Device for testing disengagement of interbody fusion cage

Abstract

The utility model discloses an interbody fusion cage disengagement testing device, and particularly relates to the technical field of medical instrument testing, the interbody fusion cage disengagement testing device comprises a U-shaped supporting frame, a supporting frame is fixedly arranged on one side of the U-shaped supporting frame, an adjusting mechanism is arranged in the U-shaped supporting frame, and the adjusting mechanism comprises a stepping motor fixedly arranged on one side of the U-shaped supporting frame; a rotating rod is fixedly arranged at the output end of the stepping motor, a first fixing plate is fixedly arranged at one end of the rotating rod, a second fixing plate is rotationally arranged on the inner wall of the U-shaped supporting frame, and first electric telescopic rods are fixedly arranged on one side of the first fixing plate and one side of the second fixing plate correspondingly. According to the utility model, the interbody fusion cage of different specifications can be stably and properly clamped, the real implantation state can be simulated, the angle of the fixing plate can be flexibly adjusted, different test angle requirements can be met, the test comprehensiveness is improved, and the test precision and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument test technical field more specifically, the utility model relates to an intervertebral fusion cage escape test device. BACKGROUND

[0002] The intervertebral fusion cage is a commonly used implant in spinal surgery, used to restore intervertebral height, maintain spinal stability and promote intervertebral bone fusion, however, in the actual use process, there is a risk of intervertebral fusion cage escape, which can cause serious complications such as nerve damage, pain, etc. In order to evaluate the escape performance of the intervertebral fusion cage, it needs to be tested.

[0003] Through the search, the authorized publication number CN116380429A of Chinese patent discloses a fusion cage push-out test device and test method, the experimental method of the structure can determine the stress value of the postoperative fusion cage escape phenomenon, and the use matters needing attention are clear, the performance data and practical support are provided, moreover, the test device structure is simple, small in size, strong in adaptability, can effectively measure the experimental results and guarantee the precision, secondly, the clamping mechanism can fix the position of the fusion cage and adjust the force value to simulate the different stress conditions of the fusion cage in the horizontal direction of the human body, furthermore, the embedded connection of the horizontal fixing block and the connecting device is strong in stability, limits the degree of freedom, is uniform in stress, the force transmitted to the fusion cage is stable, the connecting device and the fusion cage structure can be replaced, the connecting device simulates the bone structure, and the two are connected as a whole under the horizontal force, and are strong in flexibility and applicability.

[0004] However, the clamping mechanism can fix the position of the fusion cage and adjust the force value, which can only ensure the fixation and stress simulation of the fusion cage in the horizontal direction, and cannot realize the test of the fusion cage at different inclined angles, thereby affecting the use effect. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides an intervertebral fusion cage escape test device to solve the problems in the above background art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] An intervertebral fusion cage escape test device, comprising a U-shaped support frame, a support frame is fixedly arranged on one side of the U-shaped support frame, and an adjusting mechanism is arranged in the U-shaped support frame.

[0008] The adjusting mechanism comprises a stepping motor fixedly arranged on one side of the U-shaped support frame, an output end of the stepping motor is fixedly provided with a rotating rod, one end of the rotating rod is fixedly provided with a first fixed plate, and a second fixed plate is rotatably arranged on the inner wall of the U-shaped support frame.

[0009] The first fixed plate and the second fixed plate are fixedly provided with a first electric telescopic rod on one side, the output end of the first electric telescopic rod is fixedly provided with a stabilizing plate, the inside of the stabilizing plate is insertedly provided with a polyurethane block, and the surfaces of the stabilizing plate and the polyurethane block are both provided with a U-shaped insertion block.

[0010] The first fixed plate and the second fixed plate are provided in an L-shaped cross section, the U-shaped insertion block and the stabilizing plate are connected through a bolt, the surface of the stabilizing plate is provided with a plurality of guide grooves, and the inside of the guide grooves is insertedly provided with a guide column.

[0011] By adopting the above technical scheme: the U-shaped support frame cooperates with the support frame to build a stable device foundation, guaranteeing the stability of the overall structure during the test process, reducing the influence of external interference on the test results, realizing stable and appropriate clamping of different specifications of intervertebral fusion cages, simulating the real implantation state, and improving the test precision and reliability.

