Hand-moving mechanism and timepiece
US9804572B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2017 |
| Grant date | Oct 31, 2017 |
| Priority date | — |
| Expiry date | Mar 1, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.