An articulating joint for a prosthetic limb

Abstract

The application discloses a joint detachable artificial limb, which comprises a thigh artificial limb, a lower leg artificial limb and a foot artificial limb, a waistband is arranged above the thigh artificial limb, fixed blocks and magic tape thorn surfaces are fixedly connected to the front and back sides of the thigh artificial limb, a through slot is formed in the fixed block, a connecting belt is movably arranged in the through slot, and the magic tape hair surfaces are fixedly connected to the side of the connecting belt close to the thigh artificial limb.

Description

Technical Field

[0001] This invention relates to the field of prosthetics, and more particularly to a prosthesis with detachable and assembleable joints. Background Technology

[0002] Prostheses are artificial prostheses specially designed, manufactured, and assembled using engineering techniques to compensate for amputees or those with incomplete limb loss. Also known as "artificial limbs," their main function is to replace some of the functions of the lost limb, enabling amputees to regain a certain degree of self-care and work ability. Leg prostheses include lower leg prostheses and thigh prostheses, with thigh prostheses generally consisting of a thigh prosthesis and a lower leg prosthesis that rotate together.

[0003] In existing technologies, the upper and lower knee joint components of a thigh prosthesis are typically fixed together using a linkage and bolts. However, during long-term use, the knee joint requires frequent flexion and extension movements, and this repeated rotation inevitably leads to mechanical wear on the connecting components, affecting the flexibility and comfort of joint movement. To maintain the normal performance of the prosthesis, regular maintenance or replacement of worn components is necessary, which requires the ability to separate the thigh and lower leg components. However, the aforementioned connection method using multiple bolts requires loosening and removing numerous bolts one by one during disassembly and assembly, making the process extremely cumbersome and time-consuming, and causing inconvenience for the daily maintenance of the prosthesis. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, one of the objectives of the present invention is to provide a prosthesis with a joint that can be assembled and disassembled.

[0005] One of the objectives of this invention is achieved through the following technical solution:

[0006] A detachable and assembleable prosthesis includes a thigh prosthesis, a lower leg prosthesis, and a foot prosthesis. A belt is located at the top of the thigh prosthesis. Fixing blocks and Velcro-like surfaces are fixedly connected to both the front and rear sides of the thigh prosthesis. A groove is formed on the fixing block, and a connecting strap is movably inserted through the inner cavity of the groove. A Velcro-like surface is fixedly connected to the side of the connecting strap closest to the thigh prosthesis. A first connecting rod is fixedly connected to the bottom of the thigh prosthesis, and several first perforations are formed on the first connecting rod. Two second perforations are formed on the outer wall of the lower leg prosthesis. A connecting shaft movably inserts through the inner cavity of one of the first perforations. Both ends of the connecting shaft movably insert through adjacent second perforations. A threaded tube is fitted onto the outer side of the first connecting rod, and a bearing is fixedly fitted to the bottom outer end of the threaded tube. Positioning rods are fixedly connected to both sides of the bearing. Two limiting holes are formed on the connecting shaft.

[0007] Furthermore, a buckle is fixedly connected to one end of the belt, and several fixing holes are provided on the belt, with the fixing holes matching the buckle.

[0008] Furthermore, the fixing block is located above the hook and loop serrated surface, and the hook and loop serrated surface and the hook and loop loop serrated surface are attached to each other.

[0009] Furthermore, a connecting ring is fixedly connected to the top of the connecting belt, and the connecting ring is movably sleeved on the outside of the belt.

[0010] Furthermore, a screw hole is provided on the side of the fixing block away from the thigh prosthesis, and a threaded post is provided through the inner cavity of the screw hole. Several anti-slip protrusions are fixedly connected to one end of the threaded post, and a knob is fixedly connected to the other end of the threaded post.

[0011] Furthermore, several of the anti-slip protrusions are arranged in a circular array, and the anti-slip protrusions are in contact with the adjacent connecting strips.

[0012] Furthermore, the threaded tube is threadedly connected to the first connecting rod, and the outer wall of the first connecting rod is provided with an external thread that matches the threaded tube.

[0013] Furthermore, the two limiting holes are arranged symmetrically about the central axis of the connecting shaft. The positioning rod moves through the adjacent limiting holes. The cross-section of the positioning rod is L-shaped. The horizontal distance between the bottom ends of the two positioning rods is slightly smaller than the inner top diameter of the lower leg prosthesis.

[0014] Furthermore, two operating rods are fixedly connected to the outer wall of the threaded tube near the top, and the vertical distance between the top of the threaded tube and the bottom of the thigh prosthesis is greater than the length of the vertical part of the positioning rod.

