EP1230876A1 - Seating furniture - Google Patents

Abstract

The chair has a seat (7) which is mounted on a support frame (10). A lever (12) connects its back edge to the frame and its front edge is connected to it by a leaf spring (15) which biases it towards the rear and also acts as a guide for it when it moves forward.

Description

The invention relates to seating furniture according to the preamble of Claim 1.

DE 196 07 136 A1 describes a chair with a so-called Synchronous mechanism known. The synchronous mechanism works with Lean back in the chair next to a tilting movement of the Backrest lowering the seat element in a rear seating area close to the backrest and that Raise the seat element in a front of the backrest distant seating area. This conveys the seated person when Lean back the impression of sliding into the chair and not the feeling of slipping off the chair in the direction of the seat. By a spring element, which is in the front seating area the suspension arranged on the seat element will work Seat element placed in the starting position. Against this force, which the seat element and the backrest in the Starting position must be one of the sitting person Force against the backrest or against the spring element be applied to tilt the chair or a To achieve change in the angular position of the seat element. A movement of the seat element is essentially only through loading or unloading the backrest possible. The front one The area of the seat element is fixed in a predetermined Position when the backrest is not loaded. The movements of the Seat elements are fixed by levers and / or guides specified. The invention is the known chair be further improved.

The invention is based on the object of seating develop that beyond the convenience of synchronous mechanics further comfort properties in the area of the seating element Provides and a simplified synchronous mechanism having.

This task is based on the characteristics of the Preamble of claim 1 according to the invention characterizing features of claim 1 solved. In the Subclaims are advantageous and expedient Further training specified.

The seating furniture according to the invention has the front Fastening means for the seat element the spring element, which is supported on the fixed support frame, whereby the spring element to the known reset function the guidance of the seat element in its front area takes over. This eliminates the components for a Holding and guiding the spring element in the from DE 196 07 136 A1 known chair with synchronous mechanism are required to direct the force of the spring and around to control part of the movement of the seat element. Furthermore, such a double function or Double action of the spring also the comfort or suitability of the Chair for people of all sizes and all body weights increase. This is because the opening angle between the seat element and Backrest by the type of installation of the invention Spring element no longer solely by the size of the force against the backrest and thus also the inclination of the chair is determinable. An increase in the opening angle between the seat element and backrest, which are often from heavy people with a larger body volume are desired, is now largely automatic because the Person with a larger body weight and body volume greater force affects the spring element and this in Contrary to that known from DE 196 07 136 A1 Spring element has freedom in approximately the vertical direction dodge. This causes the seat element to move forward tilted or sinks in the front area and it results yourself regardless of the position and load of the backrest an enlarged opening angle between the backrest and Seat element. In addition to this comfort for people with great Body weight and body volume are another Advantage for a person in the front area of the Seat element sits. Such a sitting position is often given to people who work on the computer. In a such working posture it is considered by the seated person felt pleasant when the seat slightly forward is inclined. This orientation of the seat means is again by the additional degree of freedom of the invention Given spring element. Who in such a sitting position Person pushing the seating element pushes even at low Body weight as a result of the above in this posture Front edge of the seat element lying center of gravity the spring element down so that the desired Adjust the inclination of the seat element to the front. This position the seat element facilitates and favors one after medical aspects favorable posture in which the seated person's pelvis is tilted forward.

An advantageous embodiment of the subject of the invention sees before designing the spring element as a leaf spring, which itself preferably extends in the seat direction and is bent. A Leaf spring, d. H. a single leaf spring or a Leaf spring assembly meets the requirements for the spring element ideally because the curved leaf spring compressive forces in exercises the two required directions. On the one hand it works the leaf spring up. As a result, the seat element in front area raised or held. On the other hand, it works the leaf spring to the front in the sitting direction. This is it Force is applied to the seat element to the front and thus acts a decrease in the rear seating area. So it stops the leaf spring the seat element and with this also with this directly or indirectly connected backrest in one front stop or reset position. A lean back leads into the chair depending on the shape or bend of the Leaf spring next to a drop in the rear seating area lifting the front seating area or to one Remain at the same height as the front seating area.

