WO2006074763A9

WO2006074763A9 - Piece of furniture in particular a seat

Info

Publication number: WO2006074763A9
Application number: PCT/EP2005/012956
Authority: WO
Inventors: Eckhart Dewert
Original assignee: Deon Ag; Eckhart Dewert
Priority date: 2005-01-14
Filing date: 2005-12-03
Publication date: 2006-10-26
Also published as: WO2006074763A1; DE102005001877A1; ATE424128T1; DE502005006775D1; US20080018157A1; EP1850699B1; EP1850699A1; CN101128139A

Abstract

The invention relates to a piece of furniture, in particular, a seat, comprising a second piece (12) which may be adjusted relative to a first piece (10) of the furniture and drive means for adjusting the second piece (12) relative to the first piece (10). According to the invention, the second piece (12) is provided with at least two drive units (8, 20), whereby, in a first kinematic phase, the adjuster movement for the adjustment occurs by means of a first drive unit (18) and, in a second kinematic phase, the adjuster movement occurs by means of a second drive unit (20). The second piece (12) moves relative to the first piece (10) in the first kinematic phase and in the second kinematic phase an essentially equivalent adjustment movement, for example a pivoting, is carried out.

Description

Furniture, in particular seating

The invention relates to a piece of furniture, in particular seating of the type mentioned in the preamble of claim 1.

Such furniture is known for example in the form of motor-adjustable armchairs, which have mutually adjustable motor parts, for example, a relative to a seat part adjustable calf part for supporting a person resting on the chair in the leg or calf area. For adjusting the parts of the furniture relative to each other drive means are provided, which have a drive unit with an electric motor.

The invention has for its object to provide a piece of furniture referred to in the preamble of claim 1, in which the second part is adjustable relative to the first part over a large adjustment.

This object is achieved by the teaching defined in claim 1. The invention is based on the idea of an adjustment of the second part relative to the first part of the furniture in an adjustment, in which the first part relative to the second part performs a substantially similar adjustment, for example a pivoting movement, by means of only one drive unit perform. Rather, it is up to the Thanks to underlying the second part at least two drive units, wherein in a first kinematic phase of the adjustment, the adjustment by means of a first drive unit and in a second kinematic phase of the adjustment by means of a second drive unit, wherein the second part relative to the first part in the first kinematic phase and the second kinematic phase performs a substantially similar adjustment movement, for example, a pivoting movement. The combination of two, for example, each having an electric motor drive units to achieve a substantially similar adjustment allows the teaching of the invention particularly large adjustment ranges. According to the invention, different kinematic phases of a substantially similar adjustment movement, that is, for example, a pivoting movement, or a linear translational movement, by different drive units, causes. Another advantage of the teaching of the invention is that an adjustment mechanism, via which the drive units are in operative connection with the second part of the furniture to be adjusted, particularly compact and thus space-saving can be formed, because in contrast to known furniture, where the adjustment only is executed via a drive unit, for example, an adjustment mechanism with short and simple levers can be used. According to the invention, two or, if required by the respective requirements, more than two drive units can be provided, which are assigned to the second part. Under an assignment of the drive units to the second part is understood according to the invention that the drive units for Serve adjusting the second part. In this case, the drive units assigned to the second part can be arranged on the same. However, it is also possible according to the invention to arrange the drive units assigned to the second part partially or completely to another part of the furniture, for example the first part or a main body.

According to the respective requirements, the adjusting movement performed by the second part relative to the first part can be any suitable one

Follow kinematics. For example, the substantially similar adjustment movement performed by the second part in the first and second kinematic phases may be a linear translational movement or a combination of a linear translational movement with a pivotal movement. An advantageous development of the teaching according to the invention provides that the adjusting movement is a pivoting movement. In this embodiment, the drive units associated with the second part jointly form a pivoting drive with which particularly large pivoting angles of the second part can be achieved.

A development of the aforementioned embodiment provides that the second part is pivotable in the first kinetic phase by a first pivot angle and in the second kinematic phase by a second pivot angle. In this embodiment, the second member is pivoted by the first drive unit in the first kinematic phase about a first pivot angle, while it is pivoted in the second kinematic phase by the second drive unit to ^'a second pivot angle.

