US 12,085,896 B2
Pointer device and timepiece
Kyohei Hasebe, Tachikawa (JP); Takashi Suizu, Fussa (JP); Koji Namiki, Higashimurayama (JP); and Makoto Sawada, Nishitokyo (JP)
Assigned to Casio Computer Co., Ltd., Tokyo (JP)
Filed by Casio Computer Co., Ltd., Tokyo (JP)
Filed on Sep. 15, 2021, as Appl. No. 17/476,253.
Claims priority of application No. 2020-156285 (JP), filed on Sep. 17, 2020.
Prior Publication US 2022/0083008 A1, Mar. 17, 2022
Int. Cl. G04B 27/00 (2006.01); G04B 1/10 (2006.01); G04B 13/02 (2006.01)
CPC G04B 27/00 (2013.01) [G04B 1/10 (2013.01); G04B 13/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A pointer device comprising:
a rotation body;
a pointer shaft provided on the rotation body;
a base member which rotatably supports the pointer shaft, and
a spiral spring which has a truncated conical shape and is arranged between the rotation body and the base member,
wherein a large diameter portion of the spiral spring is positioned on a surface of either of the rotation body and the base member, and a small diameter portion of the spiral spring is arranged on a surface of the other of the rotation body and the base member,
wherein the spiral spring is formed in the truncated conical shape by a wire being wound in a spiral shape and the small diameter portion being raised higher than the large diameter portion in an expansion/contraction direction, and
wherein a portion of the wire corresponding to an outer circumferential portion of the large diameter portion of the spiral spring is bent toward the base member, and an end of the bent portion of the wire is positioned on the base member together with an end of the wire corresponding to an inner circumferential portion of the small diameter portion.