JPS5540912A - Position detector for electronic watch - Google Patents

Position detector for electronic watch

Info

Publication number
JPS5540912A
JPS5540912A JP11339078A JP11339078A JPS5540912A JP S5540912 A JPS5540912 A JP S5540912A JP 11339078 A JP11339078 A JP 11339078A JP 11339078 A JP11339078 A JP 11339078A JP S5540912 A JPS5540912 A JP S5540912A
Authority
JP
Japan
Prior art keywords
reset pulse
pointer
reliability
led
photo
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
Application number
JP11339078A
Other languages
Japanese (ja)
Inventor
Shingo Ichikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP11339078A priority Critical patent/JPS5540912A/en
Publication of JPS5540912A publication Critical patent/JPS5540912A/en
Pending legal-status Critical Current

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  • Electromechanical Clocks (AREA)

Abstract

PURPOSE: To increase the reliability of switch mechanism, by intermittently operating the detector of non-contactness in the timing that not duplicated with the motor drive signal.
CONSTITUTION: When the second pointer 9c is not a correct position, the light path of the photo coupler PC35 is shielded with the index wheel 34, the detection light 43 by LED 36 is not reached to the photo transistor PT37, the detection circuit is not operated, and the reset pulse terminal Rp holds the logical "0" level. When the second pointer 9c is a correct position, the detection light 43 of LED 36 passes through the slit 34a of the wheel 34 and it is detected with PT37. The photo current by it inverts the input of the inverter 41 into "1", the reset pulse generation circuit 30 produces the reset pulse of the logic "1" to the terminal Rp via the inverters 41 and 42, and the pointer display unit and the auxiliary counter are synchronized. Thus, the reliability of the switch mechanism can be increased.
COPYRIGHT: (C)1980,JPO&Japio
JP11339078A 1978-09-14 1978-09-14 Position detector for electronic watch Pending JPS5540912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11339078A JPS5540912A (en) 1978-09-14 1978-09-14 Position detector for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11339078A JPS5540912A (en) 1978-09-14 1978-09-14 Position detector for electronic watch

Publications (1)

Publication Number Publication Date
JPS5540912A true JPS5540912A (en) 1980-03-22

Family

ID=14611089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11339078A Pending JPS5540912A (en) 1978-09-14 1978-09-14 Position detector for electronic watch

Country Status (1)

Country Link
JP (1) JPS5540912A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04109395U (en) * 1991-03-01 1992-09-22 リズム時計工業株式会社 Zero return clock detection mechanism
KR20180071694A (en) 2016-12-20 2018-06-28 삼성전기주식회사 Complex electronic component and board having the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04109395U (en) * 1991-03-01 1992-09-22 リズム時計工業株式会社 Zero return clock detection mechanism
KR20180071694A (en) 2016-12-20 2018-06-28 삼성전기주식회사 Complex electronic component and board having the same

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