DE202009009612U1 - chair - Google Patents

Abstract

Chair with a seat (1) and a seat mechanism (2), wherein the seat mechanism has two lateral, independently responsive and each via a spring mechanism (40, 41) supported support arms (20, 21) to which the seat (1) attached is, wherein the one side of the seat in a lateral pivotal movement of the seat is movable independently of the other side of the seat, characterized in that adjusting means for jointly adjusting the hardness of the two spring mechanisms (41, 41) is provided.

Description

The Invention relates to a chair with a seat and a seat mechanism, wherein the seat mechanism a lateral pivotal movement of the seat allowed.

From practice concepts are known that allow an all-round pivoting of the seat. Here, the pivot joint is centrally near the vertical central axis through the seat (see, for example EP-B-1 051 931 ). However, this mechanical concept has the disadvantage that sitting requires a constant involvement of the user to prevent accidental tipping. Although it is often possible to adjust the flexibility in terms of their hardness, this limits the freedom of movement and thus the adaptation to the body movements of the user.

The US 2004/195882 A1 discloses a chair that allows for lateral pivotal movement with the pivot axis in the center of the seat parallel to the thighs of a user. The seat is divided in the direction of the axis of rotation into several sections, wherein the left and right sides of each section always perform an opposite pivotal movement about the axis of rotation.

Another chair will be in the JP 10 151033 A shown, which is characterized by a right and a left half of the seat, which are independently supported resiliently.

From the US 5,713,632 Another chair is known which has two seat halves, which are each pivotable about an approximately parallel to the thigh of a user extending axis. This chair should allow a comfortable sitting over a longer period.

The EP 1 946 676 A1 discloses a chair with a seat and a seat mechanism, wherein the seat mechanism has two lateral, independently responsive and each supported by a spring mechanism support arms to which the seat is attached, wherein the one side of the seat during a lateral pivotal movement of the seat regardless of the other side of the seat is movable.

outgoing From this prior art, the invention is based on the object adjust the pivoting behavior of the chair in a simple manner to be able to.

According to the invention this object is achieved by the features of claim 1.

Of the Chair according to the invention has a seat and a Seat mechanism on, with the seat mechanism two lateral, independent reacting each other and each via a spring mechanism supported support arms provides, to which the seat attached is, wherein the one side of the seat in a lateral pivoting movement of the seat independent of the other side of the seat is movable. Furthermore, adjusting means for common adjustment provided the hardness of the two spring mechanisms.

The two support arms are thus pivotable independently of each other, the two associated spring mechanisms can but in their hardness together on adjusting be set.

Further Embodiments of the invention are the subject of the dependent claims.

According to one preferred embodiment of the invention, the seat has a seat surface and a backrest, with backrest and Seat are movable relative to each other. Farther the two support arms are preferably at the front end of the seat pivotally mounted on a base support.

A Further embodiment of the invention provides that the spring mechanisms each having a spring element and the adjusting means are formed are that the adjustment of the hardness of the spring mechanisms can be carried out without changing the tension of the spring element is. This is achieved, for example, in that the two Spring elements each with a load transfer element are connected, wherein the respective load transfer element is in operative contact with the associated support arm, that a pivoting movement of the support arm a change in position the load transfer element on a guideway while simultaneously changing the tension of the spring element causes. To adjust the spring mechanism can in particular the guideway adjustable or about a pivot axis be mounted pivotally. The pivot axis of the guideway is arranged so that the adjustment of the hardness of the Spring mechanism causes a pivoting of the guideway without changing the tension of the spring element.

to common adjustment of the two guideways can the adjusting means a sliding Einstellkeil and a rotatable Include threaded rod, the Einstellkeil over the Threaded rod is adjustable.

According to a further embodiment of the invention, at least one of the two support arms is non-rotatably mounted on a rotatably mounted hollow shaft which is in operative contact at one end with the spring armature associated with the support arm and the adjusting means are guided through the hollow shaft. In this way, a very compact implementation of the adjustment is possible.

