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1. (WO2018220671) LIQUID EJECTION PUMP

Pub. No.:    WO/2018/220671    International Application No.:    PCT/JP2017/019896
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 30 01:59:59 CEST 2017
IPC: B65D 83/00
Applicants: SHISEIDO COMPANY, LTD.
株式会社資生堂
Inventors: SATO, Teruo
佐藤 照雄
Title: LIQUID EJECTION PUMP
Abstract:
A liquid ejection pump (1) comprises a cylinder (3) that stores content sucked up from inside a container, a stem (5) that stands upright above the cylinder and can move vertically in a state of being urged upward by a coil spring (4), a piston (6) that is coupled to the stem and is provided so as to be capable of freely sliding vertically inside the cylinder, and a push down head (8) that is fitted to the upper end of the stem and in which a nozzle (7) is formed that communicates with the inside of the stem, wherein: the coil spring (4) is a coil spring having a non-linear characteristic; the push down head can be lightly pushed down in an operation initial period from a static state when the liquid ejection pump is to be used until when the push down head begins to move; and after ejection, the push down head returns with certainty to its original position.