| 摘要 |
PURPOSE:To enhance the durability of a printing head, by providing an elastic member consisting of a pair of projections extending in almost parallel to the rocking axis of each armature from both sides of the armature on the leading end side of said armature and the arm part to be fined to the head body extending from the leading end of each projection in almost parallel to the armature. CONSTITUTION:Not only bending deformation but also tortional deformation are applied to each projection 24 by the deformation of an arm part 25 accompanying the shaking of each armature 14. Therefore, the concentration of stress at the fixed part of the projection 24 and the armature 14 is reduced and the enhancement of durability can be attained. Because each armature 14 is supported in a rocking manner by a torsion bar part 22, the vibration time of the armature 14 after printing operation is shortened to accommodate demand for high speed printing. |
