EP4000464A1 - Mécanique pivotante - Google Patents

Mécanique pivotante Download PDF

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Publication number
EP4000464A1
EP4000464A1 EP21020542.3A EP21020542A EP4000464A1 EP 4000464 A1 EP4000464 A1 EP 4000464A1 EP 21020542 A EP21020542 A EP 21020542A EP 4000464 A1 EP4000464 A1 EP 4000464A1
Authority
EP
European Patent Office
Prior art keywords
support
seat
pivoting
energy storage
mechanical component
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
EP21020542.3A
Other languages
German (de)
English (en)
Other versions
EP4000464B1 (fr
Inventor
Hermann Bock
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.)
Bock 1 GmbH and Co KG
Original Assignee
Bock 1 GmbH and Co KG
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Publication date
Application filed by Bock 1 GmbH and Co KG filed Critical Bock 1 GmbH and Co KG
Publication of EP4000464A1 publication Critical patent/EP4000464A1/fr
Application granted granted Critical
Publication of EP4000464B1 publication Critical patent/EP4000464B1/fr
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs

Definitions

  • the invention relates to a swivel mechanism for seating furniture, in particular an office chair.
  • the invention relates to a synchronous mechanism for a correlated seat-backrest movement of a piece of seating furniture, in particular an office chair, with a base support that can be placed on a chair column, a seat support and a backrest support.
  • synchronous mechanism is understood to mean assemblies in the seat substructure of a piece of seating furniture, in particular an office chair, which ensure coupled kinematics that bring about a specific relative movement of the seat and backrest to one another.
  • the seat of the piece of seating furniture which is usually provided with an upholstered seat, is mounted on the seat support.
  • the backrest support which extends backwards in the usual way from the actual synchronous mechanism, supports the backrest of the seating furniture item on an extension arm running upwards.
  • Such self-adjusting synchro-mechanisms are not only often constructed in a comparatively complicated manner, they consist of a A large number of interacting components and/or are complex to assemble, but often also require a comparatively large amount of space.
  • One object of the present invention is to provide a pivoting mechanism that is structurally particularly simple and requires little installation space. This object is achieved by a swivel mechanism according to claim 1 or a piece of seating furniture according to claim 10.
  • Advantageous embodiments of the invention are specified in the dependent claims. The advantages and configurations explained below in connection with the pivoting mechanism also apply analogously to the seating furniture according to the invention and vice versa.
  • the pivoting mechanism according to the invention for seating furniture which is in particular a synchronous mechanism for a correlated movement of the seat and backrest of an office chair, has a number of interacting mechanical components, through which interaction at least one of these mechanical components can be pivoted from an initial position into a pivoted position.
  • the pivoting mechanism has at least one elastically deformable energy storage element for determining a pivoting resistance of this at least one mechanical component when it is pivoted out of its initial position and/or for providing a restoring force for this at least one mechanical component when it is pivoted out of its initial position.
  • the Pivoting mechanism is characterized in that the at least one energy storage member is formed in one piece with one of the mechanical components and is operatively connected to another mechanical component.
  • a core idea of the invention is to provide at least one integral, elastically deformable element, i.e. one integrated into a component of the pivoting mechanism, which serves as an energy storage element.
  • This energy storage element is also referred to below as a "deformation element”.
  • the deformation element provides a counteracting force in the opposite direction to a functional deformation, e.g. a deflection.
  • the deformation element is preferably the only energy-storing component of the pivoting mechanism.
  • the at least one deformation element is preferably connected, in particular at one end, to a first mechanical component, which is preferably a non-pivotable mechanical component.
  • the deformation element is supported, in particular with its other end, on a second mechanical component, which is preferably a pivotable mechanical component.
  • This support preferably takes place in such a way that pivoting a pivotable mechanical component out of its initial position causes a deformation of the at least one deformation element, the mechanical component that is pivoted preferably being the mechanical component on which the deformation element is supported.
  • a part of a mechanical component that is already present to provide the functionality of the pivoting mechanism is used as an energy storage element.
