EP1659902B1 - Chaise a pieds elastiques mobiles pour une assise dynamique - Google Patents

Chaise a pieds elastiques mobiles pour une assise dynamique Download PDF

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Publication number
EP1659902B1
EP1659902B1 EP04764056.0A EP04764056A EP1659902B1 EP 1659902 B1 EP1659902 B1 EP 1659902B1 EP 04764056 A EP04764056 A EP 04764056A EP 1659902 B1 EP1659902 B1 EP 1659902B1
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EP
European Patent Office
Prior art keywords
foot
chair
spring
elements
foot elements
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
EP04764056.0A
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German (de)
English (en)
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EP1659902A1 (fr
Inventor
Josef GLÖCKL
Thomas Walser
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Aeris GmbH
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Aeris GmbH
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Publication of EP1659902A1 publication Critical patent/EP1659902A1/fr
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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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/021—Rocking chairs having elastic frames
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/22—Chairs or stools with vertically-adjustable seats with balancing device, e.g. by spring, by weight
    • 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
    • A47C7/002—Chair or stool bases
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
    • 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
    • A47C7/002—Chair or stool bases
    • A47C7/006—Chair or stool bases with castors
    • 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
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/448—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with resilient blocks

Definitions

  • the invention relates to chairs with a foot part with at least three movable, resilient foot elements, which are connected to a leg portion of the chair.
  • Office chairs are often provided with a star-shaped foot part, at the ends of each a roller is provided.
  • the mobility of an office chair is essentially limited to a height adjustment by means of a gas spring and the suspension of the backrest or seat.
  • a chair whose foot consists of star-shaped leaf springs.
  • the leaf springs are essentially S-shaped and have rollers at their lower end. At its upper end, they are suitably fixed to a receiving part which carries a column on which the seat is tiltably held.
  • the star-shaped arms spring outward and create a resilient restoring moment.
  • a chair which has a central pillar with a base on the floor and three feet spaced around this central pillar and designed to be spring-loaded. This design allows the user to perform a pendulum motion.
  • a pendulum stool which is suitable for dynamic sitting, is the European patent application EP 0 808 116 refer to.
  • EP 0 808 116 refers to.
  • the pendulum movement is made possible by a rubber element arranged between the foot part and the leg part.
  • This well-known pendulum stool works well and fulfills the task of actively dynamic sitting.
  • WO 01/91615 A1 From the WO 01/91615 A1 is a chair known, which is equipped with feather-soft chair feet and a weight-centered seat mechanism.
  • a five-star foot is disclosed, which is equipped at its free ends with rollers which are resiliently mounted on a rubber ring.
  • a circular disc made of spring steel is described, which allows a lateral pivoting or tumbling motion.
  • the present invention has for its object to propose a pendulum chair or a chair that allows dynamic sitting and is preferably easy to move.
  • the present invention further has for its object to propose a pendulum chair or a chair in which the cost inherent in the known pendulum stool favorable properties are maintained in a cost effective manner, but which is cheaper and easier to produce.
  • the object of the present invention is to design rolling or sliding chairs with simple means in such a way that significantly more movements of the user are possible without impairing safety and thus avoiding postural injuries that arise when sitting rigidly.
  • the aim is to provide a chair that allows safe and comfortable to sit on a higher level. Above all, it should be avoided that such a chair can suddenly tip over in exposed positions.
  • a chair is provided with a preferred embodiment, which has a plurality of support elements in the region of the foot elements, which are arranged on a resiliently acting foot part of the chair.
  • a lowering movement of the chair results and at least one of the support elements displaces in relation to a standing surface.
  • foot elements of the chair can either be resiliently mounted or they can be designed resiliently from the material and / or structure. It is also possible a combination of a resilient mounting with resiliently executed foot elements.
  • a desired restoring force can be set over partial regions of the 360-degree rotation range of the foot part, so that, for example, unintentionally strong backward oscillation can be reduced by a larger restoring force.
  • a chair according to the invention makes it possible to move up and down while sitting, thanks to the use of a springy-action foot part, which enables dynamic relief of the spine.
  • a chair according to the invention has a supporting effect when getting up and sitting down. As a result, when sitting down, for example, beats on the spine are damped.
  • the up and down is achieved without a special vertically arranged spring element, for example in the form of a coil spring, is required in the foot part of the chair, solely by the resilient mounting, or the elasticity of the foot elements
  • the present invention provides solutions for dynamic sitting on chairs.
  • the present invention is suitable for use in chairs having support elements (rollers, sliders or the like).
  • the invention is, depending on the embodiment, suitable for easy retrofitting existing office chairs.
  • an embodiment with star-shaped foot elements in which the foot elements and / or a sub-element thereof is spring-loaded up and down pivotally, whereby it is possible to specify the respective loaded by the pendulum movement direction by corresponding spring strengths.
  • At least one receiving portion is formed in the lower region of at least one leg part, on which at least one of the foot elements is received, is favorable.
  • This receiving part may conveniently be designed so that a foot element can be suspended thereon, wherein a counterpart of this foot element holds in position.
  • the spring arrangement can favorably consist of a piece of elastomer, against which a region of the foot element or of the partial element rests resiliently.
  • a spring arrangement may be provided which comprises a pull or a compression spring which is arranged on a leg part or on a receiving part and acts between at least one foot element and the leg part or the receiving part.
  • an abutment is arranged on the leg end of the foot element, on which acts at least one spring element of the spring arrangement.
  • a leg-side end of at least one of the foot elements is formed as at least one substantially downwardly open slot. This advantageously achieves that one can simply hang the foot element, and it can be conveniently provided that the foot member is pivotable downwards and at least in the downwardly pivoted position by simple placement can be mounted. It may be beneficial to provide means to prevent uncontrolled translational movement of the chair during a pendulum motion.
  • the foot part comprises foot elements which are suspended so mechanically with respect to the foot part, that they are acted upon by a spring element with a restoring force.
  • This restoring force counteracts a Sp Schwarzschwenkterrorism that results when the load on the chair and tries the radially moving foot elements to a central axis of the chair to draw zoom.
  • the chair has a plurality of foot elements, at the foot end of each serving as a support element role is mounted on an inclined guide axis.
  • a means may be provided in the form of a stopper, which comes into contact with the ground at a predetermined inclination of the leg portion and due to the friction with the ground prevents a translational movement of the pendulum stool.
  • This stopper may be coupled via a hinge connection with the leg part, but it may also be rigidly fixed to the leg part and come in contact with the ground at a predetermined inclination of the leg part.
  • the stopper can also be rigidly arranged at the outer end of the foot and located radially outside this common circumference with respect to a circumference on which all contact surfaces of the foot lie with the ground.
  • feather soft, elastic foot elements the speech
  • the elasticity of the foot elements can be achieved by suitable choice of material, the combination of different materials and / or by the shaping.
  • support elements are elements which can be fastened to a foot part of a chair and which can simply be moved or moved along a standing surface.
  • support elements are sliding feet, or other sliding elements, and rollers, as sliding elements are preferably elements are used, the sliding surface are adapted to the nature of the base.
  • the sliding surface is provided with a corresponding layer which allows it to slide on the carpet.
  • a Teflon or nylon coating is particularly suitable.
  • a smooth floor space parquet, stone floor, or the like
  • a sliding surface is used, for example plastic or felt.
