Patent ID: 8801153
Filing Date: 2014-08-12
Classification: B41J,Y10T

Abstract:
1. A liquid drop ejecting head comprising: a nozzle plate that forms nozzles to eject liquid drops; a channel member that forms pressurizing liquid chambers which communicate with the nozzles, respectively; and a diaphragm that forms a bottom surface of each of the pressurizing liquid chambers, the diaphragm, the channel member and the nozzle plate being laminated on top of each other, wherein: an interface surface of a side wall of the channel member and an interface surface of the diaphragm are bonded by an adhesive; the diaphragm is formed to have a laminated structure in which the number of lamination layers is varied at different locations of the diaphragm; the diaphragm includes an opening and a filter part, the filter part having plural filtering holes formed in the opening for supplying a liquid to the pressurizing liquid chambers; the side wall of the channel member is disposed to contact or located in a vicinity of the filter part, the side wall and a thick-walled portion containing the largest number of lamination layers in the diaphragm do not overlap with each other in a laminating direction; and a distance between the thick-walled portion and the filter part is greater than a distance between the side wall of the channel member and the filter part in a direction perpendicular to a nozzle arraying direction in which the nozzles are arrayed.