  • the at least one deformation element is preferably provided on the base support of the pivoting mechanism, that is to say it is connected to it in one piece.
  • pivoting mechanism In this way, the number of components required for the pivoting mechanism and thus the manufacturing and assembly costs can be reduced, while the seating and pivoting behavior of the seating furniture item that the user is used to can be retained.
  • structural design of the pivoting mechanism is simplified. Further advantages result from new construction and design approaches, which are made possible with the integrated construction. Since no separate energy storage element is required, for example in the form of a spring element made of steel, pivoting mechanisms can be provided which require significantly less installation space. In particular, significantly flatter built mechanisms can arise.
  • the deformation element can preferably be deformed as a result of the pivoting mechanism being acted upon, which is aimed at achieving a movement of the pivoting mechanism.
  • the deformation element is preferably deformable due to an action on the pivot mechanism aimed at achieving a pivoting movement of the pivot mechanism, in particular an action on another component of the pivot mechanism, in particular the seat support and/or the backrest support.
  • the at least one deformation element preferably deforms when the pivoting mechanism is specifically subjected to a force or a moment.
  • the at least one deformation element is thus preferably characterized in that its deformation is directed towards an intended and thus desired movement of the pivoting mechanism into which it is integrated.
  • the at least one deformation element preferably consists of a plastic material. If the base support consists of a plastic material and the deformation element is connected in one piece to the base support, then the same plastic material is preferably used for the production of the base support supplemented with the deformation element. Since plastic materials have long been used in the manufacture of seating furniture components, particularly office chair components, suitable devices and equipment for manufacture and assembly already exist. In this regard, therefore, no conversion is required. A suitable deformation element only has to be formed on the base support, for example by using a suitable injection mold.
  • An injection molding process is preferably used in the production of that mechanical component which has the deformation element.
  • the deformation element can then be produced in a single operation with the relevant mechanical component, saving time and money.
  • either only a single plastic material is used or two or more different plastics are used (Multi-component injection molding). It is not necessary to change the material composition during injection molding if the desired deformation properties of the deformation element can only be achieved by a suitable structural design.
  • the material suitable for producing the deformation element preferably has the necessary rigidity on the one hand to ensure the required stability and strength of the component. On the other hand, the material is elastic enough to provide the desired deformability with the desired movement.
  • component-integrated deformation elements made of plastic material are used instead of spring elements or energy storage elements made of steel, the weight of the device can be reduced compared to conventional designs. This is particularly advantageous in the case of seating furniture if it is intended for mobile installation, as is the case with office chairs. At the same time, the recycling of such assemblies is simplified since there is no need to separate the materials.
  • the deformation element according to the invention is preferably an element which can be deformed essentially exclusively as a result of bending.
  • the deformation element is preferably not deformable due to tension, pressure or torsion.
  • a pivoting movement of the backrest support and seat support backwards and forwards, seen in the longitudinal direction of the seat, is preferably the preferred direction of movement, which is supported and/or made possible by the deformation element.
  • the type of deformation can be defined and used in a targeted manner to provide a desired movement of a part involved, in particular a mechanical component.
  • the deformation element serves at the same time as an energy storage element, which is integrated in the mechanical component providing the deformation element, in particular the base support.
  • the deformation element can thus not only define a restoring force for a pivoted mechanical component, here preferably for the backrest support or for a seat support-backrest support assembly of the pivoting mechanism designed to carry out a synchronous movement, but also serves to determine a pivoting resistance of this mechanical component.
  • the deformation element undergoes a reversible deformation under the influence of the load.
  • the elasticity of the deformation element causes a restoring moment when it is acted upon, by which it automatically moves back into its non-deformed initial shape as soon as the forces or moments acting on it cease to exist.
  • the invention is preferably used in a pivoting mechanism in which pivoting a backrest support backwards induces a subsequent movement of a seat support.