  • roll is to be understood in this context as a wheel or a roller which can rotate about a wheel axle. Particularly advantageous are rollers that are rounded. Twin roles are referred to as roles.
  • FIGS. 1A to 1C is the behavior of a conventional office chair shown.
  • the section of a foot element 4 of a star-shaped foot cross (foot part) is shown.
  • a suspension 6 is arranged, which carries a roller 8.
  • the suspension 6 comprises a fork 6.1 with a receptacle 6.3 (for example a borehole) for a guide pin 6.2.
  • the guide pin 6.2 sits in turn in a receptacle 6.4, which is provided in the foot element 4.
  • a sleeve is inserted into the receptacle 6.4.
  • This sleeve is not shown in the figures for the sake of simplicity.
  • the guide pin 6.2 defines a guide axis 6.5, which is perpendicular to a base 9 in the example shown. Between the guide shaft 6.5 and the wheel axle 8.1 there is a small offset, which is referred to here as eccentric bearing.
  • FIGS. 2A and 2B Another conceivable variant of a chair is in the FIGS. 2A and 2B shown.
  • the variant of the chair shown differs essentially thereby from the chair of FIGS. 1A to 1C in that the guide shaft 6.5 is inclined. If the chair is now pulled in the positive X direction, then the roller 8 follows the foot element 4, as in FIG Fig. 2A shown. The roller rotates clockwise, as shown by the arrow 8.2. This position is relatively stable, since the virtual starting point A1 is closer to the base 9 than in the arrangement in the FIGS. 1A to 1C , If the chair is now moved in the opposite direction, ie parallel to the negative X-axis, then the results in Fig. 2B shown state where the roller 8 runs behind the foot element 4.
  • the roller 8 in the extreme case shown (the guide shaft 6.5 is parallel to the ground 9 and cuts the wheel axis 8.1) no longer fast-moving.
  • the foot part of the chair is designed so that it acts resilient under load. This effect can be achieved either by resilient, elastic mounting of the foot elements, or by the fact that the Fusselememente themselves act resilient. It is also possible to combine both effects
  • a foot part according to the invention is made at least partially movable and / or feather soft.
  • a chair may, for example, have movably mounted foot elements (chair legs), spring-elastic foot elements (chair legs) or a combination of such foot elements.
  • Such a chair may, for example, have glides or castors on movably mounted foot elements (chair legs), on resilient foot elements (chair legs) or on a combination of such foot elements.
  • rollers serve as support elements, wherein this focus is not intended to be restrictive to roller-based embodiments.
  • the individual rollers 8 of the chair 1 are still movable - speak unbraked - and can roll radially to a central axis 11 of the chair 1, to allow a (resilient) up and down of the chair 1, as in the FIGS. 4A to 4D indicated schematically.
  • a dynamic sitting is thus still possible according to the invention, even if the braking effect, as described, occurs.
  • sliding elements of support elements are used, they can also be aligned radially to a central axis of the chair.
  • the guide axle and the wheel axle of a roller suspension are related to one another in such a way that, when the chair is loaded, the roller changes from a so-called unstable position to a so-called stable position.
  • This transition is referred to herein as a dip.
  • This immersion movement is clearly noticeable on the chair, depending on the embodiment, and includes a rolling and pivoting movement of the rollers (double eccentric action).
  • a roller performs a small rolling motion around the wheel axle during the dipping movement and the roller pivots about 180 degrees about the guide axle.
  • the roller tilts over one of its edges which define the transition of the tread into the side wall of the roller.
  • the aforementioned effects that occur when the rollers move from one position to another, more stable position are influenced by various parameters, but essentially either support or mitigate the effects.
  • An example is the shape of the roles. If cylindrical rolls or twin rolls are used whose cylinder axis corresponds to the wheel axis, it is more difficult to reverse the rolls depending on the dimensions. On the other hand, thinner rollers or spherical rollers are easier to pivot around the guide axis because their running surface has a smaller extent parallel to the wheel axis.
  • Another parameter is the eccentricity (initially referred to as offset), i. the distance of the guide axis 6.5 with respect to the wheel axle 8.1.
  • offset eccentricity
  • Another possibility to influence the mentioned effects results from the storage of the rolls. Smooth-running rollers follow the movements of the chair faster and you can give the chair agility in its behavior. By a slightly braked storage of roles, the behavior can be damped. The chair behaves less aggressively.
  • the support points of the support elements of the chair when viewed from a central axis of the chair move radially outwardly displaced and thereby increase the radius of the support surface. This automatically leads to an increase in the stability of the chair.
  • the restoring force can also result from the fact that the foot elements 4 themselves, or sub-elements thereof, are designed to be resilient.
  • a foot element due to its shape and / or the materials used to show a resilient effect.
  • the foot elements 4, or sub-elements thereof deform when the chair 1 is loaded. With increasing deformation, a force sets in (restoring force), which counteracts the deformation.
  • the restoring force can also result from a combination of several of the mentioned effects.
  • Fig. 4C 1 is a schematic top view of a chair 1 having only four rollers 8 arranged in a star shape with respect to a vertical axis 11 of the chair 1.
  • the chair 1 is in Fig. 4C shown in an unloaded condition.
  • the chair 1 defines by the support points of the rollers 8 with the base 9 a bearing surface, which is indicated by a circle with the diameter A1.
  • FIGS. 4A and 4B show a sectional view that intersects two of the four rollers 8 that lie in the plane of the drawing.
  • the two rollers 8 each have a fork 6.1 with a guide pin 6.2.
  • the pin 6.2 defines the guide axis 6.5.
  • the guide axes 6.5 of all rollers 8 intersect at centric load in the vertical axis 11.
  • the guide shafts 6.5 are in the in Figs. 4A and 4C State shown relatively steep.
  • the inclination angle ⁇ is typically in this state between 0 and 30 degrees and preferably between 0 and 10 degrees.
  • the guide axis 6.5 have a negative angle ⁇ in the unloaded state.
  • Prerequisite for the inclination of the guide axis (s) of the rollers are resilient, elastic bearing legs with restoring force, or in resilient legs.
  • FIGS. 5A and 5B Shown is a schematic side view of a chair 1.
  • the chair 1 is constructed essentially mirror-symmetrical. For the sake of simplicity, only part of the chair 1 is shown.
  • the chair 1 comprises a seat surface (not shown) and a central pillar 3, which is rigidly connected to the foot elements 4.
  • a rigid base with three, four or five foot elements 4 may be provided. But it can also be a disc, ring or cup-shaped foot element are used in the middle of the column 3 is attached.
  • the column 3 may have at the lower end a cone which sits, for example, in a central hole of such a base or foot element.
  • the roller 8 is from a suspension carried, which includes a fork 6.1. At the upper end of the fork 6.1, a guide pin 6.2 is arranged, which is mounted tiltably in the base element 4. If the chair 1 is loaded, then this lowers and the rollers 8 perform a dip, as in Fig. 5B shown, in which the guide axis 6.5 inclines by an inclination angle ⁇ . Depending on the load, the guide shafts 6.5 vary widely when the chair 1 lowers. The bearing surface increases. By tilting the guide shafts 6.5 results in a resilient behavior of the foot part of the chair. 1
  • FIGS Figures 6A and 6B Shown is a schematic side view of a chair 1, the chair 1 is constructed essentially mirror-symmetrical. For the sake of simplicity, only part of the chair 1 is shown.