[0012] As a further description of the above technical scheme: one side of the support frame is provided with a test mechanism, the test mechanism includes a plurality of second electric telescopic rods fixedly arranged on one side of the support frame, the output end of the second electric telescopic rod is fixedly provided with a stabilizing frame, the top of the stabilizing frame is fixedly provided with a plurality of protruding blocks, the inside of the rotating rod is slidably provided with a guide rod, and one end of the guide rod is fixedly provided with a limiting disc.

[0013] One side of the stabilizing frame is fixedly provided with a small stepping motor, the output end of the small stepping motor is fixedly provided with a threaded rod, the outside of the threaded rod is threadedly connected with a T-shaped threaded sleeve, and the T-shaped threaded sleeve is slidably connected with the stabilizing frame.

[0014] By adopting the above technical scheme: the position of the stabilizing frame can be flexibly and accurately adjusted, so that it can accurately correspond to part of the fixed intervertebral fusion cage, guaranteeing the accuracy of the test position, and the horizontal position of the T-shaped threaded sleeve on the stabilizing frame can be finely adjusted, thereby accurately adjusting the position of the component connected with the T-shaped threaded sleeve, so that the pressure is more accurately applied to the intervertebral fusion cage, improving the precision and reliability of the test.

[0015] As a further description of the above technical scheme: one side of the T-shaped threaded sleeve is fixedly provided with a hydraulic cylinder, the output end of the hydraulic cylinder is fixedly provided with a pressurizing head, and one end of the pressurizing head is fixedly embedded with a pressure sensor.

[0016] One side of the U-shaped support frame is fixedly provided with a display instrument, and one side of the display instrument is fixedly provided with a controller.

[0017] By adopting the above technical solution, continuous and controllable pressure can be provided to the interbody fusion device, simulating the pressure it experiences in the human body, ensuring the authenticity of the test conditions. The display can intuitively show the data detected by the pressure sensor, making it convenient for operators to observe and record in real time and keep track of the test progress.

[0018] The technical effects and advantages of this utility model are as follows:

[0019] 1. By setting up an adjustment mechanism, compared with existing technologies, polyurethane blocks are used to simulate the characteristics of human vertebrae, providing a near-realistic environment for testing and making the test results more valuable. The polyurethane blocks are connected to the fixing plate through U-shaped inserts and bolts. The stabilizing plate, together with the guide column, ensures the stability of the installation and the smoothness of the movement, ensuring the stability of the intervertebral fusion device position during the test. The first electric telescopic rod can adjust the spacing of the polyurethane blocks, which can adapt to different sizes of intervertebral fusion devices, achieve stable and appropriate clamping, and accurately simulate the installation state. Moreover, the stepper motor drives the rotating rod and the first fixing plate to rotate. Combined with the rotation setting of the second fixing plate, the angle position of the first fixing plate and the second fixing plate can be effectively adjusted, which facilitates multi-angle testing of the polyurethane blocks and the intervertebral fusion device.

[0020] 2. By setting up a testing mechanism, compared with existing technologies, the second electric telescopic rod can flexibly adjust the position of the stabilizing frame to correspond with the adjustment mechanism of the fixed intervertebral fusion device, ensuring the accuracy and specificity of the test. The small stepper motor, together with the threaded rod and T-shaped threaded sleeve, can precisely adjust the horizontal position of the hydraulic cylinder and the pressure head, ensuring that the pressure is accurately applied to the intervertebral fusion device. The hydraulic cylinder pushes the pressure head to apply pressure, and the pressure sensor detects and transmits data in real time. The display shows the data in real time, which allows the operator to intuitively grasp the pressure changes, achieve precise control, and record the pressure value when the intervertebral fusion device dislocates, providing a quantitative basis for evaluating its anti-dislocation performance, making the test results more scientific and reliable, and the operation process precise and easy to control. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the overall front view of the present invention.

[0023] Figure 3 This is a schematic diagram of the adjustment mechanism of this utility model.

[0024] Figure 4 This is a schematic diagram of the testing mechanism structure of this utility model.

[0025] Figure 5 This is a schematic diagram of the overall side cross-sectional structure of this utility model.

[0026] Figure 6 This is a schematic diagram of the overall system structure of this utility model.