  • the deformation element according to the invention can be used in many different ways. Although the principle on which the invention is based is explained below using the example of a synchronous mechanism for an office chair, in which part of the base support is designed as a deformation element, the invention is not limited to use in a synchronous mechanism, nor to the fact that it is the deformation element is a part of the base support. The idea of the invention can also be realized with the help of deformable parts of other structural elements or assemblies of chair mechanisms. These chair mechanisms can also be synchronous, asynchronous or tilting mechanisms or other types of chair mechanisms.
  • Front or “front” means that a component is arranged at the front in the longitudinal direction of the seat or refers to a component extending in the direction of the front edge of the seat or pointing in this direction
  • rear or “rear” means that a component is arranged at the rear in the longitudinal direction of the seat or refers to a component that extends in the direction of the backrest or the backrest support or the rear edge of the seat or points in this direction component.
  • the information “above” or “upper” or “higher” and “below” or “lower” or “deeper” refers to the intended use of the office chair or the office chair mechanism.
  • a pivoting mechanism 10 is shown in a greatly simplified manner to illustrate the pivoting principle.
  • the entire pivoting mechanism 10 is constructed mirror-symmetrically with respect to its central longitudinal plane as far as the actual kinematics are concerned. In this respect, the following description is generally based on construction elements that are present in pairs on both sides.
  • the swivel mechanism 10 is a synchronous mechanism.
  • the term synchronous mechanism is understood to mean assemblies of office chairs that ensure kinematics that are coupled to one another and bring about a specific relative movement of the seat backrest 29 and backrest 30 to one another.
  • the seat support 3 and the backrest support 4 are coupled in an articulated manner in such a way that a backward pivoting movement of the backrest 30--as can be caused, for example, by the chair user leaning against the backrest 30--induces a movement of the seat 29. Seating comfort is increased with such a correlated seat-backrest movement.
  • the three main components of the mechanism namely base support 1, seat support 3 and backrest support 4, are coupled to one another via swivel joints in such a way that a backwards pivoting movement of backrest support 4 in pivoting direction 7 induces a synchronous subsequent movement of seat support 3, while base support 1 remains stationary and immobile.
  • the base support 1 is by means of a Cone recording 2 set on the upper end of a chair column 20.
  • the substantially frame-shaped seat support 3 is provided for receiving or mounting a seat 29, which can be upholstered. The assembly is done with the help of fasteners not shown in the usual way.
  • the backrest 30, which is height-adjustable in modern office chairs, is attached to the backrest support 4.
  • the backrest 30 can also be connected in one piece to the backrest support 4 .
  • the central base support 1 serving as the inner element is arranged within the frame-shaped seat support 3 serving as the outer element in such a way that a particularly compact, in particular flat, pivoting mechanism 10 results, which requires very little installation space.
  • the backrest support 4 is directly articulated with its cheeks 5 arranged on both sides of the base support 1 to form a transverse axis 11 with the base support 1 . Both cheeks 5 extend forward beyond the position of the transverse axis 11 in the longitudinal direction 25 of the seat and end in lever arms 6 , the ends of which are articulated on the seat support 3 .
  • the backrest support 4 forms a rear coupling element 15 integrated into the backrest support 4 with the articulation of its cheeks 5 to the base support 1 on the one hand and the rear area 27 of the seat support 3 on the other hand.
  • a central front coupling element 16 connects the base support 1 to the front region 26 of the seat support 3.
  • each swivel joint being assigned a transverse axis 11, 12, 13, 14. These are the first pivot joint 21 for connecting the base support 1 to the rear coupling element 15, the second pivot joint 22 for connecting the rear coupling element 15 to the seat support 3, the third pivot joint 23 for connecting the base support 1 to the front coupling element 16 and the fourth Swivel joint 24 for connecting the front coupling element 16 to the seat support 3.
  • the base support 1 has a central base body 28 which includes, among other things, the conical receptacle 2 for the chair column 20 and in which the main pivot axis 11 of the pivot mechanism 10 runs.
  • a part of the base support 1, namely a deformation element 8 integrated into the base support 1 and forming a longitudinal section of the base support 1, is elastically deformable.
  • the deformation element 8 extends, following the extension of the base support 1, in the longitudinal direction 25 of the seat.