According to one Another embodiment of the invention, the seat is only in the front Area of its seat connected to the seat mechanism. Furthermore, the seat by means of ball joints on the support arms be held. In this case, a first and second ball joint at the bottom of the backrest of the seat and a third and a fourth ball joint in the front area of the seat of the seat are arranged. Furthermore, the seat mechanism so be formed, that the backrest around the first and second ball joint is pivotable and the backrest and the seat are coupled together such that pivoting the backrest to the rear lifting the Seat causes relative to the support arms. Instead of the Of course, ball joints can also be alternative Connecting elements with similar degree of freedom, z. B. Rubber buffer, to be used.

Further Advantages and embodiments of the invention will be described below the description of some embodiments and the drawings explained in more detail.

In show the drawing

1a - 1c various views (top view, rear view, side view) of a chair according to a first embodiment,

1d and 1e Rear views of the chair in the upright or laterally inclined position,

1f and 1g Side views of the chair in the normal position or in the reclined position,

1h to 1j Side views of the chair in different inclined positions with means according to a second embodiment,

2a partially sectional side view of the chair with illustrated spring mechanism,

2 B a sectional view of the chair in the area of the spring mechanism (slight hardness adjustment)

2c Representation of the spring mechanism according to 2 B with illustrated Einstellkeil,

2d a sectional view of the chair in the spring mechanism (heavy hardness setting),

2e Representation of the spring mechanism according to 2d with illustrated Einstellkeil,

2f a rear view of the chair in the area of the spring mechanism.

The in 1a to 1g illustrated chair according to a first embodiment consists essentially of a seat 1 , a seat mechanism 2 as well as a basic carrier 3 , The seat again has a seat 10 and a backrest 11 on, which are movable relative to each other. The relative mobility can be formed by a suitable pivoting or bending zone, wherein seat 10 and backrest 11 can be formed both in one piece and by separate parts.

Of the Base carrier usually has an arbitrary ausgestaltetes pedestal and serves to hold the Seat and the seat mechanism.

The seat mechanism 2 has in the illustrated embodiment, two lateral, independently responding support arms 20 . 21 on where the seat is 1 is attached. The two support arms 20 . 21 are about a pivot or rotation axis 22 pivotally mounted, wherein the pivot or rotation axis 22 so on the base carrier 3 is held that the pan or rotation axis 22 at the front end of the seat on the base support, that is arranged approximately in the region of the knee axis of a user.

The seat 1 is in the illustrated embodiment by means of ball joints on the support arms 20 . 21 stored. Here is a first and a second ball joint 23 . 24 in the lower part of the backrest 11 and a third and fourth ball joint 25 . 26 in the front area of the seat 10 arranged. The ball joints 23 . 24 respectively. 25 . 26 are each symmetrical to the median plane 4 of the chair. The distance between the first and second ball joints 23 . 24 to the hip joint axis of a user is preferably less than 0.2 m. Furthermore, the distance a of the two ball joints between 0.1 m and 0.5 m.

Furthermore, the seat is 10 in the area of the third and fourth ball joint 25 . 26 and / or the backrest 11 in the area of the first and second ball joint 23 . 24 relative to the carrying arms 20 . 21 slidably supported. In the concrete embodiment, the displaceability of the third and fourth ball joint 25 . 26 provided, which then results when the backrest pivots to the rear or front, as that from which 1f and 1g becomes apparent. The pivotal movement of the backrest not only causes a displacement of the seat forward, but also causes a pivoting of the backrest 11 around the first or second ball joint 23 . 24 , The backrest 11 and the seat 10 are also coupled together such that pivoting the backrest rearwardly causes the seat to lift relative to the support arms. This lifting of the seat takes place mainly in the rear part of the seat, wherein by the simultaneous lowering of the support arms in total a movement of the rear part of the seat 10 down is effected.

