CN114028043A

CN114028043A - Bionic finger prosthesis

Info

Publication number: CN114028043A
Application number: CN202111485573.4A
Authority: CN
Inventors: 付中国; 谢亚杰; 陆益栋
Original assignee: Shanghai Heiyan Medical Technology Co ltd
Current assignee: Shanghai Heiyan Medical Technology Co ltd; Shanghai Yanyi Digital Medical Technology Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-02-11

Abstract

The invention discloses a bionic finger prosthesis, and relates to the technical field of human body prostheses. The bionic finger prosthesis comprises a near knuckle sleeve, a middle knuckle sleeve, a far knuckle prosthesis and a linkage rope. One end of the middle knuckle sleeve is hinged with the near knuckle sleeve, the other end of the middle knuckle sleeve is hinged with the far knuckle artificial limb, one end of the linkage rope is connected to the back of the near knuckle sleeve, the other end of the linkage rope penetrates through the middle knuckle sleeve and is connected with the far knuckle artificial limb, the near knuckle sleeve is used for being sleeved outside a near knuckle of a disabled person, the middle knuckle sleeve is used for being sleeved outside a middle knuckle of the disabled person, and the middle knuckle sleeve can rotate relative to the near knuckle sleeve when the middle knuckle is bent, so that the linkage rope pulls the far knuckle artificial limb to rotate relative to the middle knuckle sleeve. The bionic finger prosthesis provided by the invention can realize the bending function of the finger joint, is convenient for grabbing action, and has the advantages of good flexibility, simple wearing process, high wearing efficiency and good user experience.

Description

Bionic finger prosthesis

Technical Field

The invention relates to the technical field of human body artificial limbs, in particular to a bionic finger artificial limb.

Background

At present, for the disabled people losing part of finger knuckles, in order to ensure daily activities, the disabled people generally install finger prostheses on the hands of the disabled people. But present finger artificial limb is mostly integrated fixed knot constructs, does not possess the crooked function of finger joint, leads to the disabled person can't realize the action of snatching, and the flexibility is poor to present finger artificial limb wearing process is loaded down with trivial details, and wearing efficiency is low, and user experience feels poor.

In view of this, it is important to design and manufacture a bionic finger prosthesis which is convenient, flexible and convenient to wear, especially in the production of the prosthesis.

Disclosure of Invention

The invention aims to provide a bionic finger prosthesis which can realize the bending function of a finger joint, is convenient for grabbing action, has good flexibility, simple wearing process and high wearing efficiency, and is good in user experience.

The invention is realized by adopting the following technical scheme.

A bionic finger prosthesis is applied to a disabled person with a missing far knuckle and comprises a near knuckle sleeve, a middle knuckle sleeve, a far knuckle prosthesis and a linkage rope, wherein one end of the middle knuckle sleeve is hinged to the near knuckle sleeve, the other end of the middle knuckle sleeve is hinged to the far knuckle prosthesis, one end of the linkage rope is connected to the back face of the near knuckle sleeve, the other end of the linkage rope penetrates through the middle knuckle sleeve and is connected with the far knuckle prosthesis, the near knuckle sleeve is used for being sleeved outside the near knuckle of the disabled person, the middle knuckle sleeve is used for being sleeved outside the middle knuckle of the disabled person, the middle knuckle sleeve can rotate relative to the near knuckle sleeve when the middle knuckle is bent, the linkage rope pulls the far knuckle prosthesis to rotate relative to the middle knuckle sleeve, namely the middle knuckle sleeve can rotate when the middle knuckle of the disabled person makes bending movement, and the linkage rope pulls the far knuckle prosthesis to bend relative to the middle knuckle sleeve.

Optionally, the bionic finger prosthesis further comprises a limiting frame, and the proximal knuckle sleeve is hinged with the middle knuckle sleeve through the limiting frame.

Optionally, the spacing includes support body, first articulated elements and second articulated elements, and first articulated elements and the parallel interval of second articulated elements set up, and all install on the support body, and first hinge hole has been seted up to nearly knuckle cover, and first articulated elements rotationally sets up in first hinge hole, and the second hinge hole has been seted up to well knuckle cover, and the second articulated elements rotationally sets up in the second hinge hole.

Optionally, the lead wire hole has been seted up at the back of spacing frame, and the linkage rope passes the lead wire hole setting, and the lead wire hole is used for spacing and direction the linkage rope.

