| 摘要 |
The improved tape cartridge of the present invention comprises a hollow casing formed of a top cover and base member releasably secured together, as by vertically oriented opposed locking members, a tape holder rotatably secured in the casing, and an endless roll of tape on the holder. Improved means for automatically preventing movement of the tape (and thus danger of tangling) except when in a sound reproducing device are provided. Such means are in the form of a pair of resilient arms secured to opposite sides of the casing and bearing wedge-shaped heads directed against the underside of a movable portion of the top cover. That movable cover portion in turn has on its underside a brake bar which bears against the upper margin of either the tape roll or the tape holder itself to prevent rotation of the roll, except when the movable cover portion is biased upwardly by the heads. This occurs only when the heads are pressed against the casing upon insertion into a sound reproducing mechanism. The heads act through openings in depending portions of the top cover so as to prevent distortion of the casing. The cartridge may also include a knock-out portion to receive an erase prevention sensing pin and a hinged front portion to facilitate loading and guiding of the tape around internal tape guides. The cartridge is simple, durable, inexpensive and effective. It can be easily assembled automatically merely by vertical movements of its relatively few components.
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