Adjustable femur model bone micromotion experiment device

Abstract

The invention relates to an adjustable femur model bone micro-motion experiment device, and belongs to the technical field of femur model bone micro-motion experiments, the adjustable femur model bone micro-motion experiment device comprises an experiment machine, and a supporting column used for supporting is fixedly installed on the top surface of the experiment machine and located below the output end; fastening groove blocks used for fastening are fixedly installed on the top face of the supporting column and the output end of the experiment machine correspondingly, conveying ring cavities used for conveying are formed in the inner walls of the two fastening groove blocks, and two L-shaped air leakage openings used for air leakage are formed in the two opposite sides of the inner walls of the two conveying ring cavities correspondingly. The inner walls of the multiple L-shaped air leakage openings are provided with adjusting assemblies used for adjusting air leakage, and the peripheral sides of the inner walls of the two conveying ring cavities are provided with a plurality of extrusion assemblies used for extrusion and fastening. The problem of experimental errors caused by infirm fixation or excessive fastening of the thighbone model is avoided, and the experimental accuracy of the whole device is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of femoral model bone micro-motion experiment, in particular to an adjustable femoral model bone micro-motion experiment device. BACKGROUND

[0002] The femoral model bone micro-motion experiment is an experimental process of applying a load simulating physiological activity to a femoral model usually combined with implants such as artificial joints, bone screws, etc., inducing the model to produce a small relative displacement, and then detecting the micro-motion amplitude, distribution and related mechanical response to evaluate the implant stability, bone healing risk, etc. The device for ensuring the femoral model bone micro-motion experiment is called a femoral model bone micro-motion experiment device.

[0003] In use, the traditional femoral model bone micro-motion experiment device needs to fasten the femoral model, and then apply a load simulating physiological activity to it by using a load output device, so as to ensure the smooth progress of the overall experiment. The fixing effect of the femoral model directly affects the accuracy of the overall experiment. When the femoral model is not fixed firmly, the overall sliding occurs. When the femoral model is fixed too firmly, additional stress is introduced, which affects the accuracy of the experiment. In addition, the femoral model will be affected by the material to produce different stress ranges.

[0004] In order to solve the above problems, an adjustable femoral model bone micro-motion experiment device is proposed. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an adjustable femoral model bone micro-motion experiment device, which solves the problem that the traditional device cannot adjust the fixed femoral model for micro-motion experiment, and improves the applicability of the device.

[0006] To achieve the above purpose, the present application provides the following technical scheme: an adjustable femoral model bone micro-motion experiment device, comprising an experiment machine, a support column is fixedly installed on the top surface of the experiment machine below the output end for supporting, a fastening groove block for fastening is fixedly installed on the top surface of the support column and the output end of the experiment machine, two inner walls of the fastening groove block are provided with a conveying ring cavity for conveying, and two opposite sides of the inner walls of the two conveying ring cavities are provided with two L-shaped air release ports for air release, the inner walls of the L-shaped air release ports are provided with an adjusting assembly for adjusting air release, the circumferential sides of the inner walls of the two conveying ring cavities are provided with a plurality of extrusion assemblies for extruding and fastening, and a plurality of corresponding extrusion assemblies are equidistantly arranged on the inner wall of the fastening groove block. The top surface of the experiment machine is fixedly installed with a support groove block for supporting on both sides of the support column, and the inner walls of the two support groove blocks are threadedly connected with adjusting lead screws for lifting, the top surfaces of the two adjusting lead screws are rotatably installed with laser displacement sensors for detecting displacement, and the front side of the inside of the fastening groove block is provided with a gas feeding assembly for feeding gas.

