ONE-WAY CLUTCH ASSEMBLY

摘要

In a reel assembly of a tape cassette a one-way clutch mechanism is provided which serves to prevent rotation of the reel in the direction required for the purposes of rewinding a tape thereon. The one-way clutch mechanism includes a slipway channel (80) which extends circumferentially of the axis of rotation of the reel. The reel assembly includes a first clutch member (34) which is designed to be driven by the power output shaft of the winding mechanism and a second member (36) which is designed to be held fast with respect to the cassette. A slipway channel is formed at an interface between the first and second clutch members such that a portion of the channel is formed in the first member and a portion of the channel is formed in the second member. A pawl displacing ring (40) is mounted in the slipway channel so that it bears against the second member and is drivingly connected to the first member by means of a pawl. The pawl (38) is pivotally mounted in the first member and is movable between a retracted position out of engagement with the second clutch member and an extended position in which it engages the second member to prevent relative rotation between the first and second members. The displacer ring serves to displace the pawl outwardly from its retracted position to its extended position in response to rotation of the first member in the second rotational direction.