An orthopedic external fixator

Abstract

The invention provides an external fixator for the orthopaedics department. The external fixator comprises a support rod, a plurality of groups of nail bar clamping mechanisms, and nails, wherein each group of nail bar clamping mechanism is composed of a U-shaped clamp I, a bulb handle and a bolt, a bulb is arranged on one end of the bulb handle, a neck is arranged in the middle of the bulb handle, a taper threaded hole is formed in the other end of the bulb handle and is used for mounting the nail, ball sockets are arranged on the inner sides of the end parts of two side walls of the U-shaped clamps I, the bulbs are placed in the ball sockets and are provided with inner holes, each inner hole is composed of two taper holes, small openings of the two taper holes are butted, large openings of the two taper holes face outwards, the U-shaped clamps I have elasticity, the bottoms of the U-shaped clamps I are provided with semicircular thin walls, two bosses extend inward along the inner arcs of the semicircular thin walls for clasping the support rod, one side of each ball socket is provided with a threaded hole, the other side of each ball socket is provided with an unthreaded hole, the bolt sequentially passes through the corresponding unthreaded hole and inner hole to be screwed to the corresponding threaded hole, in the screwing process of the bolt, the semicircular thin walls firstly deform for clamping the supporting rod, and then the two side walls of the U-shaped clamps I deform to clamp the bulb, so that the operation is simple and convenient, the clamping force is large, and locking is relatively reliable.

Description

technical field [0001] The invention relates to the field of orthopedic medical instruments, in particular to an orthopedic external fixator. Background technique [0002] Existing orthopaedic external fixator, such as the unilateral universal orthopaedic external fixator disclosed in Patent No. 98221136.8, its basic structure includes a support rod, a ball handle and a clamping block for connecting the support rod and the ball handle, and a fixed Bone nail at the end of the ball shank. Each two clamping blocks is a group, one end of each clamping block is clamped on the support rod, the other end is clamped on the ball head of the ball shank, and the two clamping blocks are fastened by bolt connection in the middle. During the operation, the bones on both sides of the fracture site are fixed with bone nails and the ball head handle, and then the position of each clamp on the support rod is properly adjusted and the ball head handle and the support rod are fastened, so that...

AI Technical Summary

Problems solved by technology

Although the orthopedic external fixator with the above structure is more convenient to use, the clamping blocks are divided into two groups, the assembly is more complicated and the clamping force on the ball head is not strong enough

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