KR20220168938A - Artificial knee joint - Google Patents

Abstract

An artificial knee joint according to an embodiment of the present disclosure comprises: an upper joint member configured so as to be fixed to the human body and formed to allow a first shaft to pass therethrough; a body portion formed to allow the first shaft, a second shaft, a third shaft, and a fourth shaft to pass therethrough, and connected to the upper joint member so as to be rotatable about the first shaft; a support member formed to pass through the second shaft and the third shaft, and connected to the body portion by the second shaft and the third shaft; a lower joint member configured so as to be fixed to a prosthetic leg and formed to allow a fifth shaft and a sixth shaft to pass therethrough; a first link member having one end rotatably coupled to the third shaft and the other end rotatably coupled to the fifth shaft; and a second link member having one end rotatably coupled to the fourth shaft and the other end rotatably coupled to the sixth shaft. The present invention prevents a wearer from accidentally falling.

Description

Artificial knee joint {ARTIFICIAL KNEE JOINT}

The present disclosure relates to an artificial knee joint, and more particularly, to an artificial knee joint capable of preventing unintentional knee bending or excessive knee bending during stance phase flexion.

In general, people with disabilities do not want to reveal their disabilities to the outside world. People with disabilities who wear prostheses hope to walk naturally like normal people. For the prosthetic wearer, research and development on prosthetic limbs capable of implementing natural walking have been actively conducted.

The artificial knee joint is the most important component of prosthetic limbs, and should be able to provide appropriate braking force according to each stage of the gait cycle in order to ensure the wearer's safety and realize natural gait. Accordingly, it is necessary to implement the movement of the artificial knee joint to which the prosthetic leg is mounted as similar as possible to the movement of the actual knee joint.

In the case of a conventional artificial knee joint, sudden knee bending unintentional by the prosthetic leg wearer may occur during the stance phase flexion. As a result, the prosthetic knee joint is excessively bent, or a malfunction of the prosthetic limb is induced, resulting in a serious injury such as a fall of the prosthetic wearer. Therefore, there is a need for an artificial knee joint that can secure safety by preventing such abnormal operation.

Embodiments disclosed herein relate to an artificial knee joint, and more specifically, to prevent a prosthetic wearer from suddenly falling during the stance phase while having a stance phase flexion at an angle desired by a user during walking. An artificial knee joint is provided.

An artificial knee joint according to an embodiment of the present disclosure is configured to be fixable to a human body, and an upper articular side member formed to pass a first axis through which a first axis, a second axis, a third axis, and a fourth axis pass through. A body portion formed and rotatably connected to the articular side member around a first axis, a support member formed to allow a second axis and a third axis to pass through, and connected to the body portion by the second axis and the third axis; A first link member configured to be fixed to the prosthetic leg and formed to pass the fifth and sixth axes, one end rotatably coupled to the third axis and the other end rotatably coupled to the fifth axis , and a second link member having one end rotatably coupled to the fourth shaft and the other end rotatably coupled to the sixth shaft.

According to an embodiment of the present disclosure, the main body has a 2_1 penetrating part through which the second axis passes and a 3_1 penetrating part through which the third axis passes, and the support member includes a 2_2 penetrating part through which the second axis passes and a third through part. The axis has a 3_2 penetration part, and the cross-sectional shape of the 2_1 penetration part is different from that of the 2_2 penetration part, or the cross-sectional shape of the 3_1 penetration part is different from that of the 3_2 penetration part.

According to an embodiment of the present disclosure, at least one of the second axis and the third axis has an eccentricity.

According to an embodiment of the present disclosure, the second axis and the third axis correspond to eccentric axes, and the mutually interlocked eccentric movement of the second axis and the third axis causes the first link member to fold the artificial knee joint during the stance phase. to provide a braking force in the opposite direction.

According to one embodiment of the present disclosure, the support member is formed to surround the articular side member in a U shape.

According to one embodiment of the present disclosure, the support member includes a depression formed to come into contact with the upper articular side member.

According to one embodiment of the present disclosure, it further includes an elastic member disposed between the body portion and the support member.

