An implantable upper limb prosthesis for hand replacement

Abstract

The present invention relates to the technical field of upper limb prostheses, and specifically relates to an implantable upper limb prosthesis for hand replacement, which includes a humeral prosthesis and an ulnar prosthesis. Multi-axis connection structures are installed at both end faces of the humeral prosthesis and the ulnar prosthesis for fixation. An automatic adjustment air cushion is provided between the articular surfaces of the humeral prosthesis and the ulnar prosthesis. The automatic adjustment air cushion includes a first airbag, a first automatic inflation and deflation structure, a second airbag, and a second automatic inflation and deflation structure. The multi-axis connection structure includes a synchronous connecting rod, a first bending connecting rod, and a second bending connecting rod. The humeral prosthesis includes a humeral support rod and a humeral joint rotating block. The ulnar prosthesis includes an ulnar support rod and an ulnar rotating block. The present invention can appropriately adjust the gap between the ulnar prosthesis and the humeral prosthesis through the automatic adjustment air cushion, so as to ensure that there will be no phenomenon of swing distortion or wear of the fitting surface, thus meeting the requirements of users and not bringing many troubles to users.

Description

Technical Field

[0001] The present invention relates to an implantable upper limb prosthesis for hand replacement, and particularly to an implantable upper limb prosthesis for hand replacement, belonging to the technical field of upper limb prostheses. Background Art

[0002] A prosthetic limb refers to an artificial limb manufactured by means and methods of engineering technology. A prosthetic limb is a specially designed and fabricated artificial prosthesis for compensating for an amputated limb or an incompletely defective limb, also known as an "artificial limb". Its main function is to replace part of the functions of the lost limb, enabling the amputee to regain certain self-care and working abilities. Its applicable objects are amputees due to diseases, traffic accidents, industrial accidents, sports injuries, etc.

[0003] However, in existing upper limb prostheses, a certain gap is often designed between the ulna prosthesis and the humerus prosthesis in the elbow joint prosthesis, enabling the ulna prosthesis and the humerus prosthesis to swing while being connected. If the gap between the ulna prosthesis and the humerus prosthesis is large, the elbow joint prosthesis will swing greatly and be distorted. If the gap between the ulna prosthesis and the humerus prosthesis is small, the fitting surface of the elbow joint prosthesis will wear greatly, thus failing to meet the requirements of users and bringing many troubles to users.

[0004] Therefore, there is an urgent need for an implantable upper limb prosthesis for hand replacement to solve the above existing problems. Summary of the Invention

[0005] The purpose of the present invention is to provide an implantable upper limb prosthesis for hand replacement. This device can appropriately adjust the gap between the ulna prosthesis and the humerus prosthesis through an automatically adjustable air cushion pad, ensuring that there will be no phenomenon of swing distortion or fitting surface wear, thus meeting the requirements of users and not bringing many troubles to users.

[0006] To achieve the above object, the main technical solutions adopted by the present invention include: a humeral prosthesis and an ulnar prosthesis. Both end faces of the humeral prosthesis and the ulnar prosthesis are fixedly connected through a multi-axis connection structure. An automatic adjustment air cushion is arranged between the articular surfaces of the humeral prosthesis and the ulnar prosthesis. The automatic adjustment air cushion includes a first airbag snap-fitted on the articular surface of the humeral prosthesis, a first automatic inflation and deflation structure symmetrically communicated above the first airbag, a second airbag snap-fitted on the articular surface of the ulnar prosthesis, and a second automatic inflation and deflation structure symmetrically communicated above the second airbag. The multi-axis connection structure includes a synchronous connecting rod, a first bent connecting rod rotatably connected to one end of the synchronous connecting rod, and a second bent connecting rod rotatably connected to the other end of the synchronous connecting rod. The humeral prosthesis includes a humeral support rod and a humeral joint rotating block arranged on the humeral support rod near one end face of the ulnar prosthesis. The ulnar prosthesis includes an ulnar support rod and an ulnar joint rotating block arranged on the ulnar support rod near one end face of the humeral prosthesis.

