NL2023964B1 - A backrest for a seating structure - Google Patents

A backrest for a seating structure Download PDF

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Publication number
NL2023964B1
NL2023964B1 NL2023964A NL2023964A NL2023964B1 NL 2023964 B1 NL2023964 B1 NL 2023964B1 NL 2023964 A NL2023964 A NL 2023964A NL 2023964 A NL2023964 A NL 2023964A NL 2023964 B1 NL2023964 B1 NL 2023964B1
Authority
NL
Netherlands
Prior art keywords
backrest
bendable
frame
bendable element
disc
Prior art date
Application number
NL2023964A
Other languages
Dutch (nl)
Inventor
Hendrik Beun Jeroen
Original Assignee
Koninklijke Ahrend B V
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Koninklijke Ahrend B V filed Critical Koninklijke Ahrend B V
Priority to NL2023964A priority Critical patent/NL2023964B1/en
Application granted granted Critical
Publication of NL2023964B1 publication Critical patent/NL2023964B1/en

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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
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A backrest (l) for a seating structure (2) comprising a frame (3) that supports a woven or nonwoven cover (4), and a lumbar support member (5) engaging a rear surface of the woven or nonwoven cover (4), wherein the lumbar support member (5) is mounted on the frame (3). The lumbar support member (5) comprises a bendable element (6) that connects to opposite sides of the frame (3). At least on one side of the bendable element (6) that connects to the frame (3), a turning knob (7) is applied that cooperates with the bendable element (6) so as to provide that the extent of bending of the bendable element (6) is adjustable by turning of the turning knob (7).