  • the chair 1 comprises a seat surface 2 and a central pillar 3.
  • the seat height can be adjusted, for example, as in conventional chairs by the height that a lifting spindle 13 is mounted in a thread of the column 3.
  • the suspension of the rollers 8 on the foot elements 4 is rigid.
  • the foot elements 4 are movably attached to the chair 1 in such a way that changes the inclination of the guide axis 6.5 with respect to the base 9 by a movement of a foot member 4.
  • the foot element 4 is connected at its upper end via a horizontal axis 3.4 pivotally connected to the column 3.
  • This articulation on the column 3 is shown purely schematically.
  • the guide axis 6.5 of the roller 8 is slightly inclined.
  • the angle of inclination ⁇ at rest is between -5 and 10 degrees. If the chair 1 is centrally loaded, as in Fig. 6B shown, the rollers 8 move radially outward.
  • the foot member 4 is deflected, the inclination angle ⁇ is larger.
  • the inclination angle ⁇ can assume an inclination of up to 60 degrees.
  • a greatly simplified return element 12 is in Fig. 6B indicated. It acts on the foot member 4 with a restoring force R, which is directed radially to the axis 11 out.
  • R restoring force
  • the movement behavior of the foot elements 4, which is determined by the type of suspension and the provision of return elements is referred to as resilient.
  • the foot part of the chair 1 has at least three foot elements 4 and a central pillar 3, each of the foot elements 4 being suspended mechanically with respect to the pillar 3 such that the foot elements 4 are under load on the chair 1, as in connection with FIGS Figures 6A and 6B described, perform a pivoting movement and move apart radially.
  • the foot elements 4 are acted upon by a restoring force R.
  • a rigid suspension of the rollers 8 on the foot elements 4, in which they can rotate about the guide axis 6.5, but their inclination with respect to the foot elements 4 does not change.
  • Such an embodiment, as in the Fig. 6A, 6B shown, can be modified by the guide shaft 6.5 is tiltably mounted, resulting in load of the chair 1 to a superposition of two tilting movements. This also changes the elastic effect.
  • FIGS. 7A and 7B Shown is a schematic side view of a chair 1.
  • the chair 1 is constructed essentially mirror-symmetrical. For the sake of simplicity, only part of the chair 1 is shown.
  • the chair 1 comprises a seat surface (not shown) and a central pillar 3.
  • Foot elements 4 are provided which are rigidly connected to the pillar 3.
  • the suspension of the rollers 8 on the foot elements 4 is rigid. If the chair 1 is centrally loaded, as in Fig. 7B shown, the rollers 8 move radially outward, since the foot elements 4 are subject to deformation. Depending on the stiffness of the foot elements 4, this deformation may be more or less pronounced.
  • a disc-shaped, ring-shaped or cup-shaped foot element 4 can also be used, this element 4 being made elastic.
  • the spring-elastic effect results in this embodiment essentially from the elastic deformability of the foot elements 4.
  • Fig. 7A the inclination angle ⁇ was about 0 degrees. Under load, the angle of inclination ⁇ increases, as in Fig. 7B indicated. With elastically deformable foot elements 4, changes in the inclination angle ⁇ between -5 and 30 degrees can be generated. Preferably, the inclination angle is between -5 and 10 degrees.
  • FIG. 8A and 8B a further embodiment is shown. Shown is a schematic side view of a chair 1.
  • the chair 1 is constructed essentially mirror-symmetrical. For the sake of simplicity, only part of the chair 1 is shown.
  • the chair 1 comprises a seat surface (not shown) and a central pillar 3.
  • the column 3 is in the example shown with its lower end, which is preferably made conical, in the foot element 4, as indicated schematically by a dashed line.
  • the suspension of the rollers 8 on the foot element 4 is rigid. If the chair 1 is loaded centrally, then the rollers 8 move radially outward, since the foot element 4 is subject to deformation. Depending on the stiffness of the foot element 4, this deformation may be more or less pronounced.
  • the foot member 4 may also be executed ring or cup-shaped.
  • the inclination angle ⁇ is loaded chair 1 between 0 and 30 degrees.
  • the inclination angle is between 0 and 10 degrees.
  • the spring-elastic effect results in this embodiment essentially from the elastic deformability of the foot element 4.
  • FIG. 9 Another embodiment is in Fig. 9 shown.
  • a chair 1 comprising a foot part comprising a vertical pillar 3 and a foot element with six legs 4.
  • a roller 8 is mounted, each of the rollers 8 mounted to roll about a wheel axle 8.1 a suspension and is freely rotatably connected via a guide shaft 6.5 with the respective leg 4.
  • the suspension of the rollers 8 is rigidly connected to the legs 4, ie the rollers 8 can rotate together with their suspension about the guide axis 6.5, but the inclination of the guide axis 6.5 with respect to the legs 4 is not variable.
  • the embodiment shown is characterized in that the legs 4 are suspended mechanically in relation to the column 3 in such a way that, when the chair 1 is loaded, they make a pivoting movement and move apart radially.
  • the bearing comprises an elastic ring element 4.1, which is arranged at the lower end of the column 3.
  • the legs 4 extend radially through the ring element 4.1.
  • the ring member 4.1 By the ring member 4.1, the mechanical suspension of the legs 4 is protected and the ring member 4.1 causes a restoring force on the legs 4.
  • Fig. 9 The chair 1 after Fig. 9 is shown in an unloaded condition and the rollers 8 occupy a position at which the guide shafts 6.5 are substantially perpendicular or, if initial blocking is desired, are slightly inclined negatively. Due to the vertical or slightly negative slope, the degrees of freedom of the rollers 8 are not significantly limited and the rollers 8 follow easily each movement of the chair first
  • the legs 4 are made of a plastic, ideally made of a fiber-reinforced plastic, or die-cast aluminum.
  • a plastic ideally made of a fiber-reinforced plastic, or die-cast aluminum.
  • other materials such as wood possible.
  • an elastic effect can be achieved.
  • a seat 2 and a backrest 2.2 is provided which is mounted with a holder 2.1 below the seat 2.
  • the legs 4 themselves can be made elastically deformable.
  • the deformability can be achieved, for example, by a lateral torsion of the axes of the legs 4.
  • the restoring force acting on the legs 4 of the chair 1 can be adjusted via a spring element (for example a spring) which is attached to the column 3.
  • a spring element for example a spring
  • Such a spring 14 is in Fig. 9 shown.
  • This spring 14 is optional.
  • the degrees of freedom of the movement can be controlled by influencing an elastic element, which is arranged in the region of the column 3.
  • Fig. 10A is a side view of the foot part of a chair and Fig. 10B is a section along the line AA.
  • the chair has a central column 3, which in the example shown comprises a gas spring of conventional design.
  • the gas spring consists of elements 3.1, 3.2 and 3.3. By the gas spring, a seat of the chair can be adjusted in height.
  • There are a total of five curved legs 4 are provided. At each of the five legs 4, a roller 8 is mounted, each of the rollers 8 is mounted rollably about a wheel axle 8.1 a suspension 6.1 and is freely rotatably connected via a guide shaft 6.5 with the respective leg 4.
