EP2596721B1 - Chair and seating arrangement - Google Patents

Description

The invention relates to a chair, in particular an office chair. Furthermore, the invention relates to a seat arrangement, in particular for an office chair.

Chairs have long been known through public prior use. The chairs can include seats that are adjustable in their inclination.

So is out of the US 4,153,294 a device for adjusting the inclination of the arranged on a support plate seat cushion known. On a threaded spindle while a mother sits, which is axially adjustable by turning a threaded spindle attached to the handwheel. The nut acts via a cross bar with an intermediate plate that supports the seat cushion. An axial displacement of the nut causes a tilting of the intermediate plate and thus a change in the inclination angle of a seat cushion surface.

The EP 1 310 227 A2 discloses a seatable device for assisting a user in standing up. The seat assist device comprises a seat carrier and a seat, which are hinged together at a pivot point. There is also a rotationally driven drive spindle on which a drive nut sits. The drive nut is firmly connected to a cross member. The cross member interacts with the seat carrier. An axial movement of the cross member causes a tilt adjustment of the seat.

The invention has for its object to provide a chair whose seat in a particularly simple manner adjustable in inclination and is determinable. In addition, the seat inclination should be extremely reliable adjustable and fixable. A corresponding seat arrangement should also be created.

This object is achieved by the features specified in the independent claims 1 and 13 features. The essence of the invention is that a seat inclination adjustment device comprises two displaceable by an actuating rod or sliding adjustment slide. The actuating rod and the adjusting slide are each provided with threads that are threaded together to move the adjusting slide. The at least one adjustment ramp of the adjusting slide acts on actuation of the seat for pivoting the same. The at least one adjustment ramp runs obliquely with respect to the movement direction of the adjustment slide.

The inventive provision of a first actuating rod partial thread and a second actuating rod partial thread in different areas of the actuating rod is made possible that two adjusting slide are arranged in different areas of the actuating rod. This allows the adjustment slides attack at different locations on the seat, whereby the tilt adjustment of the seat is particularly reliable and efficient.

Preferably, the adjusting slides are guided synchronously or jointly displaceable by the actuating rod. It is advantageous if the adjusting carriages are displaceably guided on the seat carrier. Conveniently, the actuating rod extends in a transverse direction of the chair between two side regions.

Further advantageous embodiments of the invention are specified in the subclaims.

Due to the configuration of the adjusting slide thread according to claim 2, an extremely simple construction of the seat tilt adjustment device can be achieved. More specifically, the internal thread is formed on a guide channel limiting wall of the adjustment slide. Preferably, then the actuating rod thread is formed as an external thread. The guide channel ensures safe guidance or movement of the adjustment slides on the actuating rod. A reverse arrangement of the thread is alternatively possible.

According to claim 3, the recliner slide is disposed along the actuating rod between a first position in which a seat is in a low position and a lower position, and a second position in which the seat is in a high position or upper position is, relocatable. Such an arrangement is extremely simple and can be implemented with few components. Preferably, the positions are transverse positions of the chair.

It is advantageous if the adjustment slides in their displacement towards the second position, the seat in its high position. Preferably, the adjustment slides allow a lowering of the seat when displaced in the direction of the first position.

Characterized in that according to claim 4, the first actuating rod partial thread is formed in the opposite direction to the second actuating rod partial thread, is made possible that the adjusting slide along the actuating rod both movable toward and away from each other, thereby facilitating seat-tilt adjustment.

The embodiment according to claim 6 provides that the seat is secured to the seat support. It is advantageous if the seat is secured both during its adjustment and during its non-adjustment to the seat support. The adjustment fuse preferably forms a seat lift-off fuse. This prevents the seat from the seat support can be lifted.

According to claim 7, the at least one transfer slope runs obliquely with respect to the direction of movement of the adjustment slide. It can be provided directly on the seat. The transfer bevel may also be formed on a separate component, which is then attached to the seat. It preferably extends obliquely with respect to a horizontal. The transfer slope and the associated adjustment ramp preferably run substantially parallel to each other.

The provided according to claim 8 guide means is preferably formed as a guide recess. An alternative training as a leadership advantage is possible. The guide means serves to guide the seat during its adjustment.

