Non-powered finger prosthethis

Abstract

The present invention relates to a non-powered finger prosthesis and, more specifically, to a non-powered finger prosthesis which performs the function of a joint by being used on a finger in which the PIP joint has been severed, and which is easily assembled. Accordingly, the finger prosthesis can perform the function of a joint by being used on a finger in which the PIP joint has been severed, thereby assisting such that daily life or work activities can be smoothly performed, and the prosthesis is easy to mount on fingers of various sizes that have been severed, can be manufactured at low costs, and can be conveniently used due to being easily assembled and separated.

Description

Non-powered finger prosthetic hand

[0001] The present invention relates to a non-powered finger prosthesis, and more particularly, to a non-powered finger prosthesis that is used on a finger amputated up to the proximal interphalangeal joint, performs the function of the joint, and is easy to assemble.

[0002]

[0003] Generally, prosthetics are attached to the amputated part and are classified as decorative, active, and working prosthetics. Decorative prosthetics have a shape similar to the amputated finger, but cannot move or perform joint movements. Active prosthetics can move by transferring the movement of the shoulder to the joint area, such as adduction and abduction, or the oppositional movement of the thumb and the other four fingers. In addition, working prosthetics are designed for efficiency rather than appearance. For example, the hook-shaped fingertips can grasp, hold, or pull objects.

[0004] Meanwhile, electronic prosthetics that replace the hands of amputees use motors to implement joint movement, or strings, depending on the type. When implementing joint movement using motors, a significant amount of power is required because a motor is installed for each joint, and the electronic prosthetic hand itself is heavy, which puts a strain on the wearer's physical strength, and various other problems arise. To solve this, a predetermined power value can be stored in advance in the motor, etc., and the joint movement can be increased by a predetermined amount of power to implement a predetermined gripping force after detecting the joint movement limit value. However, this has the problem that the sensor and the predetermined stored power value must be input in advance, and it is difficult to implement various gripping forces depending on the situation or target object.

[0005] There is a need to develop a universal finger assistive device that can address these issues, reduce the economic burden, and be easily purchased, used, and managed by anyone.

[0006]

[0007] The purpose of the present invention is to provide a non-powered finger prosthesis that assists in smoothly performing daily life or work activities when the amputated finger is amputated up to the proximal interphalangeal joint (PIP joint).

[0008] Another object of the present invention is to provide a non-powered finger prosthesis that is easy to manufacture and assemble and easy to attach to an amputated finger.

[0009] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned can be clearly understood by those skilled in the art from the description below.

[0010]

[0011] In order to achieve the above objects, the present invention provides a non-powered finger prosthesis including a first joint member, a second joint housing part, a third joint member, and a dorsal pivot part, the first joint member being formed of a first joint first member and a first joint second member, connected to the dorsal pivot part, and including a ring-shaped finger ring through which an amputated finger passes through the first joint first member; a second joint housing part being formed of a second joint first member and a second joint second member, and including a second joint third member and a second joint fourth member connected to the first joint member, the second joint member having a shape of an amputated fingertip joint therein; a third joint member connected to the second joint third member and the second joint fourth member, the third joint member having a shape of an amputated fingertip joint; and a dorsal pivot part connected to the first joint member at one end, including a length adjustment part capable of adjusting a length, and connected to a wrist support part at the other end.

[0012] The first segment first member may include a first segment first fastening portion on one side forming an upwardly convex curved surface, a first segment second fastening portion on an upper side of the other side forming an upwardly convex curved surface, a first segment third fastening portion on a lower side of the other side, and a finger ring including a sweat discharge ventilation hole on a lower side between the one side and the other side, and the first segment second member may include a first segment fourth fastening portion on one side forming an upwardly convex curved surface, and a first segment fifth fastening portion on the other side forming an upwardly convex curved surface, and the backhand pivot portion may include a backhand pivot first fastening portion fastened to the first segment first fastening portion on a lower side of one side, and a backhand pivot second fastening portion fastened to the first segment fourth fastening portion on an upper side of one side.

