Droplet ejection head, droplet ejection head unit, image forming apparatus, and method of mounting droplet ejection head

摘要

A problem of the present invention is to provide a liquid discharge head or the like with which the positional precision of droplet impact on a recording medium is high, and position adjustment is easy. This droplet discharge head 2, which can be attached to and detached from a holding part 3 of an image formation device, performs position adjustment by coming into contact with a position reference pin 4 provided to the holding part 3, said droplet discharge head 2 characterized by comprising: a plurality of nozzles n disposed two-dimensionally on a droplet discharge part 21 that faces the recording surface of a recording medium K, the nozzles n being disposed in a first direction D1 orthogonal to the relative movement direction of the recording medium K and the droplet discharge head 2, and a second direction D2 that intersects the first direction D1; and a position-fixing part 23 disposed so that when contact is made with the position reference pin 4, a prescribed condition is met by the first direction D1 and a perpendicular line from the center of a reference nozzle Sn to a first rotating shaft 41 for adjusting the position of the droplet discharge head 2 in a rotational direction whereby the droplet discharge head 2 rotates about a direction perpendicular to the droplet discharge part 21.