Title:
ELECTRONIC WRIST WATCH EQUIPPED WITH POWER GENERATOR
Document Type and Number:
WIPO Patent Application WO/1989/006833
Kind Code:
A1
Abstract:
The rotational force of a rotary weight is transmitted to a permanent magnet rotor via a train wheel to turn the rotor at an increased speed. A capacitor which functions as a charging means is charged with induced voltage generated in the coil, which voltage serves as the power source for driving the timepiece circuit. A frictionally coupled part is provided somewhere from the rotary weight to the rotor; therefore, when a torque greater than a predetermined value is applied to the power transmission part, the frictionally coupled part undergoes slipping to prevent the parts from breaking. Further, a thick part of the rotary weight is arranged outside the coil nearly flush with the coil. Therefore, the timepiece does not become thick and enhances the torque efficiency. Moreover, the train wheel in the power transmission part is not superposed on the train wheel of the timepiece but is arranged by dispersion to realize a thin electronic wrist watch equipped with power generator.
Inventors:
NAGAO SHOICHI (JP)
Application Number:
PCT/JP1988/000052
Publication Date:
July 27, 1989
Filing Date:
January 25, 1988
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
International Classes:
G04B5/14; G04B13/02; G04C3/14; G04C10/00; G04G19/00; G04G99/00; H02J7/32; H02K1/27; H02K5/04; H02K7/10; H02K21/18; (IPC1-7): G04C10/00; H02K7/18
Foreign References:
| JPS5282480A | 1977-07-09 | |||
| JPS462677Y1 | 1971-01-29 | |||
| JPS387848B1 | ||||
| JPS429273Y1 | ||||
| JPS6269190A | 1987-03-30 | |||
| JPS6269191A | 1987-03-30 | |||
| JPS6254196A | 1987-03-09 |
Download PDF:
Previous Patent: TRACK SYSTEM FOR MOVING PROCESSOR IN AND OUT OF CABINET
Next Patent: ELECTRONIC WRIST WATCH WITH POWER GENERATOR
Next Patent: ELECTRONIC WRIST WATCH WITH POWER GENERATOR