EP1850699B1 - Piece of furniture in particular a seat - Google Patents

Abstract

Piece of furniture includes a first part, and a second part that may be adjusted relative to the first part of the piece of furniture in an adjustment movement. There is a drive device, the drive device being configured for adjusting the second part relative to the first part. At least two drive units are allocated to the second part. In a first kinematic phase of the adjustment movement, the adjustment is carried out by use of a first drive unit, and in a second kinematic phase of the adjustment movement the adjustment is carried out by of a second drive unit, the second part moving relative to the first part in the first kinematic phase and carrying out a substantially equivalent adjustment movement in the second kinematic phase.

Description

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.

By EP 1 097 864 A1 a vehicle seat is known in which a calf support part by means of a linear drive and a gas spring is pivotable.

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 to execute by means of only one drive unit , You are rather the Ge thanks to the second part to assign 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. 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 operatively connected to the second part of the furniture to be adjusted, particularly compact and thus space-saving may be formed, because in contrast to known furniture in which 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 according to 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 adjustment movement performed by the second part relative to the first part can follow any suitable 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 together 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 in the first kinematic phase is pivotable about a first pivot angle and in the second kinematic phase about a second pivot angle. In this embodiment, the second part 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 by a second pivot angle.

Advantageous developments of the aforementioned embodiment 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 is associated with a first pivot axis and the second kinematic phase spaced from the first pivot axis second pivot axis, such that the second part during the first kinematic phase about the first pivot axis and during the second kinematic phase is pivotable about the second pivot axis. In this embodiment, the first drive unit and the second drive unit may be spatially separated from one another, which increases the design freedom with regard 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 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 development of the aforementioned embodiment provides that the actuating element druckbeanspuchbar, in particular rod or plate-shaped or lever is formed, and the one end of the actuating element is pivotally connected and eccentric to the first pivot axis with the articulation lever and the other end of the actuating element hinged is connected to the output member of the associated drive unit. 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 connected to one end of at least one Anreifelementes whose 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 engaging element is designed as a tab and / or that the or each engaging 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 engaging element, so that the second part is pivotally mounted on the first part via the engaging element and the first pivot axis.

A development of the embodiment with the non-rotatably connected to the pivot shaft engaging element provides that the second drive unit is connected to the second part, and that an actuating element is provided, which is in operative connection with the output member of the second drive unit. In this embodiment, the second drive unit is arranged on the second part, wherein the second part is in drive connection via the second actuating element with the output member of the second drive unit.

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 engaging 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 embodiments of a piece of furniture according to the invention. All the features described or illustrated in the drawing form alone or in any desired Combination of the subject matter of the invention, regardless of their combination in the claims or their dependency and regardless of their formulation or representation in the description or in the drawing.

Fig. 1

eine Perspektivansicht eines Aus- führungsbeispieles eines erfindungsgemä- ßen Möbels in Form eines Sessels,

Fig. 2

in perspektivischer Phantomdarstellung Teile einer Verstellmechanik zur Ver- stellung eines Wadenteiles des Möbels gemäß Fig. 1,

Fig. 3

eine Seitenansicht von Teilen der Ver- stellmechanik gemäß Fig. 2,

Fig. 4

eine perspektivische Darstellung von Teilen der Verstellmechanik gemäß Fig. 2,

Fig. 5

in teilweise geschnittener Seitenansicht den Sessel gemäß Fig. 1 zu Beginn einer ersten kinematischen Phase der Verstell- bewegung,

Fig. 6

in gleicher Darstellung wie Fig. 5 den Sessel gemäß Fig. 5 während der ersten kinematischen Phase der Verstellbewegung in einer Verstellposition,

Fig. 7

in gleicher Darstellung wie Fig. 5 den Sessel gemäß Fig. 5 während der ersten kinematischen Phase der Verstellbewegung in einer weiteren Verstellposition,

Fig. 8

in gleicher Darstellung wie Fig. 5 den Sessel gemäß Fig. 5 am Ende der ersten kinematischen Phase und zu Beginn der zweiten kinematischen Phase der Ver- stellbewegung,

Fig. 9

in gleicher Darstellung wie Fig. 5 den Sessel gemäß Fig. 5 während der zweiten kinematischen Phase der Verstellbewegung und

Fig. 10

in gleicher Darstellung wie Fig. 5 den Sessel gemäß Fig. 5 am Ende der zweiten kinematischen Phase der Verstellbewe- gung.

