EP2381816A1 - Siège avec assise mobile - Google Patents

Siège avec assise mobile

Info

Publication number
EP2381816A1
EP2381816A1 EP09775107A EP09775107A EP2381816A1 EP 2381816 A1 EP2381816 A1 EP 2381816A1 EP 09775107 A EP09775107 A EP 09775107A EP 09775107 A EP09775107 A EP 09775107A EP 2381816 A1 EP2381816 A1 EP 2381816A1
Authority
EP
European Patent Office
Prior art keywords
seat
chair
rotation
rolling
seat surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09775107A
Other languages
German (de)
English (en)
Other versions
EP2381816B1 (fr
Inventor
Daniel Baumgartner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eidgenoessische Technische Hochschule Zurich ETHZ
Original Assignee
Eidgenoessische Technische Hochschule Zurich ETHZ
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Eidgenoessische Technische Hochschule Zurich ETHZ filed Critical Eidgenoessische Technische Hochschule Zurich ETHZ
Priority to EP09775107.7A priority Critical patent/EP2381816B1/fr
Publication of EP2381816A1 publication Critical patent/EP2381816A1/fr
Application granted granted Critical
Publication of EP2381816B1 publication Critical patent/EP2381816B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C9/00—Stools for specified purposes
    • A47C9/002—Stools for specified purposes with exercising means or having special therapeutic or ergonomic effects
    • 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
    • A47C3/0255—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame pivotally mounted in the base frame, e.g. swings

