WO2013083562A1 - Piece of seating furniture having a resilient connecting element - Google Patents

Piece of seating furniture having a resilient connecting element Download PDF

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Publication number
WO2013083562A1
WO2013083562A1 PCT/EP2012/074360 EP2012074360W WO2013083562A1 WO 2013083562 A1 WO2013083562 A1 WO 2013083562A1 EP 2012074360 W EP2012074360 W EP 2012074360W WO 2013083562 A1 WO2013083562 A1 WO 2013083562A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
leg
backrest
leaf spring
seating furniture
Prior art date
Application number
PCT/EP2012/074360
Other languages
German (de)
French (fr)
Inventor
Joachim Rainer BRÜSKE
Original Assignee
Brueske Joachim Rainer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102011120753A priority Critical patent/DE102011120753A1/en
Priority to DE102011120753.1 priority
Application filed by Brueske Joachim Rainer filed Critical Brueske Joachim Rainer
Publication of WO2013083562A1 publication Critical patent/WO2013083562A1/en

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining 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
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272Reclining 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

Abstract

The invention relates to a piece of seating furniture (1, 2), in particular to an office chair. The piece of seating furniture has a backrest (3) and a seat surface (5). The seat surface is operatively connected to the backrest. According to the invention, the piece of seating furniture has an in particular single-piece connecting element (10, 11, 40, 41). The connecting element is connected to the backrest and the seat surface and designed to counteract a pivoting movement of the backrest in a resilient manner. The connecting element is designed to pivot along the seat surface in a predetermined manner in relation to the pivoting movement of the backrest, and therefore the backrest and the seat surface, during pivoting of the backrest, open one another at an opening angle (29).

Description

 Seating furniture with a spring-trained unaseleroent

Description :

The invention relates to a chair, in particular an office chair. The chair has a backrest and a seat. The seat is operatively connected to the backrest.

In the case of office chairs known from the state of the art, which allow the seat to move along with an increase in the opening angle between the seat and the backrest when the backrest is moved back, this is achieved by means of coupling gears comprising several

Coupling links effected.

According to the seating furniture of the type mentioned on a particular integrally formed connecting element. The connecting element is connected to the backrest and the seat surface and designed to resiliently counteract a pivoting movement of the backrest. The connecting element is formed, the seat with a predetermined ratio to the pivoting movement of the

Swivel the backrest so that the backrest and the seat surface open each other with an opening angle when the backrest is swiveled. By preferably integrally formed connecting element, the seating furniture can be advantageously provided low cost.

In an advantageous embodiment, the connecting element is formed integrally with the backrest. For example - - The connecting element together with the backrest in one

Injection molding, in particular plastic injection molding produced.

Preferably, the connecting element has at least one preferably U-shaped seat leaf spring and at least one preferably U-shaped

Back leaf spring on. The seat leaf spring has a seat leg and a base leg. The backrest leaf spring has a backrest leg and a base leg. The seat leg of the seat leaf spring is connected to the seat and the back legs of the back leaf spring is connected to the backrest.

Preferably, a longitudinal portion of the base leg of the seat leaf spring with a longitudinal portion of the base leg of the at least one

Backrest leaf spring connected to a connecting portion, wherein the seat leg is connected to the backrest leg by means of a pivot joint. Preferably, the base leg is the

Seat leaf spring integrally formed on the base leg of the back leaf spring.

By means of the connecting element thus formed, the

Connecting element advantageous - for example, by punching from a spring steel sheet - are provided particularly cost-effective.

Preferably, an effective pivot axis of the backrest leaf spring extends parallel to the effective pivot axis of the seat leaf spring

spaced. This can advantageously a synchronous movement of

Backrest and the seat can be generated. Preferably, the pivot axis of the seat leg and the backrest leg runs

connecting pivot joint parallel to the effective pivot axes of the seat leaf spring and the backrest leaf spring.

In a preferred embodiment, a turning portion connecting the legs of the seat leaf spring extends from

Connecting portion from further radially outward than a Turning section of the backrest leaf spring, wherein the legs of the

Backrest leaf spring over the turning section of the backrest leaf spring

connected to each other. This advantageously causes a distance between the effective pivot axes of the backrest leaf spring and the seat leaf spring.

