CN106333772B - Elasticity is gone down on one's knees type lower limb knee joint artificial limb - Google Patents

Abstract

The lower limb knee joint prosthesis of the present invention comprises a residual limb socket connecting piece, a prosthetic foot connecting piece, a front side rod, a rear side rod, a damping cylinder and an elastic knee-bending part, and the front and rear ends of the residual limb socket connecting piece are connected with the front side rod respectively. Hinged with the upper end of the rear side rod: the front end of the prosthetic foot connector is hinged with the lower end of the front side rod; the elastic knee part is fixed on the prosthetic foot connector, which can exert elastic force on the rear side rod, and the elastic knee part includes sliding blocks and Elastic buffering device, the sliding block is fixed on the prosthetic foot connector, a sliding groove is arranged on the sliding block, the shaft hinged on the lower end of the rear side rod can slide in the sliding groove, and the lower end of the rear side rod is elastically connected to the elastic buffering device. Contact; the base end of the damping cylinder is hinged to the prosthetic foot connector, and the cylinder rod protruding from the damping cylinder is hinged to the residual limb socket connector. The lower limb knee prosthesis can achieve elastic knee flexion and is used for functional compensation of lower limb amputee patients, the gait is closer to the natural gait, and the subsequent damage is also greatly reduced.

Description

Elastic knee joint prosthesis

technical field

The invention relates to a lower limb knee joint prosthesis, in particular to a lower limb knee joint prosthesis capable of realizing elastic knee flexion, which belongs to the technical field of population and health.

Background technique

At present, the disabled account for about 5% of the population in our country, and there are about 8.77 million people with physical disabilities, accounting for 14.6% of the total number of disabled people. Nearly 1 million people need to install artificial limbs. In the lower limb prosthesis system, the knee joint is the most important component, and its performance directly affects the overall performance of the knee prosthesis.

For patients with lower limb amputations, the purpose of installing prostheses is not only to compensate for walking function, but more importantly, to simulate normal human joint movement in order to achieve the most natural gait. When you look closely at your natural gait, you notice the following phenomenon: When the heel touches the ground, the human knee bends slightly.

At present, the more commonly used knee prosthesis is the multi-axis linkage knee prosthesis. The multi-axis linkage knee prosthesis is widely used because it has the advantages of approximately simulating the motion of the normal knee joint, good stability, and high cost performance.

However, in the current multi-axis linkage type knee joint prosthesis products and technologies, the elastic knee flexion function is not or cannot be better realized.

Contents of the invention

The object of the present invention is to provide an elastic knee joint prosthesis, which can overcome some or some defects of the prior art.

According to the lower limb knee joint prosthesis of the present invention, it can realize elastic knee flexion and be used for functional compensation of lower limb amputee patients, wherein the lower limb knee joint prosthesis includes a residual limb socket connector, a prosthetic foot connector, a front side rod, a rear side Rods, damping cylinders and elastic knees,

Wherein, the front and rear ends of the socket connector of the residual limb are respectively hinged with the upper ends of the front side rod and the rear side rod;

The front end of the prosthetic foot connector is hinged to the lower end of the front side rod;

The elastic knee part is fixed on the prosthetic foot connector, and can apply elastic force to the rear side bar. The elastic knee part includes a sliding block and an elastic buffer device, wherein the sliding block is fixed on the prosthetic foot connecting part, and the sliding block is arranged on the There is a sliding groove, the shaft hinged on the lower end of the rear side rod can slide in the sliding groove of the sliding block, and the lower end of the rear side rod is in elastic contact with the elastic buffer device; and

The base end of the damping cylinder is hinged with the connecting piece of the prosthetic foot, and the cylinder rod protruding from the damping cylinder is hinged with the connecting piece of the receptacle of the residual limb.

According to the lower limb knee joint prosthesis of the present invention, after the patient's heel hits the ground, the lower limb knee joint prosthesis can be bent in a moderately elastic manner like a normal knee, the patient can walk easily, the safety of the knee joint is improved, and the gait is smoother. Close to natural gait, also greatly reduce subsequent damage.

In a specific embodiment of the present invention, the elastic buffer device includes a base, a top block, a sliding sleeve, a spring and an adjustment block, wherein the base is fixed on the prosthetic foot connector, the sliding sleeve is fixed on the upper part of the inner cavity of the base, and the top block It can slide up and down in the sliding sleeve, and by adjusting the adjustment block, the relative position between the adjustment block and the base can be adjusted. The spring is compressed between the top block and the adjustment block. And apply elastic force to the rear side bar. By having the elastic buffer device with such a structure, the lower limb knee joint prosthesis of the present invention can realize the function of elastic knee flexion of the present invention with a relatively simple structure.

