CN201135512Y

CN201135512Y - Artificial limb keen joint structure

Info

Publication number: CN201135512Y
Application number: CNU200720172139XU
Authority: CN
Inventors: 陈森荣
Original assignee: DELIN ARTIFICIAL LIMBS ORTHOPEDIC REHABILITATION EQUIPMENT (SHENZHEN) Co Ltd
Current assignee: DELIN ARTIFICIAL LIMBS ORTHOPEDIC REHABILITATION EQUIPMENT (SHENZHEN) Co Ltd
Priority date: 2007-09-28
Filing date: 2007-09-28
Publication date: 2008-10-22
Anticipated expiration: 2017-09-28

Abstract

The utility model relates to an artificial limb knee joint structure, which comprises a lower leg support bracket body (3), a knee joint seat body (4), an interlocking device (5) and a buffer device (6). The interlocking device (5) comprises an interlocking rod (51), an actuating rod (52) and a vertical elastic device (53) which is arranged in the lower leg support bracket body and can be pressed through the actuating rod; the buffer device (6) comprises a buffer rod (61) and a buffer component (62), the upper ends of the actuating rod and the buffer rod are hinged into a right-turned-V shaped connecting bar structure, the buffer component is penetrated through the lower leg support bracket body in a slant direction and comprises a compression rod (621) and a buffer spring (623) at the rear part thereof, the rear end of the spring is limited and the front end is tightly propped against the compression rod, the compression rod passes through the lower leg support bracket body to contact with the buffer rod and is arranged at the rotating path thereof, and the axial alternating movement of the compression rod is performed along with the rotating thereof. Good shock-absorbing buffer effect can be achieved by the structure when people walk downhill; the structure is compact and closer to the human body nature joint; the shock-absorbing effect can be adjusted by further adopting an adjusting screw (622).

Description

A kind of artifucial limb knee joint structure

Technical field

This utility model relates to a kind of knee joint structure of artifucial limb, a kind of providing in knee joint one predefined curved angle particularly is provided absorbs the kneed shock sucking structure that impacts strength.

Background technology

Present medical science prosperity, the medical skill progress is maked rapid progress, not only on medical effect, keep on improving, and how helpful require on the work of rehabilitation after treatment especially, wherein, advance fast especially for the use of auxiliary healthy effect with artifucial limb again, it is to keep outside the valuable life the person of being hurt, another kind of auxiliaring effect is provided again, for example, lacks the disabled of lower limb for amputation, aspect body and mind, received severe trauma, and walking disorder can't be autonomous serious blow under, can not only increase the autonomy and the convenience of action by the installing artifucial limb, can remedy outward appearance U.S. of human body integral again, more can set up disabled's self-confidence, therefore artifucial limb auxiliary located that and changed very important rehabilitation aid into, and this kind shank artifucial limb can be many positions, for example the artifucial limb knee joint position, be to use and accept the thigh knee up, ankle is accepted in the below, sole artifucial limb part, and the kneed structure of this kind artifucial limb developed and many forms, and its pluses and minuses are respectively arranged.

Existing a kind of artifucial limb knee joint structure on the market, as shown in Figure 1, knee joint structure for the U.S. " CENTURYXXII INNOVATIONS INC. ", patient's thigh is accepted in its upper end, the lower end connects shank and foot, this structure provides a simulation knee-sprung effect with the combination of composite rod, following end link 11 is provided with a cushion block 13, when connecting rod 12 and connecting rod 11 are positioned at the direction of straight line deflection, for example knee joint is stretched and is landed and when being subjected to impulsive force, this connecting rod 11 can compress cushion block 13, and provide the effect of absorption along foot's direction impulsive force, yet on the whole the effect of its absorbing vibration is under foot and several straight states of knee joint, carry during for level walking that foot is shown and can provide the effect of shock-absorbing when knee joint lands with nearly collinear angle, but when descending was walked, landing with the foot of natural walking states to become the situation of an angle and curved, and the shock-absorbing effect of this kind structure just can't produce the effect of shock-absorbing.

Another kind of existing artifucial limb knee joint structure 2 as shown in Figure 2 on the market, product for Germany " OTTOBOCK " company, use the combination of many connecting rods to provide a simulation knee-sprung effect, connect an oblique buffer bar 24 in first connecting rod 23 lower ends of upper end, this buffer bar 24 is connected with a cylindrical cushion 25, when the first connecting rod 21 of this knee joint structure 2 with a radian during to front curve, only the top is with four connecting rod mode start bendings, and when knee joint at the crooked of low-angle (about 15 degree in) and when being subjected to positive force along shank, be subjected to the impulsive force of forward when for example foot lands, second connecting rod 23 can act on and compress cushion 25 to buffer bar 24 towards the lower end, distortion by this cushion absorbs impulsive force, the state walking with similar human knee joint nature of descending when walking can be provided, promptly foot land and knee joint with angle and curved; Yet its incomplete part is the fixed in shape of this cushion 25, deformation force is unadjustable, be that this cushion 25 need wear an axostylus axostyle 251 in addition, and pass cushion 25 and extend a segment distance downwards, therefore make whole knee joint structure 2 for microscler and big, longer than the knee joint of human body, more unnatural, the design of artifucial limb should be simulated the joint action of human body as far as possible, and shape also should comparatively meet nature with the design direction of the shape size in human body natural joint.

