A threaded hole protection device and a bone plate including the same.

Abstract

This invention provides a threaded hole protection device and a bone plate including the same. The threaded hole protection device includes: a locking sleeve having a first end and a second end along its length, and a through hole penetrating the first end and the second end; the locking sleeve includes a head section on the first end side and a locking section on the second end side, the locking section being screwed into the threaded hole of the structure to be shaped; an expansion groove is provided on the outer wall of the locking sleeve, one end of the expansion groove being an open end located at the second end of the locking sleeve; and a locking member, which, when fixed in the through hole, can laterally expand the outer wall of the locking sleeve. This invention, by installing the locking sleeve and the locking member into the locking threaded hole, provides vertical and lateral reinforcement to the locking threaded hole, ensuring that the locking threaded hole will not deform when the bone plate is shaped or bent in any direction.

Description

Technical Field

[0001] This invention belongs to the field of medical auxiliary products technology, and particularly relates to a threaded hole protection device and a bone plate containing the same. Background Technology

[0002] The reconstructed locking plate has at least one locking threaded hole in the bone plate, into which a bone screw with an external thread on its head can be screwed in, which can serve as an axial compression and internal support.

[0003] During bone plate shaping, the pre-formed threaded hole may deform as the bone plate is shaped, changing from a circle to a lemon shape. This can damage the threads, preventing the bone screw from being screwed into the locking threaded hole. Consequently, the screw head and the bone plate hole fail to lock, thus failing to achieve the locking effect, affecting fracture reduction, and prolonging the operation time. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art. Its purpose is to provide a thread hole protection device and a bone plate containing the device, which strengthens the thread hole vertically and laterally by installing a locking sleeve and a locking member into the thread hole of the structure to be shaped, so that the thread hole will not deform when the bone plate is shaped and bent in any direction.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A threaded hole protection device, the threaded hole protection device comprising:

[0007] A locking sleeve has a first end and a second end along its length, and is provided with a through hole penetrating the first end and the second end; the locking sleeve includes a head section on the first end side and a locking section on the second end side, the locking section being screwed into a threaded hole in the structure to be shaped; the outer wall of the locking sleeve is provided with an expansion groove, one end of which is an open end located at the second end of the locking sleeve;

[0008] The locking element, when fixed in the through hole, can laterally expand the outer wall of the locking sleeve.

[0009] Furthermore, the head section is located outside the threaded hole to be bent.

[0010] Furthermore, the outer wall of the locking sleeve is evenly distributed with multiple expansion grooves.

[0011] Furthermore, the other end of the expansion groove is located on the side wall of the head section.

[0012] Furthermore, the through hole of the locking sleeve includes, from the first end to the second end, a first mounting hole, a connecting hole, and a light hole on the same axis, wherein the inner diameter of the connecting hole is smaller than the inner diameter of the first mounting hole and the inner diameter of the connecting section is larger than the inner diameter of the light hole.

[0013] Furthermore, the diameter of the aperture is the same along its length.

[0014] Furthermore, the locking member includes a head and a frustum-shaped rod, the large-diameter end of the frustum-shaped rod is connected to the head, and the head is threadedly connected to the connecting hole.

[0015] Furthermore, the head of the locking member is provided with a second mounting hole.

[0016] Furthermore, the threaded hole of the structure to be shaped is a tapered hole.

[0017] Furthermore, the present invention provides a bone plate comprising the above-mentioned threaded hole protection device.

[0018] Due to the adoption of the above solution, the beneficial effects of the present invention are:

[0019] The threaded hole protection device and the bone plate containing it provided by the present invention, due to the expansion groove provided on the outer wall of the locking sleeve, allow the locking member to laterally expand the locking sleeve, making the gap between the thread on the outer surface of the locking sleeve and the thread in the threaded hole smaller and the engagement tighter. This reduces direct damage to the thread in the threaded hole during shaping and provides better protection for the threaded hole, allowing the structure to be shaped with the threaded hole to be shaped and bent in any direction. In addition, the expansion groove provided on the outer wall of the locking sleeve allows the locking sleeve to be easily screwed into or out of the threaded hole.

