Adjustable orthopedic locking screw device

Abstract

The application relates to the field of bone nail positioning devices, and particularly discloses an adjustable orthopedic locking nail device; the application is provided with a telescopic cylinder, an adjusting assembly, an adjusting pull rod and a pull ring; when a surgeon needs to set the locking nail device between two bone nails with different directions, the adjusting pull rod is used to adjust the acting angle between the pull ring and the telescopic cylinder, the pull ring is conveniently sleeved on the bone nails with different directions, a larger implantable selection range of the bone nails is provided for the surgeon, the surgeon can implant the bone nails at different angles according to implantation requirements, the bone nails do not have to be implanted at the same angle due to the limitation of the structure of the traditional locking nail device, and the operation flexibility is higher.

Description

Technical Field

[0001] This invention belongs to the field of bone screw positioning device technology, specifically relating to an adjustable orthopedic screw locking device. Background Technology

[0002] Locking screws are an indispensable key instrument in modern orthopedic reduction surgery. Their core value lies in providing stable and reliable fixation and precise reduction for various fractures, which is an important guarantee for promoting efficient bone healing and functional recovery in patients. However, this instrument faces significant challenges in practical application: due to individual differences in human skeletal anatomy and the complexity of fracture locations, standard plates often cannot be used directly to ensure that the fixation plate perfectly conforms to the bone surface, achieves optimal biomechanical stability, and reduces soft tissue irritation. This forces doctors or technicians to customize plates individually based on imaging data before surgery, or more commonly, to repeatedly and meticulously shape and adjust standard plates on-site using specialized bending tools based on the real-time fracture morphology revealed during surgery.

[0003] Chinese patent CN119367023A discloses an adjustable orthopedic nail-locking device, relating to the field of medical device technology. The device includes a first nail-locking hole and a second nail-locking hole. It further includes: an adjusting belt fixedly connected to the middle of one side of the outer wall of the first nail-locking hole, with a connecting groove in the middle of the adjusting belt; an adjusting groove at one end of the second nail-locking hole; a return spring positioned above one end of the adjusting groove; lifting rods on both sides of the positioning plate; an external rack at the lower end of the lifting rod; an upper positioning block on one side of the bottom of the lifting rod; an internal rack on the outer side of the lifting rod; a transmission gear meshing with one side of the internal rack; a lower positioning block on one side of the internal rack; and a telescopic structure installed on one side of the first nail-locking hole. Through the evenly distributed connecting grooves, precise adjustment of the nail-locking device's length is achieved, improving its usability during use, enhancing support for the bone screw, and reducing secondary injury to the patient.

[0004] During the application process, the applicant discovered that the above-mentioned application has defects in use. Although the locking device disclosed in the application can adjust the working distance between the two locking holes according to the usage requirements, the working angle of the two locking holes cannot be freely adjusted. When the two bone screws are not in the same plane, the two locking holes of the locking device cannot be fitted onto the bone screws, which has structural defects and does not leave sufficient operating space for the surgeon. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide an adjustable orthopedic locking device to solve the problem that the working angle of the two locking holes of the existing locking device cannot be adjusted according to the actual surgical needs, which is a structural defect.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An adjustable orthopedic locking device, comprising:

[0008] The telescopic cylinder consists of an intermediate cylinder and a side cylinder slidably connected to the end of the intermediate cylinder. The intermediate cylinder has an operating hole and multiple positioning holes, and a steering column is connected in the side cylinder.

[0009] An adjustment component is disposed inside the intermediate cylinder and the side cylinder, and is used to adjust the combined length of the intermediate cylinder and the side cylinder;

[0010] An adjusting rod is connected to the end of the side cylinder and includes a mounting rod connected to the end of the side cylinder, a ball cup rod sleeved on the mounting rod, and a threaded cylinder threaded to the mounting rod. The threaded cylinder is rotatably connected to the ball cup rod, and a ball head sleeve rod is movably connected to the end of the ball cup rod.

[0011] A pull ring is connected to the end of the ball head sleeve, and a positioning assembly is provided inside the ball head sleeve. The positioning assembly includes a positioning bolt threaded to the pull ring and a limiting rod slidably inserted into the ball head sleeve. The end of the positioning bolt is rotatably connected to the limiting rod. A slot is provided on the limiting rod, and a first washer is fixedly connected to the slot. Multiple protrusions and a second washer for wrapping the protrusions are fixedly connected to the end of the limiting rod.

