JPS55106423A - Power source switch of distance measuring circuit - Google Patents

Power source switch of distance measuring circuit

Info

Publication number
JPS55106423A
JPS55106423A JP1400779A JP1400779A JPS55106423A JP S55106423 A JPS55106423 A JP S55106423A JP 1400779 A JP1400779 A JP 1400779A JP 1400779 A JP1400779 A JP 1400779A JP S55106423 A JPS55106423 A JP S55106423A
Authority
JP
Japan
Prior art keywords
power source
measuring circuit
distance measuring
turning
distance
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.)
Granted
Application number
JP1400779A
Other languages
Japanese (ja)
Other versions
JPS6217209B2 (en
Inventor
Masamichi Furukawa
Akira Takahashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP1400779A priority Critical patent/JPS55106423A/en
Publication of JPS55106423A publication Critical patent/JPS55106423A/en
Publication of JPS6217209B2 publication Critical patent/JPS6217209B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To open power source surely from a distance measuring circuit and eliminate wasteful power consumption of batteries when the camera is not used by so constituting the switch that the power source is switched on to the distance measuring circuit by detecting the turning of the distance ring of the camera.
CONSTITUTION: A focusing ring 1 is extended from or returned into the camera body A and is operated by turning of a distance ring 2. This operation causes the focusing detection signal X to be sent to the visual display lamp 31 of a distance measuring circuit 3. When focusing is displayed, the turning of the distance ring 2 is stopped. This distance measuring circuit 3 is connected to the power source E via switching circuit 4 and the input end 41 of this switching circuit 4 is connected to a turning detection means 5 which outputs the turning detection signal I. By this constitution, the power source connection may be readily accomplished along with truning of the distance ring, the operation characteristic of the camera improved and the life of batteries prolonged.
COPYRIGHT: (C)1980,JPO&Japio
JP1400779A 1979-02-09 1979-02-09 Power source switch of distance measuring circuit Granted JPS55106423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1400779A JPS55106423A (en) 1979-02-09 1979-02-09 Power source switch of distance measuring circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1400779A JPS55106423A (en) 1979-02-09 1979-02-09 Power source switch of distance measuring circuit

Publications (2)

Publication Number Publication Date
JPS55106423A true JPS55106423A (en) 1980-08-15
JPS6217209B2 JPS6217209B2 (en) 1987-04-16

Family

ID=11849145

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1400779A Granted JPS55106423A (en) 1979-02-09 1979-02-09 Power source switch of distance measuring circuit

Country Status (1)

Country Link
JP (1) JPS55106423A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159137A (en) * 1983-02-28 1984-09-08 Olympus Optical Co Ltd Automatic focusing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110036A (en) * 1976-03-12 1977-09-14 Canon Inc Electric source switch for detection circuit for focusing state
JPS5312599U (en) * 1976-07-14 1978-02-02
JPS53127940U (en) * 1977-03-18 1978-10-11

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52110036A (en) * 1976-03-12 1977-09-14 Canon Inc Electric source switch for detection circuit for focusing state
JPS5312599U (en) * 1976-07-14 1978-02-02
JPS53127940U (en) * 1977-03-18 1978-10-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59159137A (en) * 1983-02-28 1984-09-08 Olympus Optical Co Ltd Automatic focusing device

Also Published As

Publication number Publication date
JPS6217209B2 (en) 1987-04-16

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