3D printing forearm prosthesis

Abstract

The utility model relates to the technical field of artificial limbs, and discloses a 3D printing forearm artificial limb which comprises an inner receiving cavity and an outer receiving cavity, the surfaces of the inner receiving cavity and the outer receiving cavity are sleeved with upper artificial leather, and the surfaces of the inner receiving cavity and the outer receiving cavity are provided with air holes, a cover plate, a spring telescopic rod and a baffle. The device is reasonable in structure, a digital model of the forearm stump of a patient is obtained through CT scanning, the side appearance of the stump is obtained through mirror images, the comfort of an artificial limb socket and the appearance of the artificial limb are improved, the left clamp moves rightwards and the right clamp moves leftwards by rotating the positive and negative threaded lead screw, and therefore the left clamp and the right clamp clamp and fix the bolt. Meanwhile, the prosthetic hand is fixedly connected with the inner receiving cavity and the outer receiving cavity, a movable seat and a cleaning structure move downwards by rotating a fixed lead screw, sweat in the inner receiving cavity and the outer receiving cavity can be adsorbed while air holes can be cleaned through the cleaning structure, and heat in a heat conduction seat is discharged into heat dissipation phosphorus through a heat conduction pipe; and the heat is discharged from the vent holes through the heat dissipation phosphorus.

Description

Technical Field

[0001] The utility model relates to the technical field of prostheses, in particular to a 3D printed forearm prosthesis. Background Art

[0002] Upper limb amputees are often advised or self-request an upper limb prosthesis to improve the appearance and function of their lost limb. An upper limb prosthesis is an external device that replaces the function and appearance of a lost limb. Existing forearm fabrication technology is inefficient and inaccurate. Most forearm prostheses are still manufactured using the traditional process of taking a plaster cast, shaping the positive mold, molding with a high-temperature thermoplastic sheet (or resin), fitting the patient, fitting, and finally delivery. The fabrication and fitting process is cumbersome, and the comfort and success rate of the prosthesis are highly dependent on the prosthetist's clinical experience and skills. Inexperienced technicians can not only result in poor prosthetic quality and poor fit, extending the required fitting time, but also lead to skin abrasion, inflammation, and swelling. Traditional prosthesis fabrication also requires extensive machining equipment, such as a plaster shaping table and tools, a high-temperature thermoplastic heating box, an air compressor, grinding and polishing components, and a bench and tools.

[0003] A forearm prosthetic receiving cavity is disclosed in the Chinese utility model patent application disclosure specification CN210019815U. Although the device contacts the arm over a large area through the restraint sleeve, so that the restraint sleeve can be connected to the arm more stably, and the arm is also less oppressed because the contact area between the restraint sleeve and the arm is relatively large, the existing device does not solve the problem that when a patient with a disabled arm installs the prosthetic hand alone, it is inconvenient for the patient to install the prosthetic hand with the inner and outer receiving cavities due to the patient's one-handed operation. When the patient wears the inner and outer receiving cavities, the ventilation holes are easily blocked by impurities such as dust and the inner and outer receiving cavities are too sweaty, causing the inner and outer receiving cavities and the upper artificial leather to be soaked in sweat for a long time, thereby reducing the service life or polluting their color. Therefore, we propose a new device to solve the above problems. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a 3D printed forearm prosthesis, which solves the problems that the forearm prosthesis is inconvenient for patients to wear with one hand and that excessive sweat, dust and impurities inside the forearm prosthesis affect the breathability.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a 3D printed forearm prosthesis, comprising an inner and outer receiving cavity, the surfaces of the inner and outer receiving cavities are sleeved with upper artificial skin, the surfaces of the inner and outer receiving cavities are provided with ventilation holes, the front faces of the inner and outer receiving cavities are plugged with cover plates, the inner and outer receiving cavities are fixedly connected to a spring telescopic rod, one end of the spring telescopic rod is plugged with a baffle, the inner and outer receiving cavities are fixedly connected to a limit rod, the surface of the limit rod is slidably connected to a left clamp, the surface of the limit rod is slidably connected to a right clamp, the internal thread of the right clamp is penetrated by a forward and reverse threaded screw, the interior of the right clamp is provided with a bolt, the surface thread of the bolt is penetrated by a prosthetic hand, the inner and outer receiving cavities are fixedly connected to a fixed seat, the upper interior of the fixed seat is rotatably connected to a fixed screw, the upper surface of the fixed screw is fixedly connected to a bevel gear, the surface of the bevel gear is meshed with a convex gear, the inner surface of the fixed seat is fixedly connected to a positioning rod, the surface of the positioning rod is slidably connected to a movable seat, and the surface of the movable seat is fixedly connected to a cleaning structure.