In a preferred embodiment of the present invention, the adjustment block and the base are connected by threads, and a hole that can rotate the adjustment block to adjust the position of the adjustment block relative to the base is provided on the circumference of the adjustment block. By turning the hole on the adjustment block and rotating the adjustment block, the pre-compression amount of the spring can be adjusted, so as to meet the requirements of different patients on the elastic knee strength.

According to a specific embodiment of the present invention, the sliding groove on the sliding block of the elastic knee part can be set as a linear groove. In addition, the sliding groove on the sliding block of the elastic knee part can also be set as a curved groove.

According to the lower limb knee joint prosthesis of the present invention, a buffer block for reducing the movement impact of the residual limb socket connection part and the front side rod can be installed on the socket connection part of the residual limb. In addition, the prosthetic foot connecting part can be installed with a buffer block for reducing the movement impact of the prosthetic foot connecting part and the rear side bar. With the help of these bumpers, the movement shocks present in sports can be reduced, which further increases safety.

The present invention also relates to a lower limb knee joint prosthesis, in particular a lower limb knee joint prosthesis capable of elastically bending the knee, which is used for functional compensation of lower limb amputee patients, wherein the elastic knee bending type lower limb knee joint prosthesis is received by the residual limb Cavity connecting piece, prosthetic foot connecting piece, front side rod, rear side rod, damping cylinder, elastic knee bending part; the front and rear ends of the residual limb receiving cavity connection part are respectively connected with the front side rod and rear side rod through the shaft and the bushing. The upper end is hinged, the front end of the prosthetic foot connector is hinged with the lower end of the front side rod through the shaft and the bushing, the elastic knee part is fixed on the prosthetic foot connector, and the shaft hinged on the lower end of the rear side rod can be placed on the sliding block of the elastic knee part sliding in the groove; the base end of the damping cylinder is hinged with the connecting piece of the prosthetic foot, and the protruding cylinder rod is hinged with the connecting piece of the socket of the residual limb; the elastic knee part of the elastic knee joint prosthesis includes a sliding block and an elastic Buffer device; the sliding block of the elastic knee part is fixed on the connecting part of the artificial foot, and a sliding groove is arranged on it; the elastic buffering device is composed of a base, a top block, a sliding sleeve, a spring and an adjusting block, and the base is fixed on the connecting part of the artificial foot On the top, the sliding sleeve is fixed on the upper part of the inner cavity of the base, the top block slides up and down in the sliding sleeve, the adjustment block is screwed with the base, and the circumference of the adjustment block is provided with a round hole that can rotate the adjustment block to adjust the position of the adjustment block relative to the base , the spring is compressed between the top block and the adjustment block.

Compared with the prior art, the advantages and positive effects of the present invention at least include:

1. The elastic knee flexion function enables the knee joint prosthesis to bend to a maximum position of 15° in a moderately elastic manner like a normal knee after the knee joint prosthesis touches the heel. The patient can walk easily, and the safety of the knee joint prosthesis is improved.

2. Enable patients to walk more freely on uneven roads and gentle slopes.

3. The gait will look smoother and more natural.

4. Wear elastic knee-bending prostheses, because the physiological movements are more normal, and the pressure on the residual limbs, hip joints and spine is relieved at the same time, which greatly reduces subsequent damage.

5. Wear elastic knee-bending prostheses, and it is not easy to get tired when standing for a long time.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the exploded view of overall structure of the present invention;

Fig. 3 is a partial sectional view of the side view of Fig. 1;

Fig. 4 is a schematic diagram of the connection between the present invention and the residual limb socket and prosthetic foot;

Fig. 5 is the state schematic diagram of the swing period in the walking gait of the present invention;

Fig. 6 is a schematic diagram of the state when the heel touches the ground in the walking gait of the present invention;

Fig. 7 is another embodiment of the elastic knee part of the present invention.

