EP2721960B1 - Seating furniture, in particular a rotating office chair - Google Patents
Seating furniture, in particular a rotating office chair Download PDFInfo
- Publication number
- EP2721960B1 EP2721960B1 EP13187919.9A EP13187919A EP2721960B1 EP 2721960 B1 EP2721960 B1 EP 2721960B1 EP 13187919 A EP13187919 A EP 13187919A EP 2721960 B1 EP2721960 B1 EP 2721960B1
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- EP
- European Patent Office
- Prior art keywords
- seat
- swivel chair
- bearing element
- office swivel
- chair according
- 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.)
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Images
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
- A47C3/027—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with curved rocking members between seat and base frame
Definitions
- the present invention relates to an office swivel chair.
- the EP 0 920 823 A2 shows a chair with a seat support and a pivotally connected to the seat support seat surface, wherein the seat on its the seat support facing flat side has a rolling cradle and the seat support has a corresponding rolling guide, wherein the rolling cradle and the rolling guide together form a pivoting device.
- the DE102005042811A1 shows another office swivel chair.
- the present invention has the object to provide a seating with a mechanism, ben, which allows an improved operability of the back muscles and the spine.
- an office swivel chair provided with a seat support and a pivotally connected to the seat support seat, wherein the seat on its side facing the seat support flat has a rolling cradle and the seat support has a corresponding rolling guide, the roll cradle and the rolling guide together form a pivoting device, wherein the pivoting device is designed such that the seat surface is pivotable by rolling the Abrollwiege in the rolling guide laterally about a longitudinal axis of the seat.
- the idea underlying the present invention is to provide the main support of the weight of a person sitting on the chair via a pivoting about a longitudinal axis of the chair pivotally mounted on the seat support.
- the pivoting device includes a rolling in a leadership of the seat support rolling cradle.
- the guide is preferably aligned substantially along a transverse axis of the seat and the rolling cradle is configured such that the rolling in the rolling guide leads to the desired pivoting about a longitudinal axis.
- the longitudinal axis preferably passes through the rolling point (or the rolling line) as the instantaneous pole of the rolling cradle. This is in a horizontal position of the seat, so its initial position, preferably in the longitudinal plane of symmetry of the chair. It is also conceivable, however, a design of the rolling guide, which is the instantaneous pole the rolling movement, for example, via an additional deflection, moves to another position.
- the longitudinal axis can also be a set of parallel longitudinal axes, which shifts during the rolling movement with the instantaneous roll-off point or the instantaneous pole.
- the Schaar parallel longitudinal axes is then preferably arranged symmetrically about the starting position.
- the Abrollwiege be flexibly connected in its initial position with the seat support such that a rolling movement is possible to a limited extent, but is damped by the flexible connection. This ensures that the rolling cradle always returns to the starting position without any external force.
- the Abrollwiege may have different curvatures for ergonomic interpretation of the pivoting characteristic of the pivoting device.
- a pivotability about a transverse axis for example in the form of a synchronous mechanism, may be provided, which is preferably provided independently of the pivoting device according to the invention.
- a mobility of a seat in the form of a pivoting or tilting about a longitudinal axis of the chair is possible, thus creating a possibility of movement, which has a defined and thus very good ergonomic interpretable movement.
- the pivoting can be accompanied by the rolling of the Abrollwiege on the rolling surface with a slight transverse movement of the seat, which is similar to sitting on a gymnastic ball of a natural movement of the pelvis and the lower and middle spine.
- the rolling guide on a guide rail for guiding the Abrollwiege in a predetermined path.
- the guide rail is arranged such that a lateral pivoting movement takes place about the longitudinal axis of the seat.
- the rolling movement of the Abrollwiege is guided defined, whereby the pivoting movement takes place in a predetermined manner.
- the rolling cradle is guided by the guide rail in the predetermined path.
- a second roll-off cradle and a second roll-off guide are provided.
- the second rolling cradle and the second rolling guide are each preferably arranged and configured parallel to the first rolling cradle and the first rolling guide.
- the second rolling cradle and the second rolling guide are arranged and designed such that the pivoting movement takes place by the rolling of the two rolling cradles on the rolling guides about the longitudinal axis of the chair.
- the provision of at least one second rolling cradle has the advantage that the two rolling cradles can be arranged at a distance from each other. With such a spacing, each of the two rolling weighers can be made relatively narrow and yet precise guidance of the rolling and weighing simultaneously a high stability of the pivoting device can be achieved.
- the two rolling weights do not necessarily have the same size. Rather, the second Abrollwiege may be provided, for example, with a smaller Abrollradius than the first Abrollwiege. As a result, a pivoting movement is achieved which has a greater pivoting deflection in the region of the first rolling cradle than in the region of the second rolling cradle. This can serve to take into account leverage or physiologically different distances of the human body at certain points.
- the smaller roll-off cradle in the region of the rump and the larger roll-off cradle may be provided in the region of the middle thigh of a person sitting on the chair.
- the roll geometry is thus tunable in a wide range and adaptable to the requirements of the particular field of use of the chair.
- the variant with different roll-off geometries may be preferable because of the seat position tilted backwards.
- the geometry with two equal rolling be cheaper, because here the support to the back only on the rolling surface and therefore the movement characteristics should preferably be homogeneous front and rear of the seat.
- lateral stop elements for laterally limiting the lateral pivoting movement are provided on the seating furniture.
- dampers for damping the lateral pivoting movement prevent hard lateral impact of the seat and thus increase comfort.
- the stop elements and / or the dampers the deflection of the pivoting movement is effectively limited, so that the pivoting movement takes place in an ergonomically meaningful area and prevents a person sitting on the chair loses his balance.
- Dampers are any damping elements to understand, which may also be integrated into any storage or connection of the seat on the seat support.
- a locking device for locking the lateral pivoting device is further provided.
- the pivoting device can be locked and thus eien pivoting of the seat can be blocked.
- the pivoting device can be locked at least in a horizontal position of the seat surface or in the starting position of the seat surface.
- the seat on a seat and a seat cushion.
- the pivoting device contains a conically shaped, flexible bearing element for damping a pivoting movement of the seat relative to the seat support.
- the seat has a correspondingly shaped, conical trough.
- the tub is provided as a trough or depression in the seat.
- the flexible bearing element is arranged such that a pivoting movement of the seat shell is damped by a deformation of the bearing element.
- the conical trough is provided with a passage opening for attaching the flexible bearing element, wherein the bearing element can be fastened by the passage opening by means of a fastening element on the seat support.
- the bearing element is in particular arranged and designed such that the seat surface is damped relative to the seat support about the longitudinal axis of the seat of the bearing element damped.
- the bearing element can be varied and in particular can have a bearing characteristic, that is, a non-linear behavior of its flexibility, which is used for the ergonomic interpretation of the pivoting movement.
- a characteristic can be achieved by a variety of measures, for example by different materials, different damper types (such as air or liquid damper), different dimensions of the damper or by a special design of flexible materials.
- the bearing element acts even at low deflections, in particular by deformation, whereby the characteristic of the pivoting movement for the entire range of motion of the pivoting device can be interpreted.
- the bearing element arranged in this way permits pivoting movements of the chair seat relative to the chair frame about at least one longitudinal axis, that is to say about the sagittal axis of a person sitting on the chair.
- the advantage of this is that according to the invention no pressure loads due to the conventional seating forces in the direction of gravity need to be taken into account in the design of the bearing element, since these are supported by the rolling cradle directly on the seat support.
- the bearing element can be ideally fine tuned to the forces and moments introduced exclusively by the tilting movements of the spine, resulting in a high level of comfort and an optimized mobility of the seat.
- the bearing element for example by a matched to the spine forces progression in the bearing characteristic, be matched for sufficient support and against undesirable larger deflections and yet respond very fine at low deflections.
- the bearing element can be matched largely to the needs of the human spine during pivoting movements of the seat, independently of the weight of the person sitting on the chair.
- the bearing element has a cone section for this purpose. Further, it has a first end portion and a second end portion, wherein the first end portion has a first constant diameter and the second end portion which is opposed to the first end portion has a second constant diameter. The second constant diameter is smaller than the first constant diameter formed.
- the end portions connect to the respective small and large diameter ends of the cone portion.
- the bearing element is designed to be more flexible in the region of the first end section than in the region of the second end section.
- a constant wall thickness is not necessary, but only one possible embodiment.
- the bearing element is designed and designed so that it promotes a flexible deformation of the first end portion in a Verschenkonia and counteracts a deformation of the second end portion.
- the bearing element in an alternative embodiment at the first end have a smaller wall thickness than at the cone portion and / or at the second end.
- the flexibility of the first end portion is increased again.
- grooves, grooves or other recesses may be provided to locally influence the characteristic and / or the flexibility.
- the bearing element has a through hole through which the bearing element can be fixed by means of the fastening element on the seat support.
- the through hole preferably extends along the main axis of the bearing element and does not need along the main axis have constant diameter. Only in one area, preferably the second end section with a smaller diameter, does the through hole have a fastening section with a sectionally constant diameter and a fastening shoulder.
- the fastener could also be a kind of barrel nut and the through hole have a corresponding barrel shape, so that the attachment of the bearing member to the seat support receives additional flexibility or pivoting.
