TWM568689U - Knuckle fixation device - Google Patents

Abstract

A knuckle fixation device includes a first fixing unit, a second fixing unit and at least one elastic member. The first fixing unit includes a first wearing body for the fingers to extend, and a first connecting plate extending on one side of the first wearing body and extending in a direction of penetration. The second fixing unit includes a second wearing body for the finger to extend, and a second connecting board extending from the second wearing body toward the first fixing unit and pivotally connected to the first connecting board, the first connecting board and the first connecting board The two webs are of a rigid structure. The two ends of the elastic member are respectively connected to the first fixing unit and the second fixing unit, and the elastic member can be bent and tends to return to a straight state extending in the first direction, so that the second fixing unit is pivoted relative to the first fixing unit After the rotation, the state is restored to the same direction as the first fixing unit in the extending direction.

Description

Knuckle fixation device

The present invention relates to a fixation device, and more particularly to a fixation device for a knuckle joint.

In general, the trigger finger is also called the snap finger, and its official medical name is "stenosing tenosynovitis of the flexor tendons". When the patient bends the finger, the tendon is bound by the transverse ligament pulley system in the vicinity of the metacarpophalangeal joint, that is, the tendon and tendon sheath are inflamed due to excessive friction, further forming nodules, thus causing the fingers to fail. Straighten out.

For patients with symptoms of the trigger, in addition to appropriate medical treatment, the fixation device can be worn to maintain the finger joint in the correct position, thereby reducing the chance of recurrence of the trigger finger, and even if wearing the fixture, the palm joint It is not restricted by the fixtures and affects the convenience of daily life and action. Therefore, the development and production of the rehabilitation device of the trigger refers to the long-term attention.

Generally, the fixing device comprises a plurality of spaced-apart wearing bodies, and at least one elastic member disposed between the adjacent two wearing bodies and connecting the adjacent two wearing bodies, each The wearing body runs through to form a wearing mouth. When the fixing device is worn, the user wears a finger through the wearing port to sleeve the wearing body to the joint portion to be worn, that is, the wearing of the fixing device can be completed.

However, in the use of the existing fixing device, since the two wearing bodies are only connected by the elastic elastic member, when the patient wants to bend the finger, the patient may over-stress or overcome the elastic restoring force of the elastic member. Fingers are bent excessively, causing second damage to the fingers. In addition, if the two wearing bodies are connected only by the elastic members, not only the overall structural strength is insufficient, but also the sides of the knuckles are exposed to the outside, which tends to cause safety protection. On the other hand, when the elastic member is too large in volume, the mutual wear of the fixing means worn by the adjacent fingers is liable to occur, which causes inconvenience in use. Therefore, there is obviously still much room for improvement in the existing fixtures.

Accordingly, it is an object of the present invention to provide a fixture that improves the above problems.

Therefore, the novel knuckle fixing device comprises: a first fixing unit, a second fixing unit and at least one elastic member. The first fixing unit includes a first wearing body adapted for the finger to extend, and a first connecting plate extending on a side of the first wearing body and extending in a direction of penetration. The first connecting plate is a rigid structure. . The second fixing unit includes a second wearing body adapted for the finger to extend, and a second wearing body a second connecting plate extending in the direction of the first fixing unit and pivotally connected to the first connecting plate, the second connecting plate being of a rigid structure. The two ends of the elastic member are respectively connected to the first fixing unit and the second fixing unit, and the elastic member can be bent and tends to return to a straight state extending in a first direction, so that the second fixing unit is opposite After the first fixing unit is pivoted, it returns to a state extending in the same direction as the first fixing unit.

In some embodiments, the first fixing unit further includes a third connecting plate on a pair of sides of the first connecting plate and extending from the first wearing body toward the extending direction, the second fixing unit further The fourth connecting board is disposed on a pair of sides of the second connecting board and pivoted to the third connecting board, wherein the third connecting board and the fourth connecting board are of a rigid structure.

In some embodiments, the knuckle fixing device includes two elastic members disposed in parallel with each other between the first fixing unit and the second fixing unit, and two ends of each elastic member are respectively connected In the first fixing unit and the second fixing unit, the elastic members may be bent and tend to return to a straight state extending in the first direction, so that the second fixing unit is opposite to the first fixing unit After pivoting, it returns to a state in which it extends in the same direction as the first fixing unit.

In some embodiments, the lengths of the first web and the second web are equal, and the lengths of the third web and the fourth web are equal, and the first web and the second web are The pivoting position corresponds to a pivotal position of the third web and the fourth web.

