EP3893696A1 - Lordosenstützvorrichtung für ein sitzmöbel und sitzmöbel mit einer lordosenstützvorrichtung - Google Patents
Lordosenstützvorrichtung für ein sitzmöbel und sitzmöbel mit einer lordosenstützvorrichtungInfo
- Publication number
- EP3893696A1 EP3893696A1 EP19818014.3A EP19818014A EP3893696A1 EP 3893696 A1 EP3893696 A1 EP 3893696A1 EP 19818014 A EP19818014 A EP 19818014A EP 3893696 A1 EP3893696 A1 EP 3893696A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- support device
- lumbar support
- linear drive
- sliding blocks
- motor
- 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.)
- Granted
Links
- 102000004315 Forkhead Transcription Factors Human genes 0.000 claims description 9
- 108090000852 Forkhead Transcription Factors Proteins 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 108090000623 proteins and genes Proteins 0.000 claims 1
- 210000003128 head Anatomy 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 208000007623 Lordosis Diseases 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 210000004705 lumbosacral region Anatomy 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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
Definitions
- Lumbar support device for seating furniture and seating furniture with one
- the invention relates to a lumbar support device for seating with an electric motor drive.
- the invention further relates to a piece of seating furniture, in particular an armchair, with such a lumbar support device.
- Lumbar support devices are e.g. of seating, for example chairs, in particular 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.
- adjustable lumbar support devices are known, the support effect of which can be adjusted by extending a support element more or less towards the back of the user.
- lumbar supports operated by an electric motor are common.
- a known embodiment of a lumbar support device which can be extended in this way by an electric motor uses a horizontally extending profile rail behind the back padding, on which two sliding elements are guided so as to be movable towards and away from one another.
- the sliding elements are connected to a v-shaped lever mechanism, such that when the sliding elements move towards one another, a tip of the v-shaped lever mechanism moves in the direction of the back cushioning.
- a flat support element is formed at this tip of the v-shaped lever mechanism, which acts as a lumbar support element via the padding.
- an electric motor drive usually a linear drive
- This further right lever mechanism uses, among other things, a lever on both sides to enable movement in the different directions, ie towards or away from each other. It is an object of the present invention to describe a lumbar support device of the type mentioned at the outset, which is driven by an electric motor and has a simpler and therefore less expensive and maintenance-free construction. It is another object to create seating with an easily mountable lumbar support device.
- Figure 1 a, b each is an isometric view of a back of a partially shown seating with a lumbar support device from different viewing directions;
- FIGS. 1 a, b a plan view of the lumbar support device of FIGS. 1 a, b in different operating positions;
- Fig. 3a-3c three different configurations of a motor-side fastening element for a lumbar support device.
- Fig. 4a, b, 5a, b, 6a, b three different configurations of guide profile side fasteners for a lumbar support device in an open and a closed to stand.
- FIG. 1 a and 1 b each show an isometric view of a back part 1 of an armchair that is otherwise not 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 of the seating furniture pointing away from the seat, not shown here. It is usually covered with a stretched cloth or similar upholstery fabric.
- the back part 1 has a frame 2 which comprises two side cheeks 3. On the side facing away from the user in FIGS. 1 a and 1 b, the frame 2 defines an upholstery surface level 4. This level is, possibly supported by transversely extending support elements, a cushion layer of the back part angeord net.
- a lordosis support device 10 is installed in the lower region of the frame 2 and thus also in the lower region of the upholstery surface level 4.
- 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 transmission unit 111 in a motor-side fastening element 15 on one of the side walls 3 and on the opposite side with the end of its guide profile 112 in a guide-side fastening element 16 on the opposite side wall 3.
- the guide profile 112 is a square profile on which two sliding blocks 113, 114 with corresponding openings are placed, which can be moved horizontally on the guide profile 112 accordingly.
- the guide profile 112 is open to one side, for example downwards or forwards (i.e. towards the seat surface of the armchair), a respective section of the sliding blocks 113, 114 projecting into the interior of the guide profile 112.
- a spindle rotatably driven by the motor and gear unit 111 extends along the substantially entire length of the guide profile 112.
- the spindle engages in spindle nuts which are connected to the sliding blocks 113, 114 in a rotationally fixed manner or integrally with these sliding blocks 113, 114 are formed.
- the spindle has two threaded sections which 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 correspond to the range of movement of the sliding blocks 113, 114, whose spindle nut is also formed with left or right-hand thread.
- the lumbar support device 10 further comprises a lever mechanism 12, via which the sliding blocks 113, 114 act on a common axis 13.
- a lever mechanism 12 via which the sliding blocks 113, 114 act on a common axis 13.
- a triangular arrangement is thus formed between the sliding blocks 113, 114 and the axis 13.
- a support element 14 is fastened to the axis 13 and bears with a support surface against the cushion of the back part, not shown here, and which corresponds to the movement of the sliding blocks 113,
- the lumbar support device 10 which is used in the armchair according to FIGS. 1 a and 1 b, is shown in more detail and separately from the back part 1 in a top view.
- the support member 14 of the lord sensen device 10 and in Fig. 2b substantially maximally ausah ren.
