| 摘要 |
<p>PURPOSE:To eliminate a torsion spring at a driven side and to cut down a cost by forming a synchronizing shaft propagating drive force to a cassette with a synthetic resin and pressing the cassette due to the torsion rigidity of the shaft. CONSTITUTION:Right and left drive gears 16a and 16b are linked by the synchronizing shaft 20 made of a synthetic resin. The guide roller 4a of a cassette holder is engaged with the guide groove 18a of a right drive arm 17a, and a back is of the same structure. However, the torsion spring for pressing the cassette is installed only on the front. If the cassette 1 is inserted with this constitution, the prescribed motor turns the arm 17a, and the guide roller 4a is guided to a groove 11a. The cassette 1 is loaded at the prescribed position, and pressed and held due to the energization of the torsion spring and the rigidity of the shaft 20. Accordingly the torsion spring at the following side is made unnecessary to reduce the cost.</p> |