  • the front end (free end) 17 of the deformation element 8 lies freely on a part of the seat support 3, more precisely on a continuous transverse axis 14 which is provided for articulating the front coupling element 16 on the seat support 3.
  • the plate-shaped deformation element 8 in the exemplary embodiment described here is designed in one piece with the base body 28 , ie it is connected to the base body 28 with its other end (fixed end) 18 . More precisely, this is Deformation element 8 is made in one piece with the base body 28 .
  • the deformation element 8 lying above the front coupling element 16 occupies almost the entire width of the interior space 31 provided by the frame-shaped seat support 3 , just like the front coupling element 16 itself.
  • the deformation element 8 is designed to be deformable at least in sections.
  • the deformation element 8 is designed to be deformable in the longitudinal direction 25 of the seat and is deformed in the longitudinal direction 25 of the seat due to the stresses acting in this direction when the seat support 3 moves out of its basic position when the backrest support 4 pivots. To put it more precisely, the free end 17 of the deformation element 8 is carried along in the pivoting direction 7 . As a result, it bends in the pivoting direction 7, with the contact point 19 of the deformation element 8 on the seat support 3 changing.
  • the deformation element 8 in the form of the deformable part of the otherwise non-deformable base support 1 also serves as an energy storage element integrated into the base support 1 .
  • the deformation element 8 thus not only defines the restoring force for the backrest support 4 but also determines the pivoting resistance of the backrest support 4 .
  • the deformation element 8 serving as a restoring element is designed and arranged in such a way that it is acted upon when the backrest support 4 pivots, the backrest support 4 always pivots against the spring force of the deformation element 8 and the deformation element 8 serves to reset the backrest support 4 from an inclined position position to its starting position.
  • the seat support 3 When the backrest support 4 is pivoted, the seat support 3 can be moved relative to the stationary base support 1 in that the seat support 3 is mechanically contacted by the backrest support 4 and is guided away from the base support 1 with deformation of the deformation element 8 .
  • the backrest support 4 pulls the seat support 3 from a starting position in which the base support 1 is located in the receiving space 31 defined by the seat support 3 in such a way that the base support 1 is surrounded on all sides by the seat support 3 and not over the top of the seat support 3 protrudes into a pivoting position in which the seat support 3 is lifted off the base support 1 at least to such an extent that the upper side of the seat support 3 is in a higher position than the starting position, so that the fixed base support 1 accommodates the receiving space 31 of the seat support 3 leaves at least partially. In this way, both the front area of the seat support 3 and the rear area of the seat support are raised relative to the starting position.
  • the pivoting mechanism described ensures that the backrest support 4 can be pivoted with the backrest 30 about the main pivot axis 11 in the pivoting direction 7 backwards and downwards. Due to the articulation of the seat support 3 to the backrest support 4, the seat support 3 is also carried backwards.
  • Pivoting the backrest support 4 backward causes the seat support 3 to be raised according to the movement curve defined by the interaction of the backrest support 4 , base support 1 and seat support 3 .
  • the pivoting movement of the backrest support 4 also induces a lifting movement of the seat support 3.
  • a Pivoting the backrest support 3 backwards in the pivoting direction 7 results in a direct lifting movement of the rear area 27 of the seat support 3 and at the same time a direct lifting movement of the front area 26 of the seat support 3.
  • the front area 26 of the seat support 3 is raised more than the rear area 27
  • the base support 1 itself remains stationary when the backrest support 4 is pivoted.
  • the seat support 3 is not only raised in its rear area 27, but that the front area 26 of the seat support 3 is also raised at the same time, means that the seat support 3 is carried along synchronously in a defined relationship to the backrest support 4 backwards and upwards. Since the user sitting on the seat 29 performs a movement that reproduces the movement of the backrest 30 when the backrest 30 is pivoted into a rear position, the so-called "shirt-pulling effect" is prevented particularly effectively.
  • the desired movement of the pivoting mechanism 10, in particular the manner of the pivoting movement can be influenced in a defined manner in that the deformation behavior of the deformation element 8 is specified in a targeted manner.
  • the desired deformation behavior which differs in sections, is brought about, for example, by design measures, such as different material thicknesses, and/or by the targeted use of materials with different deformation properties.
  • the deformable section of the deformation element 8 extends essentially over the entire length of the deformation element 8.
  • the deformation element 8 is more rigid in the area of its fixed end 18 than in the area of its free end 17.
  • the deformation element 8 is preferably designed in such a way that the rigidity of the entire deformation element 8 changes continuously.
  • the changing course of rigidity results solely from a change in the material thickness of the deformation element 8 .
  • the material thickness of the deformation element 8 Starting from the fixed end 18 , the material thickness of the deformation element 8 and thus at the same time its rigidity continuously decreases in the direction of the free end 17 .
  • the embodiment of the deformation element 8 described here is preferably selected in such a way that the properties of its deformation are independent of whether an increasing or decreasing application of a force or moment takes place.
  • the deformation resistance of the deformation element 8 and thus the pivoting resistance of the pivoting mechanism 10 does not depend on whether the backrest support 4 pivots backwards and thus the deformation element 8 is charged as an energy store, or whether the backrest support 4 pivots forwards back into its original position . In both cases, the deformation element 8 moves on the same path.
  • the deformation element 8 is designed as a beam or plate.
  • the deformation element 8 is designed in the manner of a leaf spring. It has a rectangular cross-sectional profile.
  • the deformation element 8 can be constructed in such a way that, in the case of a load, stress occurs either only in compression or only in tension. This can be achieved, for example, by constructing the deformation element 8 in several parts (not shown), e.g. in the form of a combination of several elements acting in parallel, or by using a one-part deformation element 8, as shown in the figures. has a suitable internal construction or a suitable internal structure (not shown) in order to be able to react to forces acting from different directions with a different deformation behavior.
  • the swivel mechanism 10 to be provided is subject to cyclic loading and for this reason must withstand up to several hundred thousand load changes. To ensure fatigue strength, the loss of force (relaxation) that occurs under deformation must be limited. This is preferably achieved in that the pivoting mechanism 10 is not exposed to any permanent and high preload.
  • a swivel mechanism 10 which has a deformation element 8 according to the invention, is constructed in such a way that no significant prestressing of the Deformation element 8 is required. In any case, the prestressing of the deformation element 8 is so low in all variants according to the invention that no relaxation of the deformation element 8 takes place, which would impair the functionality.
  • the pivoting mechanism 10 is constructed as a so-called "self-adjusting" mechanism in which the weight of the user sitting on the chair counteracts the pivoting movement.
  • the user of the chair lifts himself up by loading the backrest 30 by working against his own weight resting on the seat 29 when actuating the chair mechanism 10 by pushing back the backrest 30 .
  • the desired pivoting resistance is thus adjusted almost automatically based on the weight of the user.
  • the user's weight Due to the principle of "self-adjustment", the user's weight generates a sufficiently large torque on the backrest support 4. This torque can be absorbed completely or partially by the deformation element 8 acting as an energy storage member. Therefore, no large preloads are required.
  • the selected position of the pivot points 21, 22, 23, 24 or pivot axes 11, 12, 13, 14 preferably provides a lever geometry required for a self-adjusting mechanism 10, in which, both in the non-pivoted basic position and preferably also in the maximum rear pivoted position, which is arranged transversely to the longitudinal direction 25 of the seat, the main pivot axis 11 of the connection of the backrest support 4 to the base support 1 in the longitudinal direction of the seat 25 seen behind the pivot point 22 of the backrest support 4 is arranged on the seat support 3, ie behind that pivot axis 12 which defines the location of the force application in the seat support 3.
  • stops are preferably provided which act both during a pivoting movement of the backrest support 4 or the seat support 3 into the front and rear end position and when the seat support 3 is acted upon by a user , which leads to a lowering movement of the seat support 3, prevent overloading of the deformation element 8 as force-absorbing elements.
  • stops are preferably provided for absorbing seat loads, ie for absorbing downward movements of mechanical components, as well as stops for limiting the forward and backward movement of mechanical components.
