CA2302063A1 - Ergonomic chair - Google Patents
Ergonomic chair Download PDFInfo
- Publication number
- CA2302063A1 CA2302063A1 CA002302063A CA2302063A CA2302063A1 CA 2302063 A1 CA2302063 A1 CA 2302063A1 CA 002302063 A CA002302063 A CA 002302063A CA 2302063 A CA2302063 A CA 2302063A CA 2302063 A1 CA2302063 A1 CA 2302063A1
- Authority
- CA
- Canada
- Prior art keywords
- chair
- backrest
- seat
- carriage
- person
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
- A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
- A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/02—Rocking chairs
- A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
- A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
-
- 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
- A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
- A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
-
- 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
- A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
- A47C7/443—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with coil springs
Abstract
A work station chair is enabled to shift in response to a person leaning forward in the chair when in a working mode and leaning back in a rest position.
The chair includes a seat, a backrest and supportive structure. The seat is resiliently supported on the supportive structure and moveably along an arc track which is mounted on the supportive structure and has a radius generated from the ankle of the person sitting on the chair. The backrest is resiliently supported on the seat and moveable along an arc track which is mounted to the seat and has a radius generated from H-point that is a natural pivot point of the torso and thigh lines of the person. The chair provides a combined tilting movement of the person's body about the ankle point and the H-point when the person shifts his or her gravity to reduce adverse static postural loads and forces which are responsible for the fatigue and biomechanical dysfunction. It is also easy to adjust simultaneously the chair and the backrest for different weight loads of persons, which can be done by the person while sitting on the chair and reaching for an adjustment knob in front of the chair.
The chair includes a seat, a backrest and supportive structure. The seat is resiliently supported on the supportive structure and moveably along an arc track which is mounted on the supportive structure and has a radius generated from the ankle of the person sitting on the chair. The backrest is resiliently supported on the seat and moveable along an arc track which is mounted to the seat and has a radius generated from H-point that is a natural pivot point of the torso and thigh lines of the person. The chair provides a combined tilting movement of the person's body about the ankle point and the H-point when the person shifts his or her gravity to reduce adverse static postural loads and forces which are responsible for the fatigue and biomechanical dysfunction. It is also easy to adjust simultaneously the chair and the backrest for different weight loads of persons, which can be done by the person while sitting on the chair and reaching for an adjustment knob in front of the chair.
Claims (20)
1. A chair passively adjustable in response to shift center of gravity of a person sitting on the chair, comprising:
a supportive structure adapted to support the chair and the weight of the person;
a seat adjustably mounted on the supportive structure and pivotable in a vertical plane about an ankle point of the person;
a backrest adjustably mounted on the seat and pivotable in the vertical plane about a nature pivot point of the torso and thigh lines of the person;
resilient means for resiliently supporting the respective seat and backrest in a position in which the person sitting erectly or forwardly for work, and permitting the seat and backrest to pivot in response to the shift center of gravity of the person in rest; and positive adjustment mechanism mounted on a front of the chair and associated with the resilient means for positively adjusting the resilience of the resilient means by the person while sitting on the chair.
a supportive structure adapted to support the chair and the weight of the person;
a seat adjustably mounted on the supportive structure and pivotable in a vertical plane about an ankle point of the person;
a backrest adjustably mounted on the seat and pivotable in the vertical plane about a nature pivot point of the torso and thigh lines of the person;
resilient means for resiliently supporting the respective seat and backrest in a position in which the person sitting erectly or forwardly for work, and permitting the seat and backrest to pivot in response to the shift center of gravity of the person in rest; and positive adjustment mechanism mounted on a front of the chair and associated with the resilient means for positively adjusting the resilience of the resilient means by the person while sitting on the chair.
2. A chair as claimed in claim 1 wherein the resilient means comprises a first support end pivotally mounted on the supportive structure, a second support end pivotally mounted on the backrest, and a third support end pivotally mounted to the positive adjustment mechanism and slidable relative to the seat.
