AUF ABRUF ARBEITENDER TINTENSTRAHLDRUCKKOPF.

摘要

A vibrating plate (10) made of a piezoelectric plate having a metal plate (16) and an electrode layer (14) provided on either surface thereof is secured by an adhesive or the like to a rectangular base member (2) having a rectangular window (4). The vibrating plate is cut into strips. Each strip is further cut at a position facing the base member window in a direction substantially orthogonal to the first cut line (20). One end of each strip is secured to the base member and the other end is left free; thus, reed pieces (23) are formed in cantilever from. A nozzle forming plate is disposed in alignment with the reed pieces to form a drive assembly. The drive assembly is immersed in ink. When an electric field is imposed on the piezoelectric plate, the reed piece (23) curves, and when it is removed, the metal plate recovers by virtue of its resiliency. During this operation, a resultant dynamic pressure acts on the ink to let fly an ink drop through a nozzle opening formed in the nozzle forming plate. Since each reed piece is formed by cutting the vibrating plate from one edge to the other so that all the reed pieces are separated from each other, the vibration of and an electrical signal to one reed piece can never disturbe other adjacent reed pieces; thus, vibration is stably generated and the ink drop is allowed to fly reliably.