In some embodiments, the elastic members have the same spring constant.

In some embodiments, the first connecting plate has a first plate portion connected to the first wearing body, and a first plate portion is not connected to one end of the first wearing body and extends toward the extending direction. a first pivoting portion; the second connecting plate has a second plate portion connecting the second wearing body and being on the same side of the first plate portion, and a second plate portion is not connected to the second wearing body a second pivoting portion extending toward the first fixing unit and pivoting the first pivoting portion, and the second fixing unit pivoting relative to the first pivoting portion with the second pivoting portion as an axis When the predetermined angle is reached, the second plate portion is pressed against the first plate portion to restrict the second wearing body from continuing to rotate to the first fixing unit.

In some embodiments, the first connecting plate further has a first through hole formed through the first pivoting portion, and the second connecting plate further has a through hole formed in the second pivoting portion and communicates with the first through hole. a perforated second perforation, the knuckle fixation device further comprising a first piercing member extending through the first perforation and the second perforation.

In some embodiments, the third connecting plate has a third plate portion connected to the first wearing body, and a third plate portion is not connected to one end of the first wearing body and extends toward the extending direction. a third pivoting portion; the fourth connecting plate has a fourth plate portion connecting the second wearing body and being on the same side of the third plate portion, and a fourth wearing portion is not connected to the second wearing body a fourth pivoting portion extending toward the first fixing unit and pivoting the third pivoting portion, and the second fixing unit pivoting relative to the third pivoting portion with the fourth pivoting portion as an axis At the predetermined angle, the fourth plate portion is pressed against the third plate portion The second wearing body is restricted from continuing to rotate to the first fixing unit.

In some embodiments, the third connecting plate further has a third through hole formed through the third pivoting portion. The fourth connecting plate further has a through hole formed in the fourth pivoting portion and communicates with the third through hole. a third perforated fourth perforation, the knuckle fixation device further comprising a second piercing member extending through the third perforation and the fourth perforation.

In some embodiments, the first fixing unit has a rigid structure, and the first wearing body assumes a ring shape and defines a notch.

In some embodiments, the second fixation unit is a rigid structure and the second wear body exhibits a closed loop shape.

In some embodiments, the elastic member is made of a memory metal.

In some embodiments, the elastic member is made of Nitinol.

In some embodiments, the elastic member is made of a gold cadmium alloy.

In some embodiments, the elastic member is made of a silver cadmium alloy.

In some embodiments, the first web and the second web have a thickness of between 1 and 5 millimeters (mm).

In some embodiments, the third web and the fourth web have a thickness of between 1 and 5 millimeters.

The utility model has the advantages that: by reducing the thickness of the connecting plates and reducing the overall volume, the patient can effectively avoid the mutual squeezing when the two knuckle fixing devices are worn on the adjacent two fingers, and at the same time, the first Fixed unit and the second fixed The unit is a hard structure that greatly enhances the overall structural strength. In addition, the finger is worn by the first fixing unit and the second fixing unit, thereby limiting the bending angle of the finger and still providing operational flexibility of the patient's finger. In another aspect, providing an elastic restoring force to the first fixing unit and the second fixing unit through the elastic members can assist in pulling back the curved finger of the patient to avoid second injury of the patient's finger.

1‧‧‧First fixed unit

11‧‧‧First wearing body

111‧‧‧ gap

12‧‧‧First link board

121‧‧‧First Board

21‧‧‧Second wearer

22‧‧‧Second link board

221‧‧‧ Second Board

222‧‧‧Second pivotal

223‧‧‧second perforation

122‧‧‧First pivotal

123‧‧‧First perforation

13‧‧‧ Third link board

131‧‧‧ Third Board

132‧‧‧ Third pivotal joint

133‧‧‧ third perforation

14‧‧‧floor

2‧‧‧Second fixed unit

23‧‧‧4th link board

231‧‧‧4th Board

232‧‧‧fourth pivotal

233‧‧‧fourth perforation

3‧‧‧Flexible parts

4‧‧‧First wearing parts

5‧‧‧Second fittings

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a perspective view of an embodiment of the present knuckle fixation device; FIG. 2 is a perspective view of the embodiment. FIG. 3 is a cross-sectional view taken along line III-III of FIG. 1 illustrating the first fixing of the embodiment. FIG. 3 is a cross-sectional view of the first fixing unit, a second fixing unit, and the second elastic member. The unit, the second fixing unit and the elastic members are in a flat state; FIG. 4 is a perspective view of another aspect of the embodiment; and FIG. 5 is a cross-sectional view taken along line VV of FIG. For example, the first fixing unit, the second fixing unit and the elastic members are in a bent state.