[0007] Preferably, a number of first T-shaped snap-in grooves are formed on the articular surface of the humeral joint rotating block. The first airbag is provided with a number of first T-shaped snap-in blocks adapted to the first T-shaped snap-in grooves on the contact surface with the articular surface of the humeral joint rotating block. Both ends of the first airbag are fixed to the upper end face edge of the humeral joint rotating block by bolts. Rubber limit strips are arranged at both end face edges of the contact surface of the first airbag with the second airbag.

[0008] Preferably, a number of second T-shaped snap-in grooves are formed on the articular surface of the ulnar joint rotating block. The second airbag is provided with a number of second T-shaped snap-in blocks adapted to the second T-shaped snap-in grooves on the contact surface with the articular surface of the ulnar joint rotating block. Both ends of the second airbag are fixed to the upper end face edge of the ulnar joint rotating block by bolts.

[0009] Preferably, the first automatic inflation and deflation structure includes a first compressed air tank, a first connecting pipe communicated with the lower surface of the first compressed air tank, a first air extraction and discharge pump communicated with the lower port of the first connecting pipe, a second connecting pipe communicated with the first air extraction and discharge pump, and a first ball valve arranged on the second connecting pipe.

[0010] Preferably, the second automatic inflation and deflation structure includes a second compressed air tank, a third connecting pipe communicated with the lower surface of the second compressed air tank, a second air extraction and discharge pump communicated with the lower port of the third connecting pipe, a fourth connecting pipe communicated with the second air extraction and discharge pump, and a second ball valve arranged on the fourth connecting pipe.

[0011] Preferably, the first compressed gas tank and the first air extraction pump are both fixed to the humerus support rod by bolts. The second connecting pipe is communicated with the first airbag. The second compressed gas tank and the second air extraction pump are both fixed to the ulna support rod by bolts. The fourth connecting pipe is communicated with the second airbag.

[0012] Preferably, the first bent connecting rod includes a first rotating base rotatably connected to the humerus joint rotating block, a first telescopic rod hinged to the first rotating base, a second rotating base rotatably connected to the ulna joint rotating block, a second telescopic rod hinged to the second rotating base, and a first connecting block hinged to the telescopic ends of the first telescopic rod and the second telescopic rod.

[0013] Preferably, the second bent connecting rod includes a third rotating base rotatably connected to the humerus joint rotating block, a third telescopic rod hinged to the third rotating base, a fourth rotating base rotatably connected to the ulna joint rotating block, a fourth telescopic rod hinged to the fourth rotating base, and a second connecting block hinged to the telescopic ends of the third telescopic rod and the fourth telescopic rod.

[0014] Preferably, the first telescopic rod is fixedly hinged to the first rotating base by bolts, the second telescopic rod is fixedly hinged to the second rotating base by bolts, the third telescopic rod is fixedly hinged to the third rotating base by bolts, the fourth telescopic rod is fixedly hinged to the fourth rotating base by bolts. The synchronous connecting rod is composed of two connecting plates respectively rotatably connected to both sides of the first connecting block and the second connecting block.

[0015] The present invention has at least the following beneficial effects:

[0016] 1. The invention can make appropriate adjustments to the gap between the ulna prosthesis and the humerus prosthesis through the mutual cooperation among the first airbag, the first automatic air charging and discharging structure, the second airbag and the second automatic air charging and discharging structure in the airbag pad, so as to ensure that there will be no swing distortion or wear of the fitting surface, thus meeting the requirements of users and not bringing many troubles to users.

[0017] 2. The invention can make the synchronous rotation connection between the humerus prosthesis and the ulna prosthesis more stable through the mutual cooperation among the first bent connecting rod, the second bent connecting rod and the synchronous connecting rod in the multi-axis connection structure. At the same time, it should be the linkage of multiple structures, which makes each structure evenly stressed, so that the connection structure is more stable and has a longer service life.

