Camera having a lens shutter mechanism

A camera having a lens shutter, comprising:

• shutter blades for exposing film to photographic light or intercepting said photographic light;
• an opening and closing means for opening and closing said shutter blades;
• a first driving means having a constraining means for driving said opening and closing means so as to drive said shutter blades in a direction permitting opening;
• a second driving means having a constraining means different from said constraining means, and thus cooperating with said first driving means in driving said opening and closing means so as to drive said shutter blades in a direction permitting opening;
• and
• a driving selecting means that selects whether said first driving means alone should be driven or both said first and second driving means should be driven.

A camera having a lens shutter, comprising:

• shutter blades for exposing film to photographic light or intercepting said photographic light;
• an opening and closing means for opening and closing said shutter blades;
• a first driving means for driving said opening and closing means so as to drive said shutter blades in a direction permitting opening;
• a second driving means that cooperates with said first driving means in driving said opening and closing means so as to drive said shutter blades in a direction permitting opening;
• and
• a driving selecting means that selects whether said first driving means alone should be driven or both said first and second driving means should be driven.

A camera having a lens shutter mechanism, comprising:

• a shutter means for forming a predetermined exposure aperture;
• a shutter opening and closing means for opening and closing said shutter means;
• an opening means for driving said shutter opening and closing means so that said shutter means forms said predetermined exposure aperture;
• a closing means for driving said opening means in a direction causing said shutter means to close said exposure aperture;
• and
• a bound prevention means for preventing said opening means from bounding and for retaining said opening means at a predetermined position.

A camera having a lens shutter, comprising:

• shutter blades for exposing film to photographic light or intercepting said photographic light;
• an opening and closing means for opening and closing said shutter blades;
• an opening driving means for driving said opening and closing means so as to drive said shutter blades in a direction permitting opening;
• and
• a closing driving means for driving said opening and closing means so as to drive said shutter blades in a direction permitting closing, said closing driving means having an open state retaining member;
• said open state retaining member retaining an opening driving state in which said opening and closing means is driven by said opening driving means, and thus retaining an open state in which said shutter blades are driven by said opening and closing means;
• said open state retaining means being interlocked with said opening driving means in order to free said opening and closing means from said opening driving state.

A collapsible camera having a lens shutter mechanism, comprising:

• a shutter means lying in a lens frame and forming an exposure aperture;
• a shutter opening and closing means lying in said lens frame so as to turn freely and causing said shutter means to open and close responsively to the turning;
• a restraining means that is formed in a securing support for supporting said lens frame, that when said lens frame collapses, guides said shutter opening and closing means resting on said lens frame, and that when said lens frame completes collapsing, restrains said shutter opening and closing means from turning;
• and
• a rotation control means that is locked in a securing support for supporting said lens frame, and that when said lens frame thrusts at a position permitting photography, rotates said shutter opening and closing means in a predetermined direction.

A camera having a lens shutter, comprising:

• shutter blades for exposing film to photographic light and intercepting said photographic light;
• an opening and closing means for opening and closing said shutter blades;
• a photographic optical system having at least said opening and closing means, being movable along the optical axis, and lying at different positions along the optical axis between a photographic state and a non-photographic state;
• an opening driving means for driving said opening and closing means so as to drive said shutter blades in a direction permitting opening, said opening driving means being engaged with said opening and closing means only when said optical system lies at a position associated with said photographic state;
• a closing driving means for driving said opening and closing means so as to drive said shutter blades in a direction permitting closing, said closing driving means being engaged with said opening and closing means only when said optical system lies at a position associated with said photographic state;
• and
• an opening and closing restricting means that when said photographic optical system lies at a position different from said position associated with said photographic state, restricts movements of said opening and closing means.

A camera having a lens shutter mechanism, comprising:

• a lens frame;
• a shutter means in said lens frame for forming a predetermined exposure aperture;
• a shutter driving means in said lens frame for opening said shutter means;
• an aperture speed selecting means outside of said lens frame for selecting an aperture speed;
• and
• an aperture speed changing means outside of said lens frame and interlocked with said aperture speed selecting means in order to drive said shutter driving means, said aperture speed changing means including a plurality of lever means constrained to move in the same direction by a plurality of elastic means.