Screw fastening instrument for surgical operation

Abstract

The invention discloses an instrument such as a screwdriver for fastening screws in a surgical operation. The instrument disclosed by the invention is formed by improving the existing screwdriver composed of a screwdriver handle and a screwdriver rod with a screwdriver head. The instrument disclosed by the invention has the concrete structural characteristics that a positioning boss is arranged on the screwdriver rod, a compression spring is sleeved on the boss, a sleeve barrel is sleeved on the screwdriver rod positioned at the front end of the spring, two groups of spring pieces are fixed on the inner wall of the sleeve barrel by using a fixing device, wherein the first group of spring pieces are composed of curved spring pieces, the bulge of each spring piece points to the surface of the screwdriver rod, and the sleeve barrel is fixed outside the screwdriver rod in a sliding way under the action of the bulge of each curved spring piece and the surface of the screwdriver rod; and the second group of spring pieces are composed of three beveled spring pieces which are separately arranged, wherein an included angle between the end part of each spring piece and the axial line of the screwdriver rod is 40 degrees.

Description

Screw fastening instrument for surgical operation technical field The present invention relates to a surgical instrument, in particular to a screwdriver or the like for fastening screws. The present invention is similar to the existing medical screw fastening apparatus, and also consists of a screwdriver handle and a screwdriver rod. Background technique Due to the particularity of the surgical operation, it is necessary to keep the screw on the fastening instrument during the operation to avoid falling, especially to prevent the screw from falling into the body. If a screw falls off in a similar brain operation, it will have serious consequences and bring great risks to the patient. In order to solve this problem, a magnetic screwdriver head is used in the prior art, and the screw is attracted to it by using the magnetism of the screwdriver head in use. For example, Chinese utility model patent 00262469.9 discloses a self-fixing screwdriver. On the basis of the existing...

AI Technical Summary

Problems solved by technology

But the existing technology is not suitable for screws made of non-magnetic materials, such as titanium nails or screws made of other non-ferromagnetic materials

And the disclosed screwdriver of aforementioned patent can not absorb the non-ferromagnetic screw, also because of its sleeve can not be unloaded from the screwdriver arm, therefore also exists to be inconvenient to manufacture and the deficiency that affects disinfection effect in use

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