[0027] The attached figures are labeled as follows: 1. U-shaped support frame; 2. Support frame; 3. Stepper motor; 4. Rotating rod; 5. First fixing plate; 6. Second fixing plate; 7. First electric telescopic rod; 8. Stabilizing plate; 9. Polyurethane block; 10. U-shaped insert; 11. Guide column; 12. Second electric telescopic rod; 13. Stabilizing frame; 14. Protrusion block; 15. Guide rod; 16. Small stepper motor; 17. Threaded rod; 18. T-shaped threaded sleeve; 19. Hydraulic cylinder; 20. Pressure head; 21. Pressure sensor; 22. Display instrument; 23. Controller. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] The embodiments disclosed in this application are as follows: Figures 1-6 The interbody fusion cage prolapse testing device shown includes a U-shaped support frame 1, a support frame 2 fixedly installed on one side of the U-shaped support frame 1, and an adjustment mechanism installed inside the U-shaped support frame 1.

[0030] The adjustment mechanism includes a stepper motor 3 fixedly mounted on one side of the U-shaped support frame 1, a rotating rod 4 fixedly mounted on the output end of the stepper motor 3, a first fixing plate 5 fixedly mounted on one end of the rotating rod 4, and a second fixing plate 6 rotatably mounted on the inner wall of the U-shaped support frame 1.

[0031] A first electric telescopic rod 7 is fixedly installed on one side of the first fixed plate 5 and the second fixed plate 6. A stabilizing plate 8 is fixedly installed at the output end of the first electric telescopic rod 7. A polyurethane block 9 is inserted into the inside of the stabilizing plate 8. U-shaped inserts 10 are opened on the surface of the stabilizing plate 8 and the polyurethane block 9.

[0032] The cross-section of the first fixing plate 5 and the second fixing plate 6 is L-shaped. The U-shaped insert 10 is connected to the stabilizing plate 8 by bolts. The surface of the stabilizing plate 8 is provided with multiple guide grooves, and guide posts 11 are inserted into the inside of the guide grooves.

[0033] The intervertebral fusion device to be tested is placed between two polyurethane blocks 9, using the polyurethane blocks 9 to simulate some characteristics of human vertebrae.

[0034] Because both the surface of the stabilizing plate 8 and the polyurethane block 9 are provided with U-shaped inserts 10, the polyurethane block 9 is fixed to the stabilizing plate 8 by bolting the U-shaped inserts 10 to the stabilizing plate 8. The surface of the stabilizing plate 8 is provided with multiple guide grooves, and guide posts 11 are inserted into the inside of the guide grooves. The guide posts 11 play a stabilizing and guiding role, ensuring the stability of the stabilizing plate 8 during the movement process.

[0035] Next, the controller 23 controls the extension and retraction of the first electric telescopic rod 7, which can adjust the position of the stabilizing plate 8, thereby adjusting the distance between the two polyurethane blocks 9, so that the intervertebral fusion device is stably and properly clamped between the two polyurethane blocks 9, simulating the installation state of the intervertebral fusion device in the human intervertebral space.

[0036] Then, the controller 23 controls the stepper motor 3. The output end of the stepper motor 3 drives the rotating rod 4 to rotate, and the rotating rod 4 drives the first fixed plate 5 to rotate. At this time, the first fixed plate 5 is connected to the stepper motor 3 through the rotating rod 4. The stepper motor 3 is fixedly set on one side of the U-shaped support frame 1, and the second fixed plate 6 is rotatably set on the inner wall of the U-shaped support frame 1, thereby effectively driving the first fixed plate 5 and the second fixed plate 6 to rotate, which facilitates the angle and position adjustment of the polyurethane block 9 and the intervertebral fusion device.

[0037] Reference Figures 2-4 As shown, a testing mechanism is provided on one side of the support frame 2. The testing mechanism includes multiple second electric telescopic rods 12 fixedly installed on one side of the support frame 2. A stabilizing frame 13 is fixedly installed at the output end of the second electric telescopic rod 12. Multiple protrusions 14 are fixedly installed on the top of the stabilizing frame 13. A guide rod 15 is slidably installed inside the rotating rod 4. A limit plate is fixedly installed at one end of the guide rod 15.

[0038] A small stepper motor 16 is fixedly installed on one side of the stabilizing frame 13. A threaded rod 17 is fixedly installed at the output end of the small stepper motor 16. A T-shaped threaded sleeve 18 is connected to the external thread of the threaded rod 17. The T-shaped threaded sleeve 18 is slidably connected to the stabilizing frame 13.

