EP3852581A1 - Drehstuhl - Google Patents
DrehstuhlInfo
- Publication number
- EP3852581A1 EP3852581A1 EP19773731.5A EP19773731A EP3852581A1 EP 3852581 A1 EP3852581 A1 EP 3852581A1 EP 19773731 A EP19773731 A EP 19773731A EP 3852581 A1 EP3852581 A1 EP 3852581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- swivel chair
- frame section
- spring
- support
- chair according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
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- 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
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- 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
- A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
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- 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
- A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
- A47C1/03288—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with resilient blocks
-
- 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
- A47C1/033—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest the coupling member being a flexible strip
Definitions
- the invention relates to a swivel chair according to the preamble of the independent claim.
- a seat unit with a kind of synchronous mechanism, where the backrest and seat can move synchronously.
- a seat unit essentially consists of a base, seat and backrest.
- the seat unit of the cited document includes a motion control unit which is attached to the base.
- the motion control unit has a central region and a multiplicity of flexible supports, the flexible supports having end sections which protrude outwards from the central region.
- the flexible supports are flexible in a forward-backward direction, but stiff in a vertical direction.
- the seat is carried by the end sections of four of the flexible supports, while the backrest is connected to the seat via a swivel connection and is supported by the end sections from two further flexible supports.
- the backrest and seat can move synchronously due to the bending of the flexible supports mentioned in a forward-backward direction.
- a disadvantage of this movement-synchronous design is, for example, that the storage of the ends of the flexible supports is quite complex and complicated.
- the published patent application DE 101 15 501 A1 shows a chair for the combined downward and backward movement of the seat.
- a swivel mechanism with guide provided on the chair base.
- the guide has the shape of a support arm structure, the length of which can be changed in order to change the distance between the application part for the swivel mechanism and the fastening part for fastening to the chair base.
- the support arm structure can be designed differently, on the one hand as a coupling gear 9, which includes levers which can be rotated relative to one another, and on the other hand a pair of leaf springs. Both versions show a kind of outward buckling movement, which is associated with the downward and backward movement of the seat.
- EP 0 341 344 A2 shows a piece of seating furniture with devices for synchronously coupled pivoting of the seat and the backrest, which is designed in such a way that pivoting positions of the seat and the backrest can be set in the range between a working position and a rest position by means of an energy store.
- articulated connections are provided on the one hand between a seat support and the seat and on the other hand between the seat support and the backrest, which are formed by rotating-elastic connecting elements in the form of torsion spring elements.
- the torsionally elastic torsion spring elements are designed in the form of bow springs and serve as energy stores.
- the disclosure DE 10 2007 001 194 A1 shows a movement-coupled servo device for a seat part of a chair.
- the servo device is designed as a scissor-shaped articulated lever arrangement, the design being such that when the back part moves with a resulting relatively large longitudinal displacement path of the seat part, there is a short spring travel in the spring force application.
- the seat is guided in the relatively large longitudinal displacement path via a slide guide.
- the object of the invention is to provide a chair, in particular an office chair, with a continuous upholstery surface of the seat and back, which has a minimalist structure.
- a chair with a small number of parts should len can be produced.
- the chair parts should also preferably be easy and inexpensive to manufacture in order to be able to provide an inexpensive chair overall.
- the chair should implement the sequence of movements of a synchronous mechanism, in which the seat inclines downwards when leaning back.
- the aim is to provide an alternative chair, in particular an office chair, which is at the same time inexpensive to manufacture and comfortable to use.
- a swivel chair with a support leg, a frame which defines a seat surface and a backrest surface, the frame comprising a backrest frame section (backrest frame) and a seat frame section (seat surface frame), a base support which carries the frame and which on the support leg is mountable or mounted, on the one hand the base support carries the seat frame section by means of at least two support levers and on the other hand the backrest frame section is pivotally connected to the base support.
- the swivel chair is advantageously characterized in that the two support levers extend from two ends of a spring element which is fastened to the base support and transversely (preferably essentially horizontally transversely) to the swivel chair orientation (ie with respect to the chair orientation in (essentially horizontal) crosswise Direction) springs (or expands and contracts).