Description

A backrest for a seating structure The invention relates to a backrest for a seating structure comprising a frame that supports a woven or nonwoven cover, and a lumbar support member engaging a rear surface of the woven or nonwoven cover.
US 7,841,666 discloses such a backrest for a seating structure, wherein a central spine member of the seating structure supports the backrest. The central spine member fur- ther supports a lumbar support member that engages a rear sur- face of the backrest. The lumbar support member consists of a plurality of constituent elements, both for mounting to the central spine member, and for adjustably engaging the rear surface of the backrest.
It is an objective of the invention to provide a backrest which applies less elements, is of simpler design, is less costly, and is easier to assemble.
The backrest of the invention has the features of one or more of the appended claims.
In a first aspect of the invention the lumbar support member is mounted on the frame. This tremendously simplifies the construction of the backrest and of the complete seat, which is further promoted by several of the other features as to be discussed hereinafter.
Preferably the lumbar support member comprises a bendable element that connects to opposite sides of the frame of the backrest. The backrest of the invention can thus be simplified to the extent that the lumbar support member essen- tially comprises the bendable element only.
In another aspect of the invention at least on one side of the bendable element that connects to the frame, a turning knob is applied that cooperates with the bendable ele- ment so as to provide that the extent of bending of the benda- ble element is adjustable by turning of the turning knob. The extent of bending of the bendable element implies that the ex- tent of engagement of the bendable element with the rear sur- face of the woven or nonwoven cover can be adjusted.
Manufacturing cost and ease of assembly are promoted by the preferable arrangements wherein the bendable element comprises at least one stationary part that connects to the frame, and a movable part that connects to the stationary part and which is movable with reference to the stationary part. Preferably the bendable element comprises two sta- tionary parts that connect on opposite sides to the frame, wherein the movable part is provided between said two station- ary parts.
The sturdiness of the construction according to the invention is promoted by arranging that the turning knob coop- erates with a disc, wherein the knob and the disc are provided on opposite sides of the lumbar support member, wherein the disc is provided with a slit for receiving a protrusion from the knob, and the disc is provided with a contacting edge which has a varying distance with reference to a connection of the disc with a staticnary part of the bendable element, wherein said contacting edge engages directly or indirectly the movable part of the bendable element.
In a preferred arrangement between the contacting edge and the movable part of the bendable element a compressi- ble element and a noncompressible element are provided, where- in the compressible element and the noncompressible element are movable in a slit provided in the movable part of the bendable element. This construction provides that the knob and the disc can be arrested in valleys of the contacting edge of the disc that result from the varying distance of the contact- ing edge with reference to the connection of the disc with the stationary part of the bendable element, to secure the setting with the knob of a desired amount of bending of the movable part of the bendable element.
In still another aspect of the invention the backrest is a modular item that is removably connectable to the seating structure so as to provide a complete seat.
The invention will hereinafter be further elucidated with reference to the drawing of an exemplary embodiment of a backrest and seating structure according to the invention that is not limiting as to the appended claims.
In the drawing: —-figure 1 shows different views at a seat comprising a backrest and a seating structure in accordance with the in-
vention, with emphasis on the lumbar support member of the backrest; and -figure 2 shows different views at a seat comprising a backrest and a seating structure in accordance with the in- vention, with emphasis on the modularity of the backrest.
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
With reference first to figure 1, it shows a backrest 1 for a seating structure 2 comprising a frame 3 that supports a woven or nonwoven cover 4. A lumbar support member 5 engages a rear surface of the woven or nonwoven cover 4. The lumbar support member 5 is mounted on the frame 3, and comprises a bendable element 6 that connects to opposite sides 37, 3'7 of the frame 3. A preferable aspect of the invention is that the lumbar support member 5 comprises the bendable element 6 only.
A further aspect is that at least on one side of the bendable element 6 that connects to the frame 3 a turning knob 7 1s applied that cooperates with the bendable element 6 so as to provide that the extent of bending of the bendable element 6 is adjustable by turning of the turning knob 7. In this way the level of engagement of the bendable element 6 with the rear surface of the cover 4 of the backrest 1 can be adjusted.
Figure 1 further shows that the bendable element 6 comprises at least one stationary part 6’ that connects to the frame 3, and a movable part 6’ that connects to the station- ary part 6’ and which is movable with reference to the sta- tionary part 6’. Figure 1 shows the preferred symmetrical ar- rangement wherein the bendable element 6 comprises two sta- tionary parts 6', €'’ that connect on opposite sides to the frame 3, wherein the movable part 6’’’ is provided between said two stationary parts 6’, 677.
