| 摘要 |
PURPOSE:To enable the edge of a shutter plate to pass through smoothly the tip of a cover, etc., by performing the chamfering of the outer plane of the edge at a side opposite to the edge side on one side of the case of the shutter plate. CONSTITUTION:An oblique plane 10 or roundness 20 is formed by performing the chambering of the outer plane of the edge 8a being positioned at a side opposite to the edge 3a on one side of the case 3. By forming a disk cassette in such way, the edge 8a can pass through the lower side of the tip 16a of the cover 16 in a direction of arrow head (e) since it an clear the tip 16a at a clearance angle theta by the oblique plane 19 and the roundness 20, etc., by warping the edge 8a of the shutter plate 8 of the shutter 9 at the upper side of the case 3 when the disk cassette is ejected in a direction of arrow head (d) outward a cassette input/output port 14 after the recording/reproduction of a recording and reproducing device 13 is performed even when the edge 8a of the shutter plate 8 is hooked on the tip part 16a of the cover 16 due to a trouble such as the change in the lapse of time or hooking, etc. |
