EP1301107B1 - Ergonomic office chair with an extending foot - Google Patents

Ergonomic office chair with an extending foot Download PDF

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Publication number
EP1301107B1
EP1301107B1 EP01956266A EP01956266A EP1301107B1 EP 1301107 B1 EP1301107 B1 EP 1301107B1 EP 01956266 A EP01956266 A EP 01956266A EP 01956266 A EP01956266 A EP 01956266A EP 1301107 B1 EP1301107 B1 EP 1301107B1
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EP
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Prior art keywords
backrest
seat
chair
movement
chair according
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EP01956266A
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German (de)
French (fr)
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EP1301107A1 (en
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Hans Rückstädter
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs

Definitions

  • the invention relates to the coupling of a cantilever foot and the possibility of rotation with the Inclination of the backrest synchronized to the horizontal advancement of the seat surface at one Seating furniture according to the preamble of claim 1.
  • the coupling should be installed on a swivel chair. This (office) chair or seating should synchronize the inclination of the backrest with the advancement of the seat so that the Users always have almost the same distance from hands to work tools on the machine Has table surface.
  • the ergonomics of long-term sitting require changing posture.
  • the Rubber balls and swing spring seats give the body no rest and always have to be balanced.
  • the horizontal movement of the seat should be without disturbing noises and efforts function. But the advantages and dimensions of a normal swivel office chair are said to be remain as possible, at least in the normal sitting position.
  • the base of the (office) swivel chair usually consists of 5 feet with the well-known gas spring mechanism for vertical height adjustment.
  • the task regarding the seat and backrest is based on lever mechanisms that are coupled are with (too) little sliding movement, so that the center of gravity is definitely not too far gets to the front.
  • the main focus is on the sufficient sliding movement supported by small lever movements for a desired inclination of the seat could become.
  • the focus is shifted significantly forward, so that actually there is a risk of the seat falling over, if not additional Construction elements would act against it.
  • the possibility of a huge Support area on the floor can not be included because the user has such devices will not buy.
  • the falling over can also be prevented by heavy weights that are movable or be immovably attached to the chair, with large e.g. crescent-shaped weights that attach backwards, down to the lower pivot point of the backrest lever or the base there, e.g. between all or part of the foot segments.
  • This is also not very popular since it is the Transportation and manufacturing costs go up and then the chair for the user possibly a monstrous chair figure. If you also reposition the Seat made by the weight, you have a constant restoring force against the force of spring balancers (Fig. 5).
  • the solution can be achieved by one or more additional outrigger feet that extend or fold out to the front.
  • An additional foot is about in the movement Position between the feet / legs of the user.
  • the folding of a boom foot (Fig. 6) (Fig. 5) has the advantage of fewer problems in the operation and life of this To make mechanics; but it doesn't look quite as good when the chair is not used.
  • the Folding downward movement can be vertical or even oblique, which is a little longer Arm under the chair.
  • the boom foot can snap into place or through a Clutch are held down there.
  • the (telescopic) extension is particularly suitable for motorized chairs. There are two options: An existing foot is converted into a telescopic foot. The Cantilever foot always remains in the human foot area.
  • a support telescope is moved diagonally downwards to the floor from there;
  • this outrigger foot is called a supporting telescope, which supports the chair like a 6th leg on the floor approx. 20-35 cm in front of the chair before the chair can be moved from the normal position to the strongly inclined position of the backrest.
  • Extending the support telescope may also be operated and locked with the foot or extended by means of a hand crank. In very expensive versions of the chair, this could also be done electrically or pneumatically, hydraulically, as well as the telescopes for the seat-surface movement.
  • the support telescope When extended, the support telescope (boom foot) is lowered obliquely from above, towards the bottom under the seat at the front; it then lies diagonally between the legs of the user when extended, which is not perceived as optimal. Securing the coupling means that the backrest inclination and seat positions can only be changed when this support telescope exerts pressure on the floor; the rotary movement is then also blocked. However, the fold-out foot, which is only in the foot area at the bottom, seems to be more acceptable to the user.
  • the backrest itself can consist of two parts: The backrest itself can be a further support towards the user, which is parallel to the "backrest parallel" something is movable due to plain bearings or small levers; The actual backrest itself is then held up by weak springs.
  • the construction of the backrest parallel can be used in all the following chairs. The point is to balance the upset movement on the user's body during the tilt.
  • the seat should be easy to move. These properties are achieved through the Storage on 1 or 2 parallel telescopes with double extensions that fit the seat allow for far-reaching horizontal movement while at the rear end of the Seat the backrest (parallel) fixed below with a swivel joint (s) on the seat is. A long spring within these telescopes ensures that the seat is reset Normal attitude. Alternatively, one or more springs in one of the (3) Provide swivel joints for the reset. Even a weight is for this purpose conceivable that pulls on the cables on the seat backwards.
  • backrest lever - is at the top of the Backrest (parallel) is fastened again with a swivel joint and is lowered in about the same length as the backrest to the base part - here is meant upper part above the vertical gas spring - of the chair and there again fixed with a swivel. So the seat runs back and forth with the telescope.
  • This Construction consists of 3 system parts, a horizontal seat on the Telescopes - and a backrest (parallel) - which can only be made up of one or two Rods exist - and one or 2 further vertically rotatable rods or surfaces, the backrest lever, as a support against it; in reality, each for the 3rd Pivots according to the hinge principle, of course, several joints side by side to be available.
  • the movement of the whole structure resembles the movement of the Connecting rod to the engine, only that no complete circular movement is used here, but less than a half.
  • the backrest lever is e.g. also by an adjustable coupling point to the Backrest parallel something to the different demands of people anpienebarroy.
  • the telescopes with double pull-outs should possibly have ball bearings with plastic balls. Possibly. simple plain bearings are sufficient; however, the static friction can then lead to problems.
  • the movement of the seat can also be locked with one hand.
  • the backrest has a smaller lever with one on each side Connected swivel, which in turn connected to a swivel at one vertical extension of the base hangs. But that requires very high chairs.
  • the backrest has a smaller lever on either side or in the middle connected to a swivel, which in turn connected to a swivel a vertical extension of the base hangs.
  • the backrest has a shorter one on either side or in the middle (Double-barreled) telescopic extension that runs diagonally backwards and that on one vertical extension of the base hangs.
  • the inclination of this telescope can possibly be set.
  • the electrically operated chair may be more attractive and comfortable.
  • the different parts can be controlled independently of one another; however, the effort increases and the operational reliability decreases accordingly.
  • the chair has the disadvantage of being dependent on cables or batteries.
  • the seating parameters could be changed extremely slowly and steadily in an adjustable range at the request of the user
  • all of these systems can of course also be equipped with the usual adjustment options for swinging, tilting, backrest adjustments, etc.
  • the basic version does not have armrests, because the patented movable armrests made of DP 197 09 481, which are independent of the chair, are very suitable for working with this movable chair, since their movement is possible up to 1 m, i.e. 35 cm here can be reached without problems.
  • the armrest must be attached to the seat so that the position to the person is about maintained. Using small levers, you can still adapt this to the user's body movement. By default, slightly lower support points are also conceivable at about the location of the armrests (FIG. 7), which make it easier for the user to tilt backwards by supporting them; these can then be upgraded, attached to armrests if desired.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs Characterized By Structure (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Passenger Equipment (AREA)
  • Socks And Pantyhose (AREA)

