Clip-cartridge assembly and clip applicator

A clip applicator, comprising a clip-cartridge assembly, a firing device, a driving device, and a control circuit, wherein the clip-cartridge assembly comprises:

• a clip-cartridge, a clip delivery device, and a clip jaw provided on a side of the clip-cartridge, wherein
• the clip-cartridge comprises an accommodation cavity for placing a ligation clip and the clip delivery device;
• the clip delivery device comprises an elastic member and a clip pushing block for pushing the ligation clip within the accommodation cavity to move;
• and
• if a distal end of the clip jaw is closed, the elastic member, by an elastic force of the elastic member, drives the clip pushing block to move in a movement direction toward the clip jaw from a proximal end of the clip jaw;
• wherein the elastic member is a first spring, and the first spring and the clip jaw are respectively provided on two opposite sides of the clip pushing block;
• the clip-cartridge assembly further comprises a brake member, the brake member comprises a limiter and a second spring, the second spring is connected to the limiter, the limiter is provided between the clip jaw and the clip-cartridge, the limiter is movable in the accommodation cavity in a direction that is perpendicular to a movement direction of the ligation clip in the accommodation cavity;
• meantime, if the distal end of the clip jaw is closed, an elastic force of the second spring drives at least a part of the limiter to exit from the accommodation cavity;
• and
• if the distal end of the clip jaw is opened, the proximal end of the clip jaw pushes the limiter to enter into the accommodation cavity to prevent a next ligation clip from entering into the clip jaw from the proximal end of the clip jaw;
• the firing device comprises a pushing rod, two ends of the pushing rod are connected to the driving device and the clip-cartridge, respectively, the pushing rod is provided on a side of the clip-cartridge away from the clip jaw;
• and
• the control circuit is connected to the driving device and configured to control the driving device to drive the pushing rod to reciprocate between the clip-cartridge and the driving device, so as to drive the clip-cartridge to move and then control opening or closing of the distal end of the clip jaw.