Automatic film wind-up camera

Claim 1

An automatic film wind-up having a camera body provided with a film wind-up mechanism, a shutter charging mechanism, a shutter front curtain and a shutter back curtain interlocked with the shutter charging mechanism to travel when the shutter is released, a wind-up signalling member which is actuated upon completion of travel of the shutter back curtain, a film frame indexing mechanism, a counter for counting the number of exposed frames and an automatic film wind-up drive motor for driving said film wind-up mechanism and said shutter charging mechanism and capable of attaching removably three types of film backs formed with a means for signalling attachment of the respective films of roll film No. 120, roll film No. 220 and 70 mm film, characterized in that said camera body is provided with a film take-up control member for controlling automatic leading end feed and automatic take-up corresponding to the number of respective exposed frames of said three types of films, a ratchet wheel pivoting integrally with the take-up control member, a first film controlling member interlocked with said take-up control member to control the roll film No. 120, a second film controlling member interlocked with said take-up control member to control the roll film No. 220, a holder member interlocked with said first and second film controlling members to maintain said automatic wind-up drive motor at wind-up condition, a wind-up operative member regulated by the holder member and said film frame indexing mechanism, a wind-up switch interlocked with the wind-up operative member to start and stop said automatic wind-up drive motor, a film start signalling member which is actuated when the wind-up switch is turned on to start the wind-up of film, a reset switch interlocked with the film start signalling member for allowing the exposure counter to count the exposed frames when the reset switch is held in a prescribed state, a feed member interlocked with said film indexing mechahism to move intermittently said take-up control member, first and second stop members interlocked with said feed member to block return of said take-up control member, first, second and third signalling members for detecting the type of film from the film back when any one of said three types of film backs is attached to said camera body and first, second and third releasing members interlocked with the signalling members to release said stop members.