- the bearing element is provided vulcanized on the seat support.
- mounting options other form-locking type are conceivable, such as the clamping of a clamping portion or the like in the seat support.
- the attachment by means of a fastening element which is supplemented in an advantageous embodiment in that at least in the region of the second end portion of the bearing element, a spacer sleeve is provided in the through hole.
- the bearing element contains a rubber bearing component, wherein the spacer sleeve is provided inserted into the rubber bearing component.
- the spacer sleeve is provided vulcanized into the rubber bearing component. The spacer sleeve allows a rigid attachment of the bearing element to the seat support.
- the fastener may be formed as a screw, wherein a corresponding thread is provided in the seat support and the spacer sleeve is formed according to the fastening screw, so that the fastening screw can be inserted through the spacer sleeve and the screw head is supported on the spacer sleeve.
- the spacer sleeve forms a paragraph for the The screw head and the fixing screw can be fastened by tightening with the seat support and the bearing element.
- the pivoting device has at least one second bearing element.
- the at least two bearing elements together form the pivot axis forming the longitudinal axis of the seat.
- This embodiment can be combined both with embodiments with one and with two or more unrolling rolls.
- a separate bearing element for limiting the pivoting movement can be provided for each rolling cradle. This has the advantage that thereby the pivoting characteristic of each Abrollwiege is individually tunable and interpretable.
- the seat carrier is formed integrally with the rolling guide.
- the seat carrier may include aluminum or an aluminum alloy.
- the seat support is formed integrally with the rolling guide made of an aluminum alloy and designed, for example, as a cast part.
- the seat support can also be designed as a stamped and / or pressed part.
- Alternative embodiments have a separate rolling guide, which is attached to the seat support.
- a one-piece design of the rolling guide with the seat support has the advantage that fewer components and fewer manufacturing steps are necessary.
- the seat according to the invention comprise a seat formed integrally with the rolling cradle.
- the seat shell may contain a plastic material.
- the seat shell can thus be advantageously designed as an injection molded part.
- FIG. 1 shows an office swivel chair according to an embodiment of the present invention.
- the office swivel chair 10 is shown in an exploded view, with the individual parts shown in their assembly arrangement, but spaced from each other.
- the office swivel chair 10 has a seat base 11 to which a seat support 2 is attached. Above the seat support 2, a seat surface 3 is shown, which is provided for connection to the seat support 2.
- a pivoting device 4 is not shown in this illustration for clarity.
- the longitudinal axis 8 of the office swivel chair 10 extends longitudinally through the seat carrier 2 or the seat base 11.
- the office swivel chair 10 furthermore has a backrest 12 which can be attached to the seat base 11 on the rear side of the seat surface 3.
- the coupling element 16 of the backrest is designed as a coupling shaft and the coupling element 17 of the seat base as a coupling projection.
- the seat column 13 is connected at its lower end with a chair cross 14, which completes the office swivel chair 10 with its chair rollers 15.
- the present representation of an office chair serves primarily to clarify the arrangement of the seat support 2 and the seat surface 3 and the longitudinal axis 8 on such an office swivel chair 10.
- a description of a pivoting device 4 according to the invention follows with reference to the other figures.
- FIG. 2 shows an inventive seating 1 in a front view.
- the representation of the elements of the chair 1 is shown schematically here to explain their functionality.
- the longitudinal axis 8 runs in this view in the drawing plane into or out of the drawing plane.
- the chair 1 has a seat support 2 and a seat surface 3.
- the seat surface 3 has a rolling cradle 5 on its flat side 6 facing the seat support 2.
- the seat support 2 has a rolling guide 7 correspondingly arranged thereon.
- the rolling cradle 5 and the rolling guide 7 together form a pivoting device. 4
- FIG. 3 will that be in FIG. 2 shown seating furniture shown in a pivoted position.
- the Abrollwiege 5 is rolled within the rolling guide 7 according to the directional arrow shown to the right, so that the seat 3 is now pivoted.
- the Verschwenkwinkel ⁇ to the horizontal and thus the deflection depends on the unwound distance A, by which the Abrollwiege 5 rolls in the rolling guide 7.
- FIG. 4 is the seating of the invention FIG. 2 shown in a side view, wherein the Abrollwiege 5 is executed here like a roller.
- the longitudinal axis 8 runs parallel to the plane of the drawing.
- the rolling cradle 5 runs on a track 9. This is limited by the rolling guide, which is designed in the form of Abrollschienen 7.
- the rolling rails 7 are arranged transversely to the longitudinal direction 8.
- FIG. 5 an alternative embodiment of a seat 1 according to the invention is shown in a side view.
- two roll stands 5 and 5 ' are used instead of a long, roll-like roll cradle as in FIG FIG. 4 intended.
- a cavity can be provided between the two rolling rolls, which cavity can otherwise be used as space.
- FIG. 6 is a plan view of a seat 20 of a chair 1 according to an embodiment of the present invention shown.
- the seat 20 is shown in the assembled state. This means that one of the seat shell 20 hidden seat support 2 is disposed below the seat pan 20. Furthermore, a rolling cradle 5 is provided on the underside 6 of the seat 20, which in FIG. 6 indicated by dashed lines.
- the seat shell 20 has a substantially rectangular shape with rounded corners and a projection 24 which is symmetrically provided on the longitudinal axis 8 in the longitudinal direction protruding. In the region of the projection 24, a bearing element 22 is provided, which is arranged in a conical trough 21.
- the bearing member 22 and the conical trough 21 are described with reference to FIG FIG. 7 explained in more detail.
- FIG. 7 shows a cross-sectional view AA FIG. 6 which extends transversely to the longitudinal axis 8 and through the bearing element 22.
- the seat shell 20 has a conical trough 21 in the sectional plane.
- the conical trough 21 contains a central passage opening 23.
- a bearing element 22, which is fastened to the seat carrier 2, extends through the passage opening 23.
- the bearing element 22 is located in front of a rolling cradle 5.
- the pivoting movement by rolling the Abrollwiege 5 on the web 9 is damped or influenced by the bearing element 22.
- the bearing element 22nd also results in the seat 3 being returned to its initial position, which is essentially horizontal, without the action of force.
- FIGS. 8 and 9 The mobility of this arrangement is in the FIGS. 8 and 9 shown, wherein the seat shell 20 is formed here as part of a seat 3.
- the Abrollwiege 5 and thus the seat 3 is, as indicated by arrows, pivotable to the left and right and rolls during pivoting within the guide rails 7 on the seat support 2 from.
- the rolling movement is elastically damped by a resulting flexible deformation of the bearing element 22.
- the surface contact between the bearing element 22 and the conical trough 21 causes the bearing element 22 deformed in a designated area. This is related to FIG. 10 discussed in more detail.
- FIG. 9 shows a tilted position of the in FIG. 8 Seat 1 shown, wherein the seat surface 3 is pivoted about the longitudinal axis 8.
- the bearing element 22 is doing, as in FIG. 9 schematically indicated, deformed.
- This deformation is an elastic deformation whose resistance, in particular resilient resistance counteracts the pivoting movement.
- an elastic-plastic deformation behavior of the bearing element 22 with a damping effect is conceivable, which is caused for example by hysteresis of a rubber material.
- the bearing element 22, the conical trough 21 and the passage opening 23 are part of the pivoting device 4 in this embodiment.
- the bearing element 22 will now be discussed in more detail below.
- FIG. 10 shows an individual view of the bearing element 22 in a sectional view.
- the bearing element 22 has a cone shape with a cone portion 30 and two end portions 31 and 32.
- the end portions 31 and 32 each have constant diameters D1, D2, with a first diameter D1 of the first end portion 31 being larger than the second diameter D2 of the second end portion 32.
- the inner diameter is thus larger than the inner diameter in the region of the second end portion 32.
- the flexible bearing element 22 is designed such that a lateral force introduction into the bearing element 22 leads to a deformation of the first end portion 31, wherein the second End portion 32 remains substantially undeformed.
- the cone portion 30 represents a buffer or transition area between the two end portions 31, 32.
- the bearing member 22 includes a rubber bearing component 35 and a spacer sleeve 34. Within the spacer sleeve 34, a through hole 33 is provided. The wall thickness of the bearing element 22 is less in the first end portion 31 than in the second end portion 32.
- the spacer sleeve 34 is also formed of a material substantially more rigid than the rubber bearing component 35, in particular of metal.
- the rubber bearing component 35 extends from the first band portion 31 to the second end portion 32.
- the spacer sleeve 34 extends from the cone portion 30 to the second end portion 32.
- relief notches 36 are introduced into the rubber bearing component, which are intended to from a flexible deformation of the the first end portion 31 resulting forces without large stress peaks in the cone section 30 to initiate.
- the bearing element 22 can be fastened to the seat carrier 2 in the region of the spacer sleeve 34 by means of a fastening element 43.
- the fastening element 43 is inserted through the through hole 33 of the spacer sleeve 34 such that it abuts with its head portion, such as a screw head, on a shoulder surface 37 of the spacer sleeve 34 and so a sufficient fastening force on the spacer sleeve 34 and the bearing element on this paragraph 37th can be applied.
- the bearing element 22 can be screwed to the seat support 2 with a cap screw 43.
