EP2158823A1 - Chair with spring-mounted seat element - Google Patents
Chair with spring-mounted seat element Download PDFInfo
- Publication number
- EP2158823A1 EP2158823A1 EP09252047A EP09252047A EP2158823A1 EP 2158823 A1 EP2158823 A1 EP 2158823A1 EP 09252047 A EP09252047 A EP 09252047A EP 09252047 A EP09252047 A EP 09252047A EP 2158823 A1 EP2158823 A1 EP 2158823A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leg unit
- chair
- seat element
- spring
- spring clip
- 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.)
- Withdrawn
Links
Images
Classifications
-
- 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
- A47C3/0252—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame connected only by an elastic member positioned between seat and base frame
-
- 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
- A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs
Definitions
- the invention relates to a chair with a seat element, which is mounted on a leg unit.
- a seat element comprises a seat pan, which on the one hand forms a seating surface and on the other hand a back rest.
- the seat element for example is rigidly bolted to a leg unit, which forms four chair legs.
- the leg unit here can be designed as a tubular structure.
- a chair comprising a seat element having a seating surface, which is mounted on a leg unit, is proposed.
- the seat element is solely connected to the leg unit by means of a spring clip.
- the seat element can move in relation to the leg unit as a function of the spring action and the force acting on the seat element and follow back and forth changing weight-bearings of the user in the dimensions permitted by the design of the spring.
- the spring action of the spring clip thus increases the seat comfort compared to the prior art described above.
- the seat element can be designed as a chair pan, configured in the usual way, with a seating surface and a backrest and comprise upholstery over its entire area or only in parts.
- the leg unit can be designed in various ways and for example represent a frame, which has four chair legs or a rotating stand.
- the spring clip is substantially a U shaped spiral spring, by which one side is fastened to the seat element and the other side to the leg unit.
- the two sides here preferably are aligned substantially horizontally, so that the spiral spring is openly configured towards the chair back.
- the side of the spiral spring fastened to the leg unit preferably lies underneath on a cross bar of the leg unit, which in the case of a leg unit designed as a four-legged frame preferably extends between laterally arranged pairs of legs of the leg unit.
- the base of the U shaped spiral spring can therefore be released to the maximum by the contact of the lower side of the spiral spring from below on the cross bar in respect of its overall height.
- the spiral spring which for example has a width of approximately 8 - 15 cm, is preferably formed from an extruded profile with a substantially U shaped cross section.
- the extruded profile from which the sections are produced for the spiral spring, is drawn from aluminium or an aluminium alloy. The alloy can then be accurately composed for the required strength so that the desired spring action of the spiral spring results.
- the spiral spring from a metal pressing or also from a suitable plastic.
- the spring clip For connecting the spring clip to the seat element and the leg unit the spring clip can have threaded sleeves, by means of which it is bolted to the seat element and the leg unit.
- the leg unit for example consists of two curved profiles, conjoined in the region of the cross bar for connecting the spiral spring, which in each case form two chair legs and in each case are preferably fixed to the spring clip.
- a screw connection for joining the two curved profiles together is therefore possibly no longer necessary.
- An exemplary embodiment of a chair according to an aspect of the present invention is diagrammatically illustrated in a simple way in the drawing and is explained in detail by the following description.
- the drawing illustrates a chair 10, which has a seat pan 12, produced from a section 14 forming a seating surface and a back rest 16.
- the section 14 forming the seating surface and the backrest 16 of the seat pan 12 are each provided with an upholstery pad 18 or 20.
- the seat pan 12 representing a seat element, is connected to a leg unit 24 designed as a four-legged frame by a spring clip 22, which is designed as a substantially U shaped spiral spring.
- the leg unit 24 is formed from two curved profiles 26 and 28, each bent similar to the drop handlebars of a bicycle, which have a substantially square cross section and form two of the four chair legs respectively.
- the two curved profiles 26 and 28 conjoin in their respective middle sections for forming a cross bar 30.
- the spring clip 22 is fastened by means of two fixing screws 32 underneath to the curved profiles 26 and 28 in each case.
- the fixing screws 32 here in each case are inserted in a threaded sleeve 34 of the spring clip 22 in the region of its lower, substantially horizontally aligned side 36.
- the spring clip 22 in the region of its upper, substantially horizontally aligned side 38 has four threaded sleeves 40, into which a screw 42 is inserted from above in each case for connecting the seat pan 12 to the spring clip 22.
