A bionic prosthetic mechanical foot

Abstract

The present invention relates to the technical field of mechanical feet, and in particular to a bionic prosthetic mechanical foot, comprising a support frame, wherein the top of the support frame is fixedly connected to a limit rod, and the limit rod is internally movably connected to a rotating shaft. Through the cooperation between structures such as a clamping block assembly, a rotating assembly, a second inclined block and a first connecting rod, it is convenient for a user to adjust his or her center of gravity after the sole of the foot is stuck, thereby reducing the risk of the user falling. The two sides of the second inclined block are inclined, so that the second inclined block is convenient to squeeze the first inclined block upward after contacting the ground, and then the rotating cylinder rotates, and the push block squeezes the slider to move under the action of an external force, so that the slider is released from the clamping connection with the support frame, and then the rotating shaft drives the first connecting rod to rotate, so that the leg fixing cylinder drives the upper limbs of the user to move, and then after the sole of the foot is stuck, the center of gravity of the user is adjusted, thereby reducing the risk of the user falling.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical feet, and in particular to a bionic prosthetic mechanical foot. Background Art

[0002] Bionic prosthetic mechanical feet are high-tech devices used to replace lost limbs, designed to mimic the function and movement of a natural foot. They often combine advanced materials and technologies, such as sensors, microcontrollers, and electric motors, to enable more natural gait and movement.

[0003] Existing bionic prosthetic mechanical feet generally use electric motors as power sources, and convert the rotational motion of the motor into linear or rotational motion of the mechanical foot through transmission mechanisms such as gears, screws and connecting rods. However, when patients use the mechanical foot and encounter bumpy or gappy roads, they may accidentally get the sole of the mechanical foot stuck in the gap or pothole, making it impossible for the prosthetic mechanical foot to move according to the normal movement pattern, making it difficult for the user to regain balance by adjusting the pace or posture. Therefore, the center of gravity of the patient's body will suddenly shift. If the center of gravity shifts beyond the range that the body can adjust itself, it will easily cause tipping, thereby reducing the safety of the device. Therefore, a bionic prosthetic mechanical foot is proposed to solve the problems raised in the background technology. Summary of the invention

[0004] In order to solve the problems raised in the above-mentioned background technology, the present invention provides a bionic prosthetic mechanical foot, which has the advantage of facilitating the patient to adjust his or her center of gravity after the sole of the mechanical foot is stuck, thereby improving the overall safety and stability of the mechanical foot device.

[0005] A bionic prosthetic mechanical foot comprises a support frame, the top of the support frame is fixedly connected to a limit rod, the limit rod is movably connected to a rotating shaft inside, both ends of the rotating shaft are movably connected to block assemblies, the inner ring of the support frame is provided with a rotating assembly at 180 degrees, the inner part of the support frame is movably connected to a first inclined block, the inner part of the support frame is movably connected to second inclined blocks located on both sides of the first inclined block, a second spring is fixedly connected between the two second inclined blocks, the top of the first inclined block is fixedly connected to a support plate, the top of the support plate is provided with two tooth plates, the outer part of the rotating shaft is fixedly connected to a first connecting rod, the inner part of the support frame is provided with a buffer assembly, the top of the first connecting rod is fixedly connected to a leg fixing tube, the inner part of the leg fixing tube is provided with a gasket, and the bottom of the support frame is fixedly connected to the sole of the foot;

[0006] The rotating assembly comprises a rotating drum, the inner wall of which is provided with guide grooves in an annular shape of 180 degrees, a push block is movably connected inside the rotating drum, and a gear is fixedly connected to the outer wall of the rotating drum.

[0007] Preferably, the block assembly comprises a slider, a limit block is arranged on the outer wall of the slider, a first spring fixedly connected to the rotating shaft is fixedly connected inside the slider, and the first spring is used to squeeze the slider and keep the two sliders moving in opposite directions.

[0008] Preferably, the slider is initially inserted into the interior of the drum, the inner wall of the slider is provided with protrusions at 90 degrees, the outer wall of the shaft is provided with a slide groove matching the protrusion, and the slide groove is used to limit the circumferential position of the slider when the shaft rotates.

[0009] Preferably, the guide groove has an arc of ninety degrees, the outer wall of the push block is provided with a protruding rod in an annular shape of one hundred and eighty degrees, the protruding rod is movably clamped in the inside of the guide groove, and the inner wall of the rotating drum is provided with a cross notch adapted to the limit block.