Abstract

An ergonomic chair having an extending foot and the possibility of swiveling with tilting of the chair backrest synchronized with horizontal movement of the chair seat. It is intended for the linkage system to be installed on a swivel chair. With this (office) chair, it is intended to synchronize the tilt of the backrest with the forward movement of the seat in such a way that the distance of the seat occupant's hands relative to the work equipment on the desk top remains virtually constant at all times.

Description

Die Erfindung betrifft die Kopplung eines Auslegerfußes und der Drehmöglichkeit mit der Neigung der zum horizontalen Vorschieben der Sitzfläche synchronisierten Rückenlehne bei einem Sitzmöbel gemäß dem Oberbegriff des Anspruchs 1.The invention relates to the coupling of a cantilever foot and the possibility of rotation with the Inclination of the backrest synchronized to the horizontal advancement of the seat surface at one Seating furniture according to the preamble of claim 1.

Die Kopplung soll an einem Drehstuhl eingebaut werden. Dieser (Büro-) Stuhl bzw. Sitzmöbel soll das Neigen der Rückenlehne mit dem Vorrücken der Sitzfläche so synchronisieren, daß der Benutzer immer fast genau den gleichen Abstand bezgl. der Hände zu den Arbeitsgeräten auf der Tischfläche hat.The coupling should be installed on a swivel chair. This (office) chair or seating should synchronize the inclination of the backrest with the advancement of the seat so that the Users always have almost the same distance from hands to work tools on the machine Has table surface.

Stand der Technik:State of the art:

Die Ergonomie des längerfristigen Sitzens erfordert eine wechselnde Körperhaltung. Die Gummibälle und Schwingfedersitze geben dem Körper aber keine Ruhemöglichkeiten und müssen immer ausbalanciert werden.The ergonomics of long-term sitting require changing posture. The Rubber balls and swing spring seats give the body no rest and always have to be balanced.

Es gibt Erfindungen für Stühle, die das Neigen der Rückenlehne nach hinten mit dem Vorrücken der Sitzfläche koppeln. Die Bewegung der Sitzfläche erfolgt bei den bekannten Erfindungen in der Regel vor allem mit komplizierten Hebeln, die aber zu wenig horizontale Bewegung des Sitzes erlauben.There are inventions for chairs that tilt the backrest backwards with the advance couple the seat. The movement of the seat takes place in the known inventions in usually with complicated levers, but too little horizontal movement of the Allow seat.

Insbesondere bei Stühlen, die keine Drehstühle sind, ist diese (synchrone) Idee, wenn dort auch aus anderen Gründen erfunden worden, schon lange bekannt, siehe CH 26 97 55. Dort wird der durch ein Drehgelenk verbundene Sitz und die Rückenlehne zusammen mit einer oben anhängenden Stützfläche sogar in eine horizontal liegende Tischfläche verwandelt bzw. entfaltet, wobei sich der Sitz dafür stark nach vorne schiebt und sich auch die Rückenlehne und Stützfläche dabei vollkommen flach herunter senken.This (synchronous) idea is especially for chairs that are not swivel chairs, if there too were invented for other reasons, have been known for a long time, see CH 26 97 55. There the connected by a swivel seat and the backrest together with one above attached support surface even transformed into a horizontal table surface or unfolded, whereby the seat pushes forward strongly and also the backrest and support surface lower it completely flat.

In der Regel aber ist der Grund für die Konstruktion solch synchroner Sitze die dadurch gut erreichbare komfortable Sitzhaltung. Ein Beispiel der Technik (etwas) nach vorne beweglicher Sitze wird in dem Patent EP 0 460 717 A2 für einen Drehstuhl gezeigt, wenn auch dort eigentlich eine Riegelvorrichtung für diese Bewegung als Patent beansprucht wird. Die Neigung der Rückenlehne nach hinten, die wieder mit einem Drehgelenk an dem Sitz befestigt ist, wird über die an Drehgelenken befestigten beweglichen Armlehnen als wesentliche Halterungshebel für die Rückenlehne ermöglicht. Eine unter dem Sitz angebrachte Zugfeder hält dabei das auf die Rückenlehne wirkende Gewicht der Person im Gleichgewicht. Die Sitzfläche wird dabei auch in seiner Neigung etwas verändert.As a rule, however, the reason for the construction of such synchronous seats is good achievable comfortable sitting posture. An example of technology (slightly) more forward moving Seats are shown in the patent EP 0 460 717 A2 for a swivel chair, although there actually a locking device for this movement is claimed as a patent. The inclination of the Backrest, which is again attached to the seat with a swivel, is over the movable armrests attached to swivel joints as essential mounting levers for the Backrest allows. A tension spring attached under the seat keeps this on the Backrest acting weight of the person in balance. The seat is also in slightly changed his inclination.