- FIG. 11 shows a chair 1 according to an embodiment of the present invention in a longitudinal sectional view along the longitudinal axis 8, which here extends through the bearing element 22.
- the seat 1 shown in this embodiment has a seat support 2 and a seat surface 3, wherein the seat surface 3 includes a seat cushion 41 and a seat shell 20.
- On the seat 20 a total of three Abwrwweaberte sections 5, 5 'and 5 "provided, the Abrollwiege 5 takes over the main support, the Abrollwiege 5' provides additional support and the Abrollwiege 5 '' rather a compensating or slightly resilient function to compensate
- the conical trough 21 into which the bearing element 22 is inserted is provided in the seat shell 20.
- a fastening element 43 which is designed as a screw 43 and into a screw-in hole 44
- the fastening element 43 is inserted through the spacer sleeve 34 of the bearing element 22 and is supported by the screw head on the shoulder surface 37 of the spacer sleeve 34.
- the bearing element 22 is fastened to the seat support 2 and flexibly damped with the bearing element the seat 20 so on the seats r 2, that these on the roll-5, 5 ', 5''in a plane extending in the plane or direction in a direction extending from the plane of the drawing in the web 9 are unrolled.
- the seat 3 is pivotable relative to the seat support 2.
- the web 9 of the Abrollwiege 5 is limited by the guide rail 7.
- the pivoting movement is, if desired, blocked by a locking device 42.
- the locking device 42 is positioned such that it causes a lateral support of the seat surface 3 on the seat support 2 and thus prevents pivoting of the seat.
- the locking device 32 is mounted in the illustrated embodiment of the seat pan.
- the locking device 42 is designed here as a pivot lever, wherein the pivot lever 42 in FIG. 11 is shown in an unlocked position. In order to lock the pivoting lever 42, this must be rotated by 180 ° with the aid of an actuating device, so that it is supported on a surface of the seat support 2 and thus restricts or prevents the mobility of the seat shell 20.
- the seat cushion 41 is formed with a cushion support 45 which rests on the seat shell 20.
- the cushion support may alternatively be formed integrally with the seat shell 20.
- the seat cushion 41 is foamed directly onto the seat pan. However, the foaming can then take place only after the assembly of the seat on the seat support.
- the seat shell 20 may extend over the entire seat surface 3.
- FIG. 12 shows a seat support 2 without seat 20 and seat cushion 41, but with a bolted to the seat support 2 bearing element 22.
- the seat 3 is hidden here.
- the seat support 2 has stop elements 51 and 52.
- the seat support 2 has an actuating device 53 for actuating the locking device 42. This is designed here as a pull lever 53, and is operatively connected to the locking lever 42 designed as a locking device 42.
- the rotary lever 42 is rotated, thus locking the seating surface 3, not shown, relative to the seat carrier 2.
- the guide rail 7 and a track 9 are shown, which extend in a transverse direction in the seat support.
- the bearing element 22 is arranged longitudinally offset, which is fastened to the seat support 2 with a fastening means 43 in the form of an Allen screw 43.
- FIG. 13 shows an alternative embodiment of a seat 1 shown schematically in a plan view of the seat 20.
- two bearing elements 22 and 22 'and also two rolling weighers 5 and 5' along the longitudinal axis 8 are arranged.
- the seat support 2 below the seat 20 is located in this embodiment, the seat support 2, not shown, which as in the embodiment of FIG. 5 two rolling guides with guide rails 7, 7 'has.
- the two bearing elements 22 and 22 ' are mounted analogously to the preceding embodiments on the seat support 2.
- a pivoting movement takes place about the longitudinal axis 8 by rolling both rolling cradles 5, 5 'in the rolling guides, being covered by the front Abrollwiege 5 a greater rolling distance A than at the same pivot angle ⁇ at the rear roll cradle 5'.
- a kinematic change of the rolling behavior or the characteristic of the Abrollwiege could be made by a continuous change of height and / or Abrollradius the Abrollwiege.
Description
Die vorliegende Erfindung betrifft einen Bürodrehstuhl.The present invention relates to an office swivel chair.
Die vorliegende Erfindung sowie die ihr zugrunde liegende Problematik wird nachfolgend beispielhaft anhand eines hochlehnigen Bürodrehstuhls, der gemeinhin auch als Chefsessel bezeichnet wird, erläutert.The present invention, as well as the problem underlying it is explained below by way of example with reference to a high-sleeper office swivel chair, which is commonly referred to as a executive chair explained.
Bei modernen Bürodrehstühlen spielt die ergonomische Einstellbarkeit auf unterschiedliche Körpermaße und Körpergewichte eine immer wichtigere Rolle. Diese Einstellbarkeit wird auch als "Personalisierung" bezeichnet. Um diese gewährleisten zu können, sind eine Vielzahl von Verstellmöglichkeiten der Sitzgeometrie aber auch der Bewegungsmechaniken notwendig. Moderne Bürodrehstühle umfassen als Verstellfunktion u.a. die Verstellbarkeit der Höhe, Neigung und Tiefe des Sitzes, der Armelehnenstellung, der Höhe und der Neigung der Rückenlehne. Bewegliche Elemente an Sitzmöbeln können unterschiedlichste Funktionen haben. Vor allem bei Bürodrehstühlen, auf welchen ein Benutzer in der Regel dauerhaft sitzt, wird die Beweglichkeit des Sitzes oder anderer Elemente des Stuhls zur Vorbeugung von Fehlstellungen, Verkrampfungen oder gar Schäden der Wirbelsäule eingesetzt. Das bekannteste Beispiel für bewegliche Elemente eines Bürodrehstuhls ist die so genannte Synchronmechanik. Darunter wird die Kopplung einer Wippmechanik einer Rückenlehne mit der Wippmechanik eines Sitzes verstanden, wobei beide um eine Querachse des Stuhls verschwenkbar sind. Der Nachteil dabei ist, dass für die Wirbelsäule einer auf dem Bürostuhl sitzenden Person lediglich Schwenkbewegungen um eine Querachse des Sitzes, d.h. um die Transversalachse, möglich sind. Für eine ausreichende Bewegung der Wirbelsäule, insbesondere deren Bandscheiben, zur Vorbeugung von Rückenproblemen ist aber auch eine Verschwenkung um eine Längsachse des Sitzes, d.h. um die Sagitalachse einer darauf sitzenden Person, vorteilhaft.In modern office swivel chairs ergonomic adjustability to different body measurements and body weights plays an increasingly important role. This adjustability is also referred to as "personalization". To ensure this, a variety of adjustment of the seat geometry but also the movement mechanics are necessary. Modern office swivel chairs include, among other things, the adjustability of the height, inclination and depth of the seat, the armrest position, the height and the inclination of the backrest. Movable elements of seating furniture can have many different functions. Especially in office swivel chairs, on which a user usually sits permanently, the mobility of the seat or other elements of the chair is used to prevent malpositions, cramps or even damage the spine. The best known example of moving elements of an office swivel chair is the so-called synchronous mechanism. Among them is the coupling of a rocking mechanism of a backrest with the rocking mechanism of a seat understood, both of which are pivotable about a transverse axis of the chair. The disadvantage here is that for the spine of a person sitting on the office chair only pivoting movements about a transverse axis of the seat, ie about the transverse axis, are possible. For a sufficient movement of the spine, in particular the intervertebral discs, for the prevention of back problems but also a pivoting about a longitudinal axis of the seat, that is around the Sagitalachse a person sitting thereon, advantageous.
Eine vergleichbare Problematik wurde bereits in der deutschen Patentanmeldung
Die
Die
Vor diesem Hintergrund liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Sitzmöbel mit einer Mechanik anzugeben, ben, die eine verbesserte Betätigbarkeit der Rückenmuskulatur und der Wirbelsäule ermöglicht.Against this background, the present invention has the object to provide a seating with a mechanism, ben, which allows an improved operability of the back muscles and the spine.
Erfindungsgemäß wird diese Aufgabe durch ein Sitzmöbel mit den Merkmalen des Patentanspruchs 1 gelöst.According to the invention this object is achieved by a chair with the features of
Demgemäß ist ein Bürodrehstuhl, vorgesehen, mit einem Sitzträger und einer mit dem Sitzträger schwenkbar verbundenen Sitzfläche, wobei die Sitzfläche an ihrer dem Sitzträger zugewandten Flachseite eine Abrollwiege aufweist und der Sitzträger eine korrespondierende Abrollführung aufweist, wobei die Abrollwiege und die Abrollführung gemeinsam eine Verschwenkeinrichtung bilden, wobei die Verschwenkeinrichtung derart ausgebildet ist, dass die Sitzfläche durch Abrollen der Abrollwiege in der Abrollführung seitlich um eine Längsachse des Sitzmöbels verschwenkbar ist.Accordingly, an office swivel chair, provided with a seat support and a pivotally connected to the seat support seat, wherein the seat on its side facing the seat support flat has a rolling cradle and the seat support has a corresponding rolling guide, the roll cradle and the rolling guide together form a pivoting device, wherein the pivoting device is designed such that the seat surface is pivotable by rolling the Abrollwiege in the rolling guide laterally about a longitudinal axis of the seat.