An adjustability of the spring element allows that Behavior of the seating element optimally to the requirements or Adjust the wishes of the seated person. In particular, can this also enables a small, light person without tipping back the opening angle between Enlarging the seat and backrest. Of course it is about adjusting the force of the spring element too possible the willingness to tip or the tipping behavior of the chair to influence.

According to a particular embodiment of the invention it is provided the spring force of the leaf spring by a Displacement of the spring contact point and / or a Changing the distance between each Varying spring leaves. These adjustments can be made through particularly simple and therefore inexpensive Realize adjustment mechanisms.

Furthermore, it is advantageous as spring elements Coil springs and / or rubber elements and / or Vibrating metals and / or hydraulic cushions and / or pneumatic pillows or a combination of these use. These spring elements allow adjustment the different requirements and installation options.

It when the invention at a Chair with a backrest that is used over a Backrest support with the means to transmit motion connected is. With such an arrangement, a chair is created in which, in addition to the comfort functions of the invention Comfort known from the prior art completely preserved.

It is also proposed a chair with the equip comfort functions according to the invention, in which the Backrest is directly connected to the seat element. This makes a mechanically particularly simple and therefore inexpensive chair formed with high comfort. At a in the transition area from the seat element to the backrest elastic chair creates seating that, despite simple Construction approximates the comfort of the chair described above having.

By using a seat element that consists of a Base plate and a slidably arranged thereon If there is a cushion, the chair can be placed in the seating area optimal on the required contact surface for the To adapt the thigh to the person sitting on the chair. This makes the chair suitable for people different body sizes and body weights elevated.

Further details of the invention are shown in the drawing based on schematically illustrated embodiments described.

Figur 1

eine Seitenansicht eines ersten erfindungsgemäßen Bürostuhls in der vorderen Anschlagposition,

Figur 2

eine Seitenansicht des in Figur 1 dargestellten Bürostuhls in der hinteren Anschlagposition,

Figur 3

eine Draufsicht auf den in Figur 1 dargestellten Bürostuhl,

Figur 4

eine Seitenansicht eines zweiten erfindungsgemäßen Bürostuhls in der vorderen Anschlagposition,

Figur 5

eine Seitenansicht des in Figur 4 dargestellten Bürostuhls in der hinteren Anschlagposition,

Figur 6

eine Draufsicht auf den in Figur 4 dargestellten Bürostuhl,

Figur 7

eine Seitenansicht eines dritten erfindungsgemäßen Bürostuhls in der vorderen Anschlagposition,

Figur 8

eine Seitenansicht des in Figur 7 dargestellten Bürostuhls in der hinteren Anschlagposition,

Figur 9

eine Draufsicht auf den in Figur 7 dargestellten Bürostuhl,

Figur 10

eine Seitenansicht eines vierten Bürostuhls in der vorderen Anschlagposition,

Figur 11

eine Seitenansicht des in Figur 10 dargestellten Bürostuhls in der hinteren Anschlagposition,

Figur 12

eine Draufsicht auf den in Figur 10 dargestellten Bürostuhl,

Figur 13

eine Seitenansicht eines fünften erfindungsgemäßen Bürostuhls in der vorderen Anschlagposition,

Figur 14

eine Seitenansicht des in Figur 13 gezeigten Bürostuhls in der hinteren Anschlagposition,

Figur 15

eine Draufsicht auf den in Figur 13 dargestellten Bürostuhl,

Figur 16

eine Seitenansicht eines sechsten erfindungsgemäßen Bürostuhls in der vorderen Anschlagposition,

Figur 17

eine Seitenansicht des in Figur 16 dargestellten Bürostuhls in der hinteren Anschlagposition und

Figur 18

eine Draufsicht auf den in Figur 16 dargestellten Bürostuhl.