Optionally, the number of the lead holes is two, and the two lead holes are coaxially arranged at intervals and are oppositely arranged on two sides of the limiting frame.

Optionally, the proximal knuckle sleeve comprises a first elastic band and a first framework, the first elastic band is connected with the first framework, the first framework is hinged to the middle knuckle sleeve, and the first elastic band is used for binding the first framework outside the proximal knuckle.

Optionally, the middle knuckle sleeve comprises a second elastic band and a second skeleton, the second elastic band is connected with the second skeleton, one end of the second skeleton is hinged to the proximal knuckle sleeve, the other end of the second skeleton is hinged to the distal knuckle prosthesis, and the second elastic band is used for tying the second skeleton outside the middle knuckle.

Optionally, the second skeleton is provided with a through hole, and the linkage rope passes through the through hole and is connected with the distal knuckle prosthesis.

Optionally, the distal knuckle prosthesis comprises a distal knuckle part, a connecting part and a hinged part, wherein the connecting part and the hinged part are both fixedly connected to the distal knuckle part, the connecting part is connected with the linkage rope, and the hinged part is hinged to the middle knuckle sleeve.

Optionally, the hinge portion comprises a first hinge block, a second hinge block and a hinge shaft, the first hinge block and the second hinge block are arranged in parallel at intervals and are fixedly connected with the distal knuckle portion, and the hinge shaft penetrates through the first hinge block and the second hinge block and can rotate relative to the middle knuckle sleeve.

Optionally, the bionic finger prosthesis further comprises a torsion spring, the torsion spring is sleeved outside the hinge shaft and is arranged between the first hinge block and the second hinge block, one end of the torsion spring abuts against the far knuckle part, and the other end of the torsion spring abuts against the middle knuckle sleeve.

Optionally, the artificial finger prosthesis further comprises a bionic muscle layer and an artificial skin, the bionic muscle layer is sleeved outside the distal knuckle prosthesis, and the artificial skin is sleeved outside the bionic muscle layer.

The bionic finger prosthesis provided by the invention has the following beneficial effects:

according to the bionic finger prosthesis provided by the invention, one end of the middle knuckle sleeve is hinged with the near knuckle sleeve, the other end of the middle knuckle sleeve is hinged with the far knuckle prosthesis, one end of the linkage rope is connected to the back of the near knuckle sleeve, the other end of the linkage rope penetrates through the middle knuckle sleeve and is connected with the far knuckle prosthesis, the near knuckle sleeve is used for being sleeved outside a near knuckle of a disabled person, the middle knuckle sleeve is used for being sleeved outside a middle knuckle of the disabled person, and the middle knuckle sleeve can rotate relative to the near knuckle sleeve when the middle knuckle is bent, so that the linkage rope pulls the far knuckle prosthesis to rotate relative to the middle knuckle sleeve. Compared with the prior art, the bionic finger artificial limb provided by the invention adopts the linkage rope connected between the near knuckle sleeve and the far knuckle artificial limb, so that the bending function of a finger joint can be realized, the grabbing action is convenient, the flexibility is good, the wearing process is simple, the wearing efficiency is high, and the user experience is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a bionic finger prosthesis according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of the bionic finger prosthesis provided in the first embodiment of the present invention when straightened;

FIG. 3 is a schematic structural view of a bionic finger prosthesis according to a first embodiment of the present invention during bending;

fig. 4 is an exploded view of a proximal knuckle sleeve hinged to a middle knuckle sleeve through a limiting frame in the bionic finger prosthesis according to the first embodiment of the invention;

fig. 5 is a schematic structural view of a limiting frame in the bionic finger prosthesis according to the first embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a bionic finger prosthesis according to another view angle in the first embodiment of the present invention;

FIG. 7 is a schematic structural view of a distal knuckle prosthesis in a biomimetic finger prosthesis according to a first embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a biomimetic finger prosthesis according to a second embodiment of the present disclosure;

FIG. 9 is a schematic structural view of a bionic finger prosthesis according to a second embodiment of the present invention during straightening;

FIG. 10 is a schematic structural view of a bionic finger prosthesis according to a second embodiment of the present invention during bending;

FIG. 11 is a schematic structural view of a distal knuckle prosthesis hinged to a middle knuckle sleeve in a biomimetic finger prosthesis according to a second embodiment of the present disclosure;

fig. 12 is a sectional view of a biomimetic finger prosthesis provided in a second embodiment of the present invention.

