Orthopedic external fixator mechanical analysis experimental device

Abstract

The utility model discloses a mechanical analysis experiment device for an orthopedic external fixator, which relates to the technical field of fixator detection and comprises a holding handle, a cross-shaped support, a rubber detection head and an external expansion pressure detection mechanism. An external expansion pressure detection mechanism extending to the outer side is arranged in the holding handle, the external expansion pressure detection mechanism is movably connected with the cross-shaped support, and a rubber detection head is installed on the outer side of the external expansion pressure detection mechanism. According to the utility model, more average and stable horizontal extrusion force can be applied to a plurality of point positions at a plurality of positions on the inner wall of the orthopedic external fixator, so that the accuracy of a detection result is ensured when the compression resistance of the orthopedic external fixator is detected. Meanwhile, the requirements of different structural shapes of the external fixator for the orthopedics department are met, and the problems that the external fixator for the orthopedics department is damaged and the like are not easily caused in the detection process.

Description

Technical Field

[0001] The utility model relates to the technical field of fixator detection, in particular to a mechanical analysis experimental device for an orthopedic external fixator. Background Technique

[0002] An orthopedic external fixator is a medical device used for fracture reduction, deformity correction, and bone fixation, achieving mechanical stability through an external device connecting bone pins in the body. In most orthopedic external fixator usage scenarios, it is mainly used for fixing at the joints of patients, assisting in joint surgeries, and postoperative rehabilitation training.

[0003] There is a Chinese utility model patent with the authorized announcement number CN220271018U, which discloses a mechanical analysis experimental device for an orthopedic external fixator, including a base. A detection plate is fixedly connected to the upper side of the base. A top plate is provided on the upper side of the detection plate. The top plate is fixedly connected to the base through two support rods. The two support rods are arranged on the left and right sides of the detection plate. A press is provided between the top plate and the detection plate. The output end of the press is fixedly connected with a pressure rod. Cameras are fixedly connected to the sides of the two support rods close to each other. The cameras are arranged to be matched with the pressure rod. A display screen is fixedly connected to the right side of the right support rod. In the present utility model, under the action of the sliding rod and the arc-shaped groove, the adjustment operation of the overall position of the press is completed, so that the angle between the press and the external fixator meets different working requirements, making the test results diverse, and then the corresponding mechanical analysis operation can be better completed. The overall operation is simple and the practicability is strong.

[0004] Currently, the traditional external fixator force experimental device has the following problems:

[0005] When conducting experiments on traditional orthopedic external fixators to determine the safety of the external fixator during surgery, generally, the method of applying compressive forces such as extrusion forces to the external fixator is used for pressure detection. However, in actual operation of the above scheme, although the compressive capacity of the external fixator itself can be detected by extrusion, since the external fixator is installed on the patient's limb and its structure is similar to an irregular cylinder, it is difficult to reflect the compressive capacity of the external fixator by the traditional extrusion force application method. At the same time, when applying pressure to the arc surface of the external fixator, structural deformation may occur due to asymmetric loading, affecting the normal use of the external fixator. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a mechanical analysis experimental device for an orthopedic external fixator to solve the problems raised in the above background technique.

[0007] To achieve the above utility model purpose, the present utility model adopts the following technical solutions:

[0008] An orthopedic external fixator mechanical analysis experimental device provided by the utility model includes a holding handle, a cross bracket, a rubber detection head, and an outward expansion pressure detection mechanism. The top of the holding handle is provided with a cross bracket. An outward expansion pressure detection mechanism extending to the outside is arranged inside the holding handle. The outward expansion pressure detection mechanism is movably connected to the cross bracket. A rubber detection head is installed on the outside of the outward expansion pressure detection mechanism.

[0009] Among them, the outward expansion pressure detection mechanism includes:

[0010] A threaded drive assembly, the threaded drive assembly is installed inside the holding handle, the threaded drive assembly extends to the outside of the holding handle and the cross bracket, a plurality of horizontal expansion assemblies are installed on the outside of the threaded drive assembly, the horizontal expansion assemblies are slidably connected to the cross bracket, a force arm assembly is detachably installed on the side of the horizontal expansion assembly, and a rubber detection head is installed on the side of the force arm assembly.