[0013] The second segment first member may include a second segment first fastening portion on one side, a second segment second fastening portion on an upper side, and a second segment third fastening portion on a lower side, the second segment second member may include a second segment fourth fastening portion on one side, a second segment fifth fastening portion on an upper side, and a second segment sixth fastening portion on a lower side, the second segment third member may include a second segment seventh fastening portion on one side that is fastened to the second segment first fastening portion, and a second segment eighth fastening portion on the other side that is fastened to the first segment third fastening portion, and the second segment fourth member may include a second segment ninth fastening portion on one side that is fastened to the second segment fourth fastening portion, a second segment tenth fastening portion on an upper side of the other side that is fastened to the first segment second fastening portion, and a second segment eleventh fastening portion on a lower side of the other side that is fastened to the first segment fifth fastening portion.

[0014] The second joint housing portion may be formed by fastening the second joint second fastening portion and the second joint fifth fastening portion, and fastening the second joint third fastening portion and the second joint sixth fastening portion.

[0015] The third joint member may include a third joint first fastening portion connected to the second joint seventh fastening portion at the upper end of one side, a third joint second fastening portion connected to the second joint ninth fastening portion at the lower end of one side, and a rubber tip at the lower end of the other side.

[0016] The second joint third member connected to the third joint first fastening portion and the second joint fourth member connected to the third joint second fastening portion may be formed in an X-shaped structure so that the third joint member is not bent in the reverse direction when the fingers are spread.

[0017] In order to allow the third joint member to bend within a range of 0° to 60° when the finger is bent, the second joint second fastening portion may be fastened to the third joint first fastening portion by penetrating the second joint seventh fastening portion, and the second joint fourth fastening portion may be fastened to the third joint second fastening portion by penetrating the second joint ninth fastening portion.

[0018]

[0019] A non-powered finger prosthesis according to an embodiment of the present invention can be used on a finger that has been amputated up to the proximal interphalangeal joint (PIP joint) to perform the function of the joint, thereby assisting in smooth performance of daily life or work activities.

[0020] In addition, the wireless finger prosthesis according to the embodiment of the present invention is easy to attach to amputated fingers of various sizes, can be manufactured at low cost, and can be easily assembled and disassembled, so it can be conveniently used.

[0021] The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

[0022]

[0023] The attached drawings are intended to explain the contents of the present invention in more detail to a person skilled in the art, but the technical idea of ​​the present invention is not limited thereto.

[0024] FIG. 1 is a perspective view showing a non-powered finger prosthetic hand according to an embodiment of the present invention viewed from above.

[0025] FIG. 2 is a drawing showing an exploded perspective view of a non-powered finger prosthesis according to an embodiment of the present invention.

[0026] FIG. 3 is a perspective view showing an exploded view of the second joint housing part of a non-powered finger prosthesis according to an embodiment of the present invention.

[0027] FIG. 4 is a perspective view showing an exploded view of a second joint member of a non-powered finger prosthesis according to an embodiment of the present invention.

[0028] FIG. 5 is a perspective view showing an exploded view of a third joint member of a non-powered finger prosthesis according to an embodiment of the present invention.

[0029] FIG. 6 is a drawing showing a stopper structure that prevents the third joint member from being bent in the reverse direction when the non-powered finger prosthesis according to an embodiment of the present invention is spread out.

[0030] FIG. 7 is a drawing showing a structure for preventing the third joint member from being excessively bent when a non-powered finger prosthesis according to an embodiment of the present invention is bent.

[0031] FIG. 8 is a drawing showing a photograph of a non-powered finger prosthesis according to an embodiment of the present invention actually worn on a finger amputated up to the proximal interphalangeal joint.

[0032]

[0033] Hereinafter, a non-powered finger prosthesis (10) according to an embodiment of the present invention will be described in detail, but the scope of the rights of the non-powered finger prosthesis (10) is not limited by the following description.

[0034] Throughout the specification, whenever a part is said to “include” a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise stated.

[0035] Below, specific details for implementation are described with reference to the attached drawings.

[0036]

[0037] FIG. 1 is a perspective view showing a non-powered finger prosthesis (10) according to an embodiment of the present invention when viewed from above, FIG. 2 is a perspective view showing an exploded perspective view of a non-powered finger prosthesis (10) according to an embodiment of the present invention, FIG. 3 is a perspective view showing an exploded second joint housing part (200) of a non-powered finger prosthesis (10) according to an embodiment of the present invention, FIG. 4 is a perspective view showing an exploded second joint member of a non-powered finger prosthesis (10) according to an embodiment of the present invention, and FIG. 8 is a view showing a photograph of a non-powered finger prosthesis (10) according to an embodiment of the present invention actually being worn on a finger amputated up to the proximal interphalangeal joint.