[0010] Preferably, a cross clamping block is provided on the side of the push block away from the protruding rod, the cross clamping block moves inside the cross notch, and the side of the push block away from the protruding rod abuts against one side of the limit block in the initial state.

[0011] Preferably, both ends of the bottom of the first inclined block are inclined, the opposite ends of the two second inclined blocks pass through the outer wall of the support frame and extend to the outside of the second inclined blocks, the second inclined blocks are parallelogram-shaped, and the two ends of the bottom of the first inclined block are respectively abutted against the opposite sides of the two second inclined blocks.

[0012] Preferably, the second spring is used to squeeze the second inclined block and keep the two second inclined blocks moving in opposite directions. The tooth plate is meshed with the gear. A spring plate is fixedly connected to the top of the tooth plate. The tooth plate is elastically connected to the support frame through the spring plate.

[0013] Preferably, the first connecting rod rotates with the rotating shaft as the axis, the gasket is made of rubber material, the buffer assembly includes a cylinder, the interior of the cylinder is movably connected to a piston rod, and the top end of the piston rod is hinged to the second connecting rod.

[0014] Preferably, the top of the piston rod passes through the outer wall of the support frame and extends to the outside of the support frame, and the bottom of the piston rod is fixedly connected to a third spring fixed to the cylinder, and the third spring is used to squeeze the piston rod and keep the piston rod moving upward.

[0015] Preferably, the inner wall of the first connecting rod is provided with straight slots on both sides of the second connecting rod, and one end of the second connecting rod away from the piston rod is movably connected inside the straight slot, and when the first connecting rod rotates, one end of the second connecting rod is driven to slide inside the straight slot.

[0016] Working principle and working process of the present invention:

[0017] When the sole of the foot is stuck in a pit or a gap, the support frame drives the inclined surface of the second inclined block to abut against the ground, thereby squeezing the two second inclined blocks to move toward each other. While the second inclined block moves, it squeezes the first inclined block to move upward, so that the first inclined block drives the two toothed plates to move upward through the support plate, and then, through the cooperation between the toothed plates and the gears, the toothed plates drive the two gears to rotate when they move up, and then the gears drive the rotating drum to rotate. While the rotating drum rotates, it drives the convex rod to slide along the trajectory of the guide groove, thereby driving the push block to move in the direction of the rotating shaft, and then the cross block on one side of the push block squeezes the slider to move in the direction of the rotating shaft. When the convex block on the inner wall of the slider abuts against the inner wall of the slide groove, the push block squeezes the slider to move to the outside of the support frame, so that the slider is released from the clamping connection with the support frame;

[0018] After the slider is unfastened, the first connecting rod rotates with the rotating shaft as the axis. When the first connecting rod rotates, the leg fixing cylinder at the top thereof is driven to rotate. When the sole of the foot and the support frame cannot move normally, the force and inertia generated by the rotation of the leg fixing cylinder can help the user to offset the tendency of the body to fall forward or lose balance. Then the leg fixing cylinder drives the upper limbs of the user to move, thereby adjusting the position and posture of the upper body, so that the overall center of gravity of the user can be kept within a relatively stable range, avoiding excessive displacement of the center of gravity due to the sole of the foot being stuck, thereby reducing the risk of the user falling after the sole of the foot is stuck;

[0019] When the first connecting rod rotates, it drives the second connecting rod to rotate, and makes one end of the second connecting rod slide along the track of the straight slot. Then, when the second connecting rod rotates, it drives the piston rod downward, so that the piston rod squeezes the third spring, and then the rotation speed of the first connecting rod is slowed down by the piston rod, so as to prevent the user from being injured due to the first connecting rod rotating too fast, thereby improving the overall safety and stability of the prosthetic mechanical foot.

[0020] Beneficial effects of the present invention:

[0021] The present invention cooperates with structures such as the clamping block assembly, the rotating assembly, the second inclined block and the first connecting rod, so that it is convenient for the user to adjust his or her center of gravity after the sole of the foot is stuck, thereby reducing the risk of the user falling. The two sides of the second inclined block are inclined, so that the second inclined block can squeeze the first inclined block upward after contacting the ground, and then the first inclined block drives the tooth plate upward through the support plate, and drives the rotating drum to rotate under the cooperation of the tooth plate and the gear. While the rotating drum rotates, the push block squeezes the slider to move under the action of external force, so that the slider is released from the clamping connection with the support frame, and then the rotating shaft drives the first connecting rod to rotate. Through the rotation of the first connecting rod, the leg fixing tube drives the user's upper limbs to move, and then the user's center of gravity is adjusted after the sole of the foot is stuck, thereby reducing the risk of the user falling.