[0007] Furthermore, the adjustment assembly includes a fixing ring fixedly installed on the upper side of the inner wall of the L-shaped vent, and a blocking block for sealing is engaged with the inner wall of the fixing ring. A limiting rod for limiting is fixedly installed on the side of the blocking block away from the fixing ring. A vent plate for squeezing and venting is movably installed on the side of the limiting rod away from the fixing ring. An adjustment spring is sleeved between the blocking block and the vent plate on the side of the limiting rod. The vent plate is fixedly installed with first extrusion blocks for extrusion on the side away from the fixed ring and on both sides of the limiting rod. The two first extrusion blocks are slidably installed with second extrusion blocks for extrusion on the side away from the fixed ring. The top surfaces of the two second extrusion blocks are fixedly installed with a combination plate for assembly. The top surface of the combination plate is provided with a rotating component for rotation output.

[0008] Furthermore, the rotating assembly includes a rotating screw rotatably mounted on the top surface of the composite plate, and a threaded sleeve is threadedly connected to the upper part of the rotating screw wall. A fixing frame for fixing is rotatably mounted on the side of the threaded sleeve away from the composite plate, and a pointing ring is fixedly mounted on the side of the rotating screw wall located on the side of the threaded sleeve. Several scale strips are fixedly mounted on one side of the fixing frame surface located on the side of the pointing ring.

[0009] Furthermore, the extrusion assembly includes a piston cylinder fixedly installed on the inner wall of the conveying ring cavity, and a piston block for pushing is movably installed on the inner wall of the piston cylinder. An extrusion rod for extrusion is fixedly installed on the side of the piston block away from the conveying ring cavity, and a reset spring for resetting is sleeved between the piston block and the conveying ring cavity on the rod wall of the extrusion rod.

[0010] Furthermore, the air supply assembly includes a conveying cavity formed inside the front side of the fastening slot block, and two pushing blocks for pushing are movably installed on the inner wall of the conveying cavity. A pushing rod for squeezing is fixedly installed on the surface of the two pushing blocks. Air venting vertical pipes for ventilation are fixedly installed on the left and right sides of the upper and lower sides of the inner wall of the conveying cavity, and check valves are fixedly installed on the inner walls of the air venting vertical pipes. The upper and lower check valves are arranged in opposite directions. An air venting valve body for venting is fixedly installed on one side of the top surface of the fastening slot block.

[0011] Furthermore, the surfaces of several of the venting discs are tightly fitted to the inner walls of the corresponding L-shaped vents, and the several first extrusion blocks and several second extrusion blocks are all four-sided pyramid structures with right-angled triangles in their vertical cross-section.

[0012] Furthermore, the upper ends of several of the rotating lead screws respectively penetrate one side of the inner wall of the L-shaped vent and the surface of the corresponding fixing frame, extending into the interior of the fixing frame.

[0013] Further, the experimental machine is a universal material testing machine, and the two support groove blocks are oppositely arranged with the axis of the support column as the symmetry axis.

[0014] Further, the ends of the plurality of extrusion rods away from the conveying ring cavity extend through one side of the inner wall of the conveying ring cavity to the inside of the fastening groove block, and the ends of the extrusion rods away from the conveying ring cavity are arranged in an arc shape.

[0015] Further, the two conveying circular cavities are arranged on the front side of the adjusting assembly, the surfaces of the two corresponding pushing circular blocks are tightly combined with the inner walls of the corresponding conveying circular cavities, the two pushing circular blocks are arranged at the inner center of the conveying circular cavities, one end of the pushing rod extends through one side of the inner wall of the conveying circular cavity to the surface of the fastening groove block, and the end of the pushing rod away from the fastening groove block is fixedly installed with a rotating block for rotation, and the two corresponding air permeation vertical pipes are arranged at the end of the conveying circular cavity.

[0016] Compared with the prior art, the present application provides an adjustable femoral model bone micro-motion experimental device, which has the following advantages: 1. The device can adjust the fastening degree of the clamping to meet the fastening needs of femoral models of different materials, avoid experimental errors caused by loose or overly fastened femoral models, and ensure the experimental accuracy of the overall device.

[0017] 2. The device uses the special quadrangular pyramid structure of the extrusion inclined block structure to ensure that the two quadrangular pyramid bodies are staggered and combined with the straight sides at a right angle, forming a bidirectional pushing and sliding effect, thereby ensuring the convenient mobility of the extrusion inclined block during the pressing process of the combination plate.