[0008] Optionally, a maintenance hole is opened on the front of the inner and outer receiving cavities, and the size of the maintenance hole is adapted to the cover plate.

[0009] Optionally, there are a plurality of ventilation holes, and the plurality of ventilation holes are unevenly distributed on the surfaces of the inner and outer receiving cavities.

[0010] Optionally, a docking hole is opened near the lower part of the back side of the inner and outer receiving cavities, and the inner and outer receiving cavities are rotatably connected to the forward and reverse threaded screws through the docking hole.

[0011] Optionally, the surface of the forward and reverse threaded screw close to the left side is a forward thread shape, and the forward and reverse thread shape is adapted to the left clamp, and the surface of the forward and reverse threaded screw close to the right side is a reverse thread shape, and the reverse thread shape is adapted to the right clamp.

[0012] Optionally, a hole is provided on the back side of the inner and outer receiving cavities near the upper portion, and the inner and outer receiving cavities are rotationally connected to the convex gear through the hole.

[0013] Optionally, a threaded hole is provided on the upper surface of the movable seat, and the movable seat is adapted to the fixed screw through the threaded hole.

[0014] Optionally, the cleaning structure is made of sponge material, and a surface of the cleaning structure is provided with a plurality of burrs.

[0015] Optionally, a supply seat is fixedly connected to the back of the inner and outer receiving cavities, an adjusting bolt is passed through the internal thread of the supply seat, a restraining belt is fixedly connected to the surface of the adjusting bolt, and a collecting seat is fixedly connected to the back of the inner and outer receiving cavities, a docking groove is provided on the front of the collecting seat, and the collecting seat is fixedly connected to one end of the restraining belt through the collecting groove.

[0016] Optionally, the interior of the inner and outer receiving cavities is fixedly connected with an upper elastic band, one end of the upper elastic band is fixedly connected with a buckle seat, the interior of the inner and outer receiving cavities is fixedly connected with a lower elastic band, one end of the lower elastic band is fixedly connected with a docking buckle, the buckle seat and the docking buckle are adapted to each other, the interior of the inner and outer receiving cavities is fixedly connected with a heat conducting seat, the lower surface of the heat conducting seat is plugged with a heat conducting pipe, and one end of the heat conducting pipe is plugged with a heat sink.

[0017] In summary, the technical effects and advantages of the utility model are:

[0018] 1. The utility model has a reasonable structure. A digital model of the patient's forearm stump is obtained through CT scanning. The healthy forearm is scanned with a handheld scanner, and the shape of the stump is obtained by mirroring. It is digitally and accurately manufactured to improve the comfort of the prosthetic receiving cavity and the appearance of the prosthesis. The inner and outer receiving cavities are integrated to reduce the overall weight of the prosthesis and reduce the risk of damage. The ventilation holes can be used for ventilation when the patient wears it, which is convenient for perspiration and increases the patient's wearing comfort. The cover plate is separated from the inner and outer receiving cavities, and the maintenance hole is used to facilitate the maintenance and adjustment of the prosthesis. After the inner and outer receiving cavities are fixed to the position of the patient's stump, the prosthetic hand and the bolts are connected, and then the prosthetic hand is inserted into the inner and outer receiving cavities. The bolts of the prosthetic hand are moved toward the inner and outer receiving cavities so that the bolts push the baffle open and the bolts are on. After the end protrusion is separated from the baffle, the push plate is brought into contact with the lower end thread of the bolt through the spring telescopic rod, so that the bolt cannot be lowered, thereby initially positioning and fixing the prosthetic hand. Then, by rotating the forward and reverse threaded screw, the left clamp is moved to the right, and the right clamp is moved to the left at the same time, so that the left clamp and the right clamp clamp the bolt and fix it, and at the same time, the prosthetic hand is fixed to the inner and outer receiving cavities. This solves the problem that when patients with arm disability install the prosthetic hand alone, it is inconvenient for the patient to install the prosthetic hand with the inner and outer receiving cavities due to one-handed operation. The effect of first inserting the prosthetic hand into the inner and outer receiving cavities to initially fix it and then fixing the prosthetic hand by rotating the forward and reverse threaded screw is achieved, which greatly reduces the situation where the prosthetic hand cannot be installed due to one-handed operation.

[0019] 2. In the utility model, the bevel gear is rotated to drive the fixed screw to rotate by rotating the convex gear, and the fixed screw is rotated to move the movable seat and the cleaning structure downward. The cleaning structure can clean the ventilation hole and absorb the sweat inside the inner and outer receiving cavities at the same time, solving the problem that the ventilation holes are easily blocked by dust and other impurities when the patients wear the inner and outer receiving cavities and the inner and outer receiving cavities and the upper artificial leather are soaked in sweat for a long time, thereby reducing the service life or polluting their color. The cleaning structure can be moved up and down to absorb the sweat inside the inner and outer receiving cavities and clear the blockage of the ventilation holes, thereby greatly enhancing the service life of the inner and outer receiving cavities and the upper artificial leather.

[0020] 3. In the present invention, the restraint is loosened by loosening the adjusting bolt, and then the restraint is passed through the docking buckle and the buckle seat, and the docking buckle is inserted into the buckle seat to limit the restraint. The external receiving cavity is brought into contact with the patient's forearm residual limb, and then the restraint is tightened by rotating the adjusting bolt until the patient's forearm residual limb is tightened to fix the external receiving cavity to the patient's forearm residual limb, and then the adjusting bolt is tightened to fix the adjusting bolt. When the external receiving cavity is used in winter, the restraint is loosened by loosening the adjusting bolt, and then the restraint is put on the patient's shoulder, and the restraint is tightened by rotating the adjusting bolt, and then the adjusting bolt is tightened to fix the adjusting bolt. This solves the problem that the external receiving cavity is easily detached due to shaking when the patient wears the forearm prosthesis in daily life, and that the restraint is easily fixed to the shoulder by the restraint in summer because most clothes are short-sleeved. The problem of affecting the wearing aesthetics is solved by wearing the restraint on the patient's shoulder in winter to reduce the weight of the patient's forearm residual limb, and fixing the restraint by docking buckles and buckle seats in summer to tighten and fix the restraint to the patient's forearm residual limb, which greatly reduces the situation of forearm prosthesis falling off. By making the patient's forearm residual limb contact with the heat conducting seat, the heat inside the heat conducting seat is discharged into the heat dissipation phosphor through the heat conducting pipe, and then the heat is discharged through the air vents through the heat dissipation phosphor, which solves the problem that when wearing a forearm prosthesis in summer, the temperature of the patient's forearm residual limb is too high due to the high external temperature, which affects the patient's wearing experience. The effect of conducting heat between the patient's forearm residual limb and the wearing position of the forearm prosthesis is achieved, which greatly enhances the patient's experience when wearing the forearm prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is an exploded schematic diagram of the internal and external receiving cavity structure of the utility model;

[0023] Figure 3 This is an exploded schematic diagram of the prosthetic hand structure of the utility model;

[0024] Figure 4This is an exploded schematic diagram of the movable seat structure of the utility model;

[0025] Figure 5 This is an exploded schematic diagram of the mobile seat structure of the utility model.