[0018] 3. The invention can make the first airbag not shift on the humeral joint rotating block through the mutual cooperation between the first T-shaped card slot and the first T-shaped card block. At the same time, it can also make the second airbag not shift on the ulnar joint rotating block through the mutual cooperation between the second T-shaped card slot and the second T-shaped card block, thereby making the device more stable and reducing the damage rate of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 is a schematic diagram of the structure of the automatic adjustment airbag pad of the present invention;

[0022] Figure 3 is a schematic diagram of the structures of the humeral prosthesis and the ulnar prosthesis of the present invention;

[0023] Figure 4 is a schematic diagram of the humeral prosthesis and its external attachment structure of the present invention;

[0024] Figure 5 is a schematic diagram of the ulnar prosthesis and its external attachment structure of the present invention;

[0025] Figure 6 is a schematic diagram of the overall structure of the multi-axis connection of the present invention;

[0026] Figure 7 is a schematic diagram of the specific structure of the multi-axis connection of the present invention;

[0027] Figure 8 is a schematic diagram of the semi-section inner side of the automatic adjustment airbag pad of the present invention;

[0028] Figure 9 is a schematic diagram of the semi-section outer side of the automatic adjustment airbag pad of the present invention.

[0029] In the figure, 1 is the humeral prosthesis; 2 is the ulnar prosthesis; 3 is the multi-axis connection structure; 4 is the automatic adjustment airbag pad; 5 is the first airbag; 6 is the first automatic inflation and deflation structure; 7 is the second airbag; 8 is the second automatic inflation and deflation structure; 9 is the synchronous connecting rod; 10 is the first curved connecting rod; 11 is the humeral joint rotating block; 12 is the humeral support rod; 13 is the ulnar support rod; 14 is the ulnar joint rotating block; 15 is the first T-shaped clamping groove; 16 is the first T-shaped clamping block; 17 is the second T-shaped clamping groove; 18 is the second T-shaped clamping block; 19 is the first compressed air tank; 20 is the first connecting pipe; 21 is the first air extraction and pumping pump; 22 is the second connecting pipe; 23 is the first ball valve; 24 is the second compressed air tank; 25 is the third connecting pipe; 26 is the second air extraction and pumping pump; 27 is the fourth connecting pipe; 28 is the first rotating base; 29 is the first telescopic rod; 30 is the second rotating base; 31 is the second telescopic rod; 32 is the first connecting block; 33 is the third rotating base; 34 is the third telescopic rod; 35 is the fourth rotating base; 36 is the fourth telescopic rod; 37 is the second connecting block; 38 is the rubber limit strip; 39 is the second ball valve; 40 is the connecting plate; 41 is the second curved connecting rod. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] As Figures 1 - 9As shown in the figure, an implantable upper limb prosthesis for hand replacement provided in this embodiment includes a humeral prosthesis 1 and a ulnar prosthesis 2. Both end faces of the humeral prosthesis 1 and the ulnar prosthesis 2 are fixedly connected through a multi-axis connection structure 3. An automatic adjustment air cushion 4 is arranged between the joint surfaces of the humeral prosthesis 1 and the ulnar prosthesis 2. The automatic adjustment air cushion 4 includes a first airbag 5 snap-fitted on the joint surface of the humeral prosthesis 1, a first automatic inflation and deflation structure 6 symmetrically communicated above the first airbag 5, a second airbag 7 snap-fitted on the joint surface of the ulnar prosthesis 2, and a second automatic inflation and deflation structure 8 symmetrically communicated above the second airbag 7. The multi-axis connection structure 3 includes a synchronous connecting rod 9, a first bent connecting rod 10 rotatably connected to one end of the synchronous connecting rod 9, and a second bent connecting rod 41 rotatably connected to the other end of the synchronous connecting rod 9. The humeral prosthesis 1 includes a humeral support rod 12 and a humeral joint rotating block 11 arranged on the humeral support rod 12 near one end face of the ulnar prosthesis 2. The ulnar prosthesis 2 includes an ulnar support rod 13 and an ulnar joint rotating block 14 arranged on the ulnar support rod 13 near one end face of the humeral prosthesis 1. The humeral prosthesis 1 and the ulnar prosthesis 2 are convenient for supporting the prosthetic limb, and at the same time enable the prosthetic limb to swing to a certain extent, thereby making the prosthetic limb more vivid and appropriate. The multi-axis connection structure 3 is convenient for rotatably connecting the humeral prosthesis 1 and the ulnar prosthesis 2 together. The automatic adjustment air cushion 4 is convenient for filling the gap between the humeral prosthesis 1 and the ulnar prosthesis 2 after they are rotatably connected together, so as to protect the joint surface of the humeral joint rotating block 11 and the ulnar joint rotating block 14. The swing degree between the rotations of the humeral prosthesis 1 and the ulnar prosthesis 2 can also be adjusted through the self-adjustment of the automatic adjustment air cushion 4. The first airbag 5 is convenient for wrapping the humeral joint rotating block 11 and protecting the humeral joint rotating block 11. The first automatic inflation and deflation structure 6 is convenient for automatically inflating the first airbag 5. The second airbag 7 is convenient for wrapping the ulnar joint rotating block 14 and protecting the humeral joint rotating block 11. The second automatic inflation and deflation structure 8 is convenient for automatically inflating the second airbag 7. At the same time, the first airbag 5 and the second airbag 7 cooperate with each other to enable the automatic adjustment air cushion 4 to fill the gap between the humeral prosthesis 1 and the ulnar prosthesis 2. The synchronous connecting rod 9 is convenient for rotatably connecting the first bent connecting rod 10 and the second bent connecting rod 41 together, so that the first bent connecting rod 10 and the second bent connecting rod 41 can move synchronously. The first bent connecting rod 10 and the second bent connecting rod 41 are convenient for rotatably connecting the humeral prosthesis 1 and the ulnar prosthesis 2 together in multiple axes. The humeral support rod 12 is convenient for connecting and fixing the humeral joint rotating block 11. The ulnar support rod 13 is convenient for connecting and fixing the ulnar joint rotating block 14. The humeral joint rotating block 11 and the ulnar joint rotating block 14 are convenient for realizing the rotational connection between the humeral prosthesis 1 and the ulnar prosthesis 2.

