RU2020902C1 - Talocrural unit - Google Patents

Abstract

FIELD: prosthesis manufacture and prosthetics. SUBSTANCE: talocrural unit has housing 1 of flexible airtight material, ankle, absorbers in toe, front, central and rear parts. Central absorber is flexible having poured bush 4 with thread and pins for fixation with crus. Cavities for compressed air there are in toe, front, central and rear parts of housing. Three last cavities are coupled with each other through openings to be overlapped at loads. Thread bush for nipples having housing 7, plug 8, tubular diaphragm 9 intended for pumping the air into them closing air outlet are poured in shells of toe cavity and front part. Flexible shells of cavities and central flexible absorber together with compressed air in cavities form absorbers with rigidity to be regulated owing to pressure of air pumped into cavity. EFFECT: improved reliability. 2 dwg

Description

 The invention relates to prosthetics and prosthetics.

 Known ankle assembly containing a housing made of elastic material, ankle, shock absorbers in the toe, front and rear parts of the body. The necessary stiffness of shock absorbers is provided by a set of shock absorbers of different stiffness.

 The disadvantage of this device is the small range and stepwise regulation of the stiffness of the shock absorbers.

 The purpose of the invention is to increase the ability to control the stiffness of shock absorbers.

 This goal is achieved by the fact that in the case of an elastic airtight material there is a central elastic shock absorber with an infused sleeve for fastening with a lower leg, which functions as an ankle with a flexible polycentric ankle joint, and in the nose, front, central and rear parts of the body there are cavities for compressed air, forming in combination with an elastic shell of cavities and with an elastic shock absorber in the central part, shock absorbers with adjustable stiffness due to the pressure injected into Lost air through the nipple.

 Figure 1 shows the ankle node; figure 2 - place I in figure 1.

 The ankle assembly contains a housing 1 of elastic airtight material with a central elastic shock absorber 2 and cavities: I in the toe, lI, III, IV, respectively, in the front, central and back (heel) parts. Cavities II, III, IV communicate with each other through openings 3. A sleeve 4 with a thread and two pins 5 is inserted into the shock absorber 2 for connection with the lower leg of the prosthesis (lower leg is not shown). In the shell of cavities I and II, bushings 6 are threaded under the nipples, containing a housing 7 with holes, a plug 8, a tubular diaphragm 9. In the shell of the housing 1 there are specified sections "a", "b" - in the toe, "c", " g "- in the front and rear parts," d "- in the sole of the back.

 Depending on the anthropometric data of the disabled person and the terrain, the stiffness of the toe shock absorbers (cavity I) and the front, central and rear parts (cavities II, III, IV) are separately regulated. For this, a disabled person pumps air into the cavity through nipples with a bicycle or other pump to such a pressure that provides the necessary stiffness of the shock absorbers.

 The ankle node works as follows. When walking a disabled person at the time of support on the heel, the front, central and rear shock absorbers are activated.

 In this case, the elastic shock absorber 2 is compressed and tilted back together with the body shell adjacent to it between sections “c”, “g” and sleeve 4, the sole of the heel in section “d” is bent upward, air is compressed in cavities II, III, IV, and at this moment, the exit from cavity IV is blocked through the compressed hole 3 and the stiffness of the rear shock absorber is maximum.

 When rolling from heel to toe at the time of vertical loading, the same shock absorbers are activated, while the elastic shock absorber 2 is compressed as much as possible, the adjacent shell and sleeve 4 are lowered, the air in the cavities II, III, IV is compressed, and the passage between the cavities is blocked and the total stiffness shock absorbers maximum.

 When resting on the sock, the shock absorbers of the sock, the front and central shock absorbers are triggered, while the shell of the sock bends upward in sections "a", "b", the elastic shock absorber 2 with the adjacent shell and sleeve 4 is compressed and bent forward, the air in the cavities I, II is compressed , III, and the exit from the cavity II is blocked and the stiffness of the front shock absorber is maximum. At the moment of the shock, the shock absorbers, unclenching, create additional thrust force.

 The advantages of the proposed site compared to the base are as follows: energy consumption and shock loads when walking a disabled person are reduced, the design is simplified, the weight is reduced and the reliability of the GSU is increased.

Claims (1)

 An ankle assembly comprising a body of elastic material, an ankle, shock absorbers in the nose, front and back, characterized in that the body of elastic airtight material contains a central elastic shock absorber with a threaded sleeve and two pins for fastening with the lower leg, and in the toe, cavities for compressed air are made in the front, central and rear parts of the body, the last three cavities communicating with each other through openings, and threaded bushings are poured into the shells of the toe cavities and the front part od nipple formed as a casing, wherein the plug is installed and the tubular diaphragm.

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