Die der vorliegenden Erfindung zugrunde liegende Idee besteht darin, die hauptsächliche Abstützung des Gewichts einer auf dem Sitzmöbel sitzenden Person über eine Verschwenkeinrichtung um eine Längsachse des Sitzmöbels schwenkbar an dem Sitzträger vorzusehen. Die Verschwenkeinrichtung enthält dazu eine sich in einer Führung des Sitzträgers abrollende Abrollwiege. Die Führung ist bevorzugt im Wesentlichen entlang einer Querachse des Sitzmöbels ausgerichtet und die Abrollwiege ist derart ausgestaltet, dass das Abrollen in der Abrollführung zur gewünschten Verschwenkung um eine Längsachse führt. Die Längsachse verläuft bevorzugt durch den Abrollpunkt (bzw. die Abrolllinie) als Momentanpol der Abrollwiege. Dieser liegt bei einer horizontalen Stellung der Sitzfläche, also ihrer Ausgangsstellung, bevorzugt in der Längs-Symmetrieebene des Sitzmöbels. Denkbar ist jedoch auch eine Gestaltung der Abrollführung, welche den Momentanpol der Abrollbewegung, beispielsweise über eine zusätzliche Umlenkung, an eine andere Position verschiebt.The idea underlying the present invention is to provide the main support of the weight of a person sitting on the chair via a pivoting about a longitudinal axis of the chair pivotally mounted on the seat support. The pivoting device includes a rolling in a leadership of the seat support rolling cradle. The guide is preferably aligned substantially along a transverse axis of the seat and the rolling cradle is configured such that the rolling in the rolling guide leads to the desired pivoting about a longitudinal axis. The longitudinal axis preferably passes through the rolling point (or the rolling line) as the instantaneous pole of the rolling cradle. This is in a horizontal position of the seat, so its initial position, preferably in the longitudinal plane of symmetry of the chair. It is also conceivable, however, a design of the rolling guide, which is the instantaneous pole the rolling movement, for example, via an additional deflection, moves to another position.
Bei der Längsachse kann es sich auch um eine Schaar paralleler Längsachsen handeln, welche sich bei der Abrollbewegung mit dem momentanen Abrollpunkt bzw. dem Momentanpol verschiebt. Die Schaar paralleler Längsachsen ist dann bevorzugt symmetrisch um die Ausgangsstellung angeordnet.The longitudinal axis can also be a set of parallel longitudinal axes, which shifts during the rolling movement with the instantaneous roll-off point or the instantaneous pole. The Schaar parallel longitudinal axes is then preferably arranged symmetrically about the starting position.
Ferner kann die Abrollwiege in ihrer Ausgangsstellung flexibel mit dem Sitzträger derart verbunden sein, dass eine Abrollbewegung in beschränktem Maße möglich ist, jedoch von der flexiblen Verbindung gedämpft wird. Somit ist sichergestellt, dass die Abrollwiege ohne Krafteinwirkung von außen stets in die Ausgangsstellung zurückkehrt.Furthermore, the Abrollwiege be flexibly connected in its initial position with the seat support such that a rolling movement is possible to a limited extent, but is damped by the flexible connection. This ensures that the rolling cradle always returns to the starting position without any external force.
Die Abrollwiege kann unterschiedliche Krümmungen zur ergonomischen Auslegung der Verschwenkcharakteristik der Verschwenkeinrichtung aufweisen.The Abrollwiege may have different curvatures for ergonomic interpretation of the pivoting characteristic of the pivoting device.
Zusätzlich kann auch eine Verschwenkbarkeit um eine Querachse, beispielsweise in Form einer Synchronmechanik, vorgesehen sein, welche bevorzugt unabhängig von der erfindungsgemäßen Verschwenkeinrichtung vorgesehen ist.In addition, a pivotability about a transverse axis, for example in the form of a synchronous mechanism, may be provided, which is preferably provided independently of the pivoting device according to the invention.
Mit dem erfindungsgemäßen Sitzmöbel wird eine Beweglichkeit einer Sitzfläche in Form einer Verschwenkung oder Verkippung um eine Längsachse des Sitzmöbels ermöglicht und so eine Bewegungsmöglichkeit geschaffen, die einen definierten und somit sehr gut ergonomisch auslegbaren Bewegungsablauf aufweist. Ferner kann die Verschwenkung durch das Abrollen der Abrollwiege auf der Abrollfläche auch mit einer leichten Querbewegung der Sitzfläche einhergehen, was ähnlich wie beim Sitzen auf einem Gymnastikball einer natürlichen Bewegung des Beckens und der unteren und mittleren Wirbelsäule entgegen kommt.With the seating furniture according to the invention a mobility of a seat in the form of a pivoting or tilting about a longitudinal axis of the chair is possible, thus creating a possibility of movement, which has a defined and thus very good ergonomic interpretable movement. Furthermore, the pivoting can be accompanied by the rolling of the Abrollwiege on the rolling surface with a slight transverse movement of the seat, which is similar to sitting on a gymnastic ball of a natural movement of the pelvis and the lower and middle spine.
Vorteilhafte Ausgestaltungen und Weiterbildungen ergeben sich aus den weiteren Unteransprüchen sowie aus der Beschreibung unter Bezugnahme auf die Figuren der Zeichnung.Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.
Gemäß einer vorteilhaften Ausführungsform weist die Abrollführung eine Führungsschiene zum Führen der Abrollwiege in einer vorbestimmten Bahn auf. Die Führungsschiene ist dabei derart angeordnet, dass eine seitliche Verschwenkbewegung um die Längsachse des Sitzmöbels erfolgt. Mit einer solchen Führungsschiene wird die Abrollbewegung der Abrollwiege definiert geführt, wodurch die Verschwenkbewegung in einer vorbestimmten Weise erfolgt. Die Abrollwiege ist durch die Führungsschiene in der vorbestimmten Bahn geführt. Dies ist vorteilhaft, weil so die Verschwenkbewegung ergonomisch ausgelegt werden kann. Ferner wird durch die Führungsschiene auch eine Fehlfunktion, wie beispielsweise ein Herausspringen der Abrollwiege aus der Abrollführung, verhindert.According to an advantageous embodiment, the rolling guide on a guide rail for guiding the Abrollwiege in a predetermined path. The guide rail is arranged such that a lateral pivoting movement takes place about the longitudinal axis of the seat. With such a guide rail, the rolling movement of the Abrollwiege is guided defined, whereby the pivoting movement takes place in a predetermined manner. The rolling cradle is guided by the guide rail in the predetermined path. This is advantageous because so the pivoting movement can be designed ergonomically. Furthermore, a malfunction, such as jumping out of the Abrollwiege from the rolling guide prevented by the guide rail.
Gemäß einer vorteilhaften Ausführungsform sind eine zweite Abrollwiege und eine zweite Abrollführung vorgesehen. Die zweite Abrollwiege und die zweite Abrollführung sind jeweils bevorzugt parallel zur ersten Abrollwiege und ersten Abrollführung angeordnet und ausgebildet. Somit sind die zweite Abrollwiege und die zweite Abrollführung derart angeordnet und ausgebildet, dass die Verschwenkbewegung durch das Abrollen der beiden Abrollwiegen auf den Abrollführungen um die Längsachse des Sitzmöbels erfolgt. Das Vorsehen zumindest einer zweiten Abrollwiege hat den Vorteil, dass die beiden Abrollwiegen beabstandet voneinander angeordnet werden können. Mit einer solchen Beabstandung kann jede der beiden Abrollwiegen relativ schmal ausgeführt sein und dennoch eine präzise Führung der Abrollwiegen und gleichzeitig eine hohe Stabilität der Verschwenkeinrichtung erreicht werden. Die beiden Abrollwiegen müssen dabei nicht notwendigerweise dieselbe Größe aufweisen. Vielmehr kann die zweite Abrollwiege beispielsweise mit einem kleineren Abrollradius vorgesehen sein als die erste Abrollwiege. Dadurch wird eine Verschwenkbewegung erreicht, welche im Bereich der ersten Abrollwiege einen größeren Verschwenkausschlag aufweist, als im Bereich der zweiten Abrollwiege. Dies kann dazu dienen, um Hebelwirkungen bzw. physiologisch unterschiedlich große Abstände des menschlichen Körpers an bestimmten Stellen zu berücksichtigen. Beispielsweise können die kleinere Abrollwiege im Bereich des Steißes und die größere Abrollwiege im Bereich der mittleren Oberschenkel einer auf dem Sitzmöbel sitzenden Person vorgesehen sein. Insgesamt ist die Abrollwiegengeometrie somit in einem breiten Spektrum abstimmbar und an die Anforderungen des jeweiligen Einsatzgebietes des Sitzmöbels anpassbar. Beispielsweise kann bei einem Sitzmöbel mit Rückenlehne aufgrund der nach hinten geneigten Sitzposition die Variante mit unterschiedlichen Abrollwiegengeometrien zu bevorzugen sein. Andererseits kann an einem Sitzmöbel mit nur einer geringen Rückenunterstützung oder ohne Rückenlehne die Geometrie mit zwei gleichen Abrollwiegen günstiger sein, weil hier die Abstützung zur Rückseite lediglich über die Abrollfläche erfolgt und daher die Bewegungscharakteristik vorne und hinten an der Sitzfläche bevorzugt homogen sein sollte.According to an advantageous embodiment, a second roll-off cradle and a second roll-off guide are provided. The second rolling cradle and the second rolling guide are each preferably arranged and configured parallel to the first rolling cradle and the first rolling guide. Thus, the second rolling cradle and the second rolling guide are arranged and designed such that the pivoting movement takes place by the rolling of the two rolling cradles on the rolling guides about the longitudinal axis of the chair. The provision of at least one second rolling cradle has the advantage that the two rolling cradles can be arranged at a distance from each other. With such a spacing, each of the two rolling weighers can be made relatively narrow and yet precise guidance of the rolling and weighing simultaneously a high stability of the pivoting device can be achieved. The two rolling weights do not necessarily have the same size. Rather, the second Abrollwiege may be provided, for example, with a smaller Abrollradius than the first Abrollwiege. As a result, a pivoting movement is achieved which has a greater pivoting deflection in the region of the first rolling cradle than in the region of the second rolling cradle. This can serve to take into account leverage or physiologically different distances of the human body at certain points. For example, the smaller roll-off cradle in the region of the rump and the larger roll-off cradle may be provided in the region of the middle thigh of a person sitting on the chair. Overall, the roll geometry is thus tunable in a wide range and adaptable to the requirements of the particular field of use of the chair. For example, in the case of a seat with backrest, the variant with different roll-off geometries may be preferable because of the seat position tilted backwards. On the other hand, in a chair with only a slight back support or without backrest, the geometry with two equal rolling be cheaper, because here the support to the back only on the rolling surface and therefore the movement characteristics should preferably be homogeneous front and rear of the seat.
