Bionic artificial interphalangeal joint

Abstract

A bionic artificial interphalangeal joint relates to the technical field of artificial joints and comprises a first bionic finger and a second bionic finger, a second joint body is fixedly mounted in one side of the second bionic finger, and a first joint body positioned in the second bionic finger is fixedly mounted on one side of the first bionic finger; an inserting rod can penetrate through the first joint body to enter the interior of the second joint body, finally, a first extrusion block pushes the inserting rod to enter the interior of the first joint body through a driving motor, then the first joint body can be fixed into the interior of the second bionic finger, and then the mounting convenience is improved; the first bionic finger and the second bionic finger do not need external tedious fasteners such as screws and nuts, so that the installation process is simplified, and meanwhile, the fixing mode also ensures that the first joint body and the second joint body can keep enough supporting force and can also realize smooth motion trails when the first bionic finger and the second bionic finger execute complex actions.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial joints, and in particular to a bionic artificial interphalangeal joint. Background Art

[0002] Bionic artificial interphalangeal joints are usually installed in bionic hands as one of the key components of bionic hands. The design of bionic hands is inspired by human hands and aims to simulate and replace the functions of human hands to help people with hand dysfunction or amputation patients restore their hand mobility in daily life and work; At present, in the installation practice of bionic artificial interphalangeal joints, the traditional fixing method mainly relies on pins or bolt connections. Although this method performs well in terms of stability and structural strength, its installation process has obvious efficiency bottlenecks. Specifically, this installation mode often requires the operator to accurately align the interface between the joints, and then use external auxiliary tools such as wrenches, screwdrivers or specific clamps to tighten the bolts one by one or insert and fix the pins. This process not only requires the operator to have high professional skills and patience to ensure the accuracy of the installation and the smooth operation of the joints, but also because of the repeated use of auxiliary tools and adjustment actions, the installation time is invisibly increased and the overall efficiency is reduced. Summary of the invention

[0003] In order to solve the problem in the above background technology that external auxiliary tools are needed to reduce installation efficiency, the present invention provides a bionic artificial interphalangeal joint.

[0004] A bionic artificial interphalangeal joint comprises a first bionic finger and a second bionic finger, wherein a second joint body is fixedly installed inside one side of the second bionic finger, and a first joint body located inside the second bionic finger is fixedly installed on one side of the first bionic finger; A fixing mechanism is arranged inside the second bionic finger, the fixing mechanism includes a fixing groove, the fixing groove is opened inside the second bionic finger, a first spring is fixedly installed in the inner cavity of the fixing groove, a first moving block is fixedly installed on one side of the first spring, a plug rod is fixedly installed on the side of the first moving block close to the surface of the second joint body, a first extrusion block is slidably connected inside the fixing groove, a motor is fixedly installed in the inner cavity of the fixing groove, a first screw rod is fixedly installed at the output end of the motor, a connecting plate is threadedly connected to the surface of the first screw rod, and one side of the connecting plate is fixedly connected to the surface of the first extrusion block, and a square plate is fixedly installed on one side of the connecting plate.

[0005] It also includes: a supporting mechanism, which is arranged in the inner cavity of the fixed groove, the supporting mechanism includes a second spring, the second spring is fixedly connected to the inner cavity of the fixed groove, a connecting block is fixedly installed on the bottom end of the second spring, a slot is opened on one side of the top of the square plate, a third spring is fixedly installed on one side of the connecting block, and an insert plate located inside the slot is fixedly installed on the other end of the third spring, an L-shaped plate is fixedly installed on one side of the square plate, and a second extrusion block is fixedly installed on the top of the L-shaped plate.

[0006] It also includes: a lubrication mechanism, which is arranged inside the second bionic finger, the lubrication mechanism includes a liquid storage tank, the liquid storage tank is fixedly connected to the inside of the second bionic finger, a drainage pipe is fixedly installed on one side of the liquid storage tank, and the other end of the drainage pipe passes through the side of the second bionic finger close to the surface of the second joint body, the inner cavity of the liquid storage tank is rotatably connected to the second lead screw, the surface of the second lead screw is threadedly connected to the second moving block, the bottom end of the second moving block is fixedly installed with a blocking plate, the inside of the liquid storage tank is fixedly installed with a partition plate, the top of the second lead screw is fixedly installed with a rotating column located at the top of the partition plate, a sliding groove is opened on the surface of the rotating column, and a pressing shell is slidably sleeved on the surface of the rotating column, and a fourth spring is elastically connected to the side of the pressing shell opposite to the partition plate, and the inside of the pressing shell is rollingly connected with a sliding block located inside the sliding groove.