Preferably, the Verbindungsseiement is formed so that the seat and the backrest during pivoting back of the backrest each other about a common pivot axis pivoting open with the predetermined ratio.

More preferably, the seating is designed such that the common effective pivot axis when pivoting back the backrest with a hip pivot axis of a particular adult

People coaxially runs. As a result, it can be advantageously prevented that, when leaning back, a person seated in the chair moves the backrest parallel to a back of the person leaning back, so that an outerwear worn by the person can be pushed upwards when leaning back. For example, by pushing upwards, the person may experience the unpleasant sensation that, when leaning back, a shirt worn by the person is pulled out by pushing upwards.

In a preferred embodiment, the turning portion of the seat leaf spring on an intermediate portion. The intermediate portion forms a seat leg and the base leg of the seat leaf spring a

Intermediate leg, so that the seat leg and the base leg can each swing resiliently against the intermediate leg. By the intermediate leg can advantageously be formed another effective pivot joint, which is formed, a pivoting of the seat opposite to the pivoting direction of the seat during

Swing back the backrest to effect. - -

In a preferred embodiment, the seat leg is rigidly connected to the seat surface, wherein the connecting element is formed, that the seat leg in a pressure load, in particular by a

Occupy by a person who can deflect in the area of the turn section. Preferably, the seat leg extends parallel to the seat.

Preferably, the connecting element is formed such that upon compression of the seat leg by the pressure load of the intermediate leg can pivot against the seat leg in the opposite direction of pivoting than the base leg against the intermediate leg. As a result, a kind of scissors joint is advantageously formed by means of the intermediate portion, whereby a movement course during compression by the pressure load

can be predetermined.

In a preferred embodiment, the connecting element comprises two backrest leaf springs, wherein the two backrest leaf springs, the seat leaf spring between them. This can do that

Connecting element advantageous with a small footprint

to be provided.

In a preferred embodiment, the legs of the seat leaf spring extend in mutually opposite directions. The

Connecting element can be formed so advantageous particularly flat.

In a preferred embodiment of the chair that is

Connecting element formed such that a hinge axis of the

Seat legs and the back legs connecting with each other

Swivel joint for changing a leg length of the seat leg and the backrest leg up to the connecting pivot joint - preferably transversely to a longitudinal extension of the hinge axis - can be moved lockable. By changing the leg length of the

Seat leg and the back leg up to the connecting Swivel joint can be advantageously changed a spring stiffness of the spring back of the backrest and the opening angle between the backrest and the seat during pivoting back of the backrest.

In a preferred embodiment, the base leg of the seat leaf spring via a turning section with the base leg of

Joined back leaf spring, so that the base leg of the seat leaf spring and the base leg of the backrest leaf spring are resiliently connected to each other. Through this education of the

Connecting element may be connected to the seat leg

Following a pressure load in the area of a front edge of the seat, the seat can be sprung in accordance with the pressure load.

The seat preferably has a seat plate, wherein the seat plate is formed for example of wood, metal or plastic. The backrest preferably has a plate, which is formed for example of wood, metal or plastic.

The invention will now be described below with reference to figures and further embodiments. Further advantageous

Embodiments result from the features described in the figures and in the dependent claims.

Figure 1 shows an embodiment of a chair with a

Connecting element wherein the connecting element comprises a U-shaped seat leaf spring and a backrest leaf spring, wherein the seat leaf spring and the backrest leaf spring are coupled together via a pivot joint;

Figure 2 shows the connecting element shown in Figure 1 in detail in a lateral plan view; Figure 3 shows the connecting element shown in Figure 2 in the loaded state during spring back one with the connecting element

connected backrest;

FIG. 4 shows the connecting element shown in FIG

pivoted state at a pressure load one with the

Connecting element connected seat in the area of a

Leading edge;

Figure 5 shows the connecting element shown in Figure 2 in a plan view;

FIG. 6 shows a variant for a connecting element with an S-shaped spring section, one connected to the seat surface