[0020] The threaded hole protection device and the bone plate locking sleeve containing it provided by the present invention are in tapered thread engagement with the threaded hole of the structure to be shaped, which can realize the vertical reinforcement of the threaded hole by the threaded hole protection device; at the same time, the locking member laterally expands the locking sleeve, so that the threaded hole protection structure laterally reinforces the threaded hole of the structure to be shaped; the vertical reinforcement and lateral reinforcement ensure that the threaded hole will not deform when it is shaped and bent in any direction;

[0021] The threaded hole protection device and the bone plate containing it provided by this invention have a hollow locking sleeve, which can be used as a guide sleeve for the bone plate. The same set of instruments can achieve both threaded hole protection and drilling of the bottom hole. Moreover, due to the setting of the locking element, even if the locking sleeve is slightly deformed after shaping, the locking block will restore the structure of the locking sleeve when it is unscrewed, without affecting the guiding function. In addition, the threaded hole protection structure can be assembled on the bone plate before leaving the factory, and the shaping of the bone plate and drilling of the bottom hole can be performed directly and sequentially during the operation, reducing the operation time. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a bone plate including a threaded hole protection device provided in one embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the middle locking sleeve;

[0024] Figure 3 yes Figure 1 A schematic diagram of the locking mechanism.

[0025] The components are: 1. Bone plate; 11. Locking threaded hole; 2. Protective device; 3. Locking sleeve; 31. First end; 32. Second end; 33. Head section; 34. Locking frustum section; 35. First external thread; 36. Expansion groove; 37. Connecting hole; 38. Smooth hole; 39. First internal thread; 310. First mounting hole; 4. Locking element; 41. Head; 42. Rod; 43. Second external thread; 44. Second mounting hole. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0027] One embodiment of the present invention provides a bone plate including a threaded hole protection device, the threaded hole protection device being assembled in a locking threaded hole 11 of the bone plate 1, such as... Figures 1 to 3 As shown, the protective device 2 includes a locking sleeve 3 and a locking element 4;

[0028] The locking sleeve 3 has a first end 31 and a second end 32 along its length. The locking sleeve 3 includes a head section 33 on the first end side and a locking frustum section 34 on the second end side. The head section 33 and the locking frustum section 34 are arranged coaxially, and one end of the head section 33 is provided with the large-diameter end of the locking frustum section 34. The outer wall of the locking frustum section 34 is a tapered surface with a first external thread 35. The tapered surface matches the locking threaded hole 11. The locking frustum section 34 is screwed into the locking threaded hole 11. The side wall of the second end 32 of the locking sleeve 3 is provided with at least one expansion groove 36 along its length direction, preferably a plurality of evenly distributed expansion grooves. For example, 2, 3, 4 or 6, etc. One end of the expansion groove 36 is an open end located at the second end 32 of the locking sleeve 3. The locking sleeve 3 is provided with a through hole passing through the first end 31 and the second end 32. The through hole includes a first mounting hole 310, a connecting hole 37 and a smooth hole 38 connected in sequence along the length direction of the locking sleeve 3. The inner diameter of the connecting hole 37 is smaller than the inner diameter of the first mounting hole 310 and the inner diameter of the connecting hole 37 is larger than the inner diameter of the smooth hole 38. The connecting hole 37 is provided with a first internal thread 39. Preferably, the smooth hole 38 has the same diameter along its length direction. The smooth hole 38 can also be tapered to fit the rod 42 of the locking member 4.

[0029] Specifically, the side wall of the locking frustum section 34 is a threaded surface that engages with the locking threaded hole 11. This surface can be designed according to the surface of the locking threaded hole 11, such as a conical or cylindrical surface. The locking sleeve 3 can circumferentially reinforce the locking threaded hole 11 and its internal threads to achieve vertical locking. The side wall of the second end of the locking sleeve 3 is provided with an expansion groove 36 along its length, which facilitates easy screwing of the locking sleeve 3 into the locking threaded hole 11. After the locking member 4 is screwed out of the locking sleeve 3, the expansion groove 36 can be reset, which facilitates the screwing out of the locking threaded hole 11.

[0030] The locking component 4 includes a head 41 and a rod 42 connected to the head 41. The head 41 is a cylindrical structure, and the rod 42 is a frustum-shaped structure. The large-diameter end of the rod 42 is connected to the end face of the head 41. The outer wall of the head 41 is provided with a second external thread 43. The head 41 is screwed into the connecting hole 37. The second external thread 43 is engaged with the first internal thread 39. The diameter of the light hole 38 of the locking sleeve 3 is smaller than the diameter of the large-diameter end of the rod 42 and larger than the diameter of the small-diameter end of the rod 42.

[0031] The outer wall of the head 41 is provided with a second external thread 43, and the head 41 can be screwed into the connecting hole 37; the rod 42 has a frustum-shaped structure, which makes it easy to install into the locking sleeve light hole 38 and remove from the light hole 38. When the head 41 of the locking member 4 is screwed into the connecting hole 37 of the locking sleeve 3, the rod 42 can laterally open the side wall of the second end 32 of the locking sleeve 3. The side wall of the second end 32 of the locking sleeve 3 can abut against the inner wall of the locking thread hole 11, so as to achieve a tight engagement between the thread of the locking thread hole 11 and the first external thread 35, and between the first internal thread 39 and the second external thread 43.

