SU1225566A1 - Prosthesis of lower extremity - Google Patents

Description

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The invention relates to medical technology, namely to prosthetics.

The aim of the invention is to create an elastic knee-up in the knee assembly during the support phase by using a lever-hinged parallelogram associated with the knee joint and the elastic energy recuperator and having electromagnetic control of the movement of its links by sensor signals placed in the foot.

FIG. Figure 1 shows the kinematic diagram of the lower limb prosthesis; in fig. 2 - device lock the knee joint, longitudinal section.

The lower limb prosthesis contains a sleeve 1 of the thigh with a cultivator (not shown) connected to the sleeve 2 of the lower leg through the knee joint 3 with a locking device located in the sleeve 2 of the lower leg, as well as the foot 4 pivotally connected to the sleeve 2 of the lower leg.

The locking device is made in the ide of the lever-hinged parallelogram, two opposite floating links 5 and 6 of which are located parallel to the axis of the sleeve 2 of the lower leg in the glass 7, which is installed in it with the possibility of movement. Two intermediate links 8 and 9 of the parallelogram are pivotally connected to one floating link 5, and to the other link 6 through rollers 10 and 11 installed in the holes of the floating link 6, Intermediate links 8 and 9 are spring-loaded using springs 12 and 13 relative to the floating link 5 and is pivotally connected by a link parallel to the floating links and the core 14 of the electromagnet 15 fixed to the floating link 6 of the parallelogram with the holes. The anchor 14 is spring-loaded by means of a spring 16 relative to the body of the electromagnet 15, which is connected through tactile sensors 17 and 18 placed in the foot 4, e by an electric pulse generator (not shown). An elastic energy recuperator 19 is installed between the cup 7 and the shank sleeve 2, and the floating link 5 of the parallelogram is connected with a thigh 20 with the knee joint 3.

The prosthesis works as follows

At the time of the forward push, when the invalid begins to step on the pro255662

It is triggered by a tactile sensor 18 mounted on the foot of the foot. It triggers electromagnet 15, measles 14 starts to pull 5 seconds into the electromagnet, which causes compression of spring 16. Mutual movement of rops 14 and electromagnet 15 causes movement of floating link 6 relative to intermediate links 8 and 9 and rolling out of rollers 10 and 11 from floating holes link 6. This leads to the transverse movement of the floating link 6 and pressing it and the floating link 5 to the walls

15 cups 7. Under the action of weight and forces arising from the movement of a disabled person, the hectare 20 tends to go down, the floating link 5 by means of intermediate links 8 and 9 seals the floating link 6 in the glass 7. The jamming is provided by the forces of friction arising between the cheeks of the floating links 5 and 6 and glass 7. This ensures the stability of the platform during the support phase. Upon further movement, the prosthesis flexes in the knee joint, the thrust of 20 moves down (the floating links 5 and 6 are not slipping 2 Q), the cup 7 also moves along with it, compressing the spring of the elastic recuperator 19 of energy. The bending is performed under the action of the total force of the weight of the disabled person and the dynamic forces that arise during his movement. Under the action of these forces, the prosthesis bends into the forward push phase. In the extension phase, roll through the foot and straighten the denture while discharging the heat exchanger at the same time is performed. In the rear TOJi4Ka phase, the load on the prosthesis gradually decreases, the tactile sensor 17, mounted on the toe of the foot, triggers, which gives the comag to turn on the generator of electric impulses, from which the pulses start to flow to the electromagnet 15. It is transmitted to the intermediate links 8 and 9, reducing the propping forces and frictional forces between the floating links 5 and 6, as well as between the rollers 10 and 11 and the floating link 6. Thus, in the transfer phase, when by force t nuische

t g 20 up, conditions are created for wedging the locking device35

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2017 / 4t yy

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VNVDPI State Committee of the USSR 11 and otkrgty 1 “-35. Raushsk nab .. d 4/5

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Production and printing

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Proofreader M.Samborska Subscription

Enterprise, Uzhgorod, Projecto st., 4

Claims (1)

LOWER EXTREMITY PROSTHESIS having a thigh sleeve with a stump receiver connected to the lower leg sleeve through a knee joint with a locking device located in the lower leg sleeve, as well as a foot pivotally connected to the lower leg sleeve, characterized in that, in order to create an elastic bending in the knee node in the support phase, the locking device is made in the form of a lever-hinge parallelogram, two opposite floating links of which are parallel to the axis of the calf sleeve in a glass mounted in it with the possibility of movement, We have two intermediate links of the parallelogram pivotally connected to one of the floating links, and to the other through the rollers installed in the holes of the floating link, the intermediate links are spring-loaded relative to the floating link and pivotally connected by a link parallel to the floating links and which is the anchor of the electromagnet mounted on the floating link of the parallelogram with holes, g while the anchor is spring-loaded relative to the body of the electromagnet, an elastic energy recuperator is installed between the glass and the sleeve of the lower leg, and the floating link the parallelogram is connected by a thrust to the knee joint, the electromagnet is connected through tactile sensors to an electric pulse generator. 1 1225566