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Chair backrest

a backrest and ergonomic technology, applied in the field of ergonomic chair backrests, can solve the problems of inability to the elastic band ultimately loses its elasticity, and the prior mechanism cannot fit the waist of different sitting people, etc., and achieve the effect of great waist comfor

Inactive Publication Date: 2006-06-29
OASYSCHAIR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] The chair backrest according to the present invention comprises a vertical backrest support; an upper back unit formed of an elastomeric material and releasably secured to the backrest support; a waist unit including a front waist member formed of an elastomeric material, an intermediate frame, and a rear plate releasably secured to the backrest support, and a bent, resilient connecting member including a lower portion releasably secured to the waist member and the frame, and an upper portion releasably secured to the backrest support. By utilizing this chair backrest, in response to the waist of a seated person urged against the waist unit, the connecting member is elastically deformed so as to provide a great degree of comfort to the waist.

Problems solved by technology

However, such prior mechanisms cannot fit waists of different seated people.
However, such conventional art suffers from some disadvantages.
For example, elastic bands ultimately lose its elasticity.
Such conventional backrests are typically, relative complex in constructions and costly to manufacture.

Method used

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Examples

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Embodiment Construction

[0017] Referring to FIGS. 1 and 2, there is shown a chair backrest constructed in accordance with a preferred embodiment of the invention. The backrest comprises a waist unit 1, a bent, resilient connecting member 2, an upper back unit 3 and a substantially rectangular, vertical backrest support 4 and a plurality of fasteners 5 such as screws or the like.

[0018] The waist unit 1 includes a front waist member 11 formed of an elastomeric material, an intermediate, rectangular frame 12 having a plurality of locating holes 122 on its periphery and a plurality of apertures 121 in its upper, central portion, and a rear, rectangular plate 13 having a plurality of hollow locating cylinders 131 shaped to neatly insert into the locating holes 122 for fastening.

[0019] The upper back unit 3 includes a front backrest member 31 formed of an elastomeric material, and a curved rear portion 32 having a plurality of pegs (not shown) shaped to neatly insert into the locating cylinders 43.

[0020] The ...

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PUM

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Abstract

Provided is a two-sectional ergonomic chair backrest comprising a vertical backrest support, an upper back unit releasably secured to the backrest support, a waist unit including a front waist member, an intermediate frame, and a rear plate releasably secured to the backrest support, and a bent, resilient connecting member including a lower portion releasably secured to the waist member and the frame, and an upper portion releasably secured to the backrest support such that in response to the waist of a seated person urged against the waist unit, the connecting member is elastically deformed so as to provide a great degree of comfort to the waist.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of Invention [0002] The present invention relates to ergonomic chair backrests and more particularly to such a backrest consisting of two cooperative waist and back sections so as to bring a degree of comfort to, particularly the waist of a seated person. [0003] 2. Related Art [0004] A conventional chair backrest is a one-piece component. Also, most prior art ergonomic chair backrests emphasize the degree of comfort to the back of a seated person rather than the waist. A small number of prior art chair backrests incorporating a mechanism for bringing a degree of comfort to the waist of a seated person. However, such prior mechanisms cannot fit waists of different seated people. Thus, backrests with height-adjustable waist pads are developed, in which a waist pad is attached to a backrest of a chair by elastic bands. However, such conventional art suffers from some disadvantages. For example, elastic bands ultimately lose its elasticity. An...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A47C7/02
CPCA47C7/02A47C7/42
Inventor PAN, TOUNG-CHUN
Owner OASYSCHAIR
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