[0018] 3. The device uses the through arrangement of the rotating lead screw to ensure that the rotating lead screw is subjected to the threaded extrusion force of the threaded sleeve and is smoothly transmitted downward, thereby ensuring the movement power supply of the combination plate and avoiding affecting the normal use function of the structure in the device.

[0019] 4. The device uses the arc-shaped end of the extrusion rod to avoid the problem of damage to the femoral model bone caused by the sharp structure of the structure in the device, ensures that the surface of the femoral model bone is not damaged during the experimental process, and increases the applicability of the device.

[0020] 5. The device uses the rotating block to reduce the difficulty of operating the pushing rod, thereby increasing the conveying comfort of the structure in the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a perspective view of the whole device of the present application; Figure 2 It is a perspective view of the fastening groove block of the present application; Figure 3 It is a vertical sectional perspective view of the fastening groove block of the present application; Figure 4 As Figure 3 Enlarged structural diagram of A part in the middle Figure 5 Combined perspective view of the rotating assembly and the adjusting assembly of the present application Figure 6 Longitudinal sectional perspective view of the fastening groove block of the present application Figure 7 As Figure 6 Enlarged structural diagram of B part in the middle Figure 8 Transverse sectional perspective view of the present application Figure 9 Perspective view of the push rod of the present application Figure 10 Perspective view of the piston cylinder of the present application Figure 11 Vertical sectional perspective view of the air-permeable vertical pipe of the present application

[0022] In the figure: 1, experimental machine; 2, support column; 3, fastening groove block; 4, conveying ring cavity; 5, L-shaped air release port; 6, adjusting assembly; 601, fixed ring; 602, plugging block; 603, limiting rod; 604, air-permeable hole disc; 605, adjusting spring; 606, first extrusion inclined block; 607, second extrusion inclined block; 608, combined plate; 7, extrusion assembly; 701, piston cylinder; 702, piston block; 703, extrusion rod; 704, return spring; 8, support groove block; 9, adjusting screw rod; 10, laser displacement sensor; 11, rotating assembly; 1101, rotating screw rod; 1102, threaded sleeve; 1103, fixed frame; 1104, pointing ring; 1105, scale bar; 12, air feeding assembly; 1201, conveying circular cavity; 1202, pushing circular block; 1203, push rod; 1204, air-permeable vertical pipe; 1205, check valve; 1206, air release valve body; 13, rotating block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0024] Please refer to Figures 1 to 11This embodiment of an adjustable femoral model bone micromotion experimental device includes an experimental machine 1, which is a universal material testing machine. A support column 2 for support is fixedly installed on the top surface of the experimental machine 1 below the output end. Fastening groove blocks 3 for fastening are fixedly installed on the top surface of the support column 2 and the output end of the experimental machine 1. The inner walls of the two fastening groove blocks 3 are provided with conveying ring cavities 4 for conveying. Two L-shaped vent ports 5 for venting are opened on opposite sides of the inner walls of the two conveying ring cavities 4. The inner walls of the L-shaped vent ports 5 are provided with adjusting components 6 for adjusting venting. The periphery of the inner walls of the two conveying ring cavities 4 is provided with several extrusion components 7 for extrusion fastening. Several corresponding extrusion components 7 are equidistantly arranged on the inner walls of the fastening groove blocks 3. The top surface of the experimental machine 1 is fixedly installed with support slots 8 on both sides of the support column 2. The two support slots 8 are arranged opposite each other with the axis of the support column 2 as the axis of symmetry. The diagonal arrangement of the two support slots 8 can ensure that the laser displacement sensor 10 can detect relative to each other and avoid the problem of dead angle detection. The inner walls of the two support slots 8 are threaded with adjusting screws 9 for lifting. The top surfaces of the two adjusting screws 9 are rotatably installed with laser displacement sensors 10 for detecting displacement. The front side of the fastening slot 3 is provided with a gas delivery assembly 12 for conveying gas.

