Power-driven film winding and shutter release mechanism

Claim 2

In an automatic film transport type camera, the combination comprising: an electromotor having a rotatable shaft; a rotatable take-in shaft for the film; a transmission mechanism for intermittently driving the take-in shaft in response to rotation of the motor shaft so that an unexposed portion of the film is transported to a position where it remains stationary during an exposure operation; the transmission mechanism including a generally cylindrical member geared for rotation with the motor shaft, means for imparting a reciprocating translatory motion to the cylindrical member so that in the course of each revolution it translates toward and then away from a predetermined position, and means operatively engaged with the cylindrical member while it translates toward the predetermined position for rotatably driving the take-in shaft; and means for actuating the exposure operation while the cylindrical member is translating away from the predetermined position.

Claim 3

The combination of claim 1 wherein the actuating means includes releaser means operable for directly actuating the exposure operation, a bellcrank having a first arm engaged with the releaser means so that rotation of the bellcrank about the bellcrank pivot point controls the operation of the releaser means, a second arm of the bellcrank projecting toward the cylindrical member, and means operative during each revolution of the cylindrical member for imparting a cyclical motion to the second arm so that its end sequentially moves from an initial position radially inwardly with respect to the cylindrical member, moves longitudinally with the cylindrical member as the cylindrical member translates away from the predetermined position, moves radially outwardly, and then moves longitudinally relative to the cylindrical member to return to the initial position.

Claim 4

The combination of claim 2 wherein the cylindrical member includes a flange portion and a cam portion that are axially adjacent, the flange portion having a cylindrical surface portion against which the second arm bears while at the initial position, the flange portion further having a generally annular surface that pushes against the second arm as the cylindrical member translates away from the predetermined position, the cam portion acting against the second arm to push it radially outwardly.

Claim 5

A shutter releaser device in a photographic camera of automatic film transport type comprising: a. a movable member of a clutch mechanism provided in a drive transmission system for film transport having an operation cycle such that said movable member drives at its initial or retracted position a film transport mechanism as an electromotor rotates by one cycle after completion of shutter operation, then, as a result of increase of load occurring upon completion of film transport, moves to a position preparatory for release where said movable member performs sliding rotation, then, returns to said retracted position while continuing said sliding rotation and finally stopped at a position for driving of said film transport mechanism; b. a flange portion formed on said movable member so as to have its cylindrical surface on a peripheral wall of said movable member; c. a circular cam portion integrally formed on said movable member adjacent said flange portion, of which cam surface includes a part projecting beyond said cylindrical surface of said flange portion and the rest part being lower than said cylindrical surface; and d. a releaser member adapted to bear at one end against the cylindrical surface of said flange portion or the cam surface of said circular cam portion and to drive at the other end a shutter releaser mechanism, so arranged that operation of said flange portion and circular cam portion occurring as one operation cycle of said movable member goes on causes said one end to bear against the cylindrical surface of the flange portion during the driving of film transport, movement of said movable member to the position preparatory for release occurring upon completion of film transport causes said one end to bear against the lower cam surface of the circular cam portiOn, the subsequent return of said movable member to its initial or retracted position causes said one end to be operated by the side of said flange portion and thereby said other end effects shutter release, the subsequent rotation of said movable member at said initial or retracted position causes said one end to bear against the projecting cam surface and then to transfer from said projecting cam surface to the cylindrical surface of the flange portion to complete each shutter release or each cycle of release operation.

Claim 6

A shutter releaser device in a photographic camera of automatic film transport type comprising: a. a movable member of a clutch mechanism provided in a drive transmission system for film transport having an operation cycle such that said movable member drives at its initial or retracted position a film transport mechanism as an electromotor rotates by one cycle after completion of shutter operation, then, as a result of increase of load occurring upon completion of film transport, moves to a position preparatory for release where said movable member performs sliding rotation, then, returns to said retracted position while continuing said sliding rotation and finally stopped at a position for driving of said film transport mechanism; b. a flange portion formed on said movable member so as to have its cylindrical surface on a peripheral wall of said movable member; c. a circular cam portion integrally formed on said movable member adjacent said flange portion, of which cam surface includes a part projecting beyond said cylindrical surface of said flange portion and the rest part being lower than said cylindrical surface; and d. a releaser member adapted to bear at one end against the cylindrical surface of said flange portion or the cam surface of said circular cam portion and to drive at the other end a shutter releaser mechanism, so arranged that operation of said flange portion and circular cam portion occurring as one operation cycle of said movable member goes on causes said one end to bear against the cylindrical surface of the flange portion during the driving of film transport, movement of said movable member to the position preparatory for release occurring upon completion of film transport causes said one end to bear against the lower cam surface of the circular cam portiOn, the subsequent return of said movable member to its initial or retracted position causes said one end to be operated by the side of said flange portion and thereby said other end effects shutter release, the subsequent rotation of said movable member at said initial or retracted position causes said one end to bear against the projecting cam surface and then to transfer from said projecting cam surface to the cylindrical surface of the flange portion to complete each shutter release or each cycle of release operation.