[0015] Furthermore, the outer wall of the thigh prosthesis has several ventilation holes, the inner side of the thigh prosthesis is fixedly connected to a buffer sleeve, the top of the foot prosthesis has a blind hole, the inner cavity of the blind hole is threaded with a second connecting rod, and the second connecting rod is fixedly connected to the bottom of the lower leg prosthesis.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present invention provides a prosthesis with detachable joints. The first connecting rod at the bottom of the thigh prosthesis has several first perforations, and the outer side wall of the lower leg prosthesis has two second perforations. During assembly, the first and second perforations of the corresponding height are aligned according to the user's leg length, and the connecting shaft is inserted to complete the initial connection. During disassembly, the connecting shaft is simply pulled out to separate the prosthesis. This plug-in structure replaces the traditional method of fixing with multiple sets of bolts, making the joint assembly and disassembly operations extremely simple and quick, and greatly reducing the difficulty of daily maintenance of the prosthesis.

[0018] 2. The present invention provides a prosthesis with detachable joints. Several ventilation holes are opened on the outer wall of the thigh prosthesis, and a buffer sleeve is fixedly connected to the inner side. The ventilation holes promote air circulation and reduce the accumulation of sweat in the wearing area. The buffer sleeve is made of flexible material, which forms an elastic buffer for the amputated limb stump, avoiding friction discomfort caused by the hard shell of the prosthesis directly contacting the skin. This significantly improves the wearing experience of the prosthesis and is beneficial for amputees to wear and use it for a long time.

[0019] 3. The present invention provides a prosthesis with detachable joints. When the connecting shaft is inserted, the rotating operating rod drives the threaded tube to move downward, causing the positioning rod to pass through the limiting hole and lock the connecting shaft in a predetermined position. This locking structure effectively prevents the connecting shaft from accidentally coming off during the flexion and extension movements of the prosthesis, while avoiding the problem of loosening of traditional bolts after long-term use.

[0020] 4. The present invention provides a prosthesis with detachable joints. The positioning rod has an L-shaped cross-section. Its vertical part passes through the limiting hole to axially limit the connecting shaft, and its horizontal part abuts against the inner wall of the lower leg prosthesis to form auxiliary support for the threaded tube. This double limiting structure makes the connecting shaft more stable when subjected to the shear force generated by the movement of the prosthesis, and extends the service life of the joint connection part.

[0021] 5. This invention provides a prosthesis with detachable joints, wherein a plurality of first perforations are equidistantly arranged along the axial direction on the first connecting rod. Depending on the user's residual limb length and gait requirements, different heights of the first and second perforations can be selected to adjust the relative height of the thigh and lower leg prostheses. This adjustable design allows the same prosthesis to adapt to users of different heights or amputation positions, improving the product's versatility.

[0022] 6. The present invention provides a prosthesis with detachable joints. The waist belt is fixed to the user's waist by a fixing buckle and fixing hole. The connecting ring at the top of the connecting belt is movably sleeved on the outside of the waist belt. After the connecting belt passes through the groove on the fixing block, it is fixed by the Velcro loop surface and the Velcro spike surface. This suspension structure distributes the weight of the prosthesis to support the waist, reduces the vertical pressure on the stump of the amputated limb, and improves wearing comfort and walking stability.

[0023] 7. The present invention provides a prosthesis with detachable joints. The fixing block has a screw hole on its side wall, and a threaded post is threaded into the screw hole. The end of the post is provided with an annular array of anti-slip protrusions. After the connecting strap is initially fixed by Velcro, rotating the knob moves the threaded post inward, and the anti-slip protrusions press against the surface of the connecting strap to form a secondary lock. This effectively prevents the Velcro from loosening due to wear or stress during long-term use, and ensures the reliability of the prosthesis suspension system. Attached Figure Description

[0024] Figure 1This is a frontal perspective view of a prosthesis with detachable joints according to the present invention;

[0025] Figure 2 This is a front perspective view of a connecting ring for a prosthetic limb component that can be assembled and disassembled according to the present invention;

[0026] Figure 3 This is a front perspective view of a connecting strap for a prosthetic component with a detachable joint, according to the present invention.

[0027] Figure 4 This is a frontal perspective view of a Velcro-like spiked ring, a prosthetic component with a detachable joint, according to the present invention.

[0028] Figure 5 This is a front perspective view of a fixation block for a prosthetic limb component with a detachable joint, according to the present invention.