According to claim 9, the transfer slope is provided in a first, preferably rear seat region of the seat, wherein the seat is pivotally mounted in a second, preferably front, seat region on the seat support. In an adjustment of the seat, the seat is preferably pivoted about a pivot axis which is provided in the second seating area for pivotal mounting of the seat. It is an advantage when the pivot axis is also in a front region of the seat support. A reverse arrangement is alternatively possible.

It is advantageous if the adjustment-securing body according to claim 10 is elongate and extends parallel, but spaced from the adjustment ramp. Preferably, the transfer bevel has at least one corresponding securing area or securing web for interacting with the at least one adjustment securing body. It is advantageous if the at least one securing area or securing web is arranged between the at least one adjusting securing body and the at least one adjusting ramp.

The embodiment according to claim 11 is extremely space-saving and visually appealing.

According to the embodiment according to claim 12, the seat tilt adjustment device is actuated independently of a seat height adjustment device and / or a backrest adjustment device. The seat height adjustment device, by means of which the seat height of the seat is adjustable, and / or the backrest adjustment device, by means of which the inclination of a backrest with respect to the seat is adjustable, are preferably also between the seat and the seat Carrier arranged. The independent design of the recliner / pitch adjustment device and devices results in the chair being very precisely adaptable to individual requirements by the user.

A combination of subclaims 2 to 12 with independent claim 13 is possible.

Fig. 1

eine perspektivische, vereinfachte Ansicht eines erfindungsgemäßen Stuhls,

Fig. 2

eine Seiten-Ansicht des in Fig. 1 vereinfacht dargestellten Stuhls,

Fig. 3

eine Ansicht, die den Sitz-Träger und den Sitz des in Fig. 1 und 2 dargestellten Stuhls von unten zeigt,

Fig. 4

einen Stufen-Schnitt durch den Sitz und den Sitz-Träger gemäß der Schnittlinie IV-IV in Fig. 3, wobei sich der Sitz in seiner Tief-Stellung befindet,

Fig. 5

einen Schnitt, der dem Schnitt gemäß Fig. 4 im Wesentlichen entspricht, wobei sich der Sitz in seiner Hoch-Stellung befindet,

Fig. 6

eine perspektivische Ansicht von zwei Verstell-Schlitten und einer Betätigungs-Stange des in den Fig. 1 und Fig. 2 gezeigten Stuhls,

Fig. 7

die in Fig. 6 dargestellte Anordnung in einer gedrehten Stellung,

Fig. 8

eine Explosions-Ansicht, die die Anordnung von Fig. 6 bzw. 7 zwischen dem Sitz-Träger und dem Sitz des erfindungsgemäßen Stuhls zeigt,

Fig. 9

eine der Fig. 8 entsprechende Ansicht von einer anderen Seite, und

Fig. 10

einen Schnitt durch die Sitz-Anordnung des erfindungsgemäßen Stuhls entlang der Betätigungs-Stange.

Hereinafter, a preferred embodiment of the invention will be described by way of example with reference to the accompanying drawings. Showing:

Fig. 1

a perspective, simplified view of a chair according to the invention,

Fig. 2

a side view of the in Fig. 1 simplified illustrated chair,

Fig. 3

a view showing the seat-bearer and the seat of the in Fig. 1 and 2 shown chair from below,

Fig. 4

a step-section through the seat and the seat support according to the section line IV-IV in Fig. 3 with the seat in its low position,

Fig. 5

a cut according to the section Fig. 4 corresponds substantially, with the seat in its up position,

Fig. 6

a perspective view of two adjusting slide and an actuating rod of the in the Fig. 1 and Fig. 2 shown chair,

Fig. 7

in the Fig. 6 illustrated arrangement in a rotated position,

Fig. 8

an exploded view showing the arrangement of Fig. 6 7 between the seat support and the seat of the chair according to the invention,

Fig. 9

one of the Fig. 8 corresponding view from another side, and

Fig. 10

a section through the seat arrangement of the chair according to the invention along the actuating rod.

