Patent ID: 7052118
Filing Date: 2006-05-30
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a plurality of liquid ejection units, each comprising: a casing body, having a first pair of faces extending in a first direction, and a second pair of faces connecting the first pair of faces and extending obliquely relative to the first direction; and a plurality of nozzles, from which liquid droplets are ejected, the nozzles arranged in the first direction to form a first nozzle array and a second nozzle array, wherein: the liquid ejection units are arranged such that one of the second pair of faces in one of the liquid ejection units and one of the second pair of faces in another one of the liquid ejection units are confronted with each other, so that the liquid ejection units are overlapped in both of the first direction and a second direction which is perpendicular to the first direction; the first nozzle array in one of the liquid ejection units and the first nozzle array in another one of the liquid ejection units constitute a first nozzle group, which is continuous as viewed from the second direction, for ejecting a first kind of liquid; and the second nozzle array in one of the liquid ejection units and the second nozzle array in another one of the liquid ejection units constitute a second nozzle group, which is continuous as viewed from the second direction, for ejecting a second kind of liquid, wherein: the casing body is formed with a chamber for accommodating a plurality of vibrator units which extends in a third direction which is orthogonal to the first direction and the second direction; each of the vibrator units comprises: a fixation board, fixed on an inner face of the chamber; and a plurality of piezoelectric vibrators, arranged on the fixation board in the first direction to cause pressure fluctuation in liquid contained in pressure generation chambers which are respectively communicated with the nozzles in one of the first nozzle array and the second nozzle array; and the second pair of faces extend in the third direction.