Gemäß einer bevorzugten Ausführungsform sind an dem Sitzmöbel seitliche Anschlagelemente zum seitlichen Begrenzen der seitlichen Verschwenkbewegung vorgesehen. Alternativ oder zusätzlich können auch Dämpfer zum Dämpfen der seitlichen Verschwenkbewegung vorgesehen sein. Die Dämpfer vermeiden hartes seitliches Anschlagen der Sitzfläche und erhöhen so den Komfort. Mit den Anschlagelementen und/oder den Dämpfern wird die Auslenkung der Verschwenkbewegung wirksam begrenzt, so dass die Verschwenkbewegung in einem ergonomisch sinnvollen Bereich erfolgt und verhindert wird, dass eine auf dem Sitzmöbel sitzende Person das Gleichgewicht verliert. Als Dämpfer sind jegliche dämpfenden Elemente zu verstehen, welche auch in eine etwaige Lagerung oder Verbindung der Sitzfläche am Sitzträger integriert sein können.According to a preferred embodiment, lateral stop elements for laterally limiting the lateral pivoting movement are provided on the seating furniture. Alternatively or additionally, it is also possible to provide dampers for damping the lateral pivoting movement. The dampers prevent hard lateral impact of the seat and thus increase comfort. With the stop elements and / or the dampers, the deflection of the pivoting movement is effectively limited, so that the pivoting movement takes place in an ergonomically meaningful area and prevents a person sitting on the chair loses his balance. Dampers are any damping elements to understand, which may also be integrated into any storage or connection of the seat on the seat support.
In einer vorteilhaften Ausführungsform ist ferner eine Arretiereinrichtung zum Arretieren der seitlichen Verschwenkeinrichtung vorgesehen. Somit kann, falls eine Verschwenkbarkeit nicht gewünscht ist oder vorübergehend nicht sinnvoll ist, die Verschwenkeinrichtung arretiert werden und somit eien Verschwenkung der Sitzfläche blockiert werden. Vorzugsweise ist die Verschwenkeinrichtung zumindest in einer horizontalen Stellung der Sitzfläche bzw. in der Ausgangsstellung der Sitzfläche arretierbar.In an advantageous embodiment, a locking device for locking the lateral pivoting device is further provided. Thus, if a pivoting is not desired or temporarily not useful, the pivoting device can be locked and thus eien pivoting of the seat can be blocked. Preferably, the pivoting device can be locked at least in a horizontal position of the seat surface or in the starting position of the seat surface.
Gemäß einer bevorzugten Ausführungsform weist die Sitzfläche eine Sitzschale und ein Sitzpolster auf. Die Verschwenkeinrichtung enthält dabei ein konisch geformtes, flexibles Lagerelement zum Dämpfen einer Verschwenkbewegung der Sitzfläche gegenüber dem Sitzträger. Die Sitzschale weist eine dazu korrespondierend geformte, konische Wanne auf. Die Wanne ist dabei als Mulde oder Vertiefung in der Sitzschale vorgesehen. Das flexible Lagerelement ist dabei derart angeordnet, dass eine Verschwenkbewegung der Sitzschale durch eine Verformung des Lagerelements gedämpft wird. Bevorzugt ist zum Anbringen des flexiblen Lagerelements die konische Wanne mit einer Durchgangsöffnung versehen, wobei das Lagerelement durch die Durchgangsöffnung mittels eines Befestigungselements an dem Sitzträger befestigbar ist. Das Lagerelement ist dabei insbesondere derart angeordnet und ausgebildet, dass die Sitzfläche relativ zu dem Sitzträger um die Längsachse des Sitzmöbels von dem Lagerelement gedämpft verschwenkbar ist. Das Lagerelement kann vielfältig ausgebildet sein und kann insbesondere eine Lagercharakteristik, das heißt ein nicht-lineares Verhalten seiner Flexibilität aufweisen, was zur ergonomischen Auslegung der Verschwenkbewegung dient. Eine solche Charakteristik kann durch vielerlei Maßnahmen erreicht werden, beispielsweise durch verschiedene Materialien, unterschiedliche Dämpferarten (wie zum Beispiel Luft oder Flüssigkeitsdämpfer), unterschiedliche Dimensionierungen der Dämpfer oder auch durch eine spezielle Formgebung flexibler Materialien. Insbesondere wirkt das Lagerelement schon bei geringen Auslenkungen, insbesondere durch Verformung, wodurch die Charakteristik der Verschwenkbewegung für den gesamten Bewegungsraum der Verschwenkeinrichtung auslegbar ist. Das so angeordnete Lagerelement ermöglicht Verschwenkbewegungen des Stuhlsitzes relativ zum Stuhlgestell um zumindest eine Längsachse, das heißt um die Sagitalachse einer auf dem Stuhl sitzenden Person. Der Vorteil dabei besteht darin, dass erfindungsgemäß bei der Auslegung des Lagerelements keinerlei Druckbelastungen durch die herkömmlichen Sitzkräfte in Gravitationsrichtung berücksichtigt werden brauchen, denn diese stützen sich über die Abrollwiege direkt auf dem Sitzträger ab. Somit kann das Lagerelement ideal auf die ausschließlich durch die Kippbewegungen der Wirbelsäule eingebrachten Kräfte und Momente fein abgestimmt werden, was zu einem hohen Sitzkomfort und einer optimierten Beweglichkeit der Sitzfläche führt. Ferner kann gleichzeitig das Lagerelement, beispielsweise durch eine an die Wirbelsäulenkräfte angepasste Progression in der Lagercharakteristik, für ausreichenden Halt und entgegen unerwünschten größeren Auslenkungen abgestimmt werden und dennoch bei geringen Auslenkungen sehr fein ansprechen. Anders formuliert kann erfindungsgemäß das Lagerelement weitestgehend unabhängig von dem Gewicht der auf dem Stuhl sitzenden Person auf die Bedürfnisse der menschlichen Wirbelsäule bei Verschwenkbewegungen der Sitzfläche abgestimmt werden.According to a preferred embodiment, the seat on a seat and a seat cushion. The pivoting device contains a conically shaped, flexible bearing element for damping a pivoting movement of the seat relative to the seat support. The seat has a correspondingly shaped, conical trough. The tub is provided as a trough or depression in the seat. The flexible bearing element is arranged such that a pivoting movement of the seat shell is damped by a deformation of the bearing element. Preferably, the conical trough is provided with a passage opening for attaching the flexible bearing element, wherein the bearing element can be fastened by the passage opening by means of a fastening element on the seat support. The bearing element is in particular arranged and designed such that the seat surface is damped relative to the seat support about the longitudinal axis of the seat of the bearing element damped. The bearing element can be varied and in particular can have a bearing characteristic, that is, a non-linear behavior of its flexibility, which is used for the ergonomic interpretation of the pivoting movement. Such a characteristic can be achieved by a variety of measures, for example by different materials, different damper types (such as air or liquid damper), different dimensions of the damper or by a special design of flexible materials. In particular, the bearing element acts even at low deflections, in particular by deformation, whereby the characteristic of the pivoting movement for the entire range of motion of the pivoting device can be interpreted. The bearing element arranged in this way permits pivoting movements of the chair seat relative to the chair frame about at least one longitudinal axis, that is to say about the sagittal axis of a person sitting on the chair. The advantage of this is that according to the invention no pressure loads due to the conventional seating forces in the direction of gravity need to be taken into account in the design of the bearing element, since these are supported by the rolling cradle directly on the seat support. Thus, the bearing element can be ideally fine tuned to the forces and moments introduced exclusively by the tilting movements of the spine, resulting in a high level of comfort and an optimized mobility of the seat. Furthermore, at the same time the bearing element, for example by a matched to the spine forces progression in the bearing characteristic, be matched for sufficient support and against undesirable larger deflections and yet respond very fine at low deflections. In other words, according to the invention, the bearing element can be matched largely to the needs of the human spine during pivoting movements of the seat, independently of the weight of the person sitting on the chair.
