A stator includes a magnetic body having a through-hole, a magnetoresistive portion disposed around the through-hole to generate a magnetic pole around the through-hole in a case where a coil is excited, and a non-magnetic portion disposed at a position different from a position of the magnetoresistive portion around the through-hole by means of thermal melting, and formed to have lower magnetic permeability than the magnetic body.

Provided is an electronic timepiece capable of suppressing variation in the drive speed of a rotor, and driving a motor at a constant speed. The electronic timepiece has a driver; a controller that controls the driver to the on state or the off state according to a current flowing through a coil of a motor; a detection signal output device configured to output a detection signal when the on time or the off time, which are the continuous time of the on state and off state of the driver, meets a specific condition; a reference signal output device that outputs a reference signal used as a reference of a drive speed of the motor; and a drive cycle adjuster that compares the output timing of the detection signal and the reference signal, shortens the drive cycle when the detection signal is output after the reference signal, and when the detection signal is output before the reference signal, lengthens the drive cycle of the motor.

A timepiece movement capable of suppressing generation of malfunction of a hand is provided. The movement includes an indicator hand wheel which is provided so as to be rotatable and to which an indicator hand is mounted; an indicator hand stepping motor rotating and driving the indicator hand wheel in both directions; an hour wheel provided so as to be rotatable around a first rotation axis different from a rotation axis of the indicator hand wheel and having a first shaft portion which extends along the first rotation axis and on the outer peripheral surface of which there is provided a contact portion that the indicator hand can abut, with the distance of the contact portion from the first rotation axis varying in accordance with a position in the peripheral direction around the first rotation axis; and an hour hand stepping motor rotating and driving the hour wheel and provided separately from the indicator hand stepping motor.

A stepping motor includes: a rotor; and a stator including an opening accommodating the rotor, a first side yoke extending from the opening in a first direction, a second side yoke extending from the opening in a second direction that is a direction opposite to the first direction, and one or a plurality of coils magnetically coupled to the first side yoke or the second side yoke. Assuming a direction orthogonal to the first direction and the second direction is defined as a third direction, a first recess is formed in an outer circumference of the stator at a position rotated from the third direction toward the second direction by a prescribed first angle and a second recess that determines a stable resting position of the rotor is formed at a position rotated from the second direction toward the third direction by a prescribed second angle.

Provided is a movement enabling easily providing an indicator position detection mechanism in a movement enabling changing the locations of an indicator by changing the configuration of a wheel train. The movement includes an indicator wheel to which an indicator is attached; a motor that drives the indicator wheel; a detection wheel train used to detect a position of the indicator; and a main plate to which the indicator wheel, the motor, and the detection wheel train are disposed. The main plate is configured to enable selectively disposing the indicator wheel to a first position or a second position that is different from the first position. The detection wheel train is disposed to the same position whether the indicator wheel is disposed to the first position or the second position.

An oscillating circuit includes an input terminal and an output terminal, to both of which an oscillator is coupled, a DC cut capacitor having one terminal of two terminals that is coupled to the input terminal, an inverter having an input side coupled to the other terminal of the DC cut capacitor and an output side coupled to the output terminal, a first feedback resistor coupled in parallel to the inverter, a second feedback resistor coupled in parallel to the DC cut capacitor and the inverter, and a switch coupled in parallel to the DC cut capacitor.

Provided is a motor drive circuit capable of driving a stepper motor even if the load on the stepper motor varies. A motor drive circuit has a first drive circuit that outputs a first drive signal to the driver; a second drive circuit that outputs a second drive signal to the driver; a controller that controls the first drive circuit and second drive circuit. The first drive circuit is configured to output a first drive signal based on the current value of current flow of a coil of a stepper motor. The second drive circuit is configured to output multiple types of second drive signals that differ by the supply time of drive current supplied to the coil. Based on a result of driving by the first drive circuit, the controller selects the type of second drive signal the second drive circuit outputs.

A timepiece includes a voltage detection unit that detects a voltage applied to a stepping motor for driving an indicating hand, and that outputs a voltage detection result, and a drive control unit that controls a rotor to perform reverse rotation by using a reverse rotation pulse including a first pulse whose polarity is the same as that of a normal rotation pulse for causing the rotor of the stepping motor to perform normal rotation, a second pulse whose polarity is reverse to that of the first pulse, and a third pulse whose polarity is reverse to that of the second pulse, and to control the rotor to perform the reverse rotation by using the third pulse having a pulse width set in accordance with the voltage detection result.

A motor driving apparatus is a pulse generation circuit applying a drive pulse for rotating a rotor to a two stepping motor including the rotor magnetized in two poles and a stator in which a two-phase coil is wound around a yoke. The drive pulse is constituted of a drive pulse P1 and a drive pulse P2. The pulse generation circuit applies the drive pulse P1 having a stable stationary position at which a rotor rotation angle from a reference position is 90 degrees or less and applies the drive pulse P2 having a stable stationary position at which the rotor rotation angle from the reference position is 90 degrees or more continuously to the application of the drive pulse P1.

There is provided an analog timepiece including an hour hand, a minute hand, and a second hand which are rotated by a unit step operation of a stepping motor. The analog timepiece includes a rotor that rotates the hour hand, the minute hand, and the second hand, and that has a magnetic polarity, a stator that includes magnetic pole portions disposed around the rotor, coils that excite the magnetic pole portions, and a control unit that controls each unit step of the rotor in accordance with each pulse group by applying a pulse group including a rotary pulse for rotating the rotor and a braking pulse for braking rotation of the rotor, which is applied before the rotary pulse is applied, to the coil.