Summary of the invention

Even the technical problems to be solved in the utility model provide a kind of when descending is walked (when knee joint still was an angle and curved when foot landed) still can obtain good shock-absorbing buffering effect and knee joint structure compactness, more near the artifucial limb knee joint of human body natural's joint shape size structure.

For solving the problems of the technologies described above, this utility model provides a kind of artifucial limb knee joint structure, comprise: one connects the shank supporting frame of calf downwards, an and knee joint pedestal that upwards connects thigh of top, one linkage, one buffer unit, it is characterized in that, described linkage comprises trace, operating bar and be installed in the intravital vertical elastic force apparatus of described shank bracing frame, this operating bar compresses vertical elastic force apparatus to obtain restoring force when start, described buffer unit comprises a buffer bar and buffering assembly, described trace upper end is hinged with the knee joint pedestal, lower end and described shank supporting frame are hinged, described operating bar upper end is hinged with the knee joint pedestal, lower end and described buffer bar upper end are hinged to the bar linkage structure of "＜" shape, the other end of buffer bar and shank supporting frame are hinged, described Buffer Unit is oblique to be arranged in the described shank supporting frame, it comprises the buffer spring at depression bar and rear thereof, described buffer spring rear end is limited, front end contacts on described depression bar, described depression bar passes described shank supporting frame and contacts on described buffer bar, and be positioned on the rotate path of buffer bar axially reciprocating along with the rotation of buffer bar.

Solve the problem of regulating the buffering shock-absorbing effect as required for further, but described Buffer Unit also comprises an adjustment screw for the spacing spinning in and out in buffer spring rear end.

Described depression bar longitudinal section is " T " font, heavy in section one end can make this depression bar be limited in the described shank supporting frame, described adjustment screw is provided with pillar near an end of buffer spring, and an end of the close buffer spring of described depression bar is provided with groove, described buffer spring one end is placed in the described groove, and the other end then is set on the described pillar.

Described Buffer Unit is two groups, lays respectively at the both sides of described shank supporting frame.

The top of described buffer bar is opened to both sides and is a pair of buffering wing, respectively corresponding described two depression bars; Described operating bar bottom is contained between two buffering wings, on each buffering wing respectively correspondence be provided with a pivoted hole, the pivot joint of the operating bar pivoted hole of described pivoted hole and operating bar bottom; Described shank supporting frame is provided with opening, and described buffer bar bottom is contained in this opening, and is articulated in the both sides of this opening.

Described vertical elastic force apparatus comprises piston, returning spring and the bottom bar that contacts successively together, and described piston upper end is passed the shank supporting frame and is positioned on the rotate path of operating bar.

Described piston is provided with groove near an end of returning spring, and described bottom bar is provided with joint pin near an end of returning spring, and described returning spring one end is stuck in the described groove, and the other end is sheathed on the described joint pin.

There is a start pole bottom of described operating bar to the bending of knee joint pedestal direction, and the lower surface of its vertical elastic force apparatus of conflicting is a circular arc.

The trace of described linkage is two, lays respectively at the both sides of knee joint pedestal and shank supporting frame.

Described knee joint pedestal is provided with link slot in the face of the direction of operating bar, and the top of described operating bar is placed in the described link slot, and is articulated in the both sides of described link slot.

The beneficial effects of the utility model are, by buffer bar and operating bar pivot joint, make the operating bar transmission defeat and push away this buffer bar rotation along the impact of shank, make buffer bar compress Buffer Unit on its rotate path, thereby realize good shock-absorbing buffering effect, at the built-in vertical elastic force apparatus of shank supporting frame, can when operating bar rotates, be compressed and produced buffering effect.Such knee joint structure not only can be realized the buffering of level walking, even on the down grade, knee joint still was one low-angle when crooked when promptly foot landed, and landed under this flexibility, still can obtain good buffering effect.And such knee joint structure is compact, can be not oversize, more near the human body natural joint, use more natural.

Further adopting the adjustment screw that the degree of being compressed of buffer spring is regulated in the technical scheme, thereby user can be regulated elastic force as required and obtain suitable buffering, shock-absorbing effect.

Description of drawings

Below in conjunction with the drawings and specific embodiments this utility model is further elaborated.

Fig. 1 is a kind of floor map of existing knee joint structure.