[0007] The inner cavity of the liquid storage box is fixedly installed with a limiting rod located inside the blocking plate. The limiting rod is designed to be longitudinally symmetrical about the center of the blocking plate, and the surface of the limiting rod is designed to be smooth.

[0008] A positioning groove is provided on the side of the first joint body away from the surface of the second joint body, a fifth spring is fixedly installed inside the second bionic finger, and a positioning block located inside the positioning groove is fixedly installed on the side of the fifth spring close to the surface of the second joint body.

[0009] The positioning block is designed to be semicircular and is designed to be transversely symmetrical about the center of the second joint body.

[0010] The opposite sides of the first moving block and the first extruding block are both designed as inclined surfaces, and the inclined surfaces of the first moving block and the first extruding block are parallel to each other.

[0011] The sliding block is of spherical design, and the surface of the sliding block fully fits the inner wall of the sliding groove.

[0012] A through hole is formed on the surface of the first extrusion block, and the size of the through hole is larger than the first screw rod.

[0013] One side of the inner wall of the slot is chamfered, and the bottom end of the plug board is chamfered.

[0014] Working principle and working process of the present invention: First, the operator can insert the first joint body into the second bionic finger. While inserting, the second joint body will enter the first joint body. Then, the surface of the first joint body will contact the surface of the positioning block. After the positioning groove is aligned with the positioning block, the compressed fifth spring will push the positioning block into the positioning groove to complete the positioning. After the positioning is completed, the motor can be driven to rotate the first screw rod. When the first screw rod rotates, the first extrusion block, the connecting plate and the square plate will move on the surface of the first screw rod. Then, the surface of the connecting plate will contact the surface of the first moving block and will squeeze and push the first moving block and the insertion rod to move. When the first moving block moves, the first spring will be stretched, and then the insertion rod will pass through the first joint body and enter the second joint body. Then, the first joint body can be fixed inside the second bionic finger. When the square plate moves, it will pull the L-shaped plate and the second extrusion block to move, and then the surface of the second extrusion block will contact the top of the connecting block, which will push the connecting block down. When the connecting block is down, the second spring will be stretched, and then the connecting block will drive the third spring and the plug-in plate to go down, and then the plug-in plate will enter the slot. When the plug-in plate enters the slot, the third spring will be compressed. Through the compression of the third spring, the plug-in plate can support the fixing mechanism. When lubrication is required for long-term work, the pressing shell can be pressed, and then the sliding block will roll inside the slide groove. Since the slide groove is designed to be inclined, when the sliding block moves, it will drive the rotating column and the second screw to rotate. When the second screw rotates, the second moving block and the sealing plate will move on the surface of the second screw, and then the sealing plate will cancel the blockage of the drain pipe, and then the artificial joint synovial fluid inside the liquid storage tank will enter the connection between the first joint body and the second joint body along the drain pipe, and then it can be lubricated, thereby increasing the service life of the equipment and finally completing the operation process.

