CN103598937B - The discontinuous artificial knee joint of a kind of instantaneous Center - Google Patents

The discontinuous artificial knee joint of a kind of instantaneous Center Download PDF

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Publication number
CN103598937B
CN103598937B CN201310547042.2A CN201310547042A CN103598937B CN 103598937 B CN103598937 B CN 103598937B CN 201310547042 A CN201310547042 A CN 201310547042A CN 103598937 B CN103598937 B CN 103598937B
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CN
China
Prior art keywords
connecting rod
rod part
tibial component
knee joint
lower end
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CN201310547042.2A
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Chinese (zh)
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CN103598937A (en
Inventor
杨连发
陈家霆
何玉林
王宁华
吴春蕾
胡竹林
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桂林电子科技大学
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Priority to CN201310547042.2A priority Critical patent/CN103598937B/en
Publication of CN103598937A publication Critical patent/CN103598937A/en
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Publication of CN103598937B publication Critical patent/CN103598937B/en

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Abstract

The invention discloses the discontinuous artificial knee joint of a kind of instantaneous Center, comprise femur upper connecting rod part, tibial component; Have one in tibial component through expansion link wherein, the lower end of expansion link and the lower end of tibial component hinged, upper end and the femur upper connecting rod part of expansion link are hinged, and the lower end plane of femur upper connecting rod part and the upper transverse plane of tibial component contact with each other; A side of femur upper connecting rod part passes through mutually or tangent curved surface with its lower end plane, femur upper connecting rod part has to side the grooved rail that extends to curved surface at the pin joint place of expansion link and femur upper connecting rod part, and grooved rail width is greater than the maximum gauge of expansion link.The present invention and the kneed centrode of natural human body very close, bending and stretching and there is in standing process good static stability and dynamic stability, bionical remarkably productive.

Description

The discontinuous artificial knee joint of a kind of instantaneous Center

Technical field

The present invention relates to technical field of medical instruments, be specifically related to the discontinuous artificial knee joint of a kind of instantaneous Center.

Background technology

Artificial limb knee-joint is widely used in robot and human body artificial limb.Knee joint be human body maximum be also the most complicated joint, equally in lower artificial limb, knee joint is the most important, when the support that it can help human body to realize standing and walking flexibly with attractive in appearance.Be mainly used in artificial knee joint at present and be divided into single-axis knee joint and polycentric knee joint.Stability of standing and flexible stability weigh kneed major criterion, and for linkage, for ensureing stability of standing, be all by improving instantaneous position to realize, but instantaneous position is improved, and its flexible stability reduces, and both are contradiction each other.

As Chinese patent CN1205622A discloses a kind of artificial knee joint of single shaft, it is simple that this artificial knee joint has structure, easy, the advantage that cost is low, but the center of rotation of the thigh and calf of single-axis knee joint artificial limb is constant, as hinge, its dynamic stability is poor.In addition, multi link artificial knee joint mechanism, as Chinese patent CN282256Y discloses a kind of double leval jib artificial knee joint mechanism, it is primarily of upper knee joint, lower knee joint, front rod, back link, stop, take-up device composition, it overcomes known " energy storage merit skeleton double leval jib joint " and there is the advantages such as deficiency such as quadrilateral structure instability, swing, dead point, but its centrode is continuous print curve.In addition, also there is same problem in Chinese patent CN202154771U.

Nature human body knee joint is in flexing or stretching process, and it is instantaneous becomes when being, instantaneous track is not a continuous print curve.Slide because it has and roll and the characteristic of depositing, therefore, possess good stability of standing, motility and good flexion and extension characteristic.The relative instantaneous center line of artificial knee joint mechanism and the relative instantaneous center line of human body knee joint reality more close, then their motion is more similar, and its compensatory effect is just unreasonable to be thought.

Summary of the invention

Not enough for current used artificial knee joint instantaneous Center continuous print, the invention provides the discontinuous artificial knee joint of a kind of instantaneous Center.This artificial knee joint and the kneed centrode of natural human body very close, bending and stretching and there is in standing process good static stability and dynamic stability, bionical remarkably productive.

Technical scheme of the present invention is as described below.

