A finger prosthesis

Abstract

The application discloses a finger prosthesis and relates to the technical field of prostheses. The finger prosthesis comprises a fixing frame, a proximal phalanx sleeve, a traction rope, a sliding block, a first transmission member, a second transmission member, a middle phalanx prosthesis and a distal phalanx prosthesis. The fixing frame is connected with the sliding block through the traction rope, the sliding block is slidably arranged on the proximal phalanx sleeve, one end of the middle phalanx prosthesis is hingedly connected with the proximal phalanx sleeve, the other end of the middle phalanx prosthesis is hingedly connected with the distal phalanx prosthesis, the sliding block is rotationally matched with the middle phalanx prosthesis through the first transmission member, the middle phalanx prosthesis is rotationally matched with the distal phalanx prosthesis through the second transmission member, the proximal phalanx sleeve can rotate relative to the fixing frame when a disabled person bends the proximal phalanx, so as to pull the sliding block to slide through the traction rope, thereby driving the middle phalanx prosthesis to rotate through the first transmission member, and further driving the distal phalanx prosthesis to rotate through the second transmission member. The finger prosthesis provided by the application can realize flexible rotation, meets the daily life needs of the disabled person, has a simple structure, low production cost and wide application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of artificial limbs, in particular to a finger artificial limb. BACKGROUND

[0002] At present, in order to ensure the daily activities of the disabled who lose part of the finger joints, a finger artificial limb is generally installed on the hand of the disabled. The finger artificial limb now is divided into two kinds, one is fixed type, and the other is chip control type. The fixed type finger artificial limb cannot rotate and has poor flexibility, and the chip control type finger artificial limb has complex structure, high production cost and high price, and cannot be popularized in the society.

[0003] Therefore, it is particularly important to design and manufacture a finger artificial limb with simple structure and good flexibility in the production of artificial limbs. SUMMARY

[0004] The present application aims to provide a finger artificial limb which can rotate flexibly, meet the needs of daily life of the disabled, has simple structure, low production cost and wide application range.

[0005] The present application is implemented by using the following technical solutions.

[0006] A finger artificial limb applied to the disabled with remaining proximal phalangeal joints, the finger artificial limb comprising a fixing frame, a proximal phalangeal sleeve, a traction rope, a sliding block, a first transmission member, a second transmission member, a middle phalangeal artificial limb and a distal phalangeal artificial limb, the fixing frame being connected with the sliding block through the traction rope, the sliding block being slidably arranged on the proximal phalangeal sleeve, one end of the middle phalangeal artificial limb being hingedly connected with the proximal phalangeal sleeve and the other end being hingedly connected with the distal phalangeal artificial limb, the sliding block being rotationally matched with the middle phalangeal artificial limb through the first transmission member, the middle phalangeal artificial limb being rotationally matched with the distal phalangeal artificial limb through the second transmission member, the fixing frame being used for being installed on the back of the hand of the disabled, the proximal phalangeal sleeve being used for being sleeved on the proximal phalangeal joint, the proximal phalangeal sleeve being capable of rotating relative to the fixing frame when the proximal phalangeal joint of the disabled is bent, so as to pull the sliding block to slide through the traction rope, thereby driving the middle phalangeal artificial limb to rotate through the first transmission member, and further driving the distal phalangeal artificial limb to rotate through the second transmission member.

[0007] Optionally, the first transmission member is a first gear, the first gear is rotationally arranged on the proximal phalangeal sleeve, the sliding block is provided with a rack portion, the middle phalangeal artificial limb is provided with a first tooth portion, the rack portion is matched with the first gear, and the first gear is meshed with the first tooth portion.

[0008] Optionally, the sliding block is provided with a guide sliding column, and the proximal phalangeal sleeve is provided with a sliding groove, the guide sliding column being slidably arranged in the sliding groove.

[0009] Optionally, a guide groove is formed in the guide sliding column along the axial direction thereof, and the traction rope is arranged in the guide groove and connected to the bottom wall of the guide groove.

