Patent WO-2020050452-A1 (WO)
Title: Airless cosmetic container
Inventor: LEE KYUNG CHANG
IPC: B65D43/16
Filed: 2018-10-19
Abstract: The present invention relates to an airless cosmetic container comprising: a lower container (10) having an opened lower part; an inner container (20) which is a cylindrical member inserted through the upper opening of the lower container (10) and having a closed lower part, and which has an upper outer flange (21) mounted on and assembled to the upper end of the lower container (10); a container cover (30) which is a cylindrical member for covering the upper opening of the inner container (20), and of which a lower protruding groove (31) protruding downwards from the center thereof is positioned in a cylinder (22) protruding from the center of the inner container (20) and an outer end (32) is coupled to two vertical protruding rods (23) protruding toward the upper part of the upper outer flange (21) of the inner container (20); a cylindrical spring (40) coupled in the container cover (30); a disc-shaped upper lid (50), having a recessed upper surface, coupled to the upper part of the cylindrical spring (40); a disc-shaped lower lid (60), which is a member coupled to the lower surface of the center of the upper lid (50), has a discharge hole (61) formed in the center thereof, and has a fastening cylinder (62) formed at the lower part of the discharge hole (61); a pump body (70) coupled to the fastening cylinder (62) of the lower lid (60) and inserted into the lower protruding groove (31) of the container cover (30); an exhaustion piston (80) coming in close contact with the inner periphery of the inner container (20) and the outer periphery of the cylinder (22) protruding in the center thereof, so as to rise as cosmetic contents are used; and an upper case (100) which is a cylindrical member for covering the upper side of the lower container (10), and of which one side is hinge-coupled to one side wall of the lower container (10) and the other side is hooked and coupled to an opening/closing button (90). The present invention has effects of: preventing external air from flowing into an upper cylinder since the inner diameter of the discharge hole is formed to be smaller than the inner diameter of the fastening cylinder of the lower lid such that, when a piston support and the lower lid are coupled, the upper end surface of a center hole of the piston support comes in close contact with, that is, overlaps with the lower surface of the discharge hole in the fastening cylinder of the lower lid, so as to reinforce fastening force; and enabling cosmetic contents to be fully exhausted and used up without waste since a coupling protrusion is formed on the outer periphery of the outer vertical protruding rod from among the two vertical protruding rods of the inner container such that the outer side of the upper part of the container cover is firmly coupled thereto, and a gap, that is, an evacuation space is formed between the inner periphery of the inner container and the outer periphery of the lower part of the container cover such that the upper end of the exhaustion piston raised along the inner periphery of the inner container is inserted therein, and thus the upper end of the exhaustion piston is inserted into the evacuation space.