According to various embodiments of the present disclosure, the main body portion is configured so that four axes pass therethrough, so that the stance phase flexion can be implemented more stably.

According to various embodiments of the present disclosure, at least one of the second axis and the third axis is formed to have an eccentricity, thereby preventing excessive bending of the artificial knee joint or unintentional knee bending during the stance phase. there is.

According to various embodiments of the present disclosure, the artificial knee joint can operate as a unit while simplifying the structure of the artificial knee joint by the U-shaped member formed to surround the main body.

According to various embodiments of the present disclosure, the elastic member may be inserted between the main body and the U-shaped member during the stance phase to adjust elasticity required for bending in the stance phase.

According to various embodiments of the present disclosure, when a load of a wearer of a prosthetic leg is applied to the artificial knee joint, the elastic member is compressed in a vertical direction by the load, so that the shock and load that may be applied to the artificial knee joint and the body of the wearer of the prosthesis are evenly distributed. may be dispersed and/or absorbed.

Effects of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Embodiments of the present disclosure will be described with reference to the accompanying drawings described below, wherein like reference numbers indicate like elements, but are not limited thereto.
1 is an exemplary diagram illustrating a gait cycle of a person.
Figure 2 is an exemplary view showing a state in which the artificial knee joint according to an embodiment of the present disclosure is mounted on the amputation and prosthetic limbs.
3 is a perspective view of an artificial knee joint according to an embodiment of the present disclosure.
Figure 4 is a perspective view of the main body shown in Figure 3;
5 is a perspective view of the member disclosed in FIG. 3;
6 is a perspective view of the articular side member disclosed in FIG. 3;
7 is a side view showing a swing phase flexion state of an artificial knee joint according to an embodiment of the present disclosure.
8 is a perspective view of an artificial knee joint according to an embodiment of the present disclosure.
9 is an exemplary diagram showing a flexion state in the stance phase of an artificial knee joint configured to have an eccentricity according to an embodiment of the present disclosure.
10 is a perspective view of a second axis or a third axis according to an embodiment of the present disclosure.
11 is a perspective view of a first link member according to an embodiment of the present disclosure.

Hereinafter, specific details for the implementation of the present disclosure will be described in detail with reference to the accompanying drawings. However, in the following description, if there is a risk of unnecessarily obscuring the gist of the present disclosure, detailed descriptions of well-known functions or configurations will be omitted.

In the accompanying drawings, identical or corresponding elements are given the same reference numerals. In addition, in the description of the following embodiments, overlapping descriptions of the same or corresponding components may be omitted. However, omission of a description of a component does not intend that such a component is not included in an embodiment.

Advantages and features of the disclosed embodiments, and methods of achieving them, will become apparent with reference to the following embodiments in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, but only the present embodiments make the present disclosure complete, and the present disclosure does not extend the scope of the invention to those skilled in the art. It is provided only for complete information.

Terms used in this specification will be briefly described, and the disclosed embodiments will be described in detail. The terms used in this specification have been selected from general terms that are currently widely used as much as possible while considering the functions in the present disclosure, but they may vary according to the intention of a person skilled in the related field, a precedent, or the emergence of new technology. In addition, in a specific case, there is also a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present disclosure should be defined based on the meaning of the terms and the general content of the present disclosure, not simply the names of the terms.

Expressions in the singular number in this specification include plural expressions unless the context clearly dictates that they are singular. Also, plural expressions include singular expressions unless the context clearly specifies that they are plural. When it is said that a certain part includes a certain component in the entire specification, this means that it may further include other components without excluding other components unless otherwise stated.

In this specification, description of 'A and/or B' means 'A', or 'B', or 'A and B'.

In this specification, when a part is said to be connected to another part, this includes not only the case where it is directly connected, but also the case where it is connected with another component in between.

1 is an exemplary diagram illustrating a gait cycle of a person. A human gait cycle may consist of a stance phase and a swing phase. The stance phase refers to the period from the moment the foot touches the ground to the moment the foot is completely removed from the ground, and corresponds to steps a to d shown in FIG. 1 . The swing phase means the period from the moment the foot leaves the ground to the moment the foot steps on the ground, and corresponds to stages e to g shown in FIG. 1 .

