EP2387913A1 - Dispositif destiné à l'amélioration du maintien en position assise de l'humain - Google Patents

Dispositif destiné à l'amélioration du maintien en position assise de l'humain Download PDF

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Publication number
EP2387913A1
EP2387913A1 EP10163572A EP10163572A EP2387913A1 EP 2387913 A1 EP2387913 A1 EP 2387913A1 EP 10163572 A EP10163572 A EP 10163572A EP 10163572 A EP10163572 A EP 10163572A EP 2387913 A1 EP2387913 A1 EP 2387913A1
Authority
EP
European Patent Office
Prior art keywords
damping
piston
seat plate
control piston
damping device
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
EP10163572A
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German (de)
English (en)
Other versions
EP2387913B1 (fr
Inventor
Karl-Heinz Brändle
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Individual
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Individual
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Publication date
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Priority to EP10163572A priority Critical patent/EP2387913B1/fr
Publication of EP2387913A1 publication Critical patent/EP2387913A1/fr
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Publication of EP2387913B1 publication Critical patent/EP2387913B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/14—Seat parts of adjustable shape; elastically mounted ; adaptable to a user contour or ergonomic seating positions
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/446—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with fluid springs

Definitions

  • the invention relates to a device for improving the human sitting position on a chair or the like, which is arranged in particular between a pillar and a seat plate of a chair.
  • Such a device is the EP 0579097 A1 refer to.
  • a ball joint is provided, through which the movements of the seat plate is transferred to the column.
  • the resulting from the movements of the upper body of humans tilting the seat plate during the sitting position, are thus transmitted via the ball joint to the column of the chair, the movements.
  • This should cause the back muscles of man is constantly strained and that the intervertebral discs and other human back joints are constantly in motion to avoid postural damage.
  • the sitting posture is constantly correct, since the device, in particular the ball steering of the device, limits the stability of the seat plate.
  • the seat plate is tiltable about a plurality of axes or degrees of freedom perpendicular to the column of the chair.
  • any seat position change is not hindered by the ball joint, so that the seat plate is constantly moved around the center of the ball joint.
  • the seat plate is to be aligned in the horizontal plane as possible by the position of the user. Accordingly, the inclination correction of the seat plate takes place exclusively by the user.
  • the degrees of freedom in the change of the seat plate and the inclination angle should be defined adjustable.
  • the deflection of the seat plate to a horizontal, perpendicular to the column of the chair axis of rotation should be adaptable to individual needs.
  • the seat plate by means of the hinge means tiltable about three different axes of rotation relative to the column of the chair is deflectable, and that at the same time the damping piston acting on the seat plate such that its tilt adjustment is cushioned or damped, it is ensured that the movements of the seat plate against a reaction force coming from the damping pistons is generated, is to be made.
  • the reaction forces exerted by the damping piston are adaptable to the tilt position of the seat plate such that the reaction forces increase linearly the greater the angle of inclination of the seat plate. This is achieved by means of the position of the control piston, by means of which the flow of the medium through the conduit system is automatically controlled.
  • the inclination angle of the seat plate relative to the column are variably adjustable, so that the deflection of the seat plate from the horizontal plane of a user of the chair is freely selectable.
  • each damping piston exerts a restoring force on the seat plate, which is to be overcome by the user to change the inclination position of the seat plate, higher loads are required, which allow a defined movement of the seat plate in the first place to prevent postural damage during sitting.
  • the lines provided in the damping device are arranged in such a constructive manner that each damping piston is assigned a line system, so that each damping piston is acted upon in dependence on the inclination position of the seat plate, which is detected by the control piston, with a certain presettable pressure state. Consequently, the possibility of movement of the respective damping piston is both externally adjustable and predetermined by the inclination position of the seat plate.
  • the control piston has two sealing ring surfaces which are axially displaced over the apertures formed in the sleeve, depending on the inclination position of the seat plate.
  • the medium filled in the conduit systems for example hydraulic fluid, can flow back and forth within the pressure space in which the respective damping piston is inserted in a limited manner.
  • the damping property of the respective pressure piston is variable.
  • the reduction of the line cross-section through the sealing ring surfaces of the control piston thus ensures that the pressure piston are damped or released in dependence on the position of the control piston and through which in the respective As soon as the application of force to the seat plate is reduced, it is transferred back to the horizontal plane by the compression springs and the damping piston is pressed by the compression spring into its starting position.