Sitting seat connects with a backrest connected to the backrest legs;

FIG. 7 shows an exemplary embodiment of a connecting element, in which a backrest leg of a backrest leaf spring connected to a backrest extends in the opposite direction to the base leg of the backrest leaf spring;

FIG. 8 shows a variant of that shown in FIG

Connecting element, in which a pivot joint, the

Back leaf spring and the seat leaf spring connects, is formed displaceable by moving an axis in a slot, so that a formed by means of the pivot joint crosspoint

can be moved;

FIG. 9 shows a variant of a seat produced by means of casting, in particular injection molding, with a connecting section which corresponds to the connecting element shown in FIG. 1 shows an embodiment of a seating 1. The seating 1 has a backrest 3, a seat 5 and a connecting element 10. The chair 1 also has a frame 7, which in this embodiment has a base with a lift, in particular a gas lift. Through the frame 7 extends an axis 20, wherein the axis 20 extends perpendicular to the seat surface 5 in this embodiment. The backrest 3 is connected to the seat 5 via the

Connecting element 10 connected.

The backrest 3 and the seat 5 close in this

Embodiment a predetermined opening angle 28th

between each other. The connecting element 10 is formed in response to a pivoting back of the backrest 3 a

To produce spring force and to oppose the spring force to swing back. The connecting element 10 is connected to the frame 7. The operation of the connecting element 10,

in particular when moving back the backrest 3, which

For example, by a leaning of the person 25 is effected against the backrest 3, will be explained in more detail below with reference to Figures 2 and 3.

FIG. 2 shows the seating furniture already shown in FIG

Partial representation. Shown is the backrest 3 and the seat surface 5, which are connected by means of the connecting element 10 resiliently. The connecting element 10 has a seat leg 12, which is connected to the seat surface 5. The seat 5 is, for example, by means of a screw or a rivet connection with the seat! 12 of the connecting element 10 - for example

movable - connected. For this purpose, a slot can be formed in the seat leaf spring 12, so that one connected to the seat surface 5

Screwed lock in the slot lockable pushed back and forth , - can be. The connecting element 10 is in this

Embodiment of a leaf spring material, in particular

Leaf spring steel formed. In another embodiment, the connecting element 10 can also have carbon fibers, which are connected to one another, for example, by means of epoxy resin.

The connecting element 10 has a seat leaf spring, which in

Longitudinal section has a U-shape. The seat leaf spring of

Connecting element 10 comprises in this embodiment, the already-mentioned seat leg 12 and a base leg 14, wherein the seat leg 12 and the base leg 14 are connected to each other via a turning portion 19 of the seat leaf spring. The turning portion 19 comprises in this embodiment, an intermediate portion 13, wherein the intermediate portion 13 in sufficiently rigid to form a

Intermediate leg is formed. In this embodiment, the intermediate portion 13 is straight in longitudinal section. Of the

Between section 13 is connected via a curved longitudinal section joint portion 17 with the seat leg 12. By the

Joint portion 17 is transverse to the illustrated view of the

Connecting element 10 an edge of the connecting element 10th

educated.

The intermediate portion 13 is connected via a hinge portion 15 with the base leg 14 of the seat leaf spring. The hinge portion 15 is curved in longitudinal section and forms transverse to

Longitudinal section a front edge of the connecting element 10. The

Base leg 14 is in its further extension of the turning portion 19 away in a connecting portion 22, wherein the base leg 14 is connected in the region of the connecting portion 22 with a base leg 18 of a backrest leaf spring. - -

The backrest leaf spring comprises in addition to the base leg 18 a

Backrest leg 16, which is connected via a turning section 23 with the base leg 18. The turning section 23 forms both a spring and a pivot joint of the backrest leaf spring. Of the

Backrest leg 16 is connected to a backrest support 34, wherein the backrest support 34 is formed in this embodiment by a particular angled metal support. The backrest support 34 is connected to the backrest 3, which in this embodiment a

Includes metal frame or a plastic frame and over the

Backrest support 34 is connected at right angles to the backrest leg 16. The backrest 3, which is arranged in this embodiment in a backrest plane 24, increases to a seat plane 21, in which the

Seat legs 12 of the seat spring extends, a predetermined

Opening angle 28 a. The connecting element 10 is in this

Embodiment connected to a base support 33, which is designed to connect the connecting element 10 supporting the frame 7. The base support 33 is at least partially received between the base leg 14 and the seat leg 12 in this embodiment. The base support 33 has an opening in which an end portion of the aforementioned gas spring of the frame 7 projects through and is received longitudinally. Shown is also a castle nut 35, with the base support 33 and the frame 7 is held together separable.

