Patent ID: 8371620

Claim:
A quick connector, being adapted for a male adapter to connect thereto, the quick connector comprising: a female adapter, having a joint portion at one end thereof, the female adapter being formed with an axial hole, the axial hole being adapted for the male adapter inserting therein, the joint portion having an outer contour and an inner contour, the joint portion being formed with an opening, the opening extending radially and passing through the outer contour and the inner contour so that the opening is communicated with the axial hole; wherein, the inner contour of the joint portion has at least a limiting groove; and at least a retainer, being pivotally disposed on the joint portion, the retainer comprising an inner arm and an outer arm, the outer arm comprising a hook portion; wherein, the retainer is capable of pivoting about an axis with respect to the joint portion, the retainer pivots between a clamping position and a spreading position; when the retainer is located in the clamping position, the retainer is located in the opening of the joint portion, the inner arm engaging the male adapter, the hook portion hooking in the limiting groove; when the hook portion is away from the limiting groove, the retainer being capable of pivoting to the spreading position so that the inner arm is separated from the male adapter; wherein the inner arm is formed with a first arc section and a second arc section, the first arc section has a first concave surface at a side of the first arc section which is away from the outer arm, the second arc section has a second concave surface at a side of the second arc section which is away from the outer arm, the first and the second concave surfaces are eccentric so that a protrusive portion is formed between the first and the second arc sections, the protrusive portion extends away from the outer arm, when the inner arm engages the male adapter, the first concave surface leans against an outer surface of the male adapter tightly.