Gemäß einer bevorzugten Ausführungsform weist das Lagerelement dazu einen Konusabschnitt auf. Ferner weist es einen ersten Endabschnitt und einen zweiten Endabschnitt auf, wobei der erste Endabschnitt einen ersten konstanten Durchmesser und der zweite Endabschnitt, welcher dem ersten Endabschnitt gegenüberliegend angeordnet ist, einen zweiten konstanten Durchmesser auf. Der zweite konstante Durchmesser ist dabei kleiner als der erste konstante Durchmesser ausgebildet. Die Endabschnitte schließen an die jeweiligen Enden mit kleinem und großem Durchmesser des Konusabschnitts an. Im Falle konstanter Wandstärken ist das Lagerelement im Bereich des ersten Endabschnitts flexibler ausgebildet als im Bereich des zweiten Endabschnitts. Eine konstante Wandstärke ist jedoch nicht notwendig, sondern lediglich eine mögliche Ausführung.According to a preferred embodiment, the bearing element has a cone section for this purpose. Further, it has a first end portion and a second end portion, wherein the first end portion has a first constant diameter and the second end portion which is opposed to the first end portion has a second constant diameter. The second constant diameter is smaller than the first constant diameter formed. The end portions connect to the respective small and large diameter ends of the cone portion. In the case of constant wall thicknesses, the bearing element is designed to be more flexible in the region of the first end section than in the region of the second end section. A constant wall thickness is not necessary, but only one possible embodiment.
Bevorzugt ist das Lagerelement derart ausgebildet und ausgelegt, dass es bei einer Verschenkbewegung eine flexible Verformung des ersten Endabschnitts begünstigt und einer Verformung des zweiten Endabschnitts entgegenwirkt.Preferably, the bearing element is designed and designed so that it promotes a flexible deformation of the first end portion in a Verschenkbewegung and counteracts a deformation of the second end portion.
Abweichend von der Ausführungsform mit konstanter Wandstärke kann das Lagerelement in einer alternativen Ausführungsform am ersten Ende eine geringere Wandstärke aufweisen als am Konusabschnitt und/oder am zweiten Ende. Dadurch wird die Flexibilität des ersten Endabschnittes nochmals erhöht. Ferner können Rillen, Nuten oder andere Ausnehmungen vorgesehen sein, um die Charakteristik und/oder die Flexibilität lokal zu beeinflussen.Deviating from the embodiment with a constant wall thickness, the bearing element in an alternative embodiment at the first end have a smaller wall thickness than at the cone portion and / or at the second end. As a result, the flexibility of the first end portion is increased again. Furthermore, grooves, grooves or other recesses may be provided to locally influence the characteristic and / or the flexibility.
Vorteilhaft weist das Lagerelement ein Durchgangsloch auf, durch welches das Lagerelement mittels des Befestigungselements an dem Sitzträger festlegbar ist. Das Durchgangsloch erstreckt sich bevorzugt entlang der Hauptachse des Lagerelements und braucht dabei entlang der Hauptachse keinen konstanten Durchmesser aufzuweisen. Lediglich in einem Bereich, bevorzugt dem zweiten Endabschnitt mit geringerem Durchmesser, weist das Durchgangsloch einen Befestigungsabschnitt mit einem abschnittsweise konstanten Durchmesser und einem Befestigungsabsatz auf. Es sind auch alternative Ausführungen des Durchgangsloches denkbar. Beispielsweise könnte das Befestigungselement auch eine Art Tonnenmutter sein und das Durchgangsloch eine korrespondierende Tonnenform aufweisen, so dass die Befestigung des Lagerelements an dem Sitzträger eine zusätzliche Flexibilität bzw. Verschwenkbarkeit erhält. Als Alternative zu der Befestigung des Lagerelements mit einem Befestigungselement durch das Durchgangsloch ist auch denkbar, dass das Lagerelement an dem Sitzträger anvulkanisiert vorgesehen ist. Ferner sind auch Befestigungsmöglichkeiten anderer formschlüssiger Art denkbar, wie beispielsweise das Einklemmen eines Klemmabschnitts oder dergleichen im Sitzträger.Advantageously, the bearing element has a through hole through which the bearing element can be fixed by means of the fastening element on the seat support. The through hole preferably extends along the main axis of the bearing element and does not need along the main axis have constant diameter. Only in one area, preferably the second end section with a smaller diameter, does the through hole have a fastening section with a sectionally constant diameter and a fastening shoulder. There are also alternative versions of the through hole conceivable. For example, the fastener could also be a kind of barrel nut and the through hole have a corresponding barrel shape, so that the attachment of the bearing member to the seat support receives additional flexibility or pivoting. As an alternative to the attachment of the bearing element with a fastener through the through hole is also conceivable that the bearing element is provided vulcanized on the seat support. Furthermore, mounting options other form-locking type are conceivable, such as the clamping of a clamping portion or the like in the seat support.
Bevorzugt ist jedoch die Befestigung mittels eines Befestigungselementes, welche bei einer vorteilhaften Ausführungsform dadurch ergänzt wird, dass zumindest im Bereich des zweiten Endabschnitts des Lagerelements eine Distanzhülse im Durchgangsloch vorgesehen ist. Das Lagerelement enthält dabei eine Gummilagerkomponente, wobei die Distanzhülse in die Gummilagerkomponente eingesetzt vorgesehen ist. Bevorzugt ist die Distanzhülse in die Gummilagerkomponente einvulkanisiert vorgesehen. Die Distanzhülse ermöglicht eine steife Befestigung des Lagerelements an dem Sitzträger. Beispielsweise kann das Befestigungselement als Schraube ausgebildet sein, wobei im Sitzträger ein korrespondierendes Gewinde vorgesehen ist und die Distanzhülse entsprechend der Befestigungsschraube ausgebildet ist, so dass die Befestigungsschraube durch die Distanzhülse hindurch gesteckt werden kann und sich der Schraubenkopf an der Distanzhülse abstützt. Somit bildet die Distanzhülse einen Absatz für den Schraubenkopf und die Befestigungsschraube kann durch Festziehen mit dem Sitzträger und dem Lagerelement befestigt werden.Preferably, however, the attachment by means of a fastening element, which is supplemented in an advantageous embodiment in that at least in the region of the second end portion of the bearing element, a spacer sleeve is provided in the through hole. The bearing element contains a rubber bearing component, wherein the spacer sleeve is provided inserted into the rubber bearing component. Preferably, the spacer sleeve is provided vulcanized into the rubber bearing component. The spacer sleeve allows a rigid attachment of the bearing element to the seat support. For example, the fastener may be formed as a screw, wherein a corresponding thread is provided in the seat support and the spacer sleeve is formed according to the fastening screw, so that the fastening screw can be inserted through the spacer sleeve and the screw head is supported on the spacer sleeve. Thus, the spacer sleeve forms a paragraph for the The screw head and the fixing screw can be fastened by tightening with the seat support and the bearing element.
Bei einer alternativen Ausführungsform eines erfindungsgemäßen Sitzmöbels weist die Verschwenkeinrichtung zumindest ein zweites Lagerelement auf. In diesem Fall bilden die zumindest zwei Lagerelement gemeinsam die die Längsachse des Sitzmöbels bildende Schwenkachse. Diese Ausführungsform ist sowohl mit Ausführungsformen mit einer als auch mit zwei oder mehreren Abrollwiegen kombinierbar. Somit kann beispielsweise im Falle zweier Abrollwiegen für jede Abrollwiege ein eigenes Lagerelement zum Begrenzen der Verschwenkbewegung vorgesehen sein. Dies hat den Vorteil, dass dadurch die Verschwenkcharakteristik jeder Abrollwiege einzeln abstimmbar und auslegbar ist.In an alternative embodiment of a seat according to the invention, the pivoting device has at least one second bearing element. In this case, the at least two bearing elements together form the pivot axis forming the longitudinal axis of the seat. This embodiment can be combined both with embodiments with one and with two or more unrolling rolls. Thus, for example, in the case of two rolling weighers, a separate bearing element for limiting the pivoting movement can be provided for each rolling cradle. This has the advantage that thereby the pivoting characteristic of each Abrollwiege is individually tunable and interpretable.
Bei einer Ausführungsform des erfindungsgemäßen Sitzmöbels ist der Sitzträger einteilig mit der Abrollführung ausgebildet. Ferner kann der Sitzträger Aluminium oder eine Aluminiumlegierung enthalten. Bevorzugt ist der Sitzträger einteilig mit der Abrollführung aus einer Aluminiumlegierung ausgebildet und beispielsweise als Gussteil ausgeführt. Alternativ kann der Sitzträger auch als Stanz- und/oder Pressteil ausgeführt sein. Alternative Ausführungsformen weisen eine separate Abrollführung auf, welche an dem Sitzträger angebracht ist. Eine einteilige Ausbildung der Abrollführung mit dem Sitzträger hat jedoch den Vorteil, dass weniger Bauteile und weniger Herstellungsschritte notwendig sind.In one embodiment of the seat according to the invention, the seat carrier is formed integrally with the rolling guide. Further, the seat carrier may include aluminum or an aluminum alloy. Preferably, the seat support is formed integrally with the rolling guide made of an aluminum alloy and designed, for example, as a cast part. Alternatively, the seat support can also be designed as a stamped and / or pressed part. Alternative embodiments have a separate rolling guide, which is attached to the seat support. However, a one-piece design of the rolling guide with the seat support has the advantage that fewer components and fewer manufacturing steps are necessary.
