LIQUID INJECTION DEVICE

• Main Author: MIYAJIMA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 21.06.2018
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

PROBLEM TO BE SOLVED: To provide a liquid injection device which can increase versatility of a head unit and reduce costs and inhibits an increase in pressure loss and accumulation of air bubbles.SOLUTION: A liquid injection device includes: a back pressure control unit 20 including a back pressure control element 30 having a first opening 101a, a second opening 103a, a first liquid passage 100 communicating with the first opening 101a and the second opening 103a, and a valve body 38 which controls flow of liquid in the first liquid passage 100, and a housing 40 formed with a liquid introduction port 424, which houses the back pressure control element 30 and communicates with the first opening 101a, and a discharge passage 110 communicating with the second opening 103a; a third opening connected with the discharge passage 110 of the back pressure control unit 20; a second liquid passage communicating with the third opening; and a first filter 84 disposed in the second liquid passage.SELECTED DRAWING: Figure 2 【課題】ヘッドユニットの汎用性を高くして、コストを低減することができると共に圧力損失の増大や気泡の滞留を抑制した液体噴射装置を提供する。【解決手段】第１開口１０１ａと、第２開口１０３ａと、第１開口１０１ａと第２開口１０３ａとに連通する第１の液体流路１００と、第１の液体流路１００中の液体の流れを制御する弁体３８と、を有する背圧制御素子３０と、背圧制御素子３０を収納し、第１開口１０１ａに連通する液体導入口４２４と第２開口１０３ａに連通する排出路１１０とが形成された筐体４０と、を備える背圧制御ユニット２０と、背圧制御ユニット２０の排出路１１０と連結する第３開口と、第３開口に連通する第２の液体流路と、第２の液体流路内に配置される第１のフィルター８４、を備える。【選択図】図２