| 摘要 |
A composite door assembly for a magnetic tape cassette includes a hinge pin having a first torsion spring element at one end encapsulated in the molded door, a second torsion spring element disposed at an opposite end of the pin for mounting on the cassette, with the opposite ends of the hinge pin secured to the cassette to mount the door on the cassette, and with the first and second torsion spring elements biased to maintain the door in a closed position.
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