Advantageous developments of the abovementioned guide form provide that the first pivot angle and / or the second pivot angle is about 90 ° and / or that a resulting from the first pivot angle and the second pivot angle third pivot angle is about 180 °. In particular, in the latter embodiment, a particularly large pivoting range of the second part results relative to the first part.

In principle, the pivoting of the second part relative to the first part in the first and the second kinematic phase can take place about a common pivot axis. An advantageous development of the teaching of the invention, however, provides that the first kinematic phase, a first pivot axis and the second kinematic phase one to the first

Pivot axis spaced second pivot axis is assigned, such that the second part during the first kinematic phase about the first pivot axis and during the second kinematic phase about the second pivot axis is pivotable. In this embodiment, the first drive unit and the second drive unit can be spatially separated from one another, which increases the design freedom with respect to the arrangement of the drive units relative to the second part.

An advantageous development of the aforementioned embodiment provides that the first pivot axis and the second pivot axis are substantially parallel to each other. In this embodiment, a particularly simple construction of the adjustment mechanism results, via which the respective drive unit is in drive connection with the second part.

To make the structure of the adjustment particularly simple, it is appropriate that the first - C ^ -

Pivot axis is formed by a pivotally mounted on a base body of the furniture pivot shaft.

An advantageous development of the aforementioned embodiment provides that at least one articulation lever is rotatably connected to the pivot shaft, which is in operative connection with the output member of the associated drive unit via an actuating element. In this embodiment, the pivoting of the pivot shaft by means of the articulation lever, which can be actuated for example by means of a linear drive.

A further development of the abovementioned embodiment provides that the actuating element can be pressure-proofed, in particular bar-shaped or plate-shaped or as a lever, and one end of the actuating element is articulated and eccentrically connected to the articulation lever to the first pivot axis and the other end of the Actuating element is pivotally connected to the output member of the associated drive unit is connected. In this embodiment, a particularly simple and robust construction results with few components.

An extraordinarily advantageous development of the embodiment with the pivot shaft provides that with the pivot shaft rotatably one end of at least one

An engaging element is connected, the other end is connected to the second part. In this embodiment, the spatial freedom in the arrangement of the first drive unit relative to the second part are further increased.

Further developments of the aforementioned embodiments provide that the or each engagement element is designed as a tab and / or that the or each attack element is arcuate. Especially at The embodiment with the arcuate attacking element results in a particularly compact design with low overall height and few components.

Another development of the teaching of the invention provides that preferably rotatably connected to the or each engaging element an axis which forms the second pivot axis about which the second part is pivotally mounted. In this embodiment, the second pivot axis is connected to the or each engagement element, so that the second part is pivotally mounted on the first part via the engagement element and the first pivot axis.

A refinement of the embodiment with the engagement element rotationally fixedly connected to the pivot shaft provides that the second drive unit is connected to the second part, and that an actuation element is provided which is in operative connection with the output element of the second drive unit. In this embodiment, the second drive unit is arranged on the second part, wherein the second

Part via the second actuator with the output member of the second drive unit is in drive connection.

In order to enable the transmission of the driving forces of the second drive unit to the second part in a particularly simple manner, provides an advantageous development that the actuator rod-shaped or plate-shaped or is designed as a lever.

In the aforementioned embodiments, the actuating element is expediently hinged to the output member and / or the engagement element and eccentrically connected to the second pivot axis.

Another development of the teaching of the invention provides that the first kinematic phase and the second kinematic phase follow each other in time. In this embodiment, the second part passes through the adjustment range associated with the first kinematic phase and the adjustment range associated with the second kinematic phase in chronological succession.

However, according to the respective requirements, it is also possible for the first kinematic phase and the second kinematic phase to run at least partially overlapping at the same time or in terms of time. In this embodiment, the second part passes through the first kinematic phase and the second kinematic phase at least partially overlapping in time.

In order to make the adjusting mechanism, via which the second part is in operative connection with the drive units, particularly simple, another development of the teaching according to the invention provides that at least one of the drive units has a linear drive.

Another development provides that at least one of the drive units has a spindle drive. Such spindle drives are available as simple and inexpensive standard components and are robust and suitable for applying large forces. A development of the aforementioned embodiment provides that the output member of the spindle drive is a spindle nut, which is arranged against rotation and movable in the axial direction on a rotatably driven threaded spindle. The invention will be explained in more detail with reference to the accompanying drawing, are shown in the exemplary embodiments of a piece of furniture according to the invention. All the features described or illustrated in the drawing are self-explanatory. arbitrary combination, the subject matter of the invention, regardless of their summary in the claims or their dependency and regardless of their formulation or representation in the description or in the drawing.