It shows:

Fig. 1

1 is a perspective view of an embodiment of a piece of furniture in the form of an armchair according to the invention;

Fig. 2

in perspective phantom representation parts of an adjustment mechanism for adjusting a calf part of the furniture according to Fig. 1 .

Fig. 3

a side view of parts of the adjustment mechanism according to Fig. 2 .

Fig. 4

a perspective view of parts of the adjustment according to Fig. 2 .

Fig. 5

in partially sectioned side view of the chair according Fig. 1 at the beginning of a first kinematic phase of the adjustment movement,

Fig. 6

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

Fig. 7

in the same representation as Fig. 5 according to the chair Fig. 5 during the first kinematic phase of the adjustment movement in a further adjustment position,

Fig. 8

in the same representation as Fig. 5 according to the chair Fig. 5 at the end of the first kinematic phase and at the beginning of the second kinematic phase of the adjustment movement,

Fig. 9

in the same representation as Fig. 5 according to the chair Fig. 5 during the second kinematic phase of the adjustment movement and

Fig. 10

in the same representation as Fig. 5 according to the chair Fig. 5 at the end of the second kinematic phase of the adjustment movement.

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 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 one end adjustably connected to a second part, which is formed in this embodiment by a calf part 12, which supports a resting on the chair 2 person in Calf or lower leg area is used. 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, two drive units 18, 20 are associated with the calf portion 12 in this embodiment, the adjustment being effected by means of the first drive unit 18 and in the second kinematic phase of the adjustment movement by means of the second drive unit 20 in a first kinematic phase of the adjustment movement, namely a pivoting movement. wherein the calf part 12 in the first kinematic phase and the second kinematic phase performs a substantially similar adjusting 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 connected, the other end is pivotally connected and eccentrically connected to the first pivot axis 22 formed by the pivot shaft 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 in the axial direction of the pivot shaft 22 to the rod 34 and the lever 36, a further link lever 36 'and a further rod 34'. How out Fig. 2 it can be seen, 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, the output shaft 40 is formed as a worm and is in engagement with a rotatably mounted Schnekkenrad 42 which is non-rotatably connected to a rotatably mounted on the calf part 12 threaded spindle 44 is connected. The electric motor 38 is fixed 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 portion 12 is pivotally supported relative to a second pivot axis 50 thereof. The second pivot axis 50 is connected via two in the axial direction of the second pivot axis 50 spaced engagement elements in the form of substantially arcuate tabs 52, 54 with the first pivot axis 22 forming the pivot shaft. For this purpose, one end of the tab 52 is rotatably connected to the first pivot axis 22 forming the pivot shaft, while its other end rotatably connected to the second pivot axis 50 is. 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 on 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 described.

In one in the FIGS. 5 to 8 shown first kinematical phase, the calf part 12 is pivoted by means of the first drive unit 18 about the first pivot axis 22 relative to the seat part 10, while the calf part 12 pivots in the second kinematic phase by means of the second drive unit 20 about the second pivot axis 50 relative to the seat part 10 becomes. Like from the FIGS. 5 to 10 As can be seen, in this embodiment, the first pivot axis 22 and the second pivot axis 50 are substantially parallel to each other.

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 support 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 in Fig. 5 moved to the left. Here, the spindle nut 32 presses on the lever 34 against the lever 36, so that this in Fig. 5 about the first pivot axis 22 in the counterclockwise direction pivoted.

How out Fig. 6 As can be seen, in this case the calf part 12 pivots relative to the seat part 10 about the first pivot axis 22. 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.

How out Fig. 7 can be seen, pivoted in a further movement of the spindle nut 32 in Fig. 7 To the left, the calf part 12 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, the calf part 12 is formed compressible in this embodiment in its longitudinal direction, wherein a compression or Entstauchung takes place by means of an electric motor drive unit, which, however, not interested in detail here and therefore not explained in detail.

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

Fig. 8 at the same time 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 such that the spindle nut 48 in Fig. 8 moved down. 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 pivoted relative to the seat part 10 further counterclockwise, and now about the second pivot axis 50, as is apparent from Fig. 9 is apparent.

Starting from the in Fig. 9 illustrated adjustment position drives the electric motor 38, the threaded spindle 44 further such that the spindle nut 48 in Fig. 9 screwed to the right, so that the calf part 12 is pivoted further counterclockwise until it in Fig. 10 has shown reached the second end position of the adjusting movement. 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.

Like from the FIGS. 5 to 10 As can be seen, in this embodiment, the calf part 12 is pivoted during the first kinematic phase by a first pivot angle of about 90 ° and during the second kinematic phase by a second pivot angle of about 90 ° relative to the seat part 10 so that a resulting third pivot angle about 180 °. In this embodiment, the first kinematic phase and the second kinematic phase follow each other in time. However, it is also possible according to the invention 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 (19)

1. Piece of furniture, in particular a chair,
   with a second part that may be adjusted relative to a first part and
   with electric motor drive means for adjusting the second part relative to the first part,
   characterised in that
   at least two electric motor drive units (18, 20) are assigned to the second part,
   in that in a first kinematic phase of the adjustment movement the adjustment is carried out by means of a first drive unit (18) and in a second kinematic phase of the adjustment movement the adjustment is carried out by means of a second drive unit (20), whereby the second part (12) performs a pivot movement relative to the first part (10) in the first kinematic phase and the second kinematic phase,
   in that the second part (12) in the first kinematic phase can be pivoted about a first pivot angle and in the second kinematic phase can be pivoted about a second pivot angle relative to the first part (10) and
   in that a third pivot angle resulting from the first pivot angle and the second pivot angle is approximately 180°.
2. Piece of furniture according to claim 1, characterised in that the first pivot angle and/or the second pivot angle is about 90°.
3. Piece of furniture according to claim 1 or 2, characterised in that a first pivot axis (22) is assigned to the first kinematic phase and a second pivot axis (50) spaced apart from the first pivot axis is assigned to the second kinematic phase, such that the second part (12) can be pivoted during the first kinematic phase about the first pivot axis (22) and during the second kinematic phase about the second pivot axis (50).
4. Piece of furniture according to claim 3, characterised in that the first pivot axis (22) and the second pivot axis (50) are substantially parallel to one other.
5. Piece of furniture according to claim 3 or 4, characterised in that the first pivot axis (22) is formed by a pivot shaft mounted pivotably on a base body (4) of the piece of furniture.
6. Piece of furniture according to claim 5, characterised in that at least one articulated lever (36) is connected in a non-rotatable manner to the pivot shaft, which articulated lever is in active connection with the driven member of the assigned drive unit (18) via an operating element.
7. Piece of furniture according to claim 6, characterised in that the operating element is designed to withstand pressure and in particular is rod or plate-like or in the form of a lever, and in that one end of the operating element is connected by articulation and is connected relative to the first pivot axis (22) in an eccentric manner to the articulation lever (36), and the other end of the operating element is connected in an articulated manner to the driven member of the associated drive unit (18).
8. Piece of furniture according to one of claims 5 to 7, characterised in that one end of at least one gripping element is connected in a non-rotatable manner to the pivot shaft, and the other end is connected to the second part.
9. Piece of furniture according to claim 8, characterised in that the gripping element or each gripping element is in the form of a bracket (52, 54).
10. Piece of furniture according to claim 8 or 9, characterised in that the gripping element or each gripping element is designed to be bow-shaped.
11. Piece of furniture according to claims 8 to 10, characterised in that a shaft is connected in a non-rotatable manner to the gripping element or each gripping element, which shaft forms the second pivot axis (50), about which the second part (12) is pivotably mounted.
12. Piece of furniture according to one of the preceding claims, characterised in that the second drive unit is connected to the second part, and in that an operating element is provided which is operatively connected to the driven member of the second drive unit (20).
13. Piece of furniture according to claim 12, characterised in that the operating element is designed to be in the form of a rod or a plate or a lever.
14. Piece of furniture according to claim 12 or 13, characterised in that the operating element is connected in an articulated manner to the driven member and/or the gripping element, and is connected in an eccentric manner to the second pivot axis.
15. Piece of furniture according to one of the preceding claims, characterised in that the first kinematic phase and the second kinematic phase occur consecutively.
16. Piece of furniture according to one of the preceding claims 1 to 14, characterised in that the first kinematic phase and the second kinematic phase run simultaneously or overlap at least partially.
17. Piece of furniture according to one of the preceding claims, characterised in that at least one of the drive units (18, 20) includes a linear drive.
18. Piece of furniture according to one of the preceding claims, characterised in that at least one of the drive units (18, 20) includes a spindle drive.
19. Piece of furniture according to claim 18, characterised in that the driven member of the spindle drive is a spindle nut (32 or 48), which is arranged secured against rotation and movable in axial direction on a drive-rotatable threaded spindle (30 or 44).

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