SU1757663A1 - Lower limb prosthesis - Google Patents

Abstract

Use: prosthetic lower limbs. Facilitation of prosthesis transfer by functional shortening of the prosthesis into the phase of transfer and fixation of the knee joint of the prosthesis hinge. SUMMARY OF THE INVENTION: The prosthesis comprises a cult-receiver 1, a metal sleeve, a knee joint assembly including an axis of the hinge, a fork, a gooseneck, an abutment screw and a compression spring mounted on the hinge panel, a shin tube, a foot with a foot-stop hinge and a locking device with manual control. The spring is placed between the fork and the hinge of the hinge with struts with a tilt angle of 14 ° C. from the vertical axis, located on the rear wall of the middle part of the plug and the lower part of the jib. 5 il.

Description

The invention relates to medical technology, namely to prosthetics of the lower limb.

A hip prosthesis containing a lock in the knee joint, a wooden cult-receiver, a shin tube, a lock dog connected to the knee-cup, a lock dog connected to a rod, a flange that is attached to the thigh sleeve, feet, polyurethane foam lining and fixture with catfish are known.

A disadvantage of the known prosthesis is its immobility in the knee joint when walking, which complicates the transfer of the prosthetic limb over the support, creates an overstrain in the healthy leg and leads to rapid prosthetics fatigue. The culture receptacle causes pain in the groin and trunk area.

These disadvantages are eliminated in the proposed design of the knee hinge assembly.

The purpose of the invention is to facilitate the bending of the prosthesis in the knee joint under the load of the prosthesis in the prosthetic support phase.

The prosthesis of the lower limb facilitates the transfer of the prosthesis by functional shortening of the prosthesis into the phase of transfer and fixation of the knee joint, which indicates that the criterion has a positive effect.

Figure 1 is a side view of the prosthesis in a straight-line position; Fig, 2 is a top view of the locking device of the prosthesis; Fig. 3 is a side view of the locking device of the prosthesis; Fig. 4 is a side view of the prosthesis at the moment of complete bending by 28 ° during movement; Fig. 5 is a side view of the prosthesis at the moment of complete bending by 90 ° while sitting.

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SP VJ O COO

WITH

The lower limb prosthesis contains (Fig. 1) cult-receivers 1 for placing a leg stump, installing fixtures and a locking rod 14, the flange of which is movably mounted on the spindle 15, a metal sleeve 2 for fastening the cult-receiver on it, placing it inside the locking device 11,12 and fasten the knee joint.

The knee joint assembly is assembled from a panel with a table 3 for mounting the parts of the hinge and the locking device, a fork 4 rotating on a central axis 6 and having arc bevels in the upper part for stopping the stopper 12 of the locking device and free entry of the upper fork in the notch 5. The middle part of the fork has a straight bevel with an inclination of 14 ° from the vertical axis for fixing the knee assembly when the prosthesis is bent and a notch is placed to place the spring 7. In the lower part of the fork there is a coupling sleeve for fastening the calf tube 9, jib 5, rotating on the central axis 6 and having in the upper end part of the arc bevel for the stop stop 12 of the locking device. In the middle part there is a cutout for installing the rubber damper 13 and setting the upper part of the plug 4. In the lower part of the jib there is a projection with a straight bevel with an inclination of 14 ° from the vertical axis for fixing the knee assembly when the prosthesis is bent. The back arc cut-out of the jib is necessary to accommodate the spring 7, a threaded hole is made in the tail section for screwing in and holding the spring 7, the central hinge axis, which connects the hip part with the knee hinge and the shin tube 9 with the foot and the ankle hinge 10 springs plate or screw 7, placed between the arc cut-outs of the plug 4 and the jib 5, designed to return the prosthesis to the rectilinear position after the end of the bend of the knee joint in the phase of the prosthesis transfer, Inta support 8, necessary to limit the movement of the plug 4 and the calf tube 9 with the feet 10; the calf tube 9, which serves to connect with the knee joint and the foot.

The ankle joint is designed to change the position of the foot when walking.

The locking device assembly (Fig. 2) is mounted on the table of the panel 3 of the knee hinge and placed inside the metal sleeve 2.

The locking assembly contains:

-metal tube 11 (FIG. 3), in which the bearing 23 is mounted for fixing the stopper 12 in a predetermined cycle, a helical spring 24 which extrudes

a part of the bearing sphere to hold the stopper 12 in a given cycle and a pin 25 to hold the spring in the tube 11,

a metal plate 26 on which the tube 11 is soldered to. The plate is attached with screws 22 (Fig. 2) to the table panel 3,

-stopper 12 (Fig. 1-5) for focusing it in the upper arc bevels of the plug 4 and the jib 5 in a given cycle. The stopper rotates on axis 16 together with a handle mounted on axis 16.

21, the tail part of the co Oura is connected by an axis 28 with the rod 14, the stopper in the end part is broadened to increase the contact of the area with the upper arc bevels of the fork 4 and the jib 5, as well as two spherical recesses for the bearing 23 to enter and fix the stopper in a given cycle,

- two metal struts 17 (Fig. 2) left and right, on which the axis of the locking device 16 rests. The stands are fixed

screws 22 on the panel table 3,

- there are 16 locking devices on which stops 19 are mounted left to right, separating washers 18, stopper 12 and handle 21,

The stops 19 left and right (Fig. 2) are set to reinforce the rigidity of the stop 12 when it is in the lower position. The stops in the lower part are mounted on the support screw 27 (FIG. 3),

- knob 21 for switching stopper 12 to a predetermined cycle. In the tail part of the handle is connected by an axis 28 with a rod 14 (figure 2 and C),

- rod 14, which is in the lower part of the fork for connection with the tail

part of the handle 21, in the upper part there is a flange with three internal cuts for translating and fixing the rod in a predetermined cycle and a spherical protrusion 29 for ease of use by the rod. Fixing barbell

This is accomplished with the aid of a spindle 15 with a capron washer, which is mounted on the cult-receiver 1 (FIG. 3).

