Quick connector

A quick connector comprising:

• a connector body into which a first pipe having an annular protrusion is to be inserted;
• and
• a retainer configured to be movable from an initial position to a confirmation position relative to the connector body through push-in operation in a direction crossing an axial direction of the connector body in a state in which the first pipe is inserted to a regular position in the axial direction of the connector body, the retainer being configured to be engaged with the annular protrusion in the axial direction at the confirmation position so as to prevent the first pipe from coming off, wherein
• the retainer is movable to an insertion position opposite to the confirmation position from the initial position, and has a return force for returning to the initial position in a state in which the retainer is at the insertion position,
• the retainer includes
• a base portion,
• a pair of first leg portions extending in a push-in direction from both ends of the base portion, and
• a pair of second leg portions extending in the push-in direction from both ends of the base portion and provided independently of the pair of first leg portions, the pair of second leg portions being expandable more greatly than the pair of first leg portions, the pair of second leg portions being located on a side opposite to a side to which the first pipe is to be inserted, with respect to the pair of first leg portions,
• the pair of first leg portions have first taper surfaces, at distal end sides of the pair of first leg portions, on surfaces on the side to which the first pipe is to be inserted,
• the first taper surfaces cause the retainer to move from the initial position to the insertion position by an axial-direction pressing force from the annular protrusion, during a period until the first pipe is inserted to the regular position,
• during the period until the first pipe is inserted to the regular position, the pair of second leg portions are engaged with the connector body so that the retainer is restricted from moving from the initial position to the confirmation position, and
• in a state in which the first pipe is inserted to the regular position, when the pair of second leg portions expand due to contact with an outer circumferential surface of the annular protrusion, the engagement with the connector body is released, thus allowing the retainer to move from the initial position to the confirmation position.