[0039] The controller 23 controls the extension and retraction of multiple second electric telescopic rods 12 to adjust the position between the stabilizing frame 13 and the U-shaped support frame 1. Multiple protrusions 14 are fixedly installed on the top of the stabilizing frame 13. A guide rod 15 is slidably installed inside the rotating rod 4. A limit plate is fixedly installed at one end of the guide rod 15. The adjustment of the second electric telescopic rods 12 ensures that the stabilizing frame 13 is in a suitable test position, corresponding to the adjustment mechanism of the fixed intervertebral fusion device.

[0040] Then, the controller 23 controls the small stepper motor 16, which can adjust the horizontal position of the T-shaped threaded sleeve 18 on the stabilizing frame 13 through the cooperation of the threaded rod 17 and the T-shaped threaded sleeve 18, thereby adjusting the horizontal position of the hydraulic cylinder 19 and the pressure head 20 so that they are aligned with the intervertebral fusion device.

[0041] Reference Figure 1 , 4 As shown in Figure 5, a hydraulic cylinder 19 is fixedly installed on one side of the T-shaped threaded sleeve 18, a pressure head 20 is fixedly installed at the output end of the hydraulic cylinder 19, and a pressure sensor 21 is fixedly embedded at one end of the pressure head 20.

[0042] A display 22 is fixedly installed on one side of the U-shaped support frame 1, and a controller 23 is fixedly installed on one side of the display 22.

[0043] After all components are adjusted to the appropriate position, the controller 23 controls the hydraulic cylinder 19. The output end of the hydraulic cylinder 19 pushes the pressure head 20 to apply pressure to the intervertebral fusion device. One end of the pressure head 20 is fixedly embedded with a pressure sensor 21, which detects the pressure applied to the intervertebral fusion device in real time.

[0044] During the application of pressure, observe the interbody fusion device until it comes out from between the two polyurethane blocks 9. If the interbody fusion device comes out, record the pressure value detected by the pressure sensor 21 at this time. This value is the release pressure of the interbody fusion device.

[0045] The pressure sensor 21 transmits the detected pressure data to the display 22, which is fixedly mounted on one side of the U-shaped support frame 1. The display 22 displays the pressure value in real time, enabling precise control and operation of the testing process.

[0046] Working principle of this utility model:

[0047] This utility model is a test device for intervertebral fusion device dislodgement. When using the device, the intervertebral fusion device to be tested is placed between two polyurethane blocks 9, and the polyurethane blocks 9 are used to simulate some characteristics of human vertebrae.

[0048] Because both the surface of the stabilizing plate 8 and the polyurethane block 9 are provided with U-shaped inserts 10, the polyurethane block 9 is fixed on the stabilizing plate 8 by bolting the U-shaped inserts 10 to the stabilizing plate. The surface of the stabilizing plate 8 is provided with multiple guide grooves, and guide posts 11 are inserted into the inside of the guide grooves. The guide posts 11 play a stabilizing and guiding role, ensuring the stability of the stabilizing plate 8 during the movement process.

[0049] Next, the controller 23 controls the extension and retraction of the first electric telescopic rod 7, which can adjust the position of the stabilizing plate 8, thereby adjusting the distance between the two polyurethane blocks 9, so that the intervertebral fusion device is stably and properly clamped between the two polyurethane blocks 9, simulating the installation state of the intervertebral fusion device in the human intervertebral space.

[0050] Then the controller 23 controls the stepper motor 3. The output end of the stepper motor 3 drives the rotating rod 4 to rotate, and the rotating rod 4 drives the first fixed plate 5 to rotate. At this time, the first fixed plate 5 is connected to the stepper motor 3 through the rotating rod 4. The stepper motor 3 is fixedly set on one side of the U-shaped support frame 1, and the second fixed plate 6 is rotatably set on the inner wall of the U-shaped support frame 1, thereby effectively driving the first fixed plate 5 and the second fixed plate 6 to rotate, which facilitates the angle and position adjustment of the polyurethane block 9 and the intervertebral fusion device.

[0051] After adjustment, the controller 23 controls the extension and retraction of multiple second electric telescopic rods 12 to adjust the position between the stabilizing frame 13 and the U-shaped support frame 1. Multiple protrusions 14 are fixedly installed on the top of the stabilizing frame 13. A guide rod 15 is slidably installed inside the rotating rod 4. A limit plate is fixedly installed at one end of the guide rod 15. The adjustment of the second electric telescopic rods 12 ensures that the stabilizing frame 13 is in a suitable test position, corresponding to the adjustment mechanism of the fixed intervertebral fusion device.