  • the seat plate is thus arranged in the unloaded state in the desired horizontal plane, so that the user feels when first sitting on the seat plate no balance problems, but rather individually adjusts the inclination of the seat plate after the first load.
  • the control piston is adjustable from the outside in its position, it is ensured that the passage openings or cross-sectional areas of the conduit system in the interior of the damping device by means of the control piston either as a function of the seating position or depending on the individual ideas for damping the movement of the seat plate by the user are adjustable.
  • the set screw namely the passage is either completely released or almost completely closed or released between these two extreme positions a corresponding cross-sectional area through which the medium flows through the interior of the conduit system. It is understood that with reduction of the passage area of the conduit system, the damping properties of the damping piston are changed so that they are slower or to move with an increased force. With complete release of the cross-sectional areas, the medium flows unhindered through the conduit system, so that only the friction caused by the flow of the medium in the interior of the conduit system exert damping properties.
  • a device 1 is shown in an enlarged view, is connected by a seat plate 4 to a column 3 of a chair 2 such that the seat plate 4 is tiltable about at least one perpendicular to the longitudinal axis 7 of the column 3 axis of rotation and at the same time the inclination change of the seat plate 4 is damped or cushioned.
  • the device 1 consists of a hinge device 11 explained in more detail below and of a damping device 21, by means of which the adjustment in the corresponding degrees of freedom and their damping and return is made possible.
  • FIGS. 2a . 2b and 2c show the structural design and the operation of the hinge device 11 .
  • the hinge device 11 comprises three bodies 12, 13 and 14 which are pivotable relative to one another in a specific manner.
  • the first body 12 is rotatably supported on the damping device 21. This is achieved in that the body 12 has two mutually aligned openings 20, in each of which a pin 15 is inserted.
  • the pin 15 is inserted on the damping device 21 in attached to this projections 41.
  • an opening 20 ' is incorporated, which is aligned in the mounted state to the opening 20 of the body 12.
  • this is mounted in a plastic shell 17, which is arranged between the body 12 and the Anformung 41.
  • This type of storage is in particular from the enlarged sectional view of FIG. 2b refer to.
  • the pin 15 thus forms an axis of rotation 16 for the body 12 on the damping device 21.
  • the body 12 essentially has a triangular outer contour; one of the legs is therefore defined by the axis of rotation 16.
  • an adjusting screw 18 Spaced to the axis of rotation 16, an adjusting screw 18 is inserted in the body 12, the free end 19 on the surface of the damping device 21, as in particular FIG. 1 is shown, rests when the inclination of the seat plate 4 is deflected about the axis of rotation 16 in the direction of the damping device 21.
  • the free end 19 of the adjusting screw 18 serves as a surface stop, through which the movement or inclination of the body 12 is adjustable.
  • FIG. 2a it can be seen that between the axis of rotation 16 and the position of the adjusting screw 18 on the body 12, a further axis of rotation 16 'is provided, on which the second body 13 is pivotally mounted on the first body 12.
  • the structural design of the rotation axis 16 ' is identical to the construction of the rotation axis 16 as explained above.
  • the axis of rotation 16 ' is parallel and spaced from the axis of rotation 16.
  • the second and third bodies 13 and 14 are substantially U-shaped in cross-section, so that perpendicular to the axis of rotation 16 'a rotation axis 16 "extends, by means of which the third body 14 is held on the second body 13 strigkbar. Also, the construction of the rotation axis 16 "is identical to the construction of the rotation axis 16.
  • the hinge device 11 has three axes of rotation 16, 16 'and 16 ", around which the seat plate 4 can be pivoted with respect to the damping device 21 and the column 3.
  • the body 14 is fastened to the underside of the seat plate 4.
  • the damping device 21 has two mutually parallel damping piston 22 and 23.
  • the damping pistons 22 and 23 are supported in the interior of the damping device 21, as will be explained in more detail below; a attached to the damping piston 22 or 23 piston rod 35 protrudes from the damping device 21.
  • the free end 35 'of the piston rod 22 protrudes from the damping device 21 in the direction of the underside of the seat plate 4 and is in operative connection with this. Consequently, the damping piston 22 and 23 pass through the hinge device 11, as in particular FIG. 1 can be seen.
  • FIG. 3 the support of the damping piston 22 and 23 is shown, between which a control piston 24 is arranged, so that the axes of the damping piston 22, 23 and the control piston 24 form a triangle in plan view.
  • the free end 36 of the control piston 24 is also in operative connection with the underside of the seat plate 4.
  • a piping system 26 can be seen schematically.
  • Each of the two damping pistons 22 and 23 is associated with one of the conduit systems 26, which are therefore not connected to each other, but each of the damping piston 22 and 23 is inserted into a pressure chamber 29 which is provided in the interior of the damping device 21.
