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EP3893696B1 - Meuble pour s'asseoir comportant un dispositif d'appui dorsolombaire - Google Patents

Meuble pour s'asseoir comportant un dispositif d'appui dorsolombaire Download PDF

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Publication number
EP3893696B1
EP3893696B1 EP19818014.3A EP19818014A EP3893696B1 EP 3893696 B1 EP3893696 B1 EP 3893696B1 EP 19818014 A EP19818014 A EP 19818014A EP 3893696 B1 EP3893696 B1 EP 3893696B1
Authority
EP
European Patent Office
Prior art keywords
support device
lumbar support
motor
sliding blocks
guide profile
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.)
Active
Application number
EP19818014.3A
Other languages
German (de)
English (en)
Other versions
EP3893696A1 (fr
Inventor
Sascha Koltzenburg
Matthew WAFLER
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.)
Dewertokin Technology Group Co Ltd
Original Assignee
Dewertokin Technology Group Co Ltd
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 Dewertokin Technology Group Co Ltd filed Critical Dewertokin Technology Group Co Ltd
Publication of EP3893696A1 publication Critical patent/EP3893696A1/fr
Application granted granted Critical
Publication of EP3893696B1 publication Critical patent/EP3893696B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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—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 invention relates to a piece of seating furniture with a back part in which a lumbar support device with an electromotive linear drive is arranged, according to the preamble of claim 1.
  • Lumbar support devices are known from seating furniture, for example chairs, especially office chairs and armchairs. Lumbar support devices are intended to support the natural curvature of the lumbar spine of a user of the seating furniture towards the abdomen. In addition to static lumbar support devices, which are incorporated into the backrest of the seating furniture in the form of corresponding curvatures, adjustable lumbar support devices are known, the support effect of which can be adjusted by extending a support element more or less far towards the user's back.
  • Electric motor-operated lumbar supports are particularly common in larger pieces of furniture with correspondingly more voluminous upholstery, i.e. armchairs in particular.
  • a known embodiment of such an electric motor-operated lumbar support device uses a horizontally transverse profile rail behind the back upholstery, on which two sliding elements are guided so that they can move towards and away from each other.
  • the sliding elements are connected to a V-shaped lever mechanism in such a way that when the sliding elements move towards each other, one tip of the V-shaped lever mechanism moves in the direction of the back upholstery.
  • At this tip of the V-shaped lever mechanism is a flat support element that acts as a lumbar support element via the upholstery.
  • an electric motor drive specifically a linear drive
  • This additional lever mechanism uses, among other things, a lever on both sides to enable movement in different directions, ie towards or away from each other.
  • a spindle-driven scissor lift is used to operate the V-shaped lever mechanism that is connected to the support element. In both cases, the use of two coupled lever mechanisms results in a complex and therefore not service-friendly and not very compact structure.
  • a vehicle seat with a lumbar support device with a linear drive in which the linear drive has a guide profile on which two sliding blocks, each with a spindle nut coupled by at least one spindle, can be moved synchronously towards or away from each other, wherein the spindle has two sections, one of which is provided with a left-hand thread and the other with a right-hand thread. Each section is assigned one of the sliding blocks, wherein a bracket is pivoted as a lumbar support in the back section by the sliding blocks.
  • the guide profile is arranged on a mounting plate which is screwed into a seat frame or can itself be vertically adjusted in height by another linear adjustment.
  • the lumbar support device is thus compactly integrated into the back section, but it is difficult to access for assembly and for service or repair purposes.
  • the lumbar support device has an electromotive linear drive which is coupled to an extendable support element via a lever mechanism, wherein the linear drive is a Has a guide profile on which two sliding blocks, each with a spindle nut coupled by at least one spindle, can be moved synchronously towards or away from each other, wherein the spindle has two sections, one of which is provided with a left-hand thread and the other with a right-hand thread, and each section is assigned one of the sliding blocks, and wherein the sliding blocks are each connected to the support element via at least one lever.
  • the linear drive has a motor and gear unit for driving the spindle, wherein the guide profile is fastened to the motor and gear unit with an end section.
  • the back part has two side cheeks, between which the linear drive of the lumbar support device is arranged.
  • the seating furniture is characterized in that a motor-side fastening element is mounted on one of the side cheeks, to which the linear drive is pivotably fastened with a motor-side fastening fork head, and that a guide profile-side fastening element is mounted on the other of the side cheeks, into which the linear drive can be pivoted and fastened with an end section of its guide profile.