[0015] Beneficial effects of the present invention: The present invention drives the first screw to rotate by driving a motor. When the first screw rotates, the first extrusion block, the connecting plate and the square plate will move on the surface of the first screw, and then the surface of the connecting plate will contact the surface of the first moving block, and will squeeze and push the first moving block and the insertion rod to move, and the insertion rod will pass through the first joint body and enter the interior of the second joint body. Finally, the first extrusion block is driven by the motor to push the insertion rod into the interior of the first joint body, and then the first joint body can be fixed to the interior of the second bionic finger, thereby improving the convenience of installation, without the need for external cumbersome fasteners such as screws and nuts, thereby simplifying the installation process. At the same time, this fixing method also ensures that when the first bionic finger and the second bionic finger perform complex movements, the first joint body and the second joint body can maintain sufficient support force and achieve a smooth and fluent motion trajectory; The present invention pulls the L-shaped plate and the second extrusion block to move when the square plate moves, and then the surface of the second extrusion block contacts the top of the connection block, which pushes the connection block down, and the connection block drives the third spring and the plug plate to go down, and then the plug plate enters the inside of the slot, and when the plug plate enters the inside of the slot, the third spring is compressed, and the compression of the third spring enables the plug plate to support the fixing mechanism, and finally the square plate links the L-shaped plate and the second extrusion block to move, and then the plug plate enters the inside of the slot, and then the plug plate can support, thereby improving the fixing effect of the fixing mechanism; The present invention presses the pressing shell, and then the sliding block will roll inside the sliding groove. Since the sliding groove is designed to be inclined, when the sliding block moves, it will drive the rotating column and the second screw to rotate. When the second screw rotates, the second moving block and the sealing plate will move on the surface of the second screw, and then the sealing plate will cancel the blockage of the drainage pipe. Then the artificial joint synovial fluid inside the liquid storage tank will enter the connection between the first joint body and the second joint body along the drainage pipe, and then it can be lubricated. Finally, by pressing the pressing shell, the sealing plate cancels the blockage of the drainage pipe, so that the operator can lubricate the first joint body and the second joint body, reduce the friction and wear between the first joint body and the second joint body, and then increase the service life of the first bionic finger and the second bionic finger. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the present invention; Figure 2 A schematic diagram showing a positioning block according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the interior of a fixing slot according to an embodiment of the present invention; Figure 4 is a cross-sectional schematic diagram of a second bionic finger according to an embodiment of the present invention; Figure 5 A cross-sectional schematic diagram of a connection block according to an embodiment of the present invention; Figure 6 A schematic diagram showing a lubrication mechanism according to an embodiment of the present invention; Figure 7 A schematic cross-sectional view of a liquid storage tank according to an embodiment of the present invention; Figure 8 A schematic diagram of a cross-sectional pressing shell according to an embodiment of the present invention; Fig. 9 for Figure 5 A is an enlarged schematic diagram.

[0017] In the figure: 1. the first bionic finger; 2. the second bionic finger; 3. the first joint body; 4. the second joint body; 5. the fixing groove; 6. the first spring; 7. the first moving block; 8. the plug rod; 9. the first extrusion block; 10. the connecting plate; 11. the motor; 12. the first screw rod; 13. the square plate; 14. the slot; 15. the second spring; 16. the connecting block; 17. the third spring; 18. the plug plate; 19. the L-shaped plate; 20. the second extrusion block; 21. the liquid storage tank; 22. the drain pipe; 23. the second screw rod; 24. the second moving block; 25. the blocking plate; 26. the rotating column; 27. the slide groove; 28. the pressing shell; 29. ​​the partition plate; 30. the fourth spring; 31. the sliding block; 32. the limit rod; 33. the positioning groove; 34. the fifth spring; 35. the positioning block. DETAILED DESCRIPTION

[0018] See also Figures 1 to 9 Shown is an embodiment of the present invention.

[0019] A bionic artificial interphalangeal joint comprises a first bionic finger 1 and a second bionic finger 2, wherein a second joint body 4 is fixedly installed inside one side of the second bionic finger 2, and a first joint body 3 located inside the second bionic finger 2 is fixedly installed on one side of the first bionic finger 1; A fixing mechanism is arranged inside the second bionic finger 2, and the fixing mechanism includes a fixing groove 5, which is opened inside the second bionic finger 2, and the inner cavity of the fixing groove 5 is fixedly installed with a first spring 6, and one side of the first spring 6 is fixedly installed with a first moving block 7, and the side of the first moving block 7 close to the surface of the second joint body 4 is fixedly installed with an insertion rod 8, and the interior of the fixing groove 5 is slidably connected with a first extrusion block 9, and the inner cavity of the fixing groove 5 is fixedly installed with a motor 11, and the output end of the motor 11 is fixedly installed with a first screw rod 12, and the surface of the first screw rod 12 is threadedly connected with a connecting plate 10, and one side of the connecting plate 10 is fixedly connected to the surface of the first extrusion block 9, and one side of the connecting plate 10 is fixedly installed with a square plate 13.

