US20060138821A1 - Chair backrest - Google Patents
Chair backrest Download PDFInfo
- Publication number
- US20060138821A1 US20060138821A1 US11/022,589 US2258904A US2006138821A1 US 20060138821 A1 US20060138821 A1 US 20060138821A1 US 2258904 A US2258904 A US 2258904A US 2006138821 A1 US2006138821 A1 US 2006138821A1
- Authority
- US
- United States
- Prior art keywords
- waist
- backrest
- backrest support
- releasably secured
- connecting member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/02—Seat parts
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/42—Support for the head or the back for the back of detachable or loose type
Definitions
- 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.
- 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. Another conventional backrest is provided with a waist support cooperated with a transmission member. Such conventional backrests are typically, relative complex in constructions and costly to manufacture. Hence, a need for improvement still exists.
- the chair backrest 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.
- the backrest support comprises a plurality of upper hollow locating cylinders
- the back unit comprises a plurality of rear pegs shaped to neatly insert into the locating cylinders for fastening.
- the frame comprises a plurality of peripheral locating holes
- the plate comprises a plurality of peripheral hollow locating cylinders shaped to neatly insert into the locating holes for fastening.
- the upper portion of the connecting member is disposed in a recess between the back unit and the backrest support, and the lower portion of the connecting member is disposed in a recess between the frame and the plate.
- FIG. 1 is an exploded view of a preferred embodiment of a chair backrest according to the invention
- FIG. 2 is a perspective view of the assembled backrest of FIG. 1 ;
- FIG. 3 is a side view of the backrest of FIG. 2 assembled with a chair
- FIG. 4 is a front view of the backrest of FIG. 2 ;
- FIG. 5 is a schematic sectional view taken along sectional line I of FIG. 4 ;
- FIG. 6 is a view similar to FIG. 5 , where a force is exerted onto the waist unit and the connecting member is elastically deformed in response.
- 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.
- 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.
- 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 .
- the backrest support 4 is formed integrally and includes, from top to bottom, a plurality of hollow locating cylinders 43 arranged on the upper and side edges of an upper section, a projection 41 , a plurality of threaded holes 42 arranged as a shape of rectangle around the projection 41 , and a forwardly projected bracket 44 .
- the bent, resilient connecting member 2 includes a plurality of threaded holes, an upper portion disposed in a recess of the upper section of the backrest support 4 , and a lower portion disposed in a recess behind the frame 12 and fastened between the frame 12 and the plate 13 by screwing fasteners 5 through apertures on the lower portion of the connecting member 2 into the apertures 121 and by inserting locating cylinders 131 of the plate 13 into the locating holes 122 of the frame 12 .
- the projection 41 is neatly inserted into a central hole of the connecting member 2 attached to the waist unit 1 for positioning.
- the plurality of fasteners 5 are secured through apertures on the upper portion of the connecting member 2 to the holes 42 of the backrest support 4 for fastening.
- pegs of the back unit 3 are inserted into the hollow locating cylinders 43 so that the back unit 3 and the backrest support 4 are assembled together.
- the forwardly projected bracket 44 is secured to a bottom of a seat in a manner well known in the art.
- the connecting member 2 in response to the waist of a seated person urged against the waist unit 1 as indicated by arrows, the connecting member 2 is elastically deformed. As a result, a great degree of comfort to the waist of the person is brought by the ergonomic waist unit 1 .
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
- 1. Field of Invention
- 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.
- 2. Related Art
- 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. Another conventional backrest is provided with a waist support cooperated with a transmission member. Such conventional backrests are typically, relative complex in constructions and costly to manufacture. Hence, a need for improvement still exists.
- It is therefore an object of the present invention to provide a two-sectional ergonomic chair backrest which has simply constructions and structures.
- 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.
- In one aspect of the present invention, the backrest support comprises a plurality of upper hollow locating cylinders, and the back unit comprises a plurality of rear pegs shaped to neatly insert into the locating cylinders for fastening.
- In another aspect of the present invention, the frame comprises a plurality of peripheral locating holes, and the plate comprises a plurality of peripheral hollow locating cylinders shaped to neatly insert into the locating holes for fastening.
