Device for simulating mechanical shafts at far end and near end of broken bone

Abstract

The utility model relates to the technical field of fracture reduction experiments, and provides a device for simulating mechanical shafts at the far end and the near end of a broken bone, which comprises two fixing supports, a plurality of groups of mounting holes are formed in one surfaces, close to each other, of the two fixing supports, and a plurality of connecting shafts are mounted in the mounting holes formed in the surfaces of the fixing supports. A plurality of adjusting rods are rotationally connected among the plurality of connecting shafts; a simulation mechanism is arranged between the two fixing supports, the adjusting rod is used for supporting and adjusting the relation between the two fixing supports, the simulation mechanism comprises a mounting plate, the mounting plate is movably connected to the outer side walls of the fixing supports, and positioning bolts are mounted between the fixing supports and the mounting plate; by designing a reusable simulation device, multiple groups of fracture malformation cases can be generated by using a single group of device, and the requirement that multiple bone samples need to be collected or 3D printing models need to be prepared again in each test is avoided, so that the experiment cost is remarkably saved.

Description

Technical Field

[0001] The utility model relates to the technical field of fracture reduction experiments, in particular to a device for simulating the mechanical axis of the distal and proximal ends of a broken bone. Background Art

[0002] In current fracture reduction device testing, commonly used testing methods rely on real bones or 3D-printed bone models to evaluate the accuracy of reduction devices. While this testing method can realistically simulate fracture conditions, it has several significant shortcomings in actual operation.

[0003] First, when using real bones for testing, the scarcity and non-renewability of bones make the experiments expensive and difficult to apply on a large scale. At the same time, each experiment may cause irreversible damage to the bone samples, limiting their possibility of reuse. On the other hand, if 3D-printed bone models are used for testing, although they can be mass-produced, auxiliary tools such as Kirschner wires and bone screws are usually required during the model installation process. Drilling holes in the model will further damage the model structure, and each experiment can only simulate one fixed fracture posture. If the reduction accuracy of different fracture postures needs to be tested, a new fracture model must be prepared, which undoubtedly increases the complexity and cost of the experiment.

[0004] Secondly, existing testing methods are prone to introducing human error when measuring the mechanical axis. In fracture reduction experiments, restoring the mechanical axis is a key criterion for evaluating reduction effectiveness. However, because the measurement of the mechanical axis often relies on the operator's subjective judgment and experience, certain errors are unavoidable in practice. These errors not only affect the accurate assessment of the reduction device but can also mislead subsequent improvements and optimization efforts.

[0005] In summary, existing technologies for experimental testing of fracture reduction devices present challenges such as difficulty reusing bone samples, difficulty adjusting fracture posture, and the susceptibility of mechanical axis measurement to human error. To address these issues, the present invention proposes a device for simulating the distal and proximal mechanical axes of a fractured bone. This innovative approach aims to overcome these shortcomings and improve the efficiency and accuracy of fracture reduction device testing.

[0006] To this end, those skilled in the art have proposed a device for simulating the mechanical axes of the distal and proximal ends of a broken bone to solve the problems raised in the background art. Utility Model Content

[0007] In order to solve the above technical problems, the present invention provides a device for simulating the mechanical axes of the distal and proximal ends of a broken bone, so as to solve the problems of the fracture reduction device in the prior art, such as the model being easily damaged and the posture being difficult to adjust during use.

[0008] A device for simulating mechanical axes at the distal and proximal ends of a broken bone, comprising two fixing brackets, each having a plurality of mounting holes formed on one side of the fixing brackets adjacent to the other, a plurality of connecting shafts being mounted in the mounting holes formed on the surfaces of the fixing brackets, and a plurality of adjusting rods being rotatably connected between the connecting shafts;

[0009] A simulation mechanism is provided between the two fixing brackets.

[0010] Preferably, the adjustment rod is used to support and adjust the relationship between the two fixed brackets.