It shows :

1 is a perspective view of an embodiment of a device according to the invention in the form of a chair,

2 shows a perspective phantom representation of parts of an adjusting mechanism for adjusting a calf part of the piece of furniture according to FIG. 1, FIG. 3 is a side view of parts of the adjustment mechanism of FIG. 2,

Fig. 4 is a perspective view of

2 shows the side view of the chair according to FIG. 1 at the beginning of a first kinematic phase of the adjustment movement, FIG.

5 in the same representation as FIG. 5 the chair according to FIG. 5 during the first kinematic phase of the adjusting movement in an adjustment position, FIG.

5 during the first kinematic phase of the adjusting movement in a further adjustment position, FIG. 8 in the same representation as FIG. 5 the chair according to FIG. 5 at the end of the first kinematic phase and at the beginning of the - S - second kinematic phase of the adjustment movement,

Fig. 9 in the same representation as Fig. 5 the

Armchair according to FIG. 5 during the second kinematic phase of the adjusting movement and

Fig. 10 in the same representation as Fig. 5 the chair according to FIG. 5 at the end of the second kinematic phase of Verstellbewe- supply.

In the figures of the drawing, the same or corresponding components are provided with the same reference numerals. In Fig. 1, an embodiment of a piece of furniture according to the invention in the form of a chair 2 is shown, which has a base body 4, which has two laterally spaced armrests 6, 8. On the armrests 6, 8 a first part in the form of a seat part 10 is arranged, with its one

End adjustable a second part is connected, which is formed in this embodiment by a calf part 12, which serves to support a person resting on the chair 2 person in the calf or lower leg area. With the wad part 12 facing away from the end of the seat part 10 is adjustably connected to a upper body part 14, with the seat part 10 facing away from the end adjustable a head portion 16 is connected. The upper body part 14 serves to support a person resting on the armchair 2 in the upper body region, while the head part serves for supporting a person resting on the armchair 2 in the head region.

The calf part 12 is pivotable relative to the seat part 10, as explained in more detail below will be.

In Fig. 2 parts of an adjustment mechanism are shown, by means of which the calf part 12 is pivotable relative to the seat part 10. According to the invention, the calf part 12 in this embodiment, two drive units 18, 20 assigned, wherein in a first kinematic phase of the adjustment, namely a pivoting movement, the adjustment by means of the first drive unit 18 and in the second kinematic phase of the adjustment by means of the second drive unit 20th takes place, wherein the calf part 12 in the first kinematic phase and the second kinematic phase performs a substantially similar adjustment movement, namely a pivoting movement. For pivoting the calf part 12 relative to the seat part 10 in the first kinematic phase, a first pivot axis 22 is provided, which is formed in this embodiment by a substantially horizontally extending pivotally mounted on the armrests 6, 8 pivot shaft.

The first drive unit 18 has an electric motor 24, the output shaft 26 is formed as a worm of a worm gear and is in engagement with a rotatably mounted worm wheel 28 which is rotatably connected to a threaded spindle 30 which is rotatably mounted on the seat part 10 and on the Worm wheel 28 and the worm 26 is in rotary drive connection with the electric motor 24. The output member of the first drive unit is formed by a spindle nut 32, which is arranged against rotation and movable in the axial direction on the threaded spindle 30.

With the spindle nut 32, one end of an actuating element in the form of a short rod 34 is provided. tied, whose other end is hinged and connected to the first pivot axis 22 formed by the pivot shaft eccentrically with an articulation lever 36 which is rotatably connected to the pivot shaft 22. In order to achieve a symmetrical introduction of force into the pivot shaft 22 with respect to the axial center plane of the threaded spindle 30, the first drive unit 18 has in the axial direction of the pivot shaft 22 to the rod 34 and the lever 36 another articulation lever 36 'and a further rod 34' , As is apparent from Fig. 2, the rods 34, 34 'form a fork-like arrangement, between which the free end of the threaded spindle 30 is received.

