An easy-to-operate elastic intramedullary nail removal device

Abstract

The present invention discloses an elastic intramedullary nail removal device that is easy to operate, including a first shell, a first handle, a first through groove, a first mounting groove, a second mounting groove, an elastic gasket, a nail removal assembly, a second shell, a limiting rod, a sliding groove, a second handle, a first rotating shaft, a first gear, a first spring, a second rotating shaft, a second gear, a third gear, a clamping rod, a rack, a limiting groove, a second through groove, a third mounting groove, a clamping block, a limiting block and a shift rod. The first handle is fixedly connected to the outer wall of the bottom end of the first shell, and a first through groove is provided on the outer wall of the bottom end of the first shell. Compared with the existing intramedullary nail removal device, the nail removal assembly designed in the present invention can remove the intramedullary nail through a smaller incision, which can reduce damage to surrounding soft tissues, shorten operation time, and save medical expenses; the second shell designed in the present invention can be rotated so that the nail removal assembly can adapt to the inclined incision, avoiding inconvenience caused to medical staff by inclined operation.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, in particular to an elastic intramedullary nail removal device that is easy to operate. Background Art

[0002] Elastic intramedullary nails are widely used in pediatric fractures. After the fracture heals, a second surgery is required to remove the elastic intramedullary nail. However, current removal devices are very clumsy and require the tail of the intramedullary nail to be fully exposed before they can be clamped. Because the intramedullary nail is relatively short outside the bone cortex, it is difficult for the removal device to generate sufficient gripping force, which increases the difficulty of removal. At the same time, the surrounding soft tissue needs to be peeled off, causing greater damage. Existing intramedullary nail removal devices cannot adjust the angle during use. When facing an inclined incision, the entire device needs to be tilted, which is not conducive to the operation of medical staff. Summary of the Invention

[0003] The object of the present invention is to provide an elastic intramedullary nail removal device that is easy to operate, so as to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an elastic intramedullary nail removal device that is easy to operate, comprising a first shell and a nail removal assembly, wherein the nail removal assembly is installed inside the first shell, and the nail removal assembly comprises a second shell, the interior of the first shell is sleeved with the second shell, a first mounting rod is fixedly connected to an outer wall of one side of the second shell, a second mounting rod is provided at the top end of the first mounting rod, and the second mounting rod is fixedly connected to an outer wall of one side of the second shell, a clamping rod is symmetrically provided inside the second mounting rod, and a clamping block is installed at the bottom end of the clamping rod.

[0005] Preferably, a first mounting groove is provided on an outer wall of one side of the first shell, and a first mounting rod is sleeved on an inner wall of one side of the first mounting groove, a second mounting groove is symmetrically provided on the inner walls on both sides of the first mounting groove, limiting rods are symmetrically fixed on both sides of the second shell, and the limiting rods are sleeved on an inner wall of one side of the second mounting groove, elastic washers are symmetrically fixed on the inner walls on both sides of the second mounting groove, and the elastic washers are arranged on one side of the limiting rod.

[0006] Preferably, a first rotating shaft is rotatably connected to an outer wall of one side of the second shell, a first gear is fixedly connected to an outer wall of one side of the first rotating shaft, second gears are symmetrically meshed on both sides of the first gear, a second rotating shaft is fixedly connected to the inside of the second gear, and the second rotating shaft is rotatably connected to an outer wall of one side of the second shell, a third gear is fixedly connected to an outer wall of one side of the second rotating shaft, a rack is meshed with one side of the third gear, and the rack is fixedly connected to an outer wall of one side of the clamping rod, a guide rod is fixedly connected to an inner wall of one side of the second shell, and the clamping rod is slidably connected to an outer wall of one side of the guide rod.

[0007] Preferably, a second handle is fixedly connected to an outer wall of one side of the first rotating shaft, a sliding groove is provided on an outer wall of one side of the second shell, and the second handle is sleeved on an inner wall of one side of the sliding groove, a first spring is sleeved on one end of the first rotating shaft, and one end of the first spring is fixedly connected to an inner wall of one side of the second shell, and the other end is fixedly connected to an outer wall of one side of the first rotating shaft.

[0008] Preferably, a limiting groove is provided on one outer wall of the clamping rod, a limiting block is fixedly connected to the top outer wall of the clamping block, and the limiting block is slidably connected to one inner wall of the limiting groove.

