Patent ID: 7780265
Filing Date: 2010-08-24
Classification: B41J,Y10T

Abstract:
1. An ink-jet head comprising: a passage unit having a plurality of pressure chambers communicating with nozzles; an actuator unit that changes the volumes of the plurality of the pressure chambers; and a flexible print cable that supplies a driving signal to the actuator unit, wherein the actuator unit includes, a piezoelectric member fixed to the passage unit so that it extends across the plurality of the pressure chambers; an inner electrode formed so that it extends across the plurality of the pressure chambers in the piezoelectric member, a plurality of individual electrodes formed at positions corresponding to the plurality of the pressure chambers on a surface facing a direction opposite to a facing direction of a fixing face of the piezoelectric member to the passage unit; one or more first surface terminals that are formed on the surface of the piezoelectric member and are also electrically connected to the inner electrode; and a plurality of second surface terminals that are formed on the surface of the piezoelectric member and are also electrically connected to the plurality of the individual electrodes, wherein a partial area of the flexible print cable confronts the surface of the piezoelectric member and an adjacent area continuous to the partial area extends in a direction away from the surface of the piezoelectric member, wherein the flexible print cable has, in the partial area, one or more first connection terminals electrically connected to the one or more first surface terminals and a plurality of second connection terminals electrically connected to the plurality of the second surface terminals, wherein a distance between an end and the first surface terminal disposed closest to the end is equal to or greater than a distance between the end and the second surface terminal disposed closest to the end, the end being present at the most downstream position on the surface of the piezoelectric member with respect to a first direction toward the adjacent area on the partial area along the surface, and wherein the flexible print cable is adhered to the piezoelectric member at a more downstream position than the first and second surface terminals with respect to the first direction, via a thermosetting adhesive.