[0025] The adjusting component 6 includes a fixing ring 601 fixedly installed on the upper side of the inner wall of the L-shaped vent 5, and a blocking block 602 for sealing is engaged with the inner wall of the fixing ring 601. A limiting rod 603 for limiting is fixedly installed on the side of the blocking block 602 away from the fixing ring 601. A venting plate 604 for squeezing and venting is movably installed on the side of the limiting rod 603 away from the fixing ring 601. The surfaces of several venting plates 604 are respectively tightly fitted to the inner wall of the corresponding L-shaped vent 5. An adjusting spring 605 is sleeved between the blocking block 602 and the venting plate 604 on the rod wall of the limiting rod 603. On the side of the vent plate 604 away from the fixed ring 601 and on both sides of the limiting rod 603, there are fixed installations of first extrusion inclined blocks 606 for extrusion. Several first extrusion inclined blocks 606 and several second extrusion inclined blocks 607 are all four-sided pyramid structures with right-angled triangles in the vertical cross section. On the side of the two first extrusion inclined blocks 606 away from the fixed ring 601, there are slidably installed second extrusion inclined blocks 607 for extrusion. The top surfaces of the two second extrusion inclined blocks 607 are fixedly installed with a combination plate 608 for assembly. The top surface of the combination plate 608 is provided with a rotating component 11 for rotation output. The force applied to the load by several adjusting springs 605 is 80%-90% higher than that of the return spring 704. Because the elasticity of the adjusting spring 605 is greater than that of the return spring 704, the adjusting spring 605 can ensure the normal sealing effect of the sealing block 602 under the elastic thrust. When there is no air pressure in the conveying ring cavity 4, the extrusion rod 703 will retract into the conveying ring cavity 4. This application, through the design of the adjustment component 6, can precisely control the venting of the L-shaped vent 5. The elasticity of the adjustment spring 605 is greater than that of the return spring 704, and the force applied to the load is 80%-90% higher than that of the return spring 704. This allows the sealing block 602 to achieve a good sealing effect under the elastic thrust of the adjustment spring 605. When it is necessary to adjust the air pressure in the conveying ring cavity 4, the rotating component 11 can play a role. By rotating the rotating screw 1101, the threaded sleeve 1102 will drive the fixed frame 1103 to move, which in turn pushes the vent plate 604 through the first extrusion inclined block 606 and the second extrusion inclined block 607, changing its degree of contact with the inner wall of the L-shaped vent 5, thereby achieving precise adjustment of the venting speed and flow rate.

[0026] The rotating assembly 11 includes a rotating screw 1101 rotatably mounted on the top surface of the combined plate 608. A threaded sleeve 1102 is threadedly connected to the upper part of the wall of the rotating screw 1101. A fixing frame 1103 for fixing is rotatably mounted on the side of the threaded sleeve 1102 away from the combined plate 608. The upper ends of several rotating screws 1101 respectively penetrate one side of the inner wall of the L-shaped vent 5 and the surface of the corresponding fixing frame 1103, extending into the interior of the fixing frame 1103. A guide ring 1104 is fixedly mounted on the wall of the rotating screw 1101 on one side of the threaded sleeve 1102. Several scale bars 1105 are fixedly mounted on one side of the surface of the fixing frame 1103 on one side of the guide ring 1104.

[0027] The extrusion assembly 7 includes a piston cylinder 701 fixedly installed on the inner wall of the conveying ring cavity 4, and a piston block 702 for pushing is movably installed on the inner wall of the piston cylinder 701. An extrusion rod 703 for extrusion is fixedly installed on the side of the piston block 702 away from the conveying ring cavity 4. A reset spring 704 for resetting is sleeved between the piston block 702 and the conveying ring cavity 4 on the rod wall of the extrusion rod 703. The ends of several extrusion rods 703 away from the conveying ring cavity 4 extend through one side of the inner wall of the conveying ring cavity 4 into the interior of the fastening groove block 3. The ends of the extrusion rods 703 away from the conveying ring cavity 4 are rounded. The piston cylinder 701, piston block 702, extrusion rod 703, and return spring 704 in the extrusion assembly 7 work together to provide a reliable fastening effect for the femoral model. When gas is filled into the delivery ring cavity 4, the air pressure pushes the piston block 702, causing the extrusion rod 703 to extend and press against the femoral model. The end of the extrusion rod 703 away from the delivery ring cavity 4 is rounded, which can effectively avoid damage to the femoral model. The return spring 704 can retract the extrusion rod 703 into the delivery ring cavity 4 when there is no air pressure in the delivery ring cavity 4, making it convenient to replace the femoral model.