[0012] Preferably, both the first gasket and the second gasket are soft rubber gaskets.

[0013] Preferably, the adjustment assembly includes a mounting cylinder rotatably connected to the intermediate cylinder, a slider slidably connected to the mounting cylinder, and a spring disposed in the mounting cylinder. A plurality of insert rods are fixedly connected to the slider, and the insert rods are inserted into the positioning holes. A cable is wound around the mounting cylinder, and the end of the cable is connected to the intermediate cylinder after passing through the steering column.

[0014] Preferably, the spring is pre-compressed, with one end of the spring abutting against the inner wall of the mounting cylinder and the other end abutting against the end of the slider.

[0015] Preferably, the slider has a rectangular groove.

[0016] Preferably, the positioning holes and the insertion rods are arranged in an equally spaced circular array.

[0017] Preferably, the pull ring has semi-circular guide grooves on both sides, and the semi-circular guide grooves are connected to the central hole of the pull ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention, by incorporating a telescopic cylinder, an adjustment component, an adjustment rod, and a pull ring, allows surgeons to adjust the angle between the pull ring and the telescopic cylinder when placing a locking device between two bone screws facing different directions. This facilitates the user in placing the pull ring on the bone screws facing different directions, providing surgeons with a wider range of bone screw implantation options. Surgeons can then implant bone screws at different angles according to their needs, without being limited by the traditional locking device structure that requires implanting bone screws at the same angle, thus offering greater operational flexibility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 Enlarged view of part A in the middle;

[0023] Figure 4 This is a schematic cross-sectional view of the mounting cylinder structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the adjusting rod of the present invention;

[0025] Figure 6 This is a schematic diagram of the cross-sectional structure of the end of the limiting rod of the present invention;

[0026] In the diagram: 1. Intermediate cylinder; 11. Operating hole; 12. Positioning hole; 2. Side cylinder; 21. Steering column; 3. Adjustment assembly; 31. Mounting cylinder; 32. Slider; 33. Spring; 34. Insert rod; 35. Groove; 36. Cable; 4. Adjustment rod; 41. Mounting rod; 42. Ball cup rod; 43. Threaded cylinder; 44. Ball head sleeve rod; 5. Pull ring; 6. Positioning bolt; 7. Limiting rod; 71. Slot; 72. First washer; 73. Spike; 74. Second washer. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1:

[0029] Please see Figure 1 - Figure 6 As shown, an adjustable orthopedic locking device includes:

[0030] The telescopic cylinder consists of an intermediate cylinder 1 and a side cylinder 2 slidably connected to the end of the intermediate cylinder 1. The intermediate cylinder 1 is provided with an operation hole 11 and a plurality of positioning holes 12, and a steering column 21 is connected in the side cylinder 2.

[0031] Adjustment component 3 is disposed inside the intermediate cylinder 1 and the side cylinder 2, and is used to adjust the combined length of the intermediate cylinder 1 and the side cylinder 2;

[0032] Adjusting rod 4 is connected to the end of the side tube 2 and includes a mounting rod 41 connected to the end of the side tube 2, a ball cup rod 42 sleeved on the mounting rod 41, and a threaded cylinder 43 threadedly connected to the mounting rod 41. The threaded cylinder 43 is rotatably connected to the ball cup rod 42, and a ball head sleeve rod 44 is movably connected to the end of the ball cup rod 42.

[0033] Pull ring 5 is connected to the end of ball head sleeve 44, and the ball head sleeve 44 is provided with a positioning component. The working distance between the two pull rings 5 ​​can be adjusted by the different extension lengths of the telescopic cylinder.

[0034] As can be seen from the above, by setting up the telescopic cylinder, adjusting component 3, adjusting rod 4 and pull ring 5, when the surgeon needs to place the locking device between two bone screws facing different directions, the operating angle between the pull ring 5 and the telescopic cylinder can be adjusted by adjusting the rod 4. This makes it easier for the user to put the pull ring 5 on the bone screws facing different directions, providing the surgeon with a wider range of bone screw implantation options. It allows the surgeon to implant bone screws at different angles according to implantation needs, without being limited by the traditional locking device structure and having to implant bone screws at the same angle, thus providing more flexible operation.