[0009] Preferably, a third mounting groove is provided on the top inner wall of the limiting groove, a stop block is sleeved on the inner wall of one side of the third mounting groove, a shift rod is fixedly connected to the top outer wall of the stop block, a second through groove is provided on the inner wall of one side of the third mounting groove, and the shift rod is slidably connected to the inner wall of one side of the second through groove.

[0010] Preferably, a second spring is installed inside the third installation slot, and one end of the second spring is fixedly connected to the top outer wall of the stopper, and the other end is fixedly connected to the top inner wall of the third installation slot.

[0011] Preferably, a first handle is fixedly connected to the outer wall of the bottom end of the first shell, and a first through groove is formed on the outer wall of the bottom end of the first shell.

[0012] Compared with the prior art, the beneficial effects of the present invention are: compared with the existing intramedullary nail removal device, the nail removal assembly designed in the present invention can remove the intramedullary nail through a smaller incision, which can reduce damage to surrounding soft tissues, shorten operation time, and save medical expenses; the second shell designed in the present invention can be rotated so that the nail removal assembly can adapt to the inclined incision, avoiding the inconvenience caused to medical staff by inclined operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0014] Figure 2 for Figure 1 A magnified view of the structure of area A in the middle;

[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the first shell of the present invention;

[0016] Figure 4 is a schematic diagram of the three-dimensional structure of the second shell of the present invention;

[0017] Figure 5 It is a schematic side view of the cutaway structure of the second housing of the present invention;

[0018] Figure 6This is a schematic diagram of a top-down cross-sectional structure of the second housing of the present invention;

[0019] Figure 7 This is a schematic diagram of the main cross-sectional structure of the limiting groove of the present invention;