In general, an artificial knee joint may be designed to generate a braking force in a knee extension direction when a leg to which a prosthetic leg is attached is in a stance phase. Through this, the bending of the artificial knee joint is limited, and the artificial knee joint can support the body weight of the prosthetic leg wearer by realizing the bending of the actual knee in the stance phase. Here, the stance phase flexion may refer to bending of the knee during the stance phase. As shown in FIG. 1, the stance phase flexion can be performed within a relatively small angular range compared to the swing phase flexion.

In particular, the stance phase flexion at the beginning and/or end of the stance phase may have a smaller angle than that of the middle stance phase. Specifically, referring to FIG. 1 , in the case of the initial stance phase (a) and/or the late stance phase (d), when the pedestrian places the sole of the foot on the ground or pushes the ground with the toe, the pedestrian's knee moves in the walking direction. It can be seen that the bending of The angle at which the knee is bent at this time may be smaller than the angle at which the knee is completely bent in the middle stance phase (b).

In the case of stance phase flexion at the beginning of the stance phase (a) and/or the end of the stance phase (d), natural implementation may be difficult because the artificial knee joint must be slightly bent at a predetermined angle in the walking direction. When a prosthetic wearer places the sole of the foot on the ground or pushes the ground for walking, abnormal motions such as excessive bending of the artificial knee joint or unintended sudden knee bending by the prosthetic leg wearer may occur.

2 is an exemplary view showing a state in which an artificial knee joint 200 according to an embodiment of the present disclosure is mounted on an amputated leg 1 and a prosthetic leg 3. According to one embodiment, the artificial knee joint 200 includes an upper joint member 210, a lower joint member 220, a body portion 230, a support member 240, a first link member 250, and a second link. A member 260 may be included. According to one embodiment, the support member 240 may correspond to a U-shaped member.

The articular side member 210 may be configured to be fixed to the human body. According to one embodiment, as shown in FIG. 2, the upper joint member 210 has a coupling part 212 formed thereon, and the socket 2 coupled to the wearer's body (eg, not cut 1). ) can be combined with Alternatively, the articular side member 210 and the socket 2 may be integrally configured.

The lower joint member 220 may be configured to be fixable to the prosthetic leg 3 . Here, the prosthetic leg 3 may include a pylon 4 and a foot 5. According to one embodiment, the lower joint member 220 may be combined with the pylon 4 of the prosthetic leg 3 by forming a coupling portion (not shown) at the lower portion.

The upper joint member 210 and the lower joint member 220 are combined with the body portion 230, the support member 240, the first link member 250, and the second link member 260 to have a predetermined angle. It can be folded as well. The artificial knee joint 200 is bent or unfolded according to the gait cycle by the main body 230, the support member 240, the first link member 250, and the second link member 260 to provide an appropriate braking force. can The lower configuration and coupling structure of the artificial knee joint 200 will be described in detail with reference to subsequent drawings.

3 is a perspective view of an artificial knee joint 200 according to an embodiment of the present disclosure. FIG. 4 is a perspective view of the main body 230 shown in FIG. 3 . FIG. 5 is a perspective view of the support member 240 shown in FIG. 3 . FIG. 6 is a perspective view of the articular side member 210 shown in FIG. 3 .

As shown in FIG. 3, the artificial knee joint 200 includes an upper joint member 210, a lower joint member 220, a body portion 230, a support member 240, a first link member 250, and a first link member 250. Two link members 260 may be included.

A first shaft 310 , a second shaft 320 , a third shaft 330 , and a fourth shaft 340 may pass through the body portion 230 . In one embodiment, the first axis 310, the second axis 320, the third axis 330, and the fourth axis 340 may be sequentially disposed forward based on the walking direction.

According to one embodiment, the body portion 230 may be rotatably connected to the articular side member 210 about the first shaft 310 . The body part 230 may be connected to the support member 240 through the second shaft 320 and the third shaft 330 . The body part 230 may be connected to the first link member 250 through the third shaft 330 . The body part 230 may be connected to the second link member 260 through the fourth shaft 340 .