Definitions

  • the invention relates to a seat device for dynamic sitting with a movable seat according to the preamble of claim 1.
  • FIGS. 1 to 3 are, for example, schematic representations, which include the "Pending Chair” of bio-med GmbH, the Schwipp of Schwipp Weg 1-, the Swooper by Aeris, and HSB and Ergo Topp of the HSB Caribbean.An option is also a translatory one Component in the movement through a two-armed chair, depending on the body movement, as shown in Fig. 2. The pivot points are located respectively below the seats of the chairs.
  • movable chair designs have integrated the axis of rotation directly at the level of the seat, as shown in FIG.
  • This solution causes tilting and tilting of the pelvis and the spine, which is compensated with the upper body by an opposite inclined position to maintain the balance.
  • Relative to the work table results in a lateral displacement and additional immersion of the upper body, which adversely affects the work process.
  • Fig. 5 shows the spine conditions in a lateral translational movement of the seat
  • Fig. 6 shows an adjustment of the spine of a user at a pivot point below the seat.
  • Van Deursen has shown reduced height loss of the spine on movement in three studies in 1999 and 2000, possibly suggesting better protein supply (van Deursen, DL, RH Goossens, et al., 2000) and Ergon 31 (1): 95-8.), and a slight reduction in back pain when using an active mobile chair (van Deursen, DL, M. Lengsfeld, et (2000). "Mechanical effects of continuous passive motion on the lumbar spine in seating.” J Biomech 33 (6): 695-9.) and the mechanical effects of a rotational, tilting seat on the spine function and posture (Lord spine lordosis) (van Deursen, LL, J. Patijn, et al., 1999).
  • an armchair with a molded seat shell is known in which this comprises a round seat shell, which is arranged in a concentric bearing shell.
  • this are stored between the seat and the bearing shell balls that rest on springs.
  • Sense of this arrangement is the consequences of the seat recess in the person's movements of the sitter; that is, the mobility of the seat recess of the chair should allow the occupant or better lying down to change a position without moving against the fabric of the seat.
  • the document refers to a chair without the possibility of occupying an upright sitting position therein, and contains no information on the dimensions of the curvature of the seat pan.
  • the dynamic sitting device has a movable seat. This has at least one axis of rotation in the region of the thoraco-lumbar spine. The axis of rotation is connected to a supporting support device and is at least a horizontal axis of rotation which is in the median plane of a seated user on the device.
  • Figures 1 to 3 are a graphic representation of prior art chairs with movable side-tipping seating surfaces; 4 to 6 are graphs showing the position of centers of rotation in chairs of the
  • FIG. 7 is a schematic representation of a chair according to a first
  • FIG. 8 is a schematic representation of a chair according to a second
  • FIG. 9 is a schematic representation of a chair according to a third
  • FIG. 10 is a schematic representation of a chair according to a fourth
  • FIGS. 11 & 12 are schematic representations of a chair with modifications based on the fourth embodiment of the invention
  • 13 shows a schematic illustration of the mounting of a seat surface on ball bearings according to a fifth embodiment
  • 14 shows a schematic illustration of the mounting of a seat surface on rolling cylinders according to a sixth embodiment
  • 15A to 15C is a schematic representation of the storage of a seat with
  • FIG. 16 is a schematic representation of a chair according to a seventh
  • FIG. 17 is a schematic representation of a chair according to a eighth
  • FIG. 18 is a schematic representation of a chair according to a ninth
  • Figures 1 to 3 show a graphic representation of three prior art chairs with movable side-facing seats. These are common that they include a lateral tilt. The axis of rotation is indicated in each case by the reference numeral 25.
  • Figs. 4 to 6 are graphs showing the position of centers of rotation in chairs of the prior art.
  • the seat has received the reference numeral 1.
  • the illustrated spine 2 of a user of the chair shown is bent in the left representation relative to the median axis 3.
  • In the middle of a lateral displaceability of the seat 1 of the chair is shown, resulting in a lateral S-shape of the spine posture 2 to the upper body in to keep the existing median axis 3.
  • a center of rotation 4 is shown below the seat 1 on the right, resulting in a straight spine 2 with an inclined orientation in the direction of the new median axis 3 of the user's body.
  • FIGS. 7 to 10 show four embodiments of chairs 10, 20, 30 and 40 according to the invention.
  • the chairs shown have a spider base 11 with castors, but can also have a base without castors as in chair 30. It is clear that the foot shape of the chair is immaterial to the function described below.
  • the chair shown in Fig. 7 has an S-shaped bent chair leg 12, so that the center of the seat 21 is above the center of the foot 11. The attachment of the seat 1 on the chair leg 12 will be explained below.
  • the chair 10 of FIG. 7 does not use a backrest.
  • the seat 1 consists of a horizontally illustrated plate 21 which is integrally formed with a polygonal, in the upper part triangular transition piece 23 which is aligned substantially perpendicular to the plate 21 and thus parallel to the longitudinal axis of the chair (26 in Fig. 10) ,
  • This transition piece 23 comprises a bearing 24, whose axis 25 is aligned parallel to the plate 21 and via a corresponding bearing pin (not shown) is connected to the chair leg 12.
  • the anterio-posterior axis of rotation 25 is aligned above the seat formed by the plate 21, namely, the arrangement is provided at the level of the area of the thoraco-lumbar spine of a user.
  • the backrest 5 is fixedly mounted on the axis 25 on the chair leg 12, so that only the seat 1 is rotatably attached to the seat surface 21 and the transition piece 23 about this horizontal axis 25 of the chair 20.
  • the back of the user leaning against the backrest 5 receives a support in the upper area above the axis of rotation 25, so that it does not rub against the backrest 5 even when the seat surface 1 is moving.
  • the backrest 5 is not as long as shown in Fig. 8, but shorter, so that no back contact with the back 5 in the rotating region of the spine below the axis of rotation 25 can occur.
  • the axis of rotation 25 is a sagittal axis and therefore runs horizontally from front to back in relation to a user intended for sitting on the chair and lies in the sagittal plane.
  • the new, inventive position of the center of rotation is primarily the pelvis and the lumbar spine 2 of a user sitting on the chair rotate, the upper body remains stable during work and the work process is not disturbed by the movement.
