Operation device of tape recorder

Abstract

An operation device of a tape recorder adapted to bring mechanisms such as a pinch roller, magnetic heads and so on into constant-speed tape feeding condition, making use of a part of torque of a member such as a capstan which is driven by a motor. The device has a manual operation system and an automatic actuating system. The manual operation system includes a manually operable constant-speed tape feed operation member and first locking means adapted to lock the manual operation member at an operation position to which the same has been displaced. The automatic actuating system includes a first rotary body adapted to be rotated in relation with the rotation of the shaft of the motor, a second rotary body having an engageable portion capable of performing a torque-transmitting engagement with the first rotary body and a non-engageable portion which cannot engage the first rotary body, an actuating plate adapted to be displaced by the rotation of the second rotary body and to control the position of the mechanisms, and second locking means to lock the mechanisms at a position to which they have been displaced. As the operation member is operated, it is locked at the operation position by the first locking means. A part of power for displacing the operation member to the operation position is transmitted to the second rotary body, which has confronted the first rotary body at its non-engageable portion, is slightly rotated to bring its engageable portion into engagement with the first rotary body, so as to be continuously driven by the latter. As the second rotary body is driven, it displaces the mechanisms through the actuating plate, and the mechanisms are held at the position to which they have been moved.