| 摘要 |
<p>PURPOSE:To prevent the breakage of a cartridge housing forward/backward mechanism and so on by the collision of a holding mechanism and a cartridge by providing a rod to enter into a taper attached guide groove and a sensor unit provided on the rod and tracing the guide groove with the rod. CONSTITUTION:A taper attached guide groove 15 formed in a cartridge housing 3, a rod 7 fitted to a holding mechanism 1 side to receive force from the taper attached guide groove 15 by the forward/backward of a holding mechanism 1, and a sensor unit 8 detecting the force which the rod 17 receives from the taper attached guide groove 15 are provided. Also a motor driving circuit to process a signal from the sensor unit 8 and to drive a motor 5 in a direction in which the force to be received by the rod 7 becomes small is provided, the taper attached guide groove 15 is traced with the rod 7 attached to the holding mechanism 1. Thus, the relative position error of a cartridge 2 and the holding mechanism 1 can be removed broadly and the breakage of a forward/backward mechanism 4 by the collision of both, the damage of the cartridge housing 3 and so on can be prevented.</p> |
