In a magnetic tape recorder provided with normal and reverse operation comprising:
- a frame comprising a bottom wall having an inner side and an outer side and provided with an opening, at least one side wall and a front wall;
- a driving motor adapted to rotate in one direction for the normal operation and in the opposite direction for the reverse operation;
- two cassette spool driving gears, adapted to receive the spools on which said magnetic tape is wound, supported by two parallel axes protruding from said inner side of said bottom wall;
- a flywheel supported by an axis protruding from said outer side and connected to said motor of said tape recorder;
- and, a support for the magnetic head and the pinch roller of said tape recorder pivoted on a pin protruding from said inner side and biassed by elastic means towards a position where said magnetic head and said pinch roller are engaged with said tape, a unit for transmitting the movement of said flywheel to said cassette spool driving gears comprising:
- (a) a drive system automatically operating in normal forward and in reverse and in fast forward and rewind, both for the normal forward and reverse operations, comprising:
- a first and second double gears each having a gear wheel of a given diameter and a pinion of smaller diameter integral and coaxial therewith, said gear wheel and pinion being meshed with each other and supported by two axes carried by a movable flat support provided with means for the restrained movement on said outer side of said bottom wall having matching means, so as to assume three different positions, i.e. a first position for said normal forward, a second position for said fast forward and a third position for said fast rewind;
- an operation lever for said flat support and said support for said head and pinch roller;
- and, a control mechanism for said operation lever and a transmission output device of said drive system meshed with said second double gear and adapted to mesh with one or the other of said cassette spool driving gears and remain meshed therewith according to the direction of rotation of said second double gear;
- and
- (b) a braking device adapted to automatically brake, both in normal forward and in reverse and in fast forward and rewind, the cassette spool driving gear receiving the spool from which said magnetic tape is unwound, said braking device comprising:
- an elastic plate pivoted in the middle between said two cassette spool driving gears, so as to make limited angular movements, and having each end provided with a braking member pushed against the bottom of one of said cassette spool driving gears by the resilience of said plate;
- and, a disk pivoted together with said plate so as to move angularly in respect thereof, and provided both with engaging means, adapted to engage with matching engaging means carried by said operation lever of said drive system, said means forcing said disk to rotate with said lever, and with engaging means adapted to engage with matching engaging means carried by one or the other arm of said elastic plate, according to the direction of rotation of said plate, to move said one of said arms and move said braking member carried by said arm away from the corresponding cassette spool driving gear.