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Multi-stage backrest assembly

a backrest and multi-stage technology, applied in the direction of chairs, movable seats, transportation and packaging, etc., can solve the problem of user easily feeling uncomfortable when sitting on the chair, and achieve the effect of enhancing the support effect of the waist suppor

Active Publication Date: 2005-09-01
WU YAO CHUAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] The primary objective of the present invention is to provide a multi-stage backrest assembly having a pivotable function so as to fit the curve of the user's body ergonomically, thereby providing a comfortable effect to the user.
[0014] A further objective of the present invention is to provide a multi-stage backrest assembly, wherein when a user is rested on the backrest assembly, the back support supports the user's back, and the waist support supports the user's waist by the elastic effect of the elastic bar which provides a cushion force to the waist support so as to enhance the support effect of the waist support, so that the user feels more comfortable.

Problems solved by technology

A conventional backrest for a chair has a fixed structure that cannot be adjusted so as to fit the curve of a user's body ergonomically, so that the user easily feels uncomfortable when seated on the chair during a long period of time.

Method used

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Examples

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Embodiment Construction

[0023] Referring to the drawings and initially to FIGS. 1-4, a multi-stage backrest assembly for a chair in accordance with the preferred embodiment of the present invention comprises a support frame 1, a back support 2 mounted on the support frame 1, a head support 4 mounted on the support frame 1, and a waist support 3 pivotally mounted on the back support 2.

[0024] The support frame I is substantially U-shaped and has two substantially L-shaped sections each having a distal end formed with a support rod 11 formed with a plurality of locking holes 12. The support frame 1 has a mediate portion formed with a fixing portion 13 mounted on a seat (not shown), so that the multi-stage backrest assembly is mounted on the seat.

[0025] The back support 2 includes a backrest frame 20, a net 21 made of foam material or the like mounted on the backrest frame 20, and a crossbar 22 mounted in the backrest frame 20 and secured on the support frame 1.

[0026] The crossbar 22 of the back support 2 h...

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PUM

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Abstract

A multi-stage backrest assembly for a chair includes a support frame, a back support mounted on the support frame, a head support mounted on the support frame, and a waist support pivotally mounted on the back support. Thus, the backrest assembly has a pivotable function so as to fit the curve of the user's body ergonomically, thereby providing a comfortable effect to the user. In addition, the locking tube of the crossbar of the back support is adjustably mounted on the respective support rod of the support frame, so that the back support is adjustably mounted on the support frame to adjust the height of the back support so as to fit users of different statures.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS [0001] The present invention is a continuation-in-part application of the co-pending U.S. Ser. No. 10 / 746,631.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a multi-stage backrest assembly, and more particularly to a multi-stage backrest assembly for a chair. [0004] 2. Description of the Related Art [0005] A conventional backrest for a chair has a fixed structure that cannot be adjusted so as to fit the curve of a user's body ergonomically, so that the user easily feels uncomfortable when seated on the chair during a long period of time. SUMMARY OF THE INVENTION [0006] In accordance with the present invention, there is provided a multi-stage backrest assembly, comprising: [0007] a support frame; [0008] a back support mounted on the support frame; [0009] a head support mounted on the support frame; and [0010] a waist support pivotally mounted on the back support. [0011] The primary objectiv...

Claims

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Application Information

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IPC IPC(8): A47C7/38A47C7/40A47C7/46
CPCA47C7/38A47C7/46A47C7/405A47C7/40A47C7/36A47C7/44A47C7/462
Inventor WU, YAO-CHUAN
Owner WU YAO CHUAN
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