Patent ID: 11884453
Assignee: ZIPPIAN CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A child safety zipper comprising:
a first zipper strip having
a first band unit, wherein at least a part of the first band unit is attached to an inside wall on one side of a plastic bag,
a first connection unit that extends from the first band unit,
a first base unit that is expanded from the first connection unit and is formed to overlap the first band unit in parallel with each other,
a pair of first hook units which projects in parallel with each other from the first base unit, and
a first support unit that is separated from the first hook units and projects from the first base unit; and

a second zipper strip that is coupled to the first zipper strip to seal the plastic bag, the second zipper strip having
a second band unit that is formed in parallel with the first band unit, wherein at least a part of the second band unit is attached to an inside wall on the other side of the plastic bag,
a second connection unit that extends from the second band unit,
a second base unit that is expanded from the second connection unit and is formed to overlap the first base unit in parallel with each other,
a pair of second hook units which projects in parallel with each other from the second base unit and is hooked to the pair of first hook units, respectively, and
a second support unit that is separated from the second hook units and projects from the second base unit,

wherein the first connection unit and the second connection unit are each formed on one side from each center of the first band unit and the second band unit,
wherein the first support unit and the second support unit are formed to extend in a straight line from the first connection unit and the second connection unit, respectively,
wherein an upper end of the first band unit is close to a top edge of the plastic bag and detached from the inside wall on the one side of the plastic bag,
wherein an upper end of the second band unit is close to the top edge of the plastic bag and detached from the inside wall on the other side of the plastic bag,
wherein the first base unit and the second base unit are formed to be thicker than the first band unit and the second band unit, respectively,
wherein the first hook units and the second hook units are continuously curved,
wherein the first hook units and the second hook units have respective columns which extend from the first base unit and the second base unit and respective hooks which are curved from respective edge portions of the columns toward one side,
wherein the columns are formed to have respective central axes inclined toward the hooks, respectively,
wherein the columns are each formed into a taper shape which decreases in width as being away from the first base unit or the second base unit and are each formed to have respective sloping surfaces on an opposite side of the hooks, so as to allow the opening only when the plastic bag is held and then twisted and stretched in the length direction of the first and second zipper strips, and
wherein when the plastic bag is held and twisted, the first zipper strip and the second zipper strip can be uncoupled from each other as the first hook units and the second hook units slide over the sloping surfaces in opposite directions from each other, respectively.