[0032] In this embodiment, as Figure 2 , Figure 3 ,Figure 4 , Figure 8 and Figure 9 As shown, a number of first T-shaped clamping grooves 15 are provided on the joint surface of the humeral joint rotating block 11. A number of first T-shaped clamping blocks 16 adapted to the first T-shaped clamping grooves 15 are provided on the contact surface of the first airbag 5 with the joint surface of the humeral joint rotating block 11. Both ends of the first airbag 5 are fixed to the edge of the upper end surface of the humeral joint rotating block 11 by bolts. Rubber limit strips 38 are provided at the edges of both end surfaces of the contact surface of the first airbag 5 with the second airbag 7. The first T-shaped clamping grooves 15 and the first T-shaped clamping blocks 16 facilitate clamping and fixing the first airbag 5 on the joint surface of the humeral joint rotating block 11, thereby preventing the first airbag 5 of the device from shifting and sliding on the joint surface of the humeral joint rotating block 11 during operation. The rubber limit strips 38 facilitate limiting the second airbag 7.

[0033] In this embodiment, as shown in Figure 2 , Figure 3 , Figure 5 , Figure 8 and Figure 9 As shown, a number of second T-shaped clamping grooves 17 are provided on the joint surface of the ulnar joint rotating block 14. A number of second T-shaped clamping blocks 18 adapted to the second T-shaped clamping grooves 17 are provided on the contact surface of the second airbag 7 with the joint surface of the ulnar joint rotating block 14. Both ends of the second airbag 7 are fixed to the edge of the upper end surface of the ulnar joint rotating block 14 by bolts. The second T-shaped clamping grooves 17 and the second T-shaped clamping blocks 18 facilitate clamping and fixing the second airbag 7 on the joint surface of the ulnar joint rotating block 14.