[0022] The present invention buffers the force generated when the leg fixing tube rotates through the cooperation between structures such as the piston rod, the third spring, the second connecting rod and the straight slot, thereby improving the overall safety and stability of the mechanical foot. When the first connecting rod rotates, one end of the second connecting rod slides inside the straight slot, thereby compensating for the length difference between the first connecting rod and the second connecting rod when the first connecting rod rotates. Then the second connecting rod drives the piston rod downward to squeeze the third spring. While the third spring is squeezed, the force and speed generated when the first connecting rod rotates are buffered, thereby reducing the reaction force on the user when the first connecting rod drives the leg fixing tube to rotate, thereby reducing the risk of injury to the user, thereby improving the overall safety and stability of the prosthetic mechanical foot. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the positional relationship among the rotating shaft, the block assembly, the rotating assembly and the tooth plate of the present invention;

[0025] Figure 3 It is a schematic diagram of the front cross-section structure of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0027] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0028] Figure 6 An exploded view of the rotating shaft of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0030] Figure 8 It is a schematic diagram of the top cross-section structure of the rotating shaft, the clamping block assembly and the rotating assembly of the present invention;

[0031] Fig. 9 It is a schematic diagram of the side sectional structure of the present invention.

[0032] In the figure: 1. support frame; 2. limit rod; 3. rotating shaft; 4. block assembly; 401. slider; 402. limit block; 403. first spring; 404. slide groove; 5. rotating assembly; 501. rotating cylinder; 502. guide groove; 503. push block; 504. protruding rod; 505. gear; 6. first inclined block; 7. second inclined block; 8. second spring; 9. supporting plate; 10. tooth plate; 11. spring piece; 12. first connecting rod; 13. buffer assembly; 1301. cylinder; 1302. piston rod; 1303. third spring; 1304. second connecting rod; 1305. straight notch; 14. leg fixing cylinder; 15. gasket; 16. sole. DETAILED DESCRIPTION

[0033] See also Figures 1 to 9 Shown is an embodiment of the present invention.

[0034] A bionic prosthetic mechanical foot comprises a support frame 1, a limit rod 2 is fixedly connected to the top of the support frame 1, a rotating shaft 3 is movably connected inside the limit rod 2, a clamping block assembly 4 is movably connected to both ends of the rotating shaft 3, a rotating assembly 5 is provided in an annular manner at 180 degrees inside the support frame 1, a first inclined block 6 is movably connected inside the support frame 1, a second inclined block 7 located on both sides of the first inclined block 6 is movably connected inside the support frame 1, a second spring 8 is fixedly connected between the two second inclined blocks 7, a support plate 9 is fixedly connected to the top of the first inclined block 6, two tooth plates 10 are arranged on the top of the support plate 9, a first connecting rod 12 is fixedly connected to the outside of the rotating shaft 3, a buffer assembly 13 is arranged inside the support frame 1, a leg fixing tube 14 is fixedly connected to the top of the first connecting rod 12, a gasket 15 is arranged inside the leg fixing tube 14, and a sole 16 is fixedly connected to the bottom of the support frame 1;

[0035] The rotating assembly 5 includes a rotating drum 501 , the inner wall of which is provided with a guide groove 502 at an angle of 180 degrees, a push block 503 is movably connected inside the rotating drum 501 , and a gear 505 is fixedly connected to the outer wall of the rotating drum 501 .

[0036] The two sides of the second inclined block 7 are inclined, so that the second inclined block 7 can squeeze the first inclined block 6 upward after contacting the ground, and then the first inclined block 6 drives the tooth plate 10 upward through the support plate 9, and drives the rotating drum 501 to rotate under the cooperation of the tooth plate 10 and the gear 505. While the rotating drum 501 rotates, the push block 503 squeezes the slider 401 to move under the action of external force, so that the slider 401 is released from the clamping connection with the support frame 1, and then the shaft 3 drives the first connecting rod 12 to rotate. Through the rotation of the first connecting rod 12, the leg fixing tube 14 drives the user's upper limbs to move, and then after the sole 16 is stuck, the user's center of gravity is adjusted, thereby reducing the risk of the user falling.

