LIQUID JET HEAD AND LIQUID JET APPARATUS

• Main Authors: OKUI HIROAKI, UCHIDA KAZUMI, WATANABE EIICHIRO, KANEGAE TAKAKIMI
• Format: Patent
• Language: English; Japanese
• Published: 12.08.2022
• 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

To avoid a high temperature of a drive circuit 42.SOLUTION: A liquid jet head 10 includes: a piezoelectric element 30 that is driven to jet liquid in a jetting direction Z1 from a plurality of nozzles N;individual supply channels 51A that supply liquid to respective nozzles N;individual recovery channels 51B that recover liquid from the respective nozzles N; a pressure chamber 57A communicating with each of the plurality of nozzles N; a vibration plate 26 that defines a wall surface of the plurality of pressure chambers 57A and is displaced by driving of the piezoelectric element 30; a flexible substrate 40 having a drive circuit 42 electrically connected to the piezoelectric element 30;and a heat radiation member 81 that is in contact with a surface 41b on a side opposite to a surface provided with the drive circuit 42 of the flexible substrate 40 or in contact with the drive circuit 42 and conducts heat of the drive circuit 42 to the vibration plate 26.The heat radiation member 81 is disposed closer to the individual supply channels 51A than the individual recovery channels 51B.SELECTED DRAWING: Figure 4 【課題】駆動回路４２が高温となることを回避する。【解決手段】液体噴射ヘッド１０は、複数のノズルＮから噴射方向Ｚ１へ液体を噴射させるために駆動する圧電素子３０と、ノズルＮに液体を供給する個別供給流路５１Ａと、ノズルＮから液体を回収する個別回収流路５１Ｂと、複数のノズルＮのそれぞれと連通する圧力室５７Ａと、複数の圧力室５７Ａの壁面を画定し、圧電素子３０の駆動により変位する振動板２６と、圧電素子３０と電気的に接続された駆動回路４２を有するフレキシブル基板４０と、フレキシブル基板４０の駆動回路４２が設けられた面とは反対側の面４１ｂ、又は駆動回路４２に接触し、駆動回路４２の熱を振動板２６へ伝導させる放熱部材８１と、備え、放熱部材８１は、個別回収流路５１Ｂよりも個別供給流路５１Ａの近くに配置されている。【選択図】図４