In the following, the terms "front", "rear" or the like are used again and again for the description. These expressions refer to those in the Fig. 1 and 2 illustrated, intended arrangement of the chair. The same applies to the terms used "horizontal", "vertical" or the like.

The Fig. 1 and 2 show an office chair in its entirety. The chair comprises a chair frame 1 with a foot frame 2, which is supported over a plurality of running rollers 3 against a floor, not shown, such as a foot floor. On the foot frame 2, a height-adjustable, extending in a vertical direction chair column 4 is attached to the upper end of a seat support 5 is attached. The seat support 5 is essentially equipped in two parts; it has a front seat support part 6 and a rear seat support part 7. The front seat support part 6 is fixed to the chair pillar 4. The rear seat support member 7 is hinged to the front seat support member 6 above the chair pillar 4 by means of a pivot joint (not shown) with a horizontal pivot axis (not shown). On the front seat support part 6, a seat height adjustment device (not shown) is provided, which serves for height adjustment of the chair column 4.

The seat support 5 carries a seat 8, which has a free, upper seat surface 9 for seating on the seat 8. On the rear seat support part 7, a high back-back support 10 is further attached to which a backrest 11 is attached for leaning. Further, on the seat support 5, two opposing side armrests 12 are mounted.

The chair further includes a seat tilt adjustment device for tilt adjustment of the seat 8, which will be discussed in more detail below.

The seat carrier 5 has a front seat carrier portion 13 and a rear seat carrier portion 14 provided opposite to the front seat carrier portion 13.

On the seat support 5, two adjusting carriages 15 are displaceably guided in the rear seat support area 14. The adjusting slide 15 are each between a first outer position in which the seat 8 in a in Fig. 4 shown in a low position, and a second inner position, in which the seat 8 in a in Fig. 5 shown high position, adjustable along a transverse sliding path. In this case, the adjusting carriages 15 are movable along opposite directions of movement on the sliding path. The adjusting slide 15 are formed generally identical.

Each adjusting slide 15 has an adjusting slide thread 16, which is formed as an internal thread and is provided on a guide channel 17 delimiting wall of the adjusting slide 15. The guide channel 17 passes through the respective adjusting slide 15. The guide channel 17 extends in each case along the direction of movement of the respective adjusting slide 15 on an underside 18 of the adjusting slide 15. The underside 18 is in the direction of the Seat support 5 directed. The guide channel 17 is semicircular in the preferred embodiment when viewed in section and open towards the seat support 5.

A front side 19 of the adjustment slide 15, which faces the seat 8, forms an adjustment ramp 20, which runs obliquely with respect to the movement direction of the adjustment slides 15. The adjustment ramps 20 of the adjusting slide 15 run from the top laterally outside down laterally inside.

Each adjustment slide 15 also has an adjustment fuse 21. The adjustment fuses 21 are connected to the associated adjustment ramp 20 via a respective central web 22. The web 22 has compared to the adjustment fuse 21 and the adjustment ramp 20 a significantly reduced width. The length of the web 22 substantially corresponds to the length of the adjusting fuse 21st

Each adjustment fuse 21 has a front side 23, an adjustment ramp 20 facing inner securing side 24 which is connected to the web 22, and two opposite side edges 25 and two opposing transverse edges 26th The adjustment fuses 21 have side recesses 28 on the side. The adjustment fuse 21 is arranged on the web 22 such that the front side 23 and the securing side 24 extend substantially parallel to the associated adjustment ramp 20. Between the securing side 24 of the adjustment fuse 21 and the adjustment ramp 20 22 adjustment recesses 27 are formed on both sides of the web. The adjusting recesses 27 preferably extend over the entire length of the adjusting fuse 21 obliquely to the direction of movement of the adjusting slide 15. They are open to the side outside and the end. The projecting laterally outwardly from the web 22 of the adjusting fuse 21 each forms an adjustment-securing body, which is bounded by the adjacent adjusting recess 27.

