EP4277498A1 - Système d?appui - Google Patents

Système d?appui

Info

Publication number
EP4277498A1
EP4277498A1 EP22700376.1A EP22700376A EP4277498A1 EP 4277498 A1 EP4277498 A1 EP 4277498A1 EP 22700376 A EP22700376 A EP 22700376A EP 4277498 A1 EP4277498 A1 EP 4277498A1
Authority
EP
European Patent Office
Prior art keywords
shell
support
receiving
support arrangement
carrier shell
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.)
Pending
Application number
EP22700376.1A
Other languages
German (de)
English (en)
Inventor
Boris REDWANZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4277498A1 publication Critical patent/EP4277498A1/fr
Pending legal-status Critical Current

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—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • 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
    • A47C31/02—Upholstery attaching means
    • A47C31/023—Upholstery attaching means connecting upholstery to frames, e.g. by hooks, clips, snap fasteners, clamping means or the like
    • 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
    • A47C7/28—Seat parts with tensioned springs, e.g. of flat type
    • A47C7/282—Seat parts with tensioned springs, e.g. of flat type with mesh-like supports, e.g. elastomeric membranes
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/02—Office stools not provided for in main groups A47C1/00, A47C3/00 or A47C7/00; Workshop stools

Definitions

  • the invention relates to a support arrangement, in particular for the backrest of a seat device, which has a carrier shell and a mounting shell that can be mounted on the carrier shell.
  • Such support arrangements which are regularly formed from a more rigid and a more flexible component, are usually provided to provide various ergonomic properties.
  • Support arrangements especially for backrests of chairs, which support the back are comfortable at the same time, are used both in the private and in the professional field. Especially in the case of office or work chairs, on which the user usually spends a lot of time, it is important to support the back as well as to comfortably accommodate or lean on the back.
  • Chairs are known in the prior art, in particular office or work chairs, the backrests of which have a frame over which a network with openings is applied. This gives the backrest a certain flexibility, ensures air permeability and, depending on the tension of the mesh, supports the user's back, for example in the lumbar area.
  • the disadvantage of these solutions is often that the network is not particularly resilient. Depending on the material, the longer it is used, the more it yields, which reduces the support function. In addition, a backrest made of a mesh material is also easily destructible. Another disadvantage is the assembly, which is complicated by the corresponding tensioning of the net.
  • Another solution known in the art for providing chairs that provide both back support and comfort is upholstered chairs that are adjustable to provide support for different areas of the back, such as the lumbar region.
  • EP 3 231 330 B1 discloses a backrest for a chair with a backrest frame which defines chest, shoulder, lumbar and pelvic areas, the backrest frame having a pair of spaced-apart upright support posts, the support posts being upper and bottom ends. The upper ends are connected by an upper support cross member and the lower ends are connected by a lower support cross member, the support posts and cross members together defining a window in the back frame.
  • the back frame has a front and a back opposite to the front.
  • the backrest also includes a flexible back support surface that is supported on the backrest frame.
  • the backrest further includes a lumbar mechanism positioned between the back frame and the flexible back support surface, the lumbar mechanism including a lumbar pad.
  • the lumbar pad is formed as a flexible, hollow, tubular bolster with at least a portion of the lumbar pad engaging the flexible back support surface and with the lumbar pad visible through the window in the back frame.
  • the object of the present invention is to provide a support arrangement that is comparatively easy to produce and assemble, in particular for a backrest of a chair, which is both robust and flexible and ensures ergonomically favorable support for the back section of a user.
  • a support arrangement for a chair comprises a support shell, a mountable on the support shell receiving shell and a locking element.
  • the carrier shell and the receiving shell each have connecting structures which are designed to be complementary to one another in an edge region.
  • the connection structures are configured to engage in one another in the assembled state in such a way that they form a through-channel into which the locking element can be introduced.
  • the support arrangement can be provided for a component of a chair that assumes a support function and in particular accommodates or supports a body part of a user of the chair when the user is sitting on the chair.
  • a component of a chair that assumes a support function and in particular accommodates or supports a body part of a user of the chair when the user is sitting on the chair.
  • it can be designed to form a seat or an armrest.
  • the support arrangement is designed as or for a component of a backrest of the chair and can be referred to as a backrest arrangement.
  • the term “chair” is understood here to mean any known form of seating equipment or seating furniture. In particular, it can be an office chair or a work chair.
  • the term "shell” is generally used here for a dimensionally stable element that has a significantly larger surface area or length and width than thickness.
  • a shell within the meaning of the present disclosure is designed over large parts as a plate, whereby it is not planar or flat, but is shaped to suit an intended use, such as curved; moreover, it can have several openings or openings.
  • the receiving shell in a side view, can be adapted to a part of the body of a user of the chair, which it is intended to receive during use. In a backrest, the receiving shell can be ergonomically shaped to fit the user's back.
  • the term "dimensionally stable” is understood here to mean that the corresponding element retains its shape in any case when no force is acting on it. However, a particularly elastic deformation when a force is applied typically occurs.
