| 摘要 |
<p>PURPOSE:To obtain a tape running switching mechanism which can be made compact by use of minimal members and also is capable of stably performing a tape running switching operation. CONSTITUTION:The tape running switching mechanism is provided with a prime pinion gear 10, a transmission body 11 and an oscillating arm 12, etc. As for the transmission body 11, transmission gears 11a and 11b are selectively engaged with reel gears 2a and 2a, or a cam gear 9 in accordance with the oscillating angle position of the oscillating arm 12. The oscillating arm 12 is provided with a cam surface 12a and a pressure member 14, and the cam surface 12a functions as a cam for generating a moment for rotating the oscillating arm 12 in an angular direction where the transmission gear 11a is engaged with the cam gear 9 when the pressing force of the pressure member 14 is applied on the cam surface 12a, and also, the arm is provided with an engaging part 12b. The pressure member 14 is supported by a pressure lever 14a equipped with a spring 15 and a solenoid 16 so that it can be freely moved back and forth.</p> |
