| 摘要 |
PURPOSE:To increase a printing speed by making the tilting movement of a tilting body light, by a method wherein a body to operate in conjunction with each other is parallelly moved in the expansion and contraction direction of a piezoelectric element with respect to the first support of a frame main body by the expansion and contraction of the piezoelectric element and the tilting body is tilted around the hinge point on the side of the second support to allow a printing wire to advance and retract. CONSTITUTION:When a voltage is applied between both electrodes of a piezoelectric element 5 and said element 5 extends in the direction shown by an arrow A, a body 14 to operate in conjunction with each other is parallelly moved in the extending direction of the piezoelectric element 5 in a state supported by both upper and lower link parts 8, 9. With the movement of the body 14, a tilting body 17 is tilted around the sixth hinge part 15 on the side of the second support 4 in the direction shown by an arrow B. Both of the first and second leaf springs 18, 19 are elastically deformed in a curved shape by the tilting of the tilting body 17. By markedly increasing the extension of the piezoelectric element 5 by the tilting of the tilting body 17 and the elastic deformation of the leaf springs 18, 19, the stroke of a printing wire 21 necessary for printing is obtained. When the piezoelectric element 5 is shortened to the original state, the body 14, the tilting body 17 and the leaf springs 18, 19 are respectively returned to the original states and the printing wire 21 is retracted. |