The seat leg 12 and the backrest leg 16 are - each spaced from the turning portion 19 and the turning portion 23 - connected by means of a pivot joint 30. For this purpose, a tab is integrally formed on the seat leg 12, which is transverse to the

Seat level 21 the Lehnenschenkel 16 extends. Of the

Backrest leg 16 is shown in this embodiment, together with the turning portion 23 - in a projection of the shown in a plan - -

Leg - between the seat leg 12 and the base leg 14 of the seat leaf spring - added. The seat leg 12 is supported in the region of an end facing away from the turning portion 19 against a

Rückneigeanschlag 38, which is formed during compression against a spring element 39 which bears against the base support 33, the spring travel of the seat leg 12 and the back leg 16 during compression - for example, by occupying the seat 5 with a person 25 - to limit.

The pivot joint 30 has a hinge axis, which extends through an opening of the aforementioned integrally formed on the seat leg 12 tab. The backrest leg 16 is operatively connected to a further tab, wherein the further tab has an opening through which the aforementioned hinge axis extends. That's one

Swivel joint formed, wherein the seat leg 12 and the

Lehnenschenkei 16 are pivotally connected to each other by means of the pivot joint.

When swinging back the backrest 3 can thus the

Increase opening angle 28, wherein an effective pivot axis 27 of the pivoting between the backrest 3, in particular the plane 25 and the seat surface 5, in particular the seat plane 21, with a

Pivot axis of a hip joint of the person 25 runs coaxially. The intermediate section 13 forms an end face of the connecting element 10 in this embodiment.

Figure 3 shows the already partially shown in Figure 2 seating 1. When pivoting back of the backrest 3 of the chair 1 in Figure 2, the frame 7 remains unchanged in its position. Shown is the

zurückgeschwenkte backrest 3 \ which swung back in a backrest level 24 'is located. The seat 5 in Figure 2 takes in the pivoted position, the position 5 'in the tilted seat plane 21' one. The base leg of the seat leaf spring is shown in position 14 ', the intermediate section is shown in the pivoted position 13 Y and the seat leg is shown in the pivoted position 12'.

The backrest leaf spring is also shown in Figure 3 in a pivoted position, wherein the backrest leg in the position 16 and the

Wendeabschnttt the backrest leaf spring is shown in position 17. Between the seat plane 2Γ and the backrest plane 24 "now results in an opening angle 29, which is greater than the opening angle 28 in Figure 2.

This is caused by the pivot joint, which is shown in the pivoted position 3 CT. Next will be the enlargement of the

Opening angle thereby causes an effective pivot axis of the legs of the seat leaf spring of the effective pivot axis of the

Leg of the backrest leaf spring is spaced parallel to each other.

FIG. 4 shows a part of the elements of the seat 1 already shown in FIGS. 2 and 3. Shown is the connecting element 10, wherein the connecting element 10 is pivoted in the direction of the axis 20 into a position 10 "by a pressure load in the front region of the seat leaf spring 12 The intermediate portion of the turning portion is shown in position 13 "and the base leg in position 14".

A spring deflection of the connecting element 10 is limited by a spring stop 34. The spring stop 34 is formed in this embodiment by a hollow cylindrical rubber buffer, through which a connecting bolt is guided, which with one end positively against the rubber buffer and with a thereto

opposite end positively abuts against the base leg 14. - -

The backrest leg 16 is in Figure 4 in the seat plane 21st

The seat plane 21 "pivoted down in comparison with the seat plane 21 is also shown. Advantageously, by the turning portion with the intermediate portion 13 of the seat leg 12 in the pivoted position 12 "maintain its shape without significantly deflect.