[0026] In the figure: 1. Internal and external receiving cavity; 2. Upper artificial leather; 3. Ventilation hole; 4. Cover plate; 5. Spring telescopic rod; 6. Baffle; 7. Limit rod; 8. Left clamp; 9. Right clamp; 10. Positive and negative thread screw; 11. Bolt; 12. Prosthetic hand; 13. Fixed seat; 14. Fixed screw; 15. Bevel gear; 16. Convex gear; 17. Positioning rod; 18. Moving seat; 19. Cleaning structure; 20. Supply seat; 21. Adjusting bolt; 22. Restraint belt; 23. Collecting seat; 24. Upper elastic belt; 25. Buckle seat; 26. Lower elastic belt; 27. Docking buckle; 28. Thermal seat; 29. ​​Thermal pipe; 30. Heat sink. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example: Reference Figures 1-4 The 3D printed forearm prosthesis shown in the figure includes an inner and outer receiving cavity 1, the surface of the inner and outer receiving cavity 1 is covered with an upper artificial skin 2, the surface of the inner and outer receiving cavity 1 is provided with a ventilation hole 3, the front of the inner and outer receiving cavity 1 is plugged with a cover plate 4, the inner and outer receiving cavity 1 is fixedly connected to a spring telescopic rod 5, one end of the spring telescopic rod 5 is plugged with a baffle 6, the inner and outer receiving cavity 1 is fixedly connected to a limit rod 7, the surface of the limit rod 7 is slidably connected to a left clamp 8, the surface of the limit rod 7 is slidably connected to a right clamp 9, and the internal thread of the right clamp 9 is penetrated by positive and negative threads. A threaded screw 10 and a bolt 11 are provided inside the right clamp 9, and a prosthetic hand 12 is threaded through the surface of the bolt 11. The inside of the inner and outer receiving cavities 1 is fixedly connected to a fixed seat 13, and the upper inner part of the fixed seat 13 is rotatably connected to a fixed screw 14. The upper surface of the fixed screw 14 is fixedly connected to a bevel gear 15, and the surface of the bevel gear 15 is meshed with a convex gear 16. The inside of the fixed seat 13 is fixedly connected to a positioning rod 17, and the surface of the positioning rod 17 is slidably connected to a moving seat 18, and the surface of the moving seat 18 is fixedly connected to a cleaning structure 19.

