JPS5587077A - Detector for electronic watch - Google Patents
Detector for electronic watchInfo
- Publication number
- JPS5587077A JPS5587077A JP16217178A JP16217178A JPS5587077A JP S5587077 A JPS5587077 A JP S5587077A JP 16217178 A JP16217178 A JP 16217178A JP 16217178 A JP16217178 A JP 16217178A JP S5587077 A JPS5587077 A JP S5587077A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- external magnetic
- step motor
- detection
- immediately
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To increase the anti-magnetism of step motor of electronic watch without providing shield, by applying drive pulse to the step motor immediately after the detection of external magnetic field. CONSTITUTION:The external magnetic field is detected with the induced magnetic field of rotor rotation detection for the step motor and if no external magnetic field is detected, the drive pulse PD1 via the OR circuit 14 of the control section is fed to the step motor via the terminal 146 immediately after the detection of external magnetic field. When the external magnetic field is detected, RS type FF150 is set with the external magnetic field detection signal inputted from the terminal 141, the opening of the AND.OR gate 155 is controlled, the forced drive pulse PD2 is fed to the step motor via the terminal 146 immediately after the detection of external magnetic field and the step motor is driven without malfunction and without mis- judgement of rotation. Accordingly, no external magnetic field shield is required and the watch can be made small in size.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16217178A JPS5587077A (en) | 1978-12-25 | 1978-12-25 | Detector for electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16217178A JPS5587077A (en) | 1978-12-25 | 1978-12-25 | Detector for electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5587077A true JPS5587077A (en) | 1980-07-01 |
Family
ID=15749362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16217178A Pending JPS5587077A (en) | 1978-12-25 | 1978-12-25 | Detector for electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5587077A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5587976A (en) * | 1978-12-26 | 1980-07-03 | Seiko Instr & Electronics Ltd | Device for detecting electronic watch |
JPS5587977A (en) * | 1978-12-26 | 1980-07-03 | Seiko Instr & Electronics Ltd | Device for detecting electronic watch |
JPS6052328A (en) * | 1983-09-01 | 1985-03-25 | Maruyama Kogyo Kk | Thermal adhesion of sheet |
-
1978
- 1978-12-25 JP JP16217178A patent/JPS5587077A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5587976A (en) * | 1978-12-26 | 1980-07-03 | Seiko Instr & Electronics Ltd | Device for detecting electronic watch |
JPS5587977A (en) * | 1978-12-26 | 1980-07-03 | Seiko Instr & Electronics Ltd | Device for detecting electronic watch |
JPS6262307B2 (en) * | 1978-12-26 | 1987-12-25 | Seiko Denshi Kogyo Kk | |
JPS6052328A (en) * | 1983-09-01 | 1985-03-25 | Maruyama Kogyo Kk | Thermal adhesion of sheet |
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