Film winding device for single-lens reflex camera

Claim 1

A film winding device for a single-lens camera requiring no preliminary ''''blank'''' exposure operations, comprising a wind-up limiting cam secured to a wind-up shaft, a wind-up limiting lever engageable with said wind-up limiting cam, a slide plate for engaging and disengaging said wind-up limiting lever with said wind-up limiting cam, a slide plate charge lever for actuating said slide plate to retain said wind-up limiting cam in response to a wind-up operation, a key lever for retaining said slide plate charge lever in wind-up position, a mirror lowering lever operable in response to the wind-up operation and adapted to release the retention of said key lever in response to return of the wind-up operation, a retainer lever for retaining said mirror lowering lever in wind-up position, a major release lever adapted to release the retention of said retainer lever in response to completion of shutter operation, a projection cam integral with an automatic return film counter, a release lever for returning said automatic return film counter in response to opening or closing of a back cover of the camera, and a control lever associated with said release lever for actuating said major release lever and having a portion thereof engaged with said projection cam, said projection cam having a projection formed thereon for stopping the return motion of said control lever when said automatic return film counter has returned to its operating position.