Icon: 100-bionic finger prosthesis; 110-proximal phalangeal sleeve; 111-a first hinge hole; 112-a first elastic belt; 113-a first backbone; 120-middle knuckle sleeve; 121-a second hinge hole; 122-a through hole; 123-a limiting hole; 124-a second elastic band; 125-a second backbone; 126-positioning holes; 130-distal knuckle prosthesis; 131-distal knuckle; 132-a connecting portion; 133-a hinge; 134-a first hinge block; 135-a second articulated block; 136-a hinge axis; 140-a linkage rope; 150-a limiting frame; 151-frame body; 152-a first hinge; 153-a second hinge; 154-wire holes; 160-torsion spring; 170-bionic muscle layer; 180-artificial skin.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1, 2 and 3, an embodiment of the invention provides a bionic finger prosthesis 100 for assisting a disabled person in performing daily activities. It can realize finger joint's bending function, is convenient for snatch the action, and the flexibility is good to the wearing process is simple, and wearing efficiency is high, and user experience feels good.

It should be noted that the bionic finger prosthesis 100 is applied to a disabled person who lacks a far knuckle, and if the disabled person lacks a far knuckle and leaves a near knuckle and a middle knuckle, the bionic finger prosthesis 100 may be installed on a hand of the disabled person to replace the far knuckle. In this embodiment, the biomimetic finger prosthesis 100 is used as the index finger of the disabled person, but is not limited thereto, and the biomimetic finger prosthesis 100 may be used as the middle finger of the disabled person, and may also be used as the ring finger of the disabled person, and the application position of the biomimetic finger prosthesis 100 is not particularly limited.

The biomimetic finger prosthesis 100 includes a proximal knuckle sleeve 110, a middle knuckle sleeve 120, a distal knuckle prosthesis 130, a linkage rope 140, a stop frame 150, and a torsion spring 160. The middle knuckle cap 120 is hinged at one end to the proximal knuckle cap 110 and at the other end to the distal knuckle prosthesis 130, the middle knuckle cap 120 being able to rotate relative to the proximal knuckle cap 110 and the distal knuckle prosthesis 130 being able to rotate relative to the middle knuckle cap 120. The linkage cord 140 has one end connected to the back of the proximal knuckle sleeve 110 and the other end passing through the middle knuckle sleeve 120 and connected to the distal knuckle prosthesis 130. The proximal knuckle sleeve 110 is used for being sleeved outside the proximal knuckle of the disabled person, and the middle knuckle sleeve 120 is used for being sleeved outside the middle knuckle of the disabled person. The middle phalangeal sleeve 120 is capable of rotating relative to the proximal phalangeal sleeve 110 during bending of the middle phalanx such that the linkage cord 140 pulls the distal phalangeal prosthesis 130 to rotate relative to the middle phalangeal sleeve 120, i.e., the middle phalangeal sleeve 120 rotates during bending movements of the middle phalanx of the disabled person such that the linkage cord 140 pulls the distal phalangeal prosthesis 130 to bend relative to the middle phalangeal sleeve 120. Therefore, when the middle knuckle sleeve 120 rotates relative to the near knuckle sleeve 110, the far knuckle prosthesis 130 rotates relative to the middle knuckle sleeve 120 to achieve the bending function of the finger joint, so that the grabbing action is facilitated, the flexibility is good, the near knuckle sleeve 110 and the middle knuckle sleeve 120 can be directly sleeved outside the near knuckle and the middle knuckle of the disabled person, the wearing process is simple, the wearing efficiency is high, and the user experience is good.

It should be noted that the proximal knuckle sleeve 110 is hinged to the middle knuckle sleeve 120 through the limiting frame 150, so as to enlarge the maximum angle of relative bending between the proximal knuckle sleeve 110 and the middle knuckle sleeve 120, increase the range of motion, and improve the bionic effect.

In this embodiment, the middle phalangeal sleeve 120 is connected to the distal phalangeal prosthesis 130 via a torsion spring 160, and the torsion spring 160 is disposed between the middle phalangeal sleeve 120 and the distal phalangeal prosthesis 130. Specifically, when the disabled person bends the middle knuckle relative to the proximal knuckle, the linkage cord 140 pulls the distal knuckle prosthesis 130 to rotate relative to the middle knuckle sleeve 120 against the elastic force of the torsion spring 160; when the disabled person straightens the middle knuckle, the linkage rope 140 no longer applies tension to the distal knuckle prosthesis 130, and the distal knuckle prosthesis 130 is reset and straightened under the elastic force of the torsion spring 160.

