Patent ID: 7845771
Filing Date: 2010-12-07
Classification: B41J

Abstract:
1. A droplet jet head comprising: a base member which holds a plurality of piezoelectric elements; a vibration plate which is provided on the base member and vibrated by the plurality of piezoelectric elements; a liquid chamber plate which is provided on the vibration plate, and which forms wall surfaces of a plurality of liquid chambers containing liquid, the capacities of the liquid chambers being changed by the vibration plate; a nozzle plate which is provided on the liquid chamber plate, and which has a plurality of nozzles communicating with the plurality of liquid chambers, respectively; a holder plate which is provided on the liquid chamber plate in a manner of covering the nozzle plate, and which has an opening exposing the plurality of nozzles; a buffer member which is provided between the holder plate and the nozzle plate; and a plurality of screws which fasten the base member, the vibration plate, the liquid chamber plate and the holder plate, wherein the nozzle plate is formed such that an area where the nozzles are formed protrudes from the opening in a state where the nozzle plate is joined with the holder plate.