| 摘要 |
PURPOSE:To enable a printing head mechanism to move laterally with a proper clearance in relation to the bottom frame by setting the printing had mechanism through a rotator on the bottom frame. CONSTITUTION:Two grooves 31 curved upwards with a comparatively large curvature radius laterally and extending straightly toward depthwise direction are formed on the upside of a bottom frame 3. The grooves 31 are formed on symmetrical positions of both sides with a smaller interval than the side width of a printing head mechanism 2, and a rotator 5 is set on the grooves 31. As a roller as the rotator, one such as a rubber molding with slightly soft back face, having a slightly high frictional coefficient, is used preferably. A fitting hole 21 is drilled in the frame positioned on left and right-handed both ends of the head mechanism 2, and a fitting pin 6 of smaller diameter than the hole 21 is thrust into the hole 21 and screwed with the bottom frame 3. The clearance as the difference in diameter between the hole 21 and the pin 6 is such as enough to allow the head mechanism 2 to vibrationally move. Lateral vibration to be generated in the head mechanism 2 with printing operations does not reach the bottom frame. |
