EP1855570A1

EP1855570A1 - Work stool

Info

Publication number: EP1855570A1
Application number: EP06704725A
Authority: EP
Inventors: Ekkehard Anderle
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-02-25
Filing date: 2006-02-24
Publication date: 2007-11-21
Also published as: WO2006089333A1; AT501982A1; AT501982B1

Abstract

The invention relates to a stool, the seat surface of said stool, which is especially horizontal in the unloaded state, consisting of a central seat region (5) and a peripheral seat region (6).The invention is characterised in that the two seat regions are connected to each other and to the frame (4) of the stool in a mobile manner, in such a way that when the peripheral seat region (6) is tipped by a load about an actual or imaginary tipping axis (7), from the mainly horizontal position, a predominantly vertical upwards movement of the central seat region (5) is caused along the vertical axis (15).

Description

The invention relates to the seat of a chair with or without backrest which at least consists of a central and a peripheral seating area, wherein the central. Seat portion predominantly endang-a vertical axis: can move, while the peripheral part can move about a predominantly horizontal axis, wherein the movements of the two parts are coupled.

Modern ergonomically designed working chairs for office, workshop or laboratory are below others durckaveiweseiitliidie characteristics First, they support and promote a sitting position in which the vertical axis of the torso with the longitudinal axes of the thighs occupies an open angle (greater than 90 degrees) and secondly they rain the seated person noticeably or imperceptibly to the sitting position, albeit minimal, sσdoch change frequently. This stimulates good and positive blood flow to all the muscles and discs of the sitting person. To promote so-called open sitting, there are a number of design solutions relating to the design of the seat of chair chairs in use, all based on the principle that the seat falls partially or entirely towards the front edge, and thus on average about an angle of about 3 to 8 degrees from the horizontal is inclined forward. This is achieved either by the seat being permanently fixed in this forwardly inclined manner, or by manually or automatically tilting the seat surface into it. Direction is adjustable or in which the seat is made of an elastic material which deforms due to the burden of the weight of the seated person in the position described above. The essential design solutions that noticeably or not noticeably stimulate a frequent change in the sitting position are based on the fact that the. seated. Person with the work chair constantly in an unstable balance, constantly forcing the sitting person to perform corrective movements to maintain this unstable balance. Typical solutions for this design variant are the air-filled rubber ball for

Sitting, .Stool with a soft. Base, erormous one. Sandbags or chairs whose. SiIz- are connected via a spring element to the base

In addition to recognized positive characteristics of the various design solutions, there are also a number of design-specific disadvantages. When leaning forward Sitting surfaces, it is unavoidable that a certain slippage of the seated person takes place forward. If the lowering achieved by means of elastic training of Sitzftäche it can be optimally effective only for a durchschittich weighted person. In chairs in which the chair and seated person form an unstable equilibrium unit, a latent high concentration effort of the seated person is necessary, even if this occurs in the subconscious area, and therefore reduces the working capacity of the seated person. Furthermore, it is not possible with most variants difisfis functional principle the. Base of the chair with rollers too. Mistake. Finally, it should be noted that there are virtually no design solutions that obliquely forward tilted sitting and sitting in the unstable balance in a device are optimally combined.

Object of the invention, it is therefore to design a work chair which consists of both a Sitzfläehe which an open seating position promotes without-the seated person from the seat slips sowre as a dynamic adjustment mechanism therefore has the possible change in the angle of the seat, or a part the seat, automatically follows every change in the position of the seated person.