[0020] The operator inserts the first joint body 3 into the interior of the second bionic finger 2, and then the second joint body 4 is also inserted into the interior of the first joint body 3. After the positioning is completed, the motor 11 can be driven to rotate the first screw rod 12. Since the first screw rod 12 is threadedly connected to the connecting plate 10, when the first screw rod 12 rotates, the connecting plate 10 will move on the surface of the first screw rod 12, and then the connecting plate 10 will drive the first extrusion block 9 and the square plate 13 to move, and then the surface of the first extrusion block 9 will contact the surface of the first moving block 7, and will squeeze and push the first moving block 7 and the insertion rod 8 to move. When the first moving block 7 moves, the first spring 6 will be stretched, and then the surface of the insertion rod 8 will pass through the first joint body 3 and enter the second The first joint body 3 can be fixed inside the joint body 4 and then inside the second bionic finger 2. After the fixation is completed, the first bionic finger 1 and the second bionic finger 2 can be used normally. Finally, the first extrusion block 9 is driven by the motor 11 to push the insertion rod 8 into the first joint body 3, and then the first joint body 3 can be fixed inside the second bionic finger 2, thereby improving the convenience of installation. No external cumbersome fasteners such as screws and nuts are required, thereby simplifying the installation process. At the same time, this fixing method also ensures that when the first bionic finger 1 and the second bionic finger 2 perform complex movements, the first joint body 3 and the second joint body 4 can maintain sufficient supporting force and achieve a smooth and fluent motion trajectory.

[0021] like Figure 3 , Figure 4 , Figure 5 and Fig. 9 As shown, it also includes: a supporting mechanism, which is arranged in the inner cavity of the fixing groove 5, the supporting mechanism includes a second spring 15, the second spring 15 is fixedly connected to the inner cavity of the fixing groove 5, a connecting block 16 is fixedly installed on the bottom end of the second spring 15, a slot 14 is opened on one side of the top of the square plate 13, a third spring 17 is fixedly installed on one side of the connecting block 16, and an insert plate 18 located inside the slot 14 is fixedly installed on the other end of the third spring 17, an L-shaped plate 19 is fixedly installed on one side of the square plate 13, and a second extrusion block 20 is fixedly installed on the top of the L-shaped plate 19.

[0022] Through the design of the supporting mechanism, when the square plate 13 moves, the slot 14 will move along, and then the square plate 13 will link the L-shaped plate 19 and the second extrusion block 20 to move, and then the surface of the second extrusion block 20 will contact the top of the connecting block 16, and then it will squeeze and push the connecting block 16 down, and when the connecting block 16 descends, the second spring 15 will be stretched, and then the connecting block 16 will drive the third spring 17 and the plugging plate 18 to descend, and then the square plate 13 and the slot 14 will move to the bottom of the plugging plate 18, and the plugging plate 18 will enter the inside of the slot 14, and while entering the inside of the slot 14, the third spring 17 will be compressed, and through the compression of the third spring 17, the plugging plate 18 supports the fixing mechanism, and finally the square plate 13 links the L-shaped plate 19 and the second extrusion block 20 to move, and then the plugging plate 18 enters the inside of the slot 14, and then the plugging plate 18 can support, thereby improving the fixing effect of the fixing mechanism; When it is necessary to cancel the fixation of the first joint body 3, the motor 11 can be driven to make the first screw rod 12 rotate in the opposite direction, and then the connecting plate 10 will move in the opposite direction on the surface of the first screw rod 12, and the connecting plate 10 will pull the first extrusion block 9 away from the surface of the first moving block 7, and then the stretched first spring 6 will pull the first moving block 7 and the plug rod 8 to move, and then the first moving block 7 will move away from the inside of the first joint body 3, and when the connecting plate 10 moves in the opposite direction, the square plate 13 will move with it, and then the square plate 13 will push the plug plate 18 to move, and when the plug plate 18 moves, the third spring 17 will continue to be compressed, and then the plug plate 18 will not jam the movement of the connecting plate 10, and then the square plate 13 will drive the L-shaped plate 19 away from the surface of the connecting block 16, and then the stretched second spring 15 will pull the connecting block 16, the third spring 17 and the plug plate 18 to move upward, thereby canceling the support for the fixing mechanism.

