Chair seat and back structure

Abstract

A chair seat and back structure includes a loop-shaped part with a space encompassed by an inner edge thereof, and an elastic covering part; the loop-shaped part has a curvature and a loop-shaped holding groove near to a circumferential edge thereof; the covering part positioned over the loop-shaped part, in tension and with a circumferential edge thereof being passed into the loop-shaped holding groove and secured to the loop-shaped part; therefore, the covering part will be changed in the shape by the sitter's body curvature, and the sitter's body will touch the chair with increased area.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a chair seat and back structure, more particularly one, which makes the chair more comfortable to sit on. [0003] 2. Brief Description of the Prior Art [0004] In order for allowing people to sit on chairs for a long period of time, chair seats and backs are usually formed with convexities and concavities according to ergonomics. [0005] Referring to FIGS. 1 and 2, a currently existing chair seat and back structure includes a board-shaped basic part 41, a foam part 42, and a piece of cloth 43. The board-shaped basic part 41 has a proper curvature, and it can be plastic or alternatively it can be wooden. The foam part 42 is stuck on the board-shaped basic part 41, and the cloth 43 is stuck on the foam part 42 and secured to the board-shaped basic part 41. [0006] The chair seat and back structure is found to have the following disadvantages: [0007] 1. When a person is seated on the chair,...

AI Technical Summary

Benefits of technology

[0010] It is a main object of the present invention to provide an improvement on a chair seat and back structure to overcome the above-mentioned problems. The seat and back structure of the invention includes a loop-shaped part with a space encompassed by an inner edge, and an elastic covering part. The loop-shaped part has a curvature and a loop-shaped holding groove near to a circumferential edge thereof. The covering part is positioned over the loop-shaped part, in tension and with a circumferential edge thereof being passed into the loop-shaped holding groove and secured to the loop-shaped part. Therefore, the covering part will be changed in the shape by the sitter's body curvature, and the sitter will be comfortably supported on the chair, with his body touching the seat and back structure with increased area.

Problems solved by technology

Consequently, the sitter will have bad blood circulation and feel numbness and pain after having been seated on the chair for a long period of time.

The sitter will feel hot and uncomfortable after having been seated on the chair for an extended period of time because air can't travel through the seat and the back.

It will take relatively much time and labor to make the board-shaped basic part curve smoothly if the board-shaped basic part is wooden.

Furthermore, wooden materials are relatively expensive.

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