[0035] When the surgeon establishes a locking device between two bone screws with different orientations, the first step is to rotate the ball head sleeve 44 to change the orientation of the pull ring 5, allowing the pull ring 5 to be fitted onto the bone screw. The positioning component restricts the sliding between the pull ring 5 and the bone screw. Then, rotating the threaded cylinder 43 moves the ball cup rod 42, causing the ball cup rod 42 to lock the ball head of the ball head sleeve 44. The ball cup of the ball cup rod 42 and the end of the mounting rod 41 will clamp the ball head of the ball head sleeve 44. As the friction of the ball head sleeve 44 increases, the ball head sleeve 44 will not rotate at the end of the ball cup rod 42, thus limiting the working angle of the pull ring 5. At this time, the user can adjust the working length of the telescopic cylinder through the adjusting component 3, and apply tension to the pull ring 5 through the telescopic cylinder and the adjusting rod 4, thereby applying tension to the bone screw and helping the patient heal quickly.

[0036] Please see Figure 5 - Figure 6As shown, the positioning assembly includes a positioning bolt 6 threadedly connected to the pull ring 5 and a limiting rod 7 slidably inserted into the ball head sleeve 44. The end of the positioning bolt 6 is rotatably connected to the limiting rod 7. The limiting rod 7 has a slot 71, and a first washer 72 is fixedly connected to the slot 71. The end of the limiting rod 7 is fixedly connected to a plurality of protrusions 73 and a second washer 74 for wrapping the protrusions 73.

[0037] After the ball cup rod 42 and the mounting rod 41 clamp the end ball of the ball head sleeve rod 44, in order to further improve the connection stability of the ball head sleeve rod 44 and prevent the ball head sleeve rod 44 from rotating inside the ball cup rod 42, the user can rotate the positioning bolt 6. When the positioning bolt 6 moves inside the pull ring 5, it will drive the limiting rod 7 to move. During the movement, the limiting rod 7 will drive the first washer 72 to abut against the bone screw, increasing the friction between the bone screw and the pull ring 5 and preventing the pull ring 5 from sliding on the bone screw. At the same time, the moving limiting rod 7 will also drive the second washer 74 and the protrusion 7. 3. The ball cup rod 42 and the mounting rod 41 are abutted against the inner wall. Since the moving ball cup rod 42 and the mounting rod 41 have a stepped cross section during positioning, the moving limit rod 7 will drive the protrusion 73 to squeeze the second washer 74, so that the second washer 74 deforms and fits against the end of the ball cup rod 42 and the mounting rod 41. Moreover, the gap between the multiple protrusions 73 will also be locked at the corner of the end of the mounting rod 41, thereby increasing the rotation restriction of the limit rod 7, preventing the limit rod 7 and the ball head sleeve rod 44 from rotating inside the ball cup rod 42, and improving the installation stability of the ball head sleeve rod 44.

[0038] To facilitate the deformation of the first gasket 72 and the second gasket 74, and to increase the friction of the two gaskets, both the first gasket 72 and the second gasket 74 are made of soft rubber.

[0039] Example 2:

[0040] Please see Figure 1 - Figure 6 As shown, an adjustable orthopedic locking device includes:

[0041] The telescopic cylinder consists of an intermediate cylinder 1 and a side cylinder 2 slidably connected to the end of the intermediate cylinder 1. The intermediate cylinder 1 is provided with an operation hole 11 and a plurality of positioning holes 12, and a steering column 21 is connected in the side cylinder 2.

[0042] Adjustment component 3 is disposed inside the intermediate cylinder 1 and the side cylinder 2, and is used to adjust the combined length of the intermediate cylinder 1 and the side cylinder 2;

[0043] Adjusting rod 4 is connected to the end of the side tube 2 and includes a mounting rod 41 connected to the end of the side tube 2, a ball cup rod 42 sleeved on the mounting rod 41, and a threaded cylinder 43 threadedly connected to the mounting rod 41. The threaded cylinder 43 is rotatably connected to the ball cup rod 42, and a ball head sleeve rod 44 is movably connected to the end of the ball cup rod 42.

[0044] Pull ring 5 is connected to the end of ball head sleeve 44, and the ball head sleeve 44 is provided with a positioning component. The working distance between the two pull rings 5 ​​can be adjusted by the different extension lengths of the telescopic cylinder.

[0045] As can be seen from the above, by setting up the telescopic cylinder, adjusting component 3, adjusting rod 4 and pull ring 5, when the surgeon needs to place the locking device between two bone screws facing different directions, the operating angle between the pull ring 5 and the telescopic cylinder can be adjusted by adjusting the rod 4. This makes it easier for the user to put the pull ring 5 on the bone screws facing different directions, providing the surgeon with a wider range of bone screw implantation options. It allows the surgeon to implant bone screws at different angles according to implantation needs, without being limited by the traditional locking device structure and having to implant bone screws at the same angle, thus providing more flexible operation.