The pivoting movement of the backrest 11 to the rear is thus essentially by the pivoting movement of the support arms 10 . 21 around the swivel or rotary axis 22 realized. The displaceability of the ball joints 25 . 26 also allows for reclining an increase in the angle between the seat 10 and backrest 11 ,

According to a second embodiment, the ball joints 25 and 26 at a distance A from the pivot axis 22 arranged. The seat 10 is with respect to the ball joints 25 . 26 slidably supported forward and back, with a rearward displacement without resistance is possible, while a forward displacement by a limitation 27 is limited. The limit 27 can be formed by a fixed or a pressure-resistant stop.

1i shows that an overall inclination or lurching of the seat is possible without resistance, without causing a rotation of the backrest to the ball joints 23 . 24 must come. The angle α1 between seat 10 and backrest 11 can thus be kept constant during this rocking motion.

A rotation of the backrest 11 is always with a shift of the seat with respect to the ball joints 25 and 26 connected. How out 1h is clearly recognizable, are the ball joints 25 and 26 in contact with the limit 27 allowing a sole rotation of the backrest around the joints 23 . 24 from this position is not possible. It is therefore necessary that the seat in turn by the pressure of the limitation 27 against the ball joints 25 . 26 is pressed in a downward slope.

Out This constellation results in a mechanical synchronization of seat tilt and backrest tilt (β1-β2 / α2-α1), which is only effective in one direction. For the user There is the advantage that it is due to the free rocking when settling on the chair comfortable rebound, without the backrest contact to lose, and yet to sit back while one mechanical synchronization with harmonious and defined course of seat tilt and backrest tilt is available.

in the Related to the characteristic of independent movement from right and left seat side is this second embodiment the invention in a position to lateral weight shifts by one-sided seat tilt to react without that the user loses the backrest contact.

The two support arms 20 . 21 are each using a suitable spring mechanism 40 . 41 in the normal position, ie in the upright position, according to 1f pressed.

The two support arms can both together, ie synchronously without pivot or rotation axis 22 as well as independently of each other about the pivot or rotation axis 22 swing. This independent pivoting allows lateral pivoting of the seat, as in 1e relative to the straight position according to 1d is shown. In addition to the independently responding support arms 20 . 21 is also the seat itself designed such that one side, ie the left or right side of the seat in the lateral pivoting movement is independent of the other side of the seat movable. In other words, not the entire seat is tilted sideways, but it comes in particular to an independent movement of the right and left half of the seat, in particular the seat. In the illustrated embodiment, the pivot or rotation axis 22 rigid and also the articulation to the seat allows only about a horizontal displacement of the seat, but no lowering of the seat in its front area. With a lateral pivoting of the seat, as in 1e is shown, it thus comes to a twisting of the seat, in particular the seat. Of course, can be superimposed in this movement additionally also pivoting and or twisting of the backrest.

2a again shows a slightly more detailed side view of the chair, in particular those in the base support 3 housed spring mechanisms 40 . 41 can be seen. The chair shown is, for example, an office chair with a swivel base 5 ,

The two support arms 20 . 21 are each about a spring mechanism 40 . 41 supported. In this way, the two support arms can react independently, so that one side of the seat is movable in a lateral pivotal movement of the seat independently of the other side of the seat. The two spring mechanisms are constructed identically and essentially each consist of a spring element 42 . 42 ' , a related NEN load transfer element 43 . 43 ' one with the respective support arm firmly connected load lever 44 . 44 ' and one guideway each 45 , The following is the spring mechanism 40 based on 2 B to 2e described in more detail.

The spring element 42 is from a penholder 46 held and supports with its end on an abutment 47 of the basic carrier 3 and with its other end on a flange 46a of the spring holder 46 from. At the opposite end of the spring holder 46 is the load transfer element 43 attached, which can be formed for example by one or more rollers or rollers. The penholder 46 is in the passage of the abutment 47 freely guided and can thus change the position of the load transfer element 43 comprehend.

In a pivoting movement of the support arm 20 respectively. 21 around the pivot axis 22 becomes the associated load lever 44 moved synchronously and presses on the load transfer element 43 this being on the guideway 45 a change in position with simultaneous change in voltage of the spring element 43 performs. Will thus the support arm 21 in 2 B in the direction of the arrow 48 pivoted, the load transfer element moves 43 in the direction of the arrow 49 and the spring element 42 will be in the direction of the arrow 50 compressed. Leaves the pressure on the support arm 21 after, presses the spring element 42 the load transfer element 43 and thus the load lever 44 and the support arm 21 back in the 2 B shown neutral position.

