US 12,443,143 B2
Train wheel holding structure and timepiece
Shoichiro Morita, Saitama (JP); and Daisuke Yamada, Tokyo (JP)
Assigned to CITIZEN WATCH CO., LTD., Tokyo (JP)
Appl. No. 18/021,321
Filed by CITIZEN WATCH CO., LTD., Tokyo (JP)
PCT Filed Jul. 13, 2021, PCT No. PCT/JP2021/026284
§ 371(c)(1), (2) Date Feb. 14, 2023,
PCT Pub. No. WO2022/044584, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 2020-146253 (JP), filed on Aug. 31, 2020.
Prior Publication US 2023/0297029 A1, Sep. 21, 2023
Int. Cl. G04B 19/02 (2006.01); G04B 13/02 (2006.01); G04B 19/04 (2006.01)
CPC G04B 19/02 (2013.01) [G04B 13/02 (2013.01); G04B 19/044 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A train wheel holding structure comprising:
a first support member;
a second support member;
a pointer hand wheel including a pointer hand and a shaft, the pointer hand wheel being supported by the first support member and the second support member; and
a train wheel driving the pointer hand wheel, wherein
the first support member includes two or more shaft holes corresponding to different two or more positions to support the shaft of the pointer hand wheel, and
the second support member includes a support hole corresponding to each of the two or more shaft holes, a bush supporting the shaft of the pointer hand wheel without looseness is provided in the support hole corresponding to the shaft hole by which the pointer hand wheel is supported, and the bush is not provided in the support hole corresponding to the shaft hole by which the pointer hand wheel is not supported.