Lower limb sit assist device

Abstract

The invention discloses a lower limb sit assist device. The lower limb assist device comprises a left supporting leg and a right supporting leg. The structure of the left supporting leg is identical to that of the right supporting leg, and each supporting leg comprises a buffer device, a thigh skeleton, a shank skeleton, an angle adjusting device, a supporting rod, a supporting sliding frame and afoot bottom plate, wherein the angle adjusting device comprises a sliding rod, a press rod and a controllable spring; the buffer device comprises a seat cushion, a seat board, a leaf spring, a leaf spring sleeve and a tension spring. The device has the functions of helping sit and helping forward lean. When the device helps sit, the leaf springs can achieve a buffer effect. Through the cooperation of the press rods and pressure-relief contacts, the length of telescoping rods is adjusted to meet the most suitable sitting position. When the human body needs to lean forwards, the supporting sliding frames are moved forwards so as to increase the contact area with the ground, the gravity center of the human body can be slightly moved forwards, and the situation that a user falls down when leaning forwards is prevented. When the user leans forwards a certain angle, fan-shaped bosses make contact with the edges of third grooves to form mechanical limiting, in the forward lean process, the elastic force of the tension springs can provide a certain buffer, and the comfort of the human body is improved.

Description

technical field [0001] The invention relates to the field of exoskeleton booster devices, in particular to a lower limb sitting aid device. Background technique [0002] At present, doctors often need to maintain various postures for a long time due to different angles when performing operations, such as squatting and forward leaning postures, and because the existing chairs cannot meet this special requirement, doctors have to Standing for a long time, and an operation may last more than ten hours, the long-term operation makes it very easy to feel tired, and the efficiency is seriously reduced. [0003] The document with the application number 201810425010.8 discloses a mechanical leg without power to assist sitting. The mechanical leg has a hollow structure in the calf skeleton, and a straight track is installed in the hollow structure. When the human body squats, one end of the gas spring can slide in the straight track. And the length of the gas spring telescopic rod c...

AI Technical Summary

Problems solved by technology

[0002] At present, doctors often need to maintain various postures for a long time due to different angles when performing operations, such as squatting and forward leaning postures, and because the existing chairs cannot meet this special requirement, doctors have to Standing for a long time, and a surgery may last for more than ten hours, the long-term surgery makes it very easy to feel tired, and the efficiency is seriously reduced

[0003] The document with the application number 201810425010.8 discloses a mechanical leg without power to assist sitting. The mechanical leg has a hollow structure in the calf skeleton, and a straight track is installed in the hollow structure. When the human body squats, one end of the gas spring can slide in the straight track. And the length of the gas spring telescopic rod can be adjusted, but the gas spring of the mechanical leg is located at the lower leg frame, and the device for pressing the gas spring contact is relatively low, which is not only cumbersome to walk, but also needs to be bent down to press, which is extremely inconvenient. And this device does not consider the situation of the human body leaning forward

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