Warning display device of cameras

Abstract

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

Inventors

• 👤 Tetsuya Taguchi
• 👤 Kazuo Igawa
• 👤 Michiro Hirohata
• 👤 Hideo Tamamura
• 👤 Mutsuhide Matsuda

Bibliographic Details