  • receptacle typically refers to a side of the support assembly that faces the user of the chair and against which the user's body or back rests. So the receiving shell can accommodate the body or the back of the user when he is sitting on the chair.
  • carrier shell typically refers to a non-user side of the support assembly to which the cradle is mounted and which is typically formed from a substantially rigid plastic shell, i.e. the carrier shell is preferably less flexible than the cradle.
  • the carrier shell therefore preferably forms a holder for the receiving shell.
  • rim region refers here to a section along a peripheral end of the associated receiving or carrier shell.
  • the surrounding peripheral end of the receiving or carrier shell typically includes a number of edge regions.
  • the edge areas can be vertical form running edges of the backrest, ie preferably without the upper edge and the lower edge.
  • several edge regions can also be formed circumferentially or on three of the four sides of the seat device.
  • the carrier shell and the receiving shell are configured as follows:
  • the carrier shell is dimensionally stable and has a first elasticity.
  • the receiving shell is also designed to be dimensionally stable and has a second elasticity.
  • the second elasticity of the receiving shell is higher than the first elasticity of the carrier shell.
  • the term “elasticity” is generally understood here to mean the ability of a material to reverse a change in shape caused by external influences under its own power.
  • the elasticity of a material is described as high if the material is easily deformable. This means that a material has a comparatively high elasticity if it can be deformed with comparatively little effort.
  • the leaning shell can preferably be designed as a flexible membrane made of a dimensionally stable plastic material. Such a configuration of the carrier and receiving shells enables a comparatively high degree of mobility or flexibility when receiving a body part.
  • the relatively soft cradle may allow a user's back to be ergonomically supported and allow a certain amount of movement of the back without the back becoming unsupported.
  • the “locking element” is introduced or pushed into the through-channel formed by the complementary connecting structures and protrudes through this in the assembled state. In this way, the connection structures and with them the receiving shell and the carrier shell are firmly fastened or locked to one another.
  • the locking element ensures in particular a form-fitting or form-fitting/force-fitting connection between the carrier shell and the receiving shell.
  • connection structures designed to be complementary to one another in any case include such geometric configurations that are able to engage in one another and then together to define the through-channel for the locking element.
  • the complementary to each other Connection structures can have different geometries from one another or they can have essentially the same geometry.
  • the "through channel” is intended to be an approximately tunnel-shaped cavity or free space which extends through the connection structures when they interlock and thus passes through the locking structures. It enables the locking element to be inserted (and optionally released without tools) comparatively easily and in particular without tools.
  • the through-channel can run continuously. As a rule, however, it is not designed to be completely closed over its entire length. In particular, it can have alternatingly arranged opening gaps, which can be arranged, for example, on both sides of the edge area.
  • the through-channel preferably has a round cross-section, but it can also have a triangular, square, rectangular or polygonal cross-section.
  • the cross section of the locking element corresponds to the cross-sectional shape of the through-channel in such a way that a secure assembly of the receiving shell on the carrier shell can be ensured.
  • the cross-sectional shapes of the through channel and the locking element do not necessarily have to be identical.
  • either the connecting structure of the carrier shell, the connecting structure of the receiving shell or the connecting structure of the carrier shell and the connecting structure of the receiving shell have claws that are spaced apart from one another.
  • the term “claw” is understood to mean a finger-shaped or rod-shaped extension which is typically at least partially curved. Such a configuration of the corresponding connection structure creates the prerequisite for a particularly simple interlocking to produce the through-channel. Efficient assembly can thus be made possible.
  • the claws preferably comprise an engagement area, a first connection area and a bearing area.
  • the prerequisite for an optimal interaction of the two connection structures can be achieved by providing geometric configurations that are particularly well suited for complementary cohesion.
  • the connecting structure of the carrier shell or the connecting structure of the receiving shell has openings spaced apart from one another.
  • the Openings spaced apart from one another preferably receive the claws of the other connecting structure when the connecting structures engage in one another.
  • the corresponding connection structure is preferably configured in the form of a bead.
  • the openings spaced apart from one another are each introduced between adjacent side walls of the bead.
  • the “bulge” is generally designed in the form of an essentially rounded thickening, which, however, also has geometries complementary to the claws, which are preferably also designed for a flush finish to the outside. In this way, in particular, a flush assembly of the carrier shell and the receiving shell in the edge area can also be made possible, ie an essentially smooth surface especially on the side of the edge area of the receiving shell facing the user.
  • the connecting structures are configured to engage one another by the openings each receiving one of the claws. In this way, a simple and efficient meshing can be achieved to create the through-channel.
  • connection structure preferably configured in the form of a bead, comprises a bearing projection, a second connection area and a receiving area.