- the frame is supported by the base in particular in that on the one hand the seat frame section is resiliently fastened to the base and on the other hand the backrest frame section is rotatably fastened (expediently rotatable about a horizontal axis) to the base.
- the swivel chair is advantageously characterized in that a spring element is attached to the base support, which is transverse to the swivel chair orientation springs and has two ends.
- the spring element springs for example, in that the two ends of the spring element move alternately towards and away from one another.
- the two support levers are advantageously arranged to spread apart towards the seat frame section (or towards the front towards the seat frame section). A reset function of the chair paired with good seat stability is particularly implemented.
- the two support levers are expediently arranged to spread apart such that one spanned by the support levers
- Spreading angle in a sitting position of the swivel chair is smaller than in a reclined position of the swivel chair.
- backrest frame section and the seat surface frame section transfer into one another via joints such that the backrest frame section and seat surface frame section together form a contour which defines a coherent, in particular curved surface which includes the seat surface and the backrest surface.
- the backrest frame section, the seat frame section and optionally the joints together have a piping structure, into which e.g. a one-piece upholstery net can be stretched.
- the frame sections expediently have a circumferential piping structure, which in particular encircles the coherent surface.
- the frame is at least in two parts, including a backrest frame section which defines the backrest and a rear part of the seat surface, and a seat frame section which defines a front part of the seat surface, the backrest frame section and the seat frame section being movably connected to one another are, preferably by means of gels.
- the backrest frame section expediently defines the backrest and optionally a rear part of the seat surface and the seat surface frame section defines a front part of the seat surface.
- the backrest frame section is fastened to the base support so as to be pivotable or rotatable or tiltable about a horizontal axis.
- the backrest frame section is pivotally connected to the base support, in that the backrest frame section is fastened to the base support so as to be pivotable or rotatable or tiltable about a horizontal axis.
- the spring element is advantageously arranged below the seat surface, in particular below the seat surface and centrally between the sides of the chair.
- the spring element preferably includes at least one U-shaped spring element, the ends of the spring element, which are preferably designed as legs of the U-shaped spring element, in particular essentially being configured to be resilient against one another. It is expedient that each of the legs or each of the ends carries one of the support levers in extension.
- each end or each leg is articulated to its respective support lever.
- Each of the legs carries one of the support levers, whereby the support levers preferably spread apart (i.e. spread apart) from the legs and can be more or less angled relative to the support levers.
- the support levers are angled relative to the leg in such a way that the angle between the support lever and the leg exceeds 180 degrees in each case in the upright sitting position and in the reclined position. This corresponds to a kink around the articulated connection between the support lever and thigh, wherein the respective support lever and thigh are kinked against each other in such a way that the hollow of the knee that forms is on the outside of the thigh. It is particularly expedient that the support lever (and by means of this each end or each leg) is connected in an articulated manner to the seat frame section, in particular to the front bar of the seat frame section.
- the hinged connections between the spring end and the spring leg and the support lever and / or between the support lever and the seat frame section can be in the form of material V erjüngungen (ie film hinge), rotation springs and / or rotary joints to be carried out.
- the support levers are expediently designed to be rigid.
- the backrest frame section advantageously has a cross member, by means of which the backrest frame section is pivotably or rotatably or tiltably fastened to the base carrier.
- the cross member has two arms that are spread apart, which support the backrest frame section, and preferably a connecting part with a coupling area for the pivotable connection to the base member.
- the arms of the cross member are preferably spread apart from one another in order to create space for a seated person above the cross member.
- the connecting part preferably rises laterally to spread the two first arms and thereby forms a third (preferably) shorter arm and thus the connecting part which contains the coupling region.
- the supporting leg forms a multi-section base with a central receptacle for the wearer, preferably a multi-section base with swivel castors at the end of the links.
- the backrest frame section and the seat frame section are connected to one another by means of an articulation or joints, preferably can be kinked, in particular can be kinked against one another (ie with respect to one another and apart). In particular, this means that the backrest can be folded against the seat.