3. A chair as claimed in claim 2 wherein the resilient means comprises a first resilient device for supporting the seat and a second resilient device for supporting the backrest, one end of the first resilient device and one end of the second resilient device being connected to a common point of the positive adjustment mechanism, the common point being moveable to pre-compress the first and second resilient devices simultaneously.
4. A chair as claimed in claim 3 wherein the positive adjustment mechanism comprises a threaded connection assembly to convert a rotation to the movement of the common point.
5. A backrest structure for a chair comprising:
a curved track in a fixed relation to a seat of the chair;
a carriage slidably mounted on the curved track;
a backrest mounted on the carriage;
an resilient support mechanism provided for resiliently supporting the carriage and backrest with respect to the seat so that the carriage is biased uppermost to support the backrest in an erect position, and adapted to slide down along the curved track and tilt the backrest rearwards and downwardly in response to a rearward shift of the weight of a person sitting on the chair and leaning against the backrest.
a curved track in a fixed relation to a seat of the chair;
a carriage slidably mounted on the curved track;
a backrest mounted on the carriage;
an resilient support mechanism provided for resiliently supporting the carriage and backrest with respect to the seat so that the carriage is biased uppermost to support the backrest in an erect position, and adapted to slide down along the curved track and tilt the backrest rearwards and downwardly in response to a rearward shift of the weight of a person sitting on the chair and leaning against the backrest.
6. A backrest structure as claimed in claim 5 wherein the curved track is a circular arc having a radius in a vertical plane generated from a point which substantially matches a natural pivot point of the torso and thigh lines of the person sitting on the chair.
7. A backrest structure as claimed in claim 5 wherein adjustment means are provided for adjusting the resilient support mechanism such that the backrest is enabled to be maintained in the erect position in response to different body loads of persons utilising the chair.
8. A backrest structure as claimed in claim 7 wherein the resilient support member includes a pair of compressible spring rods positioned at sides of the chair, each being anchored at one end to the carriage and at the other end to the adjustment means positioned on a front end of the seat.
9. A backrest structure as claimed in claim 8 wherein the adjustment means comprise a threaded bolt rotatably mounted on the front end of the seat, an adjustment bar threadedly connected to the threaded bolt and associated with the other end of the spring rod so that the spring rod is pre-compressed when the threaded bolt is rotated.
10. A backrest structure as claimed in claim 9 wherein ball bearings are provided between the carriage and the curved track.
11. A chair comprising:
a seat and a base of the chair for supporting the seat;
a supportive structure adapted to support the chair and the weight of a person sitting on the chair;
a first curved track mounted on the supportive structure;
a first carriage movably mounted on the first curved track and attached in fixed relation to the base so that the base is moveable relative to the supportive structure;
a first resilient support mechanism provided for resiliently supporting the base relative to the supportive structure, the first carriage being biased to support the seat in a substantially horizontal position;
a backrest of the chair;
a second curved track mounted to the base;
a second carriage movably mounted on the second curved track, and associated in fixed relation with the backrest so that the backrest is moveable relative to the base;
an second resilient support mechanism provided for resiliently supporting the second carriage and backrest with respect to the base, the second carriage being biased uppermost to support the backrest in an erect position; and whereby the first and second carriages are enabled to slide down along the respective first and second curved tracks and tilt the respective seat and backrest rearwards and downwardly in response to a rearward shift of the weight of a person sitting on the chair and leaning against the backrest.
a seat and a base of the chair for supporting the seat;
a supportive structure adapted to support the chair and the weight of a person sitting on the chair;
a first curved track mounted on the supportive structure;
a first carriage movably mounted on the first curved track and attached in fixed relation to the base so that the base is moveable relative to the supportive structure;
a first resilient support mechanism provided for resiliently supporting the base relative to the supportive structure, the first carriage being biased to support the seat in a substantially horizontal position;
a backrest of the chair;
a second curved track mounted to the base;
a second carriage movably mounted on the second curved track, and associated in fixed relation with the backrest so that the backrest is moveable relative to the base;
an second resilient support mechanism provided for resiliently supporting the second carriage and backrest with respect to the base, the second carriage being biased uppermost to support the backrest in an erect position; and whereby the first and second carriages are enabled to slide down along the respective first and second curved tracks and tilt the respective seat and backrest rearwards and downwardly in response to a rearward shift of the weight of a person sitting on the chair and leaning against the backrest.