  • Downward movement of the entire pivoting mechanism 10 is typically limited by a gas spring (not shown) built into the chair column 20, which provides a suitable stop.
  • a handle 32 is attached to the base support 1, with the help of which a pivoting lever 33 can be pivoted to trigger the gas spring.
  • Stops are preferably provided which limit a movement of the pivoting mechanism 10 forwards and backwards in such a way that the loads caused by the pivoting movement of the mechanism are not transmitted via the deformation element 8 .
  • Suitable stop surfaces are typically formed on the base support 1, in particular on the upper side of the base body 28.
  • a pivoting mechanism 10 is provided in which the seat support 3 can be moved relative to the preferably fixed base support 1 from a basic position into a rearwardly pivoted pivoted position.
  • the movement of the seat support 3 to the base support 1 takes place with deformation of a deformation element 8 due to the seat support 3 being acted upon by the backrest support 4 which is pivotably mounted on the base support 1.
  • the loading preferably takes place in such a way that the backrest support 4 takes the seat support 3 with it in such a way that it raises it when a user leans against the backrest 30.
  • pivoting mechanism 10 does not have to be in the form of a four-bar linkage, as illustrated in the figures, but can also be in the form of a three-bar linkage, for example, using the technology according to the invention.
  • the invention can also be implemented in the sense of a mechanical reversal, for example in such a way that the deformation element 8 is connected to one of the pivotable mechanical components and is supported on a non-pivotable mechanical component.
  • the deformation element 8 can be connected in one piece with its fixed end to the seat support 3 and can be supported with its free end on the base support 1, thereby also deforming as an energy storage element when the seat support 3 is carried along by the backrest support 4 when it pivots.
  • the invention relates to a pivoting mechanism 10 for seating furniture, in particular an office chair.
  • the invention relates to a synchronous mechanism for a correlated seat-backrest movement of a piece of seating furniture, in particular an office chair, with a base support 1 that can be placed on a chair column 20, a seat support 3 and a backrest support 4 requires little installation space, it is proposed that at least one elastically deformable energy storage element 8 be designed in one piece with one of the mechanical components 1, 3, 4.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
EP21020542.3A 2020-11-11 2021-11-03 Mécanique pivotante Active EP4000464B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020129708.4A DE102020129708A1 (de) 2020-11-11 2020-11-11 Schwenkmechanik

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Publication Number Publication Date
EP4000464A1 true EP4000464A1 (fr) 2022-05-25
EP4000464B1 EP4000464B1 (fr) 2023-07-26

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EP21020542.3A Active EP4000464B1 (fr) 2020-11-11 2021-11-03 Mécanique pivotante

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0889359A (ja) * 1994-09-22 1996-04-09 Inoue Assoc:Kk 椅子の座板と背もたれの揺動機構
EP1989963A1 (fr) * 2007-05-07 2008-11-12 Provenda Marketing AG Siège doté d'une assise et d'un dossier
DE102013005861A1 (de) * 2013-04-08 2014-10-09 Burkhard Schmitz Mechanikbaugruppe für einen Stuhl und Stuhl mit einer derartigen Mechanikbaugruppe
US20200085194A1 (en) * 2018-09-17 2020-03-19 Sedus Stoll Ag Chair,Particularly Conference or Office Chair, and Method for Manufacturing a Chair

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0889359A (ja) * 1994-09-22 1996-04-09 Inoue Assoc:Kk 椅子の座板と背もたれの揺動機構
EP1989963A1 (fr) * 2007-05-07 2008-11-12 Provenda Marketing AG Siège doté d'une assise et d'un dossier
DE102013005861A1 (de) * 2013-04-08 2014-10-09 Burkhard Schmitz Mechanikbaugruppe für einen Stuhl und Stuhl mit einer derartigen Mechanikbaugruppe
US20200085194A1 (en) * 2018-09-17 2020-03-19 Sedus Stoll Ag Chair,Particularly Conference or Office Chair, and Method for Manufacturing a Chair

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EP4000464B1 (fr) 2023-07-26
DE102020129708A1 (de) 2022-05-12

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