[0010] Optionally, the finger prosthesis further comprises a reset spring, the proximal phalanx sleeve is provided with a limiting slot, a baffle is arranged at one end of the limiting slot away from the middle phalanx prosthesis, the reset spring is arranged in the limiting slot, the extension direction of the reset spring is the same as the extension direction of the limiting slot, one end of the reset spring abuts against the sliding block, and the other end abuts against the baffle.

[0011] Optionally, the sliding block is provided with a pull line block, the pull line block is provided with a threading hole, the traction rope is arranged through the threading hole and connected with the pull line block.

[0012] Optionally, the second transmission member comprises a second gear, a third gear and a linkage shaft, the proximal phalanx sleeve is provided with a second tooth part, the distal phalanx prosthesis is provided with a third tooth part, the second gear and the third gear are coaxially and spaced apart, and are fixedly connected with the linkage shaft, the linkage shaft is rotatably arranged in the middle phalanx prosthesis, the second tooth part is matched with the second gear, and the third gear is matched with the third tooth part.

[0013] Optionally, the second transmission member further comprises a transmission gear, the transmission gear is rotatably arranged in the middle phalanx prosthesis, the third gear is meshed with the transmission gear, and the transmission gear is meshed with the third tooth part.

[0014] Optionally, the middle phalanx prosthesis is relatively provided with a first limiting plate and a second limiting plate, the third gear, the transmission gear and the third tooth part are arranged between the first limiting plate and the second limiting plate.

[0015] Optionally, the finger prosthesis further comprises a bracelet and a fixing strip, one end of the fixing strip is connected with the bracelet, the other end is connected with the fixing frame, and the bracelet is used for being sleeved on the wrist of the disabled person.

[0016] The finger prosthesis has the following beneficial effects:

[0017] The finger prosthesis is characterized in that the fixing frame is connected with the sliding block through the traction rope, the sliding block is slidably arranged on the proximal phalanx sleeve, one end of the middle phalanx prosthesis is hingedly connected with the proximal phalanx sleeve, the other end is hingedly connected with the distal phalanx prosthesis, the sliding block is rotationally matched with the middle phalanx prosthesis through the first transmission member, the middle phalanx prosthesis is rotationally matched with the distal phalanx prosthesis through the second transmission member, the fixing frame is used for being mounted on the back of the hand of the disabled person, the proximal phalanx sleeve is used for being sleeved on the proximal phalanx, and the proximal phalanx sleeve can rotate relative to the fixing frame when the proximal phalanx of the disabled person is bent, so as to pull the sliding block to slide through the traction rope, drive the middle phalanx prosthesis to rotate through the first transmission member, and then drive the distal phalanx prosthesis to rotate through the second transmission member. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The structure diagram of the finger prosthesis provided by the first embodiment of the present application when the proximal phalanx of the disabled person is straightened;

[0020] Figure 2 The structure diagram of the finger prosthesis provided by the first embodiment of the present application when the proximal phalanx of the disabled person is bent;

[0021] Figure 3 The explosion view of the finger prosthesis provided by the first embodiment of the present application from one perspective;

[0022] Figure 4 The explosion view of the finger prosthesis provided by the first embodiment of the present application from another perspective;

[0023] Figure 5 The structure diagram of the proximal phalanx sleeve in the finger prosthesis provided by the first embodiment of the present application;

[0024] Figure 6 The structure diagram of the sliding block in the finger prosthesis provided by the first embodiment of the present application;

[0025] Figure 7 The structure diagram of the second transmission member in the finger prosthesis provided by the first embodiment of the present application;

[0026] Figure 8 The structure diagram of the middle phalanx prosthesis in the finger prosthesis provided by the first embodiment of the present application;

[0027] Figure 9 The structure diagram of the middle phalanx prosthesis in the finger prosthesis provided by the first embodiment of the present application; Figure 7 The explosion view of the middle linkage shaft cooperating with the third gear;

[0028] Figure 10 The structure diagram of the sliding block in the finger prosthesis provided by the second embodiment of the present application;