It should be noted that since the linking strings 140 are fixedly connected to the proximal knuckle sleeve 110 and are disposed through the middle knuckle sleeve 120, the length of the linking strings 140 does not change, so that when the middle knuckle sleeve 120 rotates relative to the proximal knuckle sleeve 110, the linking strings 140 bend along with the middle knuckle sleeve 120, and the linking strings 140 pull the distal knuckle prosthesis 130 to displace toward the middle knuckle sleeve 120, so that the distal knuckle prosthesis 130 rotates relative to the middle knuckle sleeve 120.

Referring to fig. 4 and 5, the limiting frame 150 includes a frame body 151, a first hinge 152 and a second hinge 153. The first hinge 152 and the second hinge 153 are spaced apart in parallel and are both mounted on the frame body 151. The proximal knuckle sleeve 110 defines a first hinge hole 111, the first hinge 152 is rotatably disposed in the first hinge hole 111, and the proximal knuckle sleeve 110 is capable of rotating relative to the first hinge 152. The middle knuckle sleeve 120 is provided with a second hinge hole 121, the second hinge 153 is rotatably disposed in the second hinge hole 121, and the middle knuckle sleeve 120 can rotate relative to the second hinge 153. Specifically, because first articulated elements 152 and second articulated elements 153 interval set up, so well knuckle cover 120 can be bigger for nearly knuckle cover 110 pivoted angle, can reach 90 degrees, increase home range, improve bionic effect, satisfy the disabled person daily life needs.

In this embodiment, the first hinge 152 and the second hinge 153 are both rivets, and the first hinge 152 rivets the frame body 151 and the proximal knuckle guard 110 together, so that the proximal knuckle guard 110 can rotate relative to the frame body 151; the second hinge 153 rivets the frame body 151 with the middle knuckle guard 120 so that the middle knuckle guard 120 can rotate with respect to the frame body 151. But not limited thereto, in other embodiments, the first hinge 152 and the second hinge 153 may be both hinge columns, and also can achieve the function that the proximal knuckle sleeve 110 and the middle knuckle sleeve 120 can rotate relative to the frame body 151, and the type of the first hinge 152 and the second hinge 153 is not particularly limited.

Further, the number of the first hinge holes 111 and the second hinge holes 121 is two, the two first hinge holes 111 are oppositely disposed on two sides of the proximal knuckle sleeve 110, and the two second hinge holes 121 are oppositely disposed on two sides of the middle knuckle sleeve 120. The number of the first hinge members 152 and the second hinge members 153 is two, the two first hinge members 152 are coaxially arranged at intervals, and each first hinge member 152 passes through one first hinge hole 111 and is in rotating fit with the first hinge hole; the two second hinge members 153 are coaxially spaced, and each second hinge member 153 passes through one second hinge hole 121 and is rotatably engaged therewith.

In this embodiment, the lead hole 154 has been seted up at the back of spacing frame 150, and the lead hole 154 is seted up on the support body 151, and the linkage rope 140 passes the lead hole 154 setting, and the lead hole 154 is used for spacing and direction to the linkage rope 140 to guarantee that the linkage rope 140 can follow the back of spacing frame 150 and walk the line, and penetrate from the back of middle knuckle cover 120. Specifically, the back of the proximal knuckle sleeve 110 is the surface of the proximal knuckle sleeve 110 on the back side of the disabled person, the back of the limiting frame 150 is the surface of the limiting frame 150 on the back side of the disabled person, and the back of the middle knuckle sleeve 120 is the surface of the middle knuckle sleeve 120 on the back side of the disabled person.

Referring to fig. 6 and 7, further, a through hole 122 is formed on the back surface of the middle knuckle sleeve 120, and the linking rope 140 can pass through the through hole 122 from the back surface of the middle knuckle sleeve 120 and is connected to the distal knuckle prosthesis 130 to pull the distal knuckle prosthesis 130 to rotate relative to the middle knuckle sleeve 120.

