| 摘要 |
An automatic, pneumatic reel latch, comprising a hub adapted to be attached to a drive shaft of a tape deck, the hub has an annular groove forming an inner cylindrical surface and an outer thin cylindrical shell. A cup-shaped piston is fitted with a rolling diaphragm and inserted into the groove. A plurality of tapered flats are molded on the outer surface of the piston. Compressed air is supplied through an axial bore in the drive shaft, into the cylinder, causing the piston to move out of the groove, and by cam action of the lands, move outwardly a plurality of roller friction pad assemblies, having friction pads on their outer surfaces. A tape reel is adapted to slide over the latch and to be outside of, and co-planar with, the friction pads. The pneumatic pressure of the piston will force the friction pads into contact with the reel, providing sufficient friction to drive the reel in synchronism with the hub.
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