Ein ähnliches weiteres Beispiel der Technik beweglicher Sitze wird in dem Patent DE 33 15 237 A1 gezeigt. Hier wird aber die Rückenlehne nicht über die Armlehne sondern direkt von Halterungen der Basis also des Untergestells gehalten wie auch der Sitz, der allerdings längsverschieblich nach vorne gleitet, wenn sich die Rückenlehne neigt.A similar further example of the technology of movable seats is in the patent DE 33 15 237 A1 shown. But here the backrest is not over the armrest but directly from Brackets held the base of the base as well as the seat, however slides longitudinally forward when the backrest tilts.

Mängel der bekannten Technik:Defects of the known technology:

Allerdings ist die horizontale Bewegung der Sitzfläche in diesen Stühlen bewußt nur so gering gewählt, da sonst diese Stühle im nach vorne ausgefahrenen Zustand der Sitzfläche mit dem Benutzer nach vorne umkippen könnten. So haben die Erfinder auf eine durchgreifende Konstruktion mit dem wirklichen Erreichen des oben genannten Zieles wohl noch verzichtet. Oder man müßte eine riesige Unterstützungsfläche am Boden für die Füße des Stuhles reservieren, was man natürlich nicht vorgenommen hat. Ebensowenig verankert man Bürostühle nicht am Boden. Eine magnetische einschaltbare Haftung wäre noch das Beste dafür.However, the horizontal movement of the seat in these chairs is deliberately only so slight chosen, otherwise these chairs in the extended state of the seat with the Users could tip over. So the inventors have a sweeping Construction with the actual achievement of the above-mentioned goal is probably still dispensed with. Or you would have a huge support area on the floor for the feet of the chair reserve, which of course has not been done. Nor are you anchoring office chairs not on the ground. A magnetic switchable liability would still be the best thing for it.

So wird aber der eigentliche Zweck nicht erreicht, da die horizontale Bewegung für den Ausgleich etwa 30 bis 35 cm betragen muß bei einem Neigungsunterschied der Rückenlehne von ca. 30 bis 40 Grad.But the actual purpose is not achieved because the horizontal movement for the Compensation must be about 30 to 35 cm with a backrest inclination difference of approx. 30 to 40 degrees.

Die Sitzgummibälle etc. sind nur Behelfe, da diese das Abstandsproblem nicht lösen und bei dem ewigen Balancieren das Herunterfallen begünstigen. Sie geben aber der Wirbelsäule bei zwar verschiedenen Sitzpositionen keine Rückenlehne.The rubber seat balls etc. are only aids, since they do not solve the distance problem and that eternal balancing favor the falling. But you give the spine different seating positions no backrest.

Technische Aufgabe:Technical task:

Ohne störende Geräusche und Anstrengungen soll die horizontale Bewegung des Sitzes funktionieren. Aber die Vorteile und Abmessungen eines normalen Dreh-Bürostuhles sollen möglichst erhalten bleiben, wenigstens in der normalen Sitzposition.The horizontal movement of the seat should be without disturbing noises and efforts function. But the advantages and dimensions of a normal swivel office chair are said to be remain as possible, at least in the normal sitting position.

Lösung:Solution:

Die o.a. Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.The above Object is solved by the characterizing features of claim 1.

Die abhängigen Ansprüche definieren bevorzugte oder vorteilhafte Ausführungsbeispiele des Sitzmöbels.The dependent claims define preferred or advantageous embodiments of the Seating furniture.

Es können verschiedene Ansätze für die Lösung dieser Aufgabe gemacht werden. Das Untergestell des (Büro-) Drehstuhles besteht in der Regel aus 5 Füßen mit der bekannten Gas-Feder-Mechanik zur senkrechten Höhenverstellung. Der bekannte Ansatz für die technische Aufgabe bezgl. der Sitzfläche und Rückenlehne geht von Hebelmechaniken aus, die gekoppelt sind mit einer (zu) geringen Gleitbewegung, so daß auf jeden Fall der Schwerpunkt nicht zu weit nach vorne gerät.Various approaches can be taken to solve this task. The The base of the (office) swivel chair usually consists of 5 feet with the well-known gas spring mechanism for vertical height adjustment. The well-known approach to technical The task regarding the seat and backrest is based on lever mechanisms that are coupled are with (too) little sliding movement, so that the center of gravity is definitely not too far gets to the front.

In dem neuen Design-Ansatz wird vor allem auf die hinreichende Gleitbewegung gesetzt, die durch evtl. kleine Hebelbewegungen für eine gewünschte Neigung der Sitzfläche unterstützt werden könnten. Dabei wird der Schwerpunkt wesentlich nach vorne verlagert, so daß eigentlich die Gefahr des Umstürzens des Sitzes nach vorne besteht, wenn nicht zusätzliche Konstruktionselemente dagegen wirken würden. Die Möglichkeit einer riesigen Unterstützungsfläche auf dem Boden kann man nicht einbeziehen, da der Benutzer solche Geräte nicht kaufen wird.In the new design approach, the main focus is on the sufficient sliding movement supported by small lever movements for a desired inclination of the seat could become. The focus is shifted significantly forward, so that actually there is a risk of the seat falling over, if not additional Construction elements would act against it. The possibility of a huge Support area on the floor can not be included because the user has such devices will not buy.

Das Umfallen kann man auch verhindern durch schwere Gewichte, die beweglich oder unbeweglich am Stuhl angebracht werden, mit großen z.B. halbmondförmigen Gewichten, die nach hinten, unten an dem unteren Drehpunkt des Lehnenhebels oder der Basis dort anhängen, z.B. zwischen allen oder einem Teil der Fußsegmente. Das ist auch nicht sehr beliebt, da es die Kosten für den Transport und die Herstellung hochtreibt und der Stuhl dann für den Benutzer evtl. ein monströses Stuhlungetüm ist. Wenn man dazu auch die Rückpositionierung der Sitzfläche durch das Gewicht bewerkstelligt, hat man eine gleichbleibende Rückstellkraft entgegen der Kraft bei Federzügen (Fig. 5).The falling over can also be prevented by heavy weights that are movable or be immovably attached to the chair, with large e.g. crescent-shaped weights that attach backwards, down to the lower pivot point of the backrest lever or the base there, e.g. between all or part of the foot segments. This is also not very popular since it is the Transportation and manufacturing costs go up and then the chair for the user possibly a monstrous chair figure. If you also reposition the Seat made by the weight, you have a constant restoring force against the force of spring balancers (Fig. 5).