Here shows:

Figure 1

a side view of a first office chair according to the invention in the front stop position,

Figure 2

2 shows a side view of the office chair shown in FIG. 1 in the rear stop position,

Figure 3

2 shows a top view of the office chair shown in FIG. 1,

Figure 4

a side view of a second office chair according to the invention in the front stop position,

Figure 5

3 shows a side view of the office chair shown in FIG. 4 in the rear stop position,

Figure 6

3 shows a plan view of the office chair shown in FIG. 4,

Figure 7

a side view of a third office chair according to the invention in the front stop position,

Figure 8

7 shows a side view of the office chair shown in FIG. 7 in the rear stop position,

Figure 9

3 shows a plan view of the office chair shown in FIG. 7,

Figure 10

a side view of a fourth office chair in the front stop position,

Figure 11

10 shows a side view of the office chair shown in FIG. 10 in the rear stop position,

Figure 12

10 shows a plan view of the office chair shown in FIG. 10,

Figure 13

a side view of a fifth office chair according to the invention in the front stop position,

Figure 14

12 shows a side view of the office chair shown in FIG. 13 in the rear stop position,

Figure 15

3 shows a plan view of the office chair shown in FIG. 13,

Figure 16

a side view of a sixth office chair according to the invention in the front stop position,

Figure 17

a side view of the office chair shown in Figure 16 in the rear stop position and

Figure 18

a plan view of the office chair shown in Figure 16.

FIG. 1 shows a side view of a piece of seating furniture 1 which is designed as an office chair 2. The office chair 2 consists essentially of a bogie 3 with rollers 4, which is height-adjustable and rotatably connected via an axis 5 to a support frame 6, a seat element 7 fastened to the support frame 6 and a seat element 7 connected to the support frame 6 via a backrest support 8 Backrest 9. The support frame 6 consists of a rigid support 10, which receives the axis 5, means 11 for transmitting a movement, which are designed as levers 12, and a front fastening means 14, which is designed as a spring element 15. The seat element 7 consists of a support 16 and a base plate 17. The support 16 can be moved and locked relative to the base plate 17 in the seat direction A between a first position P and a second position P '. With such an adjustment, the contact surface for the thighs of a person sitting on the office chair 2 can be individually adjusted. On the seat element 7 or on the base plate 17, front flange means 19, 20 are attached in a front seat area 18 and rear flange means 22, 23 in a rear seat area 21 (see also FIG. 3). The front flange means 19, 20 each receive a spring element 15, the spring elements 15 being designed as leaf springs 24, 25. The leaf springs 24, 25 act like resilient cantilever arms, at the free ends of which the seat element 7 is rotatably articulated via the front flange means 19, 20. In FIG. 1, the office chair 2 is shown in an upright or front stop position I, which it assumes in a state in which it is not loaded by a person, that is to say it is not loaded. In this front stop position I, the spring elements 15 raise the seat element 7 to a height H by a vertically acting force F _z in the direction of the arrow z. Furthermore, a horizontal force F _{x of} the spring elements 15 pulls the seat element 7 in the direction of the arrow x into the position I shown in FIG. 1. This tensile force also acts on the lever 12 and the backrest support 8 about the axis 26 via the rear flange means 22, 23 are rotatably hinged to the carrier 10. A circular path K is defined via the lever 12, on which an axis 27, via which the rear flange means 22, 23 are connected to the levers 12 or the backrest support 8, can move. By loading the office chair 2 with a force F _s by a person sitting on the office chair 2, the seat element 7 rotates essentially counterclockwise around the bearing point 27 until the proportion of the force, due to the portion of the force F _s acting in the front seating area F _s is counterbalanced by the force F _{z of} the spring elements 15 counteracting this. The portion of the force F _s acting in the rear seat area is transferred via the levers 12, the support frame 10, the axle 5 and the bogie or causes a tensile force on the spring element 12 via the lever 12, which is compensated for by its force component F _x . Depending on the acting forces F _s and F _z, this results in an inclined position of the seat element 7 in, for example, an inclined position 28 indicated by a broken line. This increases an opening angle α enclosed between the backrest 9 and the seat element 7 to an opening angle α '. The seat element 7 can be lowered by a person who has contact with the back to the backrest 9 as well as a person who is seated exclusively in the front seat area 18. In this case, the same person will of course bring about a greater inclination of the seat surface 7 if it is seated exclusively in the front seat area 18, since then a larger proportion of the body weight acts on the spring elements 15.