[0029] As a preferred implementation in this embodiment, Figure 1-Figure 3As shown, the inner and outer receiving cavities 1, the surfaces of the inner and outer receiving cavities 1 are sleeved with an upper simulated leather 2, the surfaces of the inner and outer receiving cavities 1 are provided with air holes 3, the number of the air holes 3 is several, and the air holes 3 are unevenly distributed on the surfaces of the inner and outer receiving cavities 1, the front of the inner and outer receiving cavities 1 is plugged with a cover plate 4, the front of the inner and outer receiving cavities 1 is provided with a maintenance hole, the size of the maintenance hole is adapted to the cover plate 4, the interior of the inner and outer receiving cavities 1 is fixedly connected with a spring telescopic rod 5, one end of the spring telescopic rod 5 is plugged with a baffle 6, the interior of the inner and outer receiving cavities 1 is fixedly connected with a limit rod 7, the surface of the limit rod 7 is slidably connected with a left clamp 8, the surface of the limit rod 7 is slidably connected with a right clamp 9, and the internal thread of the right clamp 9 is penetrated by a forward and reverse thread screw 10. A docking hole is provided near the lower part of the back of the inner and outer receiving cavities 1. The inner and outer receiving cavities 1 are rotatably connected with the positive and negative threaded screws 10 through the docking hole. The surface of the positive and negative threaded screws 10 near the left side is a positive thread shape, and the positive thread shape is mutually adapted to the left clamp 8. The surface of the positive and negative threaded screws 10 near the right side is a negative thread shape, and the negative thread shape is mutually adapted to the right clamp 9. A bolt 11 is provided inside the right clamp 9, and the surface thread of the bolt 11 is penetrated by a prosthetic hand 12. During use, a digital model of the patient's forearm stump is obtained by CT scanning, and the healthy forearm is scanned with a handheld scanner. The shape of the stump side is obtained by mirroring, and digital precision is made to improve the comfort and appearance of the prosthetic receiving cavity. The inner and outer receiving cavities 1 is an integrated molding, which reduces the overall weight of the prosthesis and reduces the risk of damage. The ventilation holes 3 can be used for ventilation when the patient wears it, which is convenient for perspiration and increases the patient's wearing comfort. By separating the cover plate 4 from the inner and outer receiving cavities 1, the maintenance hole is used to facilitate the maintenance and adjustment of the prosthesis. After the inner and outer receiving cavities 1 are fixed to the position of the patient's residual limb, the prosthetic hand 12 and the bolt 11 are connected, and then the prosthetic hand 12 is inserted into the inner and outer receiving cavities 1. The bolts 11 of the prosthetic hand 12 are moved into the inner and outer receiving cavities 1 so that the bolt 11 pushes the baffle 6 open. After the upper end protrusion of the bolt 11 is separated from the baffle, the spring telescopic rod 5 is used to make the push plate 6 contact with the lower end thread of the bolt 11 so that the bolt 11 cannot fall, thereby 12 is initially positioned and fixed, and then the left clamp 8 is moved to the right by rotating the forward and reverse threaded screw 10, and the right clamp 9 is moved to the left at the same time, so that the left clamp 8 and the right clamp 9 clamp the bolt 11 and fix it, and at the same time the prosthetic hand 12 is fixedly connected to the inner and outer receiving cavities 1, which solves the problem that when a patient with a disabled arm installs the prosthetic hand 12 alone, it is inconvenient for the patient to install the prosthetic hand 12 with the inner and outer receiving cavities 1 due to one-handed operation. When the patient installs the prosthetic hand 12, the prosthetic hand 12 is first inserted into the inner and outer receiving cavities 1 to be initially fixed, and then the prosthetic hand 12 is fixed by rotating the forward and reverse threaded screw 10, which greatly reduces the situation where the prosthetic hand 12 cannot be installed due to one-handed operation.

[0030] like Figure 4As shown, in this embodiment, the interior of the inner and outer receiving cavities 1 is fixedly connected with a fixed seat 13, and the upper interior of the fixed seat 13 is rotatably connected with a fixed screw 14. The upper surface of the fixed screw 14 is fixedly connected with a bevel gear 15, and the surface of the bevel gear 15 is meshed with a convex gear 16. A hole is provided near the upper part of the back of the inner and outer receiving cavities 1, and the inner and outer receiving cavities 1 are rotatably connected with the convex gear 16 through the hole. The interior of the fixed seat 13 is fixedly connected with a positioning rod 17, and the surface of the positioning rod 17 is slidably connected with a movable seat 18. A threaded hole is provided on the upper surface of the movable seat 18, and the movable seat 18 is adapted to the fixed screw 14 through the threaded hole. The surface of the movable seat 18 is fixedly connected with a cleaning structure 19, and the cleaning structure 19 is made of sponge material. The surface of the cleaning structure 19 is provided with a number of burrs. In the process, the bevel gear 15 is rotated by rotating the convex gear 16 to drive the fixed screw 14 to rotate. By rotating the fixed screw 14, the movable seat 18 and the cleaning structure 19 are moved downward. The cleaning structure 19 can clean the ventilation hole 3 and absorb the sweat inside the inner and outer receiving cavities 1 at the same time, solving the problem that the ventilation hole 3 is easily blocked by dust and other impurities when the patient wears the inner and outer receiving cavities 1 and the inner and outer receiving cavities 1 have too much sweat, causing the inner and outer receiving cavities 1 and the upper artificial leather 2 to be soaked in sweat for a long time, thereby reducing the service life or polluting their color. The cleaning structure 19 can be moved up and down to absorb the sweat inside the inner and outer receiving cavities 1 and clear the blockage of the ventilation hole 3, thereby greatly enhancing the service life of the inner and outer receiving cavities 1 and the upper artificial leather 2.