[0011] Preferably, control buttons are installed on the side of the holding handle. There are two control buttons. The two control buttons are respectively used to start and stop the operation of the threaded drive assembly.

[0012] Among them, a display panel installed on the side of the holding handle is also arranged below the control buttons. The display panel is electrically connected to the threaded drive assembly through an internal data analysis module.

[0013] Preferably, the threaded drive assembly includes:

[0014] A linear motor, the linear motor is installed at the inner bottom of the holding handle, the output end of the linear motor is connected to a main shaft, the main shaft penetrates through the cross bracket, the main shaft is slidably connected inside a guide cylinder, and the guide cylinder is installed on the top of the cross bracket;

[0015] A threaded rod, the threaded rod is connected to the top of the main shaft, the threaded rod is located outside the guide cylinder, and a lifting sliding cylinder is threadedly connected to the outside of the threaded rod.

[0016] Among them, a limit stop block is installed at the top of the threaded rod, and a plurality of horizontal expansion assemblies are installed on the outside of the lifting sliding cylinder.

[0017] Preferably, a plurality of vertical grooves are opened on the inner wall of the lifting sliding cylinder, the vertical grooves are slidably connected to outer protrusions, and the outer protrusions are installed on the outside of the guide cylinder.

[0018] Among them, the top of the guide cylinder is connected to a support spring arranged outside the threaded rod, and the top of the support spring is connected to the inner top of the lifting sliding cylinder.

[0019] Preferably, the horizontal expansion assembly includes:

[0020] An outward convex block, which is installed on the outside of the lifting sliding cylinder. There are multiple outward convex blocks. An extrusion arm is rotatably connected to the outside of the outward convex block. The inner side of the bottom of the extrusion arm is rotatably connected to a horizontal push plate.

[0021] Wherein, the bottom of the horizontal push plate is slidably connected to the inside of a horizontal groove, and the horizontal groove is opened at an eccentric position inside the cross-shaped bracket;

[0022] A connecting protrusion, which is installed on the side of the horizontal push plate. There are multiple connecting protrusions, and a force arm assembly is installed on the side of the connecting protrusion.

[0023] Preferably, the force arm assembly includes:

[0024] A pin hole, there are multiple pin holes, and all the multiple pin holes are opened inside the connecting protrusion. An assembly body is movably connected to the outside of the connecting protrusion, and a positioning pin penetrating the pin hole is arranged inside the assembly body;

[0025] An extrusion force arm, which is installed on the side of the assembly body, and a rubber detection head is installed on the side of the extrusion force arm.

[0026] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0027] 1. When conducting experiments and tests on the orthopedic external fixator, the horizontal extrusion force can be applied to multiple points at multiple positions on the inner wall of the orthopedic external fixator in a relatively average and stable manner by horizontally moving the rubber detection heads in multiple directions, ensuring the accuracy of the test results when detecting the compressive resistance of the orthopedic external fixator. At the same time, the rubber detection head can be adjusted to meet the requirements of the structural shape of the orthopedic external fixator when applying the extrusion force for detection (for example: the muscle part has a greater inward concave arc, etc.), and it is not easy to cause damage to the orthopedic external fixator during the detection process;

[0028] 2. Due to the structural shape of the experimental device itself, it is convenient to carry the experimental device. At the same time, when detecting the orthopedic external fixator, the experimental device is flexible and has little limitation, and is suitable for different experimental and detection scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The attached drawings of the specification that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0030] In addition, the terms "installed", "set up", "provided with", "connected", "linked", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Figure 1 is a schematic structural view of the whole of the utility model;

[0032] Figure 2 is a schematic front structural view of the whole of the utility model;

[0033] Figure 3 is a schematic sectional structural view of the whole of the utility model;

[0034] Figure 4 is the utility model Figure 3 a schematic enlarged structural view of area A therein;

[0035] Figure 5 is a schematic structural view of the connection between the horizontal expansion component and the lever component of the utility model;

[0036] Figure 6 is an exploded view of the connection between the horizontal expansion component and the lever component of the utility model;

[0037] In the figure:

[0038] 10. Holding handle; 101. Control button; 102. Display panel;

[0039] 20. Cross bracket; 30. Rubber detection head; 40. External expansion pressure detection mechanism;