[0029] Figure 6 This is a front perspective view of a slotted prosthetic component with a detachable joint according to the present invention.

[0030] Figure 7 This is a front perspective view of a threaded post of a prosthetic component with a detachable joint according to the present invention.

[0031] Figure 8 This is a rear perspective view of a threaded post of a prosthetic component with a detachable joint according to the present invention.

[0032] Figure 9 This is a frontal perspective view of a thigh prosthesis, a prosthesis component with detachable joints according to the present invention.

[0033] Figure 10 This is a front perspective view of the first connecting rod of a prosthetic limb component with a detachable joint according to the present invention;

[0034] Figure 11 This is a front perspective view of a connecting shaft for a prosthetic component with a detachable joint, according to the present invention.

[0035] Figure 12 This is a front perspective view of a threaded tube for a prosthetic component with a detachable joint, according to the present invention.

[0036] Figure 13 This is a frontal perspective view of a lower leg prosthesis, a prosthesis component with detachable joints according to the present invention.

[0037] Figure 14 This is a frontal perspective view of the second perforation of a prosthetic component with a detachable joint according to the present invention.

[0038] Figure 15 This is a front perspective view of the ventilation port of a prosthetic component with a detachable joint according to the present invention;

[0039] Figure 16 This is a frontal perspective view of a blind hole in a prosthetic component with a detachable joint according to the present invention.

[0040] The following are the labels in the diagram: 1. Waist belt; 2. Fastening buckle; 3. Fixing hole; 4. Thigh prosthesis; 5. Connecting strap; 6. Connecting ring; 7. Velcro loop surface; 8. Velcro barbed surface; 9. Fixing block; 10. Through groove; 11. Screw hole; 12. Threaded post; 13. Knob; 14. Anti-slip protrusion; 15. First connecting rod; 16. First through hole; 17. Lower leg prosthesis; 18. Foot prosthesis; 19. Second through hole; 20. Connecting shaft; 21. Limiting hole; 22. Threaded tube; 23. Operating rod; 24. Bearing; 25. Positioning rod; 26. Second connecting rod; 27. Vent; 28. Buffer sleeve; 29. ​​Blind hole. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 A prosthesis with detachable joints includes a thigh prosthesis 4, a lower leg prosthesis 17, and a foot prosthesis 18. A waist belt 1 is located directly above the thigh prosthesis 4. A fixing buckle 2 is fixedly connected to one end of the waist belt 1. Several fixing holes 3 are opened on the waist belt 1, and the fixing holes 3 and the fixing buckle 2 are matched with each other. Fixing blocks 9 and hook and loop fasteners 8 are fixedly connected to both the front and rear sides of the thigh prosthesis 4. The fixing blocks 9 are located above the hook and loop fasteners 8. A through groove 10 is opened on the fixing blocks 9. A connecting strap 5 is movably inserted through the cavity of the through groove 10. A hook and loop fastener 7 is fixedly connected to the side of the connecting strap 5 near the thigh prosthesis 4. The hook and loop fasteners 8 and the hook and loop fasteners 7 are attached to each other. A connecting ring 6 is fixedly connected to the top of the connecting strap 5. The connecting ring 6 is movably sleeved on the outside of the waist belt 1.

[0044] A screw hole 11 is provided on the side of the fixing block 9 away from the thigh prosthesis 4. A threaded post 12 is provided through the inner cavity of the screw hole 11. Several anti-slip protrusions 14 are fixedly connected to one end of the threaded post 12, and a knob 13 is fixedly connected to the other end of the threaded post 12. Several anti-slip protrusions 14 are arranged in a ring array. The anti-slip protrusions 14 fit together with the adjacent connecting strip 5. A blind hole 29 is provided at the top of the foot prosthesis 18. A second connecting rod 26 is threadedly connected to the inner cavity of the blind hole 29. The second connecting rod 26 is fixedly connected to the bottom of the lower leg prosthesis 17.

[0045] In the above embodiment, when the prosthesis is worn, the user's thigh is first inserted into the thigh prosthesis 4, then the connecting strap 5 is passed through the slot 10, and the height of the connecting ring 6 at the top of the connecting strap 5 is adjusted to the user's waist. Then, the Velcro nap 7 and the Velcro barbed surface 8 on the connecting strap 5 are attached to each other to fix the connecting strap 5. To further fix the connecting strap 5, the knob 13 is rotated. The knob 13 drives the threaded post 12 to rotate in the inner cavity of the threaded hole 11. The threaded post 12 moves towards the connecting strap 5 under the action of the thread. The threaded post 12 presses and fixes the connecting strap 5 through the anti-slip protrusion 14. Then, the waist belt 1 is passed through the two connecting rings 6, and then the waist belt 1 is fixed to the user's waist through the fixing buckle 2 and fixing hole 3. At this time, the waist belt 1, connecting rings 6 and connecting strap 5 cooperate with each other to hang the prosthesis, so that the prosthesis can be more stably installed at the amputation site of the patient and improve stability.