12. A chair as claimed in claim 11 wherein the first curved track is a circular arc having a radius in a vertical plane generated from a point which is close to a natural pivot point of the ankle joint of the person sitting on the chair.
13. A chair as claimed in claim 11 wherein the second curved track is a circular arc having a radius in a vertical plane generated from a point which substantially matches a natural pivot point of the torso and thigh lines of the person sitting on the chair.
14. A chair as claimed in claim 11 wherein adjustment means are provided for adjusting the resilience of the first and second resilient support mechanisms in response to different weight loads of persons utilising the chair.
15. A chair as claimed in claim 14 wherein the first resilient support mechanism includes a pair of compressible gas cylinder assemblies, each being anchored at one end to the supportive structure and at the other end to the adjustment means mounted on a front end of the base.
16. A chair as claimed in claim 15 wherein the second resilient support mechanism includes a pair of compressible spring rods, each being anchored at one end to the second carriage and at the other end to the adjustment means.
17. A chair as claimed in claim 16 wherein the adjustment means comprises a threaded bolt rotatably mounted to the front end of the base and an adjustment bar threadedly connected to the threaded bolt and associated with the other ends of the gas cylinder assemblies and the spring rods, so that the gas cylinder assemblies and spring rods are pre-compressible when the threaded bolt is rotated.
18. A chair as claimed in claim 17 wherein the base includes a seat plate on top of which the seat is attached, two side plates extending downwards from two sides of the seat plate respectively, and a slot being defined in each side plate at a front end, the slots receiving a cylinder support rod which is laterally extending therethrough and slidable along the slot, the cylinder support rod being attached to the adjustment bar and connected to the respective other ends of the gas cylinder assemblies and the spring rods so that the respective other ends of the cylinder assemblies and the spring rods are moveable along the slot in response to the rotation of the threaded bolt.
19. A chair as claimed in claim 18 wherein the supportive structure includes a vertical stem rotatably received in a sleeve mounted to the first curved track.
20. A chair as claimed in claim 19 wherein ball bearings are provided between the first carriage and the first curved track, and between the second carriage and the second curved track.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2302063A CA2302063C (en) | 2000-03-23 | 2000-03-23 | Ergonomic chair |
| US10/221,186 US7497515B2 (en) | 2000-03-23 | 2001-03-20 | Ergonomic chair |
| PCT/CA2001/000361 WO2001071527A2 (en) | 2000-03-23 | 2001-03-20 | Ergonomic chair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2302063A CA2302063C (en) | 2000-03-23 | 2000-03-23 | Ergonomic chair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2302063A1 true CA2302063A1 (en) | 2001-09-23 |
| CA2302063C CA2302063C (en) | 2010-08-17 |
Family
ID=4165625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2302063A Expired - Fee Related CA2302063C (en) | 2000-03-23 | 2000-03-23 | Ergonomic chair |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US7497515B2 (en) |
| CA (1) | CA2302063C (en) |
| WO (1) | WO2001071527A2 (en) |
Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2626404C (en) | 2002-02-13 | 2010-02-02 | Herman Miller, Inc. | Tilt chair having a flexible back, adjustable armrests and adjustable seat depth, and methods for the use thereof |