  • the suspension 6.1 of the rollers 8 is rigidly connected to the legs 4, ie the rollers 8 can rotate together with their suspension 6.1 to the guide axis 6.5, but the inclination of the guide axis 6.5 with respect to the legs 4 is not variable.
  • the embodiment shown is characterized in that the legs 4 are suspended mechanically in relation to the column 3 in such a way that they make a pivoting movement when the chair is loaded and move radially apart from one another.
  • the bearing comprises a ring element 4.1, which is arranged at the lower end of the column 3.
  • Each of the legs 4 sits in a sleeve 4.2, as in Fig. 10B to recognize.
  • For each of the legs 4 a separate pivot axis 4.3 is provided.
  • pivot axes 4.3 are preferably arranged tangentially to the cylindrical circumference of the column 3 and extend perpendicular to the central axis 11 of the chair.
  • the ring element 4.1 has in the embodiment shown an upper ring 4.4 and a lower ring 4.5. Between these two rings, an elastic ring element 4.6 is arranged, which exerts a restoring force on the ends of the legs 4, if the legs 4 are pivoted about the pivot axes 4.3.
  • the restoring force arises from the fact that when pivoting a leg 4, a part of the elastic ring element 4.6 is compressed (deformed).
  • the degrees of freedom of the movement can be controlled by influencing the elastic ring element 4.6 by means of a spring or disk.
  • Such an influence can for example be realized in such a way that the elastic ring element 4.6 can not or only limitedly deform upwards under load from one of the legs 4.
  • the rollers 8 sit in a suspension that is fork-shaped, as in Fig. 10B can recognize.
  • the bearing of the rollers 8 is also eccentric here, ie the guide shafts 6.5 and the axles 8.1 do not intersect each other.
  • the elastic effect results in this embodiment essentially from the special storage / suspension of the legs. 4
  • FIG. 11A is a perspective view of the foot part of a chair.
  • the chair has a foot part with five legs 4 and a central pillar 3.
  • Fig. 11B shows a partial section through a lower portion of the chair.
  • Fig. 11C is shown a plan view of the foot, in which the radial arrangement of the legs 4 can be seen.
  • Each leg 4 is connected via a mechanical suspension 4.7 individually with an annular element 4.1.
  • Fig. 11D is a section along the line AA and Fig. 11E is a section along the line CC.
  • each of the legs 4 is connected via a clamping element 4.7, for example in the form of a steel cable, hingedly connected to the annular element 4.1.
  • the clamping element 4.7 is seated in an elastic shell, which is shown in the figures dark gray. Depending on the tension of the clamping element 4.7, the "elasticity" of the suspension can be adjusted.
  • the legs 4 are made of a plastic, ideally made of a fiber-reinforced plastic, or die-cast aluminum, or made of wood.
  • FIG. 12A A section through another chair 1 according to the invention is shown in FIG Fig. 12A shown.
  • a schematic side view is the Fig. 12B refer to.
  • the chair 1 has a plurality of legs 4, which are suspended mechanically with respect to a central pillar 3.
  • a seat 2 At the upper end of the column 3, a seat 2 is arranged.
  • the column 3 comprises a spring mechanism whose individual elements are not further described here. It should merely be noted that one can act by adjusting the hood 14.1 on the spring 14.2 so that the degrees of freedom of movement are controlled by influencing an elastic ring element 4.11. Such an influence can, for example, be realized in such a way that the elastic ring element 4.11 can not deform or only slightly deform upwards under load from one of the legs 4.
  • the mechanical suspension of the chair legs is carried out as follows.
  • the annular element 4.9 is preferably designed so that it yields when one of the legs 4 moves upwards, as in approaching in Fig. 12B can be seen.
  • the restoring force which acts on the legs 4 can be adjusted by the pressure of the spring 14.2, which acts on the elastic ring element 4.11.
  • the legs 4 are pivotally connected to a supporting part of the column 3. During assembly, the legs 4 can be hung simply before the lower annular element 4.10 and the upper annular element 4.9 is used. Such a connection of the legs 4 with the column 3 can be done for example by means of a thru axle or the like.
  • the elastic elements / segments 4.8 and 4.11 form, as in Fig. 12B 4.
  • the chair leg 4 compresses the element / segment 4.11 and it raises a restoring force.
  • the element / segment 4.11 is provided with an oblique surface 4.12 which points obliquely away from the central axis 11 of the column 3.
  • the material of the elastic element / segment 4.11, its thickness and the action of the spring 14.2 the restoring force can be influenced.
  • an elastomeric ring 4.11 is used, which is cylindrical in the lower region and conically shaped in the upper region, wherein the conical part defines the surface 4.12.
  • the elastic effect results in this embodiment essentially from the special storage / suspension of the chair legs. 4
  • a further preferred embodiment is shown.
  • the foot of a chair is shown, which has a central pillar 3.
  • the chair has six legs 4, four of which are visible in the view.
  • Each of the legs 4 has an L-shape with the L lying and the short leg 4.16 of the L's parallel to the central axis 11 of the column 3.
  • the long leg 4.15 of the L's runs substantially parallel to a standing surface 9.
  • On the short leg 4.16 a plurality of spaced-apart recesses 4.13 are provided.
  • the legs 4 are arranged around the pillar 3 so that an elastic, annular element 4.14 may comprise the six legs 4 and come to lie in the recesses 4.13. In the embodiment shown, the annular element 4.14 is seen in the second recess from above.
  • the legs 4 can be clamped by discs 3.4, 3.5 or the like. Depending on the position of, or number of annular elements 4.14 to change the lever arm and thus the hardness of the setting.
  • the legs 4 can move radially in planes that are perpendicular to the central axis 11. These levels form an angle of 60 degrees with each other, if six legs 4 are provided.
  • an elastic ring or other elastic body may be positioned from below between legs 4. By such an element, an initial spread of the legs 4 can be specified.
  • the spring-elastic effect results in this embodiment essentially from the special support of the legs 4 and the spring element 4.14.
  • the legs 4 themselves may be elastic and bend under load.
  • the ring 4.14 can be made inelastic and causes a change in the length of the elastic legs 4 (lever length).
  • the legs 4 are designed so that their length can be changed.
  • the legs 4 may be telescopically extendable, for example.
  • FIG. 14 Another embodiment is in the detailed view of Fig. 14 shown.
  • a central column 3 has at the lower end a cylindrical extension 3.7, which is arranged concentrically to the central axis 11.
  • an elastic, bulbous element 3.6 Arranged around this cylindrical extension 3.7 is an elastic, bulbous element 3.6, which forms a cavity 3.9 in the example shown.
  • the legs are connected to the elastic, bulbous element 3.6, as shown by a single leg 4.
  • a recess 6.4 is provided for receiving the guide pin of a roller suspension.
  • the element 3.6 may be provided with a valve 3.8, which allows to change the pressure in the cavity 3.9 and thereby the spring characteristic of the element 3.6 influence.
  • a bulbous element 3.6 for example, a cylindrical, or a different shaped element can be used.
  • the spring-elastic effect results in this embodiment essentially from the special suspension of the legs 4.
  • All roll-based embodiments have in common that the guide axle and the wheel axle of a roller suspension are related to one another in such a way that the rollers change from a so-called unstable position into a so-called stable position when the chair is asymmetrically loaded. Through this transition (immersion movement), the degrees of freedom of the musculoskeletal system of the chair are reduced. This leads to the braking effect by which the chairs according to the invention are distinguished.
