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Lock pin type center nail device

A locking pin-type, hollow nail technology, applied in the direction of internal fixator, internal bone synthesis, fixator, etc., can solve the problems of easy deformation, bending or broken needle, failure of internal fixation, etc. The operation is convenient and fast, and the effect of increasing the strength of the hollow nail

Active Publication Date: 2015-08-26
DABO MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fixing nail device adopting this method of use has only hollow nails in essence, so the fixing nail device has the following disadvantages: 1. Poor strength, easy to bend or break the needle, and easily lead to internal fixation failure; 2. Hollow nails Nails are easily deformed, which can easily lead to internal fixation failure

Method used

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  • Lock pin type center nail device
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  • Lock pin type center nail device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, please refer to Figure 1 to Figure 4 , Lock pin type central nail device, which includes a hollow nail 10 and a central nail 20.

[0032] The outer rotating surface of the hollow nail 10 has a first external thread segment 11 . In this embodiment, the first external thread segment 11 is provided at the front end of the hollow nail 10 . The hollow nail 10 is provided with a central hole 12 penetrating in the axial direction, the rear end of the central hole 12 is provided with a reaming hole 12a, the inner rotating surface of the central hole 12 has an internal thread section 13, and the internal thread section 13 It is provided near the reaming hole 12a.

[0033] The outer turning surface of the central nail 20 has a second external thread segment 21 , and the second external thread segment 21 is adapted to the internal thread segment 13 of the central hole 12 . A connecting head 22 is provided at the rear end of the central nail 20, and the connecting hea...

Embodiment 2

[0036] Embodiment 2 is different from the previous preferred embodiment in that: please refer to Figure 5 to Figure 8 , the inner revolving surface of the central hole 12 of the hollow nail 10 is recessed to form an annular groove 14, the front end surface of the annular groove 14 is set as a tapered surface with a small front and a large rear, and the rear end surface of the annular groove 14 is set as an annular circular end surface . The rear end of the central hole 12 of the hollow nail 10 is provided with a reaming hole 12a, and the front end surface of the reaming hole 12a is a tapered surface with a small front and a large rear.

[0037] An annular flange 23 that is adapted to the annular groove 14 is protruded from the outer rotating surface of the central nail 20 , the front end surface of the annular flange 23 is set as a tapered surface with a small front and a large rear, and the rear end surface of the annular flange 23 is set as an annular rounded end face. Th...

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PUM

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Abstract

The invention discloses a locking pin type central nail device, which comprises a hollow nail and a central nail, wherein the outer rotary surface of the hollow nail is provided with a first external thread section; the hollow nail is provided with an axially penetrating central hole; and the central nail is adaptively assembled in the central hole of the hollow nail, so that the hollow nail and the central nail are assembled together. The locking pin type central nail device has the advantages that after the hollow nail is arranged in the central position, the central nail is locked in the hollow nail, the strength of the hollow nail is increased, and the hollow nail is prevented from being bent or broken; after being locked in the hollow nail, the central nail can be automatically locked to be prevented from being withdrawn; according to the central nail, when the strength of the hollow nail is improved, the function of the hollow nail is not influenced; and due to the inserted pin design, the locking pin type central nail device is convenient to operate.

Description

technical field [0001] The present invention relates to a locking pin type center pin device. Background technique [0002] At present, in the treatment of fractures or dislocations in orthopaedics, the methods of using cannulated nails include: firstly driving a nail into the bone; sleeving the cannulated nail at the nail, and then driving the hollow nail into the bone along the nail; then Remove the staples. The fixing nail device using this method of use essentially only has hollow nails for fixing. Therefore, the fixing nail device has the following disadvantages: 1. Poor strength, easy to bend or break the needle, and easily lead to internal fixation failure; 2. Hollow The nails are easily deformed, which can easily lead to failure of internal fixation. SUMMARY OF THE INVENTION [0003] The inventor has carefully designed and developed a locking pin type central nail device, which overcomes the shortcomings of a hollow nail in the background art. [0004] The adopt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/68
Inventor 林志雄张喜贵
Owner DABO MEDICAL TECH CO LTD