[0011] Preferably, the simulation mechanism includes a mounting plate, which is movably connected to the outer wall of the fixed bracket, and a positioning bolt is installed between the fixed bracket and the mounting plate. The positioning bolt is used to limit the mounting plate to the side wall of the fixed bracket, and an adjustment hole is opened at the top of the mounting plate.

[0012] Preferably, the positioning bolts pass through the adjustment holes to limit the mounting plate. The adjustment holes are in multiple arrangement and are located at the top of the mounting plate. The position of the mounting plate can be adjusted by adjusting the relationship between the adjustment holes and the positioning bolts.

[0013] Preferably, the outer wall of the mounting plate is fixedly connected to a limiting sleeve, the top of the limiting sleeve is threadedly connected to a positioning adjustment rod, the inner wall of the limiting sleeve is rotatably connected to a universal ball shaft, the bottom end of the universal ball shaft is fixedly connected to a simulation rod, and the outer wall of the simulation rod is installed with an axial angle marker.

[0014] Preferably, a connecting screw hole is opened on the side wall of the limiting sleeve, an adjusting screw is threadedly connected to the inner side wall of the connecting screw hole, a positioning plate is rotatably connected to the outer side wall of the adjusting screw, and the other end of the adjusting screw is fixedly connected to a connecting handle.

[0015] Preferably, the positioning adjustment rod is engaged with the universal ball joint inside the limiting sleeve through the limiting sleeve. The positioning plate is movably connected with the universal ball joint and limits the universal ball joint.

[0016] Preferably, the simulation rod at the top simulates the state of the proximal end of the fracture, and the simulation rod at the bottom simulates the state of the distal end of the fracture.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Save experimental costs: By designing a reusable simulation device, a single device can be used to generate multiple sets of fracture and deformity cases, avoiding the need to collect multiple bone samples or re-prepare 3D printed models for each test, thereby significantly saving experimental costs.

[0019] 2. Improved Measurement Accuracy: By using a steel cylinder to simulate the mechanical axis of the proximal and distal ends of the fracture, the device of the present invention facilitates accurate measurement, effectively avoiding the human error that can be introduced when measuring the mechanical axis of a real bone model or a 3D-printed model. This facilitates more precise evaluation of the reduction accuracy of fracture reduction devices.

[0020] 3. Provides axial angulation markers: The universal ball joint and steel column designed into the device not only simulate fractures but also provide axial angulation markers, making the measurement of axial angulation more convenient and accurate. Compared with the commonly used clinical method of visual observation, this design allows for a more objective assessment of axial deformity, improving the accuracy of diagnosis and treatment.

[0021] 4. High Flexibility: By adjusting the universal ball joint, the angle and displacement between the proximal and distal ends of the fracture can be easily changed, allowing for rapid acquisition of a variety of fracture deformity cases to meet diverse testing needs. This high degree of flexibility improves experimental efficiency, enabling researchers to collect more comprehensive data in a shorter time.

[0022] 5. Wide application: This device can be installed on various fracture reduction devices such as external fixators and fracture reduction robots. It is suitable for various scenarios such as fracture reduction device testing experiments and system error measurement experiments, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 For this utility model Figure 1 Schematic diagram of the structure of the simulation mechanism;

[0025] Figure 3 For this utility model Figure 2 Schematic diagram of the explosion structure of the middle limit sleeve;

[0026] Figure 4 For this utility model Figure 2 Schematic diagram of the side view structure in.