[0023] The invention also includes: a lubrication mechanism, which is arranged inside the second bionic finger 2, the lubrication mechanism includes a liquid storage tank 21, the liquid storage tank 21 is fixedly connected to the inside of the second bionic finger 2, a drainage pipe 22 is fixedly installed on one side of the liquid storage tank 21, and the other end of the drainage pipe 22 passes through the side of the second bionic finger 2 close to the surface of the second joint body 4, the inner cavity of the liquid storage tank 21 is rotatably connected with a second lead screw 23, the surface of the second lead screw 23 is threadedly connected with a second moving block 24, the bottom end of the second moving block 24 is fixedly installed with a blocking plate 25, a partition plate 29 is fixedly installed inside the liquid storage tank 21, a rotating column 26 located at the top of the partition plate 29 is fixedly installed at the top of the second lead screw 23, a sliding groove 27 is opened on the surface of the rotating column 26, a pressing shell 28 is slidably sleeved on the surface of the rotating column 26, and a fourth spring 30 is elastically connected to the side of the pressing shell 28 opposite to the partition plate 29, and the interior of the pressing shell 28 is rollingly connected with a sliding block 31 located inside the sliding groove 27.

[0024] Through the design of the lubrication mechanism, when lubrication is needed between the first joint body 3 and the second joint body 4, the pressing shell 28 can be pressed. When the pressing shell 28 moves, the fourth spring 30 will be compressed, and then the pressing shell 28 will push the sliding block 31 to move inside the sliding groove 27. Since the sliding groove 27 is designed to be inclined, when the sliding block 31 moves, the rotating column 26 will rotate, and the rotating column 26 will drive the second lead screw 23 to rotate. Since the second lead screw 23 is threadedly connected to the second moving block 24, when the second lead screw 23 rotates, the second moving block 24 will move on the surface of the second lead screw 23. The second moving block 24 will pull the sealing plate 25 to move, and then the sealing plate 25 will cancel the blockage of the drainage pipe 22, and then the artificial joint synovial fluid inside the liquid storage tank 21 will flow along the drainage pipe 22 to the connection between the first joint body 3 and the second joint body 4, and then it can be lubricated, and finally the sealing plate 25 can cancel the blockage of the drainage pipe 22 by pressing the pressing shell 28, so that the operator can lubricate the first joint body 3 and the second joint body 4, reduce the friction and wear between the first joint body 3 and the second joint body 4, and then increase the service life of the first bionic finger 1 and the second bionic finger 2.

[0025] like Figure 8 As shown, a limiting rod 32 located inside the blocking plate 25 is fixedly installed in the inner cavity of the liquid storage tank 21. The limiting rod 32 is designed to be longitudinally symmetrical about the center of the blocking plate 25, and the surface of the limiting rod 32 is designed to be smooth.

[0026] Through the design of the limiting rod 32, when the blocking plate 25 moves, the blocking plate 25 will move on the surface of the limiting rod 32. Since the limiting rod 32 is symmetrically designed, the limiting rod 32 can limit the blocking plate 25, and the limiting rod 32 is smooth in design, so that the blocking plate 25 can move more smoothly.

[0027] like Figure 2 As shown, a positioning groove 33 is provided on the side of the first joint body 3 away from the surface of the second joint body 4, a fifth spring 34 is fixedly installed inside the second bionic finger 2, and a positioning block 35 located inside the positioning groove 33 is fixedly installed on the side of the fifth spring 34 close to the surface of the second joint body 4. The positioning block 35 is semicircular in design and is laterally symmetrical about the center of the second joint body 4.

[0028] Through the design of the positioning groove 33, the fifth spring 34 and the positioning block 35, when the first joint body 3 is inserted into the second bionic finger 2, the surface of the first joint body 3 will contact the surface of the positioning block 35, and then the positioning block 35 will be squeezed to shrink into the second bionic finger 2, and then the positioning block 35 will squeeze the fifth spring 34. After the positioning groove 33 is aligned with the positioning block 35, the compressed fifth spring 34 will push the positioning block 35 into the interior of the positioning groove 33, thereby completing the positioning, so as to facilitate the insertion rod 8 to pass through the first joint body 3 and enter the interior of the second joint body 4. Through the design of the positioning block 35, since the positioning block 35 is a semicircular design, it is convenient for the first joint body 3 to squeeze the positioning block 35 to move, and the positioning block 35 is a symmetrical design, thereby improving the positioning effect.

[0029] like Figure 3 and Figure 8 As shown, the opposite sides of the first moving block 7 and the first extrusion block 9 are both designed with inclined surfaces, and the inclined surfaces of the first moving block 7 and the first extrusion block 9 are parallel to each other. The sliding block 31 is designed as a spherical shape, and the surface of the sliding block 31 fully fits with the inner wall of the slide groove 27.

