Patent ID: 8714705
Filing Date: 2014-05-06
Classification: B41J

Abstract:
1. A liquid ejection head, comprising: a plurality of pressure chambers respectively communicating with a plurality of ejection orifices for ejecting a liquid, the plurality of pressure chambers storing the liquid to be ejected from the plurality of ejection orifices, at least a part of a wall portion forming each of the plurality of pressure chambers being formed of a piezoelectric member, the plurality of pressure chambers causing the plurality of ejection orifices to eject the liquid by deformation of the piezoelectric member; a plurality of space portions arranged in parallel to the plurality of pressure chambers at intervals with respect to the plurality of pressure chambers, some of the plurality of space portions being decompressable; a first plate having one surface provided with a plurality of first grooves and a plurality of second grooves arranged alternately with the plurality of first grooves, the first plate being formed of the piezoelectric member; and a second plate having one surface provided with a plurality of third grooves, wherein a gas permeable member is provided between the pressure chambers and the decompressable space portions so that a gas inside the pressure chambers is exhausted via the decompressable space portions, and wherein the first plate and the second plate are alternately laminated so that the first grooves and the other surface of the second plate form the pressure chambers, and the third grooves and the other surface of the first plate form the decompressable space portions.