Fig. 2 is the floor map of another kind of existing knee joint structure.

Fig. 3 is the parts exploded perspective sketch map of this utility model preferred embodiment.

Fig. 4 is the cutaway view of this utility model preferred embodiment.

Fig. 5 is the local amplification view of Fig. 4.

3 shank supporting frames, 31 openings, 4 knee joint pedestals, 41 link slots

5 linkages, 51 traces, 52 operating bars, 521 start poles

522 operating bar pivoted holes, 53 vertical elastic force apparatus 531 pistons 5311 grooves

532 bottom bars, 5321 joint pins, 533 returning springs, 6 buffer units, 61 buffer bars

The 611 buffering wings, 612 pivoted holes, 62 Buffer Units, 621 depression bars

6211 grooves 622 are adjusted screw 6221 pillars 623 buffer springs

The specific embodiment

Shown in Fig. 3～5, this utility model mainly comprises: a shank supporting frame 3, a knee joint pedestal 4, a linkage 5, a buffer unit 6; Wherein, this shank supporting frame 3 is to be used to connect calf and to connect foot downwards; This knee joint pedestal 4 is upwards to connect thigh.

Described linkage 5 comprises two traces 51, an operating bar 52 and a vertical elastic force apparatus 53.Wherein said two traces 51 lay respectively at the both sides of shank supporting frame 3 and knee joint pedestal 4, connect shank supporting frame 3 and knee joint pedestal 4 rotationally with its two ends; Described knee joint pedestal 4 is provided with link slot 41 in the face of the direction of operating bar 52, the top of described operating bar 52 is placed in the described link slot 41, and be articulated in the both sides of described link slot, the bottom of described operating bar 52 is bent to form a start pole 521 to knee joint pedestal 4 directions, be used for conflicting piston 531 upper ends of vertical elastic force apparatus 53 produce shock-absorbing effect, start pole 521 lower surfaces are circular arc, and start pole lower end is provided with a pivoted hole 522.Described vertical elastic force apparatus 53 be installed in the above-mentioned shank supporting frame 3 axially, it includes a piston 531, a bottom bar 532, and between this piston 531 and bottom bar 532, insert and put a returning spring 533, described piston one end is provided with the groove 5311 of card returning spring, bottom bar one end is provided with the joint pin 5321 of sheathed returning spring, described piston 531 upper ends are passed shank supporting frame 3 and are positioned on the start pole 521 lower surface rotate paths of operating bar 52, piston is compressed along with the rotation of operating bar, and then the returning spring that compresses below it produces restoring force.

Described buffer unit 6 comprises a buffer bar 61 and two groups of Buffer Units 62.These buffer bar 61 tops are opened to both sides and are a pair of buffering wing 611, are equipped with corresponding pivoted hole 612 respectively, and described operating bar 52 bottoms are contained between two buffering wings 611, described pivoted hole 612 and above-mentioned operating bar pivoted hole 522 corresponding pivot joints; Described shank supporting frame 3 is provided with opening 31, and described buffer bar bottom is contained in this opening, and is articulated in the both sides of this opening, and described operating bar 52 and described buffer bar 61 are connected to the connecting rod structure that slightly is "＜" shape.

Described Buffer Unit 62 is two groups, and the oblique respectively both sides that are arranged in described shank supporting frame 3 are corresponding one by one with the buffering wing 611 of described buffer bar 61.Every group of Buffer Unit 62 includes depression bar 621, adjusts screw 622, and inserts and puts a buffer spring 623 between this depression bar 621 and adjustment screw 622.Described adjustment screw 622 is threaded with the shank supporting frame, and an end in the hole of Buffer Unit is held in shutoff, for buffer spring 623 rear ends spacing, but spinning in and out are to regulate the compressed degree of buffer spring; Described depression bar 621 longitudinal sections are " T " font, heavy in section one end can be limited in the described shank supporting frame 3, make depression bar be unlikely to deviate from fully the shank supporting frame, described adjustment screw 622 is provided with pillar 6221, and depression bar 621 is provided with groove 6211, described buffer spring 623 1 ends are placed in the described groove 6211, the other end then is set on the described pillar 6221, this depression bar 621 protrudes the buffering wing 611 that should buffer bar 61, and be positioned on the rotate path of the buffering wing, can be along with the rotation of buffer bar along self axially reciprocating, and then compression buffer spring and shock-absorbing.