  • FIG. 1a and 1b an isometric view of a back part 1 of an otherwise not further shown armchair is shown as an example of a piece of seating furniture.
  • the side of the back part 1 facing the viewer in the figures is the rear side pointing away from the seat surface not shown here.
  • Side of the seating furniture It is usually covered with a stretched cloth or a similar upholstery material.
  • the backrest 1 has a frame 2 which includes two side panels 3.
  • the side panels 3 allow the user to Fig. 1a and 1b
  • the frame 2 defines a cushion surface level 4. On this level, possibly supported by transverse support elements, a padding layer of the back part.
  • a lumbar support device 10 In the lower area of the frame 2 and thus also in the lower area of the cushion surface level 4, a lumbar support device 10 according to the application is installed.
  • This comprises a linear drive 11, which in turn has a motor and gear unit 111 and a guide profile 112 attached to it.
  • the lumbar support device 10 is mounted on the side of the motor and gear unit 111 in a motor-side fastening element 15 on one of the side cheeks 3 and on the opposite side with the end of its guide profile 112 in a guide profile-side fastening element 16 on the opposite side cheek 3.
  • the guide profile 112 is a square profile onto which two sliding blocks 113, 114 with corresponding openings are placed, which can be moved horizontally on the guide profile 112.
  • the guide profile 112 is open on one side, for example downwards or forwards (i.e. in the direction of the seat of the chair), with a respective section of the sliding blocks 113, 114 protruding into the interior of the guide profile 112.
  • a spindle rotatably driven by the motor and gear unit 111 is arranged along essentially the entire length of the guide profile 112.
  • the spindle engages in spindle nuts which are connected in a rotationally fixed manner to the sliding blocks 113, 114 or are formed integrally with these sliding blocks 113, 114.
  • the spindle has two thread sections that are provided with differently oriented threads, ie with a left-hand thread in a first spindle section and a right-hand thread in a second spindle section.
  • the spindle sections each correspond to the range of movement of the sliding blocks 113, 114, whose spindle nut is also designed with a left-hand or right-hand thread.
  • the sliding blocks 113, 114 move towards or away from each other when the spindle rotates. Due to the same thread pitch in the two spindle sections mentioned, this movement takes place synchronously, as in connection with the Fig. 2a and 2b is explained in more detail.
  • the lumbar support device 10 further comprises a lever mechanism 12, via which the sliding blocks 113, 114 act on a common axis 13.
  • Two levers are arranged between the respective sliding block 113, 114 and the axis 13, one on the top and one on the bottom of the sliding blocks 113, 114. This creates a triangular arrangement between the sliding blocks 113, 114 and the axis 13.
  • a support element 14 is attached to the axis 13, which rests with a support surface on the upholstery of the back part (not shown here) and which is moved in the direction of the upholstery layer or into the upholstery layer according to the movement of the sliding blocks 113, 114.
  • Fig. 2a and 2b is the lumbar support device 10, which is provided in the armchair according to Fig. 1a and 1b is used, shown in more detail and separately from the back part 1 in a top view.
  • the support element 14 of the lumbar support device 10 is inserted and in Fig. 2b essentially extended to its maximum.
  • the comparison of the two figures shows the synchronous movement of the sliding blocks 113, 114 towards and away from each other.
  • the two upper levers 121, 122 of the lever mechanism 12 are shown separately, which connect the respective sliding block 113, 114 with the axis 13.
  • the levers 121, 122 are pivotably mounted on the sliding blocks 113, 114 in pivot bearings 123, 124.
  • the lower levers move congruently with the upper levers 121, 122 shown and are therefore shown in the illustration of the Fig. 2a and 2b not visible. Due to the synchronous movement of the sliding blocks 113, 114, the axis 13 moves along a line that runs perpendicular to the guide profile 112.
  • the motor and gear unit 111 is arranged on one side of the guide profile 112.
  • One of the sliding blocks 113, 114 is guided on each of the sections.
  • a first spindle (or a first spindle section) then protrudes from the motor and gear unit 111. with a left-hand thread in one and a second spindle (or a second spindle section) with a right-hand thread in the other guide profile section.
  • the motor and gear unit 111 can have an electric motor with a worm, wherein a worm wheel arranged on the spindle(s) is driven by the motor via said worm.
  • the Fig. 1a , b and 2a, b The lumbar support device 10 shown does not require any other levers or devices other than the levers 121, 122 of the lever mechanism 12 to synchronize the movement of the sliders 113, 114. Accordingly, a compact structure is achieved. The fact that there are no other moving elements also reduces the risk of objects being trapped or crushed by the Fig. 1a and 1b invisible cover of the back part 1 could be pressed into the area of the lumbar support device 10.
  • the illustrated lumbar support device 10 can also be very easily integrated into the frame 2 according to the Fig. 1a and 1b
  • the lumbar support device 10 has a motor-side fastening fork head 115.
  • the guide profile 112 is closed with a profile cover 116.
