Posture-correcting and vision-correcting learning chair

Abstract

The invention provides a posture-correcting and vision-correcting learning chair which comprises a support frame and a chair back, a chair seat assembly and a spring, wherein the chair back is matchedwith the support frame through a spherical hinge; the chair seat assembly comprises a chair seat and a cushion, and the cushion and the chair seat are in spherical hinge fit; one end of the spring isconnected with the chair seat, and the other end is connected with the cushion. The design of spherical hinge matching is adopted between the chair backs, when the chair back is under the action of leaning external force, the chair back rotates along with the stress direction, the position of the chair back adapts to a human body, and fatigue and waist soreness are relieved; the cushion and the chair seat are designed through a spherical hinge, when the cushion is subjected to an external force, the cushion inclines to adapt to a human body, and unsmooth leg blood circulation and numbness inthe legs caused by extrusion between the cushion and the lower parts of the thighs are avoided; and due to the design that the ball head is fixed to a connecting rod and the groove is larger than thehemisphere, when the chair back rotates, the rotating angle of the chair back in any direction is controlled within 45 degrees, and the problem that balance is affected due to the fact that the rotating angle of the chair back is too large due to the fact that stress is too large is solved.

Description

technical field [0001] The invention relates to a seat, in particular to a learning chair for posture correction and vision correction. Background technique [0002] In existing learning chairs, the relationship between the cushion, the back of the chair and the human body is that people adapt to the cushion, the back of the chair. [0003] During use, there is a squeeze between the lower part of the thigh and the cushion, resulting in poor blood circulation in the legs and numbness in the legs. [0004] Because people adapt to the back of the chair, the back of the chair gives people a reaction force, and it is easy to cause waist pain and fatigue when leaning on it. Contents of the invention [0005] Aiming at the deficiencies of the prior art, the present invention provides a learning chair for correcting posture and correcting vision. By adopting the design of ball hinge cooperation between the back of the chair and the support frame, when the back of the chair is sub...

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