Watch movement construction
AssigneeCitizen Watch Co., Ltd.
InventorYasuaki Nakayama
Life of this patent
Estimating the term…
Abstract
A watch movement construction has a time dial and a base plate having its one surface fixedly supporting the time dial and including a central region and first and second marginal regions. A wheel train mechanism is disposed in the central region of said base plate substantially in the same plane as the base plate. An electro-mechanical transducer is disposed in the first marginal region of the base plate substantially in the same plane as the wheel train mechanism. An electronic circuit section includes a circuit substrate and a plurality of electronic components disposed in the second marginal region of the base plate substantially in the same plane as the wheel train mechanism and the electro-mechanical transducer.
Claims74
A movement construction for an electronic timepiece powered by a battery and having an electronic circuit section arranged to provide drive signals indicative of time information, and an electro-mechanical transducer responsive to said drive signals to actuate time-indicating hands adjacent a time dial to display said time information, comprising:
- a base plate having its one side fixedly supporting said time dial and having a thickness substantially equal to a thickness of said movement construction, said base plate including a central region and first and second marginal regions;
- a wheel train mechanism disposed in said central region of said base plate substantially within the thickness of said base plate, said wheel train mechanism being driven by said electro-mechanical transducer for actuating said time-indicating hands;
- said electro-mechanical transducer being disposed in said first marginal region of said base plate substantially within the thickness of said base plate;
- and
- said electronic circuit section including a circuit substrate and a plurality of electronic components disposed in said second marginal region of said base plate substantially within the thickness of said base plate.
A movement construction for an electronic timepiece driven by a stepping motor powered by a battery and including a time dial having a central bore formed therein, comprising:
- a base plate having a cutout formed in close proximity to one portion of an outer periphery of said base plate to accommodate therein said battery, and a recess formed in close proximity to another portion of the outer periphery of said base plate;
- a wheel train bridge and a stator retaining plate mounted on one side of said base plate in the same plane;
- a wheel train mechanism disposed in a space between said base plate and said wheel train bridge in a central region of said base plate, said wheel train mechanism including a central shaft implanted in said base plate at a central region thereof, a center wheel and pinion and an hour wheel rotatably supported by said central shaft, said central shaft extending through the central bore of said time dial;
- and
- a cylindrical, elongated driving coil forming part of said stepping motor and disposed in said recess of said base plate;
- said base plate having a thickness substantially equal to a thickness of said movement construction.
A movement construction for an electronic timepiece driven by a stepping motor powered by a battery and including a time dial having a central bore formed therein, comprising:
- a base plate having a cutout formed in close proximity to one portion of an outer periphery of said base plate to accommodate therein said battery, and a recess formed in close proximity to another portion of the outer periphery of said base plate, said base plate having a thickness substantially equal to a thickness of said movement construction;
- a wheel train bridge and a stator retaining plate mounted on one side of said base plate in the same plane;
- a wheel train mechanism disposed in a space between said base plate and said wheel train bridge in a central region of said base plate within the thickness of said base plate, said wheel train mechanism including a central shaft implanted in said base plate at a central region thereof, a center wheel and pinion and an hour wheel rotatably supported by said central shaft, said central shaft extending through the central bore of said time dial;
- and
- a cylindrical, elongated driving coil forming part of said stepping motor and disposed in said recess of said base plate within the thickness of said base plate.
A movement construction for an electronic timepiece powered by a battery and having an electronic circuit section arranged to provide drive signals indicative of time information, and an electro-mechanical transducer responsive to said drive signals to actuate time-indicating hands adjacent a time dial to display said time information, comprising:
- a base plate having its one side fixedly supporting said time dial and having a thickness substantially equal to a thickness of said movement construction, said base plate including a central region and first and second marginal regions;
- a wheel train mechanism disposed in said central region of said base plate substantially in the same plane as said base plate within the thickness of said base plate, said wheel train mechanism being driven by said electro-mechanical transducer for actuating said time-indicating hands;
- said electro-mechanical transducer being disposed in said first marginal region of said base plate substantially in the same plane as said wheel train mechanism within the thickness of said base plate;
- and
- said electronic circuit section including a circuit substrate and a plurality of electronic components disposed in said second marginal region of said base plate substantially in the same plane as said wheel train mechanism and said electro-mechanical transducer within the thickness of said base plate.
Dependencies are inferred from the claim text.