Back cushion with adjustable waist support surface

Abstract

The invention relates to a back cushion with capacity of adjusting the shape of a waist support surface randomly. A targeted support curved surface can be obtained by adjusting the shape of the support surface of the back cushion in reference to the standard sitting posture of a user; the shape of the support surface is fitted with the waist curve of each user, and uniform and powerful support can be provided for the waist, so that the functions of keeping the sitting posture and relieving fatigue are realized.

Description

technical field [0001] The invention relates to a back cushion whose shape of a lumbar support surface can be adjusted arbitrarily. By adjusting the support surface of the back cushion, the back cushion is closely fitted to the waist of the user, and the force on the waist is more uniform, so as to maintain the sitting posture and relieve fatigue. Background technique [0002] At present, there are three types of lumbar cushions: one is the filling type, the cushion cover is made of flexible fabric, and the inside is filled with down, crushed sponge, cotton, PP cotton, etc. Its advantages are various shapes, low cost, and is suitable for production. The disadvantage is the filling. The material is soft and loosely combined with each other. The support provided by the cushion is not enough, which not only cannot relieve fatigue, but even makes the lumbar spine more unreasonable and damages the health. Its advantage is that after the elastic material is compressed, the suppor...

AI Technical Summary

Problems solved by technology

[0002] At present, there are three types of lumbar cushions: one is the filling type, the cushion cover is made of flexible fabric, and the inside is filled with down, crushed sponge, cotton, PP cotton, etc. Its advantages are various shapes, low cost, and is suitable for production. The disadvantage is the filling. The material is soft and loosely combined with each other. The support provided by the cushion is not enough, which not only cannot relieve fatigue, but even makes the lumbar spine more unreasonable and damages the health. Its advantage is that after the elastic material is compressed, the support surface can fully contact with the waist of the human body, providing greater support force. The disadvantage is that the human body compresses the elastic material differently, and the support force fed back by the cushion is uneven. The user's waist cannot be fully relaxed, and it is prone to fatigue after long-term use; the third is the split support type, the part where the back cushion contacts the waist of the human body is a curved supporting plate made of hard material, and the supporting plate is connected to the bottom plate through a spring or spring sheet

Its advantage is that it has a certain support force and can adapt to the change of the seat back angle. The disadvantage is that the curved surface shape is fixed. For people of different heights and shapes, it cannot fully adapt to the physiological curve of the waist, resulting in uneven support force and poor use effect. it is good

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