Inkjet head having a plurality of pressure chambers
AssigneeBrother Kogyo Kabushiki Kaisha
InventorMikio Sakuma
Life of this patent
Estimating the term…
Abstract
An inkjet head provided with a plurality of pressure chambers includes an actuator unit for the plurality of pressure chambers. The actuator unit includes a plurality of inactive layers and at least one active layer, both made of piezoelectric material. The plurality of inactive layers are arranged on a pressure chamber side to cover the plurality of pressure chambers. The at least one active layer is arranged on an opposite side of the pressure chambers with respect to the inactive layers. The active layer is segmented to a plurality of segments which are located at positions correspond to the plurality of pressure chambers. Further, each segment of the active layer is sandwiched between a common electrode and a driving electrode.
Claims16
An inkjet head, comprising:
- a plurality of pressure chambers, each of which being configured such that an end thereof is connected to a discharging nozzle and the other end is connected to an ink supplier;
- and
- an actuator unit for the plurality of pressure chambers,
- said actuator unit including:
- a plurality of inactive layers made of piezoelectric material, said plurality of inactive layers being arranged on a pressure chamber side to cover said plurality of pressure chambers;
- and
- at least one active layer made of piezoelectric material, said at least one active layer being arranged on an opposite side of said pressure chambers with respect to said plurality of inactive layers, said at least one active layer being segmented so as to correspond to said plurality of pressure chambers,
- wherein each segment of said at least one active layer is sandwiched between a common electrode and a driving electrode.
An inkjet head, comprising:
- a plurality of pressure chambers, each of which being configured such that an end thereof is connected to a discharging nozzle and the other and is connected to an ink supplier;
- and
- an actuator unit for the plurality of pressure chambers,
- wherein said actuator unit includes a plurality of inactive layers arranged on a pressure chamber side and formed of piezoelectric material and at least one active layer, arranged on an opposite side of said pressure chambers with respect to said inactive layers and formed of piezoelectric material, said plurality of inactive layers being arranged to cover said plurality of pressure chambers, said at least one active layer being segmented to locate at positions corresponding to said plurality of pressure chambers,
- wherein each segment of said at least one active layer is sandwiched between a common electrode and a driving electrode, and
- wherein each segment of said at least one active layer sandwiched between the common electrode and the driving electrode deforms in accordance with piezoelectric transverse deformation effect so that said each segment performs unimorph deformation in accordance with a voltage applied to each of said driving electrode.
Dependencies are inferred from the claim text.