Pump container

A pump container comprising:

• a container in which liquid is kept and that has an upper opening and an inner wall;
• a shoulder member that is a cylindrical member being open on the top and bottom and having a larger inner diameter at a lower outer circumferential portion of the shoulder member than an upper inner circumferential portion of the shoulder member, that has a space formed between the upper inner circumferential portion of the shoulder member and the lower outer circumferential portion of the shoulder member, and of which an inner circumference of the lower outer circumferential portion of the shoulder member is thread-fastened to the upper opening of the container with the upper opening fitted in the space;
• a valve housing that has a cylinder part connected with a hose for suctioning an inside substance in the container at a lower portion thereof and being open on the top, an outer cylindrical part extending outward from an outer circumference of the cylinder part of the valve housing and being open on the top, an upper end insertion part fitted in the space, bending outward from the upper end of the outer cylindrical part of the valve housing, being in close contact with the inner wall of the container, and inserted in the upper inner circumferential portion of the shoulder member, and a seating part fitted in the space, bending outward from an upper end of the upper end insertion part, and seated on the top of the upper opening of the container;
• a discharge cap that is a cylindrical member coupled to a lower end of the upper inner circumferential portion of the shoulder member to move up and down and discharges the inside substance by operating a pump member installed at a center of the lower portion thereof when the discharge cap is pressed;
• and
• a cylindrical corrugated-tube spring that is made of plastic and inserted between an inner top of the discharge cap and a bottom of the outer cylindrical part of the valve housing to elastically support the discharge cap,
• wherein, after the discharge cap is fully lifted, when the discharge cap is turned and circular protrusions of locking members of the discharge cap are inserted into a groove at the lower end of the upper inner circumferential portion of the shoulder member, the discharge cap stops rotating, and
• in this state, even though the discharge cap is pressed, the discharge cap is not moved down because a bottom of locking portions of the locking members are locked to a top of the outer circumferential part of the valve housing,
• whereby elastic restoration force of the cylindrical corrugated-tube spring is not decreased because the discharge cap is locked by turning with the cylindrical corrugated-tube spring expanded.