The second drive unit 20 has an electric motor 38, whose output shaft 40 is formed as a worm and with a rotatably mounted Schnek- kenrad 42 is engaged, which is rotatably connected to a rotatably mounted on the calf portion 12 threaded spindle 44. The electric motor 38 is fastened to an inner frame 46 of the calf part 12.

The output member of the second drive unit 20 is formed by a spindle nut 48, which is arranged against rotation and movable in the axial direction on the threaded spindle 44. The calf part 12 is relative to a second one

Swivel axis 50 pivotally mounted on the same. The second pivot axis 50 is connected via two in the axial direction of the second pivot axis 50 to each other spaced engagement elements in the form of substantially arcuate tabs 52, 54 with the first pivot axis 22 forming pivot shaft. For this purpose, one end of the lug 52 is non-rotatably connected to the pivot shaft forming the first pivot axis 22, while its other end is non-rotatably connected to the second pivot axis 50. is bound. The connection of the tab 54 with the pivot shaft 22 and the second pivot axis 50 is formed in this corresponding manner.

The second drive unit 20 has a second actuator in the form of a rod 56, one end of which is pivotally connected to the spindle nut 58 and the other end is pivotally connected to the first pivot axis 22 and the second pivot axis 50 eccentrically with the tab 54. Fig. 4 illustrates the connection of the spindle nut 48 with the tab 54 via the rod 56th

The adjustment of the calf part 12 relative to the seat part 10 will be described below with reference to FIGS 5 to 10. In a first kinematic phase illustrated in FIGS. 5 to 8, the calf part 12 is pivoted about the first pivot axis 22 relative to the seat part 10 by means of the first drive unit 18, while the calf part 12 is rotated by the second drive unit 20 in the second kinematic phase Swivel axis 50 is pivoted relative to the seat part 10. As can be seen from FIGS. 5 to 10, in this embodiment the first pivot axis 22 and the second pivot axis 50 are substantially parallel to one another.

FIG. 5 shows a first end position of the adjusting movement, in which the seat part 10 and the calf part 12 span a substantially horizontal supporting plane. Starting from this end position of the adjusting movement of the electric motor 24 drives the threaded spindle 30 so that the spindle nut 32 moves in Fig. 5 to the left. Here, the spindle nut 32 presses on the lever 34 against the articulation lever 36, so that this in Fig. 5 about the first pivot axis 22 counterclockwise swung sense.

As can be seen from FIG. 6, the calf part 12 pivots about the first pivot axis 22 relative to the seat part 10. Since the second drive unit 20 is stopped in the first kinematic phase, the kinematics in this phase are determined exclusively by the first drive unit 18 ,

As can be seen from FIG. 7, in a further movement of the spindle nut 32 in FIG. 7 to the left, the calf part 12 pivots further counterclockwise about the first pivot axis 22. In order to avoid a collision of the free end of the calf part 12 with the bottom 56 , In this embodiment, the calf portion 12 is formed compressible in its longitudinal direction, wherein a compression or Entstauchung carried out by means of an electric motor drive unit, which, however, not interested here in detail and therefore not further explained.

FIG. 8 shows the end of the first kinematic phase at which the calf part 12 is pivoted counterclockwise by approximately 90 ° with respect to the starting position shown in FIG. 5, as can be seen from a comparison of FIGS. 5 and 8.

At the same time, FIG. 8 represents the initial position at the beginning of the second kinematic phase. In this initial position, the electric motor 38 drives the threaded spindle 44 in such a way that the spindle nut 48 in FIG. 8 moves downwards. Due to the articulated connection of the spindle nut 48 with the tab 54 via the lever 56 in this case the calf part 12 is further pivoted counterclockwise relative to the seat part 10, and that now about the second pivot axis 50, as shown in FIG.

Starting from the embodiment shown in FIG. Adjusting position drives the electric motor 38, the threaded spindle 44 further such that the spindle nut 48 screwed in Fig. 9 to the right, so that the calf part 12 is further pivoted counterclockwise until it reaches the second end position of the adjustment shown in Fig. 10 Has. During the second kinematic phase, the first drive unit 18 is stopped, so that the kinematics is determined exclusively by the second drive unit 20. As can be seen from FIGS. 5 to 10, in this exemplary embodiment the calf part 12 becomes about a first pivot angle of about 90 ° during the first kinematic phase and about a second pivot angle of about 90 ° relative to the seat part 10 during the second kinematic phase pivoted, so that a resulting third pivot angle is about 180 °. In this embodiment, the first kinematic phase and the second kinematic phase follow each other in time. However, according to the invention it is also possible for the first kinematic phase and the second kinematic phase to run at least partially overlapping at the same time or in terms of time.

