Patent ID: 7775728

Claim:
A focal plane shutter for a camera, comprising: one or two shutter blade assemblies comprising two arms and at least one blade pivoted on the arms; one or two electromagnet assemblies comprising an iron core member and a coil; one or two driving means including a mounting member mounted with an iron scrap member, for bringing said iron scrap member into proximity with said iron core member, causing said iron scrap member to be attracted and held by said iron core member by energization of said coil is energized during photographing, and separating said iron scrap member from said iron core member to operate said shutter blade with a driving spring when said coil is deenergized; and a setting member configured to be operated from an initial position to operate said driving means to a set position against an biasing force of said driving spring in setting, and to return to the initial position before said shutter blade is operated, wherein said iron scrap member includes a shaft fitted in a mounting hole of said mounting member, an iron scrap portion provided at one end of said shaft and brought into contact with said iron core member, and a removal preventing flange provided at the other end of said shaft, a collar member is loosely fitted to said shaft between said mounting hole and said flange, an edge of said mounting hole is formed to have an arcuate surface protruding toward said collar member, and said collar member is formed to have, on the flange side, an arcuate surface protruding toward the flange and substantially perpendicular to said arcuate surface wherein tilt starting operation of the shaft can be smoothly performed.