  • the invention therefore involves a movable seat 21 of a dynamic sitting concept such that movement of the seat 21 is spatially defined Rotational movement that is in line with the center of rotation in the area of the thoraco-lumbar spine.
  • the movable seat 21 is designed so that a person sitting on it can induce the spatial movement by a muscular contraction, without the self-weight from the going through the center of gravity vertical axis of the upper body to trigger the movement must be moved decentrally and the center of gravity of Upper body remains in the longitudinal axis of the spine.
  • the inventive chair design requires the activation of the lateral spinal muscles, so that a rotation of the seat is triggered. These new kinematic conditions are achieved by changing the position of the center of rotation of the seat.
  • the center of rotation 25 of a chair design 30 according to the invention is located, for example in the third exemplary embodiment of FIG. 9, in which the chair leg is simply oriented straight vertically above the seat 21, approximately at the level of the intervertebral discs L3 to ThIO, advantageously in the range Ll to L3 or L2-L3. This results in a more stable position, especially in a deflected state of the seat 21. To reach the normal sitting position again, no muscular force must be expended, the initial position is automatically after relaxation again.
  • the suspension of the seat 21 is arranged by the transition piece 23 or the strut 33 at a distance from the axis of rotation, that this distance means for a user that the intervertebral discs L2-L3 are equal to the axis of rotation.
  • Fig. 10 shows a fourth embodiment of the invention, wherein in the chair 40, the backrest 5 is inserted into the chair leg 12 in a manner known to those skilled, but above the center of rotation 25.
  • the seat 21 can pivot freely about the axis 25 while the back of the user above the axis of rotation 25 finds a fixed support in the backrest 5.
  • the foot 11 is configured symmetrically with respect to a vertical longitudinal axis 26 of the chair.
  • the supporting support 12 has an S-shaped chair leg which begins in the symmetrical leg and then pivots out of the axis to receive the pivot 24 in another section parallel to the vertical longitudinal axis 26.
  • the axis of rotation 25 and the longitudinal axis 26 intersect at a point that lies in the median plane of a person using the chair and in the frontal plane of this person with respect to the upper body (ie without extremities beyond the pelvic area).
  • the transition piece 23 is adjustable in its length.
  • a corresponding exemplary embodiment is shown in FIG. 11 with the chair 50. It is essential that said distance of an arrangement of the axis of rotation (or of the pivot point according to further exemplary embodiments presented below) is in the region of the thoraco-lumbar spine of a user.
  • the transition piece 23 consists of two separate sections 35 provided with a rib toothing: the section mounted in FIG. 24 can have a fixed hole or threaded hole, while the opposite section 35 connected to the seat surface 21 has a sequence of superimposed holes, then that by a locking pin 36 or a corresponding screw in the corresponding hole of the portion 35 of the seat, the two sections are connectable.
  • the distance of the seat 21 to the axis 25 on the distance from the seat to the area of the spine L3 to ThIO or L2 / L3 of the user adjustable is adjustable.
  • Other embodiments are possible, such as a telescopic extension, for example, with bayonet lock. It should be noted that this extension can be used and combined not only in the exemplary embodiment of FIG. 12 but also with all other exemplary embodiments. Therefore, the same or similar features are denoted by the same reference numerals in all figures.
  • FIG. 11 is shown by suspending an L-shaped seat surface 21, 23 at the level of the belly button of a user by means of a rotary bearing 24.
  • the user is advantageously symmetrical to Longitudinal axis 26 of the chair on the seat.
  • the location of the fulcrum on the vertical surface 23 of the L-profile can be varied so that the height of the fulcrum of the spine is also adjusted.
  • Decisive is the vertical distance between bearing 25 and seat 21, which induces the center of rotation at a corresponding height of the spine.
  • This pivot bearing 25 can thus be adapted to the individual sizes of the respective user and to his needs.
  • Fig. 12 shows another feature which can be applied or combined individually with the other features of the various embodiments. Due to the bearing 24 on the axis 25, a load on the seat 21 user generates a torque which loads this camp.
  • an opening may be provided in the chair leg 12, in which a wheel 37 is rotatable about a vertical axis 39 through corresponding bearings 38.
  • the wheel 37 is dimensioned so that it is supported on the back of the transition piece 23.
  • the main load of the moment is transmitted via the wheel 37 in the chair leg and not only charged the bearing 24.
  • a wheel may also be provided a ball which is held with a smaller diameter than the ball having cover in said cavity.
  • three such wheels may be provided in the then wider designed chair leg 12, wherein the axes 39 of the other two wheels are oriented so that they are viewed from the front of the chair inclined, a plane parallel to the main plane of the transition piece 23 and span the axes intersect in the axis of rotation 25.
  • FIG. 13 shows a schematic representation of the mounting of a seat surface 21 on three ball bearings 34.
  • On the ball bearings 34 rests a correspondingly curved bottom 43 of the seat pan 21.
  • the curvature of the seat is such that it corresponds to a spherical shell having a ball center, the is at a distance from the seat 21, so that said ball center is, for example, in the region of the intervertebral discs L2-L3 of a user of the seat.
  • the difference from the embodiment of FIG. 11 is the fact that the seat surface does not rotate about a horizontal axis of rotation arranged in the said distance, but about a pivot point arranged at said distance. If the user executes only a sideways movement, the movement of ceremonisbeispicls according to Fig. 11.
  • FIG. 14 shows, together with FIGS. 15A to 15C, a further embodiment of a seat 21 of the invention, the solution consisting of the mounting of two adjoining curved shells 41, 42.
  • the upper shell is the seat pan 41, the lower shell the bearing shell 42.
  • the shells are shown in cross-section, so that they are a shell of cylindrical surfaces.
  • the intermediate bearing consists of bearing rollers 45, thereby allowing the displacement of the upper shell 41 relative to the lower 42.
  • the mutually moving convex outer surfaces of the shells may represent segments of a cylinder, cone or a ball, wherein the movement in a cylindrical surface (as shown here) is predetermined in one direction; when using a sphere, they can be combined in two main directions.