[0046] Example 2

[0047] Please see Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 The bottom of the thigh prosthesis 4 is fixedly connected to a first connecting rod 15, which has several first perforations 16. The outer wall of the lower leg prosthesis 17 has two second perforations 19. A connecting shaft 20 is movably inserted through the inner cavity of one of the first perforations 16. The two ends of the connecting shaft 20 movably pass through the adjacent second perforations 19. A threaded tube 22 is sleeved on the outer side of the first connecting rod 15. The threaded tube 22 is threadedly connected to the first connecting rod 15. The outer wall of the first connecting rod 15 has an external thread that matches the threaded tube 22.

[0048] A bearing 24 is fixedly sleeved on the outer bottom end of the threaded tube 22. Positioning rods 25 are fixedly connected to both sides of the bearing 24. Two limiting holes 21 are opened on the connecting shaft 20. The two limiting holes 21 are symmetrically arranged with the central axis of the connecting shaft 20 as the axis of symmetry. The positioning rods 25 can move through the adjacent limiting holes 21. The cross-section of the positioning rods 25 is L-shaped. The horizontal distance between the bottom ends of the two positioning rods 25 is slightly smaller than the inner top diameter of the lower leg prosthesis 17. Two operating rods 23 are fixedly connected to the outer wall of the threaded tube 22 near the top. The vertical distance between the top of the threaded tube 22 and the bottom of the thigh prosthesis 4 is greater than the vertical length of the positioning rods 25.

[0049] In the above embodiment, during the assembly of the thigh prosthesis 4 and the lower leg prosthesis 17, the thigh prosthesis 4 is moved first, causing the first connecting rod 15 to be inserted into the top of the inner cavity of the lower leg prosthesis 17. Simultaneously, the first perforation 16 and the second perforation 19 are aligned according to the user's leg length. Then, the connecting shaft 20 is moved, passing through the first perforation 16 and the second perforation 19. Afterwards, the threaded tube 22 is rotated via the operating rod 23, causing the bearing 24 to move downwards under the action of the threads. The bearing 24 moves downward to support the positioning rod 25, aligning the positioning rod 25 with the adjacent limiting hole 21, until the threaded tube 22 drives the positioning rod 25 downward to pass through the adjacent limiting hole 21, thereby fixing the connecting shaft 20. This completes the assembly of the thigh prosthesis 4 and the lower leg prosthesis 17. When connecting the lower leg prosthesis 17 and the foot prosthesis 18, simply align the blind hole 29 with the second connecting rod 26 at the bottom of the lower leg prosthesis 17, and then tighten the foot prosthesis 18 to the bottom of the second connecting rod 26 through the thread.

[0050] Example 3

[0051] Please see Figure 15 and Figure 16 The outer wall of the thigh prosthesis 4 has several ventilation holes 27, and the inner side of the thigh prosthesis 4 is fixedly connected with a buffer sleeve 28.

[0052] In the above embodiment, during use, the ventilation port 27 promotes air circulation and reduces sweat accumulation in the wearing area; the cushioning sleeve 28 is made of flexible material, which forms an elastic cushion for the amputated limb stump, avoiding friction discomfort caused by the hard shell of the prosthesis directly contacting the skin, significantly improving the wearing experience of the prosthesis, and is beneficial for amputees to wear and use for a long time.

[0053] Working principle: This invention relates to a prosthesis with detachable joints. During use, when assembling the thigh prosthesis 4 and the lower leg prosthesis 17, the thigh prosthesis 4 is moved first, causing the first connecting rod 15 to be inserted into the top of the inner cavity of the lower leg prosthesis 17. Simultaneously, the first perforation 16 and the second perforation 19 are aligned according to the user's leg length. Then, the connecting shaft 20 is moved, passing through the first perforation 16 and the second perforation 19. Afterwards, the threaded tube 22 is rotated via the operating rod 23, causing the threaded tube 22 to drive the shaft under the action of the threads. The bearing 24 moves downwards, supporting the positioning rod 25 so that the positioning rod 25 is aligned with the adjacent limiting hole 21, until the threaded tube 22 drives the positioning rod 25 downwards to pass through the adjacent limiting hole 21, thereby fixing the connecting shaft 20. This completes the assembly of the thigh prosthesis 4 and the lower leg prosthesis 17. When connecting the lower leg prosthesis 17 and the foot prosthesis 18, simply align the blind hole 29 with the second connecting rod 26 at the bottom of the lower leg prosthesis 17, and then tighten the foot prosthesis 18 to the bottom of the second connecting rod 26 through the thread.

