Manual film-advance device for a multiple-exposure and normal photography camera

A manual film-advance device for use in a camera including a film-advance drive system and a shutter charge drive system which are actuated in conjunction with actuation of a film-advance lever from a film-advance starting position to a fully-actuated point, the device comprising:

• a multiple-exposure/normal photography changeover mechanism which actuates both the film-advance drive system and the shutter charge drive system in conjunction with the actuation of the film-advance lever when the multiple-exposure/normal photography changeover mechanism is in a normal photography state, and which actuates a film-overadvancing prevention mechanism so as to actuate only the shutter charge drive mechanism in conjunction with the actuation of the film-advance lever when the multiple-exposure/normal photography changeover mechanism is in a multiple-exposure photography state;
• and
• a lock mechanism which operates in conjunction with commencement of operation of the shutter charge drive system actuated in conjunction with the actuation of the film-advance lever when the multiple-exposure/normal photography changeover mechanism is in the multiple-exposure photography state or the normal photography state, and which locks the multiple-exposure/normal photography changeover mechanism in the multiple-exposure photography state or the normal photography state.

A manual film-advance device for use in a camera including a film-advancing system and a shutter charge drive system, the device comprising:

• a movable member having a multiple-exposure/normal photography changeover operation button, the movable member being associated with the film-advancing system and movable between first and second positions;
• and
• a change-operation linking member driven by the shutter charge drive system from a third position to a fourth position, wherein the change-operation linking member in said fourth position is engageable with the movable member in said first position to inhibit the movable member from moving toward said second position, and engageable with the movable member in said second position to inhibit the movable member from moving toward the first position.