Liquid drop ejecting head, image forming device, and method of manufacturing liquid drop ejecting head

摘要

In a liquid drop ejecting head including a diaphragm, a channel member, and a nozzle plate which are laminated in this order, interface surfaces of the channel member and 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. 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 pressurizing liquid chambers of the channel member. A side wall of the channel member disposed to contact or located in a vicinity of the filter part, 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.

主权项

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.