[0029] Icon: 100-finger prosthesis; 110-fixing frame; 120-near phalangeal sleeve; 121-slotted; 122-limiting slot; 123-baffle; 124-second tooth part; 130-pulling rope; 140-sliding block; 141-rack part; 142-guiding sliding column; 143-limiting column; 144-pull line block; 145-threading hole; 146-guiding slot; 150-first transmission part; 151-first gear; 160-second transmission part; 161-second gear; 162-third gear; 163-linkage shaft; 164-transmission gear; 165-transmission section; 166-stop face; 167-transmission slot; 170-middle phalangeal prosthesis; 171-first tooth part; 172-first limiting plate; 173-second limiting plate; 174-limiting cavity; 180-far phalangeal prosthesis; 181-third tooth part; 190-resetting spring; 200-hand ring; 210-fixing strip. DETAILED DESCRIPTION

[0030] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0032] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present application, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "connected", "mounted", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0036] First embodiment

[0037] Please refer to Figure 1 , Figure 2 and Figure 3 , the present application provides a finger prosthesis 100 for assisting the disabled in daily activities. It can realize flexible rotation, meet the needs of the disabled in daily life, has simple structure, low production cost and wide application range.

[0038] It should be noted that the finger prosthesis 100 is applied to the disabled with residual proximal phalanges. If the disabled have residual proximal phalanges and missing middle phalanges and distal phalanges, the finger prosthesis 100 can be installed on the hand of the disabled to replace the middle phalanges and the distal phalanges. In this embodiment, the finger prosthesis 100 is used as the index finger of the disabled, but it is not limited to this. The finger prosthesis 100 can be used as the middle finger of the disabled, and can also be used as the ring finger of the disabled. The application position of the finger prosthesis 100 is not specifically limited.

[0039] The finger prosthesis 100 comprises a fixing frame 110, a proximal phalanx sleeve 120, a traction rope 130, a sliding block 140, a first transmission member 150, a second transmission member 160, a middle phalanx prosthesis 170, a distal phalanx prosthesis 180, a reset spring 190, a hand ring 200 and a fixing strip 210. The fixing frame 110 is connected with the sliding block 140 through the traction rope 130, the sliding block 140 is slidably arranged on the proximal phalanx sleeve 120, and the fixing frame 110 can pull the sliding block 140 to slide relative to the proximal phalanx sleeve 120 through the traction rope 130. One end of the middle phalanx prosthesis 170 is hinged with the proximal phalanx sleeve 120, and the other end is hinged with the distal phalanx prosthesis 180, the middle phalanx prosthesis 170 can rotate relative to the proximal phalanx sleeve 120, and the distal phalanx prosthesis 180 can rotate relative to the middle phalanx prosthesis 170. The sliding block 140 is rotationally matched with the middle phalanx prosthesis 170 through the first transmission member 150, and the sliding block 140 can drive the middle phalanx prosthesis 170 to rotate through the first transmission member 150 in the sliding process. The middle phalanx prosthesis 170 is rotationally matched with the distal phalanx prosthesis 180 through the second transmission member 160, and the middle phalanx prosthesis 170 can drive the distal phalanx prosthesis 180 to rotate through the second transmission member 160 in the rotating process.

[0040] Specifically, the fixing frame 110 is used to be installed on the back of the hand of the disabled person, and the proximal phalanx sleeve 120 is used to be sleeved on the proximal phalanx. The proximal phalanx sleeve 120 can rotate relative to the fixing frame 110 when the disabled person bends the proximal phalanx, so as to pull the sliding block 140 to slide through the traction rope 130, thereby driving the middle phalanx prosthesis 170 to rotate through the first transmission member 150, and further driving the distal phalanx prosthesis 180 to rotate through the second transmission member 160. In this way, while the disabled person bends the proximal phalanx, the middle phalanx prosthesis 170 rotates relative to the proximal phalanx sleeve 120, and the distal phalanx prosthesis 180 rotates relative to the middle phalanx prosthesis 170, and the rotating process is flexible, so as to realize the bending function of the finger, meet the needs of the daily life of the disabled person, and the finger prosthesis 100 is driven by the mechanical transmission, has simple structure, low production cost and wide application range.