- the screws 42 are covered or concealed by the upholstery pad 18.
- the threaded sleeves 34 and 40 in each case are designed as so-called sunken castellated nuts, whose conical section is inserted into a corresponding hole of the spring clip 22 in each case, so that the screws 42 covered by the upholstery 18 and the screws 32 can be locked.
- the spring clip 22 has a width of approximately 10 cm and is formed from an extruded profile made of an aluminium alloy.
- the open side of the U shaped spring clip related to a conventional chair direction, points to the rear and enables the seat element 12 to spring back and forth.
- a buffer element 44 consisting of a flexible material, rubber for example, is arranged in the region of the cross bar 30 on its top, which serves as a stop for the upper side 38 of the spiral spring 22 whenever the seat element 12 bears a heavy weight.
- the spring clip 22 is produced by drawing an extruded profile made of an aluminium alloy with a U shaped cross section, that is to say with the cross section of the spring clip 22 and by subsequent cutting to length of the extruded profile into sections of 10 cm for example.
Abstract
A chair, comprising a seat element (12) having a seating surface, which is mounted on a leg unit (24), characterized in that the seat element (12) is solely connected to the leg unit (24) by means of a spring clip (22).
Description
- The invention relates to a chair with a seat element, which is mounted on a leg unit.
- Such chairs are known from practice and for example a seat element comprises a seat pan, which on the one hand forms a seating surface and on the other hand a back rest. The seat element for example is rigidly bolted to a leg unit, which forms four chair legs. The leg unit here can be designed as a tubular structure.
- There is a requirement to create a chair of the above mentioned type having increased seat comfort.
- This requirement is achieved by the chair with the features of
Claim 1. - According to the invention therefore a chair, comprising a seat element having a seating surface, which is mounted on a leg unit, is proposed. The seat element is solely connected to the leg unit by means of a spring clip.
- Due to the spring clip the seat element can move in relation to the leg unit as a function of the spring action and the force acting on the seat element and follow back and forth changing weight-bearings of the user in the dimensions permitted by the design of the spring. The spring action of the spring clip thus increases the seat comfort compared to the prior art described above.
- The seat element can be designed as a chair pan, configured in the usual way, with a seating surface and a backrest and comprise upholstery over its entire area or only in parts. The leg unit can be designed in various ways and for example represent a frame, which has four chair legs or a rotating stand.
- In a preferred embodiment of the invention the spring clip is substantially a U shaped spiral spring, by which one side is fastened to the seat element and the other side to the leg unit. The two sides here preferably are aligned substantially horizontally, so that the spiral spring is openly configured towards the chair back.
- In order to be able to provide maximum spring length or maximum spring travel the side of the spiral spring fastened to the leg unit preferably lies underneath on a cross bar of the leg unit, which in the case of a leg unit designed as a four-legged frame preferably extends between laterally arranged pairs of legs of the leg unit. The base of the U shaped spiral spring can therefore be released to the maximum by the contact of the lower side of the spiral spring from below on the cross bar in respect of its overall height.
- The spiral spring, which for example has a width of approximately 8 - 15 cm, is preferably formed from an extruded profile with a substantially U shaped cross section. Thus it can be ensured when mass-producing a chair according to the present invention that the spring action is uniform from chair to chair. For example the extruded profile, from which the sections are produced for the spiral spring, is drawn from aluminium or an aluminium alloy. The alloy can then be accurately composed for the required strength so that the desired spring action of the spiral spring results.
- Alternatively it is naturally also conceivable to produce the spiral spring from a metal pressing or also from a suitable plastic.
- For connecting the spring clip to the seat element and the leg unit the spring clip can have threaded sleeves, by means of which it is bolted to the seat element and the leg unit.
- The leg unit for example consists of two curved profiles, conjoined in the region of the cross bar for connecting the spiral spring, which in each case form two chair legs and in each case are preferably fixed to the spring clip. A screw connection for joining the two curved profiles together is therefore possibly no longer necessary.
- Further benefits and advantageous arrangements of the subject matter of the invention result from the description, drawings and claims for protection.
- An exemplary embodiment of a chair according to an aspect of the present invention is diagrammatically illustrated in a simple way in the drawing and is explained in detail by the following description.
