CN100581507C - Mechanical knee joint capable of flexing when going back - Google Patents
Mechanical knee joint capable of flexing when going back Download PDFInfo
- Publication number
- CN100581507C CN100581507C CN200710119263A CN200710119263A CN100581507C CN 100581507 C CN100581507 C CN 100581507C CN 200710119263 A CN200710119263 A CN 200710119263A CN 200710119263 A CN200710119263 A CN 200710119263A CN 100581507 C CN100581507 C CN 100581507C
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- China
- Prior art keywords
- ratchet
- self
- knee joint
- locking
- sheave
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 210000000629 knee joint Anatomy 0.000 title claims abstract description 25
- 210000002414 leg Anatomy 0.000 claims abstract description 15
- 210000000689 upper leg Anatomy 0.000 claims abstract description 9
- 238000005491 wire drawing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 210000003127 knee Anatomy 0.000 claims description 8
- 210000003141 lower extremity Anatomy 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract description 14
- 210000003414 extremity Anatomy 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 244000309466 calf Species 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 description 14
- 210000000988 bone and bone Anatomy 0.000 description 7
- 230000005021 gait Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000013016 damping Methods 0.000 description 3
- 230000003796 beauty Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000002266 amputation Methods 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
Images
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- Prostheses (AREA)
Abstract
The present invention relates to biomedical engineering technology, and is one mechanical knee joint capable of bending slightly during drawing back. The mechanical knee joint includes one ratchet wheel connected to artificial thigh, one lower connecting body connected to artificial calf, one ratchet connected through one disc spring to the lower connecting body and matched with the ratchet wheel, one grooved wheel rotated by the ratchet via the first wire, one main leg bending spring, etc. The present invention has double self locking to ensure the safety in use, automatic leg bending to result in natural pace and less impact of ground on the artificial limb, simple mechanical structure and other advantages.
Description
Technical field
The present invention relates to a kind ofly have artificial limb and retreat the mechanical knee joint that Shi Kewei goes down on one's knees, belong to the biomedical engineering technology field.
Background technology
The implanted bone is integrated artificial limb, the company's of being also referred to as bone prosthesis, direct synthetism artificial limb and bone implantable prosthetic, it is to use for reference the artificial joint technology, the remaining skeleton intracavity of patients with amputation is inserted in the upper end of an intermediate connector, the lower end of intermediate connector is passed skin and is stretched out externally, and the novel artificial limb mounting technology of artificial limb directly is installed in the lower end of intermediate connector.The implanted bone is integrated the artificial limb biggest advantage and is to have saved the necessary receptive cavity of conventional prosthesis, thereby has avoided the series of malpractice brought thus.But integrating artificial limb, the implanted bone do not have receptive cavity to bring a deficiency yet, be exactly that shock loading suffered in the motor process is directly delivered to remaining skeleton, lacked this buffering link of receptive cavity and stump soft tissue, it is poorer than the conventional prosthesis impact resistance to that is to say.Clinical trial shows, is subjected to intensive foreign impacts if the implanted bone is integrated the prosthetic wearing person, easily causes the crooked or fracture of intermediate connector, causes second operation, brings very big physiological misery and financial burden to the patient.Investigation to middle connector bending or fracture cause finds that this situation mostly occurs when independently not retreating.
At present owing to be not applicable to the high power capacity portable power source of artificial thigh,, that is to say that present artificial limb knee-joint all can't initiatively go down on one's knees when retreating so also there is not the powered prosthesis knee joint product that when retreating, to go down on one's knees.Therefore the present invention is on the basis of utility model patent 91222982.9 wide-angle load-bearing knee joint with locking function, proposed a kind of when retreating little knee joint of going down on one's knees initiatively, not only can improve the bio-imitability of artificial limb knee-joint, also make the implanted bone integrate the artificial limb performance simultaneously and further improve.
Summary of the invention
The purpose of invention is: proposed a kind of when retreating little mechanical knee joint of going down on one's knees initiatively.
