| 摘要 |
PURPOSE:To provide a light wt. small-sized printing mechanism capable of performing high speed printing, by setting the moving direction of the movable part of a linear actuator and that of a printing head to mutually reverse directions to take dynamic balance without providing a counter balance. CONSTITUTION:The movement of the movable shaft 21 of a linear motor 2 moves the first link 40 pivotally supported at the end part of the movable shaft 21 in a freely rotatable manner by a shaft 21a and the second link 41 pivotally supported by a bracket 43 in a freely rotatable manner is rotated by the movement of the first link 40. The second link 41 moves a third link 42 through a shaft 46 and, by the movement of the third link 42, the printing head 1 pivotally supported by the second link 42 moves to the direction shown by an arrow. At this time, the moving direction of the movable shaft of the linear motor 2 is reverse to that of the printing head 1 and the total mass of the yoke 20 and permanent magnets 20a, 20b being the movable part of the linear motor 2 and the movable shaft 21 is determined by the mass of the printing head 1 and the lever ratio of the second link 41 to make equivalent mass almost the same. |
