| 摘要 |
A camera shutter has a set of opening shutter blades and a set of closing shutter blades. A shutter driver mechanism alternately displaces the opening and closing shutter blades to a first position wherein the blades are fanned-out and cover a shutter opening and a second position wherein the blades are retracted and do not cover the shutter opening. The shutter driver mechanism has an engaging pawl having a lower protrusion that pushes an upper protrusion on the top surface of an arm that supports the shutter blades when they are in the first position to thereby urge the shutter blades into intimate contact with each other. Prior to the start of an exposure, the lower protrusion stops pushing the upper protrusion so that the shutter blades can move freely during an exposure operation.
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