[0040] 50. Thread driving component; 501. Linear motor; 502. Main shaft; 503. Guide cylinder; 5031. Support spring; 504. Threaded rod; 505. Lifting sliding cylinder; 5051. Vertical groove; 5052. External protrusion; 506. Limit stop block;

[0041] 60. Horizontal expansion component; 601. External convex block; 602. Extrusion arm; 603. Horizontal push plate; 6031. Horizontal groove; 604. Connection protrusion;

[0042] 70. Lever component; 701. Pin hole; 702. Assembly; 703. Positioning pin; 704. Extrusion lever arm. Detailed implementation manners

[0043] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0044] Please refer to Figures 1 - 6 , an orthopedic external fixator mechanical analysis experimental device includes a holding handle 10, a cross bracket 20, a rubber detection head 30, and an outward expansion pressure detection mechanism 40. A cross bracket 20 is installed at the top of the holding handle 10. An outward expansion pressure detection mechanism 40 extending to the outside is arranged inside the holding handle 10. The outward expansion pressure detection mechanism 40 is movably connected to the cross bracket 20. A rubber detection head 30 is installed on the outside of the outward expansion pressure detection mechanism 40. Among them, the outward expansion pressure detection mechanism 40 includes a threaded drive assembly 50 installed inside the holding handle 10. The threaded drive assembly 50 extends to the outside of the holding handle 10 and the cross bracket 20. A plurality of horizontal expansion assemblies 60 are installed on the outside of the threaded drive assembly 50. The horizontal expansion assemblies 60 are slidably connected to the cross bracket 20. An arm assembly 70 is detachably installed on the side of the horizontal expansion assembly 60. A rubber detection head 30 is installed on the side of the arm assembly 70.

[0045] In the present utility model, control buttons 101 are installed on the side of the holding handle 10. There are two control buttons 101, and the two control buttons 101 are respectively used to start and stop the operation of the threaded drive assembly 50. Among them, a display panel 102 installed on the side of the holding handle 10 is also arranged below the control buttons 101. The display panel 102 is electrically connected to the threaded drive assembly 50 through an internal data analysis module.

[0046] During actual use of the above solution, the staff holds the holding handle 10, extends the experimental device into the orthopedic external fixator to be detected, and at the same time adjusts the position of the rubber detection head 30 in the horizontal plane through the arm assembly 70 according to the positions of each surface of the orthopedic external fixator, ensuring that multiple rubber detection heads 30 are more evenly in contact with the inner wall of the orthopedic external fixator simultaneously. Then, during the experimental detection, press the control button 101 to start the operation of the threaded drive assembly 50, drive the horizontal expansion assemblies 60 to operate, so that the rubber detection heads 30 at multiple positions expand outward synchronously and are in contact with the inner wall of the orthopedic external fixator simultaneously. At this time, the data of the threaded drive assembly 50 and the rubber detection head 30 can be displayed on the display panel 102, and the pressure detection operation of the orthopedic external fixator is realized through the pressure data fed back by the rubber detection head 30.

[0047] In this solution, when performing mechanical experiment detection on the orthopedic external fixator, multiple points on the inner wall of the orthopedic external fixator are synchronously detected, and the applied force is a relatively uniform and balanced horizontal extrusion force, which can reduce the damage degree to the orthopedic external fixator during the detection process while ensuring the detection effect, and it is not easy to cause damage to the orthopedic external fixator during the experimental detection.

[0048] Specific reference Figure 2 、 Figure 3 and Figure 4 As shown in FIGS. 5-7, the screw drive assembly 50 includes a linear motor 501. The linear motor 501 is installed at the inner bottom of the holding handle 10. The output end of the linear motor 501 is connected to a main shaft 502. The main shaft 502 passes through the cross bracket 20. The main shaft 502 is slidably connected inside a guide cylinder 503. The guide cylinder 503 is installed at the top of the cross bracket 20; a threaded rod 504, the threaded rod 504 is connected to the top of the main shaft 502. The threaded rod 504 is located outside the guide cylinder 503. A lifting sliding cylinder 505 is threadedly connected to the outside of the threaded rod 504. Among them, a limit stop block 506 is installed at the top of the threaded rod 504, and a plurality of horizontal expansion assemblies 60 are installed on the outside of the lifting sliding cylinder 505.