[0030] Through the design of the first moving block 7 and the first extrusion block 9, since the opposite sides of the first moving block 7 and the first extrusion block 9 are both inclined, when the first extrusion block 9 moves to extrude the first moving block 7, the resistance generated by the extrusion can be reduced, thereby facilitating the first extrusion block 9 to extrude the first moving block 7 and move. Through the design of the sliding block 31, since the sliding block 31 is a spherical design, when the sliding block 31 moves, through the friction between the sliding block 31 and the slide groove 27, the sliding block 31 will roll inside the slide groove 27, thereby making the pressing shell 28 move more smoothly.

[0031] like Figure 5 and Fig. 9 As shown, a through hole is opened on the surface of the first extrusion block 9, and the size of the through hole is larger than the first screw rod 12, one side of the inner wall of the slot 14 is chamfered, and the bottom end of the insert plate 18 is chamfered.

[0032] Through the design of the first extrusion block 9, since a through hole is opened on the surface of the first extrusion block 9, and the size of the through hole is larger than the first screw rod 12, when the first extrusion block 9 is reset, the first screw rod 12 will enter the inside of the through hole, and the first screw rod 12 will not interfere with the movement of the first extrusion block 9. Through the design of the slot 14 and the plug plate 18, since one side inside the slot 14 and the bottom end of the plug plate 18 are both chamfered, the stability and accuracy of the plug plate 18 during the insertion process are ensured.

[0033] The working principle and working process of this embodiment: First, the operator can insert the first joint body 3 into the second bionic finger 2. While inserting, the second joint body 4 will enter the first joint body 3. Then, the surface of the first joint body 3 will contact the surface of the positioning block 35. After the positioning groove 33 is aligned with the positioning block 35, the compressed fifth spring 34 will push the positioning block 35 into the positioning groove 33, thereby completing the positioning. After the positioning is completed, the motor 11 can be driven to rotate the first screw rod 12. When the first screw rod 12 rotates, the first extrusion block 9, the connecting plate 10 and the square plate 13 will move on the surface of the first screw rod 12. Then, the surface of the connecting plate 10 will contact the surface of the first moving block 7, and will squeeze and push the first moving block 7 and the insertion rod 8 to move. When the first moving block 7 moves, the first spring 6 will be stretched, and then the insertion rod 8 will pass through the first joint body 3 and enter the second joint body 4, thereby fixing the first joint body 3 inside the second bionic finger 2. When the square plate 13 moves, the L-shaped plate 19 and the second extrusion block 20 are pulled to move, and then the surface of the second extrusion block 20 contacts the top of the connection block 16, which pushes the connection block 16 down. When the connection block 16 is down, the second spring 15 is stretched, and then the connection block 16 drives the third spring 17 and the plug plate 18 to go down, and then the plug plate 18 enters the slot 14. When the plug plate 18 enters the slot 14, the third spring 17 is compressed, and the compression of the third spring 17 enables the plug plate 18 to support the fixing mechanism. When lubrication is required for long-term work, the pressing shell 28 can be pressed, and then the sliding block 31 will roll inside the slide groove 27. Since the slide groove 27 is designed to be inclined, when the sliding block 31 moves, it will drive the rotating column 26 and the second screw 23 to rotate. When the second screw 23 rotates, the second moving block 24 and the sealing plate 25 will move on the surface of the second screw 23, and then the sealing plate 25 will cancel the blockage of the drain pipe 22. Then the artificial joint synovial fluid inside the liquid storage tank 21 will enter the connection between the first joint body 3 and the second joint body 4 along the drain pipe 22, and then it can be lubricated, thereby increasing the service life of the equipment and finally completing the operation process.

Claims

1. A bionic artificial interphalangeal joint, comprising a first bionic finger (1) and a second bionic finger (2), characterized in that: A second joint body (4) is fixedly mounted inside one side of the second bionic finger (2), and a first joint body (3) located inside the second bionic finger (2) is fixedly mounted on one side of the first bionic finger (1); A fixing mechanism is arranged inside the second bionic finger (2), the fixing mechanism comprising a fixing groove (5), the fixing groove (5) being opened inside the second bionic finger (2), a first spring (6) being fixedly installed in the inner cavity of the fixing groove (5), a first moving block (7) being fixedly installed on one side of the first spring (6), an insertion rod (8) being fixedly installed on the side of the first moving block (7) close to the surface of the second joint body (4), a first extrusion block (9) being slidably connected inside the fixing groove (5), a motor (11) being fixedly installed in the inner cavity of the fixing groove (5), a first screw rod (12) being fixedly installed at the output end of the motor (11), a connecting plate (10) being threadedly connected to the surface of the first screw rod (12), one side of the connecting plate (10) being fixedly connected to the surface of the first extrusion block (9), and a square plate (13) being fixedly installed on one side of the connecting plate (10).