In this embodiment, the number of the lead holes 154 is two, and the two lead holes 154 are coaxially disposed at intervals and are disposed on two sides of the limiting frame 150. The linkage rope 140 sequentially passes through the two lead holes 154, and the two lead holes 154 act together to limit the linkage rope 140, so that the limiting effect is further improved. However, this is not intended to be limiting, and in other embodiments, the number of the lead holes 154 may be one or three, and the number of the lead holes 154 is not particularly limited.

It is worth noting that the proximal knuckle sleeve 110 and the middle knuckle sleeve 120 are both sleeve-shaped, and the size and shape of the proximal knuckle sleeve 110 and the middle knuckle sleeve 120 need to be customized according to the actual situation of the disabled person, so as to ensure that the proximal knuckle sleeve 110 can be fitted with the proximal knuckle of the disabled person and the middle knuckle sleeve 120 can be fitted with the middle knuckle of the disabled person when the bionic finger prosthesis 100 is worn on the hand of the disabled person, and improve the wearing reliability. Further, the distal knuckle prosthesis 130 is shaped like a finger to replace a finger for normal activities.

The distal knuckle prosthesis 130 includes a distal knuckle portion 131, a connecting portion 132, and a hinge portion 133. The connecting portion 132 and the hinge portion 133 are both fixedly connected to the distal knuckle portion 131, and in this embodiment, the distal knuckle portion 131, the connecting portion 132 and the hinge portion 133 are integrally formed to improve the connecting strength. The connecting portion 132 is connected to the link rope 140, the hinge portion 133 is hinged to the middle knuckle sleeve 120, the torsion spring 160 is connected between the hinge portion 133 and the middle knuckle sleeve 120, and the link rope 140 can pull the distal knuckle portion 131 to rotate relative to the middle knuckle sleeve 120 through the connecting portion 132.

In this embodiment, the hinge portions 133 are cylindrical, the number of the hinge portions 133 is two, the two hinge portions 133 are oppositely disposed at two sides of the distal knuckle portion 131, and the middle portion of the middle knuckle sleeve 120 is oppositely disposed with two limiting holes 123. Each hinge 133 extends into one of the limiting holes 123 and can rotate relative to the limiting hole 123, and the limiting hole 123 can limit the hinge 133 to achieve the function of the distal knuckle prosthesis 130 rotating relative to the middle knuckle sleeve 120.

Further, the number of the torsion springs 160 is two, each torsion spring 160 is sleeved outside one hinge portion 133, one end of each torsion spring 160 abuts against the distal knuckle portion 131, the other end of each torsion spring 160 abuts against the middle knuckle sleeve 120, and the torsion springs 160 can apply elastic force to the distal knuckle portions 131, so that the distal knuckle portions 131 have a tendency of rotating towards a straightening direction. The two torsion springs 160 work together to ensure that the torsion spring 160 can apply sufficient spring force to the distal knuckle 131 to return the distal knuckle 131 to straight when the disabled person straightens the middle finger.

In the bionic finger prosthesis 100 provided by the embodiment of the present invention, one end of the middle knuckle sleeve 120 is hinged to the near knuckle sleeve 110, the other end is hinged to the far knuckle prosthesis 130, one end of the linkage rope 140 is connected to the back of the near knuckle sleeve 110, the other end passes through the middle knuckle sleeve 120 and is connected to the far knuckle prosthesis 130, the near knuckle sleeve 110 is configured to be sleeved outside the near knuckle of the disabled person, the middle knuckle sleeve 120 is configured to be sleeved outside the middle knuckle of the disabled person, and the middle knuckle sleeve 120 can rotate relative to the near knuckle sleeve 110 when the middle knuckle is bent, so that the linkage rope 140 pulls the far knuckle prosthesis 130 to rotate relative to the middle knuckle sleeve 120. Compared with the prior art, the bionic finger prosthesis 100 provided by the invention adopts the linkage rope 140 connected between the near knuckle sleeve 110 and the far knuckle prosthesis 130, so that the bending function of the finger joint can be realized, the grabbing action is convenient, the flexibility is good, the wearing process is simple, the wearing efficiency is high, and the user experience is good.

Second embodiment

Referring to fig. 8, 9, 10, 11 and 12, the present embodiment provides a bionic finger prosthesis 100, which is different from the first embodiment in the shape and structure of the proximal knuckle sleeve 110, the middle knuckle sleeve 120 and the distal knuckle prosthesis 130.