The work of the prosthesis is carried out in three cycles:

The first cycle (figure 1). The rod 14 is installed in the lower position and fixed by the spindle 15.

When translating the rod simultaneously through the handle 21 (Fig. 3) is transferred to the bottom

the position of the stopper 12, which is mounted on one axis 16 of the locking device,

The stopper 12 (Fig. 1) rests on the upper arc parts of the plug 4 and the jib 5 and clamps

them in a fixed position. A stop screw 8 holds the plug 4 with the calf tube 9 with the foot 10 from moving forward. The spring 7 is in the expanded state.

The hip part with the knee joint assembly, connected to the central axis 6 with the drumstick-tube 9 and the foot 10, is rigidly on the same vertical line and makes up the entire prosthesis.

This cycle involves the limited walking and carrying out of the production process in the workplace and the movement around it.

The second cycle (figure 4). The rod 14 is moved to the middle position and is fixed by the spindle 15.

When translating the rod, simultaneously through the handle 21 (Fig. 3), the stopper 12 is moved to the middle position, which are fitted onto one axis 16 of the locking device.

The stopper 12 (Fig. 4) rests only in the upper arc part of the jib 5. The fork 4 with the lower leg 9 and the foot 10 is in the free position, but still the fork 4 rests on the screw of the stop 8 and is pressed against the screw of the stop 8 by the spring 7, Fig. one.

At the time of the onset of the knee joint, the assembly of the knee joint is fully extended under the influence of the compression spring 7 installed between the rear notch of the jib 5 and the lower notch of the fork 4.

At the beginning of the reference time of the transition step from the pt to the entire foot (Fig. 4) under the influence of the longitudinal load on the prosthesis, the line of action of which passes posteriorly from the axis 6 of the knee joint, the hip portion with the knee joint and the fork 4 with the tibia 9 and the foot 10, moving together on axis 6, the knee of the prosthesis is pushed up to 28 °.

The limitation (fixation) of bending the prosthetic knee is performed by approaching in the middle part of the plug 4 of the direct strut with a slope of 14 ° from the vertical axis and the protruding straight strap of the lower part of the jib 5 with a slope of 14 ° from the vertical axis .

When the hip part and the lower leg are bent with a foot, the spring 7, squeezing between fork 4 and the jib 5, accumulates potential energy in itself (figure 4).

The accumulated energy in the spring 7 is released into the final phase of reliance on the entire foot, contributing to the extension of the prosthesis. By this time, the roll on the entire foot is completed, the heel of which detaches from the supporting surface on the toe of the foot (Fig. 4).

In the subsequent movement, the cycle repeats again with the frequency of double steps.

The third cycle (figure 5). The rod 14 is moved to the upper position and fixed

spindle 15.

When translating the rod, simultaneously through the handle 21 (Fig. 3), the stopper 12 is moved to the upper position, which are mounted on one axis 16 of the locking device. In that

The moment the stopper 12 releases the upper arc part of the plug 4 and the upper end arc part of the jib 5 and, pressed by the spring 7, rotate freely on the central axis 6 of the knee joint.

The hip part and the shin with the feet are bent on the axis 6 by 90 ° for a sitting position.

This design of the prosthesis makes it possible to use it with different lengths.

stump, limited bending of the knee hinge to 28 ° under load in the first half of the reference time with simultaneous accumulation of potential energy in the compression spring, which ensures straightening of the knee of the prosthesis after completion of the roll across the foot from heel to toe when walking, bending the prosthesis on 90 ° to sit and create stiffness (immobility) of the prosthesis.

The lining (cosmetics) of the prosthesis is performed without the protrusions of individual components and parts and makes it possible to make it according to the volume of a healthy leg in an aesthetic sense.

Manual control reliably fixes three cycles of the prosthesis: the rigidity of the prosthesis, bending it up to 28 ° when walking, free bend by 90 ° for sitting.

The design of the prosthesis helps to reduce fatigue when walking brings it closer to the natural and does not disfigure the figure, relieves pain in the groin area and one-year old at the time of contact of the nose

feet with support surface.

Claims (1)

Invention Formula A prosthesis of the lower limb, containing a cult-receiver, a metal sleeve, a shin tube, a foot with an ankle joint, a manually operated locking device, a knee hinge assembly, made in the form of a hinge axis, a fork, a jib, a stop screw, and a compression spring, mounted on a hinge panel, characterized in that, in order to facilitate the transfer of the body by the functional shortening of the prosthesis into the phase of transfer and fixation of the knee hinge assembly, in it a spring is placed between the fork and the ball joint on the back wall of the middle part of the fork and pa having struts disposed bottom of the jib, // fill Fig1  Cf. -C. with U-UU Јt / V W (Tt.Q g rtCxS J-u tyu./ go with D to rУ r $ four fci w Ј.Ј cycle.  A.c- “fc. fyu tyzef &. / s) Cpcmdt g GrnttitnJtdkBLtlffsTpO. fMc jit-trn toyf & uf. FIG 4 at 4 v " Fi & .5