[0031] like Figure 5As shown, in this embodiment, the back of the inner and outer receiving cavities 1 is fixedly connected with a supply seat 20, the internal thread of the supply seat 20 is penetrated by an adjusting bolt 21, the surface of the adjusting bolt 21 is fixedly connected with a restraining belt 22, the back of the inner and outer receiving cavities 1 is fixedly connected with a collecting seat 23, the front of the collecting seat 23 is provided with a docking groove, the collecting seat 23 is fixedly connected to one end of the restraining belt 22 through the collecting groove, the interior of the inner and outer receiving cavities 1 is fixedly connected with an upper elastic belt 24, one end of the upper elastic belt 24 is fixedly connected with a buckle seat 25, the interior of the inner and outer receiving cavities 1 is fixedly connected with a lower elastic belt 26, one end of the lower elastic belt 26 is fixedly connected with a docking buckle 27, the buckle seat 25 and The docking buckles 27 are adapted to each other, and the interior of the inner and outer receiving cavities 1 is fixedly connected with a heat conducting seat 28, and a heat conducting pipe 29 is inserted into the lower surface of the heat conducting seat 28. One end of the heat conducting pipe 29 is inserted into a heat dissipation phosphorus 30. During use, when the outer receiving cavity 1 is used in summer, the restraint belt 22 is loosened by loosening the adjusting bolt 21, and then the restraint belt 22 is passed through the docking buckle 27 and the buckle seat 25. The restraint belt 22 is limited by inserting the docking buckle 27 into the buckle seat 25. The outer receiving cavity 1 is brought into contact with the patient's forearm stump and then the restraint belt 22 is tightened by rotating the adjusting bolt 21 until the patient's forearm stump is tightened so that the outer receiving cavity 1 is fixed to the patient's forearm stump. The adjusting bolt 21 is then tightened to fix the adjusting bolt 21. When the external receiving cavity 1 is used in winter, the adjusting bolt 21 is loosened to loosen the restraint 22. The restraint 22 is then put on the patient's shoulder. The restraint 22 is tightened by rotating the adjusting bolt 21. The adjusting bolt 21 is then tightened to fix the adjusting bolt 21. This solves the problem that the external receiving cavity 1 is easily detached due to shaking when the patient wears the forearm prosthesis daily, and the problem that the clothes are mostly short-sleeved in summer and are easily affected by the restraint 22 when fixed to the shoulder, achieves the goal of reducing the weight of the patient's forearm stump by wearing the restraint 22 on the patient's shoulder in winter and using it in summer through the docking buckle 27 and the buckle seat 25 fix the restraint belt 22, thereby tightening and fixing the restraint belt 22 to the patient's forearm stump, greatly reducing the situation of the forearm prosthesis falling off. By making the patient's forearm stump contact with the heat-conducting seat 28, the heat inside the heat-conducting seat 28 is discharged into the heat dissipation phosphor 30 through the heat-conducting pipe 29, and then the heat is discharged from the air vent 3 through the heat dissipation phosphor 30, which solves the problem that when wearing a forearm prosthesis in summer, the temperature of the patient's forearm stump is too high due to the high external temperature, which affects the patient's wearing experience. The effect of heat dissipation between the patient's forearm stump and the wearing position of the forearm prosthesis is achieved, which greatly enhances the patient's experience when wearing the forearm prosthesis.