In this embodiment, the proximal knuckle sleeve 110 includes a first elastic band 112 and a first skeleton 113. First elastic webbing 112 is connected with first skeleton 113, and first skeleton 113 is articulated with middle knuckle cover 120 through spacing 150, and middle knuckle cover 120 can rotate for first skeleton 113. The first elastic band is used for binding the first framework 113 outside the proximal knuckle so as to fix the relative position of the first framework 113 and the proximal knuckle of the disabled person and prevent the proximal knuckle sleeve 110 from being separated from the proximal knuckle of the disabled person.

The middle knuckle guard 120 includes a second elastic band 124 and a second backbone 125. The second elastic band 124 is connected to the second frame 125, one end of the second frame 125 is hinged to the proximal knuckle sleeve 110 through the limiting frame 150, the other end is hinged to the distal knuckle prosthesis 130, the second frame 125 can rotate relative to the first frame 113, and the distal knuckle prosthesis 130 can rotate relative to the second frame 125. The second elastic band is used to bind the second frame 125 outside the middle knuckle to fix the relative position of the second frame 125 and the middle knuckle of the disabled person, preventing the middle knuckle sleeve 120 from being detached from the middle knuckle of the disabled person. Specifically, the through hole 122 is opened on the second frame 125, and the linking rope 140 passes through the through hole 122 and is connected to the connecting portion 132 of the distal knuckle prosthesis 130, so as to drive the distal knuckle prosthesis 130 to rotate relative to the second frame 125.

In this embodiment, one end of the second elastic band 124 is connected to the second frame 125, and the other end is connected to the limiting frame 150, so as to fix the positions of the second frame 125 and the limiting frame 150 at the same time, thereby preventing the situation of dislocation and deviation of the limiting frame 150.

It should be noted that the proximal knuckle sleeve 110 and the middle knuckle sleeve 120 are both fixed on the hand of the disabled by elastic binding, so as to improve the universality of the bionic finger prosthesis 100 and reduce the production cost, and the elastic binding is stable, reliable, not easy to loosen, high in comfort level and good in user experience.

In this embodiment, the hinge 133 of the distal knuckle prosthesis 130 includes a first hinge block 134, a second hinge block 135 and a hinge shaft 136. The first hinge block 134 and the second hinge block 135 are disposed in parallel and spaced apart, and are both fixedly connected to the distal knuckle 131, the hinge shaft 136 passes through the first hinge block 134 and the second hinge block 135 and extends into the middle knuckle sleeve 120, and the hinge shaft 136 can rotate relative to the middle knuckle sleeve 120, so that the distal knuckle prosthesis 130 can rotate relative to the middle knuckle sleeve 120. The torsion spring 160 is sleeved outside the hinge shaft 136 and is disposed between the first hinge block 134 and the second hinge block 135, one end of the torsion spring 160 abuts against the distal knuckle portion 131, and the other end abuts against the middle knuckle sleeve 120, and the torsion spring 160 can apply an elastic force to the distal knuckle portion 131 when the disabled person straightens the middle finger, so that the distal knuckle portion 131 is reset and straightened, and the distal knuckle prosthesis 130 is reset and straightened.

In this embodiment, two positioning holes 126 are oppositely formed in the top of the middle knuckle sleeve 120, one end of the hinge shaft 136 extends into one positioning hole 126, the other end of the hinge shaft 136 extends into the other positioning hole 126, the hinge shaft 136 can simultaneously rotate relative to the two positioning holes 126, and the positioning holes 126 can limit the position of the hinge shaft 136, so as to realize the rotation function of the distal knuckle prosthesis 130 relative to the middle knuckle sleeve 120.

In this embodiment, the distal knuckle prosthesis 130 is in a skeleton shape, so as to facilitate size adjustment, improve universality, and expand application range.

Notably, the biomimetic finger prosthesis 100 also includes a biomimetic muscle layer 170 and an artificial skin 180. The bionic muscle layer 170 is sleeved outside the distal knuckle prosthesis 130, and the artificial skin 180 is sleeved outside the bionic muscle layer 170, so that the installation and maintenance are facilitated, and the bionic effect is improved. Therefore, the bionic finger prosthesis 100 not only can realize the bending function of the finger joint and has good flexibility, but also has good simulation effect because the outer surface is covered with the artificial skin 180, so that the bionic finger prosthesis 100 has the appearance and the skin lines of a real finger.