[0049] In this embodiment, a plurality of vertical grooves 5051 are formed in the inner wall of the lifting sliding cylinder 505. The vertical grooves 5051 are slidably connected to the outer protrusions 5052. The outer protrusions 5052 are installed on the outside of the guide cylinder 503. Among them, a support spring 5031 arranged outside the threaded rod 504 is connected to the top of the guide cylinder 503, and the top of the support spring 5031 is connected to the inner top of the lifting sliding cylinder 505.

[0050] In the above embodiment, when the lifting sliding cylinder 505 operates, under the action of the slidably connected vertical grooves 5051 and outer protrusions 5052, the moving direction of the lifting sliding cylinder 505 can be guided to ensure that the lifting sliding cylinder 505 only moves up and down in the vertical direction.

[0051] For the orthopedic external fixator mechanical analysis experimental device of the present utility model, when performing experiments and detections on the orthopedic external fixator, start the linear motor 501 to operate, driving the main shaft 502 connected to the output end of the linear motor 501 to rotate. When the main shaft 502 rotates, the threaded rod 504 connected to its top will rotate synchronously, and drive the lifting sliding cylinder 505 threadedly connected to the outside of the threaded rod 504 to operate.

[0052] Specific reference Figure 5 and Figure 6, the horizontal expansion assembly 60 includes an outward convex block 601. The outward convex block 601 is installed on the outer side of the lifting sliding cylinder 505. There are multiple outward convex blocks 601. The outer side of the outward convex block 601 is rotatably connected to a pressing arm 602. The inner side of the bottom of the pressing arm 602 is rotatably connected to a horizontal push plate 603. Among them, the bottom of the horizontal push plate 603 is slidably connected inside a horizontal groove 6031, and the horizontal groove 6031 is opened at an eccentric position inside the cross bracket 20; a connecting protrusion 604, the connecting protrusion 604 is installed on the side of the horizontal push plate 603. There are multiple connecting protrusions 604, and a force arm assembly 70 is installed on the side of the connecting protrusion 604.

[0053] For the orthopedic external fixator mechanical analysis experimental device of the present utility model, when the lifting sliding cylinder 505 operates, the outward convex block 601 installed on its outer side will move up and down synchronously, and cause the pressing arm 602 rotatably connected to the outer side of the outward convex block 601 to operate. At this time, when the pressing arm 602 operates, it can drive the horizontal push plate 603 rotatably connected to its side to slide inside the horizontal groove 6031, and drive the connecting protrusion 604 installed on the side of the horizontal push plate 603 to perform an outward-expanded horizontal movement, so that the rubber detection head 30 can contact the inner wall of the orthopedic external fixator and detect it.

[0054] Specifically refer to Figure 5 and Figure 6 , the force arm assembly 70 includes a pin hole 701. There are multiple pin holes 701. All the multiple pin holes 701 are opened inside the connecting protrusion 604. The outer side of the connecting protrusion 604 is movably connected to an assembly body 702. A positioning pin 703 passing through the pin hole 701 is arranged inside the assembly body 702; a pressing force arm 704, the pressing force arm 704 is installed on the side of the assembly body 702, and a rubber detection head 30 is installed on the side of the pressing force arm 704.

[0055] For the orthopedic external fixator mechanical analysis experimental device of the present utility model, when conducting experiments and detections on the orthopedic external fixator, due to reasons such as muscles in the leg and arm parts, the curvature of the orthopedic external fixator in the muscle part will be greater than that of the ordinary part. At this time, according to the actual shape of the orthopedic external fixator, by the one-to-one correspondence of the pin hole 701 and the positioning pin 703, the horizontal distance of each rubber detection head 30 can be adjusted to ensure that when applying a pressing force for detection, each rubber detection head 30 will contact the inner wall of the orthopedic external fixator relatively evenly.

[0056] It should be noted that in this solution, the operating principles, operating circuits, systems, etc. of the control button 101, the display panel 102, the linear motor 501, and the rubber detection head 30 are all existing technologies.

