Electronic wristwatch with generator
First Claim
1. An electronic wristwatch having an electric generator therein, the generator converting mechanical energy to electrical energy for driving the electronic wristwatch comprising mechanical energy means for producing mechanical energy;
- power transmission means for transmitting said mechanical energy to said generator by applying a torque to said generator; and
limiting means for preventing mechanical energy transmission through said power transmission means when the torque to be applied to said generator exceeds a predetermined value and allowing said mechanical energy transmission through said power transmission means when said torque to be applied to said generator is less than or equal to the predetermined value.
1 Assignment
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Accused Products
Abstract
An electronic wristwatch having an electric generator contained internally therein is provided. The generator converts energy from mechanical to electrical energy to drive the electronic wristwatch. The oscillation of an oscillating weight produces mechanical energy as it oscillates. A wheel train transmits the mechanical energy to the generator by applying a torque to the generator. A limiter prevents transmission of mechanical energy through the wristwatch when the torque to be applied to the generator exceeds a predetermined value and allows the mechanical energy to be transmitted when the torque to be applied to the generator is less than or equal to the predetermined value.
38 Citations
23 Claims
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1. An electronic wristwatch having an electric generator therein, the generator converting mechanical energy to electrical energy for driving the electronic wristwatch comprising mechanical energy means for producing mechanical energy;
- power transmission means for transmitting said mechanical energy to said generator by applying a torque to said generator; and
limiting means for preventing mechanical energy transmission through said power transmission means when the torque to be applied to said generator exceeds a predetermined value and allowing said mechanical energy transmission through said power transmission means when said torque to be applied to said generator is less than or equal to the predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
- power transmission means for transmitting said mechanical energy to said generator by applying a torque to said generator; and
- 13. An electronic wristwatch having an electric generator therein, the generator converting mechanical energy to electric energy for driving the electronic wristwatch comprising an oscillating weight for producing mechanical energy, a wheel train for transmitting said mechanical energy to said generator by applying a torque to said generator, the wheel train including a transmission wheel having a transmission pinion and a transmission gear wheel, the transmission pinion being affixed to said transmission gear wheel by a friction fit for preventing mechanical energy transmission through said wristwatch when the torque to be applied to said generator exceeds a predetermined value and allowing said mechanical energy transmission when said torque to be applied to said generator is less than or equal to the predetermined value.
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16. An electronic wristwatch having an electric generator therein, the generator converting mechanical energy to electrical energy for driving the electronic wristwatch comprising an oscillating weight for producing mechanical energy;
- a wheel train for transmitting mechanical energy from said oscillating weight to said generator;
said generator including a permanent magnet rotor driven by said wheel train, a substantially planar plate type stator having an opening formed therein, said rotor being positioned in said opening, a coil magnetically connected to said stator for generating an induced voltage in response to rotation of said rotor, said wheel train and said coil being disposed so as not to overlap in plan view, said oscillating weight being pivotably supported at the center of said wristwatch and having an outer peripheral portion disposed coplanar with said coil and outside of said coil relative to the center of said wristwatch. - View Dependent Claims (17, 18)
- a wheel train for transmitting mechanical energy from said oscillating weight to said generator;
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19. An electronic wristwatch having an electric generator therein, the generator converting mechanical energy to electrical energy for driving said electronic wristwatch comprising a main plate;
- an oscillating weight for producing mechanical energy pivotably mounted on one side of the main plate;
an indicating wheel train for controlling the display of said wristwatch, a step motor including a rotor, a stator and a coil for driving said indicating wheel train;
a transmission wheel train for transmitting said mechanical energy to said generator by applying a torque to said generator;
said generator including a permanent magnet rotor rotated by said transmission wheel train and a generator coil magnetically coupled to said permanent magnet rotor to generate an induced voltage in response to rotation of said rotor; and
a circuit board arranged to output a signal for driving said step motor and control the output from said generator coil, said indicating wheel train, said transmission wheel train, said coil, said generator coil and said circuit board being disposed within said wristwatch in a dispersed pattern so that these elements do not substantially overlap each other in plan view and said oscillating weight being pivotably disposed on the obverse side of said main plate. - View Dependent Claims (20, 21, 22, 23)
- an oscillating weight for producing mechanical energy pivotably mounted on one side of the main plate;
Specification