发明授权
- 专利标题: magnetic tape cassette having improved dust proofing
- 专利标题(中): 磁带盒具有改进的防尘性能
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申请号: US549524申请日: 1990-07-05
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公开(公告)号: US5006947A公开(公告)日: 1991-04-09
- 发明人: Shozo Onmori , Daisuke Takahashi , Kengo Oishi
- 申请人: Shozo Onmori , Daisuke Takahashi , Kengo Oishi
- 申请人地址: JPX Kanagawa
- 专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人: Fuji Photo Film Co., Ltd.
- 当前专利权人地址: JPX Kanagawa
- 优先权: JPX63-31697[U] 19880311; JPX63-69850[U]JPX 19880325
- 主分类号: G11B23/087
- IPC分类号: G11B23/087
摘要:
A magnetic tape cassette, such as a high performance video cassette, having a greatly improved dust-proofing function. In a first embodiment, operating portions of brake members which engage a brake release lever which is inserted into the cassette at the time of recording or reproduction to release the braking system of the cassette are formed in an inverted cup shape so as to close the hole through which the brake release lever is inserted and to contain the end of the brake release lever when inserted into the hole. In a second embodiment, separate engagement and abutment portions are provided for each brake portion so as to prevent inadvertent opening of the hole if the tape reels are moved during storage. In a third embodiment, the dust-blocking member takes the form of a slitted flexible sheet member covering the hole when the cassette is not in use.
公开/授权文献
- US5726268A Methyl methacrylate polymer 公开/授权日:1998-03-10