NZ616978B2 - Piece of seating furniture - Google Patents

Abstract

tilt mechanism for a seat is disclosed. The seat has a seat plate (1) with a lower seat framework (2) arranged on the underside of said seat plate (1). Also provided is a tilting device (4), by means of which the person sitting on the piece of furniture can execute a tilting movement about a point of rotation located in the seat region. The tilting device (4) is formed by a structural unit which is separate from the seat plate (1) and is arranged in a well or depression at the centre of the seat plate (1) of the piece of furniture. The tilting device is arranged such that its surface is flush or level with the surrounding rim of the chair. of rotation located in the seat region. The tilting device (4) is formed by a structural unit which is separate from the seat plate (1) and is arranged in a well or depression at the centre of the seat plate (1) of the piece of furniture. The tilting device is arranged such that its surface is flush or level with the surrounding rim of the chair.

Description

Piece of Seating Furniture The invention ns a piece of seating ure, more particularly, a tiltable piece of seating furniture.

Pieces of seating furniture according to the invention are to be understood in the most common sense. They may be in the form of chairs for domestic use, office chairs, office armchairs, stools etc., but also vehicles seats, airplane seats, cinema seats etc.

Pieces of seating furniture that enable a tilting movement of the seat plate about a pivot point located at the central seating area are known in various embodiments. The basic principle resides always in that on the bottom side of the seat plate a support employing an elastic body is arranged. This elastic body counteracts the tilting movement with an appropriate restoring force.

A disadvantage of these known tilting devices in connection with pieces of seating ure is that the seat top structure resting on the seat substructure always tilts in its ty; a person sitting thereon experiences this as a rather wobbly sensation.

Based on this, it is an object of the present ion to provide a piece of seating furniture of the aforementioned kind with an improved tilting or or at least to provide the public with a useful ative.

A piece of seating ure according to one aspect of the invention is set forth in claim 1.

In this way, a piece of seating furniture is provided which is characterized by an improved tilting behavior. The basic idea of the piece of seating furniture according to an embodiment of the invention resides in that the top structure which is resting on the seat substructure, i.e., primarily the seat plate that forms the seat bottom structure or at least part thereof, optionally also armrests as well as the backrest, do not tilt in their entirety but instead only the actual seating area of the seat plate performs a tilting movement. The tilting movement occurs precisely where the person is seated on the seat plate, i.e., on the tilting device.

In this context, the tilting device is no longer arranged, as in the past, below the seat plate but d above the seat plate, in accordance with the invention.

However, this does not preclude that, in addition to the tilting device according to the invention, a - conventional - tilting device is provided between the seat plate and the seat substructure. The seat plate can also be connected absolutely rigidly with the seat substructure. In this context, the seat plate is to be understood in the most general sense such that it is a plate-shaped structure, no matter which circumferential contour it has. Also, ings of the e as well as of the bottom side of this seat plate are discretionary. The tilting device is a separate unit which can be arranged on the top side of the seat plate. This has also the advantage that one and the same seat plate can be furnished with different g devices, as needed. As a whole, the person that is g on the piece of seating furniture with the novel tilting device no longer experiences the wobbly sensation as the tilting movement occurs; instead, the tilting compensation nts occur only within the pelvis and hip area of the person. The tilting device can be designed such that any desired tilting movement is possible. For example, it is possible that only a g nt to the front and to the rear is possible, that only a lateral tilting movement is possible, that only a tilting movement to the front and to the rear as well as a lateral tilting movement are possible, that a tilting movement in any direction is possible, etc. Also, it is conceivable that tilting nts in several directions are le but that in this context certain directions are preferred by means of a special configuration of the tilting , for example, by an angle-dependent restoring force. The seat plate having a depression within which the g device is arranged means that the tilting device is embedded in this depression of the seat plate. In this context, the topside of the tilting device forms with the topside of the rim area of the seat plate a substantially flush surface. This circumferential rim of the seat plate also s a high ity to the latter.