[0037] like Figures 2 to 4 , Figures 6 to 8 As shown, the block assembly 4 includes a slider 401, and a limit block 402 is arranged on the outer wall of the slider 401. A first spring 403 fixedly connected to the interior of the slider 401 is fixedly connected. The first spring 403 is used to squeeze the slider 401 and keep the two sliders 401 moving in opposite directions. The slider 401 is initially inserted into the interior of the rotating drum 501. A protrusion is arranged on the inner wall of the slider 401 at an angle of 90 degrees. A slide groove 404 cooperating with the protrusion is provided on the outer wall of the rotating shaft 3. The slide groove 404 is used to limit the circumferential position of the slider 401 when the rotating shaft 3 rotates. The arc of the guide groove 502 is 90 degrees. A protrusion 504 is arranged on the outer wall of the push block 503 at an angle of 180 degrees. The protrusion 504 is movably connected to the interior of the guide groove 502. A cross notch adapted to the limit block 402 is provided on the inner wall of the rotating drum 501.

[0038] Through the design of the first spring 403, its function is that when the mechanical foot needs to be reset, the first connecting rod 12 drives the leg fixing cylinder 14 to rotate in the opposite direction with the rotating shaft 3 as the axis. When the leg fixing cylinder 14 is parallel to the first connecting rod 12, the slider 401 is inserted into the interior of the rotating cylinder 501 under the action of the elastic force of the first spring 403, thereby re-fixing the position of the first connecting rod 12 and ensuring the subsequent normal operation of the device.

[0039] like Figures 2 to 4 , Figures 6 to 8 As shown, a cross block is provided on the side of the push block 503 away from the protruding rod 504, and the cross block moves inside the cross groove. In the initial state, the side of the push block 503 away from the protruding rod 504 abuts against one side of the limit block 402, and both ends of the bottom of the first inclined block 6 are inclined, and the opposite ends of the two second inclined blocks 7 pass through the outer wall of the support frame 1 and extend to the outside of the second inclined blocks 7. The second inclined blocks 7 are in the shape of a parallelogram, and the two ends of the bottom of the first inclined block 6 abut against the opposite sides of the two second inclined blocks 7 respectively. The second spring 8 is used to squeeze the second inclined blocks 7 and keep the two second inclined blocks 7 in an opposite direction of movement. The tooth plate 10 is meshed with the gear 505, and the top of the tooth plate 10 is fixedly connected with a spring plate 11, and the tooth plate 10 is elastically connected to the support frame 1 through the spring plate 11.

[0040] Through the design of the second spring 8 and the spring sheet 11, its function is that when the user takes the sole 16 out of the gap under the action of external force, at this time, the two second inclined blocks 7 move oppositely under the action of the elastic force of the second spring 8, and while the second inclined block 7 is reset, the squeezing of the first inclined block 6 is released, and then the tooth plate 10 moves downward under the action of the elastic force of the spring sheet 11, thereby driving the support plate 9 and the first inclined block 6 to reset through the tooth plate 10, so as to facilitate the next use of the device, and while the tooth plate 10 moves downward, the gear 505 drives the rotating drum 501 to rotate in the opposite direction, so that the push block 503 is reset, so as to facilitate the slider 401 to be re-stuck into the interior of the rotating drum 501.

[0041] like Figure 5 and Fig. 9 As shown, the first connecting rod 12 rotates with the rotating shaft 3 as the axis, the gasket 15 is made of rubber material, and the buffer component 13 includes a cylinder 1301, and the interior of the cylinder 1301 is movably connected to a piston rod 1302, and the top end of the piston rod 1302 is hinged to a second connecting rod 1304.

[0042] The gasket 15 is made of rubber material. Its function is that the rubber gasket can increase the friction between the leg fixing tube 14 and the user's leg, so that the mechanical foot is not easy to slide or shift during use, thereby improving the overall stability and safety of the prosthetic mechanical foot. At the same time, rubber also has a certain softness and elasticity. Therefore, the gasket 15 can reduce the direct pressure of the leg fixing tube 14 on the user's leg, thereby reducing the user's discomfort, especially when used for a long time, which can make the user more comfortable.