The invention solves this problem by proposing the

Seat area of the work chair in a central, and a peripheral area to share, with the central portion of the horizontally or approximately horizontally formed seat can move by means of an adequate mechanism along a predominantly vertical axis during the unloaded state also horizontal or approximately horizontal peripheral area the seat surface can be tilted about a fictitious horizontal axis, and the motions of the central and peripheral seating areas are coupled together in a specifically determined manner, basically characterized in that the central area of the seat is moved upward by force when the peripheral area of the seat surface is tilted by force from its horizontal or nearly horizontal position. The coupling. of the. Movements, can, mechanical, pneumatic, hydraulic; or via electronically controlled motors and is characterized among other things by the fact that the relation of the acting forces remains the same regardless of their absolute size. The main weight of a Seated Person (especially the weight of the torso) is practiced. SitzknocheiL of the. central. The weight of the thighs and legs is primarily supported by the peripheral region of the working chair, which due to the load on the leading edge up to Since the peripheral seating area and the central seating area are coupled, tilting the peripheral seating area forces the central seating area upward and achieves a positron in which all forces are balanced, without prejudice to the weight of the seat Seated person, the design should be designed so that this point of equilibrium is given when the angle of the longitudinal axis of the thighs of the seated person has a slope of about 5 degrees from the horizontal. The seated person is now in an open position Sitting position and is supported by the still horizontal central seating area slip-proof. At the same time, any change in the position of the seated person (head movement, arm movement, etc.) will result in a positional change in the person's center of gravity which in turn will change the position and magnitude of the forces acting on them and thus the angle of the peripheral seating area. resulting in a change in the height of the central seating area, which in turn stimulates a change in the seating position.

In the drawings, the subject invention is exemplified in Schemaform. Fig.l, 2 and 3, show a configuration variant of ^ Chair in unloaded and in loaded condition, or in the form of a schematic longitudinal section. Fig. 4 shows in schematic form a specific one. Variant of the in Fig. 1 to 3 illustrated chair. FIG. 5 shows a schematic longitudinal section of the variant shown in FIG. 4, and FIG. 6 and FIG. 7 show further variants in the form of schematic longitudinal sections.

According to. 1, the chair consists of a base 1 with rollers 2, height Verstelkaechanismus 3, the central seating area 5, the peripheral seating area 6 and the chassis 4, via which "the seating areas in a movable manner with each other and with connected to the base of the chair. Fig.2 shows the same chair in loaded condition where the force PI predominantly the weight of the torso, head and arms and the forces P2 predominantly the weight of the thighs and. Pure, one seated sipi-represent. If, the forces P2. on the peripheral seating area 6, this can act around an actual or fictitious predominantly auditory axis 7 at an angle from 0 to about 8 degrees from the horizontal position. This tilting movement is deflected via the chassis 4 into an upward movement of the central seat area 5, primarily along the vertical axis 15. The forces P 1 can be applied anywhere along the entire circumference of the peripheral seating area 5, or the real or fictitious tilting axis 7 can, in plan view of the chair, be any angle with respect to a horizontal X, Y, coordinate system Ursprang is about the center of the central seating area is ingest. Fig. J shows a longitudinal section of the Ausfungsvariante de & chair shown in Figure 1 and Figure 2. The bottom of the central seating area 10 made of solid material, such as wood, metal or plastic, is supported in a predominantly vertical guide bushing 14 of the chassis by means of a rigid, predominantly vertical dome 13 fixedly connected thereto Seat pad 12 in the vertical direction can be moved up and down. The also made of solid material such as wood, metal or plastic bottom of the peripheral seating area 9 is located between the disc-like upper end of the chassis 4 and the bottom of the bottom of the central seating area 10 and through the mandrel 13 which through a hole 16 in the center of the Bottom plate 9 is secured against displacement in the horizontal plane. The force P2 presses on the Sftzaufϊage 11 on the front part de soil of the peripheral seat area 9 whereby this is tilted about the fictitious tilting axis 7 at the foremost point of the chassis 4 in the counterclockwise direction with the apparent from the drawing sequence that the bottom of the central Sitting area 10 and the seat cushion 12 are pushed along the central vertical axis 15 of the chair up. According to the embodiment as shown in Fig. 4, the chair consists of a base 1 with rollers 2 and height Versteliungsrnechanismus 3, a central

