the lever member and extends along a longitudinal direction of the lever member, and
wherein a tip portion of the groove portion facing the central axis of rotation includes a pair of oblique faces, which are oblique so that a distance to each other becomes narrower toward a tip side of the groove portion and form an obtuse angle with side faces of the groove portion, and an arc face in an arc shape connecting tip sides of the pair of oblique faces.