[0028] The air supply assembly 12 includes a conveying cavity 1201 located inside the front side of the fastening slot block 3. Two pushing blocks 1202 are movably installed on the inner wall of the conveying cavity 1201. A pushing rod 1203 for pressing is fixedly installed on the surface of both pushing blocks 1202. Air venting vertical pipes 1204 are fixedly installed on the left and right sides of the upper and lower sides of the inner wall of the conveying cavity 1201. Check valves 1205 are fixedly installed on the inner wall of each air venting vertical pipe 1204, with the upper and lower check valves 1205 having opposite check directions. A... The vent valve body 1206 for venting has two conveying cavities 1201 located in front of the adjusting assembly 6. The surfaces of the two corresponding pushing blocks 1202 are in close contact with the inner walls of the corresponding conveying cavities 1201. The two pushing blocks 1202 are located at the center inside the conveying cavities 1201. One end of the push rod 1203 extends through one side of the inner wall of the conveying cavity 1201 to the surface of the fastening groove block 3. A rotating block 13 for rotation is fixedly installed at the end of the push rod 1203 away from the fastening groove block 3. Two corresponding venting vertical pipes 1204 are located at the ends of the conveying cavities 1201. The device utilizes the design of the gas delivery assembly 12 to achieve convenient gas delivery and circulation through the cooperation of components such as the pushing block 1202, the push rod 1203, the venting vertical pipe 1204, and the check valve 1205. Pushing the rotating block 13 moves the push rod 1203, which in turn moves the block 1202 within the delivery cavity 1201. When the block 1202 moves to one side, the check valve 1205 in the venting vertical pipe 1204 on that side opens, and gas is forced into the delivery ring cavity 4. When the block 1202 moves in the opposite direction, the check valve 1205 in the venting vertical pipe 1204 on the other side opens, and gas flows back from the delivery ring cavity 4 to the delivery cavity 1201, thus achieving gas recycling. The vent valve body 1206 can promptly discharge excess gas when necessary, ensuring the safe operation of the device.