  • rollers 8 In the case of asymmetrical loading of a chair 1 according to the invention with rollers 8, the rollers 8 automatically assume a position due to the immersion movement, in which at least two of the rollers 8 point in different directions and thereby brake the entire chair 1 with respect to the standing surface 9.
  • the dip occurs when the angle of inclination, i. the angle of the guide axis 6.5 with respect to the vertical chair axis 11, depending on the load of the chair 1 changed.
  • the inclination angle ⁇ of the guide shafts 6.5 of the rollers 8 with respect to the vertical axis 11 is between -5 and 30 degrees. Particularly advantageous is an inclination angle ⁇ between -5 and 10 degrees.
  • the inclination angle ⁇ may be smaller than in rolls 8 or rollers whose edge regions are less round.
  • the chair is designed to be assigned a defined seating direction. This can be achieved, for example, by the fact that the seat surface can not be turned relative to the base of the chair comprising the elements 3, 4, 6 and 8.
  • the seat 2 can be guided with a vertical groove in the column 3, which allows a vertical up and down movement but no rotation about the vertical axis 11. If the seat direction is fixed, then the resilient action of the foot elements 4 can be set differently at the front than at the rear. For example, it is easier to bob forward with the chair than backwards.
  • a further embodiment is characterized in that an adjusting means 15 is arranged between the vertical column 3 and the legs 4, the attachment points of which can be displaced vertically along the column 3 and / or horizontally along the legs 4, as in FIG Fig. 15 schematically indicated by double arrows.
  • the initial spread can be set and / or the intensity of the voltage can be set.
  • the length of the adjusting means 15 or the hardness / elasticity of the same can be changed and there are slits 15.1, 15.2 provided for moving.
  • the adjusting means 15 can be fixed, for example, after displacement by means of screws or the like.
  • Such an adjustment means 15 can also be integrated into the column 3 in order to reduce the risk of injury by pinching.
  • FIG. 16 Another embodiment is in Fig. 16 shown.
  • a perspective view of a foot part 5 is shown.
  • An embodiment of a spring arrangement for the foot elements 4 is shown.
  • the foot elements 4 engage on a spring steel ring 20 by means of slots or the like.
  • the spring steel ring 20 is slipped over an annular projection of an elastomeric spring 17, which has a disk-shaped element 18 at the top.
  • a washer may be provided which covers the elastomer spring 17 and the spring steel ring 20 from below.
  • the washer can be secured, for example by means of a screw on the leg tube 15, which is part of a column 3, or on a leg tube.
  • the elastic effect results in this embodiment essentially from the special suspension of the legs 4.
  • the legs 4 itself can be rigid or inherently resilient.
  • Fig. 17 is a further embodiment of a Federanorndung for the foot part 5 is shown.
  • the spring assembly 17 is formed as a leaf spring assembly, in which one or more leaf springs 19 are arranged in the foot elements 4.
  • Fig. 17 schematically four leaf springs 19 different length associated with a foot element 4.
  • the design, shape and number of leaf springs 19 is at the discretion of the expert, since these are adapted to the corresponding needs.
  • the illustrated construction may be provided from a pin plate 24 with clamping disk 25.
  • the pin plate 24 clamped with its upper flange 24 'and the lower clamping plate 25, the inner end of the leaf springs 19 together.
  • a thread is provided at the free end of the pin 24 "onto which a nut is screwed to provide the necessary holding force.”
  • the overall package may be disposed in a hollow formation of a foot member 4. This makes it possible to use the leaf spring assembly 19 in plastic or plastic The elastic effect results in this embodiment essentially from the special embodiment of the legs 4, which act in themselves resilient.
  • Fig. 18 shows an arrangement in which a conical leaf spring 19 is completely embedded in a foot element 4 of plastic material having elastic properties.
  • the elastic effect results in this embodiment essentially from the special embodiment of the legs 4, which act resiliently.
  • Fig. 19 shows a next embodiment, in which the foot member 4 is held by means of a hinge 26 to a joint bearing member 27 at the lower end of the leg part 3.
  • a slot 16 of the foot member 4 engage over a resilient ring, which is not shown for simplicity.
  • the elastic effect in this embodiment results essentially from the special suspension of the legs 4.
  • the legs 4 per se may be rigid or inherently resilient.
  • FIG. 20 A next embodiment is in Fig. 20 shown in which the hinge struts 26 are replaced by one or more springs 26 '.
  • the foot member 4 can overlap with a slot storage, for example, as in Fig. 12A shown, an axle pin 14 ', which may be held stationary or by means of a suspension 14 "movable.
  • the cap 17 can prevent jamming.
  • the spring effect results in this embodiment essentially from the special suspension of the legs 4.
  • the legs 4 at they can be rigid or elastic in themselves.
  • FIG. 21 A next embodiment is in Fig. 21 shown.
  • a restoring force of compression springs 19 is generated, which are arranged between a vertical leg of a foot member 4 and a leg tube 3.
  • the compression spring 19 is compressed and thus generates a restoring force.
  • instead of a compression spring and an elastomeric material may be used.
  • the elastic effect in this embodiment results essentially from the special suspension of the legs 4.
  • the legs 4 per se may be rigid or inherently resilient.
  • a further embodiment of the invention is shown.
  • the foot member 4 is divided into a movable part 4 'and a rigid part 4 ".
  • the movable part 4' is hinged to the rigid part 4".
  • a spring arrangement 19 is formed between the two parts 4 'and 4 "In the illustrated example, a joint 44 is provided on the underside of the foot element 4 which serves as a hinge between the movable part 4' and the rigid part 4".
  • the opposite each other Surfaces of the parts 4 'and 4 together form a V-shaped cutout in which the compression spring 19 is inserted.
  • the movable part 4' pivots against the spring force of the compression spring 19 and thus experiences a restoring force.
  • the elastic effect results in this embodiment essentially from the special embodiment of the legs 4, which act resiliently.
  • the offset between the guide shaft 6.5 and the wheel axle 8.1 which is referred to here as eccentric bearing, according to the invention is typically between 0.5 cm and 5 cm. Particularly advantageous is an offset between 1 cm and 3 cm.
  • the choice of the appropriate offset is important, since neither in too small nor too large an offset occur the inventive effects of the braking effect. If the offset is too great, safety problems can occur, in particular if the guide axes have too great a negative inclination ⁇ , since in this case the rollers are too close to each other in the unloaded state.
  • Particularly suitable are rollers that have a diameter between 1 and 8 cm.
  • rollers with a diameter between 2 and 5 cm are particularly advantageous.
  • the individual components of the chair are the resilient legs, for example, caused by the action described in connection with the drawings 5A, 5B, 6A, 6B, or 7A, 7B.
  • a chair according to the invention support elements (for example, rollers) which only show the braking effect described by the resilient legs.
  • a chair according to the invention not only exhibits the described braking effect if rollers are used, but generally increases its contact surface under load and, due to the runnability of the rollers or the sliding ability of the sliding elements, enables a virtually frictionless and secure up and down movement parallel to the vertical axis 11 Through the combination and interaction of these effects, a chair can be provided that meets all requirements in terms of safety, dynamics, health and comfort.
