| 摘要 |
<p>PURPOSE:To enable a stable traveling of a tape by retaining each end of both sides of a torsion coil spring whose coil is supported by a base plate, to a capstan housing and a roller supporting member respectively. CONSTITUTION:Both side ends of a torsion coil spring 12 which coil part 12a is supported by a base plate 1 are retained respectively to a capstan housing 6 for supporting freely rotatably a capstan 8 and a roller supporting member 9 for supporting freely rotatably a pinch roller 11. Then the capstan 8 and the pinch roller 11 are pressingly brought into contact with each other by energizing in putting the capstan housing 6 and the roller supporting member 9 into between both side ends of the torsion coil spring 12. Consequently, since a reaction force of the torsion coil spring 12 is canceled at the time of press- contacting between the capstan 8 and pinch roller 11, a bend of the capstan 8, etc., can be prevented. In this way, the perpendicularity of the capstan 8 is positively maintained at the time of press-contacting between the capstan 8 and pinch roller 11, thus obtaining a stable running of the tape.</p> |