  • only one motor-side fastening element 15 and one guide profile-side fastening element 16 are to be attached to the two opposite side cheeks 3, into which the lumbar support device 10 is inserted and fastened. Details on the assembly of the lumbar support device 10 are given below in connection with the Fig. 3a to 6b explained.
  • FIG. 3a-3c three designs of engine-side fastening elements 15 are shown in more detail in an isometric representation.
  • Fig. 3a shows a first embodiment in which a frame-shaped attachment 152 is arranged or formed on a mounting plate 151.
  • the frame-shaped attachment 152 circumscribes a semi-cylindrical recess 153.
  • the motor-side fastening element 15 shown is easily screwed onto one of the side walls with its mounting plate 151 using wood screws, for example.
  • the lumbar support device 10 is inserted with its motor-side fastening fork head 115, whereby the end profile cover 116 of the guide profile 112 is still held outside the back part 1.
  • the lumbar support device 10 can then be swiveled into the correct position. This will be explained in more detail in connection with embodiments of the guide profile-side fastening element 16 in the Fig. 4a, b , 5a, b and 6a, b described.
  • Fig. 3b shows a further design for the engine-side mounting.
  • the engine-side fastening fork head 115 has a vertical central hole in the installed position. Therefore, an angle with an eyelet protruding at right angles from the side wall 3 can be used for fastening to the side wall 3, which can also be used in Fig. 1b is visible.
  • a hole in the eyelet and the holes in the fastening fork head 115 are aligned and a fastening pin 154 is inserted, as shown in Fig. 3b shown.
  • the fastening pin 154 has a laterally protruding head 155 at one end and locking elements 156 at the opposite end.
  • the locking elements 156 are designed as locking lugs, for example, as shown, with a cut in the fastening pin 154 allowing the locking elements 156 to be pressed in.
  • the fastening pin 154 can be inserted from above into the hole in the fastening fork head 115 and locks in place without tools, thereby fixing the lumbar support device 10. This can be done as in connection with Fig.3 described then pivoted horizontally into the opposite guide profile side fastening element 16.
  • FIG. 3c A third embodiment of a motor-side fastening element 15 is shown in Fig. 3c This in turn has a mounting plate 151 on which a protruding bracket 157 is formed.
  • a fastening pin 154 is mounted on the bracket 157 or is formed in one piece with the bracket 157, the except for the head 155 essentially the Fig. 3b shown.
  • This fastening pin 154 also has locking elements 156 at its end, here the free end pointing upwards.
  • the lumbar support device 10 can be plugged onto the pin 154 with its fastening fork head 115 until the locking elements 156 engage. The previously described pivoting into the fastening element 16 on the guide profile side then takes place again.
  • FIG. 4a, b , 5a, b and 6a, b Three different designs of a guide profile-side fastening element 16 for the previously shown lumbar support device 10 are shown in isometric representations.
  • the figures with the addition “a” show the guide profile-side fastening element 16 in an open state and the figures with the addition “b” show it in a closed state.
  • the guide profile-side fastening element 16 has in a first example according to Fig. 4a, b a base body 161, which can be screwed to the side cheek 3 of the back part 1 with the aid of screws through fastening holes.
  • a receptacle 162 is formed on the base body 161, which is open perpendicular to the side cheek 3 and to the rear (in relation to the back part 1).
  • the end of the guide profile 112 with the profile end cover 116 can be inserted, in particular pivoted, into this receptacle 162.
  • a locking bolt 164 is placed on the base body 161, which then fixes the guide profile 112 in the assembly position of the lumbar support device 10.
  • the base body 161 has locking elements 163, in this case again with locking lugs, into which the locking bolt 164 engages with openings 165.
  • the locking connection can be released by hooking underneath, for example with a screwdriver, if the lumbar support device 10 has to be removed again.
  • the second embodiment of a guide profile-side fastening element 16 shown corresponds in its basic structure to that shown in the Fig. 4a, b shown.
  • the locking bolt 164 is connected to the base body 161 on one side via a hinge 166, preferably a film hinge.
  • the fastening element 16 on the guide profile side can thus preferably be manufactured in one piece, for example in a plastic injection molding process.
  • the locking bolt 164 is pivoted until it is on the side opposite the hinge 166 locked, which in turn is done by a combination of locking element 163 and opening 165.
  • a third embodiment of a guide profile-side fastening element 16 is shown in the Fig. 6a and 6b shown.
  • the base body 161 is again designed in a manner comparable to the previously described embodiments.
  • a locking element is also provided, which in this embodiment is designed as a metal clamp 167 with bent end sections 168. Slots 169 are made in the base body 161 to accommodate the clamp 167, into which the clamp 167 is inserted.
  • the insertion direction is in the longitudinal direction of the guide profile 112. In a direction transverse to this, i.e. in the direction in which the guide profile 112 is pivoted in, the clamp is secured by being pushed into the slots 169 by means of a positive fit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (6)

