Quick Connector with Safely Locking Function

A quick connector comprising:

• a connector body, a spring, a plurality of positioning balls, a push ring, a movable sleeve, a snap ring, and a locking structure;
• wherein:
• the connector body has an interior provided with a chamber;
• the connector body has a first end provided with a mounting portion and a second end provided with an extension;
• the extension of the connector body has a peripheral face provided with an annular groove, a plurality of receiving holes and a plurality of positioning ribs;
• the receiving holes of the connector body are connected to the chamber;
• the spring is mounted on the extension of the connector body and is biased between the extension of the connector body and the push ring;
• the positioning balls are received in the receiving holes of the connector body;
• the push ring has an interior provided with a mounting hole mounted on the extension of the connector body;
• the mounting hole of the push ring has a peripheral wall provided with a plurality of positioning channels corresponding to the positioning ribs of the connector body;
• the push ring is pushed by an elastic force of the spring to press the positioning balls;
• the movable sleeve is mounted on the extension of the connector body;
• the movable sleeve has an inner wall provided with a first mounting bore, a stop flange and a second mounting bore, with the stop flange being arranged between the first mounting bore and the second mounting bore;
• the first mounting bore of the movable sleeve receives the spring and the push ring;
• the snap ring is mounted on the extension of the connector body and retained by the annular groove of the connector body;
• the snap ring is received in the second mounting bore of the movable sleeve and abuts the stop flange of the movable sleeve;
• the locking structure includes a switching ring mounted on the extension of the connector body and two opposite ratchet modules mounted in a peripheral wall of the first mounting bore of the movable sleeve;
• the switching ring of the locking structure has an inner wall provided with a plurality of positioning recesses corresponding to peripheral corners of the mounting portion of the connector body, so that the switching ring of the locking structure is limited on the connector body;
• the switching ring of the locking structure has an outer wall provided with two opposite guide rails;
• each of the two opposite ratchet modules of the locking structure is provided with a stop zone and a free zone;
• the stop zone of each of the two opposite ratchet modules is provided a toothed braking portion;
• and
• the free zone of each of the two opposite ratchet modules is connected to the stop zone and has an elongate shape.