Patent ID: 7677708

Claim:
A discharge device comprising: a channel section in which a plurality of channels are formed, each channel having an introduction hole into which a fluid is introduced, a pressurizing chamber which communicates with the introduction hole and a discharge hole which communicates with the pressurizing chamber to discharge the fluid; and an actuator section having a top plate, a pair of support walls arranged at opposite ends of the top plate and a plurality of piezoelectric elements hanging from the top plate, spread between the pair of support walls, arranged independently of one another and forming pairs with the channels, the top plate, the pair of support walls and the plurality of piezoelectric elements being formed of a ceramic material and integrally fired, ceiling walls of the pressurizing chambers constituting the channels of the channel section being relatively thin walls as compared with another portion, the actuator section being attached to the channel section so as to allow distal end surfaces of the piezoelectric elements hanging from the top plate of the actuator section to abut on the ceiling walls, the ceiling walls being bent by displacements of the piezoelectric elements to change capacities of the pressurizing chambers, the fluid being pressurized to discharge the fluid from the discharge holes.