[0032] There is a gap between the head of the locking sleeve 3 and the locking threaded hole 11. The rod 42 of the locking member 4 has a frustum-shaped structure. As the head 41 is screwed into the connecting hole 37 of the locking sleeve 3, the rod 42 can be easily screwed into the light hole 38 of the locking sleeve 3. The rod 42 can gradually spread the side wall of the second end 32 of the locking sleeve 3 laterally, so that the side wall of the second end 32 of the locking sleeve 3 abuts against the inner wall of the locking threaded hole 11, reducing the gap between the first external thread 35 and the internal thread of the locking threaded hole 11, realizing the tight engagement between the internal thread of the locking threaded hole 11 and the first external thread 35, and between the first internal thread 39 and the second external thread 43. At the same time, it reduces the direct damage to the internal thread of the locking threaded hole 11, improves the rigidity of the protective device 2, and allows the bone plate 1 with the locking threaded hole 11 to be shaped and bent in any direction.

[0033] Since the locking sleeve 3 and the locking element 4 need to have a certain rigidity, it is preferable that the locking sleeve 3 and the locking element 4 are made of high-strength stainless steel. The reconstruction locking bone plate 1 is generally a titanium bone plate 1. High-strength stainless steel has high rigidity and yield strength, which can protect the locking threaded hole 11 from plastic deformation and bending when subjected to external force.

[0034] Furthermore, such as Figure 1 As shown, the length of the locking frustum section 34 is not shorter than the thickness of the bone plate 1, so that the locking threaded hole 11 can be fully screwed into the locking frustum section 34, and the locking sleeve 3 can reinforce the entire locking threaded hole 11. The other end of the expansion groove 36 is provided on the side wall of the head section 33. When the rod 42 is installed into the light hole 38 of the locking sleeve 3, the rod 42 can laterally expand the side wall of the locking frustum section 34, including the corresponding locking threaded hole 11, to achieve a tight engagement between the entire internal thread of the locking threaded hole 11 and the first external thread 35.

[0035] Among them, such as Figure 1 , Figure 2 As shown, the inner hole of the locking sleeve 3, from the first end 31 to the second end 32, includes a first mounting hole 310, a connecting hole 37, and a smooth hole 38, all on the same axis. The first mounting hole 310 facilitates screwing the locking sleeve 3 into the locking threaded hole 11. The inner diameter of the connecting hole 37 is smaller than that of the first mounting hole 310, and the inner diameter of the connecting hole 37 is larger than that of the smooth hole 38. Furthermore, this invention not only protects the threaded hole, but also, because each segment of the inner hole of the locking sleeve 3 is coaxially arranged, and the smooth hole 38 with the smallest inner diameter is a cylindrical or conical hole, it facilitates the insertion of a pilot hole drill bit into the inner hole of the locking sleeve 3, simplifying the use of spare tools. Specifically, after the locking member 4 is unscrewed and the locking sleeve 3 is locked, the expansion groove 36 can be reset, which is beneficial for achieving its pilot hole drill bit guiding function.

[0036] Furthermore, such as Figure 1 , Figure 3 As shown, the end face of the first end side of the head 41 is provided with a second mounting hole 44, which facilitates screwing the locking sleeve 3 into the locking threaded hole 11.

[0037] Specifically, such as Figure 2 , Figure 3 As shown, the first mounting hole 310 and the second mounting hole 44 are internal square holes, internal hexagonal holes, or internal star-shaped holes. The locking sleeve 3 can be locked in the locking threaded hole 11 using an internal hex wrench, internal square wrench, or internal star-shaped wrench. The locking member 4 can be locked in the inner hole of the locking sleeve 3 using an internal hex wrench, internal square wrench, or internal star-shaped wrench.

[0038] The protective device 2 can be installed in the locking threaded hole 11 before leaving the factory, such as Figure 1 As shown, the bone plate 1 can be bent and perforated directly during the operation to shorten the operation time.

[0039] The following describes the operation steps of assembling the protective device 2 in the bone plate and its use, with reference to the accompanying drawings:

[0040] St1 Use a wrench to install and lock the locking sleeve 3 into the locking threaded hole 11 of the bone plate 1. The locking sleeve 3 can circumferentially reinforce the locking threaded hole 11 and its internal thread to achieve vertical locking.

