WO2020003187A1 - Structure de chaise - Google Patents

Structure de chaise Download PDF

Info

Publication number
WO2020003187A1
WO2020003187A1 PCT/IB2019/055440 IB2019055440W WO2020003187A1 WO 2020003187 A1 WO2020003187 A1 WO 2020003187A1 IB 2019055440 W IB2019055440 W IB 2019055440W WO 2020003187 A1 WO2020003187 A1 WO 2020003187A1
Authority
WO
WIPO (PCT)
Prior art keywords
flexible member
movable member
rigid
designed
frame
Prior art date
Application number
PCT/IB2019/055440
Other languages
English (en)
Inventor
Claudio Gorgi
Original Assignee
Imarc S.P.A.
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 Imarc S.P.A. filed Critical Imarc S.P.A.
Priority to EP19756248.1A priority Critical patent/EP3813594B1/fr
Priority to PL19756248.1T priority patent/PL3813594T3/pl
Publication of WO2020003187A1 publication Critical patent/WO2020003187A1/fr

Links

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

Definitions

  • the present invention concerns the technical sector of furniture and furnishings, and more specifically it concerns a chair structure configured to allow a user to comfortably seat thereon.
  • this type of chairs is provided with supports that are designed to contact the lumbar area of the user when the latter is seated with his/her back resting on the back of the chair.
  • US20140077548 and US201477541 describe a chair structure provided with a supporting element mounted on the rear part of the back and designed to become a lumbar support for the user.
  • This support comprises a flexible body with an elongated portion extending therefrom, said elongated portion being provided with a plurality of passages that can be removably engaged with a projection that is integral with the back.
  • US6557939 concerns a mechanism for adjusting the back of a chair, comprising, among other things, also a flexible lumbar reinforcing element that can be removably fixed to the back through quick coupling means such as Velcro, tear-off means, etc.
  • US2005062323 describes an office chair structure provided with a rigid back and a support for the lumbar area. This support is fixed to a substantially rigid bearing element through a vertical slot that allows its height to be adjusted between two end positions.
  • US6189972 and CN2042738360 describe a chair structure with a back arranged at a fixed height from the upper surface of the seat and a lumbar support with adjustable height and depth.
  • US4893872 and US8308240 describe a chair structure provided with a lumbar support with adjustable depth only.
  • J P2014079519 describes an office chair structure provided with a back having a supporting element for the lumbar area.
  • This support is mounted directly on the upright of the back and can be adjusted in height, since it is provided with a fixing pin sliding within a slot that is also formed in the back upright. Even if the upright is designed to be a substantially rigid element, its partial flexibility generates the secondary effect of promoting a selective adjustment of the hinge arm of the lumbar support.
  • the stiffness of the support varies slightly according to the locking point of the support itself.
  • a further drawback is represented by the fact that, in some cases, the forward or backward movement of the support serves only to adjust its depth.
  • DE102008002974 describes a chair structure provided with a lumbar support whose stiffness can be selectively adjusted by the user by preloading a spring.
  • W02006/094261 describes a chair structure where the chair is provided with a lumbar and pelvic support having also a lumbar support unit mounted on an adjusting assembly anchored to the back frame.
  • the support comprises an arm whose elasticity can vary according to the position assumed by two corresponding hinge elements that can be selectively moved on said arm between two end positions and are arranged on the opposite side with respect to the middle plane of the elastic portion of the arm, in such a way as to promote an asymmetrical response of the support when the same interacts with the user’s back.
  • the vertical position of the hinge elements can be autonomously adjusted by the user by selectively rotating a pair of levers.
  • a further drawback posed by this solution lies in that the assembly of the structure requires a rather long time.
  • the present invention intends to overcome the drawbacks described above by providing a chair structure that offers some important advantages.
  • the main object of the present invention is to provide a chair structure that is particularly simple to construct and is made up of a limited number of components.
  • the combination of technical characteristics specified in the main claim makes it possible to obtain a particularly resistant chair structure, easy to assemble and flexible to use.
  • the outer surface of the movable member is designed to directly contact the outer surface of the rigid member (also) when the second end of said flexible member interacts with the user’s lumbar area.
  • the user can adjust the length of the arm by acting directly on the movable member, with no need to operate further levers or other complex kinematic mechanisms.
  • a further advantage of the present invention lies in that it is easy to install, since the frame can be provided with a slot for the removable insertion of the flexible member.
  • snap-on locking means are provided, which are associated with the flexible member in order to promote the removable locking of the latter to the frame, once it has been inserted in said slot.
  • FIG. 1 Figures from 1 to 3 show perspective views, respectively a front, a rear and a partial view of a chair structure according to the invention, in a first configuration
  • Figures 4A and 4B respectively show a front and a rear perspective view of a first detail of the chair structure shown in Figure 1 ;
