Shutter device and image pickup apparatus
A shutter device makes it possible to restrict bounding of a shutter blade using a shock-absorbing member when movement of the shutter blade is completed. In addition, the shutter device makes it possible to reduce production of dust that is produced when the shock-absorbing member and the shutter blade collide with each other. Examples of dust are wear powder and flake.
1. A shutter device comprising:
a shutter blade;
a shock-absorbing member configured to absord shock when movement of the shutter blade is completed; and
a blade contact member configured to contact the shutter blade by covering a surface of the shock-absorbing member to prevent the shutter blade from directly contacting the shock-absorbing member, wherein the blade contact member is not joined to the shock-absorbing member.
2. The shutter device according to claim 1 , wherein the blade contact member is formed of a material having a wear resistance that is greater than that of the shock-absorbing member.
3. The shutter device according to claim 1 , wherein the shock-absorbing member is deformed by deformation of the blade contact member resulting from collision of the shutter blade with the blade contact member.
4. The shutter device according to claim 1 , wherein after the shutter blade collides with the blade contact member, the blade contact member collides with the shock-absorbing member.
5. The shutter device according to claim 1 , wherein the shutter blade comprises a plurality of shutter blades including a first curtain shutter blade unit that moves from a position where the first curtain shutter blade unit covers an opening to a position where the first curtain shutter blade unit withdraws from the opening.
6. The shutter device according to claim 1 , wherein an elastic modulus of the shock-absorbing member is less than an elastic modulus of the blade contact member.
7. The shutter device according to claim 1 , wherein there is a gap between the blade contact member and the shock-absorbing member before completing the movement of the shutter blade.
8. A shutter device comprising:
a first curtain shutter blade unit that moves from a position where the first curtain shutter blade unit covers an opening to a position where the first curtain shutter blade unit withdraws from the opening;
a first shock-absorbing member configured to absorb shock when movement of the first curtain shutter blade unit is completed;
a blade contact member configured to contact the first curtain shutter blade unit by covering a surface of the first shock-absorbing member to prevent the first curtain shutter blade unit from directly contacting the first shock-absorbing member, wherein the blade contact member is not joined to the first shock-absorbing member, and the blade contact member being formed of a material having a wear resistance that is greater than that of the first shock-absorbing member;
a second curtain shutter blade unit that moves from a position where the second curtain shutter blade unit withdraws from the opening to a position where the second curtain shutter blade unit covers the opening; and
a second shock-absorbing member configured to absorb shock when movement of the second curtain shutter blade unit, the second shock-absorbing member being formed of the same material as the first shock-absorbing member.