Weitere Ausführungsformen des erfindungsgemäßen Sitzmöbels weisen eine einteilig mit der Abrollwiege ausgebildete Sitzschale auf. Alternativ oder zusätzlich kann die Sitzschale ein Kunststoffmaterial enthalten. Die Sitzschale kann somit vorteilhaft als Spritzgussteil ausgebildet sein.Further embodiments of the seat according to the invention comprise a seat formed integrally with the rolling cradle. Alternatively or additionally, the seat shell may contain a plastic material. The seat shell can thus be advantageously designed as an injection molded part.
Die obigen Ausgestaltungen und Weiterbildungen lassen sich, sofern sinnvoll, beliebig miteinander kombinieren. Weitere mögliche Ausgestaltungen, Weiterbildungen und Implementierungen der Erfindung umfassen auch nicht explizit genannte Kombinationen von zuvor oder im Folgenden bezüglich der Ausführungsbeispiele beschriebenen Merkmale der Erfindung. Insbesondere wird dabei der Fachmann auch Einzelaspekte als Verbesserungen oder Ergänzungen zu der jeweiligen Grundform der vorliegenden Erfindung hinzufügen.The above embodiments and developments can, if appropriate, combine with each other as desired. Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.
Die vorliegende Erfindung wird nachfolgend anhand der in den schematischen Figuren der Zeichnung angegebenen Ausführungsbeispiele näher erläutert. Es zeigen dabei:
- Fig. 1
- einen Bürodrehstuhl gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;
- Fig. 2
- eine schematische Vorderansicht eines Sitzmöbels in einer Ausgangsstellung;
- Fig. 3
- Eine Vorderansicht des Sitzmöbels aus
Fig. 2 in einer verschwenkten Stellung; - Fig. 4
- das Sitzmöbel aus
Fig. 2 in einer Seitenansicht; - Fig. 5
- eine Seitenansicht einer Ausführungsform des erfindungsgemäßen Sitzmöbels;
- Fig. 6
- eine Draufsicht auf eine Sitzschale im auf einem Sitzträger montierten Zustand;
- Fig. 7
- eine Schnittansicht eines Querschnittes einer Sitzschale aus
Fig. 6 ; - Fig. 8, 9
- eine schematische Darstellung einer Verschwenkbewegung einer Sitzschale gemäß
Fig. 7 , welche mit einem Sitzpolster versehen ist; - Fig. 10
- eine Schnittansicht einer Einzeldarstellung eines Lagerelements;
- Fig. 11
- eine Längsschnittansicht durch ein erfindungsgemäßes Sitzmöbel entlang der Längsachse;
- Fig. 12
- eine perspektivische Ansicht eines Sitzmöbels ohen Sitzfläche;
- Fig. 13
- eine schematische Darstellung einer alternativen Ausführungsform einer Sitzmöbels in einer Draufsicht.
- Fig. 1
- an office swivel chair according to an embodiment of the present invention;
- Fig. 2
- a schematic front view of a chair in a starting position;
- Fig. 3
- A front view of the chair
Fig. 2 in a pivoted position; - Fig. 4
- the seating
Fig. 2 in a side view; - Fig. 5
- a side view of an embodiment of the seat according to the invention;
- Fig. 6
- a plan view of a seat in the mounted on a seat support state;
- Fig. 7
- a sectional view of a cross section of a seat
Fig. 6 ; - Fig. 8, 9
- a schematic representation of a pivoting movement of a seat according to
Fig. 7 which is provided with a seat cushion; - Fig. 10
- a sectional view of an individual representation of a bearing element;
- Fig. 11
- a longitudinal sectional view through an inventive seating along the longitudinal axis;
- Fig. 12
- a perspective view of a chair ohen seat;
- Fig. 13
- a schematic representation of an alternative embodiment of a chair in a plan view.
Die beiliegenden Figuren der Zeichnung sollen ein weiteres Verständnis der Ausführungsformen der Erfindung vermitteln. Sie veranschaulichen Ausführungsformen und dienen im Zusammenhang mit der Beschreibung der Erklärung von Prinzipien und Konzepten der Erfindung. Andere Ausführungsformen und viele der genannten Vorteile ergeben sich im Hinblick auf die Zeichnungen. Die Elemente der Zeichnungen sind nicht notwendigerweise maßstabsgetreu zueinander gezeigt.The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.
In den Figuren der Zeichnung sind gleiche, funktionsgleiche und gleich wirkende Elemente, Merkmale und Komponenten - sofern nichts Anderes ausgeführt ist - jeweils mit denselben Bezugszeichen versehen.In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.
In
In
In
In
Die Beweglichkeit dieser Anordnung wird in den
Im Bereich des ersten Endabschnitts 31 ist der Innendurchmesser folglich größer ist als der Innendurchmesser im Bereich des zweiten Endabschnitts 32. Das flexible Lagerelement 22 ist derart ausgebildet, dass eine seitliche Krafteinleitung in das Lagerelement 22 zu einer Verformung des ersten Endabschnittes 31 führt, wobei der zweite Endabschnitt 32 im Wesentlichen unverformt bleibt. Der Konusabschnitt 30 stellt einen Puffer- oder Übergangsbereich zwischen den zwei Endbereichen 31, 32 dar. In der vorliegenden Ausführungsform enthält das Lagerelement 22 eine Gummilagerkomponente 35 sowie eine Distanzhülse 34. Innerhalb der Distanzhülse 34 ist ein Durchgangsloch 33 vorgesehen. Die Wandstärke des Lagerelements 22 ist im ersten Endabschnitt 31 geringer als im zweiten Endabschnitt 32. Ferner ist die Distanzhülse 34 auch aus einem wesentlich steiferen Material als die Gummilagerkomponente 35, insbesondere aus Metall gebildet. Die Gummilagerkomponente 35 erstreckt sich vom ersten Bandabschnitt 31 bis zum zweiten Endabschnitt 32. Die Distanzhülse 34 erstreckt sich vom Konusabschnitt 30 bis zum zweiten Endabschnitt 32. Im Konusabschnitt 30 sind Entlastungskerben 36 in die Gummilagerkomponente eingebracht, welche dazu vorgesehen sind, aus einer flexiblen Verformung des ersten Endabschnitts 31 resultierende Kräfte ohne große Spannungsspitzen in den Konusabschnitt 30 einzuleiten. Das Lagerelement 22 ist im Bereich der Distanzhülse 34 mittels eines Befestigungselements 43 an dem Sitzträger 2 befestigbar. Dazu wird das Befestigungselement 43 durch das Durchgangsloch 33 der Distanzhülse 34 derart hindurch gesteckt, dass es mit seinem Kopfabschnitt, beispielsweise einem Schraubenkopf, an einer Absatzfläche 37 der Distanzhülse 34 anschlägt und so eine ausreichende Befestigungskraft auf die Distanzhülse 34 und das Lagerelement an diesem Absatz 37 aufbringbar ist. Beispielsweise kann das Lagerelement 22 so an den Sitzträger 2 mit einer Kopfschraube 43 angeschraubt werden.In the region of the first end portion 31, the inner diameter is thus larger than the inner diameter in the region of the second end portion 32. The
Die Verschwenkbewegung ist, falls gewünscht, von einer Arretiereinrichtung 42 blockierbar. Dazu wird die die Arretiereinrichtung 42 derart positioniert, dass sie eine seitliche Abstützung der Sitzfläche 3 am Sitzträger 2 bewirkt und so ein Verschwenken der Sitzfläche verhindert. Die Arretiereinrichtung 32 ist in der dargestellten Ausführungsform an der Sitzschale angebracht. Die Arretiereinrichtung 42 ist hier als Schwenkhebel ausgebildet, wobei der Schwenkhebel 42 in
In der dargestellten Ausführungsform ist das Sitzpolster 41 mit einem Polsterträger 45 ausgebildet, welcher auf der Sitzschale 20 aufliegt. Der Polsterträger kann alternativ auch einteilig mit der Sitzschale 20 ausgebildet sein. In diesem Fall ist das Sitzpolster 41 direkt auf die Sitzschale aufgeschäumt. Das Aufschäumen kann allerdings dann erst nach der Montage der Sitzschale auf dem Sitzträger erfolgen.In the illustrated embodiment, the
Obwohl lediglich im Bereich des Lagerelements in Schnittdarstellung gezeichnet, kann sich die Sitzschale 20 über die gesamte Sitzfläche 3 erstrecken.Although drawn only in the region of the bearing element in a sectional view, the
Obwohl die vorliegende Erfindung anhand bevorzugter Ausführungsbeispiele vorstehend vollständig beschrieben wurde, ist sie darauf nicht beschränkt, sondern auf vielfältige Art und Weise modifizierbar.Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways.