Detailed ways

The elastic knee-bending type lower limb knee joint prosthesis of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Fig. 1, Fig. 2 and Fig. 3, the elastic knee joint prosthesis P (Fig. 4) generally includes the residual limb socket connector 1, the prosthetic foot connector 2, the front side rod 3, and the rear side rod 4 , damping cylinder 5 and elastic knee part 6. The front end of the residual limb socket connector 1 is hinged to the upper end of the front rod 3 through the shaft 31 and the sleeve 32, and the rear end of the residual limb socket connector 1 is hinged to the upper end of the rear rod 4 through the shaft 43 and the sleeve 44 . The front end of the prosthetic foot connector 2 is hinged with the lower end of the front side rod 3 through the shaft 33 and the axle sleeve 34, and the elastic knee part 6 is fixed on the prosthetic foot connector 2. The shaft 41 hinged on the lower end of the rear side bar 4 through the shaft sleeve 42 can slide in the groove (or sliding groove) 601a of the sliding block 601 of the elastic knee part 6 . The base end of the cylinder body 501 of the damping cylinder 5 is hinged with the prosthetic foot connector 2 , and the cylinder rod 502 protruding from the cylinder body 501 is hinged with the residual limb socket connector 1 through the shaft 51 and the axle sleeve 52 . The human body controls the movement of the knee joint through the muscles that cross the knee joint. In essence, the muscle force generated by many muscles will eventually reflect an overall control mode in the form of torque. The present invention can provide a suitable knee joint moment by means of the damping cylinder 5 to help the amputee achieve a good gait, thereby effectively controlling the knee joint prosthesis P of the elastic knee-bending type when performing transitions such as knee-bending, swinging, or standing. Stability, which makes the movement smooth and less prone to fatigue when standing for a long time, thus greatly providing the safety of the lower limb knee prosthesis.

Specifically as shown in Fig. 2 and Fig. 3, the elastic knee part 6 of the elastic knee joint prosthesis P of the lower limbs P generally includes a sliding block 601 and an elastic buffer device. The sliding block 601 of the elastic knee part 6 is fixed on the prosthetic foot connector 2, and the sliding block 601 is provided with a sliding groove 601a. The elastic buffer device includes a base 606 , a top block 602 , a sliding sleeve 603 , a spring 604 and an adjustment block 605 . The base 606 is fixed on the prosthetic foot connector 2, the sliding sleeve 603 is fixed on the top of the inner chamber of the base 606, the top block 602 slides up and down in the sliding sleeve 603, and the adjustment block 605 and the base 606 are connected by threads. A circular hole 605a is provided on the circumference of the adjustment block 605 to rotate the adjustment block 605 to adjust the position of the adjustment block 605 relative to the base 606 , and the spring 604 is compressed between the top block 602 and the adjustment block 605 .

As shown in Figure 6, the sliding groove 601a on the sliding block 601 of the elastic knee part 6 is set to a linear groove, and the shaft 41 hinged on the lower end of the rear side bar 4 through the axle sleeve 42 can be placed on the sliding block 601 of the elastic knee part 6. sliding in the linear groove 601a.

As shown in Figure 7, the sliding groove 601b on the sliding block 601 of the elastic knee part 6 is set as a curved groove, and the shaft 41 hinged on the lower end of the rear side bar 4 through the axle sleeve 42 can be placed on the sliding block 601 of the elastic knee part 6. sliding in the curved groove 601b.

As shown in FIG. 3 , a buffer block 11 for reducing the movement impact between the residual limb socket connector 1 and the front side rod 3 is installed on the residual limb socket connector 1 . When the elastic knee-bending type lower limb knee joint prosthesis P is converted from the heel-grounded state as shown in Figure 7 to the standing state as shown in Figure 3, the upper surface 3a of the bump that is provided on the front side bar 3 contacts the bottom of the buffer block 11. The lower surface 11a reduces the impact of the elastic knee joint prosthesis P during movement.

As further shown in FIG. 3 , the prosthetic foot connector 2 is equipped with a buffer block 21 for reducing the movement impact between the prosthetic foot connector 2 and the rear side bar 4 . When the elastic knee-bending type lower limb knee joint prosthesis P was in the swing phase as shown in FIG. 5 to the elastic knee-bending state (heel touches the ground) as shown in FIG. The lower surface 21a reduces the impact of the elastic knee joint prosthesis P during movement.

Both the buffer block 11 and the buffer block 21 are made of elastic plastic material, such as rubber or polyurethane.

The action principle and process of the elastic knee-bending lower limb knee joint prosthesis P of the present invention will be described below.

As shown in Figure 4, the elastic knee joint prosthesis P of the lower limbs of the present invention is connected to the socket H through the residual limb socket connector 1, and at the same time, connected to the prosthetic foot connecting rod K01 and the prosthetic foot K through the prosthetic foot connector 2 .

When the toes touch the ground, the elastic knee joint prosthesis P will be affected by the driving force F2 of the hip joint and the reaction force R2 of the ground to the toes. This pair of forces acts on the elastic knee joint prosthesis P, so that The joints of the prosthesis are bent (as shown in Figure 5), which drives the movement of the entire lower limb prosthesis to achieve the purpose of walking.