1 to 3, an embodiment of the novel knuckle fixation device, It is suitable for wearing with a single finger, so as to provide protection and fixed function for the finger. Specifically, the knuckle fixing device includes a first fixing unit 1, a second fixing unit 2, and two elastic members 3. In this embodiment, the knuckle fixing device is sleeved on the index finger of a patient as shown in FIG. 3 , wherein the first fixing unit 1 is fixed to the proximal phalanx of the index finger, and the second The fixing unit 2 is fixed to the distal phalanx of the index finger, however, the knuckle fixing device can be worn over any finger, and is not limited to the following description.

Referring to FIG. 1 to FIG. 3, the first fixing unit 1 includes a first wearing body 11 adapted for finger penetration, a first one on the side of the first wearing body 11 and extending along an extending direction of an index finger. a connecting plate 12, a third connecting plate 13 on a pair of sides of the first connecting plate 12 and extending from the first wearing body 11 in the extending direction, and a bottom edge of the first wearing body 11 facing The bottom plate 14 extends in the opposite direction. Further, the first connecting plate 12 has a first plate portion 121 connected to the first wearing body 11, and one end of the first wearing portion 11 not connected to the first wearing portion 11 extends toward the extending direction. The first pivoting portion 122 and the first through hole 123 are formed through the first pivoting portion 122. The third connecting plate 13 has a third plate portion 131 connected to the first wearing body 11 , and a third plate portion 131 that is not connected to one end of the first wearing body 11 and extends in the direction in which the index finger extends. The third pivoting portion 132 and a third through hole 133 formed through the third pivoting portion 132 . In this embodiment, the first fixing unit 1 is of a hard structure. For example, the first fixing unit 1 is made of polylactic acid (Polylactic Acid or Polylactide, PLA), and the polylactic acid has light weight and structural strength. good And the advantages of easy shaping, help to maintain the overall strength of the fixing device and easy to manufacture, and the nature of rapid degradation after being discarded can also achieve environmental protection effect. Of course, the first fixing unit 1 is in other In an embodiment, it may also be made of polycarbonate (Polycarbonate, PC), or nylon, or a mixture of nylon and carbon fiber, or a mixture of nylon and glass fiber, or a composite material such as copolyester (PETG). .

Referring to FIG. 1 to FIG. 3, in the embodiment, the first fixing unit 1 is formed by the 3D printing device to reduce the thickness of the first connecting plate 12 and the third connecting plate 13, but not in the 3D column. The output of the printing device is limited. Therefore, when the patient wears the two-finger joint fixing device on two adjacent fingers, the frictional pressing of the two-finger joint fixing device can be effectively reduced to improve the comfort of the patient's finger. In addition, the first wearing body 11 has a ring shape and defines a notch 111 with an opening facing upward, and the first wearing body 11 is closely surrounding the index finger, so that the second fixing unit 2 can be stably operated, and then On the one hand, the wearing space defined by the first wearing body 11 can be adjusted and enlarged by the notch 111 defined by the first wearing body 11 to make the first wearing body 11 easier to be used by the index finger. Take it down. The first wearing body 11 is adapted to be sleeved at the proximal knuckle of the index finger and abut against the arc. In a preferred embodiment, the first connecting plate 12 and the third connecting plate 13 extend along the left and right sides of the proximal phalanx of the index finger toward the second fixing unit 2, thereby protecting the proximal phalanx of the index finger. . Furthermore, the top surface of the bottom plate 14 abuts against the portion of the palm and cooperates with the first wearing body 11 to limit the joint between the index finger and the palm. It is flat and protects the joint between the index finger and the palm.