Die Lösung ist sinngemäß durch einen oder mehrere zusätzliche Auslegerfüße zu erreichen, die nach vorne ausfahren oder ausklappen. Ein zusätzlicher Fuß wird vor der Bewegung etwa in die Position zwischen die Füße/Beine des Benutzers gebracht. Das Klappen eines Auslegerfußes (Fig. 6) (Fig. 5) hat den Vorteil, geringere Probleme bei der Bedienung und Lebensdauer dieser Mechanik zu machen; es sieht aber beim unbenutzten Stuhl nicht ganz so gut aus. Die Klappbewegung nach unten kann senkrecht oder sogar schräg erfolgen, was einen etwas längeren Ausleger unter dem Stuhl möglich macht. An dem Auslegerklappfuß ist seitlich eine Trittfläche angebracht, die eine Fußbedienung zum Ausfahren möglich macht, ebenso ein Hebel zum Lösen dieses ausgeklappten Auslegerfußes. Der Auslegerfuß kann dort einrasten oder durch eine Kupplung dort niedergehalten werden.The solution can be achieved by one or more additional outrigger feet that extend or fold out to the front. An additional foot is about in the movement Position between the feet / legs of the user. The folding of a boom foot (Fig. 6) (Fig. 5) has the advantage of fewer problems in the operation and life of this To make mechanics; but it doesn't look quite as good when the chair is not used. The Folding downward movement can be vertical or even oblique, which is a little longer Arm under the chair. There is a step on the side of the boom folding foot attached, which allows a foot control to extend, as well as a lever to release this extended boom foot. The boom foot can snap into place or through a Clutch are held down there.

Das (teleskopische) Ausfahren bietet sich vor allem an bei motorischen ausgestatteten Stühlen. Dabei gibt es 2 Möglichkeiten: Ein vorhandener Fuß wird zu einem Teleskopfuß umgestaltet. Der Auslegerfuß bleibt dabei immer im Fußbereich des Menschen.The (telescopic) extension is particularly suitable for motorized chairs. There are two options: An existing foot is converted into a telescopic foot. The Cantilever foot always remains in the human foot area.

Oder direkt unter dem Sitz wird von dort oben aus ein Stützteleskop schräg nach vorne unten auf den Boden gefahren; im Folgenden wird dieser Auslegerfuß Stützteleskop genannt, der ca. 20-35 cm vor dem Stuhl auf den Fußboden den Stuhl wie ein 6. Bein abstützt, bevor der Stuhl aus der Normalstellung in die stark geneigte Stellung der Rückenlehne bewegt werden kann. Das Ausfahren des Stützteleskops wird evtl. auch mit dem Fuß bedient und arretiert oder durch Handkurbel ausgefahren. In ganz teuren Versionen des Stuhles könnte man dies auch elektrisch oder pneumatisch, hydraulisch machen, ebenso wie die Teleskope für die Sitz-Flächen-Bewegung. Das Stütz-Teleskop (Ausleger-Fuß) ist im ausgefahrenen Zustand schräg von oben, vorne unter der Sitzfläche nach unten gerichtet auf den Boden abgesenkt; es liegt dann also im ausgefahrenen Zustand schräg zwischen den Beinen des Benutzers, was nicht als optimal empfunden wird. Eine Sicherung bezgl. Kopplung bewirkt, daß die Rücklehnen-Neigung und Sitzflächen-Positionen nur dann verändert werden kann, wenn dieses Stütz-Teleskop Druck auf den Boden ausübt; auch die Drehbewegung ist dann blockiert.
Es scheint aber der Ausklapp-Fuß, der nur unten im Fußbereich liegt, für den Benutzer eherakzeptierbarzu sein.Or, directly under the seat, a support telescope is moved diagonally downwards to the floor from there; In the following, this outrigger foot is called a supporting telescope, which supports the chair like a 6th leg on the floor approx. 20-35 cm in front of the chair before the chair can be moved from the normal position to the strongly inclined position of the backrest. Extending the support telescope may also be operated and locked with the foot or extended by means of a hand crank. In very expensive versions of the chair, this could also be done electrically or pneumatically, hydraulically, as well as the telescopes for the seat-surface movement. When extended, the support telescope (boom foot) is lowered obliquely from above, towards the bottom under the seat at the front; it then lies diagonally between the legs of the user when extended, which is not perceived as optimal. Securing the coupling means that the backrest inclination and seat positions can only be changed when this support telescope exerts pressure on the floor; the rotary movement is then also blocked.
However, the fold-out foot, which is only in the foot area at the bottom, seems to be more acceptable to the user.

Nun kann man aber bei dieser Umfall-Problematik für verschiebbare Sitzflächen 3 Sachlagen unterscheiden, wobei Fall C als die günstigste Lösung erscheint:

  • A: Die Rückenlehne (und damit auch der Sitz) ist in jeder Neigungs-Stellung fixierbar. Das erfordert die größte Unterstützungsfläche am Boden. Denn der Benutzer kann auch auf dem veränderten Sitz seinen Körper und damit den Schwerpunkt nach vorne neigen. Der Ausleger-Fuß muß etwa 35 cm nach vorne aufsetzen. Bei nicht motorisch betriebenen Stühlen ist der Ausleger-Klapp-Fuß eine einfache Möglichkeit.
    Die nächsten Lösungen B und C erfordern eine kleinere Unterstützungsfläche, also nur kürzere Ausleger-Füße. Der Ausleger-Fuß muß dann nur etwa 20 cm nach vorne aufsetzen.
  • B: Die Rückenlehne ist nicht fixierbar und mit einer Rückstellkraft, die nach vorne drückt, gefedert. Diese Lösung hat den Nachteil, daß die Federkraft genau ( für jedes noch so großes Benutzergewicht) genau geregelt sein muß. Der Benutzer muß andauernd mit der potentiellen Bewegung kämpfen und hat keine eigentliche Rückenlehne sondern nur eine federnde Unterstützung.
  • C: Die Rückenlehne ist bezgl. der Bewegung nach vorne nicht fixierbar - daß heißt die Lehne kommt mit nach vorne, sobald sich der Benutzer nach vorne beugt - und zwar mit einer so geringen Rückstellkraft gefedert, die gerade nur den Sitz mit dem Benutzer wieder zurückbewegen kann, und die Rückenlehne ist nur gegen das Zurücklehnen mit einen zusätzlichen Hebel fixierbar. Damit kann sich der Benutzer entspannt zurücklehnen, aber das Risiko nach vorne mit dem gesamten Stuhl umzukippen, ist geringer, da der Stuhl sofort den Sitz nach hinten fährt, wenn der Benutzer sich nach vorne beugt und den Schwerpunkt verlegt. Sobald also der Benutzer die Lehne nach hinten stellen will, muß er einen Hebel etc. bedienen, um die Arretierung zu lockern. Ein Freilauf mit einer handbedienten Kupplung kann z.B. dazu führen, diese einseitige Frei-Bewegung zu ermöglichen. Eine Zahn-Ratschenkupplung tut es auch, ist aber nicht stufen- und geräuschlos. Dieser Hebel könnte auch als Fußschaltung gesteuert sein. ebenso kann man diesen in die Rückenlehne integrieren und mit dem Kopf oder einem speziellen Rückendruck oder Armdruck bedienen.
    Ein weitere Betrachtung ist erforderlich für die Kopplung zwischen dem Auslegerfuß am Unter-Gestell, der Drehbewegung des Stuhles und der Neige-Möglichkeit der Rückenlehne; denn sonst müßte man in alle Richtungen einen Ausleger-Fuß haben, so aber nur nach vorne. Wenn unten der (zusätzliche) Ausleger-Fuß vorne ausgeklappt worden ist, dann ist die Drehbewegung des Stuhles blockiert und erst dann wird das starke horizontale Verschieben der Sitzfläche und das starke Neigen der Rückenlehne freigegeben und ermöglicht.
    Die Kopplung kann leicht durch zwei Seilzüge mit Sperrbolzen bei der Drehung und Verschiebung erreicht werden. Oder einen Seilzug vom Ausleger-Fuß bis unter den Sitz und dort eine evtl. knickbare Hebel-Mechanik für den weiteren Zweck, denn dabei muß die Höhenverstellbarkeit des Unter-Gestells berücksichtigt werden. Bei motorischen ausgestatteten Stühlen kann das durch eine simple Steuerungs-Logik bewirkt werden. Allerdings kann der Ausleger-Fuß mit einer Verlängerung nach unten auch drehbar am Obergestell / Sitz befestigt sein; dann muß das Untergestell nicht vor dem Ausklappen positioniert werden. Das ist wegen der Höhenverstellbarkeit aber komplizierter zu konstruieren. (Fig. 11) Der Seilzug kann auch durch eine Hebelmechanik, evtl. mit Kardangelenken ersetzt werden; nur muß eben die Höhenverstellbarkeit des Gerätes gegeben bleiben.
    • Now you can differentiate between three situations in this fall-over problem for sliding seats, whereby case C appears to be the cheapest solution:
  • A: The backrest (and thus the seat) can be fixed in any tilt position. This requires the largest support area on the ground. Because the user can also tilt his body and thus the center of gravity forward on the changed seat. The outrigger foot must touch about 35 cm forward. The extension arm is a simple option for non-motorized chairs.
    The next solutions B and C require a smaller support area, i.e. only shorter outrigger feet. The outrigger foot then only has to touch about 20 cm forward.
  • B: The backrest cannot be fixed and is sprung with a restoring force that pushes forward. The disadvantage of this solution is that the spring force must be precisely regulated (for every user weight, however large). The user has to constantly struggle with the potential movement and has no actual backrest but only a resilient support.
  • C: The backrest cannot be fixed with respect to the forward movement - that is, the backrest comes forward as soon as the user bends forward - with such a low restoring force that just move the seat back with the user can, and the backrest can only be fixed against leaning back with an additional lever. This allows the user to sit back and relax, but the risk of tipping forward with the entire chair is reduced since the chair immediately moves the seat backwards when the user leans forward and changes the center of gravity. As soon as the user wants to put the backrest back, he has to operate a lever etc. to loosen the lock. A freewheel with a hand-operated clutch can, for example, make this one-sided free movement possible. A tooth ratchet clutch also does it, but it is not stepless and noiseless. This lever could also be controlled as a foot switch. it can also be integrated into the backrest and operated with the head or a special back pressure or arm pressure.
    Further consideration is required for the coupling between the cantilever foot on the lower frame, the rotating movement of the chair and the possibility of tilting the backrest; otherwise you would have to have an outrigger foot in all directions, but only forward. If the (additional) outrigger foot has been folded out at the bottom, the rotation of the chair is blocked and only then is the strong horizontal displacement of the seat and the strong inclination of the backrest released and enabled.
    The coupling can be easily achieved by two cables with locking bolts during rotation and displacement. Or a cable pull from the outrigger foot to under the seat and there a possibly foldable lever mechanism for the other purpose, because the height adjustment of the lower frame must be taken into account. In the case of motorized chairs, this can be done by a simple control logic. However, the extension foot can also be rotatably attached to the top frame / seat with an extension downwards; then the underframe does not have to be positioned before unfolding. However, this is more complicated to construct because of the height adjustability. (Fig. 11) The cable can also be replaced by a lever mechanism, possibly with universal joints; only the height adjustability of the device must remain.