The underside 18 of the adjusting slide 15 each has a relation to a base body 29 of the adjusting slide 15 increased width, whereby on the adjusting slide 15 lateral guide webs 30 are formed, which along the movement direction of the adjustment Slides 15 extend. The guide webs 30 lie in one plane and serve to interact with guide strips 31 on the seat support 5. As in particular Fig. 8 can be seen extending the guide strips 31 in the direction of movement of the adjusting slide 15 horizontally in the rear seat support portion 14 adjacent to a rear edge 32 of the seat support 5. The guide webs 30 of the adjustment Slides 15 engage under the guide strips 31, whereby the adjusting slide 15 are slidably mounted on the seat support 5.

The transfer bevels 46, 47 also form securing areas or securing webs, which laterally engage in the adjusting recesses 27.

The seat tilt adjustment device further comprises an actuating rod 33 which serves for the synchronous operation of the two adjusting slide 15 and is rotatably mounted on the seat support 5. The operating rod 33 extends in a transverse direction of the chair parallel to the rear edge 32 of the seat support 5.

The actuating rod 33 has a horizontally extending longitudinal center axis 34 about which it is rotatable. The actuating rod 33 is mounted in the rear seat support portion 14. A corresponding bearing recess 35 which is open at the top is designed for this purpose in the rear seat carrier area 14.

The actuating rod 33 has an actuating rod thread 36 which is adapted to the adjusting slide thread 16. The actuator rod thread 36 includes a first actuator rod sub-thread 37 disposed in a first end portion 38 of the actuator rod 33 and a second actuator rod sub-thread 39 disposed in a second end portion 40 of the actuating rod 33 is arranged. The two actuating rod partial threads 37, 39 extend in the preferred embodiment spaced along the longitudinal center axis 34th

The actuating rod partial thread 37, 39 are formed running in opposite directions to each other, preferably one of the actuating rod partial thread 37 and 39 is left-handed and the other formed right-handed.

Each of the actuating rod partial thread 37, 39 is associated with an adjusting slide 15. The adjusting carriages 15 are guided with their adjusting slide threads 16 on the actuating rod 33 in such a way that the respective adjusting ramps 20 or the adjusting securing device 21 are facing one another or facing each other. The distance between the two adjusting slide 15 along the longitudinal center axis 34 deviates in the low position of the seat according to Fig. 4 from the distance between the two adjusting slide 15 in the high position of the seat 8 according to Fig. 5 from. In the low position, the distance is much greater than in the high position.

Further, the operating rod 33 in the second end portion 40 has a transmission gear 41 formed as a toothed wheel and having corresponding external transmission teeth 42. Adjacent to the transmission gear 41 is a manually operable actuating wheel 43 provided, which is rotatably mounted on the seat support 5 and in the center has an externally toothed transmission wheel 44 with transmission teeth 45. The transmission wheel 44 and the toothed wheel 41 mesh with each other. Preferably, the transmission wheel 44 of the actuating wheel 43 is larger than the associated gear wheel 41 of the actuating rod 33. By providing such a transmission a particularly good torque or torque transmission is made possible.

Preferably, furthermore, the actuating wheel 43 is larger in diameter than the actuating rod 33 is formed. The actuating wheel 43 is provided with outside handle protrusions or handle recesses, so that it is particularly good manually operated.

The seat reclining device further includes a plurality of ramp-like transfer ramps 46, 47 provided at the bottom of the seat 8. The transfer bevels 46, 47 are associated with the adjusting slide 15 and extend obliquely with respect to the direction of movement of the adjusting slide 15. They thus run obliquely with respect to a horizontal. The transfer slopes 46, 47 preferably enclose with the horizontal an angle between 20 ° and 70 °, more preferably between 30 ° and 60 °.

Preferably, the transfer slopes 46, 47 extend downwardly in a rear seating area 48 from a first seat side edge 49 of the seat 8 and a second opposite seat side edge 50, and approach each other. The first transfer slope 46 associated with the first actuator rod sub-thread 37 extends obliquely downwardly from the first seat side edge 49. The second transfer slope 47 extends obliquely from the second seat side edge 50 below. The second portion 40 of the actuating rod 40 is disposed adjacent to the seat outer edge 50 while the first portion 38 of the actuating rod 33 is disposed adjacent to the seat outer edge 49.