In this way, four axes are formed to pass through the body portion 230 . The main body may be connected to the articular side member 210, the support member 240, the first link member 250, and the second link member 260 through four axes. By using this structure, natural stance phase flexion can be implemented stably while simplifying the structure of the artificial knee joint.

According to an embodiment, the main body 230 includes a 1_1 through part 410 through which the first axis 310 passes, and a 2_1 through part through which the second axis 320 passes (as shown in FIG. 4 ). 420), and a 3_1 through part 430 through which the third axis 330 passes, and a 4_1 through part 440 through which the fourth axis 340 passes. As shown in FIG. 4 , the 1_1st through part 410 to the 4_1st through part 440 may pass through the body part 230 along the y-axis direction. In one embodiment, some sections of the through part may be blocked.

In one embodiment, the 2_1 penetrating part 420 through which the second axis 320 passes and the 3_1 penetrating part 430 through which the third axis 330 passes pass through the central portion of the main body part 230. Each can be formed one by one.

In one embodiment, the cross-sectional shape of the 2_1st through part 420 and the 3_1st through part 430 may not correspond to a circular shape. For example, the cross-sectional shapes of the 2nd_1st penetration part 420 and the 3_1st penetration part 430 may correspond to an elliptical shape or an irregular curvature.

The cross-sectional shape of the 2_1 penetrating part 420 of the body part 230 through which the second shaft 320 passes is the 2_2 penetrating part 512, 522 of the support member 240 through which the second shaft 320 passes. may differ from For example, the cross-sectional shape of the 2_2 through portions 512 and 522 may correspond to a circular shape.

The cross-sectional shape of the 3_1 penetrating part 430 of the body part 230 through which the third shaft 330 passes is the 3_2 penetrating part 514, 524 of the support member 240 through which the third shaft 330 passes. may differ from For example, the cross-sectional shape of the 3_2 through portions 514 and 524 may correspond to a circular shape.

The cross-sectional shape of the 3_1 penetrating portion 430 of the main body 230 through which the third shaft 330 passes is the 3_3 of the first link member 250 or 1110 in FIG. 11 through which the third shaft 330 passes. It may be different from the penetrating portion (1120 in FIG. 11 ). For example, the cross-sectional shape of the 3_3 through part 1120 may correspond to a circular shape.

The second shaft 320 and/or the third shaft 330 may be configured to have a corresponding eccentricity while passing through a through-hole having a different cross-sectional shape. For example, as shown in FIG. 10 , cross-sectional shapes of the central portion and both ends of the shaft 1010 may be different from each other. Accordingly, the support member 240 and the first link member 250 connected to the second shaft 320 and/or the third shaft 330 may rotate eccentrically.

For example, the center of rotation of the main body 230 of the second shaft 320 and the center of rotation of the support member 240 of the second shaft 320 may be different from each other. The center of rotation of the main body 230 of the third shaft 330 and the center of rotation of the support member 240 and the first link member 250 of the third shaft 330 may be different from each other.

As a result, by limiting the movement of the first link member 250 forward of the artificial knee joint 200, sudden knee bending unintentional by the prosthetic wearer can be prevented.

As shown in FIGS. 3 and 5 , the support member 240 may include a first support member 510 and a second support member 520 . The first support member 510 and the second support member 520 may have structures corresponding to each other. The first support member 510 and the second support member 520 may be fastened to each other at one side. For example, the first support member 510 and the second support member 520 are formed through one or more fifth through-portions 518 formed on one side of each (the through-portion of the second support member 520 is not shown). They may be screwed together or bolted to each other to form a U-shaped member.

The support member 240 may be configured such that the second shaft 320 and the third shaft 330 pass therethrough, and the second shaft 320 and the third shaft 330 are fastened to the main body 230. . According to one embodiment, the support member 240 includes the 2_2 through-portions 512 and 522 through which the second axis 320 passes, and the 3_2 through-holes 514 and 524 through which the third axis 330 passes. can include The second shaft 320 may pass through the 2_1 through part 420 of the main body 230 and the 2_2 through part 512 or 522 of the support member 240 . The third shaft 330 may pass through the 3_1 through part 430 of the main body 230 and the 3_2 through part 514 and 524 of the support member 240 .