[0041] It should be noted that the reset spring 190 is installed on the proximal phalanx sleeve 120 and connected with the sliding block 140, and the reset spring 190 is used to drive the sliding block 140 to slide relative to the proximal phalanx sleeve 120 when the disabled person straightens the proximal phalanx. Further, one end of the fixing strip 210 is connected with the hand ring 200, and the other end is connected with the fixing frame 110, the hand ring 200 is used to be sleeved on the wrist of the disabled person, and the hand ring 200 can fix the position of the fixing frame 110 through the fixing strip 210, so that the fixing frame 110 closely fits on the back of the hand of the disabled person, and the displacement of the fixing frame 110 relative to the back of the hand of the disabled person is prevented.

[0042] Please refer to Figure 4 , Figure 5 and Figure 6, it is worth noting that the first transmission member 150 is a first gear 151, the first gear 151 is rotatably arranged on the proximal phalange sleeve 120, and the first gear 151 can rotate relative to the proximal phalange sleeve 120. The slider 140 is provided with a rack portion 141, the middle phalange prosthesis 170 is provided with a first tooth portion 171, the rack portion 141 cooperates with the first gear 151, and the first gear 151 meshes with the first tooth portion 171. Specifically, when the disabled person bends the proximal phalange, the traction rope 130 pulls the slider 140 to slide relative to the proximal phalange sleeve 120, the slider 140 drives the first gear 151 to rotate through the cooperation of the rack portion 141 and the first gear 151, and the first gear 151 drives the middle phalange prosthesis 170 to rotate through the meshing of the first gear 151 and the first tooth portion 171.

[0043] In the embodiment, the slider 140 is provided with a guide sliding column 142, the proximal phalange sleeve 120 is provided with a sliding groove 121, the guide sliding column 142 is slidingly arranged in the sliding groove 121, the guide sliding column 142 can slide relative to the proximal phalange sleeve 120 along the extension direction of the sliding groove 121, and the sliding groove 121 can limit the guide sliding column 142 to ensure that the sliding process of the slider 140 is stable and reliable.

[0044] Further, the proximal phalange sleeve 120 is provided with a limiting groove 122, the limiting groove 122 is arranged in parallel and spaced apart from the sliding groove 121, the extension direction of the limiting groove 122 is the same as the extension direction of the sliding groove 121. The limiting groove 122 is provided with a baffle 123 at an end away from the middle phalange prosthesis 170, a return spring 190 is arranged in the limiting groove 122, the extension direction of the return spring 190 is the same as the extension direction of the limiting groove 122, one end of the return spring 190 abuts against the slider 140, and the other end abuts against the baffle 123. The return spring 190 is used to apply a spring force to the slider 140 to reset the slider 140.

[0045] Specifically, the return spring 190 is always in a compressed state, when the disabled person bends the proximal phalange, the traction rope 130 pulls the slider 140 to slide relative to the proximal phalange sleeve 120 against the spring force of the return spring 190, thereby synchronously driving the middle phalange prosthesis 170 and the distal phalange prosthesis 180 to rotate, at this time the return spring 190 is deformed under pressure; when the disabled person straightens the proximal phalange, the traction rope 130 no longer applies a pulling force to the slider 140, the slider 140 slides back relative to the proximal phalange sleeve 120 under the action of the spring force of the return spring 190, thereby synchronously driving the middle phalange prosthesis 170 and the distal phalange prosthesis 180 to rotate back to reset.

[0046] In the embodiment, the sliding block 140 is provided with a limiting column 143, the limiting column 143 is arranged in the limiting groove 122, and the axial direction of the limiting column 143 is the same as the extending direction of the limiting groove 122. The return spring 190 is sleeved outside the limiting column 143, and the limiting column 143 is used for limiting the return spring 190, so as to ensure that the return spring 190 extends and retracts along the extending direction of the limiting groove 122, and prevent the return spring 190 from being inclined or bent, thereby ensuring that the return process is stable and reliable.

[0047] In the embodiment, the sliding block 140 is provided with a pull wire block 144, the pull wire block 144 is provided with a threading hole 145, the traction rope 130 passes through the threading hole 145 and is connected with the pull wire block 144, and the threading hole 145 can limit and guide the traction rope 130, so as to limit the position at which the traction rope 130 applies a pulling force to the pull wire block 144, so that the included angle between the pulling force applied to the sliding block 140 and the sliding direction of the sliding block 140 is always less than a preset value, thereby ensuring that the sliding process of the sliding block 140 is stable and reliable.