[0041] St2 uses a wrench to screw the head 41 into the locking sleeve connection hole 37, so that the locking member 4 rod 42 is screwed into the locking sleeve smooth hole 38 and gradually laterally opens the side wall of the second end of the locking sleeve 3, so that the side wall of the second end of the locking sleeve 3 abuts against the inner wall of the locking thread hole 11, reducing the gap between the first external thread 35 and the internal thread of the locking thread hole 11, realizing a tight engagement between the internal thread of the locking thread hole 11 and the first external thread 35, and between the first internal thread 39 and the second external thread 43, while reducing direct damage to the internal thread of the locking thread hole 11, improving the rigidity of the protective device 2, and allowing the bone plate 1 with the locking thread hole 11 to be shaped and bent in any direction.

[0042] St3 follows the steps of St1 and St2 to screw the locking sleeve 3 and locking element 4 into each locking threaded hole 11 on the bone plate 1.

[0043] St4 uses bending pliers to bend and shape the bone plate 1 as needed.

[0044] St5 places the shaped bone plate 1 at the patient's fracture site, first uses a Kirschner wire to position the bone plate 1, and then removes the locking piece 4.

[0045] St6 first uses a drill bit to drill the bottom hole by relying on the locking sleeve 3 of each locking thread hole 11, then removes the locking sleeve 3, and then screws the locking screw into each locking thread hole 11 in turn to complete the fixation of the bone plate 1 at the patient's fracture position.

[0046] The bone plate containing the threaded hole protection device has the following advantages:

[0047] Due to the expansion groove on the outer wall of the locking sleeve, the locking element can laterally expand the locking sleeve, making the gap between the threads on the outer surface of the locking sleeve and the threads in the threaded hole smaller and the engagement tighter. This reduces direct damage to the threads in the threaded hole during shaping and provides better protection for the threaded hole, allowing the structure to be shaped and bent in any direction. In addition, the expansion groove on the outer wall of the locking sleeve allows the locking sleeve to be easily screwed into or out of the threaded hole.

[0048] The locking sleeve and the threaded hole of the structure to be shaped are in tapered thread engagement, which can realize the vertical reinforcement of the threaded hole by the threaded hole protection device; at the same time, the locking part laterally expands the locking sleeve, so that the threaded hole protection structure laterally reinforces the threaded hole of the structure to be shaped; the vertical and lateral reinforcements ensure that the threaded hole will not deform when it is shaped and bent in any direction.

[0049] Because the locking sleeve has a hollow structure, it can be used as a guide sleeve for the bone plate. The same set of instruments can both protect the threaded hole and achieve the purpose of drilling the bottom hole. Moreover, due to the setting of the locking element, even if the locking sleeve is slightly deformed after shaping, the locking block will restore the structure of the locking sleeve when it is unscrewed, without affecting the guiding function. In addition, the threaded hole protection structure can be assembled on the bone plate before leaving the factory, and the shaping of the bone plate and drilling of the bottom hole can be performed directly in sequence during the operation, reducing the operation time.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A threaded hole protection device, characterized in that, The threaded hole protection device includes: A locking sleeve has a first end and a second end along its length, and is provided with a through hole penetrating the first end and the second end. The through hole of the locking sleeve includes, from the first end to the second end, a first mounting hole, a connecting hole, and a through hole on the same axis. The inner diameter of the connecting hole is smaller than the inner diameter of the first mounting hole, and the inner diameter of the connecting section is larger than the inner diameter of the through hole. The locking sleeve includes a head section on the first end side and a locking section on the second end side. The locking section is screwed into the threaded hole of the structure to be shaped. An expansion groove is provided on the outer wall of the locking sleeve, and one end of the expansion groove is an open end located at the second end of the locking sleeve. The locking component includes a head and a frustum-shaped rod. The large-diameter end of the frustum-shaped rod is connected to the head, and the head is threadedly connected to a connecting hole. When it is fixed in the through hole, it can laterally open the outer wall of the locking sleeve.

2. The threaded hole protection device according to claim 1, characterized in that, The head section is located outside the threaded hole to be bent.

3. The threaded hole protection device according to claim 1, characterized in that, The outer wall of the locking sleeve has multiple expansion grooves evenly distributed.

4. The threaded hole protection device according to claim 1, characterized in that, The other end of the expansion groove is located on the side wall of the head section.

5. The threaded hole protection device according to claim 1, characterized in that, The aperture has the same diameter along its length.

6. The threaded hole protection device according to claim 1, characterized in that, The head of the locking member is provided with a second mounting hole.

7. The threaded hole protection device according to claim 1, characterized in that, The threaded hole of the structure to be shaped is a tapered hole.

8. A bone plate comprising the threaded hole protection device as described in any one of claims 1-7.

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