[0038] Referring to FIG. 1, the wireless finger prosthesis (10) of the present invention is largely composed of a first joint member (100), a second joint housing member (200), a third joint member (300), and a back of hand pivot member (400).

[0039] Referring to FIGS. 1 and 2, the first joint member (100) is formed by a first joint first member (110) and a first joint second member (120), is connected to the back of the hand pivot portion (400), and may include a ring-shaped finger ring (114) through which a severed finger passes through the first joint first member (110).

[0040] In addition, the second joint housing part (200) is formed by a second joint first member (210) and a second joint second member (220), and may include a second joint third member (230) and a second joint fourth member (240) connected to the first joint member (100) therein.

[0041] In addition, the third joint member (300) is connected to the second joint third member (230) and the second joint fourth member (240), and may have the shape of a severed fingertip joint.

[0042] Referring to FIGS. 1, 2, and 8, the back of the hand pivot part (400) is connected to the first joint member (100) on one side and includes a length adjustment part (403) that can adjust the length, and can be connected to a wrist support part (410) on the other side. The wrist support part (410) is connected to the lower end of the back of the hand pivot part (400) on one side and can include a wrist strap or the like on the other side. However, any configuration that can support the wireless finger prosthesis (10) of the present invention without shaking can be used without limitation. Therefore, the wireless finger prosthesis (10) of the present invention can be supported without shaking when used through the wrist support part (410). The length adjustment part (403) included in the back of the hand pivot part (400) can move the wrist support part (410) so that it can be adjusted according to the length of the back of the hand.

[0043] Referring to FIG. 2, the first joint first member (110) includes a first joint first fastening portion (111) on one side forming an upwardly convex curved body, a first joint second fastening portion (112) on the upper side of the other side forming an upwardly convex curved body, a first joint third fastening portion (113) on the lower side of the other side, and may include a finger ring (114) including a sweat discharge ventilation hole on the lower side between the one side and the other side, and a ring adjustment portion (115) whose size can be adjusted according to the finger length.

[0044] The above-mentioned upwardly convex curved body can protect the amputated finger from the outside, and the finger ring (114) can secure the amputated finger, and the finger ring can be manufactured according to the finger thickness size. In addition, by including a sweat discharge ventilation hole at the lower part of the finger ring (114), the non-powered finger prosthesis (10) can be worn comfortably for a long time without discomfort when wearing it and performing daily life or work activities, and the non-powered finger prosthesis (10) can be prevented from coming off from the amputated finger due to sweat. In addition, by including a ring adjustment part (115) that can adjust the size according to the finger length between one side and the other side of the first segment first member (110), the non-powered finger prosthesis (10) of the present invention can be conveniently used by moving the finger ring (114) in the one side and the other side direction to fit the length of the amputated finger.

[0045] In addition, the first node second member (120) may include a first node fourth fastening portion (121) on one side forming an upwardly convex curved body, and a first node fifth fastening portion (122) on the other side forming an upwardly convex curved body.

[0046] In addition, the back of the hand pivot portion (400) may include a back of the hand pivot first fastening portion (401) fastened to the first joint first fastening portion (111) at the lower end of one side, and a back of the hand pivot second fastening portion (402) fastened to the first joint fourth fastening portion (121) at the upper end of one side.

[0047] Referring to FIG. 4, the second segment first member (210) may include a second segment first fastening portion (211) on one side, a second segment second fastening portion (212) on the upper side, and a second segment third fastening portion (213) on the lower side. In addition, the second segment second member (220) may include a second segment fourth fastening portion (221) on one side, a second segment fifth fastening portion (222) on the upper side, and a second segment sixth fastening portion (223) on the lower side.

[0048] Accordingly, referring to FIG. 3, the second joint housing part (200) formed by the second joint first member (210) and the second joint second member (220) can be formed by the second joint second fastening part (212) and the second joint fifth fastening part (222) being fastened, and the second joint third fastening part (213) and the second joint sixth fastening part (223) being fastened.

