| 摘要 |
The box (26) of loose components has an opening with a shutter across and rails (29) to engage grooves (11) in the cassette (1). The plate (19) lies at the head of the cassette and rotates on a support rod (24) against the force of a helical spring (23). When the box is inserted,l it butts against a projection (22) on the plate which consequently rotates. Alternatively, the plate may slide in a groove against linear springs and be opened by the action of a similar projection, by a wheel which is rotated by the insertion of the box or by the mutual attraction or repulsion of a pair of magnets.
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