According to the ment of claim 2, the tilting device can have at the topside a tilting seat disk on which the person is sitting, the tilting device with its tilting seat disk being arranged recessed in such a way within this depression of the seat plate that in the rest position, the topside of the tilting seat disk forms a substantially flush surface with the topside of the rim area of the seat plate and that, starting from this rest position, the tilting device with its tilting seat disk is tiltable within the depression. This tilting seat disk is substantially rigid but can be provided with any profiling with regard to the topside, the bottom side as well as the circumferential contour; it functions during the tilting movement like a seesaw. Basically, it is however also possible that the tilting device has no such tilting seat disk. This is ularly the case when the tilting device is embodied like a n filled with flexible contents, as will be disclosed in more detail infra.

When using such a cushion, the cushion may have in principle also a g seat disk.

According to the embodiment of claim 3, the circumferential rim of the tilting seat disk can have a spacing relative to the topside of the seat plate that is arranged underneath. This means that relative to this intermediate spacing a corresponding g movement, i.e., slant of the tilting seat disk relative to the seat plate, can be performed.

Alternatively, the embodiment of claim 4 proposes that in the rim area between the tilting seat disk and the seat plate one or several spring elements are arranged therebetween. This means that the tilting seat disk is supported in a springy n in the rim area.

Preferably, according to the embodiment of claim 5, the tilting device has at the bottom side a support t. This support element defines a tilting point or a tilting area from where the person seated on the seat can carry out tilting movements laterally, forwardly, rearwardly, or within all angle ranges. The support t can be centrally arranged at the center of the tilting device or - generally - at the central area of the tilting device. Also, an arrangement of the support t that is displaced relative to the e center is conceivable. At the same time, it is also vable that several support elements are provided.

The support elements can be embodied moreover substantially in a punctiform shape or in the form of a tilting bar. When using a tilting bar, a tilting movement would be le only in a certain direction while, for a punctiform support t, a tilting movement in all circumferential directions would be possible.

This also encompasses that certain tilting movements are preferred as a result of the adjustment of the restoring force.

According to the embodiment of claim 6, the support element can be designed as a rigid body. It only must serve to allow a person seated on the tilting device to perform a tilting movement. For example, the rigid support element can be designed as a pherical structure. But also other profilings, for example, in the form of an ellipsoid, are conceivable in order to enable a preferential movement, for example, forward and rearward, for a tilting nt while also permitting a lateral tilting movement is permitted however.

The embodiment according to claim 7 proposes however that the supporting element is an elastic t. This means that during the tilting movement a tensioning force is created which attempts to return the tilting seat disk into the initial horizontal position. This means that the person must overcome a counterforce during the tilting movement of the person. As already discussed above, this elastic spring t can be sally designed with regard to its arrangement as well as configuration. For example, an exact central arrangement of the c spring element is possible, but also an off-center arrangement.

According to a further embodiment of claim 8, the actual seat plate can have a flat topside on which the tilting device is resting, the depression being formed such that teh seat plate is provided with a circumferentially extending ring. In this way, a very flat complete uration of the seating area of the piece of seating furniture is provided. In this case, the tilting support, in particular when it is designed as an elastic tilting support, is preferably realized within the central area. But also an off-center tilting support is conceivable. The flat e is to be understood in the most general sense. It can be planar but also surface-profiled.

According to the embodiment of claim 9, the tilting device is arranged ively within the depression. This means that the tilting device with its circumferential r reaches only to the inner contour of the depression without radially ting past the depression. This means that the tilting device is embedded completely in the depression.

Alternatively, according to the embodiment of claim 10, the circumferential rim of the depression of the seat plate is elastic wherein the circumferential area of the tilting seat disk is resting on this elastic circumferential rim. In this way, a very compact and effective spring t of the tilting seat disk in the circumferential area is provided. Nonetheless, it is also conceivable that the tilting seat disk in the central area is also additionally provided with an elastic support.