- the comparison of the two figures shows the synchronous movement of the sliding blocks 113, 114 towards and away from one another.
- the two upper levers 121, 122 which connect the respective sliding block 113, 114 to the axle 13, are shown separately from the lever mechanism 12.
- the levers 121, 122 are pivotally mounted on the sliding blocks 113, 114 in pivot bearings 123, 124.
- the lower levers move congruently with the illustrated upper levers 121, 122 and are therefore not visible in the illustration in FIGS. 2a and 2b.
- FIGS. 2a and 2b it can also be seen that the support element 14, which presses into the upholstery of the back part 1 during its movement, is arched in order to avoid uncomfortably protruding edges in the back area of the user.
- the motor and transmission unit 111 is arranged on one side of the guide profile 112.
- the motor and gear unit 111 is arranged in the center or approximately in the center, so that sections of the guide profile 112 extend to both sides of the motor and gear unit.
- a first spindle (or a first spindle section) then projects from the motor and transmission unit 111. cut 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. It can be two independent spindles or a continuous spindle.
- the two spindles with the same thread type ie both with right-hand thread or both with left-hand thread, can be formed, in which case the spindles are rotated synchronously in different directions by the motor and gear unit 111.
- the motor and gear unit 111 can have an electric motor with a worm, a worm wheel arranged on the spindle or spindles being driven by the motor via the worm mentioned.
- the lumbar support device 10 shown in FIGS. 1 a, b and 2a, b requires, apart from the levers 121, 122 of the lever mechanism 12, no further levers or devices which serve for a synchronous movement of the sliders 113, 114. Accordingly, a compact structure is achieved.
- the fact that there are no further moving elements means that there is also no clamping or
- the lumbar support device 10 shown can also be mounted in a very simple manner in the frame 2 according to FIGS. 1 a and 1 b.
- the lumbar support device 10 has a motor-side fastening fork head 115.
- the guide profile 112 is closed with a profile end cover 116.
- only one motor-side fastening element 15 and one fastening element 16 on the guide profile side, in which the lumbar support device 10 is inserted and fastened, are to be attached to the two opposite side cheeks 3. Details on the assembly of the lumbar support device 10 are explained below in connection with FIGS. 3a to 6b.
- 3a-3c three configurations of engine-side fastening elements 15 are each shown in more detail in an isometric illustration.
- 3a shows a first exemplary 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 mounting element 151 shown on the engine side is screwed onto its side plate in a simple manner with its mounting plate 151 using, for example, wood screws.
- the lumbar support device 10 is inserted with its motor-side fastening fork head 115, the end-side profile end cover 116 of the guide profile 112, however, still being held outside the back part 1.
- the lumbar support device 10 can then be pivoted into the correct position. This is described in more detail in connection with exemplary embodiments of the fastening element 16 on the guide profile side in FIGS. 4a, b, 5a, b and 6a, b.
- FIG. 3b shows a further embodiment for the fastening on the motor side.
- the motor-side fastening fork head 115 has a vertical central bore in the installed position. Therefore, an angle with an eyelet projecting at right angles from the side wall 3 can be used for fastening to the side wall 3 and can also be seen in FIG. 1 b.
- a bore of the eyelet and the bores of the mounting fork head 115 are brought into alignment with one another and a fastening pin 154, as shown in FIG. 3b, is inserted.
- the fastening pin 154 has at one end a laterally projecting head 155 and at the opposite end latching elements 156.
- the latching elements 156 are, for example, as shown as snap noses, an incision in the fastening pin 154 allowing the latching elements 156 to be pressed in.
- the fastening pin 154 can be inserted from above into the bore of the fastening fork head 115 and locks in place without tools and thus fixes the lumbar support device 10. As described in conjunction with FIG. 3, this can then be pivoted horizontally into the opposite fastening element 16 on the guide profile side, whoever uses it.
- FIG. 3c A third embodiment of an engine-side fastening element 15 is shown in FIG. 3c.
- This in turn has a mounting plate 151 on which a bracket 157 protruding from it is formed.
- a fastening supply pin 154 is mounted or integrally formed with the console 157, the Except for the head 155 corresponds essentially to that shown in Fig. 3b.
- This fastening pin 154 also has latching elements 156 at its end, here the free end which stands up.
- the lumbar support device 10 can be plugged onto the pin 154 with its fastening fork head 115 until the latching elements 156 engage. This is then followed by the previously described pivoting into the fastening element 16 on the guide profile side.
- FIG. 4a, b, 5a, b and 6a, b three different configurations of a guide element-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 fastening element 16 on the guide profile side in an open state and the figures with the addition “b” in a closed state.
- a base body 161 which can be screwed to the side wall 3 of the back part 1 by means of screws through fastening holes.
- a perpendicular to the Sowan ge 3 and rearward (based on the back part 1) open receptacle 162 is formed on the base body 161 .
- the end of the guide profile 112 with the profile end cover 116 can be inserted into this receptacle 162, in particular pivoted in.
- 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.
- latching elements 163 are formed, in the present case with latching lugs, in which the locking bolt 164 engages with openings 165.