- the said joint or the joints contains two gels ke arranged on each side of the chair, which are preferably identical or mirror images, which are preferably an integral part of the frame.
- the frame advantageously defines the contour of the seat and backrest.
- backrest frame section and the crossbeam together form a rigid element.
- the backrest frame section and the cross member together preferably form a one-piece component.
- At least the front bar of the seat frame section or preferably the seat frame section as a whole is designed to be rigid.
- the spring element which is U-shaped, can hold a helical spring.
- a coil spring between the legs of a U-shaped spring element, the legs are arranged resiliently interconnected.
- the helical spring acts in particular as a helical compression spring, since the helical spring is essentially subjected to pressure.
- a second coupling area is expediently formed on the base support as a counterpart to the first coupling area in the crossmember such that the two coupling areas together form a tilting joint (preferably with a horizontally oriented axis of rotation) which is located below the seat surface (in particular at a distance from the seat surface essentially centrally under the Seat) is positioned so that it can be changed from a seated position to a reclined position via this joint.
- a tilting joint preferably with a horizontally oriented axis of rotation
- the swivel chair seat is advantageously designed in such a way that the spring element is compressed when leaning back, thereby storing energy which is released when sitting on, in order to facilitate resetting into the sitting position.
- opuonal features mentioned can be implemented in any combination, provided that they are not mutually exclusive. Especially where preferred areas che, further preferred ranges result from combinations of the minima and maxima mentioned in the ranges.
- This invention fulfills the foregoing requirements by providing an office chair that enables a user to synchronously move the seat and back by pushing back to comfortably recline from a seated position, and by sitting forward and Moving the backrest synchronously in order to comfortably take a sitting position from a reclined position.
- the chair frame consists of two rigid sections and two flexible sections, so that when you lean back, the opening angle between the seat and the backrest can increase.
- the back in the base support is pivotally mounted in the axis of rotation via the cross strut, which is an integral part of the backrest.
- the inclination of the back is limited by one or more stop pins.
- the U-spring is firmly connected to the base.
- the supporting element for the front edge of the seat is formed by the support levers, which are connected to the U-spring via a joint.
- the ends of the support levers are mounted in a cardanic suspension in the seat frame (ball joints).
- the U-spring is preloaded so that the restoring force Fr is generated via the spring force Fs. This is advantageous so that you can sit upright in the chair. If you lean back, the angles of attack a and ß change and the spring force Fs increases, so that the restoring force Fr also increases.
- the angle a denotes an angle of attack of the support levers with respect to a plane which is vertical between left and right side of the chair runs. This level can also be called the vertical mirror level of the chair.
- the angle ⁇ essentially denotes an angle of attack of the U-spring, that is to say in particular its leg, in relation to the aforementioned plane.
- In the chair base there is a slide bolt which can block the movement of the backrest in the foremost position.
- an additional spring element can be inserted between the U-spring.
- the force Fr can be changed and adapted to the body weight.
- the support lever and the U-spring can optionally be combined into one part.
- the swivel joints can be replaced by film joints.
- Conceivable materials for this part would be glass fiber or carbon fiber reinforced plastics.
- the seat frame, support lever and the U-spring can optionally also be combined into one part.
- the backrest frame can be produced as one part with the seat frame.