[0054] When wearing the prosthesis, first insert the user's thigh into the thigh prosthesis 4, then pass the connecting strap 5 through the slot 10, and adjust the height of the connecting ring 6 at the top of the connecting strap 5 to the user's waist. Then, attach the Velcro nap 7 and the Velcro barbed surface 8 of the connecting strap 5 together to fix the connecting strap 5. To further fix the connecting strap 5, rotate the knob 13. The knob 13 drives the threaded post 12 to rotate in the inner cavity of the threaded hole 11. The threaded post 12 moves towards the connecting strap 5 under the action of the thread. The threaded post 12 presses and fixes the connecting strap 5 through the anti-slip protrusion 14. Then, the waist belt 1 passes through the two connecting rings 6, and then the waist belt 1 is fixed to the user's waist through the fixing buckle 2 and fixing hole 3. At this time, the waist belt 1, connecting rings 6 and connecting strap 5 work together to hang the prosthesis, which can make the prosthesis more stably installed at the amputation site of the patient and improve stability.

[0055] In addition, several ventilation holes 27 are opened on the outer side wall of the thigh prosthesis 4, and a cushioning sleeve 28 is fixedly connected to the inner side. The ventilation holes 27 promote air circulation and reduce the accumulation of sweat in the wearing area. The cushioning sleeve 28 is made of flexible material, which forms an elastic cushion for the amputated limb stump, avoiding friction discomfort caused by the hard shell of the prosthesis directly contacting the skin. This significantly improves the wearing experience of the prosthesis and is beneficial for amputees to wear and use it for a long time.

[0056] Several first perforations 16 are made on the first connecting rod 15 at the bottom of the thigh prosthesis 4, and two second perforations 19 are made on the outer side wall of the lower leg prosthesis 17. During assembly, the first perforation 16 and the second perforation 19 of the corresponding height are selected according to the user's leg length, and the connecting shaft 20 is inserted to complete the initial connection. During disassembly, the connecting shaft 20 is simply pulled out to separate. This plug-in structure replaces the traditional multi-bolt fixing method, making the joint disassembly and assembly operation extremely simple and quick, and greatly reducing the difficulty of daily maintenance of the prosthesis.

[0057] When the connecting shaft 20 is inserted, the rotating operating lever 23 drives the threaded tube 22 to move downward, causing the positioning rod 25 to pass through the limiting hole 21 and lock the connecting shaft 20 in the predetermined position. This locking structure effectively prevents the connecting shaft 20 from accidentally coming out during the flexion and extension movements of the prosthesis, while also avoiding the problem of loosening after long-term use of traditional bolts.

[0058] The positioning rod 25 has an L-shaped cross-section. Its vertical part passes through the limiting hole 21 to axially limit the connecting shaft 20, and its horizontal part abuts against the inner wall of the lower leg prosthesis 17 to provide auxiliary support for the threaded tube 22. This double limiting structure makes the connecting shaft 20 more stable when subjected to the shear force generated by the movement of the prosthesis, and extends the service life of the joint connection part.

[0059] Several first perforations 16 are equidistantly arranged along the axial direction on the first connecting rod 15. Depending on the user's residual limb length and gait requirements, the first perforations 16 and second perforations 19 of different heights can be selected to match, adjusting the relative height of the thigh prosthesis 4 and the lower leg prosthesis 17. This adjustable design allows the same prosthesis to adapt to users of different heights or different amputation positions, improving the product's versatility.

[0060] The waist belt 1 is fixed to the user's waist by the fixing buckle 2 and fixing hole 3. The connecting ring 6 at the top of the connecting strap 5 is movably sleeved on the outside of the waist belt 1. After the connecting strap 5 passes through the groove 10 on the fixing block 9, it is fixed by the Velcro nap 7 and the Velcro spike 8. This suspension structure distributes the weight of the prosthesis to support the waist, reduces the vertical pressure on the stump of the amputated limb, and improves wearing comfort and walking stability.