- In yet another aspect of the present invention, the upper portion of the connecting member is disposed in a recess between the back unit and the backrest support, and the lower portion of the connecting member is disposed in a recess between the frame and the plate.
- The above and other objects, features and advantages of the present invention will become apparent from the following detailed description taken with the accompanying drawings.
-
FIG. 1 is an exploded view of a preferred embodiment of a chair backrest according to the invention; -
FIG. 2 is a perspective view of the assembled backrest ofFIG. 1 ; -
FIG. 3 is a side view of the backrest ofFIG. 2 assembled with a chair; -
FIG. 4 is a front view of the backrest ofFIG. 2 ; -
FIG. 5 is a schematic sectional view taken along sectional line I ofFIG. 4 ; and -
FIG. 6 is a view similar toFIG. 5 , where a force is exerted onto the waist unit and the connecting member is elastically deformed in response. - 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 awaist unit 1, a bent, resilient connectingmember 2, anupper back unit 3 and a substantially rectangular,vertical backrest support 4 and a plurality offasteners 5 such as screws or the like. - The
waist unit 1 includes afront waist member 11 formed of an elastomeric material, an intermediate,rectangular frame 12 having a plurality of locatingholes 122 on its periphery and a plurality ofapertures 121 in its upper, central portion, and a rear,rectangular plate 13 having a plurality of hollow locatingcylinders 131 shaped to neatly insert into the locatingholes 122 for fastening. - The
upper back unit 3 includes afront backrest member 31 formed of an elastomeric material, and a curvedrear portion 32 having a plurality of pegs (not shown) shaped to neatly insert into the locatingcylinders 43. - The
backrest support 4 is formed integrally and includes, from top to bottom, a plurality of hollow locatingcylinders 43 arranged on the upper and side edges of an upper section, aprojection 41, a plurality of threadedholes 42 arranged as a shape of rectangle around theprojection 41, and a forwardly projectedbracket 44. - The bent, resilient connecting
member 2 includes a plurality of threaded holes, an upper portion disposed in a recess of the upper section of thebackrest support 4, and a lower portion disposed in a recess behind theframe 12 and fastened between theframe 12 and theplate 13 byscrewing fasteners 5 through apertures on the lower portion of the connectingmember 2 into theapertures 121 and by inserting locatingcylinders 131 of theplate 13 into the locatingholes 122 of theframe 12. - In assembly, referring to
FIGS. 1 and 3 , theprojection 41 is neatly inserted into a central hole of the connectingmember 2 attached to thewaist unit 1 for positioning. The plurality offasteners 5 are secured through apertures on the upper portion of the connectingmember 2 to theholes 42 of thebackrest support 4 for fastening. In addition, pegs of theback unit 3 are inserted into the hollow locatingcylinders 43 so that theback unit 3 and thebackrest support 4 are assembled together. The forwardly projectedbracket 44 is secured to a bottom of a seat in a manner well known in the art. - Referring to
FIGS. 3, 4 , 5, and 6, in response to the waist of a seated person urged against thewaist unit 1 as indicated by arrows, the connectingmember 2 is elastically deformed. As a result, a great degree of comfort to the waist of the person is brought by theergonomic waist unit 1. - While the invention herein disclosed has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.
Claims (4)
1. A chair backrest comprising:
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.
2. The chair backrest of claim 1 , wherein the backrest support comprises a plurality of upper hollow locating cylinders, and the back unit comprises a plurality of rear pegs shaped to neatly insert into the locating cylinders for fastening.
3. The chair backrest of claim 1 , wherein the frame comprises a plurality of peripheral locating holes, and the plate comprises a plurality of peripheral, hollow locating cylinders shaped to neatly insert into the locating holes for fastening.