  • Figures 5A and 5B respectively show a front and a rear perspective view of a second detail of the chair structure shown in Figure 1 ;
  • FIG. 6 shows a sectional view of a detail of the chair structure shown in
  • FIGS. 7A and 7B respectively show a rear and an exploded perspective view of a chair structure according to the invention, in a second configuration
  • FIG. 8 and 9 show top views of two particular embodiments of the structure shown in Figure 1 ;
  • FIGS. 10A to 10C show perspective views of a chair structure according to the invention, with a different configuration compared to the chair structure shown in Figure 1 ;
  • FIG. 1 1 shows a perspective view of a chair structure according to the invention, in a further configuration
  • the subject of the present invention is a chair structure, indicated as a whole by the numeral 1 , specifically suitable for those types of chairs designed to be used for long periods of time such as, for example, office chairs or similar chairs.
  • the present chair structure 1 comprises a supporting frame 2 that is associated with at least one rigid member 3.
  • the frame 2 can be mainly constituted by a perimeter edge comprising a single rigid member 3 positioned in proximity to the back of the chair.
  • the frame 2 and the rigid member 3 can be made in a polymeric material through an injection moulding process.
  • the rigid member 3 is integral with the frame 2, more specifically the upper end of the rigid member 3 is connected to the frame through a pair of substantially horizontal crosspieces 4.
  • the rigid member 3 can be mounted on the frame 2 in a removable manner, as shown in the configuration of Figures 7A and 7B.
  • the structure 1 is also provided with a flexible member 5 designed to be anchored to the supporting frame 2 in proximity to the rigid member 3.
  • the flexible member 5 has a first substantially rectilinear extension axis l_i and is connected to the frame 2 in such a way as to maintain said axis Li in a vertical position.
  • the flexible member 5 is anchored to the frame 2 before the rigid member 3 and is separated from the latter by a predetermined distance di.
  • the flexible member 5 can be provided with at least one substantially elongated stem 6 that extends parallel to the extension axis l_i.
  • Each stem 6 is provided with a first end 7 designed to be anchored to the frame 2 and a second end 8 designed to interact with the lumbar area of a user’s back when the latter rests on the back of the chair.
  • the second end 8 of the stem 6 can have a widened shape developing along a direction X substantially orthogonal to the first extension axis Li.
  • the second end 8 can interact with a large portion of the user’s lumbar area.
  • the flexible member 5 can be made in a polymeric material through an injection moulding process.
  • the flexible member 5 is provided with a single stem 6 having a first end 7 connected to the frame 2 in a removable manner.
  • the frame 2 can be provided with a slot 9, visible in Figure 3, designed to allow the removable insertion of the first end 7 of the stem 6.
  • snap-on locking means 10 can be provided, which are associated with the stem 6 and suited to promote the removable locking of the flexible member 5 to the frame 2 after the insertion of the first end 7 in the slot 9.
  • the locking means 10 may comprise a flexible tab 1 1 formed in proximity to the first end 7 of the stem 6.
  • a projection 12 designed to abut the frame 2 during the insertion of the first end 7 in the slot 9.
  • the tab 1 1 has a free edge 13 that projects from the outer surface 14 of the stem 6 and is designed to contact the lower surface of the frame 2 following the insertion of the first end 7 in the slot 9, thus promoting the locking of the flexible member 5 in the position of installation.
  • the slot 9 and the locking means 10 make the structure 1 particularly flexible, as they allow the flexible member 9 to be installed or removed in a particularly simple and quick manner.
  • the structure 1 is also provided with a movable member 15 designed to be slidably mounted on the flexible member 5 and/or on the rigid member 3.
  • the movable member 15 extends along a second rectilinear extension axis l_ 2 and in the configuration shown in Figures from 1 to 7B this component is mounted on the structure 1 in order to maintain this axis l_ 2 substantially perpendicular with respect to the first extension axis of the flexible member 5.
  • the movable member 15 is made of a polymeric material, too, and can slide on the flexible member 5 and/or on the rigid member 3 in order to promote a selective variation of the mechanical stiffness provided by the flexible member 5 for the user’s back.
  • the movable member 15 can slide freely and with a limited effort on the flexible member 5 and/or on the rigid member 3.
  • the movable member 15 contacts both the flexible member 5 and the rigid member 3 and the pressure that is generated is such as to promote the relative locking of the rigid member 15 with respect to the flexible member 5.
  • the movable member 15 can still slide with respect to the other members 3, 5 but to promote this movement it is necessary to exert more force than that exerted when the back of the user does not rest on the second end 8 of the flexible member 5.
  • the movable member 15 defines a constraint element for the flexible member 5 and the only part that can oscillate with respect to the first extension axis is constituted by the portion of the member 5 that extends above the movable member 15 and comprises also the second end 8.
  • the flexibility of the flexible member 5 can vary between a maximum value, when the movable member 15 is in the lower position, and a minimum value, when the movable member 15 is in the upper position.