A preferred embodiment proposes according to claim 11 that the tilting device is formed by a cushion of sorts. This cushion is filled with a flowable , for example with air, with water, with a viscous gel etc. This cushion can be provided at its topside with a plate-shaped substantially rigid tilting seat disk which thus is floatingly supported on the cushion in the manner of a seesaw. However, it is also conceivable that no such tilting seat disk is present so that the person is directly seated on the n. It is also conceivable that the cushion has an additional support body. This support action can be provided within the l area of the n but also off-center in order to affect the tilting properties of the tilting device. Also, several t bodies can be provided. Also, the shape of the support body is discretionary, for example, in the form of a semi-sphere, a tilting bar etc. Preferably, this support is a rigid body. It can however also be elastic. The cushion, of course, can also be used without t body. When using such a cushion as a tilting device, upon a tilting movement of the person seated thereon, the le material contained in the cushion is forced from one area into another area. At the location where the flowable material flows to, the cushion will bulge and ore create, as a whole, a slanted position for generating the tilted position. Accordingly, the cushion of the tilting device can be arranged in the afore bed depression within the seat plate. This es the cushion with l hold and a lateral boundary. Of course, the cushion of the tilting device can also be located on the flat topside of the seat plate (i.e., without depression).

As an alternative to the cushion, according to a further preferred embodiment according to claim 13, as a tilting device an annular hose can be provided also which is filled with a flowable medium, in particular air, water, or a gel. This annular hose can either be circular or can also be designed to have an oval shape. Also, the cross-sectional contour of the hose body can be discretionary.

For example, this cross-sectional contour can either be round or oval or formed differently. ably, this annular hose has at the topside a tilting seat disk on which the person is seated. This tilting seat disk can have, but must not have, a support element at the bottom side. The support element is located in the central g of the ring and penetrates h it. This l opening of the annular hose can extend up to the support element so that in this way a certain centering action is provided. Particularly the use of an annular hose as a tilting device has the advantage that additionally the aforementioned support element can also be positioned without a problem below the tilting seat disk. According to the shape and profiling of the ring and optionally of the support element, tilting characteristics can be adjusted in a ed fashion.

Moreover, the embodiment ing to claim 15 proposes that the seat plate together with the tilting device has a common cover. This means that with regard to the outer appearance it is not apparent that an additional tilting device is arranged on the actual seat plate.

Finally, the embodiment according to claim 16 proposes that the seat plate and the seat ucture are either rigidly connected to each other or by means of a tilting mechanism, a synchronizing mechanism, or - generally - a movement mechanism concerning the seat surface, the backrest as well as the armrests etc. as they are known from the prior art. In the variant in which the seat plate is rigidly connected to the seat substructure, the tilting device, as the one and only means, provides the tilting movement. It is however also alternatively possible that in addition to this g device - in a tional way - the seat plate is arranged tiltably on the seat substructure or that a synchronizing mechanism is provided which synchronizes the g movement of the seat surface with the tilting movement of the backrest. The ation with other known movement s is also conceivable. As a whole, this means superimposed tilting movements of the person seated on the piece of seating ure. The elastic restoring forces n the two tilting s can be different in this context.

Unless the context clearly requires otherwise, throughout the description and claims the terms “comprise”, “comprising” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense. That is, in the sense of “including, but not limited to”.

Embodiments of a piece of seating furniture according to the invention will be explained in the following with the aid of the drawings. It is shown therein in: Fig. 1a a schematic exploded view of the piece of seating furniture from below; Fig. 1b a schematic exploded view of the piece of seating furniture from above; Figs. 2a to 2f section illustrations of the piece of seating furniture in various embodiments; Figs. 3a to 3c section illustrations of the piece of seating furniture in further different embodiments utilizing a cushion as a tilting device; Fig. 4a and 4b section illustrations of the piece of seating furniture in further different embodiments utilizing an annular hose as a tilting device.

The piece of seating furniture, as illustrated in Figs. 1a and 1b in exploded views purely tically, has a seat plate 1 which is arranged on a seat substructure 2.