- FIGS. 5a and 5b of a fastener 16 on the guide profile side corresponds in its basic structure to that shown in FIGS. 4a, b.
- the locking bolt 164 is connected on one side to the base body 161 via a hinge 166, preferably a film hinge.
- the fastening element 16 on the guide profile side can thus be produced in one piece before, 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 happens through a combination of locking element 163 and opening 165.
- FIGS. 6a and 6b A third embodiment of a fastening element 16 on the guide profile side is shown in FIGS. 6a and 6b.
- the base body 161 is formed comparably bar with the previously described embodiments.
- a closure element comparable to the locking bolt 164, which in this exemplary embodiment is designed as a metallic clamp 167 with bent end sections 168.
- slots 169 are made for receiving the clip 167, into which the clip 167 is inserted.
- the direction of insertion is in the longitudinal direction of the guide profile 112. In a direction transverse to it, that is to say in the direction in which the guide profile 112 is pivoted in, the clip is fastened by being inserted into the slots 169 by positive locking.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
Claims
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 (de) | 2018-12-10 | 2019-12-06 | Lordosenstützvorrichtung für ein sitzmöbel und sitzmöbel mit einer lordosenstützvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3893696A1 true EP3893696A1 (de) | 2021-10-20 |
EP3893696B1 EP3893696B1 (de) | 2024-07-31 |
Family
ID=68848257
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19818014.3A Active EP3893696B1 (de) | 2018-12-10 | 2019-12-06 | Sitzmöbel mit einer lordosenstützvorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US11986101B2 (de) |
EP (1) | EP3893696B1 (de) |
CN (1) | CN113194791A (de) |
DE (1) | DE202018107033U1 (de) |
WO (1) | WO2020120336A1 (de) |
Families Citing this family (1)
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 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2035071A (en) * | 1978-11-18 | 1980-06-18 | Uop Inc | Seat having a movable lumbar support |
US4295681A (en) * | 1980-02-19 | 1981-10-20 | Uop Inc. | Seat having lumbar support and vertical height adjustment mechanism therefor |
JPH0675530B2 (ja) | 1983-10-14 | 1994-09-28 | ウインクル・グレ−ム・ジョン | 改良された背支持手段 |
GB2194729B (en) * | 1986-09-04 | 1990-03-14 | Gen Motors Corp | Improved vehicle headrest |
AUPM314693A0 (en) * | 1993-12-24 | 1994-01-27 | Henderson's Industries Pty Ltd | Adjustable lumbar support |
DE4432615A1 (de) * | 1994-09-14 | 1996-03-21 | Sachsenpolster Gmbh | Umwandelbares Sitz-Liegemöbel |
US5553919A (en) * | 1994-10-11 | 1996-09-10 | Excellence Lumbar Corporation | Scissor jack lumbar support |
DE10111653B4 (de) * | 2001-03-12 | 2006-12-21 | Bertrandt Ingenieurbüro GmbH | Rückenlehne für einen Fahrzeugsitz |
KR100462492B1 (ko) * | 2002-03-18 | 2004-12-17 | 현대자동차주식회사 | 자동차용 럼버서포트 장치 |
DE20313925U1 (de) * | 2003-09-04 | 2004-10-07 | Brose Fahrzeugteile Gmbh & Co. Kg, Coburg | Rückenlehnenstruktur für einen Kraftfahrzeugsitz |
US7448684B2 (en) | 2005-06-28 | 2008-11-11 | Chen Hsing Enterprise Co., Ltd. | Backrest adjustment device |
GB0605960D0 (en) * | 2006-03-24 | 2006-05-03 | Galley Geoffrey H | Expandable spinal prosthesis |
DE102008047248A1 (de) * | 2008-09-10 | 2010-03-11 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Spindelantrieb für eine Lordosenstütze in der Rückenlehnenstruktur eines Kraftfahrzeugsitzes |
DE102008047249A1 (de) * | 2008-09-10 | 2010-03-11 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg | Rückenlehnenstruktur für einen Kraftfahrzeugsitz |
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 |
DE202017104716U1 (de) * | 2017-08-07 | 2018-11-09 | Armin Sander | Sitzmöbel, insbesondere Bürostuhl, sowie Rückenlehne |
US10952535B2 (en) * | 2018-11-05 | 2021-03-23 | La-Z-Boy Incorporated | Furniture member having lumbar adjustment mechanism |
-
2018
- 2018-12-10 DE DE202018107033.9U patent/DE202018107033U1/de active Active
-
2019
- 2019-12-06 CN CN201980082120.1A patent/CN113194791A/zh active Pending
- 2019-12-06 US US17/312,318 patent/US11986101B2/en active Active
- 2019-12-06 EP EP19818014.3A patent/EP3893696B1/de active Active
- 2019-12-06 WO PCT/EP2019/084075 patent/WO2020120336A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
US11986101B2 (en) | 2024-05-21 |
US20220022655A1 (en) | 2022-01-27 |
EP3893696B1 (de) | 2024-07-31 |
CN113194791A (zh) | 2021-07-30 |
DE202018107033U1 (de) | 2020-03-11 |
WO2020120336A1 (de) | 2020-06-18 |
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