| 摘要 |
PURPOSE:To effectively control a flow rate by providing a manual resetter for pressing or rotating a plunger to move it forward. CONSTITUTION:A fine distance stepless drive type actuator A is composed by telescopically attaching a plunger (d) along an axis concentrically within a cylindrical actuator casing (c) having front and rear walls (a), (b), and arranging a piezoelectric element assembly B made of 4 piezoelectric elements (e)...(h) concentrically on the outer periphery. The elements (g), (h) are disposed at the center on the casing, and cantilever elastic bridges (i), (j) are secured at the base ends to the elements (g), (h). The plunger (d) can be moved in an axial direction by controlling the sequence of applying a voltage to the elements (e)...(h). In this case, a manual reset button (p) is attached to the position opposite to the plunger (d) at the center of the wall (b). A flowout accident can be prevented by pressing it. |