The seat plate 1, as can be seen in particular in Fig. 1b, is shaped to have a depression. In this depression 3 of the seat plate 1, there is a tilting device 4 with a support element 5 and a tilting seat disk 6 arranged thereon. y, a cover 7 is provided.

Fig. 2a to 2f show in section illustrations s embodiments of the piece of seating furniture.

Fig. 2a shows essentially the embodiment variant as it has already been illustrated in the exploded rations of Figs. 1a and 1b. The seat plate 1 has accordingly a depression 3.The tilting device 4 is disposed in this depression 3.

The support element 5 in this ment is formed by two plates that are parallel to each other between which an elastic body, in the illustrated embodiment a cylinder of c rubber or plastic material, is fixedly arranged.

On the upper plate of this tilting device 4, the g seat disk 6 is arranged. The entire thing is d by the cover 7. The person seated on the seat plate 1, in particular on the g seat disk 6, can move against the spring force of the support element 5 in any direction to perform tilting movements. The actual seat plate 1 remains unchanged with regard to its position in this ion. As a result of the spring force of the supporting element, the person must overcome a counter force.

The ment of Fig. 2b differs from that of the embodiment in Fig. 2a by the support element 5. In this embodiment in Fig. 2b, this support element 5 is embodied as a seesaw of sorts.

The ment of Fig. 2c s from the embodiment in Figs. 2a and 2b in that the rim area of the seat plate 1 for forming the afore bed depression 3 is formed by an annular spring device 8. The latter can be an elastic material. On this spring device 8 the circumferential rim of the tilting seat disk 6 is resting. The central support element 5 is embodied as an elastic body and is connected fixedly with the bottom side of the tilting seat disk 6. In other respects, the tilting device 4 (as in the afore described embodiments and as in the following embodiments) can be simply placed as a separate component onto the seat plate 1. In the embodiment in Fig. 2c, the annular spring device 8 generates a counter force when a tilting movement occurs.

In the embodiment in Fig. 2d, the tilting seat disk 6 only extends to the rim of the depression 3 (as already in the embodiments of Figs. 2a and 2b). As a t element 5 an elastic body is provided here, as in the embodiment in Fig. 2c.

The embodiment of Fig. 2e differs from the embodiment in Fig. 2d. The difference resides only in that the support element 5 is formed by a coil spring.

The embodiment in Fig. 2f differs finally from the aforementioned embodiments in that no depression 3 is provided here. The actual seat plate 1 is of a flat configuration. On it the tilting device 4 is supported. The tilting seat disk 6 extends here to the rim of the actual seat plate 1. The support element 5 is in the form of the device as has already been illustrated and described in Fig. 2a.

Figs. 3a to 3c show further embodiments of the tilting device 4 for a piece of seating furniture. The principle here is that the seat plate 1 has a depression 3.

This depression 3 is formed in that the seat plate 3 is provided with a circumferentially extending ring 9. The latter can be either monolithic with the seat plate 1 or can also be attached as a separate ent to the seat plate 1.

It is important in this context that as a tilting device 4 a flat cushion 10 is ed which is positioned within the depression 3. This cushion 10 is filled with a flowable medium, for example, air, water, or a gel. Above the cushion 10 there is also a cover 7.

The function is as follows: In Fig. 3a in solid lines the initial ion is illustrated initially. When a person seated on the piece of seating furniture moves laterally, this forces the flowable medium in the n 10 from the corresponding side to the other side of the cushion 10 which is therefore correspondingly bulging. This is indicated by the dashed lines. When the person then performs a movement in the opposite ion, the medium flows back within the cushion 10.

Fig. 3b shows the piece of seating furniture as in Fig. 3a but with the difference that additionally on the cushion 10 a tilting seat disk 6 is arranged.

The embodiment of Fig. 3c finally shows that the cushion 10 in the central area has a support element 5. However, the latter can also be arranged nter.

Also, several support ts 5 can be provided. ent profilings are conceivable, including the configuration of the support element 5 in form of a bar.

By providing a special configuration of the support element 5 or the supporting elements 5, it is possible to provide different tilting characteristics.