- Figure 1 Perspective view of the chair
- Figure 2 Chair view from the left with support lever (69) and swivel joint (75);
- Figure 3 top view of a chair with support lever (69);
- Figure 4 Chair view from the left with support lever (69) in the tilted position;
- Figure 5 top view of a chair with support lever (69) in the reclined position
- Figure 6 Chair view from the left with support lever (69) in section through swivel
- Figure 7 Section through lever joints (81, 82);
- Figure 8 Perspective view of a chair with energy storage (87) and pressure block (89) for power adjustment;
- FIG. 9 View from the left in half section. Pressure block (89) position in lightest
- Figure 10 Top view of pressure block (89) position in the lightest force setting
- Figure 11 View from the left in half section. Pressure block (89) position in strongest
- Figure 12 Top view of pressure block (89) position in the strongest force setting
- Figure 13 Perspective view of a chair with support lever (69), U-spring (61) and additional coil spring (91);
- FIG. 14 Top view of a chair with additional energy storage (91) in an upright position
- FIG. 15 top view of a chair with an additional energy store (91) in a reclined position
- Figure 16 Perspective view of a chair with a one-piece U-spring combination element (93), the U-spring (93) being designed as a one-piece combination element combining spring and support lever functions;
- Figure 17 Top view of the one-piece U-spring combination element (93) in the front and rear position (99);
- Figure 18 Chair view from the left with one-piece U-spring combination element (93) in an upright position;
- Figure 19 Top view of a chair with a one-piece U-spring combination element
- Figure 20 Top view of a chair with a one-piece U-spring combination element
- Figure: 21 Top view of a chair with a one-piece U-spring combination element
- Figure 22 Top view of a chair with a one-piece U-spring combination element
- Figure 23 Side view with section through the base support (45) and backrest frame (17) in an upright position;
- Figure 24 Side view with section through the base support (45) and backrest frame (17) in the reclined position;
- FIG. 25 Perspective view of a chair with a compact U-spring combination element (101), the U-spring (93) being designed as a one-piece combination element combining spring, support lever and base support functions:
- Figure 26 Side view of the chair with a central section through the U-spring compact (101);
- Figure 27 Top view of a chair with U-spring (61), support lever (69) and Wegrah men (19) formed as a component with integral joints realized as film joints (25, 103) in an upright position;
- Figure 28 Top view of a chair with a U-spring (61), support lever (69) and Wegrah men (19) designed as a building with integral joints realized as film joints (25, 103) in a reclined position;
- Figure 29 Top view of a chair showing the basic energy storage
- Figure 30 Top view of a chair showing the basic energy storage
- Figure 31 Perspective view of a chair with open membrane / mesh
- the seat-ready swivel chair shown in FIG. 31 is essentially made up of a seat 11 with a backrest 12 and a supporting leg 13.
- the supporting leg 13 preferably forms a vertical axis about which the seat 11 with a backrest 12 can be rotated.
- seat 11 and backrest 12 are exemplified by Netzbe tension 14, which is fixed to a frame 16.
- the pillar 13 has a multi-parted base 15 with expediently one caster at the end of each link.
- the swivel chair described above without mesh or without upholstery is provided.
- the chair frame 16 consists of two substantially rigid sections, 17 and 19, and two flexible sections, 21 and 23.
- the two rigid sections, 17 and 19, are by means of the two flexible sections 21 and 23, at two positions connected. Due to the flexibility of sections 21 and 23 are sections 17 and 19 are flexibly connected to one another.
- the section 17 is also referred to below as the backrest frame section, since this section essentially forms a frame for stretching a membrane, which in the area of the section 17 essentially serves to support the back 12.
- the section 19 is also referred to below as the seat frame section, since this section essentially forms a frame for clamping a membrane, which essentially serves as a seat 11 in the area of the section 19.
- Each of the sections 17 and 19 is expediently designed as a structure which is curved in its longitudinal extent, preferably each of the curved structures preferably having a mirror plane which runs between the two ends 25 and 27 or 29 and 31 of the respective structure.
- the two curved structures 17 and 19 are advantageously designed in such a way that the two structures 17 and 19, connected via their respective two ends by means of the short sections 21 and 23, form a preferably closed seat frame 16 at two points.
- the seat frame 16 preferably has a mirror plane which marks the middle between the right and left side of the seat frame.
- the two short sections 21 and 23 are mirror images of each other in the left and right seat frame side in the transition from the seat frame section in the backrest section arranged.
- the opening angle h between the seat surface 11 and back support surface 12, which is defined by the mutual position of the seat frame and backrest frame, is variable due to the flexible or articulated design of the two sections 21 and 23.
- the chair is designed in such a way that the opening angle h can increase when leaning back (FIGS. 2 and 4).
- the two short sections 21 and 23 are referred to as joint pieces or frame joints.
- the joint pieces 21, 23 can be designed as articulated or folding joints. In addition, a further embodiment of the joint pieces 21, 23 as pivot joints is conceivable.