  1. Siège d'ameublement avec une partie de dossier (1) dans laquelle est disposé un dispositif de protection anti-lordose (10) avec un entraînement linéaire à moteur électrique (11), dans lequel l'entraînement linéaire à moteur électrique (11) est couplé avec un élément de soutien (14) télescopique par un mécanisme de leviers (12), dans lequel l'entraînement linéaire (11) comporte un profilé de guidage (112) sur lequel deux blocs coulissants (113, 114) sont couplés chacun à un écrou de broche et peuvent être rapprochés ou écartés de façon synchrone par au moins une broche, la broche présentant deux parties dont l'une est munie d'un filetage tournant à gauche et l'autre d'un filetage tournant à droite et un des blocs coulissants (113, 114) étant associé à chacune des parties, dans lequel les blocs coulissants sont reliés chacun par au moins un levier (121, 122) à l'élément d'appui (14), dans lequel l'entraînement linéaire (11) comporte une unité de moteur et d'engrenage (111) pour l'entraînement de la broche, dans lequel le profilé de guidage (112) est fixé par une partie d'extrémité à l'unité de moteur et d'engrenage (111) et dans lequel la partie de dossier (1) comporte deux flasques latéraux (3) entre lesquels l'entraînement linéaire (11) du dispositif de protection anti-lordose (10) est disposé, caractérisé en ce qu'un élément de fixation du côté du moteur (15), sur lequel l'entraînement linéaire (11) est fixé de façon pivotante avec une tête de fourche de fixation du côté du moteur (115), est monté sur l'un des flasques latéraux (3) et en ce qu'un élément de fixation du côté du profilé de guidage (16), dans lequel l'entraînement linéaire (11) peut être introduit en pivotant et fixé par une partie d'extrémité de son profilé de guidage (112), est monté sur l'autre des flasques latéraux (3).
  2. Siège d'ameublement selon la revendication 1, dans lequel le profilé de guidage (112) du dispositif de protection anti-lordose (10) comporte deux parties entre lesquelles l'unité de moteur et d'engrenage (111) est disposée, chacune des parties guidant l'un des blocs coulissants (113, 114).
  3. Siège d'ameublement selon la revendication 1 ou 2, dans lequel le mécanisme de leviers (12) du dispositif de protection anti-lordose (10) comprend au moins deux leviers (121, 122) disposés en V, chacun des leviers (121, 122) étant supporté à une extrémité avec possibilité de rotation sur l'un des blocs coulissants (113, 114) et chacun des deux leviers (121, 122) étant articulé par son autre extrémité avec possibilité de rotation sur l'élément d'appui (14).
  4. Siège d'ameublement selon la revendication 3, dans lequel une disposition en V de leviers (121, 122) est prévue sur des faces opposées des blocs coulissants (113, 114).
  5. Siège d'ameublement selon l'une des revendications 1 à 4, dans lequel le profilé de guidage (112) du dispositif de protection anti-lordose (10) est fermé par un couvercle de fermeture de profilé (116) à une extrémité opposée à l'unité de moteur et d'engrenage (111).
  6. Siège d'ameublement selon l'une des revendications 1 à 5, qui est conçu comme un fauteuil.
EP19818014.3A 2018-12-10 2019-12-06 Meuble pour s'asseoir comportant un dispositif d'appui dorsolombaire Active EP3893696B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018107033.9U DE202018107033U1 (de) 2018-12-10 2018-12-10 Lordosenstützvorrichtung für ein Sitzmöbel und Sitzmöbel mit einer Lordosenstützvorrichtung
PCT/EP2019/084075 WO2020120336A1 (fr) 2018-12-10 2019-12-06 Dispositif d'appui dorsolombaire pour un meuble pour s'asseoir et meuble pour s'asseoir comportant un dispositif d'appui dorsolombaire