Figs. 4a and 4b show further embodiments of the tilting device 4 for a piece of seating ure.

Here, the ple is also that the seat plate 1 has a depression 3. In this embodiment, as a tilting device 4 an annular hose 11 is provided which is disposed in the depression 3. As in the case of the cushion 10, this annular hose 11 is filled with a flowable medium, for example, air, water, or a gel. Initially, according to Fig. 4a, on this r hose 11 a tilting seat disk 6 is positioned which is resting with its rim on the annular hose 11.

In addition, this tilting seat disk 6 according to Fig. 4b can also have a t element 5. The latter is arranged in the central recess of the annular hose 11 and can be profiled discretionarily.

List of Reference Characters 1 seat plate 2 seat ucture 3 depression 4 tilting device support element 6 tilting seat disk 7 cover 8 annular spring device 9 ring cushion 11 annular hose

Claims (17)

Claims 1.

1. Piece of seating furniture comprising: a seat plate, 5 a seat ucture arranged at the bottom side of the seat plate, and a g device by means of which a person seated on the piece of g furniture can m a tilting movement about a pivot point arranged within a seating area provided by the piece of seating furniture, wherein the tilting device is formed by a unit that is separate relative to the 10 seat plate, which unit is arranged between the seat plate of the piece of seating furniture and a user, in use, when the user is seated in a normal seating position above the unit, wherein the seat plate has a depression within which the tilting device is arranged, and 15 wherein the tilting device is arranged in the depression such that the e of the tilting device forms a substantially flush surface with the topside of a rim area of the seat plate.

2. Piece of seating furniture according to the preceding claim, wherein the 20 tilting device is provided at the topside with a tilting seat disk on which the person is seated, wherein the tilting device with its g seat disk is arranged recessed in such a way within the depression of the seat plate that, in the rest position, the topside of the tilting seat disk forms a substantially flush surface with the topside of the rim area of the seat plate 25 and that, starting from this rest position, the tilting device with its g seat disk is tiltable within the depression.

3. Piece of seating furniture according to claim 2, wherein the circumferential rim of the tilting seat disk is located at a spacing above the seat plate.

4. Piece of seating furniture according to claim 2, wherein, in the rim area between the tilting seat disk and the seat plate, an annular spring device is provided.

5. Piece of seating furniture according to any one of claims 1 to 4, n 5 the tilting device is provided at the bottom side with a support element.

6. Piece of seating ure according to claim 5, wherein the support element is embodied as a rigid body. 10

7. Piece of seating furniture according to claim 5, wherein the support element is formed as an elastic spring element for ing a counterforce during the tilting movement.

8. Piece of seating furniture according to any one of claims 1 to 7, wherein 15 the seat plate has a flat topside on which the tilting device rests, wherein the depression is formed by means of the seat plate being provided with a circumferentially extending ring.

9. Piece of seating furniture according to claim 1, wherein the tilting device is 20 ed exclusively within the depression.

10. Piece of g furniture according to claim 1, wherein the circumferential rim of the depression of the seat plate is embodied to be springy and the circumferential rim of the tilting seat disk rests on this springy 25 circumferential rim of the seat plate.

11. Piece of seating ure according to any one of claims 1 to 10, wherein the tilting device is formed by a n which is filled with a flowable medium.

12. Piece of furniture according to claim 11, wherein the flowable medium is air or water or a gel.

13. Piece of seating furniture according to any one of claims 1 to 10, wherein the tilting device is formed by an annular hose which is filled with a 5 flowable medium.

14. Piece of seating furniture according to claim 13, wherein the flowable medium is air or water or a gel. 10

15. Piece of seating furniture according to any one of claims 1 to 14, wherein the seat plate and the tilting device have a common cover.

16. Piece of seating furniture ing to any one of claims 1 to 15, n the seat plate and the seat substructure are either rigidly connected to 15 each other or by means of a tilting mechanism, a synchronizing mechanism.

17. Piece of seating furniture substantially as herein described with reference to any one of the ments shown in the accompanying drawings. WO 52252 W0 52252