- a seat membrane 14 with piping can be stretched onto the frame 16 at low cost, as is the case here is shown in Fig. 31.
- the lateral areas of the backrest frame section 17 in the lower area 37 ie in the area leading to the seat frame section (ie in the area near the joint), are advantageously in shape compared to an upper area 39 of an arch 37 which cuts out to the rear (for example an angle-like). Seen further from the side, as shown in FIG.
- the lateral areas of the seat frame section 17 in the rear area 41 ie in particular in the center and in the area leading to the backrest frame section (ie in the area near the joint), are essentially straight.
- the seat frame section 19 is expediently designed in the form of a bow 43 pointing downward toward the seat front bar 43. This shape is anatomically advantageous.
- the adjoining end regions (ie in the region close to the joint) of the seat frame section 19 and the backrest frame section 17 can be slightly inclined (or buckled) with respect to one another; while leaning back with increasing opening of the angle h, the orientations of the named end regions 37, 41 become more and more aligned to a substantially common planar orientation in a reclined position (FIG. 4).
- the orientation of the seat frame section 19 can tilt backwards so that the seat angle s (angle between seat surface and vertical) decreases, and at the same time the orientation of the backrest frame section 17 can also tilt backwards so that the angle of inclination of the backrest g increases. So that the opening angle h increases when leaning back, the change in the inclination angle of the backrest g is greater than the change in the seat angle s.
- the frame joints 21 and 23 give back when leaning back to the extent of the additional change in the inclination angle of the backrest.
- the frame 16 is carried by a base 45 (hereinafter also referred to as base support 45), which is expediently rotatably connected to the support leg 13 or is carried by it.
- the frame 16 is supported by the base 45 in particular in that on the one hand the seat frame section 19 is resiliently fastened to the base 45 and on the other hand the backrest frame section 17 is articulated, in particular rotatably, fastened to the base 45.
- the backrest frame section 17 is stiffened by means of a cross strut 47, preferably between the end regions 25, 27.
- the cross strut 47 is preferably an integral part of the backrest frame section 17. Via the cross strut 47, the backrest frame section 17 is pivotally mounted in the base support 45 (in particular in the axis of rotation 49).
- the cross member 47 has two arms 51 and 53, which are preferably spread apart from one another and carry the backrest frame section 17.
- the arms 51, 53 are expediently connected at the lower ends 25 and 27 of the backrest frame section 17 to the latter in a flexurally rigid manner.
- a connecting part 55 with a coupling area for articulated connection to the base support 45 is formed in the center of the cross strut 47.
- the coupling area includes, for example, a bearing 57 for articulated connection to the base 45 by means of an axis 49.
- the axis 49 is expediently aligned horizontally transversely to the seat (ie transversely to the seat surface and backrest ne), as a result of which the backrest frame 17 frames 19 relative to the seat surface or the backrest can be moved or inclined in relation to the seat surface, in particular away from it or towards it.
- the articulated connections 21, 23 between the backrest frame section 17 and seat frame section 19 are flexible or articulated forms.
- the inclination of the backrest frame section 17 is expediently limited by one or more stop pins 59 (FIGS. 23 and 24).
- the one or more stop pins 59 are formed on the base support 45, for example, on the cross member 47 or the connecting part 55 formed thereon, with the stop pins interacting stop surfaces are provided, by means of which the relative movement of the backrest frame 17 and base support 45 to a predetermined dimension (that is, in particular limited to a predetermined range of rotation angle about the axis 49.
- the seat frame section 19 is advantageously resiliently attached to the base 45 by means of a spring 61.
- a U-spring 61 is advantageously used for this (FIGS. 3 and 5).
- the spring 61 can be designed as a leaf spring.
- the U-spring 61 can be made of a metal, for example spring steel.
- a U-spring includes a spring base 67, of which two spaced apart spring legs 63, 65 on one Protrude side, the spring base 67 with the two legs 63 and 65 essentially forms a U or C shape.
- the U-spring 61 is attached via its base 67 to the base support 45 in such a way (FIG.