[0048] Please refer to Figure 4 and Figure 7 , the second transmission member 160 comprises a second gear 161, a third gear 162, a linkage shaft 163 and a transmission gear 164. The proximal phalanx sleeve 120 is provided with a second tooth portion 124, the distal phalanx prosthesis 180 is provided with a third tooth portion 181, the second gear 161 and the third gear 162 are coaxially and spaced apart, and are both fixedly connected with the linkage shaft 163, the linkage shaft 163 is rotatably installed in the middle phalanx prosthesis 170, the second tooth portion 124 is matched with the second gear 161, and the third gear 162 is matched with the third tooth portion 181. Specifically, when the disabled person bends the proximal phalanx, the sliding block 140 drives the middle phalanx prosthesis 170 to rotate relative to the proximal phalanx sleeve 120 through the first gear 151, so that the second tooth portion 124 drives the second gear 161 to rotate, the second gear 161 drives the third gear 162 to rotate through the linkage shaft 163, and the third gear 162 drives the distal phalanx prosthesis 180 to rotate through the matching of the third gear 162 and the third tooth portion 181, thereby realizing the synchronous rotation of the middle phalanx prosthesis 170 and the distal phalanx prosthesis 180.

[0049] Specifically, the transmission gear 164 is rotatably installed in the middle phalanx prosthesis 170 and is arranged between the third gear 162 and the third tooth portion 181. The third gear 162 is engaged with the transmission gear 164, the transmission gear 164 is engaged with the third tooth portion 181, and the third gear 162 drives the third tooth portion 181 to rotate through the transmission gear 164, thereby driving the distal phalanx prosthesis 180 to rotate relative to the middle phalanx prosthesis 170.

[0050] In the embodiment, the first gear 151 is arranged opposite to the second tooth part 124 on both sides of the proximal phalangeal sleeve 120, the first gear 151 can rotate relative to the proximal phalangeal sleeve 120, and the second tooth part 124 is integrally formed with the proximal phalangeal sleeve 120; the second gear 161 and the first tooth part 171 are arranged opposite to each other on both sides of the middle phalangeal prosthesis 170, the second gear 161 can rotate relative to the middle phalangeal prosthesis 170, and the first tooth part 171 is integrally formed with the middle phalangeal prosthesis 170; in this way, the slider 140 can drive the middle phalangeal prosthesis 170 to rotate relative to the proximal phalangeal sleeve 120 through the cooperation of the first gear 151 and the first tooth part 171, and when the middle phalangeal prosthesis 170 rotates relative to the proximal phalangeal sleeve 120, the linkage shaft 163 and the third gear 162 are driven to rotate through the cooperation of the second tooth part 124 and the second gear 161, so that the distal phalangeal prosthesis 180 is driven to rotate relative to the middle phalangeal prosthesis 170 through the cooperation of the third gear 162 and the third tooth part 181. The whole structure is compact and ingenious, the transmission is stable and reliable, and the synchronous rotation of the middle phalangeal prosthesis 170 and the distal phalangeal prosthesis 180 can be flexibly realized.

[0051] Please refer to Figure 8 It should be noted that the middle phalangeal prosthesis 170 is arranged opposite to the first limiting plate 172 and the second limiting plate 173, the limiting cavity 174 is formed between the first limiting plate 172 and the second limiting plate 173, the third gear 162, the transmission gear 164 and the third tooth part 181 are arranged in the limiting cavity 174 between the first limiting plate 172 and the second limiting plate 173, and the linkage shaft 163 passes through the first limiting plate 172 and the second limiting plate 173 and is arranged, the linkage shaft 163 can rotate relative to the first limiting plate 172 and the second limiting plate 173. The first limiting plate 172 and the second limiting plate 173 jointly act to limit the third gear 162, the transmission gear 164 and the third tooth part 181, prevent the lateral sliding between the third gear 162, the transmission gear 164 and the third tooth part 181, and ensure that the gear transmission process is stable and reliable.

