| 摘要 |
<p>The hook (2a) of a lid lock (2) is urged by a spring (48) so that an outer lid (41) integral with the lid lock pawl (45) is locked closed. At that time, the hook (2a) is abutted against the side surface of a lid lock pawl (45) which is formed in the side board of an outer lid (41). In the case where an impact is applied to the magnetic tape cassette, the impact force is absorbed by the side surface of the lid lock pawl (45) and the lid lock (2). At that time, an arcuate surface (2b) confronting with the end portion of the lid lock pawl (45) prevents the end portion (45a) of the lid lock pawl (45) from being collapsed or rolled up. Accordingly, the occurrence of troubles such as the deterioration in function of the lock mechanism, and the biting of the magnetic tape is prevented.</p> |
