TIMEPIECE MOVEMENT AND TIMEPIECE
FIG1 is a block diagram illustrating a configuration example of a timepiece according to a first embodiment
FIG1 is a block diagram illustrating a configuration example of a timepiece 1 according to a first embodiment. As illustrated in FIG1, the timepiece 1 includes a battery 2, an oscillator circuit 3, a frequency divider circuit 4, a storage unit 5, a control unit 10, a first motor 20a, a second motor 20b, a third motor 20c, a train wheel 30a, a train wheel 30b, a train wheel 30c, a first indicating hand 40a, a second indicating hand 40b, and a third indicating hand 40c. The timepiece 1 illustrated in FIG1 is an analog timepiece which displays a measured time by using the indicating hand 40. In the example illustrated in FIG1, the timepiece 1 includes three indicating hands 40. However, the number of the indicating hands 40 may be one, two, four, or more. In this case, for each of the indicating hands 40, the timepiece 1 includes the indicating hand drive unit 121, the motor load detection unit 122, the motor 20, and the train wheel 30.
block diagram
12
indicating hand drive unit
10
control unit
1
timepiece
['1. A timepiece movement (1) comprising: a stepping motor (20) that has a rotor (202) for rotating an indicating hand (40); a control unit (10) to rotate the rotor by using a main drive pulse (P1) and an auxiliary drive pulse (P2), and to determine a reference position of the indicating hand by detecting a rotation state of the rotor when the indicating hand is rotated by using a detection drive pulse based on the main drive pulse; a train wheel (30) to transmit a drive force of the stepping motor to the indicating hand, and that has a first gear (33) and a second gear (32) which mesh with each other; and an elastic portion (56) that is disposed in the first gear, and that is elastically deformed by coming into contact with the second gear when the indicating hand is located at the reference position, wherein the first gear includes an elastic tooth (52) which is a tooth belonging to the first gear, and which has a first tooth surface (53) facing an upstream side in a first rotation direction of the first gear and a second tooth surface (54) facing a downstream side in the first rotation direction, wherein one of the first tooth surface and the second tooth surface is formed from the elastic portion, and characterized in that  the other one of the first tooth surface and the second tooth surface is formed from a rigid body.']