| 摘要 |
PURPOSE:To open and close a roller guide by rotation in the same direction of a motor, by driving an arm which detains the roller guide, by a prescribed arm for converting the rotation of the motor to a reciprocating motion. CONSTITUTION:An arm 20 which detains a roller guide 6B to the tip is fitted to a shaft 23 of a cassette, and an arm 40 is stuck to the same shaft, a roller 37 of the tip of an arm 36 connected to a disk 33 is brought into press-contact, and the guide 6B is driven by the arm 36. A guide 6A is also driven by an arm 32 in the same way. The arms 32, 36 execute a reciprocating motion by rotation of the disk 33. Accordingly, when the motor is rotated in the same direction, the arms 32, 36 execute a reciprocating motion, the roller guides 6A, 6B can be set to an opened or closed state, and a controlling circuit for rotating the motor in the forward or reverse direction becomes unnecessary, therefore, the mechanism becomes inexpensive. |