  • Fig. 15A shows the seat 21 in a rest position
  • Figs. 15B and 15C in a left and right, respectively, deflected position.
  • the cylindrical rolling bodies 45 are inserted in principle loosely between the shells 41 and 42.
  • On the upper side 53 of the lower shell in each case the free ends of two bands 46 with respect to the rolling bodies 45 are fastened on both sides of the center of the seat surface.
  • the bands 46 are then tangential to the lateral surface of the respective rolling body 45 and led to this around.
  • the opposite free ends of the bands 46 are fixed on the underside 43 of the seat 41 relative to the other free ends.
  • the band 48 is not shown as a continuous band, which may then not be attached to the bottom 43 of the seat 21, but is attached only at the two free ends on the top 53 of the lower shell 42.
  • the band 48 is shown in FIG. 15 as two central bands to show that by the rolling of the cylinder 45, the bands 46 and 48 be moved against each other so that they roll up or down the length with respect to their free ends and thus a low-friction movement of the seat is realized on the cylinders.
  • the at least one further band 48 of the two rolling bodies 45 is a one-piece continuous band, its free ends are fastened either only to the underside 43 of the seat shell 41 or to the upper side 53 of the bearing shell 42 and otherwise in one piece to the upper side 53 or the underside 43 led.
  • the band In an arrangement with respect to the upper side 53, the band generally does not run directly against it due to the curvature of the bearing shell 42, but is stretched between the two rolling bodies 45.
  • the adjustment of a bias of the bands 46, 48 simplifies the functionality of the low-friction tilting movement of the seat 21.
  • a further embodiment can be realized in that a movable upper part is arranged relative to the fixed chair lower part, wherein the position of the upper movable and lower fixed part is defined by rolling bodies.
  • the movable upper part may take on the shape of spherical cutouts, cylinders or cones on its convex underside, so that the superiore position of the center of rotation results from the radii of these shapes.
  • rolling bodies On the lower shell are said rolling bodies.
  • These rolling elements can be two cylinders. It may also be that these rolling elements are slightly conical truncated cones, which are oriented opposite. That is, the thicker end portion of one rolling body opposes the thinner end portion of the other rolling body.
  • the cylinders 45 of FIGS. 14 and 15 may also be other bodies of revolution enabling a rolling behavior.
  • the rolling elements between the upper and lower part are designed so that they roll when moving the movable upper seat relative to the lower fixed part of the chair without resistance.
  • they are fixed by straps or ropes.
  • the mobility through the movable seat can be controlled and, depending on the intensity, can be controlled by the user himself through his muscular work.
  • body mass must be used.
  • An alternating relief of the left and right side of the gluteus maximus animates to relaxed back and pelvic structures and contributes to an alternating shift of weight in the buttocks.
  • FIGS. 14 and 15 show a schematic representation of the mounting of a seat surface 21 according to two further embodiments of chairs 70 and 80.
  • This embodiment of the seat shells 21 use the same rotation principle.
  • the lower bearing shell 42 is a straight horizontal surface, whereas the lower surface 43 of the upper seat shell 41 is round.
  • the cylindrical bearings 45 in between allow the rolling motion of the seat pan.
  • the actual seat 21 is flat and flat.
  • the rolling movement is realized as shown in FIGS. 14 and 15 with bands 46 and 48.
  • the lower sliding surface 42 in particular its upper side 53, is round, and the upper shell 41 is straight, in which case wheels or cylinders 45 are fastened to the seat shell 41 via bearings.
  • the reference numeral 25 in each case the axis of rotation is marked.
  • FIG. 18 shows a schematic perspective view of a chair 90 according to a further exemplary embodiment of the invention.
  • a centrally arranged and horizontally extending fork 91 is fixed to the support means 12, which is branched into two arms 92.
  • two ball bearings 93 are arranged in a longitudinal distance of the arms.
  • the curved at least on the bottom 43 seat 21 is placed, which is shown here transparent.
  • the curvature of the seat 21 is such that a lateral movement of the seat 21 is possible, whereby by the curvature in the support surface, a pivoting about a horizontal axis is achieved, which is arranged in a range between 20 and 40 centimeters above the seat 21.
  • this corresponds to a lateral tilt about a horizontal axis at the level of the vertebrae L3 to ThIO.
  • the seat has the corresponding curvature; a direct adjustability is given only by replacing the seat shell 41, namely against a seat shell with a different curvature 43 of its underside.
  • a correspondingly curved slot can be provided in the back of the seat surface 21, through which the horizontally extending arms 92 pushed.
  • the seat 21 may be closed at the bottom by a likewise correspondingly curved shell.
  • the positions of the upper movable and lower fixed parts are defined relative to one another via the said rolling bodies 45 such that sliding friction-free, unresisting rolling of the two parts takes place relative to one another by means of the rolling bodies.
  • the advantage of selecting the axis of rotation 25 in the region of the spinal column sections L3 to ThIO or advantageously L2 to ThI l or L3 to L2 or in the range between Thl2 to Ll is that the lateral inclination or lateral bending of the spine, which in the vertebrae from Sl up into which L-vertebrae is large, first in the area L2 / L3 falls sharply.
  • a large range of motion ROM (for ranks of motion) remains in the combination of flexion / extension with axial rotation, which surprisingly has a positive effect on tension in the area of the thoraco-lumbar spine.
  • the rotation of the seat is controlled by muscular contraction and not with displacement of body weight as in previous principles.
  • the lateral trunk musculature is activated, in particular M. obliquus ext./int. abdominus, and M. transversus abdominus.
  • the physiological center of rotation of the upper body is in accordance with the technical axis of rotation of the chair, and therefore congruent with each other. There is a movement that the spine performs under everyday movements, unless it is restricted by a mechanism such as a chair.
  • Such a chair can also be used for patients in the field of regenerative medicine.
  • the chair can be a kind
  • Adjustment of the rotation center is able to apply the appropriate kinematic conditions during therapy.