[0034] In this embodiment, as shown in Figure 2 , Figure 4 , Figure 8 and Figure 9 As shown, the first automatic air charging and discharging structure 6 includes a first compressed air tank 19, a first connecting pipe 20 connected to the lower surface of the first compressed air tank 19, a first air pumping and discharging pump 21 connected to the lower port of the first connecting pipe 20, a second connecting pipe 22 connected to the first air pumping and discharging pump 21, and a first ball valve 23 provided on the second connecting pipe 22. The first compressed air tank 19 facilitates storing compressed gas. The first connecting pipe 20 facilitates connecting the first compressed air tank 19 and the first air pumping and discharging pump 21 together. The first air pumping and discharging pump 21 facilitates pumping the compressed gas in the first compressed air tank 19 into the first airbag 5, or pumping the compressed gas in the first airbag 5 back into the first compressed air tank 19. The second connecting pipe 22 facilitates connecting the first air pumping and discharging pump 21 and the first airbag 5 together. The first ball valve 23 facilitates closing or opening the second connecting pipe 22, and can prevent the gas in the first airbag 5 from being squeezed and flowing back into the first compressed air tank 19.

[0035] In this embodiment, as shown in Figure 2 , Figure 5 ,Figure 8 and Figure 9 As shown in Figure 9 , the second automatic charging and discharging structure 8 includes a second compressed air tank 24, a third connecting pipe 25 connected to the lower surface of the second compressed air tank 24, a second air extraction and discharge pump 26 connected to the lower port of the third connecting pipe 25, a fourth connecting pipe 27 connected to the second air extraction and discharge pump 26, and a second ball valve 39 provided on the fourth connecting pipe 27. The second compressed air tank 24 is convenient for storing compressed gas. The third connecting pipe 25 is convenient for connecting the second compressed air tank 24 and the second air extraction and discharge pump 26 together. The second air extraction and discharge pump 26 is convenient for pumping the compressed gas in the second compressed air tank 24 into the second airbag 7, or pumping the compressed gas in the second airbag 7 back into the second compressed air tank 24. The fourth connecting pipe 27 is convenient for connecting the second air extraction and discharge pump 26 and the second airbag 7 together. The second ball valve 39 is convenient for closing or opening the fourth connecting pipe 27, and can prevent the gas in the second airbag 7 from being squeezed and flowing back into the second compressed air tank 24.

[0036] In this embodiment, as Figure 1 , Figure 4 , Figure 8 and Figure 9 shown, both the first compressed air tank 19 and the first air extraction and discharge pump 21 are fixed to the humerus support rod 12 by bolts. The second connecting pipe 22 is connected to the first airbag 5, which is convenient for fixedly installing the first automatic charging and discharging structure 6 on the humerus prosthesis 1 by bolts. Both the second compressed air tank 24 and the second air extraction and discharge pump 26 are fixed to the ulna support rod 13 by bolts. The fourth connecting pipe 27 is connected to the second airbag 7, which is convenient for fixedly installing the second automatic charging and discharging structure 8 on the ulna prosthesis 2 by bolts.