  • Fig. 23 shows in axial sectional view another embodiment of a pendulum stool 1 with a seat part 2, a leg part 3 and foot elements 4, which project radially from a foot part 5.
  • three such foot elements 4 can be seen.
  • any number of such foot elements can be arranged on a foot part, usually between four and six.
  • a spring assembly 6 is fixed, which allows up and down swinging of the seat part 2 on the foot part 5.
  • the foot elements are provided with rollers 8 at their free ends.
  • the lower part of the leg part 3 arranged foot part 5 has a holding arrangement 10, on which the foot elements 4 suspended substantially individually and are mounted up and swiveled.
  • a second spring arrangement 9 is provided, which cooperates with the holding arrangement 10.
  • the holding arrangement 10 has in the illustrated embodiment over a circumference of 360 ° distributed holding segments 10 ', which define a free cross section and have a distance from each other.
  • the spring arrangement 9 consists in the illustrated embodiment of an elastomeric ring inserted into the free cross-section, which widens cylindrically in the lower region and conically outwardly in the upper region.
  • the retaining segments 10 ' have a corresponding conical flattening.
  • a pivot pin 14 is installed, on which, as will be explained later, the foot elements 4 can be hooked.
  • the lower part of the leg part 3 is inserted and connected on its side facing the floor with a closure member 13 with the foot part.
  • the spring force of the spring arrangement 6 can be adapted to a user by means of the adjusting device 7.
  • this adjuster 7 also serves to adjust the restoring force to the extent of the desired pendulum motion.
  • Fig. 24 shows a pendulum stool in a perspective view obliquely from below. Thus one looks from below on the foot part 5 with the closure piece 13.
  • Fig. 25 shows a schematic representation of the arrangement of foot elements 4.
  • slot 16 are formed at the leg-side ends, which open downward. With this slot 16, the foot elements 4 are mounted on the axle 14.
  • the inner end faces of the foot elements 4 are provided with a bevel 4 ', with which they rest against the conical outer surface 9' of the molded cone of the spring element 9.
  • a cap 17 is arranged made of elastic material. Under the cap rollers 38 are provided, against which the back of the foot elements 4 and roll along during their pivotal movement. Since the cap 17 is set substantially translationally in the axial direction of the leg portion, it exerts a restoring moment on the respective foot elements 4, if they perform a pivoting movement upwards.
  • Fig. 26 shows a further embodiment of a spring assembly 9.
  • the spring assembly 6 which is mainly responsible for the up and Abschwingterrorism the stool, with in the provision of the spring forces for the restoring moments acting on the foot elements 4 acts.
  • the spring 6 is supported via the plate 11 on a transfer plate 6 'on the ring of retaining segments 10' from.
  • a foot member 4 performs a pivoting upward, so presses its inclined surface 4 'against the conical spring mass of the ring 9 and urges this material upwards, and the material would like to expand and in turn pushes against the transfer plate 6 ', which is supported against the abutment plate 11.
  • this abutment plate 11 is spring-loaded, acts on a spring element 4, which is pivoted upwards, both the restoring force of the spring assembly of the material 9 and the force of the spring 6, so as to push back the spring element 4 in the original direction.
  • the abutment plate 11 is axially displaceable along the tube 15 of the leg part 3. The abutment force previously provided by the axial fixed plate 11 is provided by the body segment assembly 10 in this embodiment.
  • Fig. 27 is a perspective view of the support assembly 10 with six retaining segments 10 'and an inserted annular elastomeric spring assembly 9 is shown.
  • the holding arrangement consists, as already in connection with Fig. 23 explained, in the illustrated embodiment of annularly arranged holding segments 10 ', each having a predetermined distance, measured in degrees from each other.
  • a holding arrangement is formed between the individual holding segments, in the illustrated embodiment an axle bolt 14.
  • an inclined surface 10 ", which considered in the totality of all holding elements form a conical bearing surface for the conical upper portion 9" of the elastomeric spring ring 9.
  • the elastomeric spring ring 9 is formed in the illustrated embodiment as a one-piece elastomeric ring, which is enclosed in its lower portion by the cylindrical portions of the retaining segments 10 ', that is applied to the cylindrical portion of the holding elements 10' and in the upper region a conical extension has, which rests on the conical surfaces 9 '.
  • the plate 6 'in diameter substantially designed so that it rests in the region of the upper inner edges of the retaining segments 10'.
  • Fig. 28 illustrated embodiment in which the tube assembly of the leg part 3 and the foot part 5 are shown in the sectional detail, the support surface of the spring 6 on the elastomeric material of the spring assembly 9 substantially lower.
  • the diameter of the transfer plate 6 ' is slightly smaller than a recess in the overlying abutment plate 11.
  • the clear width is dimensioned so that the tube 15 of the leg part 3 can pass and with appropriate loading a sitting on As a result, the leg part undergoes a spring-soft stop position with maximum compression of the spring.
  • the elastic material 9 presses upwards and consequently the transfer plate 6 'in the recess of the abutment plate 11.
  • Between the transfer plate 6' and the abutment plate 11 can be an elastic Be arranged intermediate layer.
  • This embodiment allows a gimbal of the leg tube, which passes with a pipe extension 15 'through the elastic ring 9 and is fixed to the lower side of the support assembly 10 by means of a screw 19 on the bracket.
  • a screw connection not shown, is supported via a shim structure on the holding arrangement 10.
  • Fig. 29 shows a next embodiment of a spring arrangement for the foot elements 4.
  • the foot elements by means of the slots 16 on a spring steel ring 20 at.
  • the spring steel ring 20 is as out Fig. 30 can be seen, slipped over the annular projection of the elastomeric spring 9 and closes flush with this at the bottom edge.
  • a washer 21 is provided, which covers the elastomer spring 9 and the spring steel ring 20 from below. The washer is secured by means of a screw connection to the leg tube 15 or to a leg tube 15 '.
  • the foot element 4 preferably has at its lying between the slot 16 and the leg end lower edge of a chamfer 22, which allows the foot member 4 to pivot upward without the washer 21 counteracts.
  • the foot member 4 may be formed on the foot member 4 integrally formed on the leg end radially projecting projection which instead of oblique surfaces with a downwardly directed surface a substantially vertically downwardly directed pivoting force on the elastomer ring 9 exerts.
  • the elastomer ring 9 may be formed as a simple elastic tube sleeve with a correspondingly thick wall thickness, which receives the pivoting force by means of its upwardly directed end wall.
  • a corresponding recess 23 is provided on the elastomer ring, to allow the overlap of the steel spring ring 20 through the slot 16.
  • Fig. 31 a further embodiment of a spring arrangement for the foot part 5 is shown.
  • the second spring arrangement 9 is designed as a leaf spring arrangement in which one or more leaf springs 9 "are arranged in the foot elements
  • Fig. 31 schematically four leaf springs 9 "of different length associated with a foot element 4.
  • the design form and the number of leaf springs 9" is at the discretion of the skilled person, since they are adapted to the respective needs.
  • the illustrated construction may be provided from a pin plate 24 with clamping disk 25.
  • the bolt plate 24 clamps with its upper flange 24 'and the lower clamping disk 25 the inner end of the leaf springs 9 "together.”