See also Fig. 4, Fig. 5, when using knee joint structure of the present utility model walking, crooked this knee joint, its active force is the joint direction forward of staying with one's parents in order to make them happy, direction A as shown in Figure 5, even also this knee joint pedestal 4 rotates relatively forward, the trace 51 and the operating bar 52 of linkage 5 are produced relative rotation with knee joint pedestal 4, make start pole 521 compress vertical elastic force apparatus 53, and compress its returning spring 533, so that when stretching, knee joint help knee joint to stretch by the restoring force of this returning spring 533 again; And when foot lands, then can be in forward impact power along the shank effect along the shank direction, direction B as shown in Figure 5, push buffer bar 61 downwards through operating bar 52, make buffer bar direction C rotation as shown, the depression bar 621 inside (direction D as shown) that compresses Buffer Unit 62 compresses this buffer spring 623, obtains the buffered effect of shock-absorbing.Particularly when descending was walked, knee joint still was a low-angle bending when foot landed, and its impulsive force still can push away buffer bar 61 to pressing down through operating bar 52, and then pressed and to push away Buffer Unit 62, obtained buffered action effect.

In addition, by the screwing or screwing out of the adjustment screw 622 of this utility model Buffer Unit 62, can reach the elastic force of adjusting buffer spring 623 and obtain suitable buffering, shock-absorbing effect.

Claims

1, a kind of artifucial limb knee joint structure, comprise: one connects the shank supporting frame (3) of calf downwards, an and knee joint pedestal (4) that upwards connects thigh of top, one linkage (5), one buffer unit (6), it is characterized in that, described linkage (5) comprises trace (51), operating bar (52) and be installed in vertical elastic force apparatus (53) in the described shank supporting frame (3), this operating bar (52) compresses vertical elastic force apparatus (53) to obtain restoring force when start, described buffer unit (6) comprises a buffer bar (61) and buffering assembly (62), described trace (51) upper end is hinged with knee joint pedestal (4), lower end and described shank supporting frame (3) are hinged, described operating bar (52) upper end is hinged with knee joint pedestal (4), lower end and described buffer bar (61) upper end are hinged to the bar linkage structure of "＜" shape, the other end of buffer bar (61) and shank supporting frame (3) are hinged, described Buffer Unit (62) is oblique to be arranged in the described shank supporting frame (3), it comprises the buffer spring (623) at depression bar (621) and rear thereof, described buffer spring (623) rear end is limited, front end contacts on described depression bar (621), described depression bar (621) passes described shank supporting frame (3) and contacts on described buffer bar (612), and be positioned on the rotate path of buffer bar axially reciprocating along with the rotation of buffer bar.

2, artifucial limb knee joint structure according to claim 1, described Buffer Unit (62) also comprise one for buffer spring (623) but the adjustment screw (622) of the spacing spinning in and out in rear end.

3, artifucial limb knee joint structure according to claim 2, described depression bar (621) longitudinal section is " T " font, heavy in section one end can make this depression bar be limited in the described shank supporting frame (3), described adjustment screw (622) is provided with pillar (6221) near an end of buffer spring (623), and an end of the close buffer spring (623) of described depression bar (621) is provided with groove (6211), described buffer spring (623) one ends are placed in the described groove (6211), and the other end then is set on the described pillar (6221).

4, according to each described artifucial limb knee joint structure of claim 1～3, described Buffer Unit (62) is two groups, lays respectively at the both sides of described shank supporting frame (3).

5, artifucial limb knee joint structure according to claim 4, the top of described buffer bar (61) open to both sides and are a pair of buffering wing (611), respectively corresponding described two depression bars (621); Described operating bar (52) bottom is contained between two bufferings wings (611), on each buffering wing respectively correspondence be provided with a pivoted hole (612), described pivoted hole (612) articulates with the operating bar pivoted hole (522) of operating bar bottom; Described shank supporting frame (3) is provided with opening (31), and described buffer bar bottom is contained in this opening, and is articulated in the both sides of this opening.

6, according to the described artifucial limb knee joint structure of claim 1, described vertical elastic force apparatus (53) comprises piston (531), returning spring (533) and the bottom bar (532) that contacts successively together, and described piston (531) upper end is passed shank supporting frame (3) and is positioned on the rotate path of operating bar.

7, according to the described artifucial limb knee joint structure of claim 6, described piston (531) is provided with groove near an end of returning spring (533), described bottom bar (532) is provided with joint pin near an end of returning spring, and returning spring one end is stuck in the described groove, and the other end is sheathed on the described joint pin.

8, according to the described artifucial limb knee joint structure of claim 1, there is a start pole (521) bottom of described operating bar (52) to knee joint pedestal (4) direction bending, and its lower surface of conflicting vertical elastic force apparatus (53) is a circular arc.

9, artifucial limb knee joint structure according to claim 1, the trace (51) of described linkage (5) is two, lays respectively at the both sides of knee joint pedestal (4) and shank supporting frame (3).

10, artifucial limb knee joint structure according to claim 1, described knee joint pedestal (4) is provided with link slot (41) in the face of the direction of operating bar (52), the top of described operating bar (52) is placed in the described link slot (41), and is articulated in the both sides of described link slot.