[0037] In this embodiment, as Figure 1 , Figure 6 and Figure 7 shown, the first bending connecting rod 10 includes a first rotating base 28 rotatably connected to the humerus joint rotating block 11, a first telescopic rod 29 hinged to the first rotating base 28, a second rotating base 30 rotatably connected to the ulna joint rotating block 14, a second telescopic rod 31 hinged to the second rotating base 30, and a first connecting block 32 hinged to the telescopic ends of the first telescopic rod 29 and the second telescopic rod 31. The first rotating base 28 is convenient for rotatably connecting the first telescopic rod 29 to the humerus joint rotating block 11. The second rotating base 30 is convenient for rotatably connecting the second telescopic rod 31 to the ulna joint rotating block 14. The first telescopic rod 29 and the second telescopic rod 31 are convenient for realizing the bending swing between the humerus prosthesis 1 and the ulna prosthesis 2 through their own telescoping. The first connecting block 32 is convenient for connecting the telescopic ends of the first telescopic rod 29 and the second telescopic rod 31 together.

[0038] In this embodiment, as Figure 1 ,Figure 6 and Figure 7 As shown in Figure 7 , the second bending connecting rod 41 includes a third rotating base 33 rotatably connected to the humeral joint rotating block 11, a third telescopic rod 34 hinged to the third rotating base 33, a fourth rotating base 35 rotatably connected to the ulnar joint rotating block 14, a fourth telescopic rod 36 hinged to the fourth rotating base 35, and a second connecting block 37 hinged to the telescopic ends of the third telescopic rod 34 and the fourth telescopic rod 36. The third rotating base 33 facilitates rotatably connecting the third telescopic rod 34 to the humeral joint rotating block 11, the fourth rotating base 35 facilitates rotatably connecting the fourth telescopic rod 36 to the ulnar joint rotating block 14. The third telescopic rod 34 and the fourth telescopic rod 36 facilitate the bending swing between the humeral prosthesis 1 and the ulnar prosthesis 2 through their own telescoping, and the second connecting block 37 facilitates connecting the telescopic ends of the third telescopic rod 34 and the fourth telescopic rod 36 together.

[0039] In this embodiment, as Figure 1 、 Figure 6 and Figure 7 shown, the first telescopic rod 29 is fixedly hinged to the first rotating base 28 by bolts, the second telescopic rod 31 is fixedly hinged to the second rotating base 30 by bolts, the third telescopic rod 34 is fixedly hinged to the third rotating base 33 by bolts, and the fourth telescopic rod 36 is fixedly hinged to the fourth rotating base 35 by bolts, which facilitates the replacement or maintenance of the first telescopic rod 29, the second telescopic rod 31, the third telescopic rod 34, and the fourth telescopic rod 36. The synchronous connecting rod 9 is composed of two connecting plates 40 respectively rotatably connected to both sides of the first connecting block 32 and the second connecting block 37. The connecting plates 40 facilitate rotatably connecting the first connecting block 32 and the second connecting block 37 together, thereby realizing the multi-axis mutual linkage of the first bending connecting rod 10 and the second bending connecting rod 41.

[0040] In this embodiment, as Figures 1 - 9 shown, the operation of an implantable upper limb prosthesis for hand replacement provided in this embodiment includes the following:

[0041] Step 1: First, the humeral prosthesis 1 should be taken out, and then the first airbag 5 is snap-fitted and installed on the humeral joint rotating block 11 through the first T-shaped snap-in block 16. At this time, it is necessary to ensure that the first T-shaped snap-in block 16 is snap-fitted in the first T-shaped snap-in groove 15. Subsequently, the first air pumping and discharging pump 21 is fixedly installed on the humeral support rod 12 by bolts, and at the same time, the first compressed gas tank 19 is fixedly installed on the humeral support rod 12 by bolts;

[0042] Step 2: Then take out the ulna prosthesis 2, and then install the second airbag 7 on the ulna joint rotating block 14 by clamping it with the second T-shaped clamping block 18. At this time, it is necessary to ensure that the second T-shaped clamping block 18 is clamped in the second T-shaped clamping groove 17. Subsequently, fix and install the second air pump 26 on the ulna support rod 13 with bolts, and at the same time, fix and install the second compressed air tank 24 on the ulna support rod 13 with bolts;

