JP2015016648A5 - - Google Patents

Claims (7)

A plurality of nozzle holes for discharging droplets, a plurality of pressurized liquid chambers communicating with the plurality of nozzle holes, a diaphragm forming one wall surface of the pressurized liquid chamber, and the vibration plate through the diaphragm Actuator means for generating energy for boosting the liquid in the pressurized liquid chamber, a common liquid chamber for supplying the liquid to the plurality of pressurized liquid chambers, and a flow path between the common liquid chamber and the pressurized liquid chamber In a droplet discharge head provided with a filter unit having a plurality of supply holes arranged in
A liquid droplet ejection head, wherein the fluid resistance of the filter section monotonously changes with respect to the flow direction of the liquid that has passed through the filter section toward the pressurized liquid chamber.   2. The liquid droplet ejection head according to claim 1, wherein the fluid resistance in the upstream portion of the filter portion is smaller than the fluid resistance in the downstream portion with respect to the flow direction of the liquid toward the pressurized liquid chamber. Discharge head.   3. The liquid droplet ejection head according to claim 1, wherein the fluid resistance of the filter unit is changed by changing a cross-sectional area of the plurality of supply holes of the filter unit.   3. The droplet discharge head according to claim 1, wherein the fluid resistance of the filter unit is changed by changing an arrangement density of the plurality of supply holes of the filter unit.   4. The droplet discharge head according to claim 3, wherein the plurality of supply holes of the filter section have an elliptical cross section, and the length of the major axis of the elliptical shape is changed. . In any of the liquid droplet ejection head according to claim 1 to 5, the upper Kia actuator means is a piezoelectric element formed on the diaphragm, the filter unit is inductively coupled plasma to said diaphragm (Inductively Coupled Plasmas: ICP) A droplet discharge head, which is a diaphragm filter in which a plurality of supply holes are formed by dry etching. In an image forming apparatus for forming an image by adhering droplets ejected by droplet ejecting means to the medium while conveying the medium,
An image forming apparatus comprising the droplet discharge head according to claim 1 as the droplet discharge unit.