  • the stiffness of the second end 8 of the flexible member 5 is maximum, respectively minimum, depending on whether the movable member 15 is in the upper or lower position.
  • the movable member 15 can be directly seized by a user, who can thus make it slide selectively on the rigid member 3 and/or on the flexible member 5 to vary the length of the arm 16. Furthermore, the movable member 15 has a first outer surface 17 intended to directly contact the outer surface 14 of the flexible member 5, and a second outer surface 18 suited to directly contact the outer surface 19 of the rigid member 3.
  • the chair structure illustrated in Figures from 1 to 7B includes the use of a movable member 15 slidably mounted on the flexible member 5.
  • This movable member 15 is provided with at least one free end portion 20 that can be directly seized by the user (in the case illustrated in the figure, there is a pair of these free ends 20).
  • the free ends 20 of the movable member 15 can have a curved and tapered shape, in order to define an especially ergonomic geometry that makes it easier to seize and to operate for the user.
  • the free ends 20 are connected to each other by an intermediate portion 21 having substantially constant thickness and comprising the first outer surface 17 and the second outer surface 18 intended to contact the outer surface 14 of the stem 6 and the outer surface 19 of the rigid member 3.
  • the first end surface 17 associated with the intermediate portion 21 defines a through seat 22 having a polygonal cross section substantially countershaped with respect to the cross section of the stem 6 of the flexible member 5.
  • the stem 6 has a substantially rectangular cross section with constant dimensions, consequently also the seat 22 has a rectangular cross section, slightly larger than the cross section of the stem 6, in order to allow the stem 6 to be easily inserted therein.
  • the seat 22 is open on its external side 23, which is only partially delimited by a pair of teeth 24 that are mutually aligned and parallel.
  • the stem 6 can be inserted in the through seat 22 before the first end 7 of the flexible member 5 is anchored to the frame 2.
  • the intermediate portion 21 can have a second outer surface 18 positioned on the opposite side with respect to the through seat 22.
  • the second outer surface 18 can be delimited by a pair of projecting sections 25 suited to define a corresponding track for the insertion of a vertical guide 26 formed on the rigid member 3.
  • the second outer surface 18 is positioned in proximity to the through seat 22.
  • the vertical guide 26 will be sized so that it can be inserted in the open external side 23 of the seat 22 and interact with the teeth 24 of the latter during the sliding movement of the movable member 15.
  • the movable member 15 shown in Figure 8 does not have the projecting sections (which, for example, are shown in Figure 5A) and in this case the second outer surface 18 is defined by the same teeth 24. [0091] In the configuration shown in Figure 9, instead, there are two projecting sections 25 that extend from the ends of the teeth 24, wherein these projecting sections 25 serve the double function of defining the track for the vertical guide 26 and the second outer surface 18 designed to contact the outer surface 19 of the rigid member 3.
  • means 27 can be provided that are suited to promote the adjustment of the position of the movable member 15 with respect to the rigid member 3.
  • These means 27, for example, may include the formation of a plurality of shaped recesses 28 on the outer surface 14 of the stem 6 of the flexible member 5.
  • the recesses 28 are distributed along the first extension axis Li and can be preferably spaced from each other with substantially constant pitch.
  • the projection 29 can be located in proximity to the inner side of the seat 22 and the recesses 28 will thus be formed on the portion of the outer surface 14 of the stem 6 that is designed to face this side of the seat 22.
  • the frame 2 comprises a pair of substantially parallel rigid members 3 provided with a pair of slots 30 aligned with each other.
  • the movable member 15 has a pair of end portions 20 provided with the second outer surface 18 and suited to be inserted in said slots 30.
  • the movable member 15 furthermore comprises at least one inner portion 31 designed to contact the stem 6 of the flexible member 5 and provided with the first outer surface 17.
  • the flexible member 5 has only one stem 6 and the movable member 15 has only one inner portion
  • the flexible member 5 has two stems 6 and therefore the movable member 15 has a pair of inner portions 31 , each one of which is provided with a respective first outer surface 17.
  • the remaining parts of the movable member 15 (which do not need to be inserted in the slots 30 and do not define inner portions 31 ) are substantially free and can be seized by the user.
  • the structure 1 may comprise also means 32 for adjusting the depth of the second end 8 of the flexible member 5.
  • said means 32 can promote the selective movement of the second end 8 along a direction Z that is substantially horizontal and parallel to the ground, as better visible in Figures 12A and 12B.
  • the depth adjusting means 32 can be defined by the outer surface 14 of the flexible member 5 and/or by the outer surface 19 of the rigid member 3. More specifically, the outer surface 14 of the flexible member 5 and/or the outer surface 19 of the rigid member 3 can be inclined or curved in order to promote the forward movement of the stem 6 during the translation of the movable member 15.
  • the inclination of this surface 14, 19 can be selected in such a way as not to promote any translation of the second end 8 when the movable member 15 is in the lower position, and to promote the maximum translation of said end 8 when the movable member 15 is in the upper position.