    • Die Rückenlehne selber kann aber aus 2 Teilen bestehen: Die Rückenlehne selber kann nach der Seite zum Benutzer hin noch eine weitere Auflage sein, die parallel zur "Rückenlehnenparallele"
    durch Gleitlager oder kleine Hebel etwas beweglich ist; selber wird dann die eigentliche Rückenlehne durch schwach Federn nach oben gehalten. Die Konstruktion der Rückenlehnen-Parallele kann man in allen folgenden Stühlen anwenden. Der Sinn ist während der Neigung der Ausgleich der Stauch-Bewegung am Körperdes Benutzers.    However, the backrest itself can consist of two parts: The backrest itself can be a further support towards the user, which is parallel to the "backrest parallel"
    something is movable due to plain bearings or small levers; The actual backrest itself is then held up by weak springs. The construction of the backrest parallel can be used in all the following chairs. The point is to balance the upset movement on the user's body during the tilt.

    Der Sitz sollte leicht beweglich sein. Diese Eigenschaften erreicht man durch die Lagerung auf 1 oder 2 parallelen Teleskopen mit Doppelauszügen, die der Sitzfläche eine weit vorgreifende horizontale Bewegung zulassen, während am hinteren Ende der Sitzfläche die Rückenlehne(nparallele) unten mit einem Drehgelenk(en) am Sitz befestigt ist. Innerhalb dieser Teleskope sorgt eine lange Feder für ein Zurückstellen des Sitzes in Normalhaltung. Alternativ kann auch eine oder mehrere Federn in einem der (3) Drehgelenke für die Rückstellung sorgen. Selbst ein Gewicht ist für diesen Zweck denkbar, das an Seilzügen am Sitz nach hinten zieht.The seat should be easy to move. These properties are achieved through the Storage on 1 or 2 parallel telescopes with double extensions that fit the seat allow for far-reaching horizontal movement while at the rear end of the Seat the backrest (parallel) fixed below with a swivel joint (s) on the seat is. A long spring within these telescopes ensures that the seat is reset Normal attitude. Alternatively, one or more springs in one of the (3) Provide swivel joints for the reset. Even a weight is for this purpose conceivable that pulls on the cables on the seat backwards.

    Nun kann man dabei 4 verschieden Mechaniken der Verbindung von Sitz und Rückenlehne(nparallele) und optionalem Lehnen-Hebel mit dem Unter-Gestell unterscheiden. Allen gemeinsam ist, daß der Sitz hinten mit der Rückenlehne(nparallele) (Fig. 10) unten durch ein Drehgelenk verbunden ist, wodurch eben ein verstellbarer Sitz gegeben ist. Natürlich kann man auch dieses Drehgelenk zusätzlich mit einer Kupplung ausbilden, um dem Stuhl die Alternative eines vollkommen normalen Stuhles zu geben; das heißt, die Lehne neigt sich, aber der Sitz fährt nicht nach vorne. Verschieden bei a) bis d) ist die Führung des oberen Punktes der Rückenlehne(nparallele). Trivialerweise kann man die Längen, Neigungen der nachfolgend beschriebenen Hebel / Teleskope einstellbar machen, um dem Benutzer verschiedene Einstellungen zu ermöglichen. Now you can do 4 different mechanics of connecting the seat and Backrest (parallel) and optional backrest lever with the lower frame differ. Common to all is that the back seat with the backrest (parallel) (Fig. 10) is connected below by a swivel, which just makes an adjustable seat given is. Of course you can also use this coupling with a coupling train to give the chair the alternative of a perfectly normal chair; that is, the backrest tilts, but the seat does not move forward. Different from a) to d) is the guidance of the upper point of the backrest (parallel). trivially you can see the lengths, inclinations of the levers / telescopes described below make adjustable to allow the user different settings.

    a) (Fig. 1), (Fig. 9)a) (Fig. 1), (Fig. 9)

    Eine weitere Hebelmechanik - im Folgenden Lehnen-Hebel genannt - ist oben an der Rückenlehne(nparallele) wieder mit einem Drehgelenk befestigt und wird nach unten in der etwa gleichen Länge wie die Rückenlehne an das Basisteil - gemeint ist hier der oberen Teil über der senkrechten Gasfeder - des Stuhles geführt und dort daran wieder mit einem Drehgelenkfixiert. Die Sitzfläche läuft also mit dem Teleskop hin und her. Diese Konstruktion besteht also aus 3 System-Teilen, einer horizontalen Sitzfläche auf den Teleskopen - und einer Rückenlehne(nparallele) - die kann auch nur aus einer oder 2 Stangen bestehen - und einer oder 2 weiteren vertikal drehbaren Stangen oder Flächen, der Lehnenhebel, als Abstützung dagegen; in der Realität können jeweils für die 3 Drehpunkte nach dem Schanierprinzip natürlich mehrere Gelenke nebeneinander vorhanden sein. Die Bewegung des ganzen Gebildes ähnelt der Bewegung der Pleuelstange beim Motor, nur daß hier keine vollständige Kreisbewegung benutzt wird, sondern nur weniger als eine halbe.Another lever mechanism - hereinafter referred to as backrest lever - is at the top of the Backrest (parallel) is fastened again with a swivel joint and is lowered in about the same length as the backrest to the base part - here is meant upper part above the vertical gas spring - of the chair and there again fixed with a swivel. So the seat runs back and forth with the telescope. This Construction consists of 3 system parts, a horizontal seat on the Telescopes - and a backrest (parallel) - which can only be made up of one or two Rods exist - and one or 2 further vertically rotatable rods or surfaces, the backrest lever, as a support against it; in reality, each for the 3rd Pivots according to the hinge principle, of course, several joints side by side to be available. The movement of the whole structure resembles the movement of the Connecting rod to the engine, only that no complete circular movement is used here, but less than a half.

    Der Lehnenhebel wird z.B. auch durch einen verstellbaren Ankopplungspunkt an die Rückenlehnen-Parallele etwas an die verschiedenen Ansprüche der Menschen anpaßbargemacht.The backrest lever is e.g. also by an adjustable coupling point to the Backrest parallel something to the different demands of people anpaßbargemacht.

    Die Mechanik im hinteren Teil des Stuhl wird aus Sicherheitsgründen mit einem Balg gegen Verletzungsgefahren verborgen. Außerdem sieht der Stuhl damit homogener aus. Daher ist es auch besser, nur eine Stange für den Lehnen-Hebel zu verwenden.For safety reasons, the mechanics in the back of the chair are equipped with a bellows hidden against the risk of injury. The chair also looks more homogeneous. It is therefore better to use only one rod for the backrest lever.

