| 摘要 |
<p>PROBLEM TO BE SOLVED: To secure fixing force for engaging a supply reel collar with a supply gear, with a simple structure with O-ring and using a conventional supply reel collar. SOLUTION: A supply reel collar 12 is fitted into a supply gear shaft 9, a spring 14 is wound up in a gap part 15 formed with a step part 10 of the supply gear shaft 9, and a holding button 16 is provided thereon. Then, a detent projection 21 at the lowest end of the holding button 16 is engaged with a receive slot 11 on the back side of the supply gear shaft 9, and the upper part of the holding button 16 is engaged with the upper part of the supply reel collar 12 respectively, resulting in a unit, moreover, a supply gear rotary shaft 5 is fitted into a hollow part at a lower part of the holding button 16. Thereby, a supply gear 7 can be firmly engaged with the supply reel collar 12 using the elastic property of the spring 14.</p> |
