| 摘要 |
<p>PURPOSE:To eliminate a mechanical sliding mechanism with use of a unit of motor and at the same time obtain the strong driving force for the quick winding and rewinding, by obtaining the constant tape travel driving force from one of the two output shafts and also obtaining the take-up driving force from either one of the two output shafts. CONSTITUTION:A coil 5 generates the rotary magnetic field for a motor 3, and a rotor 12 is connected electromagnetically to a magnet 11 and a rotor 11 to be opposite to the coil 5 and turned by the rotation of the rotor 11. Capstans 14 and 15 are driven by the rotor 11 via a shaft 7, a pulley 8 and a belt 17 respectively to obtain the constant travel driving force of a tape. At the same time, the contact of an idler 23 is switched to a pulley part 13 or an idler 9 with a selecting means comprising rocking and selecting arms 24 and 27 plus an electromagnetic solenoid 29. As a result, the driving force of reels (21 and 30) can be switched to the weak turning force by the rotor 12 or the strong turning force by the rotor 11.</p> |