FIG. 5 shows that already shown in FIGS. 2, 3 and 4

Connecting element 10 in a plan. Shown is the seat leaf spring with the seat leg 12, the intermediate portion 13 and the

Base gifts! 14. Shown is also the backrest leaf spring, which already shown backrest leg 16 and another

Backrest leg 16a includes.

The seat leg 12 extends in its width dimension transverse to the longitudinal extent of the seat leg 12 between the back legs 16 and 16 a, so that the seat leg 12 during compression between the

Back legs 16 and 16a can spring through.

Shown is also the backrest support 34, which in this

Embodiment is designed as a fork, with a fork arm with the backrest leg 16 and another fork arm with the

Back leg 16a is connected. The backrest support 34 has an angled portion in this embodiment and is

designed to be connected to the angled portion of the backrest 3.

The base leg 18 of the back leaf spring and with the

Back legs 16a connected base legs 18a are on the

Connecting portion 22 integrally formed on the base leg 14. FIG. 6 shows an exemplary embodiment of a connecting element 11. Like the connecting element 10 already shown in FIGS. 2 and 3, the connecting element 11 has a seat leaf spring with a

Seat leg 12, a base leg 14 and the seat leg 12 and the base leg 14 connecting turn section 31 comprising the intermediate portion 13.

Unlike the connecting element 10, the connecting element 11 has a turning section 36 of the seat leaf spring, which connects the longitudinal leg with a predominant directional component in the same direction as the seat leg 12 extending base leg 14 of the seat leaf spring with the base leg 18 of the back leaf spring.

The base leg 14 and the base leg 18 can thus pivot to each other by means of the turning section 36 forming both a spring and a pivot joint. By means of the base legs 14 and 18 and the backrest leg 16 and the turning sections 23 and 36, an S-shape is formed in the longitudinal section of the spring element 11.

The frame 7 is by means of a base support 50 with the

Connecting element 11, and there with the base leg 18, connected.

The seat leg 12 and the backrest leg 16 are - each spaced from the turn portions 31 and 23 - connected by means of a pivot joint 30.

The spring element 11 is a pressure load in the front area - for example, by a person sitting on the front edge of the seat 5 person - shown in a pivoted position 1. The pivoting down into the position 11 'is performed by the pivot leaf spring, formed by the base leg 18, the turning portion 36 and the base leg 14 resiliently. In the embodiment of the connecting element in FIG. 6, the intermediate section 13 forms an end face of the connecting element 11.

Figure 7 shows a variant for a partially illustrated seating furniture with a connecting element 40. The connecting element 40 has a seat leaf springs comprising a seat leg 12 and a base leg 14, wherein the seat leg 12 by means of a

Turning section 37 is connected to the base leg 18. The

Seat leaf spring forms in the illustrated plan a U-shape.

The intermediate portion 13 and the seat leg 12 are in this

Embodiment just formed, wherein the intermediate portion 13 of the turning portion 37 is angled to the seat leg 12, so that extends between the intermediate portion 13 and the seat leg 12 has an edge. The intermediate portion 13 forms in the embodiment of the connecting element in Figure 7 is a front side of the

Connecting element.

The base leg 14 extends in this Ausführungsbeispiei in the same direction as the seat leg 12, in particular parallel to the seat leg 12, so that in the illustrated in Figure 7

Longitudinal sectional view of a U-shape of the seat leaf spring is formed. The base leg 14 is angled at the intermediate section 13

formed so that the angled transition region of the

Between portion 13 to the base leg 14 toward a front edge of the connecting element 40 forms.

The base leg 14 is connected in this embodiment in the further course by means of a base support 52 with the frame 7. _ _

On the base leg 14, a base leg 18 of a back leaf spring is formed, which is in the opposite direction to a

Lehnenschenkel 16 of the back leaf spring extends. The back leaf spring of the connecting element 14 thus has - unlike the back leaf spring of the connecting elements 10 and 11 - no turning section between the base leg 18 and the back leg 16, so that the

Back leaf spring of the connecting element 40 does not form a U-shape. The backrest leaf spring, in particular the legs of the back leaf spring of the connecting element 40, close in this embodiment, an opening angle of less than 180 degrees and more than 90 degrees

between each other.