- the legs 63, 65 can spring freely, in particular in such a way that the legs 63, 65 spring against one another transversely to the seat orientation .
- the spring legs 63, 65 are not fastened directly to the seat frame 19, but rather each via a support lever 69, 71, which connects the respective spring leg end to the seat frame 19 in an articulated manner.
- the support levers 69, 71 protrude from the spring legs 63, 65 and spread out forward.
- the support levers 69, 71 are advantageously fastened to the front bar 73 (and not on the sides 72, 74) of the seat frame 19. Due to an arrangement of the support levers 69, 71 which spreads apart from the spring element 61 towards the front bar 73, a particularly stable seat surface results, in particular also against the front seat surface sagging to the side.
- the U-spring 61 is firmly connected to the base 45.
- the support levers 69, 71 connect the seat frame 19 and in particular the front bar 73 of the seat frame 19 to the U-spring 61.
- the one ends of the support levers 69, 71 are articulated on the seat frame 19 at bearing points 79, 81, particularly preferably in a cardan stored suspension.
- the other ends of the support levers 69, 71 are articulated to the spring element (i.e. in particular one support lever 69, 71 each to one of the legs 63, 65).
- a pivot 75, 77 preferably forms the articulated connection between a respective spring element 69, 71 and a support lever 69, 71.
- the axis of rotation of the articulated connection or of the swivel 75, 77 is preferably oriented perpendicularly to the spring movement direction.
- the support levers 69, 71 and the spring 61 are essentially arranged in a common plane.
- the axis of rotation of the articulated connection 75, 77 is preferably arranged perpendicular to this plane.
- support levers 69, 71 (within this plane) and legs 63, 65 are angled or bent relative to one another around the articulated connection 75, 77, so that grooves formed on the articulated connection 75, 77 between the support lever 69, 71 and leg 63, 65 lie on the outside of the leg. Due to this arrangement, the articulated connections 75, 77 move when Lean back (ie when applying a force or when tensioning the spring 61) towards each other and move away from each other when sitting on it (ie when relaxing the spring 61).
- FIGS. 6 and 7 show sections of the preferred ball-and-socket connection between support lever 71 and seat frame section 19.
- the bearing point 79, 81 is preferably designed as a ball joint socket, while the end of the support lever 69, 71 which is connected to it in an articulated manner is equipped with a ball joint head 80, 82 which matches the socket.
- the U-spring 61 is preloaded, so that the restoring force Fr is generated via the spring force Fs (FIGS. 27 to 30). This is useful so that you can sit upright in the chair or find the chair independently in the sitting position.
- angles of attack a and ⁇ change (which can be seen from FIGS. 3 and 5 in comparison, further also from FIGS. 27 to 30) and the spring force Fs increases, so that the restoring force Fr also increases (Figs. 27 to 28).
- the angles of attack a and ß indicate the orientation of the support levers 69, 71 and the spring legs 63, 65 in relation to the seat orientation. In the embodiment shown here, when the recline angle leans back, the support levers 69, 71 increase, exerting pressure on the spring legs 63, 65, so that restoring energy is stored in the spring 61, in particular by compressing the spring legs 63, 65.
- the advantage of mounting the support levers 69, 71 on the front bar 73 is that the angle a (in particular in the sitting position angle a1) can be selected to be more acute than if the support levers were attached to the side strips of the chair.
- a more acute angle a (in particular angle al) results in a greater restoring force Fr. That is, the more acute the angle a is (here, in particular, this means at least the angle al, but advantageously also a2), the greater the restoring force Fr ( this applies to an upright as well as a reclined position, ie for Frl and Fr2).
- the angle is al acute, ie al ⁇ 90 °, preferably al ⁇ 80 °, further al ⁇ 70 °, particularly preferably ⁇ 60 °.
- an angle al 90 ° (which can only be achieved with a bearing on the respective side bar 72, 74, which is not shown in the figures is) almost no restoring force would be generated.
- a sufficient restoring force can be generated.
- the bearing 79, 81 can then lie on the front bar 73 due to the geometric conditions. If the angle a, esp. Al, approaches 0 ° (pointed), the restoring force increases, which can lead to blocking.