Landscapes

  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

L'invention concerne un appareil (30) destiné à fournir une assise dynamique, avec une surface d'assise mobile (21). Celle-ci possède au moins un axe de rotation (25) au niveau de la colonne vertébrale thoraco-lombaire. L'axe de rotation (25) est relié à un dispositif porteur de soutien (22). Il s'agit au moins d'un axe de rotation (25) horizontal qui se situe dans le plan médian d'un utilisateur assis sur l'appareil, déterminé par la surface d'assise (21).
EP09775107.7A 2008-12-09 2009-12-09 Siège avec assise mobile Active EP2381816B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09775107.7A EP2381816B1 (fr) 2008-12-09 2009-12-09 Siège avec assise mobile

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08021326 2008-12-09
PCT/EP2009/008786 WO2010066409A1 (fr) 2008-12-09 2009-12-09 Siège avec assise mobile
EP09775107.7A EP2381816B1 (fr) 2008-12-09 2009-12-09 Siège avec assise mobile

Publications (2)

Publication Number Publication Date
EP2381816A1 true EP2381816A1 (fr) 2011-11-02
EP2381816B1 EP2381816B1 (fr) 2013-05-08

Family

ID=41697921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09775107.7A Active EP2381816B1 (fr) 2008-12-09 2009-12-09 Siège avec assise mobile

Country Status (2)

Country Link
EP (1) EP2381816B1 (fr)
WO (1) WO2010066409A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012219157A1 (de) * 2012-10-19 2014-05-08 Sedus Stoll Ag Sitzmöbel, insbesondere Bürodrehstuhl
DE202017005210U1 (de) 2017-10-07 2017-11-24 Michael Nowosielski Autorekursive Schwenkmechanik mit definiertem Bewegungsablauf
AT521926B1 (de) 2018-12-06 2020-10-15 Walter Schindlegger Sitz mit bewegter Sitzfläche
US11825949B2 (en) 2021-05-04 2023-11-28 Michael David Collier Ergonomic motion chair

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1099142B (de) 1955-05-23 1961-02-09 Ferdinand Holzmann Sessel mit formfester Sitzschale oder -mulde
DE8914349U1 (de) 1989-12-06 1990-01-25 Brosch, Manfred, 6967 Buchen Übungsgerät in Form eines Sitzes mit einer Sitzfläche
DE4239548A1 (en) 1992-11-25 1993-04-15 Juergen Stiewe Office or work chair - has brackets, rollers, and circular tracks to allow adjustable tilt for seat and backrest
DE19915003A1 (de) 1999-04-01 2000-10-05 Michael Stips Sitzvorrichtung und Verfahren zu ihrer Steuerung
DE10200846B4 (de) * 2002-01-11 2004-02-12 Walter Frese Verschwenkbare Sitzanordnung
DE20303472U1 (de) 2003-03-05 2003-06-26 Franke Martin Vorrichtung die als dynamische Sitzgelegenheit dient
US20060103221A1 (en) * 2004-10-08 2006-05-18 Ronald Kleist Ergonomic chair
DE202007016488U1 (de) * 2007-11-06 2008-02-21 Prömm, Felix Tobias Sitzvorrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010066409A1 *

Also Published As

Publication number Publication date
EP2381816B1 (fr) 2013-05-08
WO2010066409A1 (fr) 2010-06-17

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