  • the support projection and the receiving area are preferably each arranged in the area of the openings.
  • the second connection area is arranged in one of the side walls of the bead, with an opening preferably being provided in each case between two adjacent side walls of the bead.
  • the complementary engagement areas and bearing projections on the one hand and the complementary bearing areas and receiving areas on the other hand are preferably designed in such a way that they enable uncomplicated assembly, with a form-fitting cohesion between the two connection structures being able to be provided at least in certain directions even without the locking element being introduced.
  • connection structure of the receiving shell and the connection structure of the carrier shell preferably have partial curves arranged in alternation, which are designed to form the through-channel with a substantially round cross-section in the assembled state.
  • the partial curves are aligned in opposite directions to one another.
  • the partial roundings are preferably provided in the first connection area of the claws and in the second connection area of the bead. They enclose the locking element, seen in cross-section, together essentially completely, wherein one partial rounding can enclose the locking element somewhat more and the other partial rounding can enclose the locking element somewhat less than half.
  • the contact projection of the connecting structure or the bead and a retaining element of the claws form a lateral travel limit of the receiving shell.
  • a lateral tensile load on the cradle i.e. a force component directed essentially sideways inwards, for example when a user leans against the cradle - corresponding stop surfaces of the support projection and the holding element form the lateral travel limit (of the cradle under tensile load).
  • the “sideways inwardly directed force component” is therefore the force component acting essentially in the direction of the user when leaning against the edge regions.
  • a contact projection of the bead and a contact area between adjacent claws preferably form a rear travel limitation.
  • a rear pressure load on the cradle i.e. a force component directed essentially at the carrier cradle, for example when a user leans back in the cradle or sits on a cradle - corresponding stop surfaces of the contact projection and the contact area form the rear travel limit (of the cradle under pressure).
  • the “rearwardly directed force component” is thus in the present case the force component acting in the leaning direction of the user, essentially from the receiving shell to the carrier shell.
  • the carrier shell and/or the receiving shell are preferably formed from a thermoplastic material. This material is particularly suitable for production using the injection molding process. In addition, thermoplastics are flexible or elastic even in the solid state, so that a wide range of desired elasticity properties can be efficiently adjusted accordingly.
  • the carrier shell and/or the receiving shell are preferably provided with perforations (or openings).
  • perforation means a plurality of holes or openings in the corresponding shell. The perforations or openings can have a size in the centimeter range in order to develop an intended effect. By means of the number, arrangement and size of the corresponding perforations (or openings), the flexibility properties can be fine-tuned, ie in particular also in selected areas of the receiving shell or the carrier shell, which are decisive for certain parts of the back.
  • the perforations are preferably circular or polygonal, in particular hexagonal. In particular, they can vary over the height of the backrest of a chair with regard to their size and/or orientation in order to set the flexibility properties as desired.
  • the locking element comprises a rod-shaped element, preferably with a quasi-round cross section, which is formed from an elastically bendable plastic material.
  • a rod-shaped element preferably with a quasi-round cross section, which is formed from an elastically bendable plastic material.
  • the locking element can be inserted and passed through the through-channel particularly well, i.e. in particular also in the area of curves in the edge area of the support arrangement or the backrest.
  • plastic rods can be made sufficiently robust to be able to absorb a suitable load.
  • the carrier shell and the receiving shell preferably have a convex curvature at least in the edge area, i.e. the curvature is aligned towards the back of a user in order to be able to provide appropriate support, particularly in the lumbar region.
  • Another aspect of the invention relates to a chair with a seat mounted on a seat support and a backrest support attached to the seat support, with a support arrangement according to the invention being mounted on the backrest support.
  • the chair can in particular be an office chair or a work chair.
  • FIG. 1 shows an exploded view of a support arrangement according to the invention with a carrier shell, receiving shell and locking element;
  • FIG. 3 shows a detailed view of a side area of a support arrangement according to the invention in the assembled state
  • Fig. 4 a perspective sectional view along the line A - A in Fig. 3;
  • Fig. 5 a plane sectional view along the line A - A in Fig. 3;
  • Fig. 6 a perspective sectional view along the line B - B in Fig. 3;
  • Fig. 7 a plane sectional view along the line B - B in Fig. 3;
  • Figure 8 is a perspective view of a chair incorporating a backrest support assembly in accordance with the present invention.
  • a support assembly 10 according to the present invention is shown in an exploded view.
  • the main components of the support arrangement 10 are a carrier shell 1, a receiving shell 2 and two locking elements 3 for mounting the receiving shell 2 on the carrier shell 1.
  • the carrier shell 1 is generally designed as a hard or less flexible injection-molded part.
  • the receiving shell 2 is regularly designed as a rather soft and flexible but dimensionally stable injection molded part—preferably in the form of a flexible matrix—on which a user leans his back.
  • the receiving shell 2 serves in particular to provide flexibility properties which can be tailored to selected areas of the back.
  • the rod-shaped locking elements 3 are made of a flexible plastic material and are used to mount the receiving shell 2 on the carrier shell 1.