Publications (2)

Publication Number Publication Date
EP3893696A1 EP3893696A1 (fr) 2021-10-20
EP3893696B1 true EP3893696B1 (fr) 2024-07-31

Family

ID=68848257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19818014.3A Active EP3893696B1 (fr) 2018-12-10 2019-12-06 Meuble pour s'asseoir comportant un dispositif d'appui dorsolombaire

Country Status (7)

Country Link
US (1) US11986101B2 (fr)
EP (1) EP3893696B1 (fr)
CN (1) CN113194791B (fr)
DE (1) DE202018107033U1 (fr)
DK (1) DK3893696T3 (fr)
ES (1) ES2989366T3 (fr)
WO (1) WO2020120336A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240225293A9 (en) * 2022-10-21 2024-07-11 Remacro Technology Co., Ltd. Lower-back Supporting Apparatus, Backrest Supporting Frame and Seating Unit

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US7488039B2 (en) * 2003-09-04 2009-02-10 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Motor vehicle seat back structure for a motor vehicle seat
WO2020097036A2 (fr) * 2018-11-05 2020-05-14 La-Z-Boy Incorporated Élément meuble comportant un mécanisme de réglage lombaire

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US8474909B2 (en) * 2010-09-21 2013-07-02 La-Z-Boy Incorporated Power lift lumbar support system
KR101672718B1 (ko) * 2015-02-27 2016-11-04 (주) 현대기업 4-방향 럼버 서포트
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Publication number Priority date Publication date Assignee Title
KR100462492B1 (ko) * 2002-03-18 2004-12-17 현대자동차주식회사 자동차용 럼버서포트 장치
US7488039B2 (en) * 2003-09-04 2009-02-10 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg Motor vehicle seat back structure for a motor vehicle seat
WO2020097036A2 (fr) * 2018-11-05 2020-05-14 La-Z-Boy Incorporated Élément meuble comportant un mécanisme de réglage lombaire

Also Published As

Publication number Publication date
CN113194791A (zh) 2021-07-30
CN113194791B (zh) 2024-11-05
DK3893696T3 (da) 2024-10-14
US11986101B2 (en) 2024-05-21
ES2989366T3 (es) 2024-11-26
WO2020120336A1 (fr) 2020-06-18
US20220022655A1 (en) 2022-01-27
EP3893696A1 (fr) 2021-10-20
DE202018107033U1 (de) 2020-03-11

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