Spray head assembly for lotion, has cylinder assembly with cylinders, and narrowed part between cylinders, where narrowed part is engaged with sealing part or cavity so as to form watertight state, and valve contacting input of one cylinder

摘要

The assembly (100) has a head (1) including a tube (11), a connection part, and an extension part (13) that is arranged around the connection part. A cylinder assembly (6) includes a set of set of cylinders (61, 62). A piston (41) is inserted in a movable manner in one cylinder. A chamber is defined inside one of the cylinders. A narrowed part (63) is arranged between the cylinders. The narrowed part is engaged with a sealing part (421) or cavity so as to form a watertight state. A valve (7) contacts an input of another cylinder.