Figure 1 further shows that the turning knob 7 coop- erates with a disc 8, wherein the knob 7 and the disc 8 are provided on opposite sides of the lumbar support member 5. The disc 8 is provided with a slit 9 for receiving a protrusion (not shown) from the knob 7 so as to rotationally fix the disc 8 to the knob 7. Rotation of the knob 7 will thus cause a sim- ultanecus rotation of the disc 8. The disc 8 is further pro- vided with a contacting edge 8’ which has a varying distance with reference to a rotatable connection 10 of the disc 8 with a stationary part 6’, 6'’ of the bendable element 6, wherein sald contacting edge 8’ engages directly or indirectly the movable part 677’ of the bendable element 6. The point of con- tact of the contacting edge 8’ of the rotatable disc 8 with the movable part 67’ of the bendable element 6 thus deter- mines the extent of bending of said movable part 67’ of the bendable element 6. Preferably between the contacting edge 8’ and the movable part 6’'’ of the bendable element 6 a com- pressible element 12 and a noncompressible element 13 are pro- vided, wherein the compressible element 12 and the noncom- pressible element 13 are movable in a slit 14 provided in the movable part 6''’ of the bendable element 6. The compressible element 12 is then locked within the slit 14 by the noncom- pressible element 13. This construction provides that the knob 7 and the disc 8 can be arrested in valleys of the contacting edge 8’ of the disc 8 that result from the varying distance of the contacting edge 8’ with reference to the connection 10 of the disc 8 with the stationary part 6’, 6’! of the bendable element 6, to secure the setting with the knob 7 of a desired amount of bending of the movable part &f’’ of the bendable el- ement 6. Reference 15 refers to a contacting surface within the knob 7 which contacts a notch 11 provided on the movable part 6''’ of the bendable element 6, and which secures that the contacting edge 8' of the disc 8 always maintains contact with the movable part €’’’, independent of the pressure that during use is applied to the bendable element 6.
Finally reference is made to figure 2 which shows that the backrest 1 is a modular item that is removably con- nectable to the seating structure 2 so as to provide a com- plete seat.
Although the invention has been discussed in the foregoing with reference to an exemplary embodiment of the backrest for a seating structure of the invention, the inven- tion is not restricted to this particular embodiment which can be varied in many ways without departing from the invention. The discussed exemplary embodiment shall therefore not be used to construe the appended claims strictly in accordance there- with. On the contrary the embodiment is merely intended to ex-
plain the wording of the appended claims without intent to limit the claims to this exemplary embodiment. The scope of protection of the invention shall therefore be construed in accordance with the appended claims only, wherein a possible 5 ambiguity in the wording of the claims shall be resolved using this exemplary embodiment. Aspects of the invention are itemized in the follow- ing section.
1. A backrest (1) for a seating structure (2) comprising a frame (3) that supports a woven or nonwoven cover (4), and a lumbar support member (5) engaging a rear surface of the woven or nonwoven cover (4), characterized in that the lumbar support member (5) is mounted on the frame (3).
2. The backrest of claim 1, characterized in that the lumbar support member (5) comprises a bendable element (6) that connects to opposite sides of the frame (3).
3. The backrest of claim 1 or 2, characterized in that the lumbar support member (5) comprises the bendable element (6) only.
4. The backrest of any one of claims 1 - 3, characterized in that at least on one side of the bendable element (6) that connects to the frame (3) a turning knob (7) is applied that cooperates with the bendable element (6) so as to provide that the extent of bending of the bendable element (6) is adjustable by turning of the turning knob (7).
5. The backrest of claim 4, characterized in that the benda- ble element (6) comprises at least one stationary part (67) that connects to the frame (3), and a movable part (677) that connects to the stationary part (67) and which is movable with reference to the stationary part (67).
6. The backrest of claim 4 or 5, characterized in that the bendable element (6) comprises two stationary parts (6', 6’) that connect on opposite sides to the frame (3), wherein the movable part (677) is provided between said two stationary parts (6', 67).
7. The backrest of claim 5 or 6, characterized in that the turning knob (7) cooperates with a disc (8), wherein the knob (7) and the disc (8) are provided on opposite sides of the lumbar support member (5), wherein the disc (8) is provided with a slit (9) for receiving a protrusion from the knob (7), and the disc (8) is provided with a contact- ing edge (8’) which has a varying distance with reference to a connection (10) of the disc (8) with a stationary part (6, 6'7) of the bendable element (6), wherein said contacting edge (8’) engages directly or indirectly the movable part (677) of the bendable element (6).
8. The backrest of claim 7, characterized in that between the contacting edge (8’) and the movable part (677) of the bendable element (6) a compressible element (12) and a noncompressible element (13) are provided, wherein the compressible element (12) and the noncompressible element (13) are movable in a slit (14) provided in the movable part 6’’' of the bendable element (6).
9. The backrest of any one of claims 1 - 8, characterized in that the backrest (1) is a modular item that is removably connectable to the seating structure (2) so as to provide a complete seat.