[0052] Please refer to Figure 9 In the embodiment, the linkage shaft 163 has a transmission section 165, the transmission section 165 is provided with a stop surface 166, the third gear 162 is provided with a transmission groove 167, the transmission section 165 passes through the transmission groove 167 and is arranged, and the stop surface 166 is arranged in close contact with the inner wall of the transmission groove 167. The inner wall of the transmission groove 167 can stop and limit the stop surface 166 to prevent the third gear 162 from rotating relative to the transmission section 165, so as to ensure that the linkage shaft 163 and the third gear 162 rotate synchronously. Further, the second gear 161 is integrally formed with the linkage shaft 163 and arranged at one end of the linkage shaft 163, so as to ensure that the second gear 161 and the linkage shaft 163 rotate synchronously.

[0053] The finger prosthesis 100 provided by the embodiment of the present application, the fixing frame 110 is connected with the sliding block 140 through the traction rope 130, the sliding block 140 is slidably arranged on the proximal phalanx sleeve 120, one end of the middle phalanx prosthesis 170 is hinged with the proximal phalanx sleeve 120, the other end is hinged with the distal phalanx prosthesis 180, the sliding block 140 is rotationally matched with the middle phalanx prosthesis 170 through the first transmission member 150, the middle phalanx prosthesis 170 is rotationally matched with the distal phalanx prosthesis 180 through the second transmission member 160, the fixing frame 110 is used for being mounted on the back of the hand of the disabled person, the proximal phalanx sleeve 120 is used for being sleeved on the proximal phalanx, the proximal phalanx sleeve 120 can rotate relative to the fixing frame 110 when the disabled person bends the proximal phalanx, so as to pull the sliding block 140 to slide through the traction rope 130, thereby driving the middle phalanx prosthesis 170 to rotate through the first transmission member 150, and further driving the distal phalanx prosthesis 180 to rotate through the second transmission member 160. Compared with the prior art, the finger prosthesis 100 provided by the present application can realize flexible rotation, meet the needs of the disabled person in daily life, has simple structure, low production cost and wide application range, because the middle phalanx prosthesis 170 rotationally matched with the distal phalanx prosthesis 180 through the second transmission member 160 and the sliding block 140 rotationally matched with the middle phalanx prosthesis 170 through the first transmission member 150 are adopted.

[0054] Second embodiment

[0055] Please refer to Figure 10 The embodiment of the present application provides a finger prosthesis 100, compared with the first embodiment, the difference of the embodiment is that the structure of the sliding block 140 is different.

[0056] In the embodiment, the sliding block 140 is no longer provided with the pull line block 144, and the traction rope 130 is no longer connected with the pull line block 144. Specifically, the guide sliding column 142 of the sliding block 140 is provided with a guide groove 146 along the axial direction thereof, the traction rope 130 extends into the guide groove 146 and is connected to the bottom wall of the guide groove 146, and the fixing frame 110 can apply a pulling force to the bottom wall of the guide groove 146 through the traction rope 130 to pull the guide sliding column 142 to move, thereby driving the entire sliding block 140 to slide relative to the proximal phalanx sleeve 120.

[0057] It should be noted that since the traction rope 130 is partially located in the guide groove 146, and the length direction of the traction rope 130 located in the guide groove 146 is always in the same direction as the axial direction of the guide sliding column 142, therefore, during the process of bending the proximal phalanx by the disabled person, no matter the size of the bending angle, the direction of the pulling force applied by the traction rope 130 to the bottom wall of the guide groove 146 always remains the axial direction of the guide sliding column 142, that is, the sliding direction of the sliding block 140, in this way, the direction of the pulling force on the sliding block 140 and the sliding direction of the sliding block 140 are in the same direction, which can improve the sliding efficiency of the sliding block 140, achieve the effect of saving labor, and ensure the stability and reliability of the sliding process.

[0058] The finger prosthesis 100 provided by the embodiment of the present application has the same beneficial effects as the first embodiment, and thus will not be described herein again.

[0059] The above merely provides preferred embodiments of the present application but not for limiting the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall fall into the scope of protection of the present application.