Referring to FIG. 1 to FIG. 3 , the second fixing unit 2 includes a second wearing body 21 adapted for the finger to extend, and a second wearing body 21 extending toward the first fixing unit 1 and pivoted thereto. The second connecting plate 22 of the first connecting plate 12 and a fourth connecting plate 23 pivotally connected to the pair of sides of the second connecting plate 22 and pivotally connected to the third connecting plate 13 . Further, the second connecting plate 22 has a second plate portion 221 connected to the second wearing body 21 and being on the same side of the first plate portion 121, and the second plate portion 221 is not connected to the second wearing portion. One end of the body 21 extends toward the first fixing unit 1 and pivotally connects to the second pivoting portion 222 of the first pivoting portion 122 , and a second pivoting portion 222 is formed through the second pivoting portion 222 and communicates with the first through hole 123 . Second perforation 223. The fourth connecting plate 23 has a fourth plate portion 231 connected to the second wearing body 21 and being on the same side of the third plate portion 131, and one end of the second wearing body 21 is not connected to the fourth plate portion 231. a fourth pivoting portion 232 extending toward the first fixing unit 1 and pivotally connecting the third pivoting portion 132, and a fourth through hole 233 extending through the fourth pivoting portion 232 and communicating with the third through hole 133 . In this embodiment, the second fixing unit 2 is of a hard structure. For example, the second fixing unit 2 is made of polylactic acid (Polylactic Acid or Polylactide, PLA), and the polylactic acid has light weight and structural strength. The advantages of good and easy shaping help to maintain the overall strength of the fixing device and are easy to manufacture, and the nature of rapid degradation after being discarded can also achieve environmental protection effects. Of course, the second fixing unit 2 is in other In the embodiment, it can also be made of polycarbonate (PC), or nylon, or nylon. It is made of a mixture of carbon fiber, or a mixture of nylon and glass fiber, or a composite material such as a copolymerized polyethylene terephthalate (PETG).

In this embodiment, the second fixing unit 2 is shaped and formed by the 3D printing device as the first fixing unit 1 to reduce the thickness of the second connecting plate 22 and the fourth connecting plate 23, and the second connecting portion The thickness of the plate 22 is substantially equal to the thickness of the first connecting plate 12, and the thickness of the fourth connecting plate 23 is substantially equal to the thickness of the third connecting plate 13, in particular, the first pivoting portion 122 and the The thickness of the second pivoting portion 222 is substantially equal to the thickness of the first plate portion 121 or the second plate portion 221, and the thickness of the third pivot portion 132 and the fourth pivot portion 232 is increased. It is also equivalent to the thickness of the third plate portion 131 or the fourth plate portion 231, thereby maintaining a uniform thickness of the overall thickness. In a preferred embodiment, the first connecting plate 12, the second connecting plate 22, the third connecting plate 13 and the fourth connecting plate 23 have thickness values ranging from 1 to 5 mm, respectively. When the patient wears the two-finger joint fixture on two adjacent fingers, the frictional squeezing of the two-finger joint fixture can be effectively reduced to improve the comfort of the patient's hand.

Referring to FIG. 2 to FIG. 5, in addition, the second wearing body 21 has a closed ring shape and is adapted to be sleeved at the distal phalanx of the index finger for tightly surrounding the end of the patient's index finger and stabilize the index finger. The second wearing body 21 is pivoted to bring the index finger into a bent state and a straight state. In a preferred embodiment, the second connecting plate 22 and the fourth connecting plate 23 are extended toward the first fixing unit 1 along the left and right sides of the distal phalanx of the index finger. And extending to the first connecting plate 12 and the third connecting plate 13 respectively at the middle end joint of the index finger to protect the distal phalanx of the index finger and the middle end phalanx of the index finger. In addition, during the operation of the finger, the middle end joint of the finger is a main bend, and therefore, the pivotal joint of the first connecting plate 12 and the second connecting plate 22, and the third connecting plate 13 The pivotal portion of the fourth connecting plate 23 is disposed on both sides of the joint at the center end to protect not only the middle end joint, but also the second connecting plate 22 and the fourth connecting plate 23 can follow the middle end knuckle and The distal knuckle is bent to pivot relative to the first fixation unit 1 to protect the central knuckle and the distal phalanx. In a preferred embodiment, the lengths of the first connecting plate 12 and the third connecting plate 13 are equal, and the lengths of the second connecting plate 22 and the fourth connecting plate 23 are equal. That is, the pivotal position of the first web 12 and the second web 22 corresponds to the pivotal position of the third web 13 and the fourth web 23, thereby making the second body 21 It can be stably pivoted relative to the first fixing unit 1.

2, in the embodiment, the knuckle fixing device further includes a first through member 4 extending through the first through hole 123 and the second through hole 223, and a third through hole 133 extending through the first through hole 223. And the second through member 5 of the fourth through hole 233, so that the first connecting plate 12 and the second connecting plate 22, and the third connecting plate 13 and the fourth connecting plate 23 are not easily along the operation The opposite direction is detached. Of course, in another embodiment, the first connecting plate 12 and the second connecting plate 22, and the third connecting plate 13 and the fourth connecting plate 23 can also be pivotally connected through the structure without being locked. Need to install this additional A fitting 4 and the second fitting 5 are provided.

