| 摘要 |
PURPOSE:To prevent a breakage of connecting members by a constitution to decrease a bending stress acted on connecting plate members which transfer a couple of opposite displacements produced in case of a dot-printing by a dimensional distortion of piezoelectric element. CONSTITUTION:A piezoelectric element 2 is elongated by impressing a driving voltage and its dimensional distortion is transferred to movable members 7, 8 through connecting members 3, 5, further it is transferred to another member 11 through connecting members 9, 10, thus a wire attached to a point P5 is acted upon by this displacement. According to this displacement when a wire operates a dot printing, the direction of component force at a point P6 is shown as an arrow mark, and its strength is equal to a reaction force G, and because a couple of forces are caused if a distance (d) is not zero, members 9, 10 are acted by the bending force. Accordingly, by constituting a mechanism so as to decrease a distance (d) as negligibly small, members 9, 10 are not substantially acted by the bending force, thus the breakage can be satisfactorily prevented. |