[0020] In the figure: 1. first shell; 11. first handle; 12. first through slot; 13. first mounting slot; 14. second mounting slot; 141. elastic washer; 2. nail removal assembly; 21. second shell; 211. limiting rod; 212. sliding slot; 22. second handle; 23. first rotating shaft; 231. first gear; 232. first spring; 24. second rotating shaft; 241. second gear; 242. third gear; 25. clamping rod; 251. rack; 252. limiting slot; 253. second through slot; 254. third mounting slot; 255. clamping block; 256. limiting block; 257. stop block; 258. shift rod; 259. second spring; 26. guide rod; 27. first mounting rod; 28. second mounting rod. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-7, the present invention provides an embodiment: an elastic intramedullary nail removal device that is easy to operate, including a first shell 1 and a nail removal assembly 2, the first shell 1 is equipped with a nail removal assembly 2, the nail removal assembly 2 includes a second shell 21, the first shell 1 is sleeved with the second shell 21, a first mounting rod 27 is fixedly connected to the outer wall of one side of the second shell 21, a second mounting rod 28 is provided at the top of the first mounting rod 27, and the second mounting rod 28 is fixedly connected to the outer wall of one side of the second shell 21, a clamping rod 25 is symmetrically provided inside the second mounting rod 28, and a clamping block 255 is installed at the bottom end of the clamping rod 25; a first mounting groove 13 is opened on the outer wall of one side of the first shell 1, and the first mounting rod 27 is sleeved on On the inner wall of one side of the first mounting groove 13, the inner walls on both sides of the first mounting groove 13 are symmetrically provided with second mounting grooves 14, and the limiting rods 211 are symmetrically fixed on both sides of the second shell 21, and the limiting rods 211 are sleeved on the inner wall of one side of the second mounting groove 14, and elastic washers 141 are symmetrically fixed on the inner walls on both sides of the second mounting groove 14, and the elastic washers 141 are arranged on one side of the limiting rod 211. The first mounting groove 13 is used to install the first mounting rod 27, and the second mounting groove 14 is used to install the limiting rod 211. The elastic washer 141 is used to squeeze and fix the limiting rod 211; the first rotating shaft 23 is rotatably connected to the outer wall of one side of the second shell 21, and the first gear 23 is fixedly connected to the outer wall of one side of the first rotating shaft 23 1. The first gear 231 is symmetrically meshed with the second gear 241 on both sides. The second gear 241 is fixedly connected to the second rotating shaft 24 inside, and the second rotating shaft 24 is rotatably connected to the outer wall of one side of the second shell 21. The outer wall of one side of the second rotating shaft 24 is fixedly connected to the third gear 242. One side of the third gear 242 is meshed with the rack 251, and the rack 251 is fixedly connected to the outer wall of one side of the clamping rod 25. A guide rod 26 is fixedly connected to the inner wall of one side of the second shell 21, and the clamping rod 25 is slidably connected to the outer wall of one side of the guide rod 26. The first rotating shaft 23 drives the second gear 241 through the first gear 231, and the second gear 241 drives the third gear 242 through the second rotating shaft 24. The three gears 242 drive the clamping rod 25 via the rack 251, and the guide rod 26 is used to guide the clamping rod 25; the second handle 22 is fixedly connected to the outer wall of one side of the first rotating shaft 23, and a sliding groove 212 is provided on the outer wall of one side of the second shell 21, and the second handle 22 is sleeved on the inner wall of one side of the sliding groove 212. One end of the first rotating shaft 23 is sleeved with a first spring 232, and one end of the first spring 232 is fixedly connected to the inner wall of one side of the second shell 21, and the other end is fixedly connected to the outer wall of one side of the first rotating shaft 23. The second handle 22 is used to drive the first rotating shaft 23 to rotate, and the sliding groove 212 facilitates the displacement of the second handle 22. The first spring 232 is used to reset the first rotating shaft 23 and the second handle 22;A limiting groove 252 is provided on the outer wall of one side of the clamping rod 25, and a limiting block 256 is fixedly connected to the outer wall of the top end of the clamping block 255, and the limiting block 256 is slidably connected to the inner wall of one side of the limiting groove 252. The limiting groove 252 and the limiting block 256 are used to install the clamping block 255; a third mounting groove 254 is provided on the inner wall of the top end of the limiting groove 252, and a stopper 257 is sleeved on the inner wall of one side of the third mounting groove 254. A detent rod 258 is fixedly connected to the outer wall of the top end of the stopper 257. A second through groove 253 is provided on the inner wall of one side of the third mounting groove 254, and the detent rod 258 is slidably connected to the inner wall of one side of the second through groove 253. The third mounting groove 254 is used to install the stopper 257. 57 is used to block the stop block 256. The second through-slot 253 is used to install a lever 258, which is used to release the block 257. A second spring 259 is installed inside the third mounting slot 254. One end of the second spring 259 is fixedly connected to the top outer wall of the block 257, and the other end is fixedly connected to the top inner wall of the third mounting slot 254. The second spring 259 is used to reset the block 257. A first handle 11 is fixedly connected to the bottom outer wall of the first housing 1. A first through-slot 12 is defined in the bottom outer wall of the first housing 1. The first handle 11 is used to engage the second handle 22. The first through-slot 12 ensures that the second handle 22 does not become obstructed when the second housing 21 rotates.