Referring to FIG. 1 , FIG. 2 and FIG. 4 , the elastic members 3 are disposed in parallel with each other between the first fixing unit 1 and the second fixing unit 2 , and two ends of each elastic member 3 are respectively connected to the first portion. a fixing unit 1 and the second fixing unit 2, more specifically, the elastic member 3 extends along a top side edge of the first web 12 and a top side edge of the second web 22, and the elastic member 3 The two ends are respectively disposed in the first wearing body 11 and the second wearing body 21, and the other elastic member 3 is along the top side edge of the third connecting plate 13 and the top side edge of the fourth connecting plate 23. The two ends of the elastic member 3 are respectively disposed in the first wearing body 11 and the second wearing body 21, thereby providing a proper bending space for the elastic members 3. In a preferred embodiment, the elastic members 3 are made of a nickel-titanium alloy having the same modulus of elasticity, but are not limited thereto. The elastic members 3 may also be made of gold-cadmium alloy. Or made of a memory metal such as silver cadmium alloy, the elastic members 3 can be bent and tend to return to a straight state extending in a first direction, that is, the elastic members 3 can enable the second fixing The unit 2 is pivoted relative to the first fixing unit 1 and returned to the same state as the first fixing unit 1 in the extending direction, and the index finger can be quickly returned to the straight state after being bent. In particular, the elastic members 3 are presented in a straight metal wire state, and the thickness thereof is approximately equal to the thickness of the connecting plates. In other words, the metal wires passing through the smaller volume are used as the elastic members 3, which can be achieved. Reduce the overall volume of the effect.

In particular, in the embodiment, although the first fixing unit 1 The first connecting plate 12 and the third connecting plate 13 are provided. However, the first fixing unit 1 is not limited to have the first connecting plate 12 and the third connecting plate 13 . In another embodiment, The first fixing unit 1 may also have one of the first connecting plate 12 and the third connecting plate 13 . Similarly, the second fixing unit 2 may also have the second connecting plate 22 and the fourth connecting plate 23 . One of them, and the single connecting plates of the first fixing unit 1 and the second fixing unit 2 are pivotally connected to each other in the same side state, and the existing problem can be improved. In addition, the second fixing unit 2 can also increase the number according to the actual injured position requirement, and is not limited to the first embodiment.

Referring to FIG. 2 to FIG. 5, when the patient bends the index finger, the second fixing unit 2 pivots to the first pivoting portion 122 with the second pivoting portion 222 as an axis as shown in FIG. 4 and FIG. When the second fixing unit 2 pivots relative to the third pivoting portion 132 to the predetermined angle with the fourth pivoting portion 232 as an axis, the second plate portion 221 is pressed against the first The plate portion 121 and the fourth plate portion 231 are pressed against the third plate portion 131 to collectively restrict the second wearable body 21 from continuing to rotate to the first fixing unit 1. Generally, the knuckle fixing device passes through the rigid portion. The first fixing unit 1 and the second fixing unit 2 protect the finger and prevent the finger from being excessively bent, and then assist the pull back of the finger in a straight state after the finger is bent by the elastic member 3 having the elastic function. This not only provides the flexibility of the patient's hand operation, but also avoids secondary damage to the hand.

In summary, the novel knuckle fixation device reduces the first The thickness of the connecting plate 12, the second connecting plate 22, the third connecting plate 13, and the fourth connecting plate 23, and the use of a metal wire as the elastic member 3 to reduce the overall volume, allowing the patient to wear the two-knuckle joint fixing device When the two fingers are adjacent to each other, the mutual extrusion can be effectively avoided. At the same time, the first fixing unit 1 and the second fixing unit 2 have a rigid structure, which greatly improves the overall structural strength. In addition, the finger is worn by the first fixing unit 1 and the second fixing unit 2, thereby limiting the bending angle of the finger and still providing operational flexibility of the patient's finger. In another aspect, the elastic member 3 is provided with an elastic restoring force on the first fixing unit 1 and the second fixing unit 2, which can assist in pulling back the curved finger of the patient to avoid second injury of the patient's finger. It is indeed possible to achieve the purpose of this new type.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

Claims (17)