[0043] Step 3: Then fix and hinge the first telescopic rod 29 to the first rotating base 28 with bolts, then fix and hinge the second telescopic rod 31 to the second rotating base 30 with bolts, then fix and hinge the third telescopic rod 34 to the third rotating base 33 with bolts, and then fix and hinge the fourth telescopic rod 36 to the fourth rotating base 35 with bolts. At this time, the humerus prosthesis 1 and the ulna prosthesis 2 can be rotationally connected together through the multi-axis connection structure 3, which can realize the mutual linkage between the humerus prosthesis 1 and the ulna prosthesis 2;

[0044] Step 4: When the device is operating, the first air pump 21 starts to operate, then the first ball valve 23 is opened, and then the gas in the first compressed air tank 19 will quickly flow into the first airbag 5. At this time, the first airbag 5 can be filled, and then the first ball valve 23 is closed. At the same time, the second air pump 26 also starts to operate, then the second ball valve 39 is opened, and then the gas in the second compressed air tank 24 will quickly flow into the second airbag 7. At this time, the second airbag 7 can be filled, and then the second ball valve 39 is closed;

[0045] Step 5: This can fill the swing space left between the humerus prosthesis 1 and the ulna prosthesis 2. When a certain degree of swing is required between the humerus prosthesis 1 and the ulna prosthesis 2, the first ball valve 23 can be opened, and then the first air pump 21 starts to operate and pumps the gas in the first airbag 5 back into the first compressed air tank 19, and then the first ball valve 23 is closed. At the same time, the second ball valve 39 can be opened, and then the second air pump 26 starts to operate and pumps the gas in the second airbag 7 back into the first compressed air tank 19, and then the second ball valve 39 is closed. This can reduce the friction between the first airbag 5 and the second airbag 7, enabling the regulation of the swing degree between the humerus prosthesis 1 and the ulna prosthesis 2. At the same time, the first airbag 5 and the second airbag 7 can also protect the humerus joint rotating block 11 and the ulna joint rotating block 14 to prevent wear of the humerus joint rotating block 11 and the ulna joint rotating block 14.

[0046] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but rather use the difference in the functions of components as the criterion for distinction. As used throughout the specification and claims, "comprising" is an open-ended term and should be interpreted as "comprising but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effects.

[0047] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or system including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the commodity or system including the element.

[0048] The above description illustrates and describes several preferred embodiments of the present invention. However, as previously mentioned, it should be understood that the present invention is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. An implantable upper limb prosthesis for hand replacement, comprising a humeral prosthesis (1) and an ulnar prosthesis (2), characterized in that: The two end surfaces of the humeral prosthesis (1) and the ulnar prosthesis (2) are fixedly connected via a multi-axial connection structure (3); an automatically adjustable airbag cushion (4) is arranged between the joint surfaces of the humeral prosthesis (1) and the ulnar prosthesis (2); the automatically adjustable airbag cushion (4) comprises a first airbag (5) mounted on the joint surface of the humeral prosthesis (1); a first automatic inflation and deflation structure (6) symmetrically connected and arranged above the first airbag (5); a second airbag (7) mounted on the joint surface of the ulnar prosthesis (2); and a second automatic inflation and deflation structure (8) symmetrically connected and arranged above the second airbag (7). The multi-axis connection structure (3) comprises a synchronous connection rod (9), a first curved connection rod (10) rotatably connected to one end of the synchronous connection rod (9), and a second curved connection rod (41) rotatably connected to the other end of the synchronous connection rod (9); the humeral prosthesis (1) comprises a humeral support rod (12) and a humeral joint rotation block (11) arranged on the humeral support rod (12) near one end surface of the ulnar prosthesis (2); the ulnar prosthesis (2) comprises an ulnar support rod (13) and an ulnar joint rotation block (14) arranged on the ulnar support rod (13) near one end surface of the humeral prosthesis (1); A plurality of first T-shaped snap-in grooves (15) are provided on the joint surface of the humeral joint transfer block (11); a plurality of first T-shaped snap-in blocks (16) adapted to the first T-shaped snap-in grooves (15) are provided on the contact surface of the first airbag (5) with the joint surface of the humeral joint transfer block (11); two ends of the first airbag (5) are fixed to the upper end surface edge of the humeral joint transfer block (11) by bolts; and rubber limit strips (38) are provided on the two end surface edges of the contact surface of the first airbag (5) with the second airbag (7); The joint surface of the ulnar joint transfer block (14) is provided with a plurality of second T-shaped snap-in grooves (17); the second airbag (7) is provided with a plurality of second T-shaped snap-in blocks (18) adapted to the second T-shaped snap-in grooves (17) on the contact surface with the joint surface of the ulnar joint transfer block (14); and the two ends of the second airbag (7) are fixed to the edge of the upper end surface of the ulnar joint transfer block (14) by bolts.

