A quick connector with a compressive and rotational locking and unlocking mechanism, applicable to a medical device and comprising:
- a cylindrical socket having a first connector body disposed therein, wherein at least one plug-connection trackway is formed on a peripheral surface of a rear segment of the cylindrical socket along a circumferential direction, extends obliquely in a direction toward a front segment of the cylindrical socket, and has an engaging notch at a terminal end of the plug-connection trackway and extending in a direction toward the rear segment of the cylindrical socket;
- a cylindrical plug comprising a limiting ring, and having a second connector body disposed therein and a first limiting wall protruding from an outer peripheral surface of the cylindrical plug;
- a rotatable collar for being movably assembled on the cylindrical plug, having:
- a through hole formed at a center of the rotatable collar;
- at least one engaging protrusion protrudingly arranged on an inner peripheral surface of a front segment of the rotatable collar along the circumferential direction;
- and
- a second limiting wall having a diameter smaller than a diameter of the limiting ring and protruding from an inner peripheral surface of a rear segment of the rotatable collar, wherein when the rotatable collar is assembled to the cylindrical plug, the second limiting wall corresponds to the first limiting wall, and is located at a position rearward of the first limiting wall;
- and
- an undulant resilient piece capable of being located between the first limiting wall and the second limiting wall, and abutting against each of the first limiting wall and the second limiting wall,
- wherein when the rear segment of the cylindrical socket enters into the through hole, front segments of the first connector body and the second connector body engage with each other so that the first connector body and the second connector body form a first combined state, and the at least one engaging protrusion enters into the corresponding plug-connection trackway and, with the rotation of the rotatable collar, moves along the plug-connection trackway until reaching the terminal end of the plug-connection trackway to force the cylindrical socket to move in a direction toward the cylindrical plug without the second limiting wall moving toward the limiting ring in the moving direction of the cylindrical socket, so as to form a second combined state of the first connector body and the second connector body, the second combined state being the front segments of the first connector body and the second connector body being engaged with each other with a degree of tightness larger than that of the first combined state to establish an electrical connection therebetween and the second limiting wall being located between the first limiting wall and the limiting ring without contacting the limiting ring;
- and
- wherein when the rotatable collar is no longer driven to rotate, a force acting from the undulant resilient piece urges the first limiting wall to move along a direction away from the second limiting wall without the second limiting wall moving toward the limiting ring in the moving direction of the first limiting wall, so that the at least one engaging protrusion is lodged in position in the engaging notch, and an inner sidewall of the engaging notch compresses against an outer peripheral surface of the at least one engaging protrusion to form a locked state.