  • the receiving shell 2 and the carrier shell 1 have a concave curvature in the horizontal at least in sections.
  • the receiving shell 2 comprises an upper part 13, which is optionally configured in the form of a head and/or neck rest.
  • the receiving shell 2 has essentially circular perforations or openings 9′, which are used to adjust the flexibility and as ventilation openings.
  • the receiving shell 2 has a bead 7 as a connecting structure, in which openings 8 spaced apart from one another are introduced.
  • the support shell 1 On its underside, the support shell 1 has recesses 11 which are used for mounting the Support assembly 10 serve as a backrest support of a chair.
  • the receiving shell 2 has notches 19 arranged centrally on its underside, which are used to fix the receiving shell 2 to the carrier shell 1 .
  • the carrier shell 1 has two tabs 18 on its upper side, which can be mounted on the upper part 13 of the receiving shell 2 .
  • the lugs 18 are used to support the receiving tray 2 so that it cannot buckle under load in the upper lateral area.
  • the carrier shell 1 preferably has hexagonal perforations or openings 9, which here, to a lesser extent than in the case of the receiving shell 2, are used to set flexibility properties and also as ventilation openings.
  • the carrier shell 1 also has an essentially straight or non-curved central section 12 .
  • the carrier shell 1 preferably comprises hook-like claws 6, which protrude laterally outwards from the carrier shell 1 and which are configured to be inserted into the corresponding openings 8 of the bead 7 in the edge regions 4' of the receiving shell 2 for assembly purposes .
  • the support arrangement 10 according to the invention is also particularly suitable for tool-free assembly at home.
  • FIG 2 a fully assembled support assembly 10 is illustrated.
  • the locking element 3 is now located between the claws 6 in the edge area 4' of the receiving shell 2 and the bead 7 or the openings 8 in the edge area 4 of the carrier shell 1.
  • the support arrangement 10 can thus be mounted in the area of the recesses 11 on a corresponding backrest support of a seat device, such as a work or office chair.
  • FIG 3 shows a section of a lateral area of the assembled support arrangement 10 with a section line AA and a section line BB.
  • the section line AA runs through the bead 7, one of the openings 8 in the bead 7, through one of the claws 6 and the locking element 3 and through one of the perforations 9 of the receiving shell 2.
  • the cutting line B - B runs somewhat further above through the bead 7 (in the area between two openings 8), the locking element 3 and through part of the receiving shell 2 or the carrier shell 1.
  • the perspective sectional view along the line AA according to FIG. 4 illustrates the engagement of one of the claws 6 of the carrier shell 1 in a bead 7 or an opening 8 in the bead 7 of the receiving shell 2.
  • the claw 6 shown in section has the following structure, like the other claws 6: At its outer upper end, the claw 6 has an engagement area 6a, which is adjoined by a first connection area 6b. The first connection area 6b is in turn adjoined by a support area 6c, which has a holding element 6d, with which it forms a notch 16d.
  • the parts of the bead 7 shown in section (the section runs through an opening 8) comprise a receiving area 7c with a notch 17c.
  • the bead 7 comprises a bearing projection 7a, which is followed by a perforation 9'.
  • the interaction of the individual parts or sections of the bead 7 and the claws 6 is as follows:
  • the engagement area 6a engages in the notch 17c of the receiving area 7c.
  • the first connecting area 6b forms a semicircle 16b as a partial curvature, which in any case partially surrounds the locking element 3 .
  • the notch 16d formed by the support area 6c and the holding element 6d accommodates the support projection 7a.
  • the holding element 6d is designed in such a way that it forms a stop or a (substantially horizontal) path limitation for the support projection 7a, which is at least partially accommodated in the notch 16d.
  • the planar sectional view according to FIG. 5 illustrates in particular the lateral travel limit Wz of the receiving tray 2.
  • the stop surfaces of the support projection 7a and the holding element 6d shown in circles form the lateral travel limit Wz of the receptacle 2 in the event of a tensile load .
  • the perspective sectional view along line BB according to FIG. 6 illustrates the interaction of a bead 7 of the receiving shell 2 with one of the claws 6 of the carrier shell 1.
  • the side wall 7d of the bead 7 comprises the second connecting area 7b, which forms a semicircle 17b as a partial rounding, which in any case partially surrounds the locking element 3, and together with the first connecting area 6 or its semicircle, which cannot be seen here, a section of the through-channel 5 for the locking element 3 forms.
  • a substantially vertical contact projection 7e adjoins the second connecting region 7b.
  • the area shown in section between the claws 6 includes a contact area 6e.
  • a holding element 6d and, above the locking element 3, a first connecting region 6b of a claw 6 can be seen behind the sectional plane.
  • FIG. 7 illustrates in particular the rear travel limitation WD of the receiving shell 2.
  • the receiving shell 2 is subjected to a pressure load in the direction of the arrow FD - i.e. the essentially backward-directed force component when, for example, a user leans back in the receiving shell 2 - form the circled stop faces of the contact projection 7e and the contact area 6e the rear travel limit WD of the receiving shell in the event of a pressure load.
  • the holding element 6d preferably does not come into contact with the inner wall of the carrier shell 1.
  • FIG. 8 an exemplary chair 20 with a support arrangement 10 according to the invention is illustrated.
  • the chair 20 includes two armrests 21, a seat 22, which is mounted on a seat support 25 and a star-shaped foot part 23 which is arranged below the seat support and has a plurality of rollers 26 .
  • a backrest support 24 is also attached, on which the support arrangement 10 according to the invention is mounted.
  • the flexible receiving shell 2 is mounted on the fixed carrier shell 1 by means of the locking element 3 .