[0061] The fixing block 9 has a screw hole 11 on its side wall. The threaded post 12 is threaded into the screw hole 11. Its end is provided with an annular array of anti-slip protrusions 14. After the connecting band 5 is initially fixed by the Velcro, the knob 13 is rotated to move the threaded post 12 inward. The anti-slip protrusions 14 press against the surface of the connecting band 5 to form a secondary lock, which effectively prevents the Velcro from loosening due to wear or force during long-term use, and ensures the reliability of the prosthetic suspension system.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0063] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A prosthesis with detachable joints, comprising a thigh prosthesis (4), a lower leg prosthesis (17), and a foot prosthesis (18), characterized in that: A waist belt (1) is provided directly above the thigh prosthesis (4). Fixing blocks (9) and Velcro barbed surfaces (8) are fixedly connected to both the front and rear sides of the thigh prosthesis (4). A groove (10) is provided on the fixing block (9). A connecting strap (5) is movably inserted through the inner cavity of the groove (10). A Velcro barbed surface (7) is fixedly connected to the side of the connecting strap (5) near the thigh prosthesis (4). A first connecting rod (15) is fixedly connected to the bottom of the thigh prosthesis (4). A plurality of first perforations (16) are provided on the first connecting rod (15). Two second perforations (19) are provided on the outer wall of the lower leg prosthesis (17). A connecting shaft (20) is movably inserted through the inner cavity of one of the first perforations (16). The two ends of the connecting shaft (20) movably insert through the adjacent second perforations (19). A threaded tube (22) is sleeved on the outer side of the first connecting rod (15). A bearing (24) is fixedly sleeved on the bottom outer side of the threaded tube (22). Positioning rods (25) are fixedly connected to both sides of the bearing (24). Two limiting holes (21) are provided on the connecting shaft (20).

2. The prosthesis with detachable joints as described in claim 1, characterized in that: One end of the belt (1) is fixedly connected to a buckle (2), and the belt (1) has several fixing holes (3), which are matched with the buckle (2).

3. A prosthesis with a detachable joint as described in claim 1, characterized in that: The fixing block (9) is located above the hook and loop serrated surface (8), and the hook and loop serrated surface (8) and the hook and loop serrated surface (7) are attached to each other.

4. A prosthesis with a detachable joint as described in claim 1, characterized in that: A connecting ring (6) is fixedly connected to the top of the connecting belt (5), and the connecting ring (6) is movably sleeved on the outside of the waist belt (1).

5. A prosthesis with a detachable joint as described in claim 1, characterized in that: The fixing block (9) has a screw hole (11) on the side away from the thigh prosthesis (4). A threaded post (12) is provided through the inner cavity of the screw hole (11). A number of anti-slip protrusions (14) are fixedly connected to one end of the threaded post (12), and a knob (13) is fixedly connected to the other end of the threaded post (12).

6. A prosthesis with a detachable joint as described in claim 5, characterized in that: Several anti-slip protrusions (14) are arranged in a circular array, and the anti-slip protrusions (14) are in contact with the adjacent connecting strips (5).

7. A prosthesis with a detachable joint as described in claim 1, characterized in that: The threaded tube (22) is threadedly connected to the first connecting rod (15), and the outer side wall of the first connecting rod (15) is provided with an external thread that matches the threaded tube (22).

8. A prosthesis with a detachable joint as described in claim 1, characterized in that: The two limiting holes (21) are arranged symmetrically about the central axis of the connecting shaft (20). The positioning rod (25) moves through the adjacent limiting holes (21). The cross-section of the positioning rod (25) is L-shaped. The horizontal distance between the bottom ends of the two positioning rods (25) is slightly smaller than the inner top diameter of the lower leg prosthesis (17).

9. A prosthesis with a detachable joint as described in claim 1, characterized in that: Two operating rods (23) are fixedly connected to the outer wall of the threaded tube (22) near the top. The vertical distance between the top of the threaded tube (22) and the bottom of the thigh prosthesis (4) is greater than the length of the vertical part of the positioning rod (25).

10. A prosthesis with a detachable joint as described in claim 1, characterized in that: The thigh prosthesis (4) has several ventilation holes (27) on its outer side wall. A buffer sleeve (28) is fixedly connected to the inner side of the thigh prosthesis (4). A blind hole (29) is opened at the top of the foot prosthesis (18). A second connecting rod (26) is threadedly connected to the inner cavity of the blind hole (29). The second connecting rod (26) is fixedly connected to the bottom of the lower leg prosthesis (17).

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