[0029] The working principle of the above embodiments is as follows: When the device is in use, the experimental machine 1 can apply loads that simulate physiological activities, ensuring the power output effect of the femoral model bone micro-motion experiment. In addition, the laser displacement sensor 10 records the displacement of the experimental position, thereby ensuring the overall experimental effect of the femoral model bone. The functions of the experimental machine 1 and the laser displacement sensor 10 in this device are all existing mature technologies. This device highlights the innovative structure and will not elaborate on the existing mature technologies. To ensure the accuracy of experimental data from the femoral model bone, it is necessary to tighten the femoral model bone and avoid problems such as loosening or over-tightening during the tightening process. This application can fix the femoral model bone by wrapping the surface of the femoral model bone with the extrusion component 7 and by adjusting the tightening force, which facilitates the subsequent experiments on the femoral model bone. Before fastening the femoral model bone, the position of the fixing frame 1103 and the pointing ring 1104 needs to be adjusted according to the material of the femoral model bone. The pointing ring 1104 points to different scale bars 1105, reflecting the fixing force of the compression assembly 7. The rotation of the threaded sleeve 1102 drives the rotating screw 1101 to move up and down. This, in turn, ensures the amount of contact between the first compression wedge 606 and the second compression wedge 607 during the movement of the combined plate 608. This ensures that the vent plate 604 compresses the adjusting spring 605. If the second compression wedge 607 moves downwards a relatively short distance... The pressure is high, so the first compression inclined block 606 compresses the adjusting spring 605 more forcefully. This requires a high air pressure in the conveying ring cavity 4 to ensure that the sealing block 602 is pushed open. When there is a large air pressure in the conveying ring cavity 4, the piston block 702 in the piston cylinder 701 will be displaced. In turn, the piston block 702 will drive the compression rod 703 to move into the fastening groove 3, thereby wrapping, compressing and limiting the femoral model bone in the fastening groove 3 to ensure the overall fixation stability. When the air pressure in the conveying ring cavity 4 reaches the force that can push the sealing block 602 to move, the air will be released, thus ending the fixation effect on the femoral model bone. The operator needs to introduce gas into the conveying ring cavity 4 through the air supply component 12 to ensure the operation of the extrusion component 7 within the conveying ring cavity 4. As the operator pulls the push rod 1203, the push block 1202 moves. When the push block 1202 moves to the left, it approaches the conveying ring cavity 1201, thus extruding gas into the space on the left. This allows gas in the left space to be introduced into the conveying ring cavity 4 through the lower venting vertical pipe 1204. Meanwhile, the right space experiences negative pressure as the push block 1202 moves away, allowing gas to be released into the right space through the upper venting vertical pipe 1204. When gas is drawn in, the push rod 1203 rotates in the reverse direction, squeezing the space on the right side and thus delivering the gas in the right space to the delivery ring cavity 4. The space on the left side is then refilled with gas, and this back-and-forth motion ensures the quality of the gas filling of the delivery ring cavity 4. When the gas in the delivery ring cavity 4 reaches a point where it pushes the sealing block 602 to move and release the gas, the fixation of the femoral model bone is completed. After the experiment, the operator opens the vent valve 1206 to completely release the gas from the delivery ring cavity 4. Then, under the elasticity of the return spring 704, the squeeze rod 703 will retract back into the delivery ring cavity 4, thus ending the experimental process on the femoral model bone.

[0030] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

Claims

1. An adjustable femoral model bone micromotion experimental device, comprising an experimental machine (1), characterized in that: The top surface of the experimental machine (1) is fixedly installed with a support column (2) below the output end. The top surface of the support column (2) and the output end of the experimental machine (1) are both fixedly installed with fastening slot blocks (3). The inner walls of the two fastening slot blocks (3) are provided with conveying ring cavities (4) for conveying. On opposite sides of the inner walls of the two conveying ring cavities (4), there are two L-shaped vent ports (5) for venting. The inner walls of the L-shaped vent ports (5) are provided with adjusting components (6) for adjusting venting. The periphery of the inner walls of the two conveying ring cavities (4) is provided with several extrusion components (7) for extrusion fastening. Several corresponding extrusion components (7) are equidistantly arranged on the inner walls of the fastening slot blocks (3). The experimental machine (1) has support slots (8) fixedly installed on both sides of the support column (2) on the top surface. The inner walls of the two support slots (8) are threaded with adjusting screws (9) for lifting. The top surfaces of the two adjusting screws (9) are rotatably installed with laser displacement sensors (10) for detecting displacement. The front side of the fastening slot (3) is provided with a gas delivery assembly (12) for delivering gas.

2. The adjustable femoral model bone micromotion experimental device according to claim 1, characterized in that: The adjusting assembly (6) includes a fixing ring (601) fixedly installed on the upper side of the inner wall of the L-shaped vent (5), and a blocking block (602) for sealing is snapped into the inner wall of the fixing ring (601). A limiting rod (603) for limiting is fixedly installed on the side of the blocking block (602) away from the fixing ring (601). A venting plate (604) for squeezing and venting is movably installed on the side of the limiting rod (603) away from the fixing ring (601). An adjusting spring (605) is sleeved between the blocking block (602) and the venting plate (604) on the side of the limiting rod (603). The vent plate (604) is fixedly installed with first extrusion blocks (606) for extrusion on the side away from the fixed ring (601) and on both sides of the limiting rod (603). The two first extrusion blocks (606) are slidably installed with second extrusion blocks (607) for extrusion on the side away from the fixed ring (601). The top surfaces of the two second extrusion blocks (607) are fixedly installed with a combination plate (608) for assembly. The top surface of the combination plate (608) is provided with a rotating component (11) for rotation output.

