Shutter device
AssigneeCanon Kabushiki Kaisha
InventorsYasuhiro Toyoda, Akira Tomitaka
Life of this patent
Estimating the term…
Abstract
A shutter device with a shutter base plate having an aperture part and a protruding part. First and second shutter blade members are arranged to travel a predetermined movement distance and a distance shorter than the predetermined distance, respectively, over the aperture part. The second shutter blade member has a slot engaging the protruding part of the base plate. First and second arm members are pivotally supported by the shutter base plate and the second arm member supports the first and second shutter blade members in a swingable manner. The second arm member is also connected to the second shutter blade member, wherein the first shutter blade member and the second shutter blade member are caused to travel over the aperture part by the second arm being driven,
Claims14
A shutter device comprising:
- a shutter base plate having an aperture part and a protruding part;
- a first shutter blade member arranged to travel a predetermined movement distance over the aperture part;
- a second shutter blade member arranged to travel a movement distance shorter that the predetermined movement distance of travel of said first shutter blade member over the aperture part said second shutter blade member having a slot engaging the protruding part, said slot being formed in a curved shape;
- a first arm member having one end part thereof pivotally supported by said shutter base plate and another end part thereof supporting said first shutter blade member in a swingable manner;
- and
- a second arm member having one end part thereof pivotally supported by said shutter base plate and another end part thereof supporting said first shutter blade member in a swingable manner, said second arm member being connected to said second shutter blade member,
- wherein said first shutter blade member and said second shutter blade member are caused to travel over the aperture part by said second arm member being driven.
A shutter device comprising:
- a shutter base plate having an aperture part;
- a first shutter blade member arranged to Travel a predetermined movement distance over the aperture part;
- a second shutter blade member arranged to travel a movement distance shorter than the predetermined movement distance of travel of said first shutter blade member over the aperture part, said first shutter blade member and said second shutter blade member traveling over the aperture part in a state of being linked to each other;
- imparting means for imparting a braking action to said second shutter blade member in the middle of the travel of said second shutter blade;
- and
- wherein said shutter base plate is provided with a protruding part, and said second shutter blade member is provided with a slot engaging the protruding part.
A shutter device comprising:
- a shutter base plate having an aperture part;
- a first shutter blade member arranged to travel a predetermined movement distance over the aperture part;
- a second shutter blade member arranged to travel a movement distance shorter than the predetermined movement distance of travel of said first shutter blade member over the aperture part, said first shutter blade member and said second shutter blade member traveling over the aperture part in a state of being linked to each other;
- and
- imparting means for imparting a braking action to said second shutter blade member the middle of the travel of said second shutter blade;
- wherein said shutter base plate is provided with a protruding part, and said second shutter blade member is provided with a slot engaging the protruding part;
- and
- wherein the slot of said second shutter blade member is formed in such a shape as to impart the braking action to said second shutter blade member in the middle of travel of said second shutter blade member.
Dependencies are inferred from the claim text.