JPS55106423A - Power source switch of distance measuring circuit - Google Patents
Power source switch of distance measuring circuitInfo
- 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
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
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)
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)
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 |
-
1979
- 1979-02-09 JP JP1400779A patent/JPS55106423A/en active Granted
Patent Citations (3)
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)
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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