To adjust the chair to different user weights or habits adjusting means are provided for the common adjustment of the hardness of the two spring mechanisms. Another special feature is that the hardness of the spring mechanisms without changing the tension of the spring element 42 is adjustable. The adjustment takes place in that the guideway 45 or the element having the guideway 45a adjusted, in particular, is pivoted. In 2d is the guideway 45 or that the guideway having element 45a in one opposite the 2 B changed position is shown.

Thus an adjustment of the guideway 45 no voltage change of the spring element 42 causes the axis of rotation lies 45b the guideway 45 in the region of the load transfer element 43 if this is in the 2 B shown neutral position is located.

For pivoting the guideway 45 and thus for adjusting the hardness of the spring mechanisms adjustment means are provided, which in the illustrated embodiment, inter alia, a Einstellkeil 51 and a threaded rod 52 include ( 2c . 2e ), with a twist of the threaded rod 52 an adjustment of the adjusting wedge 51 along the threaded rod between the two in the 2c and 2e shown positions causes. The adjusting wedge 51 is in contact with the guideway 45 having element 45a , wherein an adjustment of the adjusting wedge 51 along the threaded rod 52 a rotation of the element 45a around the axis of rotation 45b (please refer 2 B . 2d ) causes. When setting the guideway 45 according to 2 B the spring mechanism is adjusted more easily than in the position according to 2d , The support arm 21 settles in the position of the guideway 45 according to 2 B thus easier to lower from the neutral position to an inclined position.

Like from the 2a and 2f will be apparent, are the two spring mechanisms 40 . 41 for the two support arms 20 . 21 approximately in the middle under the seat 10 in the basic carrier 3 arranged.

The element 45a is designed so that it is both a guideway 45 for the load element 43 the spring mechanism 40 as well as a guideway for the load transfer element 43 ' in the spring mechanism 41 provides. It is thus only an adjustment wedge 51 required, over the threaded rod 52 is adjustable.

Out 2f will also be apparent that the load transfer element 43 respectively. 43 ' is formed in each case by three rollers or rollers arranged in an axis, wherein the two outer rollers with the load lever 44 and the middle roller come into contact with the respective guideway. You can see in 2f in addition, that the pivot axis 45b of the element 45a approximately in the area of load transfer elements 43 . 43 ' lies.

The adjusting means further comprise a transmission element 43 , which at its end via a bevel gear with the threaded rod 52 is in communication and at the other end an adjustment 54 , In particular, a rotary handle is provided. The transmission element 53 extends perpendicular to the threaded rod 52 to the outside, so that a user sitting on the chair very comfortable and without effort the hardness adjustment of the two spring mechanisms 40 . 41 can make.

According to a preferred embodiment of the invention, the connection between the guideway element having 45a and the adjusting wedge 51 self-locking, so that an additional locking of the adjustment 54 is not required.

While the two spring mechanisms in the middle of the central pivot axis 22 vorgese hen, are the two pivot arms 20 . 21 further outside. It is therefore necessary that the support arms 21 suitably with the two spring mechanisms 40 . 41 be coupled. This is in the present case by two waves, in particular hollow shafts 55 . 56 reached in the area of the central axis 22 are mounted rotatably in a suitable, not shown manner. The one end of each shaft is with the associated support arm 20 . 21 rotatably connected, while at the end of the load lever 44 respectively. 44 ' rotatably connected to the corresponding shaft. The two load levers thus act with one of the two spring elements 42 . 42 ' in the manner already explained above together.

The trained as a shaft transmission element 53 is through the hollow shaft 56 passed through, so that results in an extremely compact arrangement.