[0043] like Figure 5 and Fig. 9 As shown, the top of the piston rod 1302 passes through the outer wall of the support frame 1 and extends to the outside of the support frame 1. The bottom of the piston rod 1302 is fixedly connected to a third spring 1303 fixedly connected to the cylinder 1301. The third spring 1303 is used to squeeze the piston rod 1302 and keep the piston rod 1302 moving upward. The inner wall of the first connecting rod 12 is provided with straight slots 1305 located on both sides of the second connecting rod 1304. One end of the second connecting rod 1304 away from the piston rod 1302 is movably clamped in the inside of the straight slot 1305. When the first connecting rod 12 rotates, it drives one end of the second connecting rod 1304 to slide in the inside of the straight slot 1305.

[0044] When the first connecting rod 12 rotates, one end of the second connecting rod 1304 slides inside the straight slot 1305, thereby compensating for the length difference between the first connecting rod 12 and the second connecting rod 1304 when the first connecting rod 12 rotates. Then, the second connecting rod 1304 drives the piston rod 1302 to move downward, thereby squeezing the third spring 1303. While the third spring 1303 is squeezed, the force and speed generated by the rotation of the first connecting rod 12 are buffered, thereby reducing the reaction force generated on the user when the first connecting rod 12 drives the leg fixing tube 14 to rotate, thereby reducing the risk of injury to the user, thereby improving the overall safety and stability of the prosthetic mechanical foot.

[0045] The working principle and working process of this embodiment:

[0046] When the sole 16 is stuck in the pit or gap, the support frame 1 drives the inclined surface of the second inclined block 7 to abut against the ground, thereby squeezing the two second inclined blocks 7 to move toward each other. While the second inclined block 7 moves, the first inclined block 6 is squeezed to move upward, so that the first inclined block 6 drives the two tooth plates 10 to move upward through the support plate 9. Subsequently, through the cooperation between the tooth plates 10 and the gear 505, the tooth plates 10 drive the two gears 505 to rotate when moving upward, and then drive the rotating drum 501 to rotate through the gear 505. While the rotating drum 501 rotates, it drives the protruding rod 504 to slide along the trajectory of the guide groove 502, thereby driving the push block 503 to move in the direction of the rotating shaft 3, and then the cross block on one side of the push block 503 squeezes the slider 401 to move in the direction of the rotating shaft 3. When the protrusion on the inner wall of the slider 401 abuts against the inner wall of the slide groove 404, the push block 503 squeezes the slider 401 to move to the outside of the support frame 1, so that the slider 401 is released from the clamping connection with the support frame 1;

[0047] After the slider 401 is released from the clamping, the first connecting rod 12 rotates with the rotating shaft 3 as the axis. When the first connecting rod 12 rotates, the leg fixing tube 14 at its top is driven to rotate. When the sole 16 and the support frame 1 cannot move normally, the force and inertia generated by the rotation of the leg fixing tube 14 can help the user to offset the tendency of the body to fall forward or lose balance. Then the leg fixing tube 14 drives the upper limbs of the user to move, thereby adjusting the position and posture of the upper part of the body, so that the overall center of gravity of the user can be kept within a relatively stable range, avoiding excessive displacement of the center of gravity due to the sole 16 being stuck, thereby reducing the risk of the user falling after the sole 16 is stuck;

[0048] When the first connecting rod 12 rotates, it drives the second connecting rod 1304 to rotate, and makes one end of the second connecting rod 1304 slide along the track of the straight slot 1305. Then, when the second connecting rod 1304 rotates, it drives the piston rod 1302 to move downward, so that the piston rod 1302 squeezes the third spring 1303, and then the rotation speed of the first connecting rod 12 is slowed down by the piston rod 1302, so as to prevent the user from being injured due to the first connecting rod 12 rotating too fast, thereby improving the overall safety and stability of the prosthetic mechanical foot.