2. The implantable upper limb prosthesis for hand replacement according to claim 1, characterized in that: The first automatic inflation and deflation structure (6) comprises a first compressed gas tank (19), a first connecting pipe (20) connected to the lower surface of the first compressed gas tank (19), a first exhaust air pump (21) connected to the lower end of the first connecting pipe (20), a second connecting pipe (22) connected to the first exhaust air pump (21), and a first ball valve (23) provided on the second connecting pipe (22).

3. The implantable upper limb prosthesis for hand replacement according to claim 2, characterized in that: The second automatic inflation and deflation structure (8) comprises a second compressed gas tank (24), a third connecting pipe (25) connected to the lower surface of the second compressed gas tank (24), a second exhaust air pump (26) connected to the lower port of the third connecting pipe (25), a fourth connecting pipe (27) connected to the second exhaust air pump (26), and a second ball valve (39) provided on the fourth connecting pipe (27).

4. The implantable upper limb prosthesis for hand replacement according to claim 3, characterized in that: The first compressed air tank (19) and the first extraction and degassing air pump (21) are both fixed to the humeral support rod (12) by bolts, the second connecting pipe (22) is connected to the first air bag (5), the second compressed air tank (24) and the second extraction and degassing air pump (26) are both fixed to the ulnar support rod (13) by bolts, and the fourth connecting pipe (27) is connected to the second air bag (7).

5. The implantable upper limb prosthesis for hand replacement according to claim 1, characterized in that: The first curved connecting rod (10) comprises a first rotating base (28) rotatably connected to the humeral joint rotating block (11), a first telescopic rod (29) hingedly connected to the first rotating base (28), a second rotating base (30) rotatably connected to the ulnar joint rotating block (14), a second telescopic rod (31) hingedly connected to the second rotating base (30), and a first connecting block (32) hingedly connected to the telescopic ends of the first telescopic rod (29) and the second telescopic rod (31).

6. The implantable upper limb prosthesis for hand replacement according to claim 5, characterized in that: The second curved connecting rod (41) comprises a third rotating base (33) rotatably connected to the humeral joint rotating block (11), a third telescopic rod (34) hingedly connected to the third rotating base (33), a fourth rotating base (35) rotatably connected to the ulnar joint rotating block (14), a fourth telescopic rod (36) hingedly connected to the fourth rotating base (35), and a second connecting block (37) hingedly connected to the telescopic ends of the third telescopic rod (34) and the fourth telescopic rod (36).

7. The implantable upper limb prosthesis for hand replacement according to claim 6, characterized in that: The first telescopic rod (29) is fixedly hinged on the first rotating base (28) by bolts, the second telescopic rod (31) is fixedly hinged on the second rotating base (30) by bolts, the third telescopic rod (34) is fixedly hinged on the third rotating base (33) by bolts, the fourth telescopic rod (36) is fixedly hinged on the fourth rotating base (35) by bolts, and the synchronous connecting rod (9) is composed of two connecting plates (40) which are rotatably connected to both sides of the first connecting block (32) and the second connecting block (37), respectively.

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