Quick connector

A quick connector for transporting a liquid, comprising:

• a female connector, comprising:
• a front housing having a first space and a second space therein, the first space and the second space being connected with each other, a plurality of slide rails being formed in the first space, and the front housing having a plurality of locking grooves at an opening of the first space;
• a piston cover disposed in the first space of the front housing, the outer surface of the piston cover having a plurality of slide blocks to be respectively disposed within the slide rails for allowing the piston cover to slide within the first space, the piston cover having a through hole;
• a piston structure disposed in the first space and comprising a piston base, a piston rod, and a piston head connected in sequence, the piston base being disposed at the opening of the first space within the front housing through the locking grooves, the piston head being disposed in the through hole of the piston cover;
• and
• a first spring disposed in the first space and its two ends respectively abutting against the piston cover and the piston base, and the first spring being sleeved onto the piston rod.