FIG. 2 shows the office chair 2 shown in FIG. 1 in a rear stop position II. The office chair 2 is held in this position by a force F _R exerted by the seated person and acting on the backrest 9. This force F _R is compensated for by the force F _{x of} the spring elements 15. The movement of the backrest 9 and the seat element 7 is thus limited by the spring element 15. Essentially, the force F _R is transmitted via the backrest support 8 and the seat element 7 as a tensile force to the spring elements 15, the axis 27 having assumed the position shown in FIG. 2 by rotating on the circular path K from the position shown in FIG. 1. The force F _R thus causes the synchronous mechanism, ie the special connection of the backrest 9 and the seat element 7, in addition to the rotation of the backrest 9 in the clockwise direction and also a movement of the axis 27 in the clockwise direction on the circular path K, which is caused by a rotation of the seat element 7 in Clockwise around axis 27 is accompanied. This results in the sinking of the seat element 7 in the rear seat area 21 and lifting of the seat element 7 in the front seat area 18, which is typical for the synchronous mechanism. These movements generated by the synchronous mechanism are superimposed by a further movement which is made possible by the unguided spring element. The further movement results from the fact that the seated person acts on the seat surface 7 with a force F _s , the part of this force acting here in the front seat area 18 is absorbed by the force F _{z of} the spring elements 15. Depending on the magnitudes of the acting forces F _s and F _z , this results in an opening angle α that is different from the opening angle α shown in FIG. The opening angle is thus not determined solely by the synchronous mechanism, but is essentially also a function of the forces F _S and F _Z.

FIG. 3 shows a top view of the one in FIG. 1 Office chair 2 shown, here on the representation of the The bogie and castors were dispensed with, however further components lying under the seat element 7 are shown. This is in the area of the backrest 9 Representation also simplified. The carrier 10 is U-shaped trained and takes the spring elements 15 each at free Legs 29, 30 on. The backrest support 8 is in the area the rear flange means 22, 23 and the lever 12 as a fork 31 executed.

Figures 4 to 6 show a second office chair 32. Im Difference to that shown in Figures 1 to 3 Office chair 2 has this means 33 for adjusting the Spring force of a spring element 15. As a means 33 for the Adjustment of the spring force is a tensioning device 34 provided, which has a handwheel 35 over which one does not Tightening screw shown is actuated, through which the Distance between individual spring leaves 36 of the spring element 15 is changeable. A smaller distance between the Spring leaves 36 cause a greater resilience of the Spring element 15. Furthermore, the differs in the Figures 4 to 6 shown office chair 32 of the in the Figures 1 to 3 shown office chair 2 in that for the cushioning of a seat element 7 only one spring element 15 is used. This can make it particularly slim Structure of the office chair 32 take place.

Figures 7 to 9 show a third office chair 37. Im Difference from the second shown in Figures 4 to 6 Office chair 32 is a spring element 15 as a rubber element 38 or Schwingmetall 39 executed. As a vibrating metal is a plastic element mounted between two metal plates, designated in particular rubber element. The spring element 15 has spring properties acting in directions x and z. A spring in a transverse direction y is due to the mechanical Connection of a seat element 7 via lever 12 to a carrier 10 prevented. If the office chair 37, as in FIG. 8 shown in a rear stop position II, then the spring element 15 is subject to shear stress. This occurs in all positions in which the office chair 37 a Assumes position in which a backrest 9 opposite the in Figure 7 shown position is inclined.

In Figures 10 to 12 is analogous to that in the Figures 7 to 9 shown third office chair 37 a fourth Office chair 40 shown. In this, the spring element 15 as Coil spring 41 executed. In terms of how it works reference is made here to the description of FIGS. 7 to 9 referred, since the coil spring 41 is comparable to that Rubber element 38 or the vibrating metal 39 behaves.

A fifth office chair 42 is shown in FIGS. In contrast to the office chairs shown in FIGS. 1 to 12, the office chair 42 has a seat shell 43. The seat shell 43 consists of a backrest 9 which is integrally connected to a seat element 7. The seat shell 43 is elastic or resilient in a transition region 44. A partial function of the synchronous mechanism, namely the enlargement of an opening angle α between the backrest 9 and the seat element 7, takes over the flexible or elastic transition area 44 in the office chair 42, which causes the backrest 9 to spring back as a function of a force F _R acting thereon, which depends on a person sitting on the office chair 42 goes out. As with the office chairs described in FIGS. 1 to 12, the force F _R causes the seat pan 43 to drop in a rear seat area 21 and a raise in a front seat area 18 depending on a counterforce F _x generated by a spring element 15. A weight force F _s originating from a seated person or its portion acting in the front seat area 18 leads to a lowering of the seat element 7 in the counterclockwise direction. In the office chair 42, this causes the backrest to be carried at least to the extent that the opening angle α of the seat shell 43 is not increased by an increasing force F _R acting on the backrest 9.