The transfer bevels 46, 47 each have an outer side 51 directed in the direction of the adjustment slide 15 and preferably also an inner side 52 pointing in the direction of the seat surface 9. The transfer bevels 46, 47 each have an elongated guide in their middle region 53. Recess 54 for the adjusting slide 15. The width of the guide recesses 54 corresponds substantially to the width of the webs 22 of the adjusting slide 15th

The adjustment ramps 20 and the adjustment fuses 21 of the adjusting slide 15 are matched to the transfer slopes 46, 47. In particular, the pitch of one of the adjustment ramps 20, of the associated adjustment securing device 21 and of the transfer ramp 46 or 47 associated therewith, is essentially the same.

In a front seat 55, the seat 8 is supported relative to the seat support 5. The seat 8 is pivotally mounted there about a pivot axis 56.

Hereinafter, the function and the seat reclining device will be explained in more detail. It is from Fig. 4 assumed that the seat 8 is in the low position. The adjusting slide 15 are in their first position, adjacent to the seat side edges 49, 50 and have a maximum distance along the actuating rod 33 to each other. The adjustment ramps 20 are in contact with the transfer ramps 46, 47. The adjustment ramps 20 of Adjusting carriage 15 are slidably on the outer sides 51 of the transfer slopes 46, 47 at. The web 22 of the adjusting slide 15 passes through the guide recesses 54, whereby the securing side 24 of the adjusting fuse 21 adjacent to the inside 52 of the transfer slopes 46, 47 is arranged. By this arrangement, the adjusting slide 46, 47 are slidably guided on the seat 8 and the seat 8 is also secured against lifting upwards.

Rotation of the actuating wheel 43 in a first rotational direction causes rotation of the actuating rod 33 about its longitudinal center axis 34, due to the gear-like coupling between the actuating wheel 43 and the actuating rod 33 via their intermeshing Transmission teeth 42 and 45 is due. The actuating wheel 43 is in meshing engagement with the actuating rod 33.

As a result of this rotation of the actuating rod 33, the actuating rod partial threads 37, 39 are also rotated about the longitudinal center axis 34. The actuating rod partial threads 37, 39 together with the adjusting slide threads 16 each have a threaded spindle coupling. The rotation of the actuating rod 33 about its longitudinal center axis 34 thus causes a horizontal displacement of the adjusting slide 15 along the actuating rod 33. In this case, the adjusting slide 15 are in common or synchronously from its first position to its second Moved position in a first direction of movement, wherein the distance of the adjusting slide 15 during the displacement path of the adjusting slide 15 is reduced to each other.

Since the adjusting slide 15 with their adjustment ramps 20 with the transfer slopes 46, 47 in sliding connection, is characterized by the Merging the adjusting slide 15 parallel to the longitudinal center axis 34 of the seat 8 in the region of the transfer slope 46, 47 pushed upward. In this case, there is a relative movement between the adjustment ramps 20 and the associated transmission bevels 46 and 47. In the region of the pivot axis 56, no elevation of the seat 8. The seat 8 pivots only about the pivot axis 56th

In the Fig. 5 are the adjusting slide 15 in their second position with a distance from each other. The adjustment ramps 20 rest against lower end regions 57 of the transfer bevels 46, 47. The transfer ramps 46 and 47, respectively, have been slidably moved along the pitch ramps 20. The seat 8 is now inclined to the horizontal maximum.

By rotation of the actuating wheel 43 in a second, opposite rotational direction, the adjusting carriages 15 are moved back by the actuating rod 33 along a second direction of movement, which is opposite to the first direction of movement. The seat 8 pivots back again. The above description applies here analogously.

Claims (13)