[0032] Working principle of this utility model:

[0033] During use, a digital model of the patient's forearm stump is first obtained through CT scanning, and the healthy forearm is scanned with a handheld scanner, and the shape of the stump side is obtained by mirroring. It is digitally and accurately made to improve the comfort of the prosthetic receiving cavity and the appearance of the prosthesis. The inner and outer receiving cavities 1 are integrated to reduce the overall weight of the prosthesis and reduce the risk of damage. The air vents 3 can be used for ventilation when the patient wears it, which is convenient for perspiration and increases the patient's wearing comfort. By separating the cover plate 4 from the inner and outer receiving cavities 1, the maintenance hole is used to facilitate the maintenance and adjustment of the prosthesis. After the inner and outer receiving cavities 1 are fixed in the position of the patient's stump, the prosthetic hand 12 and the screw are screwed together. The bolt 11 is connected, and then the prosthetic hand 12 is inserted into the inner and outer receiving cavity 1. The prosthetic hand 12 moves into the inner and outer receiving cavity 1 through the bolts 11, so that the bolts 11 push the baffle 6 open. After the upper end convex block of the bolt 11 is separated from the baffle, the push plate 6 is made to contact the lower end thread of the bolt 11 through the spring telescopic rod 5, so that the bolt 11 cannot fall, thereby preliminarily positioning and fixing the prosthetic hand 12. Then, by rotating the forward and reverse threaded screw 10, the left clamp 8 moves to the right, and the right clamp 9 moves to the left at the same time, so that the left clamp 8 and the right clamp 9 clamp the bolt 11 and fix it, and at the same time, the prosthetic hand 12 is fixedly connected to the inner and outer receiving cavity 1. By rotating The convex gear 16 rotates the bevel gear 15 to drive the fixed screw 14 to rotate, and by rotating the fixed screw 14, the movable seat 18 and the cleaning structure 19 are moved downward, and the vent hole 3 can be cleaned by the cleaning structure 19 while the sweat inside the inner and outer receiving cavities 1 is adsorbed. When using the forearm prosthesis in summer, the restraint 22 is loosened by loosening the adjusting bolt 21, and then the restraint 22 is passed through the docking buckle 27 and the buckle seat 25, and the docking buckle 27 is inserted into the buckle seat 25 to limit the restraint 22. By contacting the outer receiving cavity 1 with the patient's forearm stump and then rotating the adjusting bolt 21, the restraint 22 is loosened. The restraint belt 22 is tightened until the patient's forearm stump is tightened to fix the external receiving cavity 1 on the patient's forearm stump, and then the adjusting bolt 21 is tightened to fix the adjusting bolt 21. When the external receiving cavity 1 is used in winter, the restraint belt 22 is loosened by loosening the adjusting bolt 21, and then the restraint belt 22 is put on the patient's shoulder, and the restraint belt 22 is tightened by rotating the adjusting bolt 21, and then the adjusting bolt 21 is tightened to fix the adjusting bolt 21. By contacting the patient's forearm stump with the thermal seat 28, the heat inside the thermal seat 28 is discharged into the heat dissipation phosphor 30 through the heat conduction pipe 29, and then the heat is discharged from the air vent 3 through the heat dissipation phosphor 30.