-
Fig. 1 shows a perspective view of a chair with a seat element designed as seat pan and a leg frame, wherein the seat element is illustrated transparently for the sake of clarity; -
Fig. 2 shows a longitudinal section through the chair in the region of the connection of the seat pan to the side frame; and -
Fig. 3 is an enlarged illustration of the connection region. - The drawing illustrates a
chair 10, which has aseat pan 12, produced from asection 14 forming a seating surface and aback rest 16. As to be inferred fromFig. 2 , thesection 14 forming the seating surface and thebackrest 16 of theseat pan 12 are each provided with anupholstery pad - The
seat pan 12, representing a seat element, is connected to aleg unit 24 designed as a four-legged frame by aspring clip 22, which is designed as a substantially U shaped spiral spring. Theleg unit 24 is formed from twocurved profiles curved profiles cross bar 30. In the region of the cross bar thespring clip 22 is fastened by means of twofixing screws 32 underneath to thecurved profiles curved profiles leg unit 24 are also rigidly placed against each other. Thefixing screws 32 here in each case are inserted in a threadedsleeve 34 of thespring clip 22 in the region of its lower, substantially horizontally alignedside 36. - The
spring clip 22 in the region of its upper, substantially horizontally alignedside 38 has four threadedsleeves 40, into which ascrew 42 is inserted from above in each case for connecting theseat pan 12 to thespring clip 22. Thescrews 42 are covered or concealed by theupholstery pad 18. - The threaded
sleeves spring clip 22 in each case, so that thescrews 42 covered by theupholstery 18 and thescrews 32 can be locked. - The
spring clip 22 has a width of approximately 10 cm and is formed from an extruded profile made of an aluminium alloy. The open side of the U shaped spring clip, related to a conventional chair direction, points to the rear and enables theseat element 12 to spring back and forth. - As overload protection a
buffer element 44 consisting of a flexible material, rubber for example, is arranged in the region of thecross bar 30 on its top, which serves as a stop for theupper side 38 of thespiral spring 22 whenever theseat element 12 bears a heavy weight. - The
spring clip 22 is produced by drawing an extruded profile made of an aluminium alloy with a U shaped cross section, that is to say with the cross section of thespring clip 22 and by subsequent cutting to length of the extruded profile into sections of 10 cm for example.
Claims (8)
- A chair, comprising a seat element (12) having a seating surface, which is mounted on a leg unit (24), characterized in that the seat element (12) is solely connected to the leg unit (24) by means of a spring clip (22).
- A chair according to claim 1, characterized in that the spring clip (22) is substantially a U shaped spiral spring, by which one side (38) is fastened to the seat element (12) and the other side (36) to the leg unit (24).
- A chair according to claim 2, characterized in that the side (36), fastened to the leg unit (24), of the spiral spring (22) lies underneath on a cross bar (30) of the leg unit (24), which preferably extends between laterally arranged pairs of legs of the leg unit (24).
- A chair according to claim 3, characterized in that the leg unit (24) consists of two curved profiles (26, 28) conjoined for forming the cross bar (30), which in each case form two chair legs and are preferably connected to the spiral spring (22) in each case.
- A chair according to anyone of claims 1 to 4, characterized in that the spring clip (22) is formed from an extruded profile with a substantially U shaped cross section.
- A chair according to claim 2, characterized in that the spiral spring (22) has a width of approximately 8 - 15 cm.
- A chair according to anyone of claims 1 to 6, characterized in that the spring clip (22) is an aluminium component or an aluminium alloy component.