By The above-described spring mechanisms can both laterally arranged support arms moved independently become. However, the adjustment described above still cause a common adjustment of the hardness of the spring mechanisms.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1051931 B [0002]
• US 2004/195882 A1 [0003]
• - JP 10151033 A [0004]
• US 5713632 [0005]
• EP 1946676 A1 [0006]

Claims (17)

Chair with a seat ( 1 ) and a seat mechanism ( 2 ), wherein the seat mechanism two lateral, independently responsive and each via a spring mechanism ( 40 . 41 ) supported support arms ( 20 . 21 ) to which the seat ( 1 ), wherein the one side of the seat is movable in a lateral pivoting movement of the seat independently of the other side of the seat, characterized in that adjusting means for jointly adjusting the hardness of the two spring mechanisms ( 41 . 41 ) is provided. Chair according to claim 1, characterized in that the seat ( 1 ) a seat ( 10 ) and a backrest ( 11 ), wherein the backrest and seat are movable relative to each other. Chair according to claim 1, characterized in that the two support arms ( 20 . 21 ) at the front end of the seat ( 1 ) to a basic carrier ( 3 ) are pivotally mounted. Chair according to claim 1, characterized in that the spring mechanisms ( 40 . 41 ) each have a spring element ( 42 . 42 ' ) and the adjusting means are designed such that the adjustment of the hardness of the spring mechanisms without changing the tension of the spring element is feasible. Chair according to claim 1, characterized in that at least one of the two support arms ( 20 . 21 ) rotatably on a rotatably mounted hollow shaft ( 55 . 56 ) is attached, which at one end with the support arm ( 20 . 21 ) associated spring mechanism ( 40 . 41 ) is in operative contact and the adjusting means are passed through the hollow shaft. Chair according to claim 1, characterized in that the two spring mechanisms ( 40 . 41 ) each have a spring element ( 42 . 42 ' ) and an associated load transfer element, wherein the load transfer element ( 43 . 43 ' ) is in operative contact with the associated support arm such that a pivoting movement of the support arm causes a change in position of the load transfer element on a guideway ( 45 ) with simultaneous change in voltage of the spring element ( 42 . 42 ' ) causes. Chair according to claim 6, characterized in that the load transfer device ( 43 . 43 ' ) is formed by at least one roller. Chair according to claim 6, characterized in that the guideway ( 45 ) is adjustable to adjust the hardness of the spring mechanism. Chair according to claim 6, characterized in that the guideway ( 45 ) is adjustable to adjust the hardness of the spring mechanism by the adjusting means. Chair according to claim 6, characterized in that the guideway is pivotally mounted about a pivot axis is. Chair according to claim 10, characterized in that the pivot axis ( 45b ) of the guideway ( 45 ) is arranged so that the adjustment of the hardness of the spring mechanism, a pivoting of the guideway ( 45 ) causes without changing the tension of the spring element. Chair according to claim 6, characterized in that the adjusting means for common adjustment of the two guideways ( 45 ) of the two spring mechanisms ( 40 . 41 ) have a sliding Einstellkeil. Chair according to claim 12, characterized in that the adjusting means further comprise a rotatable threaded rod ( 52 ), wherein the adjusting wedge ( 31 ) is adjustable via the threaded rod. Chair according to one or more of the preceding claims, characterized in that the seat ( 1 ) only in the front region of its seat ( 10 ) with the seat mechanism ( 2 ) connected is. Chair according to one or more of the preceding claims, characterized in that the seat ( 10 ) by means of ball joints ( 23 . 24 . 25 . 26 ) on the support arms ( 20 . 21 ) is held. Chair according to claim 1, characterized in that a first and a second ball joint ( 23 . 24 ) in the lower part of a backrest ( 11 ) of the seat and a third and a fourth ball joint ( 25 . 26 ) in the front area of a seat ( 10 ) of the seat are arranged. Chair according to claim 16, characterized in that the backrest ( 11 ) around the first and second ball joint ( 23 . 24 ) is pivotable and the backrest ( 11 ) and the seat ( 10 ) are coupled together in such a way that pivoting the backrest to the rear, a lifting of the seat relative to the support arms ( 20 . 21 ) causes.