  • the damping piston acts in the initial state against the force of a spring 10 and against the filled in the pressure chamber 29 medium 25, namely, by pressing down the respective pressure piston 22 or 23 is to be pressed out of the pressure chamber 29.
  • That in the FIGS. 4a and 4b shown line system 26 consists of two lines 27 and 27 'for the pressure chamber 29 of the damping piston 22 and two lines 28 and 28' for the pressure chamber 29 of the damping piston 23.
  • the lines 27 and 27 'and 28 and 28' open to each other in different Height levels in the respective pressure chamber 29 and are separated by the respective pressure piston 22 or 23 from each other.
  • the pressure chamber 29 is permanently completely filled with a medium 25, which is formed for example as hydraulic fluid filled.
  • the damping piston 22 If the seat plate 4 loaded on one side, for example, the damping piston 22 is acted upon by force and is pressed into the damping device 21, so that the medium 25 is pressed out of the pressure chamber 29 through the lower line 27.
  • the medium 25 flows through the conduit 27 into a control chamber 30 into which the control piston 24 is inserted. Since the control piston 24 is also pressed axially by the load of the seat plate 4 in the interior of the damping device 21, its position has changed from the initial state.
  • the control piston 24 namely the flow rate, which can flow through the line 27 into the control chamber 30 and from this back through the line 27 'in the pressure chamber 29 of the damping piston 22, be adjustable, be regulated.
  • a sleeve 31 is inserted into the control chamber 30, in which a total of four openings 32 are incorporated. Each of the lines 27, 27 'and 28 and 28' opens into one of the openings 32.
  • the sleeve 31 is fixedly mounted in the interior of the damping device 21; relative to the sleeve 31, the control piston 24 is mounted axially movable.
  • the opening 32 which is associated with the line 27 ', partially closed, so that the flow rate and the flow rate through the line 27' back into the Pressure chamber 29 of the damping piston 22 can flow, is reduced.
  • the damping piston 22 depending on the position of the control piston 24, limited in its movement, because it is a higher force required, the medium 25 through the line 27 back into the pressure chamber 29 through the line 27 'to press.
  • the control piston 24 immersed in the lowest of the openings 32, which is associated with the line 27 and closes it.
  • the two sealing ring surfaces 33 which are provided on the control piston 24, are therefore each associated with one of the openings 32 or 32 "of the conduit system 26, such that by the axial displacement of the control piston 24, the corresponding openings 32 or 32" wholly or partially are closed by the sealing ring surfaces 33 in order to change the possibilities of movement of the respective damping piston 22 and 23 respectively.
  • the control piston is lifted by a spring 10, so that the openings 32 are released in the sleeve 31, so that the medium 25 can flow freely in the respective line system 26.
  • the damping piston 22 and 23 associated spring 10 are pressed from the damping device 21 upwards, so that the seat plate 4 is transferred to a horizontal position.
  • FIG. 3 is further shown that the free ends 35 'of the piston rods 35 are arranged in a ball joint 37, which consists of two half-shells 38' and 38 "and a ball 38.
  • the ball 38 is between the two half-shells 38 'and 38th "arranged.
  • the damping piston 22 or 23 associated half-shell 38 ' has a receiving pocket, in which the ball 38 is held.
  • the seat plate 4 associated half-shell 38 "has an arcuate inner contour on which the ball 38 can roll, so that the movements of the seat plate 4 are not hindered by the operative connection between the respective piston rods 35.
  • a permanent magnet 40 is provided laterally next to the ball joint 37.
  • the north pole of the permanent magnet 40 is attached to the piston rod 35 and the South pole of the permanent magnet 40 is associated with the underside of the seat plate 4. Between the two poles of the permanent magnet 40 thus results in a magnetic field whose attractive force is dimensioned so large that the seat plate 4 can not be lifted upwards from the free ends 35 'of the piston rods 35.
  • the medium 25 can be refilled from outside into the line system 26. It is also conceivable to provide a reservoir in the interior of the damping device 21 which communicates with the respective conduit system 26 via a needle valve, for example, so that the medium 25 is self-contained when the pressure in the pipeline 26 is reduced due to leakage losses in the respective conduit system 26 nachströmt. Consequently, it is ensured that in the line system 26, a constant pressure prevails, so that the damping properties of the damping device 21 is constant even during a large number of load changes or can be adjusted by a user to the individual needs.
  • FIG. 5 It can be seen that the damping properties for the damping piston 22 and 23 is manually adjustable from the outside by means of the control piston 24. Because of the position of the control piston 24, the two sealing ring surfaces 33 are in such a way, with respect to the passage openings 32 and 32 ", positioned that the cross-sectional area of the respective passage openings 32 and 32" are completely or partially opened by them. As a result of the positioning of the control piston 24, the damping or spring property of the pressure pistons 22 and 23 can thus be adapted individually to the user's ideas.

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  • Fluid-Damping Devices (AREA)
EP10163572A 2010-05-21 2010-05-21 Dispositif destiné à l'amélioration du maintien en position assise de l'humain Not-in-force EP2387913B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10163572A EP2387913B1 (fr) 2010-05-21 2010-05-21 Dispositif destiné à l'amélioration du maintien en position assise de l'humain

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10163572A EP2387913B1 (fr) 2010-05-21 2010-05-21 Dispositif destiné à l'amélioration du maintien en position assise de l'humain

Publications (2)

Publication Number Publication Date
EP2387913A1 true EP2387913A1 (fr) 2011-11-23
EP2387913B1 EP2387913B1 (fr) 2013-03-27

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EP10163572A Not-in-force EP2387913B1 (fr) 2010-05-21 2010-05-21 Dispositif destiné à l'amélioration du maintien en position assise de l'humain

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2742827A1 (fr) 2012-12-11 2014-06-18 Karl-Heinz Brändle Dispositif d'amortissement
JP2019037383A (ja) * 2017-08-23 2019-03-14 コクヨ株式会社 椅子
CN110022724A (zh) * 2016-12-20 2019-07-16 国誉株式会社 椅子和椅子的罩构件
EP3560386A4 (fr) * 2016-12-21 2020-08-19 Kokuyo Co., Ltd. Chaise
EP3643205A4 (fr) * 2017-06-20 2020-10-21 Kokuyo Co., Ltd. Chaise
EP3560384A4 (fr) * 2016-12-20 2020-11-04 Kokuyo Co., Ltd. Chaise
EP3643203A4 (fr) * 2017-06-20 2020-11-11 Kokuyo Co., Ltd. Chaise

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095770A (en) * 1976-11-01 1978-06-20 Long Daniel C Tiltable seat for tractor and the like
EP0579097A1 (fr) 1992-07-15 1994-01-19 Lineager S.R.L. Articulation à rotule avec blocs d'amortissement pour raccorder l'assise à la colonne de support d'un siège
WO2007105960A1 (fr) * 2006-03-15 2007-09-20 Jurek Buchacz Dispositif permettant de regler un siege de chaise
WO2009127061A1 (fr) * 2008-04-18 2009-10-22 2171584 Ontario Inc. Siège réglable hydraulique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095770A (en) * 1976-11-01 1978-06-20 Long Daniel C Tiltable seat for tractor and the like
EP0579097A1 (fr) 1992-07-15 1994-01-19 Lineager S.R.L. Articulation à rotule avec blocs d'amortissement pour raccorder l'assise à la colonne de support d'un siège
WO2007105960A1 (fr) * 2006-03-15 2007-09-20 Jurek Buchacz Dispositif permettant de regler un siege de chaise
WO2009127061A1 (fr) * 2008-04-18 2009-10-22 2171584 Ontario Inc. Siège réglable hydraulique

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2742827A1 (fr) 2012-12-11 2014-06-18 Karl-Heinz Brändle Dispositif d'amortissement
EP3560384A4 (fr) * 2016-12-20 2020-11-04 Kokuyo Co., Ltd. Chaise
CN110022724A (zh) * 2016-12-20 2019-07-16 国誉株式会社 椅子和椅子的罩构件
EP3560385A4 (fr) * 2016-12-20 2020-08-12 Kokuyo Co., Ltd. Chaise et élément de couverture de chaise
US10842276B2 (en) 2016-12-20 2020-11-24 Kokuyo Co., Ltd. Chair and cover member of the chair
US10856660B2 (en) 2016-12-20 2020-12-08 Kokuyo Co., Ltd. Chair
EP3560386A4 (fr) * 2016-12-21 2020-08-19 Kokuyo Co., Ltd. Chaise
US11253077B2 (en) 2016-12-21 2022-02-22 Kokuyo Co., Ltd. Chair with return force mechanism
EP3643205A4 (fr) * 2017-06-20 2020-10-21 Kokuyo Co., Ltd. Chaise
EP3643203A4 (fr) * 2017-06-20 2020-11-11 Kokuyo Co., Ltd. Chaise
US11096495B2 (en) 2017-06-20 2021-08-24 Kokuyo Co., Ltd. Chair
US11103069B2 (en) 2017-06-20 2021-08-31 Kokuyo Co., Ltd. Chair
JP2019037383A (ja) * 2017-08-23 2019-03-14 コクヨ株式会社 椅子

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