| 摘要 |
<p>A tape cassette includes a housing; a supply reel rotatably mounted in the housing for supplying tape and having a lower flange section with teeth around the periphery thereof; a take-up reel rotatably mounted in the housing for taking up the tape; a pivot pin mounted in the housing between the supply and take-up reels; and a control member including a ring portion pivotally mounted on the pivot pin, a receiving plate secured to the ring portion and having a frictional contact surface in elastically forced contact with the underside of the lower flange section of the supply reel, and a lock member secured to the receiving plate, such that rotation of the supply reel in the rewind direction frictionally rotates the receiving plate about the pivot pin to pivot the lock member into engagement with the teeth to prevent rotation of the supply reel in the rewind direction and rotation of the supply reel in the forward playback direction frictionally rotates the receiving plate about the pivot pin to pivot the lock member out of engagement with the teeth to permit rotation. of the supply reel in the forward playback direction.</p> |