[0052] Then the controller 23 controls the small stepper motor 16, which can adjust the horizontal position of the T-shaped threaded sleeve 18 on the stabilizing frame 13 through the cooperation of the threaded rod 17 and the T-shaped threaded sleeve 18, thereby adjusting the horizontal position of the hydraulic cylinder 19 and the pressure head 20 so that they are aligned with the intervertebral fusion device.

[0053] After all components are adjusted to the appropriate position, the controller 23 controls the hydraulic cylinder 19. The output end of the hydraulic cylinder 19 pushes the pressure head 20 to apply pressure to the intervertebral fusion device, so that the pressure head 20 contacts the intervertebral fusion device. One end of the pressure head 20 is fixedly embedded with a pressure sensor 21, which detects the pressure applied to the intervertebral fusion device in real time.

[0054] During the application of pressure, observe the interbody fusion device until it comes out from between the two polyurethane blocks 9. If the interbody fusion device comes out, record the pressure value detected by the pressure sensor 21 at this time. This value is the release pressure of the interbody fusion device.

[0055] Pressure sensor 21 transmits the detected pressure data to display 22. Display 22 is fixedly mounted on one side of the U-shaped support frame 1 and displays the pressure value in real time, enabling precise control and operation of the testing process. The pressure sensor 21 is an HBM50kN type pressure sensor, the display 22 is a TPC7062K type touch screen display, and the controller 23 is a Siemens S7-1200 series PLC controller. These are existing technologies and will not be described in detail in this technical solution.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An intervertebral cage escape test device comprising a U-shaped support frame (1), characterized in that: One side of the U-shaped support frame (1) is fixedly provided with a support frame (2), and the inside of the U-shaped support frame (1) is provided with an adjusting mechanism; The adjusting mechanism comprises a stepping motor (3) fixedly arranged on one side of the U-shaped support frame (1), an output end of the stepping motor (3) is fixedly provided with a rotating rod (4), one end of the rotating rod (4) is fixedly provided with a first fixed plate (5), and the inner wall of the U-shaped support frame (1) is rotatably provided with a second fixed plate (6); One side of the first fixed plate (5) and the second fixed plate (6) is fixedly provided with a first electric telescopic rod (7), an output end of the first electric telescopic rod (7) is fixedly provided with a stabilizing plate (8), the inside of the stabilizing plate (8) is inserted with a polyurethane block (9), and the surfaces of the stabilizing plate (8) and the polyurethane block (9) are provided with U-shaped insertion blocks (10).

2. The intervertebral cage ejection test device of claim 1, wherein: The first fixed plate (5) and the second fixed plate (6) are provided with an L-shaped cross section, the U-shaped insertion blocks (10) and the stabilizing plate (8) are connected through bolts, a plurality of guide grooves are formed in the surface of the stabilizing plate (8), and a guide column (11) is inserted in the guide grooves.

3. The intervertebral fusion cage ejection test device of claim 1, wherein: One side of the support frame (2) is provided with a test mechanism, the test mechanism comprises a plurality of second electric telescopic rods (12) fixedly arranged on one side of the support frame (2), an output end of the second electric telescopic rod (12) is fixedly provided with a stabilizing frame (13), a plurality of convex blocks (14) are fixedly arranged on the top of the stabilizing frame (13), a guide rod (15) is slidably arranged in the rotating rod (4), and a limiting disc is fixedly arranged at one end of the guide rod (15).

4. The intervertebral cage ejection test device of claim 3, wherein: One side of the stabilizing frame (13) is fixedly provided with a small stepping motor (16), an output end of the small stepping motor (16) is fixedly provided with a threaded rod (17), the threaded rod (17) is threadedly connected with a T-shaped threaded sleeve (18), and the T-shaped threaded sleeve (18) is slidably connected with the stabilizing frame (13).

5. The intervertebral cage escape testing device of claim 4, wherein: One side of the T-shaped threaded sleeve (18) is fixedly provided with a hydraulic cylinder (19), an output end of the hydraulic cylinder (19) is fixedly provided with a pressurizing head (20), and one end of the pressurizing head (20) is fixedly embedded with a pressure sensor (21).

6. The intervertebral fusion cage ejection test device of claim 1, wherein: One side of the U-shaped support frame (1) is fixedly provided with a display instrument (22), and one side of the display instrument (22) is fixedly provided with a controller (23).

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