A knuckle fixing device comprising: a first fixing unit, comprising a first wearing body adapted for the finger to extend, and a first connecting plate extending on a side of the first wearing body and extending in a direction of penetration The first connecting plate has a rigid structure; a second fixing unit includes a second wearing body adapted for the finger to extend, and a second wearing body extends toward the first fixing unit and is pivotally connected to the second wearing body a second connecting plate of the first connecting plate, the second connecting plate is a rigid structure; and at least one elastic member, the two ends are respectively connected to the first fixing unit and the second fixing unit, and the elastic member can be bent and It tends to return to a flat state extending in a first direction, and the second fixing unit is pivoted relative to the first fixing unit to return to a state extending in the same direction as the first fixing unit. The knuckle fixing device of claim 1, wherein the first fixing unit further comprises a third connecting plate on a pair of sides of the first connecting plate and extending from the first wearing body toward the extending direction The second fixing unit further includes a fourth connecting plate on a pair of sides of the second connecting plate and pivotally connected to the third connecting plate, wherein the third connecting plate and the fourth connecting plate are rigid structures . The knuckle fixing device according to claim 1 or 2, comprising two elastic members, which are disposed in parallel with each other between the first fixing unit and the second fixing unit, and two ends of each elastic member Connected to the first fixing unit and the second fixing unit respectively, the elastic members can be bent and tend to return to A flat state extending in the first direction causes the second fixing unit to pivot relative to the first fixing unit to return to a state in which the first fixing unit extends in the extending direction. The knuckle fixing device of claim 2, wherein the first connecting plate and the second connecting plate are of equal length, and the third connecting plate and the fourth connecting plate are of equal length, the first connecting plate The pivotal position of the second connecting plate corresponds to a pivotal position of the third connecting plate and the fourth connecting plate. The knuckle fixation device of claim 3, wherein the elastic members have the same elastic modulus. The knuckle fixing device of claim 4, wherein the first connecting plate has a first plate portion connected to the first wearing body, and a first plate portion is not connected to one end of the first wearing body a first pivoting portion extending toward the extending direction; the second connecting plate has a second plate portion connecting the second wearing body and being on the same side of the first plate portion, and a second plate portion a second pivoting portion extending from one end of the second wearing body and extending to the first fixing unit and pivoting the first pivoting portion, wherein the second fixing unit is axially opposite to the second pivoting portion When the first pivoting portion is pivoted to a predetermined angle, the second plate portion is pressed against the first plate portion to restrict the second wearing body from continuing to rotate toward the first fixing unit. The knuckle fixing device of claim 6, wherein the first connecting plate further has a first through hole formed through the first pivoting portion, and the second connecting plate further has a through hole formed in the second The pivoting portion and the second through hole of the first through hole, the knuckle fixing device further includes a first through member extending through the first through hole and the second through hole. The knuckle fixing device according to claim 7, wherein the third connecting plate has a third plate portion connected to the first wearing body, and a third plate portion is not connected to one end of the first wearing body a third pivoting portion extending toward the extending direction; the fourth connecting plate has a fourth plate portion connecting the second wearing body and being on the same side as the third plate portion, and a fourth plate portion is not a fourth pivoting portion extending from one end of the second wearing body to the first fixing unit and pivoting the third pivoting portion, wherein the second fixing unit is axially opposite to the fourth pivoting portion When the third pivoting portion is pivoted to the predetermined angle, the fourth plate portion is pressed against the third plate portion to restrict the second wearing body from continuing to rotate toward the first fixing unit. The knuckle fixing device of claim 8, wherein the third connecting plate further has a third through hole formed through the third pivoting portion, the fourth connecting plate further having a through hole formed in the fourth And a fourth through hole that communicates with the third through hole, the knuckle fixing device further includes a second through member extending through the third through hole and the fourth through hole. The knuckle fixation device according to claim 1, wherein the first fixing unit has a rigid structure, and the first wearing body assumes a ring shape and defines a notch. The knuckle fixation device of claim 1, wherein the second fixation unit is of a rigid structure and the second wearer presents a closed loop shape. The knuckle fixation device of claim 1, wherein the elastic member is made of a memory metal. The knuckle fixation device of claim 12, wherein the elastic member is made of Nitinol. The knuckle fixation device of claim 12, wherein the elastic member is made of a gold cadmium alloy. The knuckle fixation device of claim 12, wherein the elastic member is made of silver cadmium alloy. The knuckle fixation device of claim 1, wherein the first web and the second web have a thickness of between 1 and 5 mm. The knuckle fixation device of claim 2, wherein the third web and the fourth web have a thickness of between 1 and 5 mm.