  • a thread is provided, onto which a nut is screwed to apply the necessary holding force ,
  • the entire package can be arranged in a hollow shape of a foot element 4. This makes it possible to embed the leaf spring assembly 9 in plastic or an elastomer.
  • Fig. 32 shows an arrangement in which a conical leaf spring 9 is completely embedded in a foot member of plastic material having elastic properties.
  • Fig. 33 shows a next embodiment in which the foot member 4 is held by means of a hinge 26 to a joint bearing member 27 at the lower end of the leg part 3.
  • the slot 16 of the foot member 4 engage over a resilient ring; which is not shown for the sake of simplicity.
  • FIG. 33a A next embodiment is in Fig. 33a shown in which the hinge struts 26 are replaced by one or more springs 26 '.
  • the foot member 4 with the slot 16 overlap a storage, for example, as in Fig. 23 shown, a pivot pin 14, which may be held stationary or by means of a suspension 14 'movable.
  • Fig. 34 shows a next embodiment of a spring assembly 9 on the foot part 5.
  • the foot elements 4 substantially in the shape of an L with a bottom leg 29 and a vertical leg 29 ', wherein the horizontal bottom leg 29 is formed longer than the vertical leg 29th '.
  • a spring arrangement 9 is provided, which acts on the one hand on a corresponding retaining projection 30 under the horizontal leg of the foot member 4 and the other on the leg part 3.
  • each of the foot members 4 is pivotally supported via a suspension 28 in this angular range. In a pivoting movement, the foot member 4 is pushed upwards and rotates about the suspension 28.
  • the spring assembly 9 restoring force, which causes a moment against the pivoting or pendulum movement of the chair.
  • Fig. 35 is a variant of the embodiment of Fig. 12 shown.
  • the restoring moment is not generated by under the foot elements 4 arranged tension springs, but by compression springs 9, which are arranged between the vertical leg of a foot member 4 and the leg tube 3. In a pivoting movement, the tension spring is compressed and thus generates a restoring moment.
  • a compression spring and an elastomeric material may be used.
  • Fig. 36 shows a next embodiment of the embodiment according to. Fig. 34 ,
  • the upwardly projecting legs of the foot elements 4 are held at their upper end by means of a suspension 28 '.
  • the restoring spring force is provided by a resilient pull ring 9 ''', which is inserted at the outwardly directed back of the vertical leg 29' of the foot member 4 in bearing grooves 31 arranged there.
  • the ring 9 ''' can be arranged at different levels.
  • the larger or smaller distance to the suspension 28 ' results in a larger or smaller return torque. The closer the ring is arranged on the suspension 28 ', the lower the restoring moment; conversely, it increases with the distance to this suspension.
  • Fig. 37 shows a next embodiment in which the upwardly projecting legs of the L-shaped foot members 4 bear against a central wedge 32 at their inwardly directed edges.
  • This central wedge is axially displaceable along the leg part and allows for precise initial angular adjustment of the rollers on the foot parts 4.
  • a suitable suspension keeps the foot elements in position.
  • FIG. 38a and 38b Another embodiment with L-shaped foot elements 4 is in the Figs. 38a and 38b played.
  • the spring force for the restoring torque of the foot elements 4 is provided by a spring ring 9 IV , which is arranged substantially formed as a foot ring on the back of the horizontal leg 29.
  • the diameter of this spring ring 9 IV is chosen so that it comes to rest essentially on the outer regions of the foot elements 4.
  • the cross section of the foot ring 9 IV can be designed in a special way to provide a desired restoring force.
  • Fig. 38a has the spring ring g IV in cross section a z. B. approximately egg-shaped form, which provides a high relative to the cross-section restoring moment of the ring itself. However, it can also find a flat lying ring use, which has a softer return characteristic.
  • the foot part 5 is formed by an elastic hollow body 33, on the outer sides of the foot elements 4 are fixed substantially rigid.
  • the hollow body 33 preferably has a spherical shape.
  • the cavity 34 of the hollow body 33 is pressurized via a valve 35, and the outer wall of the hollow body 33 is elastically deformable, thereby allowing a foot member 4 attached thereto to perform a substantially spatial pivotal movement.
  • Fig. 41 shows a next embodiment of a foot part 5.
  • the holding arrangement is directly attached to a tubular extension 15 'of the leg part 3.
  • the tubular extension 15 ' has a retaining plate 36, on the underside of retaining webs 37 are provided, between which the axle pin 14 is attached.
  • a disk-shaped spring arrangement 9 is fastened under the retaining disk 36, against which the back 4 'of a foot element 4 rests.
  • a stop 38 is provided below the retaining disk 36, by which it is ensured that the foot member 4 can not disengage from the axle pin 14 during dynamic rocking movements.
  • the spring assembly 9 consists in the illustrated embodiment of a spring ring 9 V , which has a three-layer structure. It can be with these three layers may be any combination of different hard or soft elastomers, for example, the lowermost layer may consist of a non-elastomeric material, and it may, as in Fig. 20 illustrated, a certain geometry of the contact surfaces of at least two layers may be provided, which makes it possible to adjust by rotating the two respective layers by a predetermined angle a different spring characteristic.
  • the elastomeric ring 9 V which consists of an elastic material, the largest spring strength. If you now turn the uppermost layer by so many degrees, that both layers are offset by half a ramp length; Thus, one allows the elastomeric material of one layer, or, if it is both layers to such an elastomeric material, and the other layer to partially escape into the space created, resulting in a softer spring constant of the overall ring result.
  • these specially designed contact surfaces which in Fig. 42 have a coarse sawtooth pattern, in addition to a very fine sawtooth pattern, see Fig. Detail, be equipped, thereby preventing that a twisted in a predetermined position spring washer back rotates due to the dynamic movement.
  • An alternative embodiment of such an elastomeric ring 9, as in the embodiments according to FIGS. 41 and 42 may be that a rubber hose is used whose hardness can be regulated by higher or lower air pressure.
  • Fig. 43 shows a next embodiment of the invention.
  • the holding arrangement 10 is likewise formed on a sleeve on the tube part 15 'of the leg tube 3.
  • the foot elements 4 are arranged pivotably about the axle pin 14.
  • a pressure plate 39 is arranged on the leg-side end face of the foot member 4.
  • this pressure plate 39 pivots in the direction of the pipe section 15.
  • an elastomeric ring is placed around the pipe part 15, so that the pressure plate 39 more or less depending on the extent of pivotal movement of this ring 9 strongly compressed.
  • the elastic deformation exerts a restoring moment on the pressure plate and thus on the base element 4.
  • stopper 40 which are located radially outside the contact surfaces between the bottom and roller 8.
  • the stopper 40 is arranged rigidly on the foot member 4, the stopper 40 in which in the FIGS. 44 and 45 illustrated embodiment, an integral part of the roller suspension, ie, the stopper 40 forms an extension of the rotation axis 42 about which the roller 8 can be pivoted.
  • the end portion of the foot member 4 or the roller support may be so soft or articulated to a certain extent that in the pendulum load the rollers 8 "turn off” and thus the stoppers 40 can come into contact with the ground. As a result, a braking effect is achieved and the chair can not roll away.