The seat leg 12 is spaced from the turning portion 37 by means of a pivot joint 30 connected to the backrest leg 16. For this purpose, the backrest leg 16 a transversely to the backrest leg 16 extending tab 43 with an opening, which on the

Back leg 16 is formed. The seat leg 12 has an integrally formed thereon and angled from this tab 42 with a corresponding breakthrough. The pivot joint 30 comprises a hinge axis which extends through the openings of the tabs 42 and 43. Thus, the seat leg 12 and the backrest leg 16 are pivotally connected to each other by means of the pivot joint 30. Of the

Back leg 16 is connected in the region of one end to the backrest 3 via a backrest support 34. In the embodiment of the connecting element in FIG. 7, the intermediate section 13 forms an end face of the connecting element 40.

FIG. 8 shows an exemplary embodiment of a connecting element 41, in which the swivel joint 30 already shown in FIG. 2 is designed to be displaceable. This is in the molded on the seat leg 12

Lug a slot formed in the backrest leg 16 - - operatively connected, in this embodiment, the backrest support 34 molded tab is also a corresponding slot

educated. The extending through the slots axis can thus be pushed back and forth in the slot 32. By means of a

Locking nut, the axis can be detected, for example. The locking nut may, for example, be connected to a pivoting lever that is tangibly formed by a particular adult hand of a human being.

By means of the thus formed pivot joint can advantageously the

Ratio of the opening angle 28 in Figure 2 to the opening angle 29 are set in Figure 3.

For example, a pivot angle of the seat 5 of the

Seat plane 21 in the pivot position 2Γ between one third and half of the pivot angle of the backrest plane 24 in the pivot position 24 \

Figure 9 shows a seat 2 in a plan view. The chair 2 has a backrest 3 formed by a frame. The backrest 3 is formed on a resiliently formed connecting portion, which is formed, the backrest 3 with a - not in Figure 9

shown - seat to connect. The connecting portion has a seat leaf spring and a backrest leaf spring. The seat leaf spring is U-shaped and has a seat leg 12 and a

Base leg 14 on. The seat leg 12 is connected to the base leg 14 via a turning portion, wherein the turning portion has a particular planar formed intermediate portion 13. The intermediate portion 13 is connected to the seat leg 12 via a

Joint portion 15 is connected, so that the seat leg 12 forms with the intermediate portion 13 a spring-loaded pivot joint. Of the

Intermediate section 13 is connected to the backrest leg 14 via a Joint portion 17 is connected, so that the backrest leg 14 with the intermediate portion 13 forms a spring-loaded pivot joint.

At the base leg 14, a base leg 18 of the backrest leaf spring is formed, which has a turning section 23 with a

Back leg 16 is connected. A pivot joint 30 connects the backrest leg 16 with the seat leg 12 spaced from the turning portion 23 and the intermediate portion 13. The

Swivel joint 30 has an integrally formed on the backrest leg 16 receptacle for a hinge axis. The seat leg 12 has a transverse to the longitudinal extension of the seat leg through the seat leg opening, through which the hinge axis extends. The hinge axis opens into a further backrest leg 16 a of

Backrest leaf spring, which is connected via a further turning section 23a with the base leg 18. The backrest legs 16 and 16 a form in each case against the base leg 18 a spring-loaded pivot joint through which the angled formed on the back legs 16 and 16a backrest experiences a restoring force when pivoting back. The seat leg is pivoted by the pivot joint 30 with a predetermined ratio, so that when pivoting back the

Backrest 3 an already shown in Figure 3 opening angle 29 between the backrest 3 and the seat leg 12 results.

With the base leg 18, a frame 7 of the chair 2 is connected. The backrest 3 and the parts of the connecting portion are

for example, plastic, in particular polypropylene, polyamide, polycarbonate, polymethyl methacrylate or ABS polymer (ABS =

Acrylonitrile-butadiene-styrene). For example, the plastic is fiber reinforced, especially with glass fibers or carbon fibers. The Verbindungsseiement of Figure 2 corresponding connecting portion of - -

Seating furniture 2 is for example produced together with the backrest in a casting process, in particular injection molding.