1. Chair, in particular office chair, comprising

   a) a foot baseframe (2);

   b) a seat support (5) connected to the foot baseframe (2);

   c) a seat (8) mounted to the seat support (5), wherein the inclination thereof is adjustable; and

   d) a seat inclination adjustment device for adjustment of the inclination of the seat (8), comprising

   e) an actuable actuation bar (33) which

   f) is rotatably mounted to the seat support (5); and

   g) has at least one actuation bar thread (36) in at least some areas, characterized in that

   h) two adjustment carriages (15) are provided which are displaceable by the actuation bar (33), wherein each of the adjustment carriages (15)

   i) has at least one adjustment ramp (20) which engages with the seat (8) for pivoting the seat (8); and

   j) at least one adjustment carriage thread (16) interacting with the at least one actuation bar thread (36) for displacement thereof,
   wherein

   k) the actuation bar thread (36) has a first actuation bar partial thread (37) which is arranged in a first area (38) of the actuation bar (33), and a second actuation bar partial thread (39) which is arranged in a second area (40) of the actuation bar (33), and

   l) wherein each of the actuation bar partial threads (37, 39) is assigned to one of the adjustment carriages (15).
2. Chair according to claim 1, characterized in that the adjustment carriage thread (16) is configured as an internal thread and is formed in a guide channel (17) provided at the adjustment carriage (15), wherein the actuation bar (33) passes through the guide channel (17).
3. Chair according to claim 1 or 2, characterized in that the adjustment carriage (15) is displaceable along the actuation bar (33) between a first position in which the seat (8) is in a low position, and a second position in which the seat (8) is in a high position.
4. Chair according to claim 1, characterized in that the first actuation bar partial thread (37) and the second actuation bar partial thread (39) are configured inversely to each other.
5. Chair according to claim 1, characterized in that a distance between the two adjustment carriages (15) in the low position of the seat (8) deviates from a distance between the two adjustment carriages (15) in the high position of the seat (8).
6. Chair according to one of the preceding claims, characterized in that the adjustment carriage (15) has an anti-adjustment protection (21) which secures the seat (8) to the seat support (5), is assigned to the adjustment ramp (20) and preferably runs obliquely relative to a direction of movement of the adjustment carriage (15).
7. Chair according to one of the preceding claims, characterized in that the seat inclination adjustment device has at least one transmission chamfer (46, 47) provided at the seat (8), which transmission chamfer (46, 47) runs obliquely relative to a direction of movement of the adjustment carriage (15) and is in a sliding connection with the adjustment carriage (15).
8. Chair according to claim 7, characterized in that the transmission chamfer (46, 47) is provided with at least one guide means (54) for the adjustment carriage (15).
9. Chair according to claim 7 or 8, characterized in that the transmission chamfer (46, 47) is provided in a first, preferably rear seat area (48) of the seat (8), wherein the seat (8) is pivotably mounted to the seat support (5) in a second, preferably front seat area (55) which is spaced from the first seat area (48).
10. Chair according to claim 6 and one of claims 7 to 9, characterized in that the anti-adjustment protection (21) has at least one anti-adjustment protection body arranged next to the adjustment ramp (20), which anti-adjustment protection body is also arranged next to the transmission chamfer (46, 47), wherein the transmission chamfer (46, 47) preferably engages from below with the at least one anti-adjustment protection body at least in some areas thereof.
11. Chair according to one of the preceding claims, characterized in that the seat inclination adjustment device is mounted between the seat (8) and the seat support (5).
12. Chair according to one of the preceding claims, characterized in that the seat inclination adjustment device is actuable separately from a seat height adjustment device and/or a backrest adjustment device.
13. Seat arrangement, in particular for an office chair, comprising

    a) a seat (8) which is mounted to a seat support (5), wherein the inclination thereof is adjustable; and

    b) a seat inclination adjustment device for adjustment of the inclination of the seat (8), comprising

    c) an actuable actuation bar (33) which

    d) is rotatably mounted to the seat support (5); and

    e) has at least one actuation bar thread (36) in at least some areas, characterized in that

    f) two adjustment carriages (15) are provided which are displaceable by the actuation bar (33), wherein each of the adjustment carriages (15)

    g) has at least one adjustment ramp (20) which engages with the seat (8) for pivoting the seat (8); and

    h) at least one adjustment carriage thread (16) interacting with the at least one actuation bar thread (36) for displacement thereof,
    wherein

    i) the actuation bar thread (36) has a first actuation bar partial thread (37) which is arranged in a first area (38) of the actuation bar (33), and a second actuation bar partial thread (39) which is arranged in a second area (40) of the actuation bar (33), and

    j) wherein each of the actuation bar partial threads (37, 39) is assigned to one of the adjustment carriages (15).

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