[0057] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An experimental device for mechanical analysis of an orthopedic external fixator, comprising a holding handle (10), a cross bracket (20), a rubber detection head (30) and an outward expansion pressure detection mechanism (40), characterized in that: A cross bracket (20) is installed at the top of the holding handle (10). An outward expansion pressure detection mechanism (40) extending to the outside is arranged inside the holding handle (10). The outward expansion pressure detection mechanism (40) is movably connected to the cross bracket (20). A rubber detection head (30) is installed on the outside of the outward expansion pressure detection mechanism (40). Among them, the outward expansion pressure detection mechanism (40) includes: A threaded drive assembly (50). The threaded drive assembly (50) is installed inside the holding handle (10). The threaded drive assembly (50) extends to the outside of the holding handle (10) and the cross bracket (20). A plurality of horizontal expansion assemblies (60) are installed on the outside of the threaded drive assembly (50). The horizontal expansion assemblies (60) are slidably connected to the cross bracket (20). An arm assembly (70) is detachably installed on the side of the horizontal expansion assembly (60). A rubber detection head (30) is installed on the side of the arm assembly (70).

2. The mechanical analysis experimental device for an orthopedic external fixator according to claim 1, wherein: Control buttons (101) are installed on the side of the holding handle (10). There are two control buttons (101). The two control buttons (101) are respectively used to start and stop the threaded drive assembly (50) from operating. Among them, a display panel (102) installed on the side of the holding handle (10) is further arranged below the control button (101). The display panel (102) is electrically connected to the threaded drive assembly (50) through an internal data analysis module.

3. The mechanical analysis experimental device of an orthopedic external fixator according to claim 1, characterized in that: The threaded drive assembly (50) includes: A linear motor (501). The linear motor (501) is installed at the inner bottom of the holding handle (10). The output end of the linear motor (501) is connected to a main shaft (502). The main shaft (502) penetrates through the cross bracket (20). The main shaft (502) is slidably connected inside a guide cylinder (503). The guide cylinder (503) is installed at the top of the cross bracket (20). A threaded rod (504). The threaded rod (504) is connected to the top of the main shaft (502). The threaded rod (504) is located outside the guide cylinder (503). A lifting sliding cylinder (505) is threadedly connected to the outside of the threaded rod (504). Among them, a limit stop block (506) is installed at the top of the threaded rod (504). A plurality of horizontal expansion assemblies (60) are installed on the outside of the lifting sliding cylinder (505).

4. An orthopedic external fixator mechanical analysis experimental device according to claim 3, characterized in that: A plurality of vertical grooves (5051) are formed in the inner wall of the lifting sliding cylinder (505). The vertical grooves (5051) are slidably connected to outward protrusions (5052). The outward protrusions (5052) are installed on the outside of the guide cylinder (503). Among them, the top of the guide cylinder (503) is connected to a support spring (5031) arranged on the outside of the threaded rod (504). The top of the support spring (5031) is connected to the inner top of the lifting sliding cylinder (505).

5. The mechanical analysis experimental device of an orthopedic external fixator according to claim 3, characterized in that: The horizontal expansion assembly (60) includes: An outward convex block (601), the outward convex block (601) is installed on the outer side of the lifting sliding cylinder (505), a plurality of the outward convex blocks (601) are provided, and an extrusion arm (602) is rotatably connected to the outer side of the outward convex block (601), and a horizontal push plate (603) is rotatably connected to the inner side of the bottom of the extrusion arm (602). Wherein, the bottom of the horizontal push plate (603) is slidably connected inside a horizontal groove (6031), and the horizontal groove (6031) is opened at an eccentric position inside the cross bracket (20). A connecting protrusion (604), the connecting protrusion (604) is installed on the side surface of the horizontal push plate (603), a plurality of the connecting protrusions (604) are provided, and a force arm assembly (70) is installed on the side surface of the connecting protrusion (604).

6. The mechanical analysis experimental device for an orthopedic external fixator according to claim 5, wherein: The force arm assembly (70) includes: A pin hole (701), a plurality of the pin holes (701) are provided, and all the pin holes (701) are opened inside the connecting protrusion (604), an assembly body (702) is movably connected to the outer side of the connecting protrusion (604), and a positioning pin (703) penetrating through the pin hole (701) is arranged inside the assembly body (702). An extrusion force arm (704), the extrusion force arm (704) is installed on the side surface of the assembly body (702), and a rubber detection head (30) is installed on the side surface of the extrusion force arm (704).

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