Patent ID: 6120177
Filing Date: 2000-09-19
Classification: G04B,G04C

Abstract:
An electronic watch, comprising:a base comprising a metallic main plate portion and a circuit support seat portion made of insulating material on which is mounted;a dynamo comprising a dynamo wheel train for transmitting external force to a dynamo rotor;a secondary power supply coupled to the dynamo for storing electric energy generated by said dynamo;a circuit section including a driving circuit coupled to the secondary power supply and constructed to be supplied with power from said secondary power supply;a stepping motor constructed and arranged to be driven by said driving circuit;a watch wheel train constructed and arranged to transmit torque from said stepping motor to a time indicating member;an oscillating weight constructed and arranged to transmit external force to said dynamo rotor through said dynamo wheel train, said oscillating weight comprising:a rotating central portion supported by said base;a thinner wall portion formed around said rotating central portion; anda thicker wall portion formed around said thinner wall portion;said watch wheel train and said dynamo wheel train being arranged on said base in a rotating area of said thinner wall portion; andsaid circuit section positioned such that a portion thereof is positioned at a rotating area of said thicker wall portion and is arranged in a circuit part installation hole formed in said circuit support seat, wherein said circuit section is electrically isolated from said metallic main plate.