Movement construction for electronic timepiece
AssigneeCitizen Watch Co., Ltd.
InventorsKazunari Kume, Minoru Watanabe, Hideshi Ohno, Munetaka Tamaru
Life of this patent
Estimating the term…
Abstract
A movement structure for an electronic timepiece, in which a wheel train of a time indicating mechanism is supported between a wheel train bridge and a base plate. The base plate carries thereon a stepping motor connected to the time indicating mechanism, and the wheel train bridge carries thereon an integrated circuit chip.
Claims15
A movement structure for an electronic timepiece having a stepping motor and time indicating hands driven by said stepping motor, comprising:
- a time dial;
- a wheel train bridge disposed in spaced relationship with respect to said time dial;
- a base plate spaced from said wheel train bridge;
- a rotor forming part of said stepping motor and rotatably supported between said wheel train bridge and said base plate, said rotor having a rotor pinion;
- a first reduction gear rotatably supported between said wheel train bridge and said base plate, said first reduction gear meshing said rotor pinion of said rotor and having a pinion;
- a second reduction gear disposed between said wheel train bridge and said base plate and meshing said pinion of said first reduction gear, said second reduction gear being mounted on a shaft having its lower end provided with a reduction gear pinion directly and rotatably supported by said wheel train bridge;
- a center wheel disposed between said wheel train bridge and said time dial and meshing said reduction gear pinion of said second reduction gear, said center wheel driving said indicating hands.
A movement structure for an electronic timepiece having a stepping motor and time indicating hands driven by said stepping motor, comprising:
- a time dial;
- a wheel train bridge disposed in spaced relationship with respect to said time dial;
- a base plate spaced from said wheel train bridge;
- a rotor forming part of said stepping motor and rotatably supported between said wheel train bridge and said base plate, said rotor having a rotor pinion;
- a first reduction gear rotatably supported between said wheel train bridge and said base plate, said first reduction gear meshing said rotor pinion of said first rotor and having a first pinion;
- a second reduction gear rotatably supported between said wheel train bridge and said base plate, said second reduction gear meshing said first pinion of said first reduction gear and having a second pinion;
- a fourth wheel rotatably supported between said wheel train bridge and said base plate, said fourth wheel meshing said second pinion of said second reduction gear and having a third pinion;
- a third wheel disposed between said wheel train bridge and said base plate and meshing said third pinion of said fourth wheel, said third wheel including a shaft having its upper end rotatably supported by said base plate, an intermediate portion provided with a boss portion having its lower portion directly and rotatably supported by said wheel train bridge, and a lower end provided with a pinion;
- a center wheel disposed between said wheel train bridge and said time dial and meshing said pinion of said third wheel, said center wheel driving said indicating hands.
Dependencies are inferred from the claim text.