[0046] When the surgeon establishes a locking device between two bone screws with different orientations, the first step is to rotate the ball head sleeve 44 to change the orientation of the pull ring 5, allowing the pull ring 5 to be fitted onto the bone screw. The positioning component restricts the sliding between the pull ring 5 and the bone screw. Then, rotating the threaded cylinder 43 moves the ball cup rod 42, causing the ball cup rod 42 to lock the ball head of the ball head sleeve 44. The ball cup of the ball cup rod 42 and the end of the mounting rod 41 will clamp the ball head of the ball head sleeve 44. As the friction of the ball head sleeve 44 increases, the ball head sleeve 44 will not rotate at the end of the ball cup rod 42, thus limiting the working angle of the pull ring 5. At this time, the user can adjust the working length of the telescopic cylinder through the adjusting component 3, and apply tension to the pull ring 5 through the telescopic cylinder and the adjusting rod 4, thereby applying tension to the bone screw and helping the patient heal quickly.

[0047] Please see Figure 5 - Figure 6 As shown, the positioning assembly includes a positioning bolt 6 threadedly connected to the pull ring 5 and a limiting rod 7 slidably inserted into the ball head sleeve 44. The end of the positioning bolt 6 is rotatably connected to the limiting rod 7. The limiting rod 7 has a slot 71, and a first washer 72 is fixedly connected to the slot 71. The end of the limiting rod 7 is fixedly connected to a plurality of protrusions 73 and a second washer 74 for wrapping the protrusions 73.

[0048] After the ball cup rod 42 and the mounting rod 41 clamp the end ball of the ball head sleeve rod 44, in order to further improve the connection stability of the ball head sleeve rod 44 and prevent the ball head sleeve rod 44 from rotating inside the ball cup rod 42, the user can rotate the positioning bolt 6. When the positioning bolt 6 moves inside the pull ring 5, it will drive the limiting rod 7 to move. During the movement, the limiting rod 7 will drive the first washer 72 to abut against the bone screw, increasing the friction between the bone screw and the pull ring 5 and preventing the pull ring 5 from sliding on the bone screw. At the same time, the moving limiting rod 7 will also drive the second washer 74 and the protrusion 7. 3. The ball cup rod 42 and the mounting rod 41 are abutted against the inner wall. Since the moving ball cup rod 42 and the mounting rod 41 have a stepped cross section during positioning, the moving limit rod 7 will drive the protrusion 73 to squeeze the second washer 74, so that the second washer 74 deforms and fits against the end of the ball cup rod 42 and the mounting rod 41. Moreover, the gap between the multiple protrusions 73 will also be locked at the corner of the end of the mounting rod 41, thereby increasing the rotation restriction of the limit rod 7, preventing the limit rod 7 and the ball head sleeve rod 44 from rotating inside the ball cup rod 42, and improving the installation stability of the ball head sleeve rod 44.

[0049] To facilitate the deformation of the first gasket 72 and the second gasket 74, and to increase the friction of the two gaskets, both the first gasket 72 and the second gasket 74 are made of soft rubber.

[0050] Please see Figure 2 - Figure 4 As shown, the adjustment assembly 3 includes a mounting cylinder 31 rotatably connected to the intermediate cylinder 1, a slider 32 slidably connected to the mounting cylinder 31, and a spring 33 disposed in the mounting cylinder 31. A plurality of insert rods 34 are fixedly connected to the slider 32. The insert rods 34 are engaged with the positioning hole 12. A cable 36 is wound around the mounting cylinder 31, and the end of the cable 36 is connected to the intermediate cylinder 1 after passing through the steering column 21.

[0051] The spring 33 is pre-compressed, with one end of the spring 33 abutting against the inner wall of the mounting cylinder 31 and the other end abutting against the end of the slider 32.