Claims

1. A bionic prosthetic mechanical foot, comprising a support frame (1), characterized in that: The top of the support frame (1) is fixedly connected to a limit rod (2), the limit rod (2) is internally movably connected to a rotating shaft (3), both ends of the rotating shaft (3) are movably connected to block assemblies (4), the inner ring of the support frame (1) is provided with a rotating assembly (5) at 180 degrees, the inner part of the support frame (1) is movably connected to a first inclined block (6), the inner part of the support frame (1) is movably connected to second inclined blocks (7) located on both sides of the first inclined block (6), a second spring (8) is fixedly connected between the two second inclined blocks (7), the top of the first inclined block (6) is fixedly connected to a support plate (9), and the top of the support plate (9) is provided with two teeth. The support frame (1) comprises a plate (10), a first connecting rod (12) fixedly connected to the outside of the rotating shaft (3), a buffer assembly (13) arranged inside the support frame (1), a leg fixing tube (14) fixedly connected to the top of the first connecting rod (12), a gasket (15) arranged inside the leg fixing tube (14), and a foot sole (16) fixedly connected to the bottom of the support frame (1); both ends of the bottom of the first inclined block (6) are inclined, the opposite ends of the two second inclined blocks (7) penetrate the outer wall of the support frame (1), the second inclined blocks (7) are parallelogram-shaped, and the two ends of the bottom of the first inclined block (6) are respectively in contact with the opposite sides of the two second inclined blocks (7); The rotating assembly (5) comprises a rotating drum (501), the inner wall of the rotating drum (501) is provided with a guide groove (502) in an annular manner at 180 degrees, a push block (503) is movably connected inside the rotating drum (501), and a gear (505) is fixedly connected to the outer wall of the rotating drum (501).

2. The bionic prosthetic mechanical foot according to claim 1, characterized in that: The block assembly (4) comprises a slider (401), the outer wall of the slider (401) is provided with a limit block (402), the interior of the slider (401) is fixedly connected with a first spring (403) fixedly connected to the rotating shaft (3), and the first spring (403) is used to squeeze the slider (401) and keep the two sliders (401) moving in opposite directions.

3. The bionic prosthetic mechanical foot according to claim 2, characterized in that: The slider (401) is initially inserted into the interior of the rotating drum (501), the inner wall of the slider (401) is provided with protrusions at 90 degrees in an annular manner, and the outer wall of the rotating shaft (3) is provided with a slide groove (404) that matches the protrusion, and the slide groove (404) is used to limit the circumferential position of the slider (401) when the rotating shaft (3) rotates.

4. The bionic prosthetic mechanical foot according to claim 2, characterized in that: The guide groove (502) has an arc of 90 degrees, and a protruding rod (504) is provided on the outer wall of the push block (503) at an angle of 180 degrees. The protruding rod (504) is movably engaged in the guide groove (502), and a cross notch matching the limit block (402) is provided on the inner wall of the rotating drum (501).

5. The bionic prosthetic mechanical foot according to claim 4, characterized in that: A cross clamping block is provided on the side of the push block (503) away from the protruding rod (504), and the cross clamping block moves inside the cross notch. In the initial state, the side of the push block (503) away from the protruding rod (504) abuts against one side of the limit block (402).

6. The bionic prosthetic mechanical foot according to claim 1, characterized in that: The second spring (8) is used to squeeze the second inclined block (7) and keep the two second inclined blocks (7) moving in opposite directions. The tooth plate (10) is meshed with the gear (505). A spring plate (11) is fixedly connected to the top of the tooth plate (10). The tooth plate (10) is elastically connected to the support frame (1) via the spring plate (11).

7. The bionic prosthetic mechanical foot according to claim 1, characterized in that: The first connecting rod (12) rotates with the rotating shaft (3) as the axis, the gasket (15) is made of rubber material, and the buffer component (13) includes a cylinder (1301), the interior of the cylinder (1301) is movably connected to a piston rod (1302), and the top end of the piston rod (1302) is hinged to a second connecting rod (1304).

8. The bionic prosthetic mechanical foot according to claim 7, characterized in that: The top of the piston rod (1302) passes through the outer wall of the support frame (1) and extends to the outside of the support frame (1). The bottom of the piston rod (1302) is fixedly connected to a third spring (1303) fixed to the cylinder (1301). The third spring (1303) is used to squeeze the piston rod (1302) and keep the piston rod (1302) moving upward.

9. The bionic prosthetic mechanical foot according to claim 1, characterized in that: The inner wall of the first connecting rod (12) is provided with straight slots (1305) located on both sides of the second connecting rod (1304); one end of the second connecting rod (1304) away from the piston rod (1302) is movably engaged inside the straight slot (1305); when the first connecting rod (12) rotates, one end of the second connecting rod (1304) is driven to slide inside the straight slot (1305).

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