    Die Teleskope mit Doppelauszügen sollten aus Geräuschgründen evtl. mit Plastikkugeln kugelgelagert sein. Evtl. reichen auch einfache Gleitlager; allerdings kann dann die Haft-Reibung zu Problemen führen.
    Die Bewegung des Sitzes ist auch mit einer Hand arretierbar.    For reasons of noise, the telescopes with double pull-outs should possibly have ball bearings with plastic balls. Possibly. simple plain bearings are sufficient; however, the static friction can then lead to problems.
    The movement of the seat can also be locked with one hand.

    b) (Fig. 2), (Fig. 8)b) (Fig. 2), (Fig. 8)

    Die Rückenlehne hat nach oben hin an jeder Seite einen kleineren Hebel mit einem Drehgelenk verbunden, der seinerseits mit einem Drehgelenk verbunden an einer senkrechten Verlängerung des Untergestells hängt. Das erfordert aber sehr hohe Stühle.The backrest has a smaller lever with one on each side Connected swivel, which in turn connected to a swivel at one vertical extension of the base hangs. But that requires very high chairs.

    c) (Fig. 3)c) (Fig. 3)

    Die Rückenlehne hat nach unten hin anjeder Seite oder in der Mitte einen kleineren Hebel mit einem Drehgelenk verbunden, der seinerseits mit einem Drehgelenk verbunden an einer senkrechten Verlängerung des Untergestells hängt.The backrest has a smaller lever on either side or in the middle connected to a swivel, which in turn connected to a swivel a vertical extension of the base hangs.

    d) (Fig. 4)d) (Fig. 4)

    Die Rückenlehne hat nach oben hin an jeder Seite oder in der Mitte einen kürzeren (doppelläufigen) Teleskopauszug, der schräg nach hinten oben läuft und der an einer senkrechten Verlängerung des Untergestells hängt. Die Neigung dieses Teleskops kann evtl. eingestellt werden. The backrest has a shorter one on either side or in the middle (Double-barreled) telescopic extension that runs diagonally backwards and that on one vertical extension of the base hangs. The inclination of this telescope can possibly be set.

    Vorteile:Benefits:

    Der Mensch kann seinen Körper ergonomisch in wechselnd steiler oder geneigter Stellung der Rückenlehne auf dem Stuhl halten, damit Rückenleiden nicht so schnell auftreten können. Der Stuhl bietet aber trotzdem entlastende Ruhelagen für den Benutzer. Die Position der ausgestreckten Hand zum Tisch hin ist wenig verändert, während der Sitz auf dem Stuhl hin und herfährt, wenn sich die Neigung der Rückenlehne ändert.Man can ergonomically change his body in steeper or inclined Keep the backrest on the chair so that back ailments do not happen so quickly may occur. However, the chair offers restful resting positions for the User. The position of the outstretched hand towards the table has not changed much, while the seat on the chair moves back and forth when the backrest inclines changes.

    Weiterbildungen der Erfindungen:Further developments of the inventions:

    Der elektrische betriebene Stuhl ist evtl. optisch schöner und komfortabler. Je nach Motorenanzahl kann man die verschieden Teile unabhängig voneinander steuern; allerdings steigt der Aufwand an und die Betriebs-Zuverlässigkeit nimmt entsprechend ab. Und der Stuhl hat den Nachteil der Abhängigkeit von Kabel oder Akku. Aber die Sitz-Parameter könnten auf Wunsch des Benutzers in einem einstellbaren Bereich extrem langsam und stetig verändert werden
    Außerdem können natürlich alle diese Systeme mit den üblichen Verstellmöglichkeiten für Schwingen, Neigen, Rückenlehnenverstellungen etc. zusätzlich ausgerüstet werden. Bei der Grundversion wird auf Armlehnen verzichten, da sich die patentierten beweglichen, vom Stuhl unabhängigen Armlehnen aus DP 197 09 481 sehr gut eignen, mit diesem beweglichen Stuhl zusammen zu arbeiten, da deren Bewegung bis zu 1 m möglich ist, die 35 cm hier also ohne Probleme zu erreichen sind.
    Ansonst muß die Armlehne am Sitz befestigt werden, damit die Position zum Mensch etwa erhalten bleibt. Durch kleine Hebel kann man das noch an die Körperbewegung des Benutzers anpassen.
    Standardmäßig sind auch evtl. an etwa der Stelle der Armlehnen (Fig. 7) etwas tiefer Abstützungspunkte denkbar, die dem Benutzer das nach hinten Neigen durch dagegen Abstützen leichter ermöglichen; diese können dann aufgerüstet, aufgesteckt werden zu Armlehnen, wenn es gewünscht wird.    The electrically operated chair may be more attractive and comfortable. Depending on the number of engines, the different parts can be controlled independently of one another; however, the effort increases and the operational reliability decreases accordingly. And the chair has the disadvantage of being dependent on cables or batteries. But the seating parameters could be changed extremely slowly and steadily in an adjustable range at the request of the user
    In addition, all of these systems can of course also be equipped with the usual adjustment options for swinging, tilting, backrest adjustments, etc. The basic version does not have armrests, because the patented movable armrests made of DP 197 09 481, which are independent of the chair, are very suitable for working with this movable chair, since their movement is possible up to 1 m, i.e. 35 cm here can be reached without problems.
    Otherwise, the armrest must be attached to the seat so that the position to the person is about maintained. Using small levers, you can still adapt this to the user's body movement.
    By default, slightly lower support points are also conceivable at about the location of the armrests (FIG. 7), which make it easier for the user to tilt backwards by supporting them; these can then be upgraded, attached to armrests if desired.

