A self-sustaining locking bolt driver

Abstract

The invention provides a self-sustaining locking bolt screwdriver, comprising a screwdriver rod and a fixing rubber, and the fixing rubber is made of polymer material. The distal end of the driver rod is provided with a fixed hole, including a counterbore and a through hole. The counterbore is located in the center of the distal end surface of the driver rod, and the through hole is centered on the counterbore and is distributed on the radial section of the driver rod; it is filled by the encapsulation process. The countersunk hole and the through hole form a fixed lagging with a specific structure, and protrude relative to the quincunx outer contour structure of the screwdriver; when the screwdriver is fitted with the locking bolt, the fixed lagging fills the gap between the quincunx structure of the screwdriver rod and the locking bolt. The present invention forms a specific-shaped rubber-encapsulated structure at the locking part where the screwdriver rod and the locking bolt cooperate, and realizes self-sustaining through interference fit. The head of the screwdriver rod has a strong anti-torsion ability and is easy to use Fast, practical, and widely applicable.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a self-sustaining locking bolt driver. Background technique [0002] In orthopedic surgery, such as spinal internal fixation surgery, corresponding vertebral body screws, connecting rods, etc. need to be implanted, and a screwdriver is usually required to hold and lock and fix the locking bolts. In the current surgical operation, a screwdriver is firstly required to hold the locking bolt and screw it into the corresponding position of the vertebral body nail in advance. The head of the screwdriver is generally slotted, and elastic deformation occurs when it is fitted with the locking bolt, so as to realize the tightening of the locking bolt. Self-sustaining, after the corresponding surgical operation is completed, use another screwdriver that can withstand a certain torque to screw in the locking bolt and then completely lock it. It can be seen from the above that two screwdri...

AI Technical Summary

Problems solved by technology

This design has the following defects: (1) The structure is complex, the installation is difficult, and the precision required for use is high; (2) The head of the instrument has a slotted structure, which greatly reduces the strength and is prone to risks such as breakage during use; (3) Due to the small structure and small size of the locking bolt, the device has many components, poor practicability, and narrow application range

This design has the following defects: (1) The overall structure of the device is complex, with many accessories, and it is difficult to install; (2) The interior of the device is hollow, which will lead to weakening of the overall structural strength of the device, which is more risky during use; (3) The device is self-supporting Part of the operation is complicated, and it does not have strong practicability in surgical operations

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