Intramedullary nail fixing structure

Abstract

The utility model relates to an intramedullary nail fixing structure which is characterized in that a rod body of a main nail is provided with an inclined hole used for placing a supporting nail, the inclined hole is high in left and low in right, the rod body of the main nail is provided with a through hole used for placing a locking nail, and the through hole is located under the inclined hole; the fixing device comprises two fixing assemblies which are arranged in the main nail and used for fixing the two supporting nails, and a driving assembly used for driving the two fixing assemblies to move in the opposite directions is arranged in the main nail. A settlement rotating table in a settlement hole can drive a threaded rod in a placement groove to rotate, so that two threaded sleeve plates located at two sections of threads on the threaded rod move in opposite directions, two locking rods can be controlled to penetrate through small holes in the middles of the supporting nails, and the two supporting nails can be fixed; not only can the operation time of a doctor be shortened, but also the problem that the support nail slides and falls from the inclined hole to cause one-time injury to more bones of a patient can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the intramedullary nail technical field especially is related to a intramedullary nail fixing structure. BACKGROUND

[0002] The intramedullary nail is the first choice of internal fixation of femoral shaft fracture, and the intramedullary nail belongs to the orthopedic internal fixation device in medical devices. The structure has an intramedullary nail rod, a proximal locking screw hole is arranged at the proximal end of the intramedullary nail rod, and a decompression plane is arranged on the surface of the intramedullary nail rod. One or more than one long strip-shaped decompression planes are arranged on the surface of the intramedullary nail rod, and the decompression plane can extend from the proximal end of the intramedullary nail rod to the distal end of the intramedullary nail rod. For example, as shown in a femoral intramedullary fixation device in Chinese patent application No. CN201820277975.2, the proximal end of the intramedullary nail is sequentially provided with a first through hole and a second through hole which pass through laterally, and the distal end is provided with a third through hole through which the cortical bone screw passes and is fixed; the compression screw structure includes a transverse sleeve matched with the second through hole and a compression screw passing through the transverse sleeve at the proximal end; characterized in that the fixing device further includes a support lock pin passing through the first through hole at the proximal end and being fixed; the transverse sleeve is provided with a clamping groove; the distal end head of the support lock pin is on the clamping groove, so that the proximal end of the intramedullary nail, the transverse sleeve and the support lock pin form a triangular mechanical stable structure.

[0003] However, when the support lock pin is fixed by the compression screw, the compression screw is inclined to penetrate the support lock pin and fix it. However, the support lock pin may cause the compression screw to fall out of the support lock pin during long-term use. At the same time, only one screw is added in the bone, which not only increases the operation time of the doctor, but also causes damage to the patient's bone. UTILITY MODEL CONTENTS

[0004] To solve the problem that the compression screw is inclined to penetrate the support lock pin and fix it, and the support lock pin may cause the compression screw to fall out of the support lock pin during long-term use, and only one screw is added in the bone, which not only increases the operation time of the doctor, but also causes damage to the patient's bone, the utility model provides the following technical scheme:

[0005] An intramedullary nail fixing structure includes a main nail for fixing the femoral canal, a support pin is arranged in the main nail for fixing the main nail, and the support pin has two ends, a threaded tooth is arranged at the end of the support pin to facilitate the threaded connection between the threaded tooth at the end of the support pin and the femur, so as to fix the main nail; a small hole is formed in the middle of the support pin to facilitate the penetration of the fixing assembly through the small hole in the middle of the support pin, so as to fix the two support pins; a lock pin is arranged in the main nail for fixing the main nail, and the lock pin is located below the support pin; and a fixing device is arranged in the main nail for fixing the support pin.

[0006] The fixing device comprises two fixing assemblies arranged in the main nail for fixing the two support nails, and a driving assembly arranged in the main nail for driving the two fixing assemblies to move in opposite directions.

[0007] Further, a placing groove for placing the driving assembly is arranged in the main nail, a sinking hole is arranged at the top end of the main nail, and a long groove for the up-and-down movement of the fixing assembly is arranged in the main nail.

[0008] Further, an inclined hole for placing the support nail is arranged on the rod of the main nail, and the inclined hole is higher on the left and lower on the right, and a through hole for placing the locking nail is arranged on the rod of the main nail and located directly below the inclined hole.