[0034] The electrical components mentioned in this article are all connected to an external main controller and 220V AC power, and the main controller can be a conventional known device that performs control such as a computer.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A 3D printed forearm prosthesis, comprising an inner and outer receiving cavity (1), characterized in that: The surfaces of the inner and outer receiving cavities (1) are sleeved with an upper simulated leather (2), the surfaces of the inner and outer receiving cavities (1) are provided with an air vent (3), the front of the inner and outer receiving cavities (1) is plugged with a cover plate (4), the interior of the inner and outer receiving cavities (1) is fixedly connected with a spring telescopic rod (5), one end of the spring telescopic rod (5) is plugged with a baffle (6), the interior of the inner and outer receiving cavities (1) is fixedly connected with a limit rod (7), the surface of the limit rod (7) is slidably connected with a left clamp (8), the surface of the limit rod (7) is slidably connected with a right clamp (9), the internal thread of the right clamp (9) is penetrated by a positive and negative thread screw (10), the right clamp A bolt (11) is provided inside (9), and a prosthetic hand (12) is threaded through the surface of the bolt (11), and a fixed seat (13) is fixedly connected to the inside of the inner and outer receiving cavities (1), and a fixed screw (14) is rotatably connected to the upper inside of the fixed seat (13), and a bevel gear (15) is fixedly connected to the upper surface of the fixed screw (14), and a convex gear (16) is meshed on the surface of the bevel gear (15), and a positioning rod (17) is fixedly connected to the inside of the fixed seat (13), and a movable seat (18) is slidably connected to the surface of the movable seat (18), and a cleaning structure (19) is fixedly connected to the surface of the movable seat (18).

2. A 3D printed forearm prosthesis according to claim 1, characterized in that: A maintenance hole is provided on the front of the inner and outer receiving cavities (1), and the size of the maintenance hole is adapted to the cover plate (4).

3. The 3D printed forearm prosthesis according to claim 1, characterized in that: The number of the air holes (3) is several, and the air holes (3) are unevenly distributed on the surfaces of the inner and outer receiving cavities (1).

4. The 3D printed forearm prosthesis according to claim 1, characterized in that: A docking hole is provided on the back side of the inner and outer receiving cavities (1) near the lower portion, and the inner and outer receiving cavities (1) are rotatably connected to the forward and reverse threaded lead screws (10) through the docking hole.

5. The 3D printed forearm prosthesis according to claim 1, characterized in that: The surface of the positive and negative threaded screw (10) close to the left side is in the shape of a positive thread, and the positive thread shape is mutually adapted to the left clamp (8); the surface of the positive and negative threaded screw (10) close to the right side is in the shape of a negative thread, and the negative thread shape is mutually adapted to the right clamp (9).

6. The 3D printed forearm prosthesis according to claim 1, characterized in that: A hole is provided on the back side of the inner and outer receiving cavities (1) near the upper portion, and the inner and outer receiving cavities (1) are rotationally connected to the convex gear (16) through the hole.

7. The 3D printed forearm prosthesis according to claim 1, characterized in that: A threaded hole is provided on the upper surface of the movable seat (18), and the movable seat (18) is adapted to the fixed screw (14) through the threaded hole.

8. The 3D printed forearm prosthesis according to claim 1, characterized in that: The cleaning structure (19) is made of sponge material, and a plurality of burrs are provided on the surface of the cleaning structure (19).

9. The 3D printed forearm prosthesis according to claim 1, characterized in that: The back of the inner and outer receiving cavities (1) is fixedly connected to a supply seat (20), the internal thread of the supply seat (20) is penetrated by an adjusting bolt (21), the surface of the adjusting bolt (21) is fixedly connected to a restraining belt (22), the back of the inner and outer receiving cavities (1) is fixedly connected to a collecting seat (23), the front of the collecting seat (23) is provided with a docking groove, and the collecting seat (23) is fixedly connected to one end of the restraining belt (22) through the collecting groove.

10. The 3D printed forearm prosthesis according to claim 1, characterized in that: The interior of the inner and outer receiving cavities (1) is fixedly connected with an upper elastic band (24), one end of the upper elastic band (24) is fixedly connected with a buckle seat (25), the interior of the inner and outer receiving cavities (1) is fixedly connected with a lower elastic band (26), one end of the lower elastic band (26) is fixedly connected with a docking buckle (27), the buckle seat (25) and the docking buckle (27) are adapted to each other, the interior of the inner and outer receiving cavities (1) is fixedly connected with a heat conducting seat (28), the lower surface of the heat conducting seat (28) is plugged with a heat conducting pipe (29), and one end of the heat conducting pipe (29) is plugged with a heat dissipation phosphor (30).

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