In the embodiment shown in Fig. 4 and Fig. 6, when the heel touches the ground, the elastic knee joint prosthesis P of the knee joint of the lower limb will be affected by the driving force F1 of the hip joint and the reaction force R1 of the ground to the heel, and the rear side The rod 4 exerts a force on the shaft 41 under the action of this pair of active forces, and the two ends of the shaft 41 slide to the lower end of the linear groove 601a in the linear groove 601a on the sliding block 601; 601a under the limitation of sliding, moves according to a certain trajectory, driving the knee joint prosthesis P to bend. When the rear side bar 4 moves according to a certain track, the top block 602 of the elastic knee-bending part will apply an upward force to the rear side bar 4 under the action of the spring 604, and the active force will change under the action of the spring 604 . In this way, when the heel touches the ground, the prosthetic joint will realize the elastic knee flexion function.

At the same time, by turning the round hole 605a on the adjustment block 605 to rotate the adjustment block 605, the pre-compression amount of the spring 604 is adjusted, so as to meet the requirements of different patients on the elastic knee strength.

In the embodiment shown in Fig. 4 and Fig. 7, when the heel touches the ground, the elastic knee joint prosthesis P of the knee joint of the lower limb will be affected by the driving force F1 of the hip joint and the reaction force R1 of the ground to the heel. The rod 4 exerts a force on the shaft 41 under the action of this pair of active forces, and the two ends of the shaft 41 slide to the lower end of the curved groove 601b in the curved groove 601b on the sliding block 601; 601b under the limitation of sliding, moves according to a certain trajectory, driving the knee joint prosthesis P to bend. When the rear side bar 4 moves according to a certain track, the top block 602 of the elastic knee-bending part will apply an upward force to the rear side bar 4 under the action of the spring 604, and the active force will change under the action of the spring 604 . In this way, when the heel touches the ground, the prosthetic joint will realize the elastic knee flexion function.

It should be understood by those skilled in the art that the above illustrations and embodiments are only used to explain the present invention and not to limit it in any way. For example, the elastic buffer device is not limited to the structure shown in the figure, as long as the elastic buffer device can apply elastic force to the lower end of the rear side bar.

Claims (6)

1. a kind of lower limb knee joint artificial limb can realize that elasticity is gone down on one's knees and for the functional compensation of lower limb amputation patient, spy Sign is, the lower limb knee joint artificial limb include stump socket connector, prosthetic foot connector, antero-lateral rod, postero lateral arm, damped cylinder and Elasticity is gone down on one's knees part,

Wherein, the rear and front end of stump socket connector is hinged with the upper end of antero-lateral rod and postero lateral arm respectively；

The front end of prosthetic foot connector and the lower end of antero-lateral rod are hinged；

Elasticity is gone down on one's knees and is partly fixed on prosthetic foot connector, and can apply elastic acting force to postero lateral arm, which go down on one's knees Part includes sliding shoe and elastic buffering mechanism, and wherein sliding shoe is fixed on prosthetic foot connector, and cunning is provided on sliding shoe Dynamic slot, the axis being articulated on the lower end of postero lateral arm can slide in the sliding groove of sliding shoe, and the lower end of postero lateral arm and bullet Property buffer unit Elastic Contact；And

The base end of damped cylinder is hinged with prosthetic foot connector, and the cylinder rod stretched out from damped cylinder and stump socket connector are hinged；

Wherein, elastic buffering mechanism includes pedestal, jacking block, sliding sleeve, spring and adjustment block, and wherein pedestal is fixed on prosthetic foot connector On, sliding sleeve is fixed on the top of the inner cavity of pedestal, and jacking block can slide up and down in sliding sleeve, and by adjusting adjustment block, energy The relative position between adjustment block and pedestal is enough adjusted, spring is compressed between jacking block and adjustment block, elastic part of going down on one's knees Jacking block by the spring effect, and to postero lateral arm apply elastic acting force.

2. lower limb knee joint artificial limb as described in claim 1, which is characterized in that carried out using screw thread between adjustment block and pedestal Connection, and it is circumferentially provided with the hole that can rotate adjustment block to adjust adjustment block relative to position base in adjustment block.

3. lower limb knee joint artificial limb as described in claim 1, which is characterized in that the sliding on the sliding shoe of elastic part of going down on one's knees Slot is set as straight-line groove.

4. lower limb knee joint artificial limb as described in claim 1, which is characterized in that the sliding on the sliding shoe of elastic part of going down on one's knees Slot is set as curved groove.

5. lower limb knee joint artificial limb as described in claim 1, which is characterized in that be equipped with and be used on stump socket connector Reduce the buffer stopper of stump socket connector and antero-lateral rod elliptical gear.

6. lower limb knee joint artificial limb as described in claim 1, which is characterized in that be equipped on prosthetic foot connector for reducing vacation The buffer stopper of foot connector and postero lateral arm elliptical gear.