Automatic stop mechanisms for tape recorders

An automatic stop mechanism for a tape recorder, comprising

• a circular member being disposed at one end of a take-up reel and having a driving pin extended longitudinally from the circumference thereof;
• a swing member hinged onto a main board of the tape recorder, having
• a shaft,
• a sensing arm that can rotate around the shaft,
• a hole provided at one end of the arm, which receives the driving pin, and
• a driving arm extended from the shaft, having an end portion,
• wherein the driving pin moves in an arc track within the hole to apply a force to the swing member so as to generate a torque in one direction;
• a driving member disposed onto an end surface of a flywheel driven by a motor, which can make the driving arm push a locking level to move transversely, comprising:
• a cam being located onto the end surface of a flywheel and being coaxial therewith, and
• a block located at a side of the cam that forms a channel with the block to allow the end portion of the driving arm to slide therethrough;
• and
• a torsion spring member configured to make the end portion of the driving arm cling to the periphery of the cam when a stop button of the tape recorder is pressed down.