DROPLET DISCHARGE HEAD AND IMAGE FORMATION APPARATUS

PROBLEM TO BE SOLVED: To provide a droplet discharge head which can suppress shortage in a discharge amount of droplets due to recovery of ink in a pressure generation chamber 12 to a circulation liquid chamber.SOLUTION: A droplet discharge head comprises: a plurality of pressure generation chambers 12 which individually communicate with a plurality of nozzles 13; a supply liquid chamber 10 which stores ink to be supplied to the pressure generation chambers; a plurality of supply paths 11 which make the pressure generation chambers 12 communicate with the supply liquid chamber 10; a circulation liquid chamber 15 which receives ink recovered from each of the plurality of pressure generation chambers 12; and a plurality of circulation paths 14 which make the plurality of pressure generation chambers 12 communicate with the circulation liquid chamber 15. Each of the plurality of circulation paths 14 is provided with a small diameter part 14b whose diameter becomes small in a partial region in the whole region in the longitudinal direction.SELECTED DRAWING: Figure 4 【課題】圧力発生室１２内のインクを循環液室に回収することに起因する液滴の吐出量の不足を抑えることができる液滴吐出ヘッドを提供する。【解決手段】複数のノズル１３に個別に通じる複数の圧力発生室１２と、それらに供給するためのインクを収容する供給液室１０と、それら圧力発生室１２と供給液室１０とを通じさせる複数の供給路１１と、複数の圧力発生室１２のそれぞれから回収したインクを受け入れる循環液室１５と、複数の圧力発生室１２と循環液室１５とを連通させる複数の循環路１４とを有する液滴吐出ヘッドにおいて、複数の循環路１４のそれぞれに、長さ方向の全域における一部領域で径が細くなっている小径部１４ｂを設けた。【選択図】図４