4. The chair backrest of claim 1 , wherein the upper portion of the connecting member is disposed between the back unit and the backrest support, and the lower portion of the connecting member is disposed between the frame and the plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/022,589 US20060138821A1 (en) | 2004-12-27 | 2004-12-27 | Chair backrest |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/022,589 US20060138821A1 (en) | 2004-12-27 | 2004-12-27 | Chair backrest |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060138821A1 true US20060138821A1 (en) | 2006-06-29 |
Family
ID=36610591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/022,589 Abandoned US20060138821A1 (en) | 2004-12-27 | 2004-12-27 | Chair backrest |
Country Status (1)
Country | Link |
---|---|
US (1) | US20060138821A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080277542A1 (en) * | 2007-03-06 | 2008-11-13 | Shun Hwong | Chair backrest mounting bracket |
CN101874688A (en) * | 2009-04-30 | 2010-11-03 | 杨诚 | Seating device |
US9468300B1 (en) * | 2014-06-16 | 2016-10-18 | Franklin Michael Eatherly | Universal back support for piano/organ benches |
US11641944B2 (en) | 2021-07-14 | 2023-05-09 | Anthro Form, Llc | Double angle back support adjustment |
US11744375B2 (en) | 2021-07-14 | 2023-09-05 | Anthro Form, Llc | Seat configuration |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3669499A (en) * | 1970-12-30 | 1972-06-13 | Steelcase Inc | Chair |
US4971380A (en) * | 1990-02-26 | 1990-11-20 | Chrysler Corporation | Vehicle backrest attaching arrangement |
US5975634A (en) * | 1997-10-24 | 1999-11-02 | Steelcase Development Inc. | Chair including novel back construction |
US6220661B1 (en) * | 1999-04-19 | 2001-04-24 | Steelcase Development Inc. | Chair back and method of assembly |
US6257665B1 (en) * | 1998-07-09 | 2001-07-10 | Okamura Corporation | Chair |
US20030197407A1 (en) * | 2002-03-29 | 2003-10-23 | Sanchez Gary L. | Health chair a dynamically balanced task chair |
US20050006935A1 (en) * | 2003-07-10 | 2005-01-13 | Hsiu-Mei Chang | Adjustable waistrest structure of a chair |
US6843530B1 (en) * | 2003-12-23 | 2005-01-18 | Yao-Chuan Wu | Multi-stage backrest assembly |
US6908152B2 (en) * | 2001-12-14 | 2005-06-21 | L & P Property Management Company | Push lumbar support with flexible pressure surface |
-
2004
- 2004-12-27 US US11/022,589 patent/US20060138821A1/en not_active Abandoned
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3669499A (en) * | 1970-12-30 | 1972-06-13 | Steelcase Inc | Chair |
US4971380A (en) * | 1990-02-26 | 1990-11-20 | Chrysler Corporation | Vehicle backrest attaching arrangement |
US5975634A (en) * | 1997-10-24 | 1999-11-02 | Steelcase Development Inc. | Chair including novel back construction |
US6257665B1 (en) * | 1998-07-09 | 2001-07-10 | Okamura Corporation | Chair |
US6220661B1 (en) * | 1999-04-19 | 2001-04-24 | Steelcase Development Inc. | Chair back and method of assembly |
US6908152B2 (en) * | 2001-12-14 | 2005-06-21 | L & P Property Management Company | Push lumbar support with flexible pressure surface |
US20030197407A1 (en) * | 2002-03-29 | 2003-10-23 | Sanchez Gary L. | Health chair a dynamically balanced task chair |
US20050006935A1 (en) * | 2003-07-10 | 2005-01-13 | Hsiu-Mei Chang | Adjustable waistrest structure of a chair |
US6843530B1 (en) * | 2003-12-23 | 2005-01-18 | Yao-Chuan Wu | Multi-stage backrest assembly |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080277542A1 (en) * | 2007-03-06 | 2008-11-13 | Shun Hwong | Chair backrest mounting bracket |
CN101874688A (en) * | 2009-04-30 | 2010-11-03 | 杨诚 | Seating device |
US9468300B1 (en) * | 2014-06-16 | 2016-10-18 | Franklin Michael Eatherly | Universal back support for piano/organ benches |
US11641944B2 (en) | 2021-07-14 | 2023-05-09 | Anthro Form, Llc | Double angle back support adjustment |
US11744375B2 (en) | 2021-07-14 | 2023-09-05 | Anthro Form, Llc | Seat configuration |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: OASYSCHAIR CO., LTD., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:PAN, TOUNG-CHUN;REEL/FRAME:016138/0927 Effective date: 20041220 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |