EP3217845A1 - Wippmechanik und stuhl mit wippmechanik - Google Patents
Wippmechanik und stuhl mit wippmechanikInfo
- Publication number
- EP3217845A1 EP3217845A1 EP15791505.9A EP15791505A EP3217845A1 EP 3217845 A1 EP3217845 A1 EP 3217845A1 EP 15791505 A EP15791505 A EP 15791505A EP 3217845 A1 EP3217845 A1 EP 3217845A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- spring elements
- chair
- spring
- rocking mechanism
- 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
Links
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 mounted in a rigid frame
- A47C3/026—Rocking chairs with seat, or seat and back-rest unit, elastically mounted in a rigid frame with a 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
- A47C7/36—Supports for the head or the back
- A47C7/40—Supports for the head or the back for the back
- A47C7/44—Supports for the head or the back for the back with elastically-mounted frame
- A47C7/448—Supports for the head or the back for the back with elastically-mounted frame with resilient blocks
Definitions
- the invention relates to a rocking mechanism for a chair, in particular an office chair according to the preamble of claim 1. Furthermore, the invention relates to a chair, in particular an office chair with the features of claim 15.
- the invention relates to a tilt mechanism for chairs, as they are used in particular as office chairs.
- Such an office chair typically has a foot portion with which the chair stands up on the floor.
- the foot can, for example, be equipped with fixed foot elements or with rollers for moving the foot part on a substrate.
- the seat is arranged substantially horizontally so that a person can sit on this seat.
- the chair still on a backrest and / or one or two-sided arranged armrests.
- the seat is arranged rotatably relative to the foot part about a vertical axis of rotation.
- the central support element can be designed to be height adjustable.
- an adjustable gas spring is often used. This serves on the one hand for height adjustment and on the other hand, at least partially for damping or suspension in the vertical direction, for example, when a person sits down on the seat.
- the seat surface can be equipped with a tilt mechanism which sets the seat surface in relation to the seat surface
- the seat can be inclined relative to the foot part, preferably by a few degrees.
- Corresponding office chairs are known in which such a one-dimensional inclination of the seat in the direction of the user, so viewed from this forward or backward is possible. This usually serves a corresponding pivot axis.
- an additional inclination to the sides through a second pivot axis can be made possible. In this case, this is called a 3D rocker.
- the seat is in the unloaded or centrally loaded state in this typically central neutral position.
- a person located on the seat by tilting the weight of the seat side or tilt forward or backward, preferably starting from the neutral position.
- the upper bearing part serves for connection to a seat surface for a person and the lower bearing part for connection to the foot part for setting up the chair on a substrate.
- the bearing parts are tilted relative to each other in a predetermined angular range by shifting the weight of the person.
- the known rocking mechanisms are equipped with metal springs for adjusting the neutral position. This leads to a comparatively static and, especially with prolonged use to usually stiff and noisy movements of the spring elements.
- the object underlying the invention is to provide a Wippmechanik that eliminates the disadvantages of the prior art.
- the new rocker mechanism should enable a noise-free and smooth operation even with long service life.
- a Wippmechanik with the features of claim 1 solves this problem.
- the bearing parts have mutually correspondingly curved bearing shells for mutual storage. This means that both the upper bearing part and the lower bearing part each have a corresponding bearing shell.
- These bearing shells are curved in a manner corresponding to one another, ie they essentially have an identical curvature.
- the bearing shells are formed identically at least with respect to the curvature. This allows a smooth and quiet adjustment or inclination of the seat against the foot. Physical pivot axes are preferably not provided.
- the Wippmechanik is characterized in that the bearing shells are spherical shell-shaped relationship meadow formed as spherical shells sections.
- a spherical shell is a section of a spherical surface.
- a spherical shell section or a spherical shell therefore does not designate a complete sphere, but only a part of it.
- such a spherical shell section is significantly smaller than a hemisphere here. Since a sphere has an identical curvature at all points of the spherical shell, bearing shells with the same curvature or with the same ball diameter can abut one another over the entire surface. Thus, an optimal storage is achieved.
- the bearing shells are annular or ring-shaped. Accordingly, they preferably have an annular cross-section.
- the bearing shell comprises a circumferential, closed edge on the one hand and a free, central region on the other. If the bearing shells are spherical shell sections or similarly curved surfaces, the circumferential annular section is correspondingly curved.
- the bearing shells are preferably arranged displaceable relative to one another.
- a relative inclination of the bearing parts to each other is made possible.
- this movement can be describe by a pivot about an axis of rotation, which is arranged at the center of curvature.
- the movement therefore runs in all directions along identically curved paths.
- a plurality of virtual pivoting or pivoting axes may need to be considered.
- a plurality of spring elements are provided. These serve to mediate a spring action and / or damping against a relative inclination of the bearing parts to each other.
- the spring elements serve to generate an opposing spring action in deflections from the neutral position or inclinations of the bearing parts. This spring effect should preferably serve to return the bearing parts back to the neutral position.
- pairs of opposing spring elements are provided, in particular with respect to the center of the bearing and the bearing shells or the vertical axis. More preferably, an even number of spring elements is provided, preferably four or eight spring elements. More preferably, the spring elements are arranged in pairs as opponents. This means, in particular, that springs rebound of one of the spring elements whose opponent and vice versa. Thus, a bilateral suspension can be ensured.
- the opponents are preferably arranged opposite each other.
- the spring elements preferably all spring elements have an identical spring action and / or damping.
- individual spring elements or even all spring elements may have different spring action and / or damping. This means, that a different strength spring action and / or damping can be adjusted in particular for individual directions of movement. This can preferably be ensured both by insertion and subsequently by replacing individual or even all spring elements. This can be provided in each direction of movement a certain, possibly different spring action and / or damping.
- the spring elements are in particular formed as a hollow body. Preferably, they have a deformable wall. Thus, an elastic effect of the spring elements is achieved.
- the spring elements are cylindrical, more preferably as a hollow cylinder.
- the spring elements are designed as elastomer springs or elastomer spring elements.
- Elastomeric springs are characterized by permanent elasticity of linear spring action and low manufacturing costs.
- elastomer springs avoid in particular the usual noise development of metallic spring elements.
- the bearing portion of the lower bearing part is provided with a central receptacle, preferably in the manner of a projection.
- This receptacle is preferably used for fastening a vertical element or a corresponding connecting element arranged on the foot part.
- a vertical element or part thereof may preferably serve a gas spring.
- the central receptacle has a round cross-section, a rotation of the seat against the foot part about a vertical axis of rotation can already be ensured.
- the bearing section of the upper bearing part has in particular a central opening for receiving the central vertical element of the foot part or the central receptacle and / or the associated projection of the lower bearing part.
- the vertical element may in particular include a gas spring.
- the breakthrough is required to attach the upper bearing part to the lower bearing part, if a central bearing of the seat is to be provided, such as by means of a gas spring.
- the upper bearing part preferably surrounds the lower bearing part at least in part.
- the bearing portion of the upper bearing part is supported by means of a pressure washer on the lower bearing part.
- the pressure disk is preferably annular.
- the thrust washer is annular to be disposed about the central receptacle on the lower bearing member.
- a circumferential groove or the like is provided, in which the thrust washer is inserted.
- At least one sliding element is arranged between the bearing shells and / or between the bearing shell of the upper bearing section and the thrust washer.
- a sliding element may, for example, be a foil, a pane or the like, which is produced in particular from a low-friction material.
- it may be a Teflon element or the like.
- an actuating device for a height adjustment of the chair is provided.
- a gas spring arranged in the region of the foot part or of the central vertical element is used.
- Such a gas spring can be used on the one hand for height adjustment and on the other hand for partial damping.
- the actuating device is preferably hebeiförmig and / or annular.
- an actuating arm is used to actuate a release button of the gas spring.
- a handling handle region is provided at the other end region of the actuating device.
- the actuating device is preferably triggered by a vertical movement upwards or downwards.
- a corresponding axis of rotation can be provided for the actuating device.
- a chair in particular an office chair or swivel chair with the features of claim 15.
- This chair preferably has a seat for a person and a foot for placing on a substrate.
- the seat is movably connected to the foot part in a limited angular range relative to one another.
- the chair is characterized in that a rocking mechanism according to the above description is provided for the movable connection of the seat surface to the foot part. Accordingly, the above descriptions of the rocking mechanism are applicable in combination with the described chair.
- the chair 10 as an office or swivel chair is characterized by a rocking mechanism 11 according to the invention.
- This rocking mechanism 11 is arranged below a seat surface 12 for connection to a foot part 13 of the chair 10. Between the rocking mechanism 11 and the actual foot part 13, however, a vertical element 14 is still arranged.
- the vertical element 14 has a gas spring 15 in the interior.
- actuating lever 16 For actuation or height adjustment of the gas spring 15 is an actuating lever 16 below the seat 12 in the field of Wippmechanik 11 provided.
- the gas spring-side end portion 19 of the operating lever 16 In an upward movement of the operating lever 16 at the outside end portion by engagement of a user, the gas spring-side end portion 19 of the operating lever 16 is moved downwards due to the lever axis 18, so that the control knob 17 is depressed. This leads to a release of the gas spring 15, which can freely expand at low weight load on the chair 10. In a typical load with a person, however, the gas spring 15 is compressed, so that the rocking mechanism 11 moves downwards with the seat surface 12.
- an actuating ring (not shown here) can be provided.
- a circumferential ring is disposed below the seat surface 12. This ring can also be actuated by an upward or downward movement of the corresponding control knob 17 of the gas spring 15.
- the chair 10 here also has a backrest 19, which is fastened to the seat surface 12.
- a backrest 19 which is fastened to the seat surface 12.
- no further elements, such as armrests or the like are provided. These can however be added if necessary.
- Both the seat 12 and the backrest 19 each have a padding 20. This serves to increase the convenience for a user of the chair 10, so a person sitting on it.
- the foot part 13 has in the illustrated embodiment 5 of a central region projecting arms 21. These arms 21 serve to achieve a secure state of the chair 10 on a substrate.
- rotatable rollers 20 about vertical axes can be arranged, with the seat surface 12 screwed on the underside.
- the lower bearing part 24, however, is placed on the upper portion of the vertical life 14 in the form of the housing of the gas spring 15.
- the glass spring 15 and the vertical element 14 has at the upper portion corresponding to an outer shape, which corresponds to the interior of an associated receptacle 26 of the lower bearing part 24.
- this is a round cross-section. In principle, however, other cross sections may be conceivable.
- a round cross section offers the advantage that the seat surface 12 can already be rotatable relative to the vertical element 14 thereby.
- the upper bearing part 23 is formed as a housing 27, that the lower bearing part 24 receives inside it. Accordingly, the upper bearing part 23 substantially encloses the lower bearing part 24.
- the actual storage of the two bearing parts 23, 24 to each other is completed by two so-called cups 28 and 29.
- the first bearing shell 28 is formed on the housing 27 of the upper bearing part 23 at. In principle, however, this bearing shell 28 can also be designed as a separate part that is connected in a different way to the upper bearing part 23. In any case, the bearing shell 28 is formed as a spherical shell-shaped element. This means that the bearing shell 28 has a shape or curvature which corresponds to a section of a spherical surface.
- the lower bearing part 24 also has an integrally formed bearing shell 29.
- the bearing shell 28 is formed as part of the lower bearing part 24. Specifically, here the lower wall is formed as a bearing shell 29. However, a second bearing shell 32 is still provided, which actually serves as a support for the upper bearing part 24. Therefore, the bearing shell 29 could indeed be omitted in principle. But it serves as an investment and to secure storage upwards.
- the shape and curvature of the bearing shells 29 and 32 essentially correspond to those of the bearing shell 28. In other words, the radii of curvature of the respectively associated spherical surfaces also correspond. It is ensured that the two bearing notes 28 and 29 always create an optimal manner to each other within the intended movement-dependent inclination range. An optimal power transmission is guaranteed. Since the upper bearing part 23 practically completely surrounds the lower bearing part 24, the bearing shell 28 is arranged below the bearing shell 29. In order to allow the two bearing paper 28 and 29 as fully as possible abut against each other and to provide support for the upper bearing part 23 on the lower bearing part 24 via the bearing shell 32, therefore, a thrust washer 30 is provided. This thrust washer 30 is placed on the projection 31 of the lower bearing part 24 and secured thereto. For this purpose, a circumferential groove 36, in which the pressure plate 30 is inserted.
- a bearing shell 32 is additionally provided as a lower bearing element. Accordingly, the bearing shell 28 rests on the lower bearing shell 32, which has fallen over the thrust washer 30 on the projection 31. At the top, the bearing shell 28 is formed adjacent to the upper bearing shell 29. This upper bearing shell 29 is part of the lower bearing part 24 and does not have to be explicitly designed as a bearing shell.
- this opening 33 is usually formed as a circular opening.
- the opening 33 has a larger cross-section than the projection 31. Accordingly, gaps 34 are laterally in the area between the bearing shells 28, 29 and 32 and the projection 31 is present. These gaps 34 allow a lateral pivoting movement by displacement of the upper bearing part 23 relative to the lower bearing part 24. The pivoting movement is limited by a stop of the bearing shell 28 laterally to the projection 31 on one side. Since the area around the projection 31 including the bearing shells 28, 29 and 32 is circular and thus point-symmetrical to the center, an inclination in each spatial direction is possible.
- spring elements 35 are still provided, which are formed in the embodiment shown as elastomer springs or elastomeric spring elements.
- the elastomer springs or spring elements 35 serve to hold the two bearing parts 23 and 24 in the mentioned, in particular central, neutral position.
- the spring elements 35 under bias between the upper bearing part 23, the lower bearing part 24 is inserted. This ensures that in symmetrical construction of the spring elements 35, a substantially central neutral position is taken. Accordingly, the circumferential gap 34 is formed with a constant cross section.
- a total of eight spring elements 35 are provided.
- the spring elements 35 are arranged distributed around the circumference of a circular inner region of the tilt mechanism 11. This ensures that each tilting movement of the rocking mechanism 11 is distributed to one or more of the spring elements 35. To the extent that one of the spring elements 35 is loaded, a correspondingly opposite spring element 35 is relieved. According to the setting of the bias of the spring elements 35 already the strength of the spring action can be adjusted.
- the spring effect is adjusted primarily by the choice of material and the shape of the spring elements 35.
- identical spring elements 35 may be used all around.
- individual directions can be reinforced or weakened by more or less elastic spring elements 35 in the spring action.
- identical spring elements 35 should be used on the sides, as a rule, a different thickness of the spring elements 35 can be provided forwards and backwards due to the different desired spring effect.
- a different thickness of the spring elements 35 can be provided forwards and backwards due to the different desired spring effect.
- elastomer springs as spring elements 35 will be formed as a rule, as a cylindrical hollow body. Accordingly, they have a circumferential wall, which can be deformed when force in the vertical direction. The wall will accordingly be deformed into a less bulbous shape, depending on the applied force. Upon discharge of one of the spring elements 35, the stored energy is then released elastically again. This leads to a return movement of the two bearing parts 23 and 24 in the direction of their neutral position.
- spring elements 35 may be provided.
- elastomeric springs are preferable to, for example, metallic springs, since accordingly noise and other difficulties caused by these are avoided.
Landscapes
- Chairs Characterized By Structure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102014116392.3A DE102014116392A1 (de) | 2014-11-11 | 2014-11-11 | Wippmechanik und Stuhl mit Wippmechanik |
| PCT/EP2015/002249 WO2016074784A1 (de) | 2014-11-11 | 2015-11-10 | Wippmechanik und stuhl mit wippmechanik |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3217845A1 true EP3217845A1 (de) | 2017-09-20 |
| EP3217845B1 EP3217845B1 (de) | 2018-09-26 |
Family
ID=54478700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP15791505.9A Not-in-force EP3217845B1 (de) | 2014-11-11 | 2015-11-10 | Wippmechanik und stuhl mit wippmechanik |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3217845B1 (de) |
| DE (1) | DE102014116392A1 (de) |
| WO (1) | WO2016074784A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020089529A1 (en) * | 2018-10-31 | 2020-05-07 | Easydoing Oy | A swing support device for a chair |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016217992A1 (de) | 2016-09-20 | 2018-03-22 | VS Vereinigte Spezialmöbelfabriken GmbH & Co. KG | Sitzmöbel |
| US11969094B2 (en) | 2019-06-11 | 2024-04-30 | MillerKnoll, Inc. | Chair |
| DE102020101033B4 (de) | 2020-01-17 | 2025-05-22 | Bock 1 Gmbh & Co. Kg | Träger für ein Sitzmöbel |
| DE102020116642A1 (de) * | 2020-06-24 | 2021-12-30 | Aeris Gmbh | Stuhl bzw. ein Gelenksystem für einen Stuhl oder eine Sitzvorrichtung |
| USD970912S1 (en) | 2020-12-18 | 2022-11-29 | MillerKnoll, Inc. | Chair |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1426292A (fr) * | 1964-12-07 | 1966-01-28 | B I M | Support de siège |
| NL1017456C2 (nl) * | 2001-02-27 | 2002-08-29 | Robertus Hendrikus Veldhoven | Zitstoel of zitkruk. |
| DE202006019708U1 (de) * | 2006-12-28 | 2007-04-26 | Plath, Johannes, Prof. Dr. med. | Neigungsmechanik für eine Sitzfläche |
| DE202009011789U1 (de) * | 2009-08-28 | 2009-12-31 | Müller, Gerhard | Sitzträger für Sitzmöbel und Stehhilfen für ergonomische-dynamisches Sitzen |
| DE102010047323B4 (de) * | 2010-10-01 | 2015-12-31 | Sandra Schlöffel | Sitzlagerung |
-
2014
- 2014-11-11 DE DE102014116392.3A patent/DE102014116392A1/de not_active Withdrawn
-
2015
- 2015-11-10 WO PCT/EP2015/002249 patent/WO2016074784A1/de not_active Ceased
- 2015-11-10 EP EP15791505.9A patent/EP3217845B1/de not_active Not-in-force
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020089529A1 (en) * | 2018-10-31 | 2020-05-07 | Easydoing Oy | A swing support device for a chair |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016074784A1 (de) | 2016-05-19 |
| DE102014116392A1 (de) | 2016-05-12 |
| EP3217845B1 (de) | 2018-09-26 |
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