3. The adjustable femoral model bone micromotion experimental device according to claim 2, characterized in that: The rotating assembly (11) includes a rotating screw (1101) rotatably mounted on the top surface of the combination plate (608), and a threaded sleeve (1102) is threadedly connected to the upper part of the wall of the rotating screw (1101). A fixing frame (1103) for fixing is rotatably mounted on the side of the threaded sleeve (1102) away from the combination plate (608). A guide ring (1104) is fixedly mounted on the side of the rotating screw (1101) located on the threaded sleeve (1102), and several scale bars (1105) are fixedly mounted on one side of the surface of the fixing frame (1103) located on the side of the guide ring (1104).

4. The adjustable femoral model bone micromotion experimental device according to claim 1, characterized in that: The extrusion assembly (7) includes a piston cylinder (701) fixedly installed on the inner wall of the conveying ring cavity (4), and a piston block (702) for pushing is movably installed on the inner wall of the piston cylinder (701). An extrusion rod (703) for extrusion is fixedly installed on the side of the piston block (702) away from the conveying ring cavity (4), and a reset spring (704) for resetting is sleeved between the piston block (702) and the conveying ring cavity (4) on the rod wall of the extrusion rod (703).

5. The adjustable femoral model bone micromotion experimental device according to claim 1, characterized in that: The air supply assembly (12) includes a conveying cavity (1201) opened inside the front side of the fastening slot (3), and two pushing blocks (1202) for pushing are movably installed on the inner wall of the conveying cavity (1201). The surfaces of the two pushing blocks (1202) are fixedly installed with a push rod (1203) for squeezing. The upper and lower sides of the inner wall of the conveying cavity (1201) are fixedly installed with ventilation vertical pipes (1204) for ventilation. The inner walls of the ventilation vertical pipes (1204) are fixedly installed with check valves (1205). The upper and lower check valves (1205) are set in opposite directions. A venting valve body (1206) for venting is fixedly installed on one side of the top surface of the fastening slot (3).

6. The adjustable femoral model bone micromotion experimental device according to claim 2, characterized in that: The surfaces of several of the venting discs (604) are tightly fitted to the inner walls of the corresponding L-shaped vents (5). Several of the first extrusion blocks (606) and several of the second extrusion blocks (607) are all four-sided pyramid structures and the vertical cross-section of the four-sided pyramid is a right triangle.

7. The adjustable femoral model bone micromotion experimental device according to claim 3, characterized in that: The upper ends of several of the aforementioned rotating lead screws (1101) penetrate one side of the inner wall of the L-shaped vent (5) and the surface of the corresponding fixing frame (1103), extending into the interior of the fixing frame (1103).

8. The adjustable femoral model bone micromotion experimental device according to claim 6, characterized in that: The experimental machine (1) is a universal material testing machine, and the two support slots (8) are arranged relative to each other with the axis of the support column (2) as the axis of symmetry.

9. The adjustable femoral model bone micromotion experimental device according to claim 4, characterized in that: The ends of several of the extrusion rods (703) away from the conveying ring cavity (4) extend through one side of the inner wall of the conveying ring cavity (4) to the interior of the fastening groove block (3), and the ends of the extrusion rods (703) away from the conveying ring cavity (4) are arranged in an arc.

10. An adjustable femoral model bone micromotion experimental device according to claim 5, characterized in that: Two conveying cavities (1201) are located on the front side of the adjusting assembly (6). The surfaces of the two corresponding pushing blocks (1202) are in close contact with the inner wall of the corresponding conveying cavity (1201). The two pushing blocks (1202) are located at the center inside the conveying cavity (1201). One end of the push rod (1203) extends through one side of the inner wall of the conveying cavity (1201) to the surface of the fastening groove block (3). A rotating block (13) for rotation is fixedly installed at the end of the push rod (1203) away from the fastening groove block (3). Two corresponding ventilating vertical pipes (1204) are located at the ends of the conveying cavity (1201).

Images