| 摘要 |
<p>PURPOSE:To enable a mode change operation without using driving force of a solenoid, etc., but with only one motor by transmitting the rotation of a center gear to be driven by the motor to a reel base gear via a reversing gear and moving a head base utilizing a cam gear as well. CONSTITUTION:When the motor 43 is turned in the direction of an arrow B, the center gear 3 is turned via a belt 45 is the direction of C, and the cam gear 36 is turned around a shaft 17 in the direction of D via the reversing gear 35, and then the head base 18 is advanced by regulating a groove cam 38. Then, when a pin 21 is brought into contact with one end of the groove cam 38, the cam gear 36 is regulated in its turn, and this stopping position is detected by a leaf switch 42. When the center gear 32 is further turned in the direction of C, the reversing gear 35 is turned in the direction of E elastically deforming a rectangular notched part 37 of the cam gear 36, and meshed with the reel base gear 28 made of steel, and at this time, a pinch roller 24 is being pressed to a capstan shaft 30, thus making a recording/reproducing mode effective.</p> |