Claims

1. A finger prosthesis for a person with a residual proximal phalanx, characterized in that The finger prosthesis comprises a fixing frame (110), a proximal phalanx sleeve (120), a traction rope (130), a sliding block (140), a first transmission member (150), a second transmission member (160), a middle phalanx prosthesis (170) and a distal phalanx prosthesis (180), the fixing frame (110) is connected with the sliding block (140) through the traction rope (130), the sliding block (140) is slidably arranged on the proximal phalanx sleeve (120), one end of the middle phalanx prosthesis (170) is hingedly connected with the proximal phalanx sleeve (120), and the other end is hingedly connected with the distal phalanx prosthesis (180), the sliding block (140) is rotationally matched with the middle phalanx prosthesis (170) through the first transmission member (150), the middle phalanx prosthesis (170) is rotationally matched with the distal phalanx prosthesis (180) through the second transmission member (160), the fixing frame (110) is used for being mounted on the back of a hand of a disabled person, the proximal phalanx sleeve (120) is used for being sleeved on the proximal phalanx, and the proximal phalanx sleeve (120) can rotate relative to the fixing frame (110) when the proximal phalanx is bent by the disabled person, so as to pull the sliding block (140) to slide through the traction rope (130), and then drive the middle phalanx prosthesis (170) to rotate through the first transmission member (150), and further drive the distal phalanx prosthesis (180) to rotate through the second transmission member (160); The first transmission member (150) is a first gear (151), the first gear (151) is rotationally arranged on the proximal phalanx sleeve (120), the sliding block (140) is provided with a rack portion (141), the middle phalanx prosthesis (170) is provided with a first tooth portion (171), the rack portion (141) is matched with the first gear (151), and the first gear (151) is meshed with the first tooth portion (171); The sliding block (140) is provided with a guide sliding column (142), the proximal phalanx sleeve (120) is provided with a sliding groove (121), and the guide sliding column (142) is slidably arranged in the sliding groove (121); The finger prosthesis further comprises a reset spring (190), the proximal phalanx sleeve (120) is provided with a limiting groove (122), one end of the limiting groove (122) away from the middle phalanx prosthesis (170) is provided with a baffle (123), the reset spring (190) is arranged in the limiting groove (122), the extension direction of the reset spring (190) is the same as the extension direction of the limiting groove (122), one end of the reset spring (190) abuts against the sliding block (140), and the other end abuts against the baffle (123). The second transmission member (160) comprises a second gear (161), a third gear (162) and a linkage shaft (163), the proximal phalanx sleeve (120) is provided with a second tooth portion (124), the distal phalanx prosthesis (180) is provided with a third tooth portion (181), the second gear (161) and the third gear (162) are coaxially and spaced apart, and are fixedly connected with the linkage shaft (163), the linkage shaft (163) is rotatably installed in the middle phalanx prosthesis (170), the second tooth portion (124) is matched with the second gear (161), and the third gear (162) is matched with the third tooth portion (181).

2. The finger prosthesis according to claim 1, characterized in that The guide sliding column (142) is provided with a guide groove (146) along an axial direction, and the traction rope (130) is arranged in the guide groove (146) and connected to a bottom wall of the guide groove (146).

3. The finger prosthesis according to claim 1, characterized in that The sliding block (140) is provided with a pull line block (144), the pull line block (144) is provided with a threading hole (145), the traction rope (130) is arranged in the threading hole (145) and connected to the pull line block (144).

4. The finger prosthesis of claim 1, wherein The second transmission member (160) further comprises a transmission gear (164), the transmission gear (164) is rotatably installed in the middle phalanx prosthesis (170), the third gear (162) is engaged with the transmission gear (164), and the transmission gear (164) is engaged with the third tooth portion (181).

5. The finger prosthesis according to claim 4, characterized in that The middle phalanx prosthesis (170) is relatively provided with a first limiting plate (172) and a second limiting plate (173), and the third gear (162), the transmission gear (164) and the third tooth portion (181) are arranged between the first limiting plate (172) and the second limiting plate (173).

6. The finger prosthesis of claim 1, wherein The finger prosthesis further comprises a hand ring (200) and a fixing strip (210), one end of the fixing strip (210) is connected with the hand ring (200), the other end is connected with the fixing frame (110), and the hand ring (200) is used for being sleeved on a wrist of a disabled person.

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