Landscapes

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

Abstract

L'invention concerne une structure de chaise comprenant un cadre porteur (2), un élément souple (5), un élément mobile (15) ; le cadre porteur (2) comprenant au moins un élément rigide (3) ; l'élément souple (5) pouvant être ancré audit cadre (2) à proximité dudit élément rigide (3) et présentant au moins une première extrémité (7) conçue pour être ancrée au cadre (2) et une seconde extrémité (8) conçue pour soutenir la zone lombaire du dos de l'utilisateur ; l'élément mobile (15) étant monté coulissant sur l'élément souple (5) et/ou sur ledit élément rigide (3) afin de favoriser une variation sélective de la rigidité mécanique fournie par l'élément souple (5) vis-à-vis du dos de l'utilisateur. L'élément mobile (15) peut être saisi directement par l'utilisateur afin de favoriser son mouvement coulissant sélectif sur l'élément souple (5) et/ou sur ledit élément rigide (3) ; l'élément mobile (15) présente une première surface externe (17) conçue pour entrer en contact direct avec la surface externe (14) de l'élément souple (5) et une seconde surface externe (18) conçue pour entrer en contact direct avec la surface externe (19) de l'élément rigide (3).
PCT/IB2019/055440 2018-06-28 2019-06-27 Structure de chaise WO2020003187A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19756248.1A EP3813594B1 (fr) 2018-06-28 2019-06-27 Structure de chaise
PL19756248.1T PL3813594T3 (pl) 2018-06-28 2019-06-27 Konstrukcja krzesła