| US7234775B2 (en) * | 2002-06-18 | 2007-06-26 | Hector Serber | Dynamically balanced seat assembly having independently and arcuately movable seat and backrest and method |
| US20050006930A1 (en) * | 2003-03-26 | 2005-01-13 | Graco Children's Products Inc. | High chair |
| EP1570767A1 (en) * | 2004-03-01 | 2005-09-07 | Rbm A/S | Weight regulator for a chair |
| EP2001338B1 (en) * | 2006-03-24 | 2016-10-26 | Herman Miller Inc. | Body support structure |
| CN101431923B (en) * | 2006-04-24 | 2012-03-28 | 休思乐公司 | Chair having an automatically adjusting resistance to tilting |
| JP5490004B2 (en) * | 2007-09-20 | 2014-05-14 | ハーマン、ミラー、インコーポレイテッド | Body support structure |
| US8272692B1 (en) * | 2009-10-26 | 2012-09-25 | Epperson Ronald B | Office chair having tiltable seat and back |
| US20110304192A1 (en) * | 2010-06-15 | 2011-12-15 | Augustat Betty A | Ergometric Chair Apparatus |
| US9504326B1 (en) | 2012-04-10 | 2016-11-29 | Humanscale Corporation | Reclining chair |
| US9504327B2 (en) * | 2015-02-09 | 2016-11-29 | Harmony Lifestyle, LLC | Reclinable chair having a locking gas spring reclining back rest |
| US10813464B2 (en) * | 2015-05-15 | 2020-10-27 | Irina L. Melnik | Active fitness chair |
| US11553798B2 (en) * | 2015-05-15 | 2023-01-17 | Irina L. Melnik | Active fitness chair with an exercise armrest |
| CN105758353B (en) * | 2016-05-05 | 2018-07-06 | 中国汽车技术研究中心 | The measuring method of dummy's knee displacement in a kind of impact test |
| US10231546B2 (en) | 2017-03-02 | 2019-03-19 | Knoll, Inc. | Chair back tilt mechanism |
| CN109106121B (en) * | 2018-10-09 | 2023-11-28 | 颐维医疗器械（上海）有限公司 | Seat tool |
| WO2020247435A1 (en) * | 2019-06-05 | 2020-12-10 | Davis Furniture Industries, Inc. | Improved tilting chair |
| CN111887636A (en) * | 2020-06-01 | 2020-11-06 | 安徽钜将家具制造有限公司 | Adjustable seat |
| CN111728408B (en) * | 2020-06-09 | 2023-05-02 | 杭州新涵美家居用品有限公司 | Self-adaptive backrest seat |
| US11690455B2 (en) * | 2020-09-18 | 2023-07-04 | Dinkar Chellaram | Synchronous-tilt reclining chair |
| CN112315681B (en) * | 2020-11-02 | 2022-08-09 | 天津职业技术师范大学(中国职业培训指导教师进修中心) | Wheelchair capable of achieving shifting function |
| US11812870B2 (en) * | 2021-02-10 | 2023-11-14 | Steelcase Inc. | Body support structure |
| CN113475886A (en) * | 2021-08-25 | 2021-10-08 | 南通市久正人体工学股份有限公司 | Seat forward-leaning air spring mounting structure and air spring model selection method |
| DE102021126161A1 (en) * | 2021-10-08 | 2023-04-13 | Bock 1 Gmbh & Co. Kg | Mechanism for a piece of seating furniture, in particular for an office chair |
| EP4241620A1 (en) * | 2022-03-09 | 2023-09-13 | Pro-Cord S.p.A. | A chair with a tilting backrest |
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| DE2335586A1 (en) * | 1973-01-29 | 1975-01-30 | Fritz Kerstholt | SITTING AND / OR Lounging furniture with moveable back |
| DE2929428C2 (en) * | 1979-07-20 | 1983-10-20 | Fa. Willibald Grammer, 8450 Amberg | Seat, especially office chair |
| JPS5628714A (en) * | 1979-08-20 | 1981-03-20 | Tokico Ltd | Locking chair |
| AT367992B (en) * | 1981-03-17 | 1982-08-25 | Zuend & Co Ag K | SEAT FURNITURE |
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-
2000
- 2000-03-23 CA CA2302063A patent/CA2302063C/en not_active Expired - Fee Related
-
2001
- 2001-03-20 US US10/221,186 patent/US7497515B2/en not_active Expired - Fee Related
- 2001-03-20 WO PCT/CA2001/000361 patent/WO2001071527A2/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CA2302063C (en) | 2010-08-17 |
| US20070210634A1 (en) | 2007-09-13 |
| WO2001071527A3 (en) | 2001-12-27 |
| US7497515B2 (en) | 2009-03-03 |
| WO2001071527A2 (en) | 2001-09-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20170323 |