[0049] Referring to FIG. 4, the second segment third member (230) may include a second segment seventh fastening portion (231) fastened to the second segment first fastening portion (211) on one side, and a second segment eighth fastening portion (232) fastened to the first segment third fastening portion (113) on the other side. In addition, the second segment fourth member (240) may include a second segment ninth fastening portion (241) fastened to the second segment fourth fastening portion (221) on one side, a second segment tenth fastening portion (242) fastened to the first segment second fastening portion (112) on the upper side on the other side, and a second segment eleventh fastening portion (243) fastened to the first segment fifth fastening portion (122) on the lower side on the other side.

[0050] In addition, referring to FIG. 4, the third joint member (300) may include a third joint first fastening portion (301) fastened to the second joint seventh fastening portion (231) at the upper end of one side, a third joint second fastening portion (302) fastened to the second joint ninth fastening portion (241) at the lower end of one side, and a rubber tip (303) at the lower end of the other side.

[0051] In addition, the upper part of the other side of the third joint member (300), i.e., the nail area, can be designed to be concave to enable delicate movements as a nail replacement effect.

[0052] Accordingly, a user using the non-powered finger prosthesis (10) of the present invention can bend or extend the non-powered finger prosthesis (10) by passing the amputated finger through the finger ring (114) included in the first joint first member (110).

[0053] When the above-described non-powered finger prosthesis (10) is bent, force is applied to the lower end of the finger ring (114) by bending the amputated finger, so that the first segment first member (110) and the first segment second member (120) connected to the back of the hand pivot first fastening portion (401) and the back of the hand pivot second fastening portion (402) rotate inward, and due to the interaction of the first segment first member (110) and the second segment third member (230) connected to the first segment second member (120) and the second segment fourth member (240), the third segment member (300) connected to the second segment third member (230) and the second segment fourth member (240) can simultaneously rotate inward.

[0054] In contrast, when the non-powered finger prosthesis (10) is spread, the first segment first member (110) and the first segment second member (120) connected to the back of the hand pivot first fastening portion (401) and the back of the hand pivot second fastening portion (402) are rotated outward by applying force to the upper end of the finger ring (114) by spreading the amputated finger, and the second segment third member (230) and the second segment fourth member (240) connected to the first segment first member (110) and the first segment second member (120) can simultaneously rotate outward due to the interaction of the second segment third member (230) and the second segment fourth member (240).

[0055]

[0056] FIG. 5 is a perspective view showing an exploded view of the third joint member (300) of a non-powered finger prosthesis (10) according to an embodiment of the present invention.

[0057] Referring to FIG. 5, the rubber tip (303) can be made of a special material such as conductive silicone to enable operation of a smartphone, etc., and the rubber tip (303) can be used without limitation as long as it is made of a material that can enable operation of a smartphone, etc. In addition, the rubber tip (303) can be manufactured with an anti-slip pattern to make it easy to pick up slippery objects when performing daily life or work activities. In addition, the rubber tip (303) can have a replaceable fitting structure that is perpendicular to the direction in which the force is applied, and according to this, the rubber tip (303) can be attached and detached without bonding, and the rubber tip (303) can be used during daily life or work activities without easily coming off.

[0058]

[0059] FIG. 6 is a drawing showing a stopper structure that prevents the third joint member (300) from being bent in the reverse direction when the non-powered finger prosthesis (10) according to an embodiment of the present invention is spread out.

[0060] Referring to FIGS. 3 and 6, when a severed finger is spread while wearing the non-powered finger prosthesis (10) of the present invention, the second segment third member (230) that is spread with the third segment first fastening portion (301) and the second segment fourth member (240) that is spread with the third segment second fastening portion (302) can be formed in an X-shaped structure so that the third segment member (300) is not bent in the reverse direction. In addition, when the second segment housing portion (200) and the third segment member (300) are firmly fastened, a stopper structure (part indicated in red) that prevents the third segment member (300) from being bent in the reverse direction can be formed. Here, the reverse direction means the opposite direction to the direction in which the finger is bent, and it can prevent the third joint member (300) from being severely bent in the reverse direction due to a repulsive force from an object and not functioning properly, or the third joint member (300) from being broken.