Claims (9)

CONCLUSIESCONCLUSIONS 1. Rugleuning (1) voor een zitconstructie (2) omvat- tende een frame (3) dat een geweven of niet-geweven bekleding (4) ondersteunt, en een lendensteunelement (5) dat aangrijpt op een achteroppervlak van de geweven of niet-geweven bekle- ding (4), met het kenmerk, dat het lendensteunonderdeel (5) op het frame (3) is gemonteerd.A backrest (1) for a seating structure (2) comprising a frame (3) that supports a woven or non-woven cover (4), and a lumbar support element (5) that engages a rear surface of the woven or non-woven fabric. woven cover (4), characterized in that the lumbar support member (5) is mounted on the frame (3). 2. Rugleuning volgens conclusie 1, met het Kenmerk, dat het lendensteunelement (5) een buigbaar element (6) omvat dat aansluit op tegenoverliggende zijden van het frame (3).Backrest according to claim 1, characterized in that the lumbar support element (5) comprises a bendable element (6) that connects to opposite sides of the frame (3). 3. Rugleuning volgens conclusie 1 of 2, met het ken- merk, dat het lendensteunelement (5) alleen het buigbare ele- ment (6) omvat.Backrest according to claim 1 or 2, characterized in that the lumbar support element (5) comprises only the bendable element (6). 4. Rugleuning volgens één van de conclusies 1 - 3, met het kenmerk, dat ten minste aan een zijde van het buigbare element (6) dat aansluit op het frame (3) een draaiknop (7) is voorzien die samenwerkt met het buigbare element (6) om er in te voorzien dat de mate van buiging van het buigbare element (6) instelbaar is door het draaien van de draaiknop (7).Backrest according to one of Claims 1 to 3, characterized in that at least on one side of the bendable element (6), which adjoins the frame (3), a rotary knob (7) is provided which cooperates with the bendable element. (6) to provide that the degree of bending of the bendable member (6) is adjustable by turning the rotary knob (7). 5. Rugleuning volgens conclusie 4, met het kenmerk, dat het buigbare element (6) ten minste een stationair deel {6') omvat dat aansluit op het frame (3), en een beweegbaar deel (6'') dat aansluit op de stationair deel (6') en dat be- weegbaar is ten opzichte van het stationaire deel (6').Backrest according to claim 4, characterized in that the bendable element (6) comprises at least a stationary part {6') that connects to the frame (3), and a movable part (6'') that connects to the stationary part (6') and which is movable relative to the stationary part (6'). 6. Rugleuning volgens conclusie 4 of 5, met het ken- merk, dat het buigbare element (6) twee stationaire delen (6', 6''}) omvat die aan tegenoverliggende zijden aansluiten op het frame (3), waarbij het beweegbare deel (6''') is aangebracht tussen de twee stationaire delen (6, 67).Backrest according to claim 4 or 5, characterized in that the bendable element (6) comprises two stationary parts (6', 6''}) which adjoin the frame (3) on opposite sides, the movable part (6''') is arranged between the two stationary parts (6, 67). 7. Rugleuning volgens conclusie 5 of 6, met het ken- merk, dat de draaiknop (7) samenwerkt met een schijf (8), waarbij de knop (7) en de schijf (8) zijn aangebracht aan te- genoverliggende zijden van het lendensteunelement (5), en waarbij de schijf (8) is voorzien van een sleuf (9) voor het opnemen van een uitsteeksel van de knop (7), en de schijf (8) is voorzien van een contactrand (8') die een variërende af- stand bezit ten opzichte van een verbinding (10) van de schijf {8) met een stationair deel (6', 6'') van het buigbare elementBackrest according to claim 5 or 6, characterized in that the turning knob (7) cooperates with a disc (8), the knob (7) and the disc (8) being arranged on opposite sides of the lumbar support element (5), and wherein the disc (8) is provided with a slot (9) for receiving a projection of the knob (7), and the disc (8) is provided with a contact edge (8') forming a varying distance from a connection (10) of the disc {8) to a stationary part (6', 6'') of the bendable element (6), waarbij genoemde contactrand (8') direct of indirect aan- grijpt op het beweegbare deel (6'') van het buigbare element (6).(6), wherein said contact edge (8') engages directly or indirectly on the movable part (6'') of the bendable element (6). 8. Rugleuning volgens conclusie 7, met het kenmerk, dat tussen de contactrand (8') en het beweegbare deel (6'') van het buigbare element (6) een samendrukbaar element (12) en een niet-samendrukbaar element (13) zijn voorzien, waarbij het samendrukbare element (12) en het niet-samendrukbare element (13) beweegbaar zijn opgenomen in een sleuf (14) die is aange- bracht in het beweegbare deel (6’’') van het buigbare element (6).Backrest according to claim 7, characterized in that between the contact edge (8') and the movable part (6'') of the bendable element (6) a compressible element (12) and a non-compressible element (13) are provided, wherein the compressible element (12) and the incompressible element (13) are movably received in a slot (14) formed in the movable portion (6''') of the bendable element (6) . 9. Rugleuning volgens één van de conclusies 1-8, met het kenmerk, dat de rugleuning (1) een modulair onderdeel is dat verwijderbaar verbindbaar is met de zitconstructie (2) voor het verschaffen van een volledige zitting.Backrest according to any one of claims 1-8, characterized in that the backrest (1) is a modular part which is removably connectable to the seat structure (2) to provide a complete seat.
NL2023964A 2019-10-04 2019-10-04 A backrest for a seating structure NL2023964B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2023964A NL2023964B1 (en) 2019-10-04 2019-10-04 A backrest for a seating structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2023964A NL2023964B1 (en) 2019-10-04 2019-10-04 A backrest for a seating structure

Publications (1)

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NL2023964B1 true NL2023964B1 (en) 2021-06-01

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ID=68654858

Family Applications (1)

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NL2023964A NL2023964B1 (en) 2019-10-04 2019-10-04 A backrest for a seating structure

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7841666B2 (en) 2002-02-13 2010-11-30 Herman Miller, Inc. Back support structure
JP2015093031A (en) * 2013-11-11 2015-05-18 コクヨファニチャー株式会社 Chair
KR101635492B1 (en) * 2015-12-01 2016-07-01 주식회사 다원체어스 Chair having lumbar vertebrae support
KR101730020B1 (en) * 2017-01-24 2017-04-25 체어마이스터 주식회사 Lumbar vertebra supporting device for chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7841666B2 (en) 2002-02-13 2010-11-30 Herman Miller, Inc. Back support structure
JP2015093031A (en) * 2013-11-11 2015-05-18 コクヨファニチャー株式会社 Chair
KR101635492B1 (en) * 2015-12-01 2016-07-01 주식회사 다원체어스 Chair having lumbar vertebrae support
KR101730020B1 (en) * 2017-01-24 2017-04-25 체어마이스터 주식회사 Lumbar vertebra supporting device for chair

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