In one embodiment, the upper surface of the support member 240 may be in contact with the A-axis (see FIG. 6) of the articular side member 210. In this case, the upper surface of the support member 240 contacting the axis A may have a curve. For example, the support member 240 may include depressions 516 and 526 formed to contact the A axis of the articular side member 210 . Since the second shaft 320 is disposed later than the protruding part 350 in the walking direction, the support member 240 may secure the recessed parts 516 and 526 .

In one embodiment, the support member 240 may be disposed on the upper surface of the body portion 230 . In this case, the support member 240 may be formed to surround the articular side member 210 and/or the main body 230 in a U shape. The support member 240 may be coupled to one or more first link members 250 through the second shaft 320 . Accordingly, one or more first link members 250 connected to the second shaft 320 may operate as a unit without moving individually.

The first link member 250 and the second link member 260 connect between the lower joint member 220 and the main body 230 so that the artificial knee joint 200 provides an appropriate braking force according to each step of the gait cycle. can connect That is, the body portion 230 may be coupled to the lower joint member 220 through the first link member 250 and the second link member 260 .

The second shaft 320 may pass through one end 1120 of the first link member 250 . In addition, the second shaft 320 may pass through the 2_1 through part 420 of the main body 230 and the 2_2 through part 622 of the support member 240 . As a result, the body portion 230, the support member 240, and the first link member 250 may be rotatably coupled to each other.

The fourth shaft 340 may pass through one end 1120 of the second link member 260 . Also, the fourth shaft 340 may pass through the 4_1 penetrating portion 440 of the body portion 230 . As a result, the body portion 230 and the second link member 260 may be rotatably coupled to each other.

The lower joint member 220 may be connected to the body portion 230 through the first link member 250 and the second link member 260 . To this end, the lower joint member 220 may be configured such that the fifth shaft 360 and the sixth shaft 370 pass therethrough.

The fifth shaft 360 may pass through the other end ( 1130 in FIG. 11 ) of the first link member 250 or 1110 in FIG. 11 . In addition, the fifth shaft 360 may pass through the lower joint member 220 . As a result, the lower joint member 220 and the first link member 250 may be rotatably coupled to each other.

The sixth shaft 370 may pass through the other end 1130 of the second link member 260 . In addition, the sixth shaft 370 may pass through the lower joint member 220 . As a result, the lower joint member 220 and the second link member 260 may be rotatably coupled to each other.

As shown in FIGS. 3 and 6 , the first shaft 310 may pass through the articular side member 210 . The articular side member 210 may be connected to the body portion 230 through the first shaft 310 . In one embodiment, the articular side member 210 may include a 1_2 penetrating part 610 formed at a position corresponding to the 1_1 penetrating part 410 of the body part 230 . The 1_2 penetrating part 610 of the articular side member 210 and the 1_1 penetrating part 410 of the main body 230 may be rotatably coupled through the first shaft 310 .

In one embodiment, the articular side member 210 may include one or more protrusions 350 (corresponding to axis A in FIG. 6) protruding on both sides. In this case, the protrusion 350 may come into contact with the upper surface of the support member 240 . For example, the protruding portion 350 may contact the recessed portions 516 and 526 of the support member 240 . As the articular side member 210 rotates based on the first shaft 310, the protrusion 350 may contact the support member 240. For example, the protruding portion 350 is configured in the form of a roller, so that it can press the support member 240 downward while rotating along the upper surface of the support member 240 .

7 is a side view showing a swing phase flexion state of the artificial knee joint 200 according to an embodiment of the present disclosure. Specifically, FIG. 7 is a side view showing a state in which the artificial knee joint 200 is bent in the walking direction.

When the user wears a prosthetic leg and walks in the walking direction (direction of the arrow shown in FIG. 7), the main body portion 230 of the artificial knee joint 200 includes a first link member 250 and a second link member 260 As a result, the knee may be rotated around the second axis 320 and the fourth axis 340 in a folded form. Through this, the artificial knee joint 200 can implement swing phase flexion (bending) of the actual knee, and can provide an appropriate braking force according to the gait cycle. Here, the knee bending direction may refer to a rotational direction in which the artificial knee joint 200 is bent.

