| 摘要 |
PURPOSE:To provide a titled compact paper feed mechanism which can avoid permanent destruction thereof with a simple construction in case of abnormal load applied thereon by interposing a spring between a driven gear and a paper feed roller. CONSTITUTION:This mechanism has a spring 5 interposed between a paper feed roller 3 and a driven gear 6 to give a rotating force to the driven gear 6. A drive gear 7 having a portion without tooth on the circumference thereof meshes the driven gear 6. When any abnormal load is working on a paper feed roller 3, the spring 5 stores the rotating force transmitted to the driven gear 6 and when the drive gear 7 comes off the driven gear 6 with further rotation thereof, the driven gear 6 is forced to turn in the opposite direction by the rotating force stored in the spring 5. The drive gear 6 comes to stop with a protrusion 6-1 contacting a plane 4-1 of a roller shaft 4 and thus, the gears 7 and 6 return to the state before they are meshed with each other. |