[0027] In the figure: 1. Fixed bracket; 11. Mounting hole; 12. Connecting shaft; 13. Adjusting rod; 2. Mounting plate; 21. Positioning bolt; 22. Limit sleeve; 23. Positioning adjustment rod; 24. Universal ball joint; 25. Simulation rod; 26. Axis angle marker; 27. Connecting screw hole; 28. Adjusting screw; 29. Connecting handle; 210. Positioning plate; 211. Adjusting hole arrangement. DETAILED DESCRIPTION

[0028] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] As attached Figure 1 To the attached Figure 4 As shown:

[0030] Example 1: The present invention provides a device for simulating the mechanical axis of the distal and proximal ends of a broken bone, comprising two fixing brackets 1, each of the fixing brackets 1 having a plurality of mounting holes 11 formed on one side thereof, wherein a plurality of connecting shafts 12 are mounted in the mounting holes 11 formed on the surface of the fixing brackets 1, and a plurality of adjusting rods 13 are rotatably connected between the plurality of connecting shafts 12;

[0031] A simulation mechanism is provided between the two fixed brackets 1; the adjusting rod 13 is used to support and adjust the relationship between the two fixed brackets 1, and the simulation mechanism includes a mounting plate 2, the mounting plate 2 is movably connected to the outer wall of the fixed bracket 1, and a positioning bolt 21 is installed between the fixed bracket 1 and the mounting plate 2, and the positioning bolt 21 is used to limit the mounting plate 2 to the side wall of the fixed bracket 1, and the top of the mounting plate 2 is provided with an adjustment row hole 211, and the positioning bolt 21 passes through the adjustment row hole 211 to limit the mounting plate 2. The adjustment row hole 211 is provided in multiple rows at the top of the mounting plate 2, and the position of the mounting plate 2 can be adjusted by adjusting the relationship between the adjustment row hole 211 and the positioning bolt 21, and the outer wall of the mounting plate 2 is fixedly connected to the limiting sleeve 22, and the top end of the limiting sleeve 22 is threadedly connected to the positioning adjustment rod 23, and the inner side wall of the limiting sleeve 22 is rotatably connected to the universal ball shaft 24, and the bottom end of the universal ball shaft 24 is fixedly connected to the simulation rod 25.

[0032] Specifically, by disposing the universal ball joint 24 in the limiting sleeve 22 , the angle of the universal ball joint 24 can be adjusted in the limiting sleeve 22 , and the simulation experiment can be performed after the angle is adjusted to a suitable angle.

[0033] Example 2: The outer wall of the simulation rod 25 is mounted with an axial angulation marker 26. The side wall of the limiting sleeve 22 is provided with a connecting screw hole 27. The inner wall of the connecting screw hole 27 is threadedly connected to an adjusting screw 28. The outer wall of the adjusting screw 28 is rotatably connected to a positioning plate 210. The other end of the adjusting screw 28 is fixedly connected to a connecting handle 29. The positioning adjustment rod 23 is engaged with the universal ball shaft 24 inside the limiting sleeve 22 through the limiting sleeve 22. The positioning plate 210 is movably connected to the universal ball shaft 24 and limits the universal ball shaft 24. The top simulation rod 25 simulates the state of the proximal end of the fracture, while the bottom simulation rod 25 simulates the state of the distal end of the fracture.

[0034] Specifically, by setting the connecting handle 29 , the positioning plate 210 can be connected to the universal ball shaft 24 to limit the universal ball shaft 24 .

[0035] Working Principle: 1. Install the device: Secure the simulation device to the fixed bracket 1 using the positioning bolts 21. Ensure that the device is stable and will not shift or loosen during the reduction process. Adjust the position of the simulation rod 25 and the universal ball shaft 24 to simulate common fracture deformity cases in clinical practice.

[0036] 2. Adjust the fracture posture:

[0037] Loosen the universal ball shaft 24 at both ends and manually adjust the angle and displacement between the proximal and distal ends of the fracture to simulate different fracture conditions. After the adjustment is completed, lock the universal ball shaft through the positioning adjustment rod 23 and the connecting handle 29 to ensure the stability of the fracture posture.

[0038] 3. Reset operation:

[0039] According to the clinical diagnosis and treatment process, the two ends of the simulated fracture were reduced using the fixation bracket 1. During the reduction process, various parameters such as reduction force and reduction time were carefully observed and recorded.