[0061]

[0062] FIG. 7 is a drawing showing a structure for preventing the third joint member (300) from being excessively bent when the non-powered finger prosthesis (10) according to an embodiment of the present invention is bent.

[0063] When the finger is bent while wearing the non-powered finger prosthesis (10) of the present invention, the third joint member is bent in a range of 0° to 60°, for example, 2° to 58°, 4° to 56°, 6° to 54°, 8° to 52°, 10° to 50°, 12° to 48°, 14° to 46°, 16° to 44°, 18° to 42°, or 20° to 40°, so that the second joint second fastening portion (212) is fastened to the third joint first fastening portion (301) by penetrating the second joint seventh fastening portion (231), and the second joint fourth fastening portion (221) is fastened to the third joint second fastening portion (302) by penetrating the second joint ninth fastening portion (241). It can be fastened. In addition, by being firmly fastened to the upper part of one side of the third joint member (300) and the second joint second member (220) part (the part indicated in red), excessive bending of the third joint member (300) can be prevented.

[0064]

[0065] The term "connection" or "fastening" described in the specification of the present invention means that each component can be connected or fastened using a fastening tool, such as a screw or bolt, commonly used by those skilled in the art in the field of technology related to finger prosthetics, and any means capable of connecting or fastening each component can be used without limitation.

[0066] Therefore, the above-mentioned wireless finger prosthesis (10) can be used on an amputated finger to perform the function of the joint in the case of a finger amputated up to the proximal interphalangeal joint, thereby assisting in performing daily life or work activities smoothly, and can be easily mounted on amputated fingers of various sizes, can be manufactured at low cost, and can be easily assembled and disassembled, making it convenient to use.

[0067] Specifically, the non-powered finger prosthesis (10) according to an embodiment of the present invention can be manufactured using a 3D printer. For example, the 3D printer can be selected from a filament extrusion method (FDM or FFF) that laminates a raw material such as ABS used in a plastic injection material into thin layers through an extrusion process, a stereolithography (SLA) method that hardens and laminates a liquid photopolymer by irradiating a beam onto a photopolymer, a selective sintering (SLS) method that applies a sintering process of engineering plastics and metal materials, and an inkjet method (Polyjet) that sprays a photopolymer in liquid form onto a build tray and solidifies the resin by irradiating it with a UV lamp.

[0068] In addition, the wireless finger prosthesis (10) according to an embodiment of the present invention can be manufactured using a metal 3D printer. A metal 3D printer is used to manufacture a product using metal powder and a laser, and can use the DED (Direct Energy Deposition) method and the PBF (Powder Bed Fusion) method. The DED method is a method of focusing a high-power laser, forming a molten pool on a base material, and supplying metal powder or wire to laminate it, and the PBF (Powder Bed Fusion) method is a method of spreading metal powder thinly and melting it by irradiating a high-power laser on the powder using the same principle as a laser printer.

[0069] Therefore, the present invention has the advantage of an easy manufacturing process by manufacturing each of the above components using the 3D printer or metal 3D printer.

[0070] In addition, by symmetrically assembling the above-described component configurations of the present invention, it can also be used on the opposite severed finger.

[0071]

[0072] Although the detailed description of the present invention has been made by way of an embodiment with reference to the attached drawings, the above-described embodiment is only a preferred example of the present invention, and therefore the present invention should not be understood as being limited to the above-described embodiment, and the scope of the rights of the present invention should be understood by the claims and their equivalent concepts.

[0073]

[0074] [Explanation of symbols]

[0075] 10: Non-powered finger prosthesis 223: Second joint, sixth joint

[0076] 100: 1st joint member 230: 2nd joint 3rd member

[0077] 110: 1st joint, 1st member 231: 2nd joint, 7th fastening member

[0078] 111: 1st joint, 1st fastening part 232: 2nd joint, 8th fastening part

[0079] 112: 1st joint 2nd fastening member 240: 2nd joint 4th member

[0080] 113: 1st joint, 3rd fastening part 241: 2nd joint, 9th fastening part

[0081] 114: Finger ring 242: 2nd joint 10th joint

[0082] 115: Ring adjustment part 243: 2nd joint 11th fastening part

[0083] 120: 1st joint 2nd member 300: 3rd joint member

[0084] 121: 1st joint 4th fastening part 301: 3rd joint 1st fastening part

[0085] 122: 1st joint, 5th fastening part 302: 3rd joint, 2nd fastening part

[0086] 200: Second joint housing 303: Rubber tip

[0087] 210: 2nd joint 1st member 400: Back of hand pivot part

[0088] 211: 2nd joint 1st fastening part 401: Back of hand pivot 1st fastening part