- A chair according to anyone of claims 1 to 7, characterized in that the spring clip (22) preferably has threaded sleeves (36, 38) made of steel, by means of which it is bolted to the seat element (12) and the leg unit (24).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202008011303U DE202008011303U1 (en) | 2008-08-25 | 2008-08-25 | Chair with spring-mounted seat element |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2158823A1 true EP2158823A1 (en) | 2010-03-03 |
Family
ID=39917860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09252047A Withdrawn EP2158823A1 (en) | 2008-08-25 | 2009-08-25 | Chair with spring-mounted seat element |
Country Status (3)
Country | Link |
---|---|
US (1) | US20100060057A1 (en) |
EP (1) | EP2158823A1 (en) |
DE (1) | DE202008011303U1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202009004493U1 (en) | 2009-03-31 | 2009-06-18 | Neidhardt, Lisa | Ergonomic chair, especially school chair |
EP2887836B1 (en) * | 2012-08-24 | 2016-07-27 | Johann Niklas | Piece of seating furniture |
RU2536716C1 (en) * | 2013-04-30 | 2014-12-27 | Марк Фёдорович Агашин | Device for health-improving effect on human body |
US9480337B2 (en) * | 2014-05-01 | 2016-11-01 | Yotrio Group Co., Ltd. | Disassemblable rocking chair with concealed connections |
US9560917B2 (en) | 2014-11-26 | 2017-02-07 | Steelcase Inc. | Recline adjustment system for chair |
EP3085273B1 (en) * | 2015-04-20 | 2017-06-28 | Festo AG & Co. KG | Office chair |
US9661929B1 (en) * | 2016-01-25 | 2017-05-30 | Harvest-Excel International Pte. Ltd. | Topple-proof buffering structure for a chair |
DE102017103651A1 (en) * | 2017-02-22 | 2018-08-23 | Aeris Gmbh | Active dynamic seating |
US11197548B2 (en) * | 2019-12-16 | 2021-12-14 | Allseating Corporation | Reclining control system for a chair |
WO2023135287A1 (en) * | 2022-01-17 | 2023-07-20 | Ullman Dynamics Ab | Spring unit and method for changing a spring constant of a spring arrangement in a spring unit |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3297360A (en) * | 1964-04-24 | 1967-01-10 | Holmstrom Erik Folke | Chair |
US3337265A (en) * | 1965-03-04 | 1967-08-22 | Heywood Wakefield Co | Chair construction |
US4786106A (en) * | 1987-05-11 | 1988-11-22 | Homecrest Industries Incorporated | Rocking chair construction and method of making same |
US5599064A (en) * | 1995-07-27 | 1997-02-04 | Telescope Casual Furniture Co. | Swivel rocker |
US20040113471A1 (en) * | 2002-12-13 | 2004-06-17 | Richard Rivera | Rocking chair |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US293813A (en) * | 1884-02-19 | Chair | ||
US131349A (en) * | 1872-09-17 | Daniel m | ||
US163705A (en) * | 1875-05-25 | Improvement in tilting chairs | ||
US2704112A (en) * | 1951-07-05 | 1955-03-15 | Herbert C Rice | Tractor seat having adjustable spring support |
US2769484A (en) * | 1954-06-25 | 1956-11-06 | Howard G Kairath | Resiliently mounted hobby horse |
US3695693A (en) * | 1970-08-06 | 1972-10-03 | Tartan Corp | Seat construction |
US4411468A (en) * | 1981-03-05 | 1983-10-25 | Homecrest Industries Incorporated | Rocking chair |
US4577907A (en) * | 1984-10-19 | 1986-03-25 | Air-Lock Plastics, Inc. | Seat assembly |
US6220616B1 (en) * | 1999-11-02 | 2001-04-24 | Teftec Corporation | Wheelchair arm rest support assembly with slide lock positioning arm |
US20020000745A1 (en) * | 2000-06-16 | 2002-01-03 | Conte Samuel S. | Patient chair with quaternary spring motion |
US6598544B2 (en) * | 2001-05-17 | 2003-07-29 | Mity-Lite, Inc. | Locking mechanism for folding legs |
-
2008
- 2008-08-25 DE DE202008011303U patent/DE202008011303U1/en not_active Expired - Lifetime
-
2009
- 2009-08-25 EP EP09252047A patent/EP2158823A1/en not_active Withdrawn
- 2009-08-25 US US12/547,112 patent/US20100060057A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3297360A (en) * | 1964-04-24 | 1967-01-10 | Holmstrom Erik Folke | Chair |
US3337265A (en) * | 1965-03-04 | 1967-08-22 | Heywood Wakefield Co | Chair construction |
US4786106A (en) * | 1987-05-11 | 1988-11-22 | Homecrest Industries Incorporated | Rocking chair construction and method of making same |
US5599064A (en) * | 1995-07-27 | 1997-02-04 | Telescope Casual Furniture Co. | Swivel rocker |
US20040113471A1 (en) * | 2002-12-13 | 2004-06-17 | Richard Rivera | Rocking chair |
Also Published As
Publication number | Publication date |
---|---|
DE202008011303U1 (en) | 2008-10-30 |
US20100060057A1 (en) | 2010-03-11 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR |
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AX | Request for extension of the european patent |
Extension state: AL BA RS |
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17P | Request for examination filed |
Effective date: 20100819 |
|
17Q | First examination report despatched |
Effective date: 20100916 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20110127 |