[0009] Further, the driving assembly comprises a threaded rod arranged in the placing groove for rotation, and a sinking rotating table for driving the threaded rod to rotate is fixedly arranged at the top end of the threaded rod and rotates in the sinking hole.

[0010] Further, the fixing assembly comprises a threaded sleeve plate threadedly connected with the threaded rod for up-and-down movement, a connecting plate is fixedly arranged at the rear end of the threaded sleeve plate, and a locking rod for fixing the support nail is fixedly arranged at the top end of the connecting plate.

[0011] Compared with the prior art, the fixing device has the following beneficial effects:

[0012] When the two support nails in the main nail need to be fixed, the sinking rotating table in the sinking hole drives the threaded rod in the placing groove to rotate, the two threaded sleeve plates at the two threaded sections on the threaded rod move in opposite directions, the two locking rods can pass through the small holes in the middle of the support nails, the two support nails can be fixed, the operation time of the doctor can be shortened, and the problem that the support nails slide out of the inclined holes and cause damage to the patient's bones can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor.

[0014] The structure, proportion, size and the like shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not have technical substantive significance, and any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.

[0015] Figure 1 It is a whole structure schematic view of the utility model;

[0016] Figure 2 It is a main nail sectional view of the utility model;

[0017] Figure 3 It is a fixed device structure schematic view of the utility model;

[0018] Figure 4 It is a driving assembly and fixed assembly cooperation view of the utility model.

[0019] In the drawings, the component names represented by each reference sign are listed as follows:

[0020] 100-main nail, 101-settling hole, 102-placing groove, 103-inclined hole, 104-long groove, 105-through hole;

[0021] 200-supporting nail;

[0022] 300-fixed device, 310-driving assembly, 311-settling rotating block, 312-threaded rod, 320-fixed assembly, 321-threaded sleeve plate, 322-connecting plate, 323-locking rod;

[0023] 400-locking nail. DETAILED DESCRIPTION

[0024] The preferred specific embodiments for realizing the utility model are described in detail below, and clear and complete descriptions are made in conjunction with the drawings.

[0025] Please refer to Figures 1-4 The utility model provides a intramedullary nail fixed structure.

[0026] The utility model discloses a intramedullary nail fixed structure, including the main nail 100 that fixes femoral marrow, be provided with the supporting nail 200 for fixing the main nail 100 in the main nail 100, and the supporting nail 200 has two, be provided with the locking nail 400 for fixing the main nail 100 in the main nail 100, and the locking nail 400 is located the below of supporting nail 200, be provided with the fixed device 300 for fixing the supporting nail 200 in the main nail 100.

[0027] The main nail 100 is provided with a placing slot 102 for placing the driving assembly 310, so as to facilitate the rotation of the driving assembly 310 in the placing slot 102, and the fixed assembly 320 can move up and down in the long slot 104, so as to fix the two supporting nails 200 and prevent the supporting nails 200 from tilting and falling. The top end of the main nail 100 is provided with a settlement hole 101, and the main nail 100 is provided with a long slot 104 for the up and down movement of the fixed assembly 320.

[0028] The rod body of the main nail 100 is provided with an inclined hole 103 for placing the supporting nail 200, and the inclined hole 103 is high on the left and low on the right, and there are two inclined holes 103, so as to facilitate the penetration of the two supporting nails 200 into the two inclined holes 103 and the connection with the bone, so as to fix the femur. The rod body of the main nail 100 is provided with a through hole 105 for placing the locking nail 400, and the through hole 105 is located directly below the inclined hole 103, so as to facilitate the penetration of the two locking nails 400 into the two through holes 105 and the threaded connection with the bone, so as to fix the main nail 100 on the femur.

[0029] The end of the supporting nail 200 is provided with a threaded tooth, so as to facilitate the threaded connection of the threaded tooth at the end of the supporting nail 200 with the femur, so as to fix the main nail 100. The middle part of the supporting nail 200 is provided with a small hole, so as to facilitate the penetration of the fixed assembly 320 into the small hole in the middle part of the supporting nail 200, so as to fix the two supporting nails 200. In order to prevent the two supporting nails 200 from falling out of the inclined hole 103.

[0030] The fixing device 300 comprises two fixed assemblies 320 arranged in the main nail 100 for fixing the two supporting nails 200, and the main nail 100 is provided with a driving assembly 310 for driving the two fixed assemblies 320 to move in opposite directions.

