Lens-fitted photographic film unit having shutter with connection lever and crank lever

In a lens-fitted photographic film unit previously loaded with unexposed photographic film and having a taking lens, and an exposure mechanism for exposing said photographic film, said exposure mechanism comprising a shutter actuating member which is moved from a released position to a cocked position upon one frame advance of said photographic film, and returns to the released position under a biasing force upon a shutter release operation, and a shutter blade member which is biased toward a closed position for closing an aperture disposed on an optical axis of said taking lens and makes one reciprocating movement between said closed position and an open position for opening said aperture while said shutter actuating member returns to the released position, the improvement comprising:

• a connection lever which is caused by said shutter actuating member to swing from an initial position to a turning position against a biasing force and swing back to said initial position under the biasing force while said shutter actuating member returns to the released position;
• and
• a crank lever having an axial portion extending parallel to said optical axis and first and second radial arms on opposite ends of said axial portion, wherein said connection lever is coupled to said first arm of said crank lever, whereas said shutter blade member is coupled to said second arm so as to permit said shutter blade member to swing in a different plane from said connection lever with respect to said optical axis.