A sixth office chair 45 is shown in FIGS shown. The office chair 45 has the same as that in FIGS Figures 13 to 15 shown fifth office chair 42 a Seat shell 43, which consists of a seat element 7 and a Backrest 9 is resilient in a transition area are connected. In contrast to those in Figures 1 to 15 Office chairs shown is rotatable in the office chair 45 articulated lever, which as a means 11 for transmitting a Movement is used, replaced by guides 13. The guides 13 are realized as elongated holes 46 which 47 on arms are executed. The arms 47 are fixed to a support 10 connected. Via a continuous axis 27 are rear Flange means 22, 23 which are fixed to the seat shell 43 in Connected, stored in the elongated holes 46.

The invention is not shown or described on Embodiments limited. Rather, it encompasses Developments of the invention in the context of Patent claims. In particular, it is provided that arrangement of a spring element according to the invention To make seating furniture that does not have a bogie, but have legs or feet and / or firm are mounted.

LIST OF REFERENCE NUMBERS

1

seating

2

Office chair (first)

3

bogie

4

role

5

axis

6

supporting frame

7

seat element

8th

Backrest support

9

backrest

10

carrier

11

medium

12

lever

13

guide

14

front fastener

15

spring element

16

edition

17

baseplate

18

front seating area

19

front flange means

20

front flange means

21

rear seating area

22

rear flange means

23

rear flange means

24

leaf spring

25

leaf spring

26

axis

27

axis

28

inclination

29

leg

30

leg

31

fork

32

Office chair (second)

33

medium

34

jig

35

handwheel

36

spring leaf

37

Office chair (third)

38

rubber element

39

Schwingmetall

40

Office chair (fourth)

41

coil spring

42

Office chair (fifth)

43

seat

44

Transition area

45

Office chair (sixth)

46

Long hole

47

boom

Claims (9)

Seating (1; 2, 32, 37, 40, 42, 45) with a seat element (7), a backrest (9) and a support frame (6), the support frame (6) being a support (10) and a mechanical means (11) for transmitting a movement such as lever (12) and / or guide (13, 46), which connects the carrier (10) in a rear seat area (21) to the seat element (7), at least one spring element (15 ; 24, 25, 38, 39, 41) is provided, which moves the seat element (7) into a stop or reset position (I), characterized in that the spring element as the front fastening means (14) for the seat element (7) (15; 24, 25, 38, 39, 41) is provided, which is mounted on the fixed support (10), the spring element (15; 24, 25, 38, 39, 41) in addition to the known reset function also Guidance of the seat element (7) in its front region (18) is determined. Seating furniture according to claim 1, characterized in that the spring element (15) is designed as a leaf spring (24, 25) which preferably extends in the seat direction (A) and is in particular clamped on one side. Seating furniture according to one of the preceding claims, characterized in that the spring force of the spring element (15; 24, 25, 38, 39, 41) is adjustable. Seating furniture according to one of the preceding claims, characterized in that the spring force of the leaf spring (24, 25) is adjustable by displacing a spring support point. Seating furniture according to one of the preceding claims, characterized in that the spring force of the leaf spring (24, 25) can be changed by changing the distance between the individual spring leaves (36). Seating furniture according to one of the preceding claims, characterized in that the spring element (15) is designed as a helical spring (41) and / or rubber element (38) and / or oscillating metal (39) and / or hydraulic cushion and / or pneumatic cushion. Seating furniture according to one of the preceding claims, characterized in that the backrest (9) is fastened to a backrest support (8) which is connected to the means (11) for transmitting movement. Seating furniture according to one of the preceding claims, characterized in that the backrest (9) is fastened to the seat element (7), the back element (9) and the seat element (7) preferably forming a seat shell (43) which, in particular, has a sprung and / or or elastic transition region (44). Seating furniture according to one of the preceding claims, characterized in that the seat element (7) comprises a support (16) and a base plate (17) which are displaceable relative to one another.

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