JPS5447644A - Warning display device of cameras - Google Patents

Warning display device of cameras

Info

Publication number
JPS5447644A
JPS5447644A JP11432977A JP11432977A JPS5447644A JP S5447644 A JPS5447644 A JP S5447644A JP 11432977 A JP11432977 A JP 11432977A JP 11432977 A JP11432977 A JP 11432977A JP S5447644 A JPS5447644 A JP S5447644A
Authority
JP
Japan
Prior art keywords
cap
lens
pushed
switch
shutter button
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
JP11432977A
Other languages
Japanese (ja)
Inventor
Tetsuya Taguchi
Kazuo Igawa
Michiro Hirohata
Hideo Tamamura
Mutsuhide Matsuda
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP11432977A priority Critical patent/JPS5447644A/en
Publication of JPS5447644A publication Critical patent/JPS5447644A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Control For Cameras (AREA)
  • Indication In Cameras, And Counting Of Exposures (AREA)

Abstract

PURPOSE: To let a lamp flicker and warm that photographing is infeasible when shutter button is pushed where the camera is kept mounted with a lens cap by providing a switch which opens and closes by detecting the presence or not of the cap to lens-barrel part.
CONSTITUTION: When a lens cap is fitted to the end part of the lens barrel, a button 9 is pushed by the inside circumferential surface of the cap and presses contact pieces 12a, 12b, thus holding a switch 12 closed. When the shutter button is pushed at the time of flash photographing with the lens cap being held put on, a data lighting lamp 40 goes on and displays data in the finder. When at this time the switch 32 cooperating to the first step of pushing-down of the shutter button closes, the minus side of an astable multivibrator circuit E is connected to batteries 13, 11 via switches 12, 32, 33 and a transistor 50 repeats ON and OFF. This causes a transistor 34 also to go ON and OFF to flicker the lamp 40 in the finder, this giving warning
COPYRIGHT: (C)1979,JPO&Japio
JP11432977A 1977-09-21 1977-09-21 Warning display device of cameras Pending JPS5447644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11432977A JPS5447644A (en) 1977-09-21 1977-09-21 Warning display device of cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11432977A JPS5447644A (en) 1977-09-21 1977-09-21 Warning display device of cameras

Publications (1)

Publication Number Publication Date
JPS5447644A true JPS5447644A (en) 1979-04-14

Family

ID=14635084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11432977A Pending JPS5447644A (en) 1977-09-21 1977-09-21 Warning display device of cameras

Country Status (1)

Country Link
JP (1) JPS5447644A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457604A (en) * 1981-02-27 1984-07-03 Canon Kabushiki Kaisha Camera having lens protection cover
JPS60211442A (en) * 1984-04-05 1985-10-23 Matsushita Electric Ind Co Ltd Video camera
US4595268A (en) * 1981-02-27 1986-06-17 Canon Kabushiki Kaisha Camera having lens protection cover
US5581315A (en) * 1994-10-20 1996-12-03 Fuji Photo Optical Co., Ltd. Camera with built-in photoflash unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457604A (en) * 1981-02-27 1984-07-03 Canon Kabushiki Kaisha Camera having lens protection cover
US4595268A (en) * 1981-02-27 1986-06-17 Canon Kabushiki Kaisha Camera having lens protection cover
JPS60211442A (en) * 1984-04-05 1985-10-23 Matsushita Electric Ind Co Ltd Video camera
US5581315A (en) * 1994-10-20 1996-12-03 Fuji Photo Optical Co., Ltd. Camera with built-in photoflash unit

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