  • the stopper 40 is rigidly always within the distance Stool center / role. In this way, the stopper 40 with its rubber stud 41 always come into contact with the ground when the pendulum tendency in the direction of the foot member 4 exceeds a certain number of degrees. The reason for this is that when swinging forward, the hinge point of the suspension of the foot member 4 on the support assembly 10 approaches the ground, a relative upward swinging motion of a foot member 4 occurs, but the angle between the foot member 4 and the floor becomes smaller. Also at in Fig. 47 illustrated embodiment, the stopper 40 is within the distance Stool center / role, namely in the immediate vicinity of the leg part tube 15. The stopper 40 here has the shape of a skirt whose outer edge is supported with a corresponding inclination of the leg part (3) on the ground.
  • This particular stopper assembly provides a safety feature that prevents the stool from rolling under the user in the direction opposite to the pendulum swing during excessive pendulum motion.
  • causes the stopper assembly which is radially outside of the contact point 43, a larger angle between the foot member 4 and the bottom, so that due to this inclination of the outer stopper 40 comes into contact with the ground and thus holds the stool in place.
  • This effect also occurs with the foot elements facing the one in the direction of which the pendulum motion is being performed. These remote foot elements also take a steeper angle of the bottom surface, resulting in a contact of the outer stopper 40 with the ground.
  • Fig. 48 an embodiment is shown in which the stopper 40 is pivoted by means of an actuating structure 44 during the pendulum forward and makes a touch contact with the ground.
  • the stopper 40 is pivotally mounted.
  • a further embodiment variation of the invention is shown.
  • the foot member is divided into a movable part 4 'and a rigid part 4 ".
  • the movable part 4' is articulated to the rigid part 4".
  • Between the two parts of the second spring assembly 9 is formed.
  • a hinge 44 serving as a hinge between the movable part 4 'and the fixed part 4 ".
  • the opposing parting surfaces of the parts 4' and 4" together form a V-shaped cutout, in FIG
  • the movable part 4 ' provides against the resistance force of the compression spring 9 "and in this way experiences a restoring moment.
  • this embodiment is not limited to the compression spring 9 "arranged in the V-cutout, so that a leaf spring may be provided instead of a compression spring In such a case, the V cutout enables the unhindered relative rotation of the two parts 4 'and 4 "against each other.
  • any other spring construction can be chosen which allows a restoring moment to be exerted between the parts 4 'and 4 "when the movable part 4' makes a relative pivoting movement as a result of the pendulum movement with respect to the fixed part 4".

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Rehabilitation Tools (AREA)
  • Chairs Characterized By Structure (AREA)

Claims (2)

  1. Chaise oscillante avec une partie de siège (2), une unique partie de pied centrale (3), une partie à pieds (5) qui y est agencée à l'extrémité côté sol, présentant une pluralité prédéfinie d'éléments de pied (4), et avec au moins un premier dispositif de ressort (6) coopérant avec la partie de siège (2),
    dans laquelle au moins un élément défini parmi les éléments de pied (4) est réalisé de manière mobile et est soumis à un moment de rappel élastique en cas de soumission à une charge,
    dans laquelle les éléments de pied (4) sont sensiblement agencés en forme d'étoile, et les éléments de pied (4) peuvent ce faisant sensiblement pivoter individuellement vers le haut et le bas,
    dans laquelle un deuxième dispositif de ressort (4.11, 9) vient en prise avec au moins un élément de pied défini (4),
    dans laquelle des moyens de rappel (4.8, 4.9, 4.10, 4.11, 4.12) sont prévus pour appliquer une force de rappel du deuxième dispositif de ressort (4.11, 9),
    dans laquelle, dans la zone inférieure de l'au moins une partie de pied (3), au niveau de la partie à pieds (5), au moins un dispositif de retenue (4.10-4.12) coopérant avec le deuxième dispositif de ressort (4.11, 9) est réalisé, au niveau duquel au moins un des éléments de pied (4) est réceptionné, et
    au niveau d'une extrémité côté pied d'au moins l'un des éléments de pied (4), au moins une fente (16) sensiblement ouverte vers le bas est réalisée, est accrochée au dispositif de retenue (4.10-4.12), et est maintenue en position avec au moins une pièce complémentaire.
  2. Chaise (1) avec au moins une unique partie de pied centrale (3) et au moins une partie à pieds (5) présentant une pluralité prédéfinie d'éléments de pied (4), dans laquelle au moins un élément d'appui (8) est relié à chacun des éléments de pied (4), dans laquelle au moins l'un parmi les éléments de pied (4) est réalisé de telle sorte qu'en cas de charge sur la chaise (1), celle-ci exécute un mouvement d'abaissement à souplesse élastique où au moins un élément d'appui(8) bouge par rapport à une surface d'appui et de ce fait, un point d'appui de la chaise (1), lequel est défini par la position de l'au moins un élément d'appui (8) par rapport à un axe central (11) de la chaise (1), se déplace vers l'extérieur,
    dans laquelle les éléments de pied (4) sont agencés sensiblement en forme d'étoile, et les éléments de pied (4) peuvent sensiblement pivoter individuellement vers le haut et le bas, et
    dans laquelle un deuxième dispositif de ressort (4.11, 9) vient en prise au niveau d'au moins un élément de pied (4) défini,
    dans laquelle des moyens de rappel (4.8, 4.9, 4.10, 4.11, 4.12) sont prévus pour appliquer une force de rappel du deuxième dispositif de ressort (4.11, 9),
    dans laquelle, dans la zone inférieure de l'au moins une partie de pied (3), au niveau de la partie à pieds (5), au moins un dispositif de retenue (4.10-4.12) coopérant avec le deuxième dispositif de ressort (4.11, 9) est réalisé, au niveau duquel au moins l'un des éléments de pied (4) est réceptionné, et
    au niveau d'une extrémité côté pied d'au moins l'un des éléments de pied (4), au moins une fente (16) sensiblement ouverte vers le bas est réalisée, est accrochée au dispositif de retenue (4.10-4.12), et est maintenue en position avec au moins une pièce complémentaire.
EP04764056.0A 2003-08-19 2004-08-12 Chaise a pieds elastiques mobiles pour une assise dynamique Active EP1659902B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10338549A DE10338549A1 (de) 2003-08-19 2003-08-19 Pendelstuhl
PCT/EP2004/009056 WO2005018384A1 (fr) 2003-08-19 2004-08-12 Chaise ou tabouret a pieds elastiques mobiles pour une assise dynamique

Publications (2)

Publication Number Publication Date
EP1659902A1 EP1659902A1 (fr) 2006-05-31
EP1659902B1 true EP1659902B1 (fr) 2019-05-15

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EP04764056.0A Active EP1659902B1 (fr) 2003-08-19 2004-08-12 Chaise a pieds elastiques mobiles pour une assise dynamique

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US (2) US8020938B2 (fr)
EP (1) EP1659902B1 (fr)
JP (1) JP2007502631A (fr)
DE (1) DE10338549A1 (fr)
WO (1) WO2005018384A1 (fr)

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Also Published As

Publication number Publication date
EP1659902A1 (fr) 2006-05-31
US20080106132A1 (en) 2008-05-08
WO2005018384A1 (fr) 2005-03-03
JP2007502631A (ja) 2007-02-15
US8020938B2 (en) 2011-09-20
US20090200845A1 (en) 2009-08-13
DE10338549A1 (de) 2005-03-24

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