The discontinuous artificial knee joint of a kind of instantaneous Center, comprises femur upper connecting rod part, tibial component; Have one in tibial component through expansion link wherein, the lower end of expansion link and the lower end of tibial component hinged, upper end and the femur upper connecting rod part of expansion link are hinged, and the lower end plane of femur upper connecting rod part and the upper transverse plane of tibial component contact with each other; A side of femur upper connecting rod part passes through mutually or tangent curved surface with its lower end plane, and femur upper connecting rod part has to side the grooved rail that extends to curved surface at the pin joint place of expansion link and femur upper connecting rod part, and grooved rail width is greater than the diameter of expansion link.

Described expansion link is made up of swinging connecting rod part, ball link, elastic article, one end of swinging connecting rod part is swivel pin, the other end is piston cylinder, one end of ball link is bulb, the other end is piston, swinging connecting rod part and ball link are by piston and piston cylinder sliding connection, and elastic article is arranged between the piston cylinder port of swinging connecting rod part and the bulb of ball link.

Described artificial knee joint is also provided with lower connecting rod part and back-moving spring, and described lower connecting rod part 7 passes through hinge with the lower end of tibial component, and described back-moving spring is connected between tibial component and lower connecting rod part.

Accompanying drawing explanation

Fig. 1 is the structural representation of the discontinuous artificial knee joint of instantaneous Center.

Fig. 2 is the A-A view of Fig. 1.

Fig. 3 is the schematic perspective view of the discontinuous artificial knee joint of instantaneous Center.

In accompanying drawing: 1. femur upper connecting rod part; 2. expansion link; 201. swinging connecting rod parts; 202. ball link; 203. extension spring; 3. tibial component; 301. groove; 302. flange; 4. hinge; 5. hinge; 6. buffer stopper; 7. lower connecting rod part; 8. back-moving spring.

Detailed description of the invention

Below in conjunction with drawings and Examples, the present invention is described in further detail.

The discontinuous artificial knee joint of a kind of instantaneous Center, comprises femur upper connecting rod part 1, tibial component 3.One is had through retractable rod 2 wherein in tibial component 3, the lower end of retractable rod 2 and the lower end of tibial component 3 hinged, upper end and the femur upper connecting rod part 1 of retractable rod 2 are hinged, and the lower end plane of femur upper connecting rod part 1 and the upper transverse plane of tibial component 3 contact with each other.A side of femur upper connecting rod part 1 is the curved surface tangent with its lower end plane, femur upper connecting rod part 1 has to side the grooved rail 101 that extends to curved surface at the pin joint place of expansion link and femur upper connecting rod part, and grooved rail width is greater than the maximum gauge of expansion link.

Described tibial component 3 can allow expansion link be the groove 301 of a spot wobble with its lower end pin joint having to side through retractable rod 2 place.

Owing to there is grooved rail 101 and groove 301, and the length of retractable rod 2 can be elongated, therefore the corner of the relative femur upper connecting rod part 1 of tibial component 3 is greater than 90 degree, and not only there is rotational action between the two, also there is scroll actions, cause the discontinuous of instantaneous Center, meet the kneed flexing of nature human body or stretching feature.

Described retractable rod 2 is made up of swinging connecting rod part 201, ball link 202, elastic article (this example adopts extension spring) 203, one end of swinging connecting rod part 201 is swivel pin, the other end is piston cylinder, one end of ball link 202 is bulb, the other end is piston, swinging connecting rod part 201 and ball link 202 are by piston and piston cylinder sliding connection, and extension spring 203 is arranged between the piston cylinder port of swinging connecting rod part 201 and the bulb of ball link 202.

The lower end of retractable rod 2 and the lower end of tibial component 3 are hinged by spherical linkage 5, and the sphere of the bulb of spherical linkage 5 can be exposed to the back side of ball cup.

When artificial knee joint is upright, under pressure at right angle effect, lower connecting rod part 7 can lock the bulb of spherical linkage 5, and retractable rod 2 can not swing, and further ensures the stability of standing of artificial knee joint.When bending or walk, the pressure at right angle of artificial knee joint disappears, and lower connecting rod part 7 unlocks the bulb of spherical linkage 5 under the effect of back-moving spring 8, does not therefore affect the motility of artificial knee joint.

The both sides groove face of the groove opened is arranged the flange 302 that can embed institute's fluting rail on femur upper connecting rod part 1 for tibial component 3, can prevent from relatively rotating between femur upper connecting rod part 1 and tibial component 3, ensure that static stability and the dynamic stability of artificial knee joint.