- the angle a is appropriately smaller in the sitting position than in the reclined position, i.e. al ⁇ al.
- the angle between the spreading support levers 69, 71 corresponds to 2a, i.e. the double angle of attack a.
- the double angle of attack, i.e. 2a is also expediently smaller in a sitting position of the swivel chair than in a reclined position of the swivel chair, i.e. 2a1 ⁇ 2a2, this range being able to be further restricted by additional appropriate conditions.
- FIGS. 29 and 30 show the basic energy storage kinematics for the chair in the sitting position or in the reclined position.
- the kinematic chain with film joints 95, 103 is shown, 105 is shown in FIGS. 29 and 30 with swivel joints.
- the force Fs stored in the U-spring 61 is greater in the reclined position than in the sitting position (i.e. Fs2> Fsl).
- the restoring force is greater in the reclined position than in a more seated position (i.e. Fr2> Frl).
- a slide bolt 83 (FIG. 6) which can block the movement of the backrest 17 in the foremost position.
- This slide bolt 83 can be operated, for example, using a handle.
- the U-spring 61 is, for example, firmly connected to the base support 45 via one or more anchors 85. In order to implement a larger, if necessary adjustable, restoring force, the U-spring 61 can be equipped with further functional elements 87, 89, 91.
- an additional spring element 87 can be placed in or around the U-spring 61, or an additional spring element 91 or a pressure block 89 can be inserted between the legs 63, 65 of the U-spring 61, or a combination can be used - Nation of these measures are implemented, unless they are mutually exclusive.
- Such additional elements 87, 89 and / or 91 store additional pressure energy.
- an additional flexible element 87 made of elastic material is inserted into the U-spring.
- Such an additional spring element 87 can partially or completely fill the opening between the legs of the U-spring, which causes the restoring force of the U-spring to be increased.
- the elastic component 87 thus acts as an additional energy store.
- a flexible component 87 inserted into the U-spring can also be designed in a U-shape.
- the component 87 can be made of an elastic plastic, e.g. a rubber such as EPDM (i.e. ethylene-propylene-diene rubber).
- a pressure block 89 can be arranged between the spring legs which may be clad by the component 87.
- the pressure pad 89 can be placed in different positions, ie higher or lower, between the legs, as shown in FIGS. 9 to 12. Depending on the position, the pressure pad 89 more or less increases the restoring force of the U-spring 61.
- the pressure pad 89 preferably consists of a hard material, for example a hard plastic such as polyamide.
- the property hard means that the pressure pad material is hard enough that the pressure pad hardly or not deforms when used in accordance with the present invention. A deformation would therefore only take place in the U-spring and, if present, in element 87.
- the additional force implementation would also work with a pressure block 89 made of elastic plastic (ie the pressure block in a design as a likewise flexible component), but would not be as effective.
- the pressure pad 89 can be adjustable, in particular locally adjustable, as shown in FIGS. 9 to 12. By adjusting the position of the pressure pad 89 between the spring legs, the pressure pad 89 times deeper or less deep between the legs (Fig. 9 to 12 in comparison), the spring property can be influenced, for example to adapt the chair to heavier or lighter users. Depending on the position, the pressure pad increases the restoring force of the spring element 61, possibly in correlation with the energy accumulator 87.
- the pressure pad itself can also act as an energy accumulator.
- the two additional spring elements can be used alone or in combination.
- a combined embodiment is shown in FIG.
- FIG. 13 to 15 show an example of a helical spring 91 additionally inserted between the legs of the U-spring 61.
- a spiral spring 91 also increases the restoring force of a U-spring.
- the force Fr can be changed and adapted to the body weight of a chair user.
- the construct for supporting the seat frame on the base 45 and implementing the restoring force consists of the functions of spring and support lever, which, as described above, expediently consist of at least three components, that is two support levers 69, 71 and a U-spring 61, expediently plus joints, in particular the swivel joints 75, 77 (between a first end of the support levers and one leg end of the U-spring) and ball joints 79, 80 81, 82 (between a second end of the support levers and seat frame section 19).
