Patent ID: 6921159
Filing Date: 2005-07-26
Classification: B41J,Y10T

Abstract:
1. A multi-nozzle ink jet head having a plurality of nozzles that eject ink, comprising: a head substrate in which are formed said plurality of nozzles and a plurality of pressure chambers; a diaphragm that covers said plurality of adjacent pressure chambers; a plurality of piezo elements provided on said diaphragm that are provided in correspondence with said pressure chambers; and a plurality of individual electrodes provided respectively on said piezo elements; wherein the cross-section of said diaphragm has a linear part provided in regions of at least one of said piezo elements, a first non-linear part provided between the linear part and one wall of at least one of said pressure chambers, and a second non-linear part provided between the linear part and another wall of said at least one pressure chamber, wherein the non-linear parts protrude toward said at least one pressure chamber and away from the linear part, wherein the first and second non-linear parts are spaced apart from each other by the wherein a shape of the non-linear parts is different from a shape of the linear part.