| 摘要 |
<p>PURPOSE:To suppress the transmission of vibration to a stopper considerably by absorbing outside vibration at a multi-layer structural part by a method wherein for a cover at a range which at least contains a pair of stoppers, materials with different elastic moduli are combined into a multi-layer structure. CONSTITUTION:A cover 3 of a magnetic tape cassette storage case 1 engages with engaging parts 10, 10' of a pair of hubs 8, 8' when a magnetic tape cassette is contained, and it is equipped with a pair of stoppers 5, 5' which stop the rotation of the pair of hubs 8, 8'. A part of the cover 3, which contains the pair of stoppers 5, 5' is constituted by combining materials with different elastic moduli in two layers. The part of the cover 3 consists of two layers of a high elastic modulus material P1 which has a comparatively high elastic modulus and a low elastic modulus material P2 which has a comparatively low elastic modulus. By this method, the transmission of outside vibration to the stoppers 5, 5' can be suppressed.</p> |
