| 摘要 |
<p>Described is an actuator unit (10) for a laminated ink jet recording head including a first cover member (1) for forming a vibrating member having piezoelectric vibrators (4,4') on a surface thereof; a spacer (5) for forming pressure generating chambers (2,2') with a surface thereof sealed by the first cover member (1); a second cover member (6) having ink jetting outlets (7,7') and ink flowing inlets (8,8'), each ink jetting outlet (7,7') causing the corresponding pressure generating chamber (2,2') to communicate with a corresponding nozzle opening (30,30') of a flow path unit (20) at one end of the pressure generating chamber (2,2'), each ink flowing inlet (8,8') causing the corresponding pressure generating chamber (2,2') to communicate with a common ink chamber (26,26') of the flow path unit (20) at the other end of the pressure generating chamber (2,2'). The actuator unit is prepared by laminating and fixing the first cover member (1), the spacer (5) and the second cover member (6). A pitch at which the pressure generating chambers (2,2') are arranged is set to a value equal to or smaller than a pitch at which the nozzle openings (30,30') are arranged; widths of partition walls (5a,5b) on outermost ends of pressure generating chambers (2,2') located on the outermost ends are set to a value equal to or greater than a width of a partition wall (5c) defining adjacent pressure generating chambers (2,2') and equal to or smaller than 1/2 of the nozzle opening arrangement pitch. An increase in the distance between the adjacent pressure generating chambers (2,2') at the contact line between two actuator units is set to within a range of values substantially equal to the width of the partition wall. <IMAGE></p> |