[0031] The driving assembly 310 comprises a threaded rod 312 arranged in the placing slot 102 for rotation, and the upper and lower ends of the threaded rod 312 are connected to the groove body of the placing slot 102 through bearings, so as to facilitate the rotation of the threaded rod 312. Meanwhile, the rod body of the threaded rod 312 is provided with two sections of threads which are symmetrical in up and down directions, and the thread rotation directions of the two sections of threads are opposite, so as to facilitate the rotation of the threaded rod 312, and the fixed assemblies 320 located at the two sections of threads on the threaded rod 312 move up and down, so as to fix the two supporting nails 200.

[0032] The top end of the threaded rod 312 is fixedly installed with a settlement rotating table 311 for driving the threaded rod 312 to rotate, and the settlement rotating table 311 rotates in the settlement hole 101; so that when it is needed to fix the two support nails 200 in the main nail 100, the settlement rotating table 311 in the settlement hole 101 can drive the threaded rod 312 in the placing groove 102 to rotate, so that the two threaded sleeve plates 321 at the two threaded positions on the threaded rod 312 can move up and down, and the two support nails 200 can be fixed.

[0033] The fixing assembly 320 comprises a threaded sleeve plate 321 for up and down movement in threaded connection with the threaded rod 312, and the shape and size of the threaded sleeve plate 321 are the same as those of the long groove 104, so as to facilitate the threaded sleeve plate 321 to move up and down along the threaded rod 312 under the rotation of the threaded rod 312; the rear end of the threaded sleeve plate 321 is fixedly installed with a connecting plate 322, and the top end of the connecting plate 322 is fixedly installed with a locking rod 323 for fixing the support nail 200; so that when it is needed to fix the two support nails 200 in the main nail 100, the settlement rotating table 311 in the settlement hole 101 can drive the threaded rod 312 in the placing groove 102 to rotate, so that the two threaded sleeve plates 321 at the two threaded positions on the threaded rod 312 can move in opposite directions, the two locking rods 323 can be controlled to penetrate the small holes in the middle of the support nails 200, and the two support nails 200 can be fixed, which can not only help to shorten the operation time of doctors, but also can prevent the support nails 200 from sliding and falling from the inclined holes 103 to cause damage to the patient's bones.

[0034] Based on the above content and the drawings, those skilled in the art can understand and implement the present application. Furthermore, any non-creative modification of the present application made by those skilled in the art without creative labor still falls within the protection scope of the present application.

Claims

1. An intramedullary nail fixation structure comprising a main nail (100) for fixation of the medullary canal of a femur, characterized in that: Support nails (200) are arranged in the main nail (100) for fixing the main nail (100), and the support nails (200) are two, lock nails (400) are arranged in the main nail (100) for fixing the main nail (100), and the lock nails (400) are located below the support nails (200), and fixing devices (300) are arranged in the main nail (100) for fixing the support nails (200). The fixing device (300) includes two fixing assemblies (320) arranged in the main nail (100) for fixing the two support nails (200), and the main nail (100) is provided with a driving assembly (310) for driving the two fixing assemblies (320) to move in opposite directions.

2. The intramedullary nail fixation construct of claim 1, wherein: The main nail (100) is provided with a placing groove (102) for placing the driving assembly (310), the top end of the main nail (100) is provided with a settling hole (101), and the main nail (100) is provided with a long groove (104) for the up and down movement of the fixing assembly (320).

3. The intramedullary nail fixation construct of claim 2, wherein: The rod body of the main nail (100) is provided with an inclined hole (103) for placing the support nail (200), and the inclined hole (103) is high on the left and low on the right, the rod body of the main nail (100) is provided with a through hole (105) for placing the lock nail (400), and the through hole (105) is located directly below the inclined hole (103).

4. The intramedullary nail fixation construct of claim 2, wherein: The driving assembly (310) includes a threaded rod (312) arranged in the placing groove (102) for rotation, the top end of the threaded rod (312) is fixedly installed with a settling rotary table (311) for driving the threaded rod (312) to rotate, and the settling rotary table (311) rotates in the settling hole (101).

5. The intramedullary nail fixation construct of claim 4, wherein: The fixing assembly (320) includes a threaded sleeve plate (321) threadedly connected with the threaded rod (312) for up and down movement, the rear end of the threaded sleeve plate (321) is fixedly installed with a connecting plate (322), and the top end of the connecting plate (322) is fixedly installed with a locking rod (323) for fixing the support nail (200).

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