    Claims (14)

    1. A chair whose seat is movable horizontally forward and back and whose seat-movement is synchronized with the tilting of the backrest; the seat can be freely moved back as the backrest freely moves upright, the movement being activatable by a spring or other pressure or force, or selectable at will by the user,
      characterized in that
      forward movement of the seat and the associated increased rake of the backrest are automatically lockable, and release of this tilting action to allow increased rake by synchronized coupling to be selected by the user is enabled only if an outrigger foot or telescoping foot has been extended in the direction of seat-movement, and rotation of the chair has also been locked in this position, the rotational lock being obtainable by the lowering to the floor of the outrigger foot or telescoping foot.
    2. A chair according to Claim 1,
      characterized in that
      the chair is both rotationally and vertically movable.
    3. A chair according to Claim 1 or Claim 2,
      characterized in that
      the seat slides.
    4. A chair according to Claim 3,
      characterized in that
      the seat runs on telescopic rails or telescopic double extenders.
    5. A chair according to any one of Claims 1 to 4,
      characterized in that
      the backrest is made displaceable towards a "backrest-parallel".
    6. A chair according to Claim 5,
      characterized in that
      the movement of the backrest towards the backrest-parallel can be effected by sliding or by small pivot arms between the two, and the backrest is pulled upwards by springs.
    7. A chair according to any one of Claims 1 to 6,
      characterized in that
      the movement of the seat and the backrest is connected to a mechanism in which a further lever mechanism, the back lever-arm is pivotally connected to the backrest or backrest-parallel at the top and leads down, with approximately the same length as the backrest, to the base part - that is to say the upper part above the vertical pneumatic spring - of the chair where it is fixed thereto again with a pivotal connection, are connected to the pedestal or are thus coupled by controls.
    8. A chair according to any one of Claims 1 to 6,
      characterized in that
      the movement of the seat and the backrest is connected to a mechanism in which the backrest or the backrest-parallel has, pivotally connected on each side or in the middle, an upwards-reaching smaller lever-arm which, in turn, is pivotally connected to a vertical extension of the pedestal, are connected to the pedestal or are thus coupled by controls.
    9. A chair according to any one of Claims 1 to 6,
      characterized in that
      the movement of the seat and the backrest is connected to a mechanism in which the backrest or the backrest-parallel has, pivotally connected on each side or in the middle, a downwards-reaching smaller lever-arm which, in turn, is pivotally connected to a vertical extension of the pedestal, are connected to the pedestal or are thus coupled by controls.
    10. A chair according to any one of Claims 1 to 6,
      characterized in that
      the movement of the seat and the backrest is connected to a mechanism in which the backrest or the backrest-parallel has, on each side or in the middle, an upwards-reaching smaller (double-acting) telescopic extender which extends rearwards and upwards at an oblique angle and is connected to a vertical extension of the pedestal, are connected to the pedestal or are thus coupled by controls.
    11. A chair according to any one of Claims 7 to 10,
      characterized in that
      the controls are motorized controls.
    12. A chair according to any one of Claims 1 to 11,
      characterized in that
      the logical coupling of the rotational movement, the outrigger foot and the horizontal movement of the seat is realized by cable controls and/or lever mechanisms or a combination thereof or electrically or pneumatically or hydraulically in conjunction with locking pins or snap-in couplings.
    13. A chair according to any one of Claims 1 to 12 characterized in that return of the seat is effected by long springs / elastic elements inside or parallel with the telescopic components, or by springs in the pivot joints.
    14. A chair according to any one of Claims 1 to 13,
      characterized in that
      return of the seat is effected by weights behind the seat.
    EP01956266A 2000-06-17 2001-06-11 Ergonomic office chair with an extending foot Expired - Lifetime EP1301107B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE10030022 2000-06-17
    DE10030022A DE10030022C2 (en) 2000-06-17 2000-06-17 Ergonomic office chair with outrigger foot
    PCT/DE2001/002203 WO2001097657A1 (en) 2000-06-17 2001-06-11 Ergonomic office chair with an extending foot

    Publications (2)

    Publication Number Publication Date
    EP1301107A1 EP1301107A1 (en) 2003-04-16
    EP1301107B1 true EP1301107B1 (en) 2004-11-17

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    US (1) US6824219B2 (en)
    EP (1) EP1301107B1 (en)
    CN (1) CN1241509C (en)
    AT (1) ATE282346T1 (en)
    AU (1) AU778044C (en)
    CA (1) CA2412875C (en)
    DE (3) DE10030022C2 (en)
    ES (1) ES2227245T3 (en)
    HK (1) HK1058138A1 (en)
    WO (1) WO2001097657A1 (en)

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    DE4121768C1 (en) * 1991-07-02 1992-10-08 Grammer Ag, 8450 Amberg, De Car seat backrest cushion - has support plate with adjustable curvature set by stays fastened to baseplate
    US5542746A (en) * 1994-03-17 1996-08-06 Bujaryn; L. Walter Variable posture component system seating device
    US5667278A (en) * 1995-12-27 1997-09-16 Li; Chun Hsien Combinational chair, recliner and typing stool
    DE19814067A1 (en) * 1998-03-30 1998-10-08 Klaus Dipl Ing Seeliger Wheelchair with swivel backrest

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    RU2818943C1 (en) * 2023-02-13 2024-05-07 Сергей Викторович Казазаев Multifunctional transformer table
    WO2024172685A1 (en) * 2023-02-13 2024-08-22 Сергей Викторович КАЗАЗАЕВ Multifunctional convertible table

    Also Published As

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    AU778044C (en) 2005-06-09
    HK1058138A1 (en) 2004-05-07
    EP1301107A1 (en) 2003-04-16
    DE10030022A1 (en) 2001-05-31
    AU7835601A (en) 2002-01-02
    DE50104551D1 (en) 2004-12-23
    DE10030022C2 (en) 2002-08-14
    US6824219B2 (en) 2004-11-30
    CA2412875C (en) 2007-02-27
    ATE282346T1 (en) 2004-12-15
    US20030173808A1 (en) 2003-09-18
    CN1444463A (en) 2003-09-24
    WO2001097657A1 (en) 2001-12-27
    ES2227245T3 (en) 2005-04-01
    DE10192482D2 (en) 2003-10-30
    CA2412875A1 (en) 2002-12-17
    AU778044B2 (en) 2004-11-11
    CN1241509C (en) 2006-02-15

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