Hand-moving mechanism and timepiece
AssigneeCasio Computer Co., Ltd.
InventorsYuta Saito, Junro Yano
Life of this patent
Estimating the term…
Abstract
A hand-moving mechanism configured to move a hand, the hand-moving mechanism including a stepping motor that includes a plurality of coils and that rotates a rotational shaft thereof in forward and reverse directions; a wheel train mechanism that includes a plurality of gears including one gear which is coupled to the rotational shaft of the stepping motor, and another gear which is coupled to the hand; and a motor driving control unit that individually controls energization to each coil to drive the stepping motor. A number of the coils to be simultaneously energized in a display hand-moving operation is different from a number of the coils to be simultaneously energized in a non-display hand-moving operation.
Claims16
A hand-moving mechanism configured to move a hand, the hand-moving mechanism comprising:
- a stepping motor that includes a plurality of coils and that rotates a rotational shaft thereof in forward and reverse directions;
- a wheel train mechanism that includes a plurality of gears comprising (i) a first gear which is coupled to the rotational shaft of the stepping motor, and (ii) a second gear which is coupled to the hand;
- and
- a motor driving control unit that individually controls energization to each coil to drive the stepping motor,
- wherein a number of the coils to be simultaneously energized in a display hand-moving operation is different from a number of the coils to be simultaneously energized in a non-display hand-moving operation,
- wherein each coil is connected to a respective one of coil substrates, each coil substrate including a portion which corresponds to a respective one of notches formed in a circuit substrate, and
- wherein only the portions of the coil substrates which correspond to the notches formed in the circuit substrate are covered with protective resins.
Dependencies are inferred from the claim text.