Bei der in
- 11
- Sitzmöbelseating
- 22
- Sitzträgerseat support
- 33
- Sitzflächeseat
- 44
- Verschwenkeinrichtungswiveling
- 5, 5', 5"5, 5 ', 5 "
- AbrollwiegeAbrollwiege
- 66
- Flachseiteflat side
- 7, 7'7, 7 '
- AbrollschieneAbrollschiene
- 88th
- Längsachselongitudinal axis
- 99
- Bahntrain
- 1010
- BürodrehstuhlOffice chair
- 1111
- Sitzbasisseat base
- 1212
- Rückenlehnebackrest
- 1313
- Sitzsäuleseat post
- 1414
- Stuhlkreuzchair cross
- 1515
- StuhlrolleCastor chair
- 1616
- Kopplungsabschnittcoupling portion
- 1717
- Kopplungsabschnittcoupling portion
- 2020
- Sitzschaleseat
- 2121
- konische Wanneconical tub
- 2222
- Lagerelementbearing element
- 2323
- DurchgangsöffnungThrough opening
- 2424
- Vorsprunghead Start
- 3030
- Konusabschnittcone section
- 3131
- erster Endabschnittfirst end section
- 3232
- zweiter Endabschnittsecond end section
- 3333
- DurchgangslochThrough Hole
- 3434
- DistanzhülseStand Off
- 3535
- GummilagerkomponenteRubber bearing component
- 4141
- Polsterpad
- 4242
- ArretiereinrichungArretiereinrichung
- 4343
- Befestigungselementfastener
- 4444
- EinschraubblockEinschraubblock
- 51, 5251, 52
- Anschlagelementestop elements
- 5353
- Arretierhebellocking lever
- AA
- abgerollte Streckeunrolled route
- D1D1
- erster Durchmesserfirst diameter
- D2D2
- zweiter Durchmessersecond diameter
- αα
- Verschwenkwinkelpivot
Claims (15)
- Office swivel chair (10)
comprising a seat support (2) and a seat surface (3) pivotably connected to the seat support (2),
the seat surface (3) comprising a roller cradle (5) on the planar face (6) thereof facing the seat support (2), and the seat support (2) comprising a roller guide (7) arranged in a manner corresponding to the planar face and the roller cradle (5), the roller cradle (5) and the roller guide (7) together forming a pivot means (4),
the pivot means (4) being formed in such a way that the seat surface is pivotable laterally about a longitudinal axis (8) of the office swivel chair by rolling the roller cradle (5) inside the roller guide (7). - Office swivel chair according to claim 1,
characterised in that
the roller guide (7) comprises a guide rail (7) for guiding the roller cradle (5) on a predetermined path (9), which is arranged in such a way that a lateral pivot movement takes place about the longitudinal axis (8) of the office swivel chair (1). - Office swivel chair according to either claim 1 or claim 2,
characterised in that
at least a second roller cradle (5') and a second roller guide (7') are provided and are arranged and formed parallel to the first roller cradle (5) and roller guide (7). - Office swivel chair according to any of the preceding claims,
characterised in that
lateral stop elements (51; 52) and/or dampers are provided for laterally delimiting and/or damping the lateral pivot movement. - Office swivel chair according to any of the preceding claims,
characterised in that
a locking means (42) is provided for locking the lateral pivot means (4). - Office swivel chair according to any of the preceding claims,
characterised in that
the seat surface (3) comprises a seat shell (20) and a cushion (41), the pivot means (4) containing a conically shaped, flexible bearing element (22) for damping a pivot movement of the seat surface (3) with respect to the seat support (2), and the seat shell (20) comprises a correspondingly shaped conical trough. - Office swivel chair according to claim 6,
characterised in that
the conical trough (21) is provided with a through-opening (23), the bearing element (22) being fastenable to the seat support (2) through the through-opening (21) by means of a fastening element (43), and being arranged and formed in such a way that the seat surface (3) is pivotable about the longitudinal axis (8) of the office swivel chair (1) relative to the seat support (2) in a manner damped by the bearing element (22). - Office swivel chair according to either claim 6 or claim 7,
characterised in that
the bearing element (22) comprises a cone portion (30) and has a first constant diameter (D1) in a first end portion (31) of the bearing element (22) and a second constant diameter (D2) in a second end portion (32) opposite the first end portion (31), the second constant diameter (D2) being formed smaller than the first constant diameter (D1). - Office swivel chair according to claim 8,
characterised in that
the bearing element (22) in the cone portion (30) is formed and configured in such a way that it promotes flexible deformation of the first end portion (31) and counters deformation of the second end portion (32) during a pivot movement. - Office swivel chair according to either claim 8 or claim 9,
characterised in that
the bearing element (22) has a lower wall thickness in the first end portion (31) than in the cone portion (30) and/or in the second end portion (32). - Office swivel chair according to any of claims 6 to 10,
characterised in that
the bearing element (22) has a through-hole (33) through which the bearing element (22) can be fastened to the seat support (2) by means of the fastening element (43). - Office swivel chair according to claim 11,
characterised in that
a spacer sleeve (34) is provided in the through-hole (33) at least in the region of the second end portion (32) of the bearing element (22), the bearing element (22) containing a rubber bearing component (35), and the spacer sleeve (34) being inserted into, in particular vulcanised into, the rubber bearing component (35). - Office swivel chair according to any of the preceding claims,
characterised in that
the pivot means (4) comprises at least a second bearing element (22'), the bearing elements (22; 22') together forming the pivot axis forming the longitudinal axis (8) of the office swivel chair (1). - Office swivel chair according to any of the preceding claims,
characterised in that
the seat support (2) is formed integrally with the roller guide (7) and/or in that the seat support contains aluminium or an aluminium alloy. - Office swivel chair according to any of the preceding claims,
characterised in that
the seat shell (20) is formed integrally with the roller cradle (5) and/or in that the seat shell contains a plastics material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012219157.7A DE102012219157A1 (en) | 2012-10-19 | 2012-10-19 | Seating furniture, in particular office swivel chair |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2721960A1 EP2721960A1 (en) | 2014-04-23 |
EP2721960A3 EP2721960A3 (en) | 2014-08-27 |
EP2721960B1 true EP2721960B1 (en) | 2016-09-14 |
Family
ID=49382234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13187919.9A Active EP2721960B1 (en) | 2012-10-19 | 2013-10-09 | Seating furniture, in particular a rotating office chair |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2721960B1 (en) |
DE (1) | DE102012219157A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE202017005210U1 (en) | 2017-10-07 | 2017-11-24 | Michael Nowosielski | Autorekursive swivel mechanism with defined movement sequence |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005042811A1 (en) * | 2005-09-08 | 2007-03-15 | Löffler Bürositzmöbel GmbH | Seating furniture e.g. office swivel chair, has scrolling surface arranged in lower side of frame and V-belt stuck in groove of rail, where surface and V-belt have respective teeth that are adjusted together and engaged with each other |
US20080073958A1 (en) * | 2006-09-26 | 2008-03-27 | Bellin Russell D | Rocking Chair and Anti-Skid Base |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3513985A1 (en) | 1985-04-18 | 1986-10-30 | Margarete Dr.med. 7928 Giengen Kahle | Chair |
DE8815984U1 (en) * | 1988-12-23 | 1989-06-01 | Schmidt, Hartmut, 8713 Marktbreit, De | |
DE29704664U1 (en) * | 1997-03-14 | 1997-05-15 | Bajic Jure Dipl Ing | Seat cushion |
DE19753465C2 (en) * | 1997-12-02 | 2003-08-07 | Walter Frese | Active dynamic, self-resetting seat device |
EP1092372A1 (en) * | 1999-10-14 | 2001-04-18 | Gerhard Schwiewagner | Rocking seat |
GB2359740A (en) * | 2000-03-02 | 2001-09-05 | Abolkheir Group | Hand or arm operated rocking chair |
DE202006011599U1 (en) * | 2006-07-28 | 2006-09-21 | Ehrmann, Thomas, Dr. | Dynamic seat comprises upper plate mounted on hemispherical support which fits into ring on base plate, allowing upper plate to rock in all directions |
WO2010066409A1 (en) * | 2008-12-09 | 2010-06-17 | Eth Zurich | Seat apparatus with a moving seat surface |
-
2012
- 2012-10-19 DE DE102012219157.7A patent/DE102012219157A1/en not_active Withdrawn
-
2013
- 2013-10-09 EP EP13187919.9A patent/EP2721960B1/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005042811A1 (en) * | 2005-09-08 | 2007-03-15 | Löffler Bürositzmöbel GmbH | Seating furniture e.g. office swivel chair, has scrolling surface arranged in lower side of frame and V-belt stuck in groove of rail, where surface and V-belt have respective teeth that are adjusted together and engaged with each other |
US20080073958A1 (en) * | 2006-09-26 | 2008-03-27 | Bellin Russell D | Rocking Chair and Anti-Skid Base |
Also Published As
Publication number | Publication date |
---|---|
EP2721960A1 (en) | 2014-04-23 |
DE102012219157A1 (en) | 2014-05-08 |
EP2721960A3 (en) | 2014-08-27 |
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