2. A bionic artificial interphalangeal joint according to claim 1, characterized in that: The invention also comprises: a supporting mechanism, which is arranged in the inner cavity of the fixing groove (5), the supporting mechanism comprising a second spring (15), the second spring (15) being fixedly connected to the inner cavity of the fixing groove (5), a connecting block (16) being fixedly mounted on the bottom end of the second spring (15), a slot (14) being provided on one side of the top end of the square plate (13), a third spring (17) being fixedly mounted on one side of the connecting block (16), an inserting plate (18) located inside the slot (14) being fixedly mounted on the other end of the third spring (17), an L-shaped plate (19) being fixedly mounted on one side of the square plate (13), and a second extrusion block (20) being fixedly mounted on the top end of the L-shaped plate (19).

3. The bionic artificial interphalangeal joint according to claim 1, characterized in that: The invention also comprises: a lubricating mechanism, which is arranged inside the second bionic finger (2), the lubricating mechanism comprising a liquid storage tank (21), the liquid storage tank (21) being fixedly connected to the inside of the second bionic finger (2), a liquid discharge pipe (22) being fixedly mounted on one side of the liquid storage tank (21), the other end of the liquid discharge pipe (22) passing through a side of the second bionic finger (2) close to the surface of the second joint body (4), the inner cavity of the liquid storage tank (21) being rotatably connected to a second screw rod (23), the surface of the second screw rod (23) being threadedly connected to a second moving block (24), the second moving block ( A sealing plate (25) is fixedly installed at the bottom end of the second lead screw (23), a partition plate (29) is fixedly installed inside the liquid storage tank (21), a rotating column (26) located at the top of the partition plate (29) is fixedly installed at the top end of the second lead screw (23), a sliding groove (27) is provided on the surface of the rotating column (26), a pressing shell (28) is slidably sleeved on the surface of the rotating column (26), a fourth spring (30) is elastically connected to the side of the pressing shell (28) opposite to the partition plate (29), and a sliding block (31) located inside the sliding groove (27) is rollingly connected inside the pressing shell (28).

4. A bionic artificial interphalangeal joint according to claim 3, characterized in that: The inner cavity of the liquid storage box (21) is fixedly mounted with a limit rod (32) located inside the blocking plate (25); the limit rod (32) is designed to be longitudinally symmetrical about the center of the blocking plate (25), and the surface of the limit rod (32) is designed to be smooth.

5. The bionic artificial interphalangeal joint according to claim 1, characterized in that: A positioning groove (33) is provided on a side of the first joint body (3) away from the surface of the second joint body (4); a fifth spring (34) is fixedly installed inside the second bionic finger (2); and a positioning block (35) located inside the positioning groove (33) is fixedly installed on a side of the fifth spring (34) close to the surface of the second joint body (4).

6. The bionic artificial interphalangeal joint according to claim 5, characterized in that: The positioning block (35) is designed to be semicircular, and the positioning block (35) is designed to be transversely symmetrical with respect to the center of the second joint body (4).

7. The bionic artificial interphalangeal joint according to claim 1, characterized in that: The opposite sides of the first moving block (7) and the first extrusion block (9) are both designed as inclined surfaces, and the inclined surfaces of the first moving block (7) and the first extrusion block (9) are parallel to each other.

8. The bionic artificial interphalangeal joint according to claim 3, characterized in that: The sliding block (31) is of spherical design, and the surface of the sliding block (31) fully fits the inner wall of the sliding groove (27).

9. The bionic artificial interphalangeal joint according to claim 1, characterized in that: A through hole is provided on the surface of the first extrusion block (9), and the size of the through hole is larger than the first screw rod (12).

10. The bionic artificial interphalangeal joint according to claim 2, characterized in that: One side of the inner wall of the slot (14) is chamfered, and the bottom end of the inserting plate (18) is chamfered.

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