[0040] 4. Error measurement:

[0041] Use a high-precision measuring instrument (such as an X-ray machine, CT scanner, etc.) to scan the fracture model after reduction and measure the reduction error. Record and analyze the measurement results to evaluate the reduction accuracy and system error of the fixation bracket 1.

[0042] 5. Repeat the test:

[0043] Repeat steps 2 to 4 to obtain multiple sets of systematic error data for the fixation bracket 1 by adjusting different fracture postures. Analyze these data to identify the key factors affecting reduction accuracy, and improve and optimize the bracket accordingly.

[0044] All standard parts used in this utility model can be purchased commercially, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, etc. that are mature in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology. In addition, the circuit connections adopt conventional connection methods in the existing technology and will not be described in detail here. Any matters not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

[0045] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. "Multiple" means two or more, unless otherwise specifically defined.

[0046] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0047] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of different embodiments or examples described in this specification without contradiction.

[0049] In the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone, characterized in that: The invention comprises two fixing brackets (1), wherein a plurality of mounting holes (11) are provided on a side of the two fixing brackets (1) close to each other, a plurality of connecting shafts (12) are installed in the mounting holes (11) provided on the surface of the fixing brackets (1), and a plurality of adjusting rods (13) are rotatably connected between the plurality of connecting shafts (12); A simulation mechanism is provided between the two fixed brackets (1).

2. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone according to claim 1, characterized in that: The adjusting rod (13) is used to support and adjust the relationship between the two fixed brackets (1).

3. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone according to claim 1, characterized in that: The simulation mechanism comprises a mounting plate (2), the mounting plate (2) being movably connected to the outer side wall of the fixed bracket (1), a positioning bolt (21) being installed between the fixed bracket (1) and the mounting plate (2), the positioning bolt (21) being used to limit the mounting plate (2) to the side wall of the fixed bracket (1), and an adjustment hole (211) being provided at the top end of the mounting plate (2).

4. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone as claimed in claim 3, characterized in that: The positioning bolts (21) penetrate the adjustment holes (211) to limit the mounting plate (2). The adjustment holes (211) are multiple and are opened at the top of the mounting plate (2). The position of the mounting plate (2) can be adjusted by adjusting the relationship between the adjustment holes (211) and the positioning bolts (21).

5. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone according to claim 4, characterized in that: The outer side wall of the mounting plate (2) is fixedly connected to a limiting sleeve (22), the top end of the limiting sleeve (22) is threadedly connected to a positioning adjustment rod (23), the inner side wall of the limiting sleeve (22) is rotatably connected to a universal ball shaft (24), the bottom end of the universal ball shaft (24) is fixedly connected to a simulation rod (25), and the outer side wall of the simulation rod (25) is installed with an axial angle marker (26).

6. A device for simulating the mechanical axis of the distal and proximal ends of a broken bone according to claim 5, characterized in that: The side wall of the limiting sleeve (22) is provided with a connecting screw hole (27), the inner side wall of the connecting screw hole (27) is threadedly connected to an adjusting screw (28), the outer side wall of the adjusting screw (28) is rotatably connected to a positioning plate (210), and the other end of the adjusting screw (28) is fixedly connected to a connecting handle (29).

7. A device for simulating the mechanical axes of the distal and proximal ends of a broken bone according to claim 6, characterized in that: The positioning adjustment rod (23) is engaged with the universal ball joint (24) inside the limiting sleeve (22) through the limiting sleeve (22); the positioning plate (210) is movably connected to the universal ball joint (24) and limits the universal ball joint (24).

8. A device for simulating the mechanical axes of the distal and proximal ends of a broken bone as claimed in claim 7, characterized in that: The simulation rod (25) at the top is a simulation state of the proximal end of the fracture, and the simulation rod (25) at the bottom is a simulation state of the distal end of the fracture.

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