Claims

Patent claims;
1. Seating furniture (1, 2) with a backrest and a seat surface (5), wherein the seat surface (5) with the backrest (3) is operatively connected, characterized in that the seating (1, 2) in particular integrally formed connecting element ( 10, 11, 40, 41), which is connected to the backrest (3) and the seat surface (5) and formed, a pivoting movement of the
 Backrest (3) resiliently counteract, wherein the
 Connecting element (10) is designed to pivot the seat surface (5) in a predetermined relationship to the pivotal movement of the backrest, so that the backrest (3) and the seat surface (5) when pivoting the backrest (3) with each other
 Open the opening angle (29).
2. Seating furniture (1, 2) according to claim 1, characterized in that the connecting element (10, 11, 40, 41) at least one
in particular U-shaped seat leaf spring (12, 13, 14) and at least one in particular U-shaped backrest leaf spring (16, 18, 23), wherein a seat leg (12) of the seat leaf spring with the seat surface (5 ) and a back leg (16) of the back leaf spring is connected to the backrest (3), and a longitudinal portion of a base leg (14) of the seat leaf spring with a longitudinal portion of a base leg (18) of the at least one back leaf spring is connected to a connecting portion (22), wherein the seat leg (12) with the backrest leg (16) by means of a pivot joint (30) is interconnected.
3. Seating furniture (1, 2) according to claim 2, characterized in that one of the legs (12, 14) of the seat leaf spring connecting
 Turning portion (19) from the connecting portion (22) from further radially outwardly extending as a turning portion (23) of the back leaf spring, wherein the legs (16, 18) of the back leaf spring on the turning portion (23) of the back leaf spring connected to each other.
4. Seating furniture (1, 2) according to one of the preceding claims,
 characterized in that the connecting element (10, 11, 40, 41) is formed, that the seat surface (5) and the backrest (3) during pivoting back of the backrest (3) about a common effective pivot axis (27) with the predetermined ratio open swiveling.
5. Seat furniture! according to claim 4, characterized in that the
 Seating furniture (1, 2) is formed so that the common effective pivot axis (27) during the pivoting back of the backrest (3) with a hip joint pivot axis of a particular adult
 People coaxially runs.
6. Seating furniture (1, 2) according to one of the preceding claims,
characterized in that the turning portion (19) of the seated leaf spring has an intermediate portion (13) forming an intermediate leg to the seat leg (12) and the base leg (14) so that the seat leg (12) and the Base legs (14) in each case against the intermediate portion (13) can pivot resiliently.
7. Seating furniture according to one of the preceding claims, characterized in that the connecting element (10, 11, 40, 41) is formed, that the seat leg (12) is rigidly connected to the seat surface (5) and the seat leg ( 12) at a
 Pressure load in the region of the turning portion (19) can spring.
8. Seating furniture (1, 2) according to one of the preceding claims,
 characterized in that the connecting element (10, 11, 40) comprises two backrest leaf springs which sandwich the seat leaf spring.
9. Seating furniture (1, 2) according to one of the preceding claims,
 characterized in that the legs (12, 14) of the seat leaf spring extend in mutually opposite directions.
10. Seating furniture (1, 2) according to one of the preceding claims,
 characterized in that the connecting element (10, 11, 40) is formed such that a hinge axis of the seat leg (12) and the backrest leg (16) interconnecting pivot joint (30) for changing a leg length of
Seat leg (12) and the backrest leg (16) to the connecting pivot joint (30) can be moved lockable. Seating furniture (1, 2) according to one of the preceding claims, characterized in that the base leg (14) of the seat leaf spring is connected via a turning section (36) to the base leg (16) of the backrest leaf spring, so that the base leg (14 ) of the seat leaf spring and the base leg (18) of
Backrest leaf spring are resiliently connected to each other.
PCT/EP2012/074360 2011-12-05 2012-12-04 Piece of seating furniture having a resilient connecting element WO2013083562A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102011120753A DE102011120753A1 (en) 2011-12-05 2011-12-05 Seating furniture with a resiliently formed connecting element
DE102011120753.1 2011-12-05