Claims

claims

1. Furniture, in particular seating,

with a relative to a first part of the furniture adjustable second part and

with drive means for adjusting the second part relative to the first part,

characterized,

that the second part at least two drive units (18, 20) are assigned and

in a first kinematic phase of the adjustment movement, the adjustment takes place by means of a first drive unit (18) and in a second kinematic phase of the adjustment movement by means of a second drive unit (20), wherein the second part (12) relative to the first part (10 ) performs in the first kinematic phase and the second kinematic phase, a substantially similar adjustment movement, for example, a pivoting movement.

2. Furniture according to claim 1, characterized in that the adjusting movement is a pivoting movement.

3. Furniture according to claim 2, characterized in that the second part (12) in the first kinematic phase about a first pivoting angle and in the second kinematic matic phase about a second pivot angle relative to the first part (10) is pivotable.

4. Furniture according to claim 3, characterized in that the first pivot angle and / or the second pivot angle is about 90 °.

5. Furniture according to claim 3 or 4, characterized in that a resulting from the first pivot angle and the second pivot angle third pivot angle is about 180 °.

6. Furniture according to one of claims 2 to 5, characterized in that the first kinematic phase is associated with a first pivot axis (22) and the second kinematic phase spaced from the first pivot axis second pivot axis (50), such that the second part (12) is pivotable about the first pivot axis (22) during the first kinematic phase and about the second pivot axis (50) during the second kinematic phase.

7. Furniture according to claim 6, characterized in that the first pivot axis (22) and the second pivot axis (50) are substantially parallel to each other.

8. Furniture according to claim 6 or 7, characterized in that the first pivot axis (22) is formed by a pivotally mounted on a base body (4) of the furniture pivot shaft.

9. Furniture according to claim 8, characterized in that with the pivot shaft rotatably at least one Anlenkhe- bel (36) is connected to the output member of the associated drive unit (18) via an actuating element in WirkungsVerbindung stands.

10. Furniture according to claim 9, characterized in that the actuating element compressive, in particular

Rod-shaped or plate-shaped or as a lever, is formed, and that one end of the actuating element is articulated and to the first pivot axis (22) eccentrically connected to the articulation lever (36) and the other end of the actuating element hingedly connected to the output member of the associated drive unit (18 ) connected is.

11. Furniture according to one of claims 8 to 10, characterized in that with the pivot shaft rotatably connected to one end of at least one Anreifelementes, whose other end is connected to the second part.

12. Furniture according to claim 11, characterized in that the or each engaging element as a tab (52, 54) is formed.

13. Furniture according to claim 11 or 12, characterized in that the or each engaging element is arcuate.

14. Furniture according to claims 11 to 13, characterized in that preferably rotatably connected to the or each engaging element an axis which forms the second pivot axis (50) about which the second part (12) is pivotally mounted.

15. Furniture according to one of the preceding claims, characterized in that the second drive unit is connected to the second part and that an actuator is provided, which is in operative connection with the output member of the second drive unit (20).

16. Furniture according to claim 15, characterized in that the actuating element is rod-shaped or plate-shaped or designed as a lever.

17. Furniture according to claim 15 or 16, characterized in that the actuating element with the driven organ and / or the engaging element is articulated and connected eccentrically to the second pivot axis.

18. Furniture according to one of the preceding claims, characterized in that the first kinematic phase and the second kinematic phase follow one another in time.

19. Furniture according to one of the preceding claims 1 to 17, characterized in that the first kinematic phase and the second kinematic phase occur at the same time or at least partially overlapping.

20. Furniture according to one of the preceding claims, characterized in that at least one of the drive units (18, 20) has a linear drive.

21. Furniture according to one of the preceding claims, characterized in that at least one of the drive units (18, 20) has a spindle drive.

22. Furniture according to claim 21, characterized in that the output member of the spindle drive a spindle nut (32 or 48), which is arranged against rotation and movable in the axial direction on a rotatably driven threaded spindle (30 or 44).