OPERATOR FOR TWO PINCH ROLLER OF RECORDER/REPRODUCER HAVING REVERSE MECHANISM

摘要

During the reverse switching in a cassette recorder, the one pinch roller has to be lifted off the capstan and the other pinch roller has to be pressed against the associated capstan. When lifting the pinch roller off the capstan, the force of the spring which presses the pinch roller against the capstan has to be overcome, with the result that the lifting off requires a greater force than the force of bearing pressure of the spring. To be able to carry out the reverse switching with little expenditure of force, there is provided a reverse slide which is shared by the two pinch rollers and by means of the ends of which the lever arms of a respective pressure-applying angle, assigned to each pinch roller and mounted such that it can swivel, can be moved. In this arrangement, a pressure-applying spring respectively extends between the lever arm of each pressure-applying angle and a point of application adjacent to the assigned end of the reverse slide. This arrangement brings about the effect that, during a displacing movement of the reverse slide when switching over, the two springs at least partially support each other in such a way that the displacement travel occurs partly without the influence of force, and that altogether the switching over can be carried out with little force.