Sitzbereicn.5 _r a peripheral. Sitting area, 6 of only a limited. Area, at. the central seating area 5 connects and a chassis 4; According to this embodiment variant, the possible tilting axis 7 can only vary in a specific angle I range β with respect to an XY, coordinate system. In a specific embodiment of this variant is the actual or fictitious tilt axis, arranged only at right angles to the selected in Fig. 4 Sctmittebenedes chair. Fig.5 shows in schematic form the. Longitudinal section through, which: shown in Fig. 4: Ausfutirungsvariante wherein the central part of the bottom of the peripheral seating area 9 Pfaππeπartrg is formed and together with the spherical upper end 24 of the chassis 4 forms a ball joint through the center of the horizontal tilt axis 7 of the peripheral Sitting area leads. The longitudinal section shown in Fig. 5 could be slightly modified. Form too-for. the execution variant as. be shown irtigig and Eig.2 applicikabel. 6 shows a longitudinal section of a Ausfithrungsvariante the chair in which the tilting axis 7 is located at right angles to the given Schmttebeπe and the force balance: between Pl and P2 via the FaraHelhebel 16 and 17 and a Rolfe 18 takes place where the parallel lever 16 and 17 via the shafts 19 are movably connected via a connecting piece 2 L rigidly connected to the bottom of the central seating area 10 and to the frame of the chair 20 having a backrest 22 in this exemplary embodiment,

Fig. 7 shows a longitudinal section of a chair based on the same functional principle as shown in Fig. 5 but with an elastic and flexible seat support 23 extending in one piece both over the bottom of the central seating area 10 and over the bottom of the peripheral seating area 9 and at least fixed to the bottom of the central seating area-10

Claims

A chair with a seating surface consisting of a predominantly horizontal, zenfralen sitting area (5) uαdeiaem voraehmlidk horizontal peripheral Sitzbeτeϊch (6), characterized in that the central Sitzbeτeicir (5 ^" ) along a predominantly vertical axis (15) can move up and down during the peripheral seating area can be tilted about a real or fictitious primarily horizontal axis (7), wherein the two seat areas are movably connected to each other and to the chassis of the chair (4) in a predetermined manner characterized in that the tilting of the peripheral Sitzberetehes (6) from its predominantly horizontal starting position leads to a predominantly vertical upward movement of the central seating area (5), or that ekt zurückkippen, the peripheral seating area (6) in its predominantly horizontal starting position a predominantly vertical Abw rtsbewegung causes the central seat portion (5).

2 chair according to claim 1, characterized in that the movable connection of the two seating areas is formed primarily by mechanical means such as levers, cams, axles, linear guide rails and the like.

3 chair according to Anspruchl characterized in that the movable connection of the two seating areas-Wmehmtich is formed by mechanical means in combination with pneumatic and / or hydraulic components.

4 chair according to claim 1, characterized in that when viewed in plan view, the peripheral seating area (6) in the same or different width encloses the central SitzbereicE (5) over the entire circumference of 360 degrees.

Chair according to claim 1, characterized in that, when viewed in plan view; the peripheral seating area (6) is more or less the same different width only over part of the circumference of the central. Sitting area (5) adjoins this.

6 Chair according to Ansspruchl characterized in that the real or fictitious tilting axis (7) of the peripheral Sitzbereiehes (6), when viewed in plan view, at any angle based on a theoretical horizontal X. Y, coordinate system can lie.

7 chair according to claim 1, characterized in that the central seating area (5) and the peripheral seating area (6) each represent a separate component.

8 chair according to claim 1, characterized in that the bottom of the central seating area (10) as well as the bottom of the peripheral Sitzbereiehes (9) with a common seat cover (23) are covered mainly with the central Sitzbereieh (10) is firmly connected.

9 chair according to claim 1, characterized in that the bottom of the central seating area (10) as well as the bottom of the peripheral seating area (9) are covered with a common seat support (23) which is primarily firmly connected to the peripheral seating areas (9).

Chair according to claim 1, characterized in that the real or fictitious tilting axis (7) of the peripheral seating area (6),, lies only in a limited angular range with respect to a theoretical X.Y coordinate system.

11 Chair according to claim 1, characterized in that the real or fictitious tilting axis (7) of the peripheral seating area (6), when viewed in plan view is only at right angles to the longitudinal axis of the chair.