Retreat the mechanical knee joint that Shi Kewei goes down on one's knees and covers, this mechanical knee joint comprises ratchet (1), following connector (2), dish spring (3), ratchet (4), first wire drawing (5), sheave (6), moving pin (7), self-lock pin (8), the main spring (9) that bends one's legs, second wire drawing (10);
Ratchet (1) links to each other with the artificial limb thigh; Following connector (2) links to each other with the artificial limb shank; Following connector (2) connects ratchet (4) by dish spring (3), and ratchet (4) cooperates with ratchet (1); During not load-bearing of lower limb, under dish spring (3) effect, following connector (2) drives ratchet (4) and rotates, and ratchet (4) and ratchet (1) are broken away from, and removes friction self-locking; Ratchet (4) passes through first wire drawing (5) and drives sheave (6) rotation 10 degree, makes moving pin (7) drive the self-locking hole of self-lock pin (8) disengaging on ratchet (1), removes the pin self-locking; At this moment, the main spring (9) that bends one's legs will drive ratchet (1) and rotate 5 degree, realize initiatively bending one's legs; Knee joint is stretched in the process, and ratchet (1) drives sheave (6) by second wire drawing (10) and rotates (10) degree, makes moving pin (7) drive self-lock pin (8) and enters self-locking hole, realizes stretching not load-bearing self-locking under the situation; In 70 degree scopes, under the load-bearing situation, following connector (2) drives ratchet (4) and compresses ratchet (1), realizes arbitrarily angled friction self-locking.
No matter the present invention (is still walking) about 5 degree of bending automatically artificial limb knee-joint forward by installing the bent mechanism of bending of a spring additional backward under the not load-bearing situation.When not changing forward characteristic, having solved when retreating artificial leg can not bent problem of bending, and athletic posture is attractive in appearance, and bionical performance is good, the impact when having reduced independently not retreat.Also set up a cover Geneva mechanism in addition, guaranteed that knee joint can keep straight configuration under situation about not stressing.
Spring is bent bends mechanism and adopts respectively the mode that is connected mutually with thigh and calf, has two springs to make knee joint reach required calibration.When thigh lifted, the spring that always is in extended state shrank, and drove the shank joint rotation of staying with one's parents in order to make them happy, and reached the bent automatically function of bending certain bumper angle of knee joint.After reaching bumper angle, spring transfers compressive state to, plays control joint damping and helps the effect of stretching.
Wide-angle load-bearing self-locking mechanism adopts the form of unidirectional frictional damping.The distortion of relative thigh when utilizing the shank load-bearing drives unidirectional self-lock piece (being the ratchet of clutch) and contacts with the friction pulley (being ratchet) that the upper joint bulk phase connects, and reaches the function of arbitrarily angled self-locking, only 70 ° is designed with interior bent lower limb self-locking in this programme.
Not load-bearing condition lower shank stretches self-locking mechanism and adopts Geneva mechanism to realize.Under the not load-bearing condition, sheave will push up on the self-lock pin all the time, and thigh and shank are connected.When becoming not load-bearing by load-bearing, utilize moving of self-locking block in the wide-angle load-bearing self-locking mechanism to drive sheave and change an angle, self-lock pin will experience a released state in this process, and shank just becomes flexing by stretching.
Advantage of the present invention is:
(1) double self locking, the assurance patient's is safe in utilization;
(2) realize during walking bending one's legs automatically, the gait natural beauty in the face of the impact of artificial limb with reducing;
(3) frame for movement is simple, realizes that easily cost is low.
Description of drawings
Fig. 1 is a schematic diagram of mechanism of the present invention.
Fig. 2 is a Geneva mechanism structural representation of the present invention.
Fig. 3 is a structural representation of the present invention.
The specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
Fig. 1 is a schematic diagram of mechanism of the present invention.Fig. 2 is the Geneva mechanism structural representation.Fig. 3 is a structural representation of the present invention.
As shown in Figure 3: 1 is ratchet, and 2 are following connector, and 3 is the dish spring, and 4 is ratchet, and 5 is wire drawing, and 6 is sheave, and 7 is moving pin, and 8 is self-lock pin, and 9 is the main spring that bends one's legs, and 10 is wire drawing.Ratchet 1 links to each other with the artificial limb thigh; Following connector 2 links to each other with the artificial limb shank; During not load-bearing of lower limb, under 3 effects of dish spring, following connector 2 drives ratchet 4 and rotates, and ratchet 4 and ratchet 1 are broken away from, and removes friction self-locking; Ratchet 4 drives sheave 6 by wire drawing 5 and rotates 10 degree, makes moving pin 7 drive the self-locking hole that self-lock pin 8 breaks away from ratchet 1, removes the pin self-locking; At this moment, the main spring 9 that bends one's legs will drive ratchet 1 and rotate 5 degree, realize initiatively bending one's legs; Knee joint is stretched in the process, and ratchet 1 drives sheave 6 by wire drawing 10 and rotates 10 degree, makes moving pin 7 drive self-lock pin 8 and enters self-locking hole, realizes stretching not load-bearing self-locking under the situation; In 70 degree scopes, under the load-bearing situation, following connector 2 drives ratchet 4 and compresses ratchet 1, realizes arbitrarily angled friction self-locking.