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12801526.0A EP2787860B1 (en) 2011-12-05 2012-12-04 Piece of seating furniture having a resilient connecting element
DK12801526.0T DK2787860T3 (en) 2011-12-05 2012-12-04 Chair with a spring connector
ES12801526.0T ES2663604T3 (en) 2011-12-05 2012-12-04 Seat furniture with an elasticly configured connecting element

Publications (1)

Publication Number Publication Date
WO2013083562A1 true WO2013083562A1 (en) 2013-06-13

Family

ID=47358147

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/074360 WO2013083562A1 (en) 2011-12-05 2012-12-04 Piece of seating furniture having a resilient connecting element

Country Status (7)

Country Link
EP (1) EP2787860B1 (en)
DE (1) DE102011120753A1 (en)
DK (1) DK2787860T3 (en)
ES (1) ES2663604T3 (en)
HU (1) HUE036791T2 (en)
PT (1) PT2787860T (en)
WO (1) WO2013083562A1 (en)

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GB2529659A (en) * 2014-08-28 2016-03-02 Yao-Chuan Wu Bottom plate structure of a chair
EP3205236A1 (en) 2016-02-15 2017-08-16 Interstuhl Büromöbel GmbH & Co. KG Backrest for an office chair
EP3205235A1 (en) 2016-02-15 2017-08-16 Interstuhl Büromöbel GmbH & Co. KG Seating furniture with a recline stop

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US10820703B2 (en) 2018-09-17 2020-11-03 Sedus Stoll Ag Chair, particularly conference or office chair, and method for manufacturing a chair

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DE29704906U1 (en) * 1997-03-18 1997-05-22 Interstuhl Bueromoebel Gmbh Chair, especially office chair
EP1230876A1 (en) * 2001-02-12 2002-08-14 Interstuhl Büromöbel GmbH & Co. KG Seating furniture

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US4889385A (en) * 1988-03-09 1989-12-26 American Seating Company Chair seat-and-back support
CH700928B1 (en) * 2007-10-12 2010-11-15 Sitag Ag People sitting at a Wippfeder.

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DE29704906U1 (en) * 1997-03-18 1997-05-22 Interstuhl Bueromoebel Gmbh Chair, especially office chair
EP1230876A1 (en) * 2001-02-12 2002-08-14 Interstuhl Büromöbel GmbH & Co. KG Seating furniture

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2529659A (en) * 2014-08-28 2016-03-02 Yao-Chuan Wu Bottom plate structure of a chair
GB2529659B (en) * 2014-08-28 2017-07-12 Wu Yao-Chuan Bottom plate structure of a chair
EP3205236A1 (en) 2016-02-15 2017-08-16 Interstuhl Büromöbel GmbH & Co. KG Backrest for an office chair
EP3205235A1 (en) 2016-02-15 2017-08-16 Interstuhl Büromöbel GmbH & Co. KG Seating furniture with a recline stop
DE102016102557A1 (en) 2016-02-15 2017-08-17 Interstuhl Büromöbel GmbH & Co. KG Seating furniture with a backrest stop
DE102016102556A1 (en) 2016-02-15 2017-08-17 Interstuhl Büromöbel GmbH & Co. KG Backrest for an office chair
US10016061B2 (en) 2016-02-15 2018-07-10 Interstuhl Bueromoebel Gmbh & Co. Kg Backrest for an office chair
US10206513B2 (en) 2016-02-15 2019-02-19 Interstuhl Bueromoebel Gmbh & Co. Kg Piece of seating furniture having a backward-tilt stop

Also Published As

Publication number Publication date
DE102011120753A1 (en) 2013-06-06
EP2787860A1 (en) 2014-10-15
DK2787860T3 (en) 2018-04-16
HUE036791T2 (en) 2018-07-30
ES2663604T3 (en) 2018-04-16
PT2787860T (en) 2018-02-23
EP2787860B1 (en) 2018-01-10

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