[0052] As can be seen from the above, after the pull ring 5 is stably fitted onto the bone screw and the angle of action of the pull ring 5 is adjusted, the user can press the slider 32 inward. The slider 32 moves and compresses the spring 33, while also driving the insertion rod 34 to disengage from the positioning hole 12. At this time, the user can rotate the slider 32. As the slider 32 rotates, the two sets of cables 36 gradually wrap around the mounting cylinder 31. At this time, the working length of the cable 36 between the mounting cylinder 31 and the steering column 21 becomes shorter. The side cylinder 2 retracts into the middle cylinder 1 under the action of the cable 36, thereby applying a pulling force to the adjusting rods 4 at both ends. When the pulling force applied by the adjusting rods 4 to the bone screw reaches the preset target, the slider 32 can be released. The compressed spring 33 resets and pushes the slider 32 outward. The slider 32 drives the insertion rod 34 to re-engage in the positioning hole 12. The insertion rod 34 and the positioning hole 12 cooperate with each other to restrict the rotation of the mounting cylinder 31 and maintain the stability of the pulling force of the cable 36.

[0053] To facilitate operation of the slider 32, a rectangular groove 35 is provided on the slider 32. The user can use a four-sided rod or other instrument to insert into the rectangular groove 35 to drive the slider 32 to rotate.

[0054] The positioning holes 12 and the insertion rods 34 are arranged in an equally spaced circular array, and the rotatable insertion rods 34 are inserted into different positioning holes 12.

[0055] The pull ring 5 has semi-circular guide grooves on both sides, and the semi-circular guide grooves are connected to the central hole of the pull ring 5, so that the user can insert the bone nail into the pull ring 5 through the semi-circular guide grooves.

[0056] All standard parts used in this invention can be purchased commercially, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.

[0057] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] The accompanying drawings of the embodiments disclosed in this invention only involve structures relevant to the embodiments disclosed in this invention. Other structures can refer to general designs. Unless otherwise specified, the same embodiment and different embodiments of this invention can be combined with each other.

Claims

1. An adjustable orthopedic locking device, characterized in that, include: The telescopic cylinder consists of an intermediate cylinder (1) and a side cylinder (2) slidably connected to the end of the intermediate cylinder (1). The intermediate cylinder (1) is provided with an operation hole (11) and a plurality of positioning holes (12). A steering column (21) is connected in the side cylinder (2). Adjustment component (3), which is disposed inside the intermediate cylinder (1) and the side cylinder (2), is used to adjust the combined length of the intermediate cylinder (1) and the side cylinder (2); Adjusting rod (4) is connected to the end of the side tube (2), including mounting rod (41) connected to the end of the side tube (2), ball cup rod (42) sleeved on the mounting rod (41) and threaded cylinder (43) threadedly connected to the mounting rod (41). The threaded cylinder (43) is rotatably connected to the ball cup rod (42), and a ball head sleeve rod (44) is movably connected to the end of the ball cup rod (42). A pull ring (5) is connected to the end of a ball head sleeve (44), and a positioning assembly is provided inside the ball head sleeve (44). The positioning assembly includes a positioning bolt (6) threadedly connected to the pull ring (5) and a limiting rod (7) slidably inserted into the ball head sleeve (44). The end of the positioning bolt (6) is rotatably connected to the limiting rod (7). A slot (71) is provided on the limiting rod (7). A first washer (72) is fixedly connected to the slot (71). A plurality of protrusions (73) and a second washer (74) for wrapping the protrusions (73) are fixedly connected to the end of the limiting rod (7).

2. The adjustable orthopedic locking device according to claim 1, characterized in that: Both the first gasket (72) and the second gasket (74) are soft rubber gaskets.

3. The adjustable orthopedic locking device according to claim 1, characterized in that: The adjustment assembly (3) includes a mounting cylinder (31) rotatably connected to the intermediate cylinder (1), a slider (32) slidably connected to the mounting cylinder (31), and a spring (33) disposed in the mounting cylinder (31). A plurality of insert rods (34) are fixedly connected to the slider (32). The insert rods (34) are engaged with the positioning hole (12). A cable (36) is wound around the mounting cylinder (31), and the end of the cable (36) is connected to the intermediate cylinder (1) after passing through the steering column (21).

4. An adjustable orthopedic locking device according to claim 3, characterized in that: The spring (33) is pre-compressed, with one end of the spring (33) abutting against the inner wall of the mounting cylinder (31) and the other end abutting against the end of the slider (32).

5. An adjustable orthopedic locking device according to claim 3, characterized in that: The slider (32) has a rectangular groove (35).

6. An adjustable orthopedic locking device according to claim 3, characterized in that: The positioning holes (12) and the insertion rods (34) are arranged in an equally spaced circular array.

7. An adjustable orthopedic locking device according to claim 1, characterized in that: The pull ring (5) has semi-circular guide grooves on both sides, and the semi-circular guide grooves are connected to the central hole of the pull ring (5).

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