| 摘要 |
A shutter set includes a first vane and a first vane stop. The first vane is moveable between a first position and a second position. The first vane stop is selectively moveable between a locking position and a free position, relative to the first vane. The first vane stop is configured to apply a bias force or is configured to bias the first vane by a predetermined clearance distance when the first vane stop is in the locking position, and is configured to allow movement of the first vane between the first position and the second position when the first vane stop is in the free position.
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