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000006788 2018-06-28
IT102018000006788A IT201800006788A1 (it) 2018-06-28 2018-06-28 Struttura di sedia

Publications (1)

Publication Number Publication Date
WO2020003187A1 true WO2020003187A1 (fr) 2020-01-02

Family

ID=63762778

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/055440 WO2020003187A1 (fr) 2018-06-28 2019-06-27 Structure de chaise

Country Status (4)

Country Link
EP (1) EP3813594B1 (fr)
IT (1) IT201800006788A1 (fr)
PL (1) PL3813594T3 (fr)
WO (1) WO2020003187A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4091504A1 (fr) * 2021-05-20 2022-11-23 Comfort Office Furniture Co., Ltd Guangdong Structure de réglage de la force de support de coussin lombaire et chaise
KR20220159242A (ko) * 2021-05-25 2022-12-02 컴포트 오피스 퍼니처 컴퍼니 리미티드 광둥 허리 베개 지지력 조절 구조 및 시트

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6557939B1 (en) * 1998-10-21 2003-05-06 Vitra Patente Ag Adjustment mechanism, back cover and arm rest for a chair
WO2006094261A2 (fr) * 2005-03-01 2006-09-08 Haworth, Inc. Dossier de fauteuil equipe de supports pour les lombaires et le bassin
DE202011107639U1 (de) * 2011-11-08 2012-11-26 Topstar Gmbh Stuhllehne mit variablem Stützelement
US9713385B1 (en) * 2016-03-16 2017-07-25 Oasyschair Co., Ltd. Lower-back supporting device of chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6557939B1 (en) * 1998-10-21 2003-05-06 Vitra Patente Ag Adjustment mechanism, back cover and arm rest for a chair
WO2006094261A2 (fr) * 2005-03-01 2006-09-08 Haworth, Inc. Dossier de fauteuil equipe de supports pour les lombaires et le bassin
DE202011107639U1 (de) * 2011-11-08 2012-11-26 Topstar Gmbh Stuhllehne mit variablem Stützelement
US9713385B1 (en) * 2016-03-16 2017-07-25 Oasyschair Co., Ltd. Lower-back supporting device of chair

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4091504A1 (fr) * 2021-05-20 2022-11-23 Comfort Office Furniture Co., Ltd Guangdong Structure de réglage de la force de support de coussin lombaire et chaise
US20220369816A1 (en) * 2021-05-20 2022-11-24 Comfort Office Furniture Co., Ltd Guangdong Structure for adjusting support force of lumbar pillow, and chair
KR20220157274A (ko) * 2021-05-20 2022-11-29 컴포트 오피스 퍼니처 컴퍼니 리미티드 광둥 허리베개 지지력 조절 구조와 시트
US11617445B2 (en) 2021-05-20 2023-04-04 Comfort Office Furniture Co., Ltd Guangdong Structure for adjusting support force of lumbar pillow, and chair
KR102565650B1 (ko) 2021-05-20 2023-08-09 컴포트 오피스 퍼니처 컴퍼니 리미티드 광둥 허리베개 지지력 조절 구조와 시트
KR20220159242A (ko) * 2021-05-25 2022-12-02 컴포트 오피스 퍼니처 컴퍼니 리미티드 광둥 허리 베개 지지력 조절 구조 및 시트
KR102573355B1 (ko) 2021-05-25 2023-08-30 컴포트 오피스 퍼니처 컴퍼니 리미티드 광둥 허리 베개 지지력 조절 구조 및 시트

Also Published As

Publication number Publication date
PL3813594T3 (pl) 2022-10-10
EP3813594A1 (fr) 2021-05-05
IT201800006788A1 (it) 2019-12-28
EP3813594B1 (fr) 2022-05-11

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