Patent ID: 8789931

Claim:
A liquid jetting apparatus configured to jet a liquid comprising: a liquid jetting head including: a channel unit in which a plurality of channels including a plurality of nozzles and a plurality of pressure chambers communicating with the nozzles is formed, and a piezoelectric actuator including a piezoelectric layer stacked on the channel unit to cover the pressure chambers and a plurality of individual electrodes facing the pressure chambers; an elastic deformation layer arranged on a surface, of the piezoelectric actuator, on a side opposite to the channel unit; a plurality of head-side contact points arranged on a surface, of the elastic deformation layer, on a side opposite to the piezoelectric actuator, and being in electrical conduction with the individual electrodes; a substrate arranged to face a surface, of the liquid jetting head, on a side of the piezoelectric actuator; a plurality of substrate-side contact points arranged on a surface, of the substrate, on a side of the liquid jetting head so that the substrate-side contact points face the head-side contact points; and a fixing member configured to fix the liquid jetting head and the substrate to each other, wherein the elastic deformation layer is configured such that under a condition that the fixation member fixes the liquid jetting head and the substrate, a portion of the elastic deformation layer, on which the head-side contact points are arranged, is sandwiched by the piezoelectric actuator and the substrate to undergo elastic deformation, while pressing the head-side contact points to contact with the substrate-side contact points by a force arising from a tendency to restore a state before elastic deformation.