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)

Abstract

L'invention concerne un système d'appui pour un siège, comprenant une coque de support, une coque de réception pouvant être montée sur la coque de support et un élément de verrouillage. La coque de support et la coque de réception présentent chacune dans une zone de bord des structures d'assemblage réalisées de manière complémentaire les unes par rapport aux autres. Ces structures d'assemblage sont configurées pour s'emboîter les unes dans les autres à l'état monté de manière à former un canal de passage dans lequel l'élément de verrouillage peut être introduit.
EP22700376.1A 2021-01-12 2022-01-11 Système d?appui Pending EP4277498A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00020/21A CH718248A1 (de) 2021-01-12 2021-01-12 Stützanordnung für einen Stuhl.
PCT/EP2022/050378 WO2022152664A1 (fr) 2021-01-12 2022-01-11 Système d'appui

Publications (1)

Publication Number Publication Date
EP4277498A1 true EP4277498A1 (fr) 2023-11-22

Family

ID=74591697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22700376.1A Pending EP4277498A1 (fr) 2021-01-12 2022-01-11 Système d?appui

Country Status (4)

Country Link
US (1) US20240057782A1 (fr)
EP (1) EP4277498A1 (fr)
CH (1) CH718248A1 (fr)
WO (1) WO2022152664A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4996240B2 (ja) * 2006-08-30 2012-08-08 株式会社イトーキ 椅子
JP2009011694A (ja) * 2007-07-09 2009-01-22 Itoki Corp 椅子の背もたれ又は座及び椅子
AT509166A3 (de) * 2009-04-06 2018-07-15 Kobleder Holding Gmbh Möbelstück sowie bespannung dafür
US10182657B2 (en) 2016-02-12 2019-01-22 Haworth, Inc. Back support for a chair
JP6483762B2 (ja) * 2017-07-18 2019-03-13 中央可鍛工業株式会社 椅子の背凭れ装置及び椅子

Also Published As

Publication number Publication date
US20240057782A1 (en) 2024-02-22
CH718248A1 (de) 2022-07-15
WO2022152664A1 (fr) 2022-07-21

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