| 摘要 |
PROBLEM TO BE SOLVED: To form the whole liquid ejection pump of the synthetic resin in a method wherein an expandable cylinder in which a cylindrical part small in diameter, thin in wall thickness, and elastically deformable in a recessed manner is erected from an upper edge of a support cylindrical part through a thin-walled curved part, is supported in a vertically movable manner. SOLUTION: A nozzle 6 in erected when in use to make a base end opening communicate with a through hole 46, and then, a depressing head 7 is vertically moved several times to perform the initial operation, and the liquid in a container is introduced in an expandable cylinder 4 for preparation. When the head 7 is depressed, a curved part 33 and a deformed cylindrical part 34 of the expandable cylinder 4 are pressed into a support cylindrical part while elastically deformed, and the volume in the expandable cylinder 4 is reduced to pressurize the stored liquid, and the pressurized liquid passes through a stem 5 and opens a discharge valve B, and ejected from the nozzle 6. When the pressure on the head 7 is released, the stem 5 and the head 7 are elevated by the elastic restoration force of the curved part 33 and the deformed cylindrical part 34 of the expandable cylinder 4, and the pressure in the expandable cylinder 4 becomes negative, and the liquid in the container flows in by opening a suction valve A. |
