Connecting device and locking mechanism thereof

Abstract

The invention discloses a connecting device and a locking mechanism thereof. The locking mechanism comprises a locking ring, a locking head, a connection shaft and a locking part, wherein the lockingring is provided with a sleeving through hole, a connector protruding out of the outer side wall of the sleeving through hole, and a gap which penetrates though the side wall of the connector and theside wall of the sleeving through hole in the axis direction of the sleeving through hole; a cooperation face and a clamping groove which is formed in the side wall of the cooperation face are arranged at one end of the locking head, the outer side wall of the clamping groove is matched with that of the sleeving through hole, and a connection through hole is formed in the other end of the lockinghead; a connection hole is formed in one end face of the connection shaft, the connector penetrates through the connection through hole to rotatably sleeve the inner side wall of the connection hole,and the other end of the connector movably sleeves the outer side wall of the connection hole through the connection through hole; an extensible structure is arranged between the locking part and theconnection shaft, and the locking part can move relative to the connection shaft. By means of the connecting device and the locking mechanism thereof, pedicle screws of different spacing and differentfixed positions can be supported and pressurized, the supporting and pressurizing track is controllable, and a surgical operation is facilitated.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a connector and a locking mechanism thereof. Background technique [0002] After years of clinical research, the spinal rod internal fixation system has become a relatively mature medical device for minimally invasive spinal surgery, which is widely used in the treatment of spinal injuries and related spinal diseases. Minimally invasive surgery has attracted more and more attention from doctors and patients because it can reduce intraoperative tissue damage and bleeding, reduce patients' surgical pain, and shorten wound healing time. [0003] The current minimally invasive surgery process for the spine: Insert the pedicle screw → insert the connecting rod into the end cap of the pedicle screw → adjust the distance between the pedicle screws → screw in the locking screw to lock the connecting rod and the pedicle screw , to complete the spacing fixation between the ped...

AI Technical Summary

Problems solved by technology

[0004] In clinical minimally invasive spinal surgery, spreader forceps or compression forceps are used to adjust the distance between adjacent pedicle screws. There are problems in this traditional adjustment method: 1) The distance between the screw seats varies depending on the individual and the surgical situation. Different, the traditional adjustment method has poor adjustability to the distance between the nail seats, and the three-dimensional space of the nail seats is not even, and many times the pincer head cannot be embedded into the nail seat; 2) set the clamping device on the pincer head (such as Clamping sleeve), the sleeve is clamped by the clamping device, and then the sleeve is stretched and pressurized. However, during the stretching or pressurization process of the jaws, its trajectory is arc-shaped, which cannot meet the requirements for the vertebral body. Parallel distraction and pressurization effects, and its arc-shaped distraction trajectory is fixed, which cannot meet the needs of actual clinical operations

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