8 is a perspective view of an artificial knee joint 200 according to an embodiment of the present disclosure. Among the components shown in FIG. 8, descriptions of components corresponding to those shown in FIG. 3 are omitted.

In one embodiment, the artificial knee joint 200 may include an elastic member 810. In this case, the main body 230 may include a support 820 that supports the elastic member 810 so that it does not escape to the outside. The support 820 may be fixed to the main body 230 through one or more fixing members 830 .

The elastic member 810 may be disposed between the main body 230 and the support member 240 . Specifically, the elastic member 810 may be disposed between the front portion of the body portion 230 and the front portion of the support member 240 . The elastic member 810 may come into contact with the main body 230 and the support member 240 during the stance phase. In one embodiment, the elastic member 810 may be made of an elastic material. For example, the elastic member 810 may include urethane foam. The elastic member 810 may provide a resistance value (eg, elastic restoring force) required for bending in the stance phase by contacting the body 230 and the support member 240 during the stance phase. In addition, when a load of a prosthetic wearer is applied to the artificial knee joint 200, the elastic member 810 is compressed in the vertical direction by the load, thereby reducing the impact and load that may be applied to the artificial knee joint 200 and the body of the prosthetic wearer. can be evenly dispersed and/or absorbed. Accordingly, the elastic member 810 can protect the body of the wearer of the prosthetic leg and minimize fatigue that may occur during walking. In FIG. 8 , the elastic member 810 is shown in a rectangular parallelepiped shape, but is not limited thereto. For example, the elastic member 810 may have a cylindrical shape, a spherical shape, or any shape that may be disposed between the body portion 230 and the support member 240 .

According to one embodiment, it is possible to provide a customized artificial knee joint for each user by using the elastic member 810 having various elasticity.

9 is an exemplary view showing a flexion state of the artificial knee joint 200 in the stance phase according to an embodiment of the present disclosure. In FIG. 9, the first link member (250 in FIG. 2) shown in FIG. 2 is omitted from the configuration of the artificial knee joint 200 for a clear understanding of the stance phase flexion state. Conventional artificial knee joints may cause abnormal motions such as excessive knee bending or unintentional knee bending, as shown in FIG.

However, the artificial knee joint 200 according to an embodiment of the present disclosure can prevent this and implement a natural stance phase flexion state as shown in FIG. 9 . To this end, the parts of the second shaft 320 and the third shaft 330 passing through the support member 240 and the first link member (not shown), and the body portion 230 are connected to the second shaft 320 and The cross-sectional shape of the third shaft 330 may be different (refer to FIG. 10 ).

In one embodiment, the second shaft 320 and the third shaft 330 of the main body 230 respectively pass through the 2_1 through part 420 and the 3_1 through part 430 are formed in an asymmetric elliptical shape, while , The penetrating part of the support member 240 and the penetrating part of the first link member through which the second shaft 320 and the third shaft 330 pass may be formed in a circular shape. As a result, eccentric rotation of the second shaft 320 and the third shaft 330 is possible, and eccentric rotation according to an embodiment of the present disclosure is as follows.

Referring to FIG. 9, while the articular side member 210 rotates by an angle θ ₁ (eg, 9 degrees) around the first axis 910, the center of rotation of the support member formed by the second axis It moves eccentrically by the angle θ ₂ (eg, 20 degrees) (932, 934), and the center of rotation of the support member or the first link member formed by the third axis is rotated by the angle θ ₃ (eg, 10 degrees). ) as much as eccentric movement (942, 944). In this process, the protruding part 350 may move while contacting the recessed part of the support member 240 (922, 924). That is, while the articular side member 210 is rotated by an angle θ ₁ (eg, 9 degrees) around the first axis, movement of a limited angle may be allowed.