[0089] 212: Second joint, second fastening part 402: Back of hand pivot, second fastening part

[0090] 213: 2nd joint 3rd fastening part 403: Length adjustment part

[0091] 220: Second joint, second member 410: Wrist support

[0092] 221: 2nd joint, 4th joint

[0093] 222: Second joint, fifth joint

Claims

1. A non-powered finger prosthesis including a first joint member, a second joint housing member, a third joint member and a back of hand pivot member, A first segment member formed by a first segment first member and a first segment second member, connected to the back of the hand pivot portion, and including a ring-shaped finger ring through which a severed finger passes through the first segment first member; A second joint housing portion formed by a second joint first member and a second joint second member, and including a second joint third member and a second joint fourth member connected to the first joint member inside; A third joint member connected to the second joint third member and the second joint fourth member and having a shape of a severed fingertip joint; and A non-powered finger prosthesis, comprising: a length-adjusting member connected to the first joint member on one side and capable of adjusting the length; and a back-of-the-hand pivot member connected to a wrist support member on the other side.

2. In paragraph 1, The first joint first member includes a first joint first fastening portion on one side forming an upwardly convex surface, a first joint second fastening portion on the upper side of the other side forming an upwardly convex surface, a first joint third fastening portion on the lower side of the other side, and includes a finger ring including a sweat discharge ventilation hole on the lower side between the one side and the other side, and a ring adjustment portion capable of adjusting the size according to the finger length. The above first joint second member includes a first joint fourth fastening portion on one side forming an upwardly convex surface, and a first joint fifth fastening portion on the other side forming an upwardly convex surface. A non-powered finger prosthesis, wherein the back of the hand pivot portion includes a back of the hand pivot first fastening portion connected to the first joint first fastening portion at the lower end of one side, and a back of the hand pivot second fastening portion connected to the first joint fourth fastening portion at the upper end of one side.

3. In paragraph 2, The above second joint first member includes a second joint first fastening portion on one side, a second joint second fastening portion on the upper side, and a second joint third fastening portion on the lower side, The second joint second member includes a second joint fourth fastening portion on one side, a second joint fifth fastening portion on the upper side, and a second joint sixth fastening portion on the lower side. The second joint third member includes a second joint seventh fastening portion connected to the second joint first fastening portion on one side, and a second joint eighth fastening portion connected to the first joint third fastening portion on the other side. A non-powered finger prosthesis, wherein the second segment fourth member includes a second segment ninth fastening portion connected to the second segment fourth fastening portion on one side, a second segment tenth fastening portion connected to the first segment second fastening portion on the upper side of the other side, and a second segment eleventh fastening portion connected to the first segment fifth fastening portion on the lower side of the other side.

4. In paragraph 3, A non-powered finger prosthesis, wherein the second joint housing portion is formed by connecting the second joint second fastening portion and the second joint fifth fastening portion, and connecting the second joint third fastening portion and the second joint sixth fastening portion.

5. In paragraph 3, A non-powered finger prosthesis, wherein the third joint member comprises a third joint first fastening portion connected to the second joint seventh fastening portion at an upper end on one side, a third joint second fastening portion connected to the second joint ninth fastening portion at a lower end on one side, and a rubber tip at a lower end on the other side.

6. In paragraph 5, A non-powered finger prosthesis, wherein the second joint third member connected to the third joint first fastening portion and the second joint fourth member connected to the third joint second fastening portion are formed in an X-structure so that the third joint member is not bent in the opposite direction when the finger is spread.

7. In paragraph 5, A non-powered finger prosthesis, wherein the second joint second fastening portion is fastened to the third joint first fastening portion by passing through the second joint seventh fastening portion, and the second joint fourth fastening portion is fastened to the third joint second fastening portion by passing through the second joint ninth fastening portion so that the third joint member can be bent within a range of 0° to 60° when the finger is bent.

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