摘要 |
<p>A focal-plane shutter (105) includes a leading blade driving member (4) rotatably fitted onto a first shaft (1d) and driven by a biasing force of a leading blade driving spring (8), a trailing blade driving member (5) rotatably fitted onto a second shaft (1e) and driven by a biasing force of a trailing blade driving spring (9), a leading blade adjusting member (6) rotatably fitted onto the first shaft (1d) and adjusting the biasing force of the leading blade driving spring (8), a trailing blade adjusting member (7) rotatably fitted onto the second shaft (1e) and adjusting the biasing force of the trailing blade driving spring (9), and an upper base plate (3) including a first surface (3a) and a second surface (3b) that are thrust position limiters. An area of the first surface (3a) is larger than that of the second surface (3b).</p> |