[0023] Working principle: When using the nail removal assembly 2 of the present invention to remove nails, first place the first mounting rod 27 close to the lower surface of the intramedullary nail, then hold the first handle 11 on the first housing 1 with your hand, and squeeze the second handle 22 with force, the second handle 22 drives the first rotating shaft 23 to rotate, the first rotating shaft 23 drives the second gear 241 via the first gear 231, the second gear 241 drives the third gear 242 via the second rotating shaft 24, the third gear 242 drives the clamping rod 25 to separate via the rack 251, so that the clamping rod 25 drives the clamping block 255 to clamp the upper and lower sides of the intramedullary nail, and the intramedullary nail can be directly removed after clamping. When parts need to be replaced to adapt to intramedullary nails of different specifications, the lever 258 in the second through slot 253 is moved, and the lever 258 drives the stopper 257 to retract into the third mounting slot 254. At this time, Remove the clamping block 255 and finally replace it with a clamping block 255 of a different size. When the angle needs to be rotated to adapt to the incision angle, grab the first shell 1 and rotate the first mounting rod 27 to drive the second shell 21. The first mounting rod 27 slides along the first mounting groove 13, and the limiting rod 211 will push away the extrusion of the elastic washer 141 and slide along the second mounting groove 14. At the same time, the second handle 22 will move in the first through groove 12. After the angle adjustment is completed, the limiting rod 211 is squeezed and fixed by the elastic washer 141. Among them, the slide groove 212 is used to install the second handle 22, the first spring 232 is used to reset the first rotating shaft 23, the limiting groove 252 and the limiting block 256 are used to install the clamping block 255, the second spring 259 is used to reset the stop block 257, and the guide rod 26 is used to guide the clamping rod 25.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An easy-to-operate elastic intramedullary nail removal device, comprising a first housing (1) and a nail removal assembly (2), characterized in that: The first shell (1) is internally provided with a nail removal assembly (2), and the nail removal assembly (2) includes a second shell (21), the first shell (1) is sleeved with the second shell (21), a first mounting rod (27) is fixedly connected to the outer wall of one side of the second shell (21), a second mounting rod (28) is provided at the top end of the first mounting rod (27), and the second mounting rod (28) is fixedly connected to the outer wall of one side of the second shell (21), a clamping rod (25) is symmetrically provided inside the second mounting rod (28), and a clamping block (255) is installed at the bottom end of the clamping rod (25), and the outer wall of one side of the first shell (1) is fixedly connected to the outer wall of one side of the second shell (21). A first mounting groove (13) is provided on the wall, and a first mounting rod (27) is sleeved on an inner wall of one side of the first mounting groove (13); a second mounting groove (14) is symmetrically provided on the inner walls on both sides of the first mounting groove (13); a limiting rod (211) is symmetrically fixed on both sides of the second shell (21), and the limiting rod (211) is sleeved on an inner wall of one side of the second mounting groove (14); an elastic washer (141) is symmetrically fixed on the inner walls on both sides of the second mounting groove (14), and the elastic washer (141) is arranged on one side of the limiting rod (211); a first rotating rod is rotatably connected on an outer wall of one side of the second shell (21); A shaft (23) is fixedly connected to an outer wall of one side of the first rotating shaft (23), a first gear (231) is fixedly connected to the outer wall of one side of the first rotating shaft (23), a second gear (241) is symmetrically meshed with the two sides of the first gear (231), a second rotating shaft (24) is fixedly connected inside the second gear (241), and the second rotating shaft (24) is rotatably connected to the outer wall of one side of the second housing (21), a third gear (242) is fixedly connected to the outer wall of one side of the second rotating shaft (24), a rack (251) is meshed with one side of the third gear (242), and the rack (251) is fixedly connected to the outer wall of one side of the clamping rod (25), and the second housing (21) A guide rod (26) is fixedly connected to an inner wall of one side of the housing (21), and a clamping rod (25) is slidably connected to an outer wall of one side of the guide rod (26); a second handle (22) is fixedly connected to an outer wall of one side of the first rotating shaft (23); a sliding groove (212) is provided on an outer wall of one side of the second housing (21), and the second handle (22) is sleeved on an inner wall of one side of the sliding groove (212); a first spring (232) is sleeved on one end of the first rotating shaft (23), and one end of the first spring (232) is fixedly connected to an inner wall of one side of the second housing (21), and the other end is fixedly connected to an outer wall of one side of the first rotating shaft (23).

2. The easy-to-operate elastic intramedullary nail removal device according to claim 1, characterized in that: A limiting groove (252) is provided on one side outer wall of the clamping rod (25), a limiting block (256) is fixedly connected to the top outer wall of the clamping block (255), and the limiting block (256) is slidably connected to one side inner wall of the limiting groove (252).

3. The easy-to-operate elastic intramedullary nail removal device according to claim 2, characterized in that: A third mounting groove (254) is provided on the inner wall at the top end of the limiting groove (252), a stopper (257) is sleeved on the inner wall on one side of the third mounting groove (254), a shifting rod (258) is fixedly connected to the outer wall at the top end of the stopper (257), a second through groove (253) is provided on the inner wall on one side of the third mounting groove (254), and the shifting rod (258) is slidably connected to the inner wall on one side of the second through groove (253).

4. The easy-to-operate elastic intramedullary nail removal device according to claim 3, characterized in that: A second spring (259) is installed inside the third installation slot (254), and one end of the second spring (259) is fixedly connected to the top outer wall of the stopper (257), and the other end is fixedly connected to the top inner wall of the third installation slot (254).

5. The easy-to-operate elastic intramedullary nail removal device according to claim 1, characterized in that: A first handle (11) is fixedly connected to the outer wall of the bottom end of the first shell (1), and a first through slot (12) is provided on the outer wall of the bottom end of the first shell (1).

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