Just to the position of the sphere exposed division of spherical linkage bulb on lower connecting rod part 7, arrange buffer stopper 6, the impact to tibial component 3 can be reduced.Buffer stopper 6 can adopt elastic polymer material (as General Purpose Rubber or silicone rubber) to make, and the material with cushioning effect that other also can be adopted known is made.

Claims (8)

1. the discontinuous artificial knee joint of instantaneous Center, comprises femur upper connecting rod part (1), tibial component (3); It is characterized in that: have one in tibial component (3) through retractable rod (2) wherein, the lower end of retractable rod (2) and the lower end of tibial component (3) hinged, upper end and the femur upper connecting rod part (1) of retractable rod (2) are hinged, and the lower end plane of femur upper connecting rod part (1) and the upper transverse plane of tibial component (3) contact with each other; A side of femur upper connecting rod part (1) passes through mutually or tangent curved surface with its lower end plane, femur upper connecting rod part (1) has to side the grooved rail (101) that extends to curved surface at the pin joint place of retractable rod and femur upper connecting rod part, and grooved rail width is greater than the maximum gauge of retractable rod; Described retractable rod (2) is made up of swinging connecting rod part (201), ball link (202), elastic article (203), one end of swinging connecting rod part (201) is swivel pin, the other end is piston cylinder, one end of ball link (202) is bulb, the other end is piston, swinging connecting rod part (201) and ball link (202) are by piston and piston cylinder sliding connection, and elastic article (203) is arranged between the piston cylinder port of swinging connecting rod part (201) and the bulb of ball link (202); Described tibial component (3) can allow retractable rod be the groove (301) of a spot wobble with its lower end pin joint having to side through retractable rod (2) place.
2. artificial knee joint according to claim 1, the both sides groove face of the groove (301) that wherein said tibial component (3) is opened can embed in addition the flange (302) of institute's fluting rail on femur upper connecting rod part (1).
3. artificial knee joint according to claim 1, described elastic article (203) is wherein extension spring.
4. the artificial knee joint according to any one of claim 1-3, the lower end of retractable rod (2) wherein and the lower end of tibial component (3) are hinged by spherical linkage (5).
5. artificial knee joint according to claim 4, the sphere of wherein said spherical linkage (5) bulb can be exposed to the back side of ball cup.
6. artificial knee joint according to claim 4, also be provided with lower connecting rod part (7) and back-moving spring (8), described lower connecting rod part (7) is hinged by hinge (4) with the lower end of tibial component (3), and described back-moving spring (8) is connected between tibial component (3) and lower connecting rod part (7).
7. artificial knee joint according to claim 6, wherein said lower connecting rod part (7) is also provided with buffer stopper (6), and the position that described buffer stopper (6) is arranged is just to the sphere exposed division of spherical linkage (5) bulb.
8. artificial knee joint according to claim 7, wherein said buffer stopper (6) is made up of elastic polymer material.
CN201310547042.2A 2013-11-07 2013-11-07 The discontinuous artificial knee joint of a kind of instantaneous Center CN103598937B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310547042.2A CN103598937B (en) 2013-11-07 2013-11-07 The discontinuous artificial knee joint of a kind of instantaneous Center

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310547042.2A CN103598937B (en) 2013-11-07 2013-11-07 The discontinuous artificial knee joint of a kind of instantaneous Center

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CN103598937A CN103598937A (en) 2014-02-26
CN103598937B true CN103598937B (en) 2016-01-20

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108860359A (en) * 2018-05-11 2018-11-23 浙江大学 A kind of embedded legged type robot knee joint for integrating electro-hydraulic actuator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007002734A1 (en) * 2005-06-27 2007-01-04 Frye Todd Jarem Jr Prosthetic knee and leg assembly for use in athletic activities in which the quadriceps are normally used for support and dynamic function
US7658767B2 (en) * 2006-06-30 2010-02-09 Depuy Products, Inc. Hinged orthopaedic prosthesis
US8100967B2 (en) * 2007-05-01 2012-01-24 Moximed, Inc. Adjustable absorber designs for implantable device
CN101584615B (en) * 2009-07-02 2011-11-30 北京市春立正达医疗器械股份有限公司 The new axis type knee prosthesis
CN202154771U (en) * 2011-07-20 2012-03-07 陈建成 Knee device
CN203576701U (en) * 2013-11-07 2014-05-07 桂林电子科技大学 Artificial knee joint

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