To increase discharge efficiency, impact precision and printing speed by displacing the free end of a movable member which is faced to a substrate and arranged in the specific direction by bubbles generated through gas and growing bubbles in the direction of discharge and discharging liquid.
An orifice plate 14 having a liquid flow path 3b between the same and a substrate 1 is provided so as to face parallel to the exothermic face of a heating element 2. A discharge port 11 is arranged in the orifice plate 14. A movable part 6 having a plate cantilever beam shape is provided which opposes to the heating element 2 and covers it. One end 5a of the movable part 6 is stationarily supported on a supporting member 5b. The free end 6a of the movable part 6 is opposed to a wall member 15a through a slit 8 being in a substantially closed state. When heat is generated from the exothermic face of the heating element 2 and bubbles are generated in the downside region B, the free end 6a is moved to the upper region A by pressure attending growth of bubbles or growing bubbles thenselves while keeping a base part 6b as a supporting point. Liquid is discharged from the discharge port 11. Therefore, liquid is discharged with high discharge efficiency, high discharge force and high impact precision and high-speed recording and high picture quality recording are enabled.
NAKADA YOSHIE
OKAZAKI TAKESHI
TAKAIDE FUMI
KUDO KIYOMITSU
KIMURA MAKIKO
