Spring for pumping-type container and pumping-type container including same

A pumping-type container comprising:

• a container part in which liquid contents are stored;
• a button installed above the container part;
• and
• a spring comprising an upper support plate having a circular upper through-hole extending therethrough, a lower support plate which has a circular lower through-hole and is disposed below the upper support plate such that the lower through-hole is aligned with the upper through-hole, a first helical part having a circular helical shape and installed between the upper support plate and the lower support plate such that the upper end thereof is fixed to the bottom surface of the upper support plate and the lower end thereof is fixed to the upper surface of the lower support plate, and a second helical part having a circular helical shape extending in a direction identical to that of the first helical part and installed between the upper support plate and the lower support plate such that the upper end thereof is fixed at a point of the bottom surface of the upper support plate, which is linearly symmetric to a point at which the upper end of the first helical part is fixed, with reference to the center line of the upper through-hole, and the lower end thereof is fixed at a point of the upper surface of the lower support plate, which is linearly symmetric to a point at which the lower end of the first helical part is fixed, with reference to the center line of the lower through-hole,
• wherein the first helical part has a helical trajectory, the rotation angle of which is (180+360×N) degrees (N is a positive integer), is connected to the upper surface of the second helical part through the bottom surface of a point at which a rotation angle of the helical trajectory from the upper end thereof is (360×M−180) degrees (M is a positive integer ≤N), is connected to the bottom surface of the second helical part through the upper surface of a point at which a rotation angle of the helical trajectory from the upper end is (360×M) degrees, and is configured such that a section descending from a first helical lower-surface connection point to a first helical upper-surface connection point has a lead angle smaller than that of the other portion of the first helical part, the first helical lower-surface connection point being a point connected to the upper surface of the second helical part through the bottom surface of the first helical part, and the first helical upper-surface connection point being a point connected to the bottom surface of the second helical part through the upper surface of the first helical part;
• and
• the second helical part has a helical trajectory, the rotation angle of which is (180+360×N) degrees, is connected to the upper surface of the first helical part through the bottom surface of a point at which a rotation angle of the helical trajectory from the upper end thereof is (360×M−180) degrees, is connected to the bottom surface of the first helical part through the upper surface of a point at which a rotation angle of the helical trajectory from the upper end is (360×M) degrees, and is configured such that a section descending from a second helical lower-surface connection point to a second helical upper-surface connection point has a lead angle smaller than that of the other portion of the second helical part, the second helical lower-surface connection point being a point connected to the upper surface of the first helical part through the bottom surface of the second helical part, and the second helical upper-surface connection point being a point connected to the bottom surface of the first helical part through the upper surface of the second helical part.