In this embodiment, the bionic muscle layer 170 is made of a silicon rubber material, but the invention is not limited thereto, and in other embodiments, the bionic muscle layer 170 may be made of a rubber material, and the material of the bionic muscle layer 170 is not particularly limited.

The bionic finger prosthesis 100 provided by the embodiment of the invention has the same beneficial effects as the first embodiment, and is not described herein again.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a bionical finger artificial limb, is applied to the disabled person of dactylotheca far away of disappearance, its characterized in that, bionical finger artificial limb includes nearly dactylotheca, well dactylotheca, far dactylotheca and linkage rope, the one end of well dactylotheca with nearly dactylotheca is articulated, the other end with far dactylotheca is articulated, the one end of linkage rope connect in the back of nearly dactylotheca, the other end passes well dactylotheca, and with far dactylotheca is connected, near dactylotheca cover is used for the cover to locate the disabled person's near dactylotheca outside, well dactylotheca cover is located the cover outside the middle dactylotheca of disabled person, well dactylotheca cover can be in the bending relative to near dactylotheca cover rotates during the middle dactylotheca, so that the linkage rope pulls far dactylotheca artificial limb for well dactylotheca rotates.

2. The biomimetic finger prosthesis of claim 1, further comprising a stop, the proximal knuckle sleeve being hinged to the middle knuckle sleeve via the stop.

3. The bionic finger prosthesis of claim 2, wherein the limiting frame comprises a frame body, a first hinge member and a second hinge member, the first hinge member and the second hinge member are arranged in parallel at intervals and are both mounted on the frame body, the near knuckle sleeve is provided with a first hinge hole, the first hinge member is rotatably arranged in the first hinge hole, the middle knuckle sleeve is provided with a second hinge hole, and the second hinge member is rotatably arranged in the second hinge hole.

4. The bionic finger prosthesis of claim 2, wherein a lead hole is opened on the back of the limiting frame, the linkage rope is disposed through the lead hole, and the lead hole is used for limiting and guiding the linkage rope.

5. The bionic finger prosthesis of claim 4, wherein the number of the lead holes is two, and the two lead holes are coaxially arranged at intervals and oppositely arranged at two sides of the limit frame.

6. The biomimetic finger prosthesis according to claim 1, wherein the proximal knuckle sleeve includes a first elastic band and a first skeleton, the first elastic band is connected with the first skeleton, the first skeleton is hinged with the middle knuckle sleeve, and the first elastic band is used for binding the first skeleton outside the proximal knuckle.

7. The biomimetic finger prosthesis according to claim 1, wherein the middle knuckle sleeve includes a second elastic band and a second skeleton, the second elastic band is connected with the second skeleton, one end of the second skeleton is hinged with the near knuckle sleeve, the other end is hinged with the far knuckle prosthesis, and the second elastic band is used for binding the second skeleton outside the middle knuckle.

8. The biomimetic finger prosthesis according to claim 7, wherein the second frame is formed with a through hole, and the linkage cord passes through the through hole and is connected to the distal knuckle prosthesis.

9. The biomimetic finger prosthesis of claim 1, wherein the distal knuckle prosthesis comprises a distal knuckle portion, a connecting portion and a hinged portion, the connecting portion and the hinged portion both being fixedly connected to the distal knuckle portion, the connecting portion being connected to the linkage cord, the hinged portion being hinged to the middle knuckle sleeve.

10. The biomimetic finger prosthesis according to claim 9, wherein the hinge portion includes a first hinge block, a second hinge block and a hinge shaft, the first hinge block and the second hinge block are spaced apart in parallel and are both fixedly connected to the distal knuckle portion, and the hinge shaft passes through the first hinge block and the second hinge block and is capable of rotating relative to the middle knuckle sleeve.

11. The bionic finger prosthesis of claim 10, further comprising a torsion spring sleeved outside the hinge shaft and disposed between the first hinge block and the second hinge block, wherein one end of the torsion spring abuts against the distal knuckle portion and the other end abuts against the middle knuckle sleeve.

12. The biomimetic finger prosthesis of claim 1, further comprising a biomimetic muscle layer and an artificial skin, the biomimetic muscle layer being sleeved outside the distal knuckle prosthesis, the artificial skin being sleeved outside the biomimetic muscle layer.