For example, a mechanism when both the second shaft 320 and the third shaft 330 correspond to eccentric shafts will be described. During the stance phase, while the articular side member 210 rotates at an angle of θ ₁ around the first axis 910, the support member 240 also moves to the position indicated by the dotted line in FIG. 9 (shown by the dotted line in FIG. 9). . At this time, the second shaft 320 moves eccentrically along arrow 1 (932, 934) and the third shaft 330 also moves eccentrically along arrow 2 (944, 942). That is, the eccentric rotation of the second axis 320 and the third axis 330 is partially converted into x-axis and/or y-axis movement of the second axis 320 and the third axis 330 . Eccentric movement of the third shaft 330 indicated by arrow 2 causes the first link member 250 connected to the third shaft 330 to also move in the direction of arrow 2 .

Interlocking between the second axis 320 and the third axis 330 moving eccentrically in this way allows the first link member 250 connected to the third axis 330 to move in the direction in which the artificial knee joint is folded during the stance phase. It acts as a brake to push the opposite side, thereby preventing excessive joint bending. As a result, the artificial knee joint 200 can sufficiently withstand the load generated during the stance phase, preventing sudden bending and realizing natural stance bending. In addition, abnormal motions such as excessive bending of the artificial knee joint 200 or unintended sudden bending of the knee by the prosthetic wearer can be prevented.

The preferred embodiments of the present invention described above have been disclosed for illustrative purposes, and those skilled in the art with ordinary knowledge of the present invention will be able to make various modifications, changes and additions within the spirit and scope of the present invention, and such modifications, changes and additions will be considered to fall within the scope of the above patent claims.

Those skilled in the art to which the present invention pertains can make various substitutions, modifications, and changes without departing from the technical spirit of the present invention. is not limited by

200: artificial knee joint
210: upper joint member
220: lower joint member
230: body part
240: support member
250: first link member
260: second link member
310: first axis
320: second axis
330: third axis
340: fourth axis
350: protrusion
360: fifth axis
370: sixth axis

Claims (7)

In the artificial knee joint,
a joint upper side member 210 configured to be fixable to the human body and formed to allow the first shaft 310 to pass therethrough;
The first shaft 310, the second shaft 320, the third shaft 330, and the fourth shaft 340 are formed to pass through, and the articular side member 210 is formed around the first shaft 310. ) and rotatably connected to the body portion 230;
A support member formed to allow the second shaft 320 and the third shaft 330 to pass therethrough and connected to the body portion 230 by the second shaft 320 and the third shaft 330 ( 240);
It is configured to be fixable to the prosthetic leg, and the joint lower side member 220 is formed to pass the fifth shaft 360 and the sixth shaft 370;
a first link member 250 having one end rotatably coupled to the third shaft 330 and the other end rotatably coupled to the fifth shaft 360; and
A second link member 260 having one end rotatably coupled to the fourth shaft 340 and the other end rotatably coupled to the sixth shaft 370
Including, artificial knee joint.
According to claim 1,
The main body has a 2_1 through part 420 through which the second shaft 320 passes and a 3_1 through part 430 through which the third shaft 330 passes through,
The support member 240 has 2_2 penetrating parts 512 and 522 through which the second shaft 320 passes and 3_2 through parts 514 and 524 through which the third shaft 330 passes,
The cross-sectional shape of the 2_1 through part 420 is different from the cross-sectional shape of the 2_2 through parts 512 and 522, or
The cross-sectional shape of the 3_1 through part 430 is different from the cross-sectional shape of the 3_2 through part 514, 524, the artificial knee joint.
According to claim 2,
At least one of the second shaft 320 and the third shaft 330 has an eccentricity, artificial knee joint.
According to claim 3,
The second shaft 320 and the third shaft 330 correspond to eccentric shafts,
The interlocked eccentric movement of the second axis 320 and the third axis 330 causes the first link member 250 to provide a braking force in the opposite direction to the direction in which the artificial knee joint is folded during the stance phase. , artificial knee joint.
According to claim 1,
The support member 240 is formed to surround the upper articular side member 210 in a U shape, artificial knee joint.
According to claim 5,
The artificial knee joint, wherein the support member 240 includes a recessed portion 526 formed to come into contact with the upper articular side member 210.
According to claim 1,
An artificial knee joint further comprising an elastic member 810 disposed between the body portion 230 and the support member 240.

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