- the two functions, spring and support lever can be combined in an alternative component 93, ie a one-piece U-spring part with a support lever function, as can be seen in FIG. 16.
- the Ge steering function between the spring and support lever is realized by means of joint 95.
- This alternative U-spring part 93 with a support lever function can be attached to the base support 45 via its spring base 67 and can be articulated, for example, via cardanic suspensions 79, 81 to its support lever ends on the seat frame 19.
- Conceivable materials for this alternative component would be 93 glass fiber or carbon fiber reinforced plastics. 17 shows the respective shape formation in the seated position 97 and in the reclined position 99 of the chair shown in comparison.
- the shape is based on a spring effect in the legs, which pass into lever arms via film joints.
- 18 to 21 show the shape of the form in the chair in the sitting position and in the reclined position.
- the frame sections for the backrest 17 and seat 19 including the articulated frame sections 21 and 23 connecting them can be produced as a one-piece frame.
- the frame sections 21 and 23 are then designed to be correspondingly flexible, e.g. due to area-wise thinning of the material. A largely one-piece production is sought for economic reasons.
- First sidebar of the seat frame i.e. Frame section which forms the first side edge
- Front bar of the seat frame i.e. Frame section which forms the front edge of the seat
- Second sidebar of the seat frame i.e. Frame section, which forms the second side edge
- First depository e.g. designed as a gimbal suspension (ball joint)
- Second storage location e.g. designed as a gimbal (ball joint)
- Lift mechanism e.g. a flexible component
- Energy storage e.g. pressure block, preferably adjustable pressure block
- Lift mechanism e.g. a coil spring
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs Characterized By Structure (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01109/18A CH715343A1 (de) | 2018-09-18 | 2018-09-18 | Drehstuhl. |
PCT/CH2019/050021 WO2020056531A1 (de) | 2018-09-18 | 2019-09-18 | Drehstuhl |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3852581A1 true EP3852581A1 (de) | 2021-07-28 |
Family
ID=65724129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19773731.5A Withdrawn EP3852581A1 (de) | 2018-09-18 | 2019-09-18 | Drehstuhl |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3852581A1 (de) |
CH (1) | CH715343A1 (de) |
WO (1) | WO2020056531A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020110707A1 (de) * | 2020-04-20 | 2021-10-21 | Bock 1 Gmbh & Co. Kg | Sitzmöbel |
WO2022187667A1 (en) * | 2021-03-04 | 2022-09-09 | Hni Technologies Inc. | Chair with dynamic motion features |
DE102021109662B3 (de) | 2021-04-16 | 2022-06-15 | Topstar Gmbh | Stuhl, insbesondere Drehstuhl |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3879679D1 (de) * | 1988-04-12 | 1993-04-29 | Martin Steiffensand F | Sitzmoebel. |
DE10115501C2 (de) * | 2001-03-29 | 2003-03-27 | Struppler Associates Design Gm | Stuhl, insbesondere Bürostuhl |
US6869142B2 (en) | 2002-09-12 | 2005-03-22 | Steelcase Development Corporation | Seating unit having motion control |
DK2004020T3 (en) | 2006-03-24 | 2014-12-08 | Miller Herman Inc | seating arrangement |
DE102007001194A1 (de) * | 2007-01-05 | 2008-07-10 | Omp S.R.L | Bewegungsgekoppelte Servoeinrichutng für ein Sitzteil, insbesondere eines Stuhls |
USD702955S1 (en) | 2012-10-08 | 2014-04-22 | Vitra Patente Ag | Chair |
DE102014103780B3 (de) * | 2014-03-19 | 2015-06-18 | Wilkhahn Wilkening + Hahne Gmbh + Co. | Stuhl |
-
2018
- 2018-09-18 CH CH01109/18A patent/CH715343A1/de not_active Application Discontinuation
-
2019
- 2019-09-18 EP EP19773731.5A patent/EP3852581A1/de not_active Withdrawn
- 2019-09-18 WO PCT/CH2019/050021 patent/WO2020056531A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
CH715343A1 (de) | 2020-03-31 |
WO2020056531A1 (de) | 2020-03-26 |
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