The present invention is in conjunction with spring flexing mechanism, unidirectional frictional damping formula self-locking mechanism and sheave pin self-locking mechanism, make artificial limb knee-joint realize load-bearing self-locking at any angle, stretch not load-bearing self-locking under the situation, realize that simultaneously (forward or backward) is automatically about bending 5 degree in the gait processes.Its concrete working method is as follows:
With an one-sided gait cycle is example, and setting toe liftoff is the beginning of gait cycle.
Toe is liftoff, and lower limb are load-bearing no longer, and under dish spring ratchet torsion spring and shank deadweight effect, ratchet rotates counterclockwise 10 degree, breaks away from ratchet, removes friction self-locking.Simultaneously, ratchet drives sheave coaxial rotation 10 degree, and self-lock pin is moved downward, and breaks away from self-locking hole, removes the pin self-locking.After the self-locking releasing, under main bent lower limb spring drove, ratchet was rotated counterclockwise 5 degree, realized initiatively bending one's legs.In the whole swing mutually, under the main spring action that bends one's legs, it is crooked that knee joint keeps, and guarantees the gait smoothness.Swing phase latter end, under the shank effect of inertia, ratchet turns clockwise with respect to shank and stretches fully up to knee joint, drives sheave rotation 10 degree simultaneously, makes self-lock pin enter self-locking hole, realizes stretching not load-bearing self-locking under the situation.After entering support mutually heelstrike, the lower limb load-bearing, ratchet turns clockwise, and compresses ratchet, realizes friction self-locking.Whole support keeps this state mutually always.Begin whole process repeated mutually up to next one swing.
Fallback procedures is consistent with the process of advancing.
Arbitrarily angled in 70 degree scopes, if the lower limb load-bearing, then ratchet will compress ratchet, realize arbitrarily angled friction self-locking.
Frame for movement of the present invention is simple, easily realizes; Double self locking, the assurance patient's is safe in utilization; Realize during walking bending one's legs automatically, the gait natural beauty is faced the impact of artificial limb with reducing; Cost is low.
Claims (1)
1, retreats the mechanical knee joint that Shi Kewei goes down on one's knees and covers, it is characterized in that this mechanical knee joint comprises ratchet (1), following connector (2), dish spring (3), ratchet (4), first wire drawing (5), sheave (6), moving pin (7), self-lock pin (8), the main spring (9) that bends one's legs, second wire drawing (10);
Ratchet (1) links to each other with the artificial limb thigh; Following connector (2) links to each other with the artificial limb shank;
Following connector (2) connects ratchet (4) by dish spring (3), and ratchet (4) cooperates with ratchet (1);
The joint is when not load-bearing of lower limb, and ratchet (4) passes through first wire drawing (5) and drives sheave (6) rotation, and sheave (6) rotates and makes moving pin (7) drive the self-locking hole of self-lock pin (8) disengaging on ratchet (1), and the main spring (9) that bends one's legs will drive ratchet (1) rotation;
Knee joint is stretched in the process, and ratchet (1) drives sheave (6) by second wire drawing (10) and rotates, and makes moving pin (7) drive self-lock pin (8) and enters self-locking hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710119263A CN100581507C (en) | 2007-07-19 | 2007-07-19 | Mechanical knee joint capable of flexing when going back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710119263A CN100581507C (en) | 2007-07-19 | 2007-07-19 | Mechanical knee joint capable of flexing when going back |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101081183A CN101081183A (en) | 2007-12-05 |
| CN100581507C true CN100581507C (en) | 2010-01-20 |
Family
ID=38911115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710119263A Expired - Fee Related CN100581507C (en) | 2007-07-19 | 2007-07-19 | Mechanical knee joint capable of flexing when going back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100581507C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104873316B (en) * | 2015-04-28 | 2019-04-12 | 繁昌县倍思生产力促进中心有限公司 | A kind of unilateral knee sprung orthopedic appliance |
| JP6700389B2 (en) * | 2015-10-26 | 2020-05-27 | ポメロイ, ポールPomeroy, Paul | Mechanical joint with switchable rotational restraint clutch and method for mechanically interconnecting upper prosthesis to lower prosthesis |
| CN113456321B (en) * | 2021-06-30 | 2022-06-21 | 吉林大学 | Bionic active knee joint |
| CN114732575B (en) * | 2022-04-15 | 2024-09-20 | 上海理工大学 | Disconnected connecting rod hip joint power artificial limb |
-
2007
- 2007-07-19 CN CN200710119263A patent/CN100581507C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101081183A (en) | 2007-12-05 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20130719 |