EP3443191A1

EP3443191A1 - Furniture drive system

Info

Publication number: EP3443191A1
Application number: EP17707747.6A
Authority: EP
Inventors: Wolfgang Bohle
Original assignee: Julius Blum GmbH
Current assignee: Julius Blum GmbH
Priority date: 2016-04-15
Filing date: 2017-02-14
Publication date: 2019-02-20
Anticipated expiration: 2037-02-14
Also published as: HUE048119T2; US10590692B2; CN109072650A; EP3443191B1; JP2019513922A; AU2017249991B2; US20190010747A1; AT518430B1; WO2017177247A1; JP6714727B2; AU2017249991A1; AT518430A4; CN109072650B; ES2785627T3

Abstract

The invention relates to a furniture drive system (4) for a furniture part (3) that is movably mounted on a furniture body (2), comprising: a mechanical control unit (5) having: at least one pivotably mounted control arm (6) for moving the movable furniture part (3), a spring device (18) for applying force to the control arm (6), a movably mounted control part (10) having a transmission opening (10a) for transmitting a force from the spring device (18) to the control arm (6); an electrical drive unit (7) having: an electric motor (12) for the electric-motor support of motion of the movable furniture part (3), a driver (22), which can be driven by the electric motor (12), for transmitting a torque of the electric motor (12) to the mechanical control unit (5), wherein the driver (22) of the electrical drive unit (7) can be inserted into the transmission opening (10a) of the control part (10), wherein the electrical drive unit (7) and the mechanical control unit (5) are designed as separate assemblies and can be fastened to each other, wherein a contact surface (25) for the driver (22) is arranged laterally adjacent to the transmission opening (10a) and the driver (22) is preloaded toward the contact surface (25) by a force store (23), wherein the driver (22), in a position in which the driver (22) is aligned with the transmission opening (10a), automatically penetrates the transmission opening (10a) by means of the force of the force store (23).

Description

Furniture drive system

The present invention relates to a furniture drive system for a furniture part movably mounted on a furniture body, comprising:

- a mechanical actuator with:

at least one pivotally mounted actuating arm for moving the movable furniture part,

a spring device for applying force to the actuating arm,

- A movably mounted actuator with a transfer port to

Transmission of a force from the spring device to the actuator arm,

- An electric drive unit with:

an electric motor for electromotive assistance of a movement of the movable furniture part,

a driver which can be driven by the electric motor for transmitting a torque of the electric motor to the mechanical actuating unit, wherein the driver of the electric drive unit can be introduced into the transmission opening of the actuating part,

wherein the electric drive unit and the mechanical actuator are designed as mutually separate units and fastened to each other.

Furthermore, the invention relates to a method for mounting an electric drive unit to a mechanical actuator. Furthermore, the invention relates to a piece of furniture with a furniture part movably mounted on a furniture part and with a furniture drive system of the kind to be described.

Such furniture drive systems are already known according to WO 2008/134786 A1 and WO 2010/129979 A1. The mechanical actuating unit has an actuating arm acted upon by a spring device for moving a furniture flap, with an electric drive unit optionally being connectable to the housing of the mechanical actuating unit for additional movement support of the actuating arm. The mechanical actuator and the electric drive unit are as executed separate units, so that the electric drive unit can be provided as needed as an additional and easy to be replaced drive module. The electric drive unit has a power transmission device with a driving pin, which transmits the force provided by the electric motor available to the mechanical actuator unit and thus supports the actuating arm in the opening and / or closing movement. The driving pin of the electric drive unit engages in mounting position in a corresponding transmission opening of the mechanical actuator. For proper interaction between the mechanical actuating unit and the electric drive unit, therefore, the driving pin and the transmission opening must be exactly prepositioned to one another, wherein after prepositioning, an assembly of the electric drive unit is possible. However, this correct pre-positioning can certainly be associated with difficulties, because the housing of the electric drive unit during assembly conceals both the driving pin and the transmission opening and thus the visibility of the fitter is limited. In addition, incorrect assembly may result because the drive pin can be accidentally moved past the transfer port and ultimately not engaged with the transfer port. By such a false assembly of course, the functionality of the furniture drive system is not guaranteed.

Object of the present invention is therefore to propose a furniture drive system of the type mentioned, with a reliable power transmission between the electric drive unit and the mechanical actuator is possible.

This is achieved according to the invention by the features of patent claim 1. Further embodiments of the invention are indicated in the dependent claims.

According to the invention, it is thus provided that a contact surface for the driver is arranged laterally next to the transmission opening and that the driver is biased in the direction of the contact surface by a force accumulator, wherein the driver in a position in which the driver with the transmission opening is aligned, penetrates automatically by the force of the energy storage in the transfer opening.

In a first assembly step, therefore, the mechanical actuating unit is mounted on a furniture body, in a further assembly step, the electric drive unit is attached to the mechanical adjusting unit. In a further step, the actuating arm and / or the electric motor is moved, as a result of which the driver prestressed by the energy accumulator is displaceably guided along the abutment surface until a longitudinal axis of the driver is aligned with a longitudinal axis of the transfer opening. If the driver and the transfer opening are finally aligned with one another, then the carrier is pressed into the transfer opening by the force of the discharging force accumulator, wherein the movement coupling between the electric drive and the mechanical actuating unit is produced.

The method according to the invention for mounting an electric drive unit on a mechanical setting unit for moving a movably mounted furniture part is characterized by the following steps:

- Assembly of the mechanical actuating unit on a furniture body,

Attaching the electric drive unit to the mechanical actuator,

- Moving the pivotally mounted actuating arm of the mechanical actuator and / or moving the electric motor of the electric drive unit, wherein the driver is biased by a force storage in the direction of a contact surface of the mechanical actuator and by the movement of the actuator arm and / or by the movement of the electric motor along the

Bearing surface is feasible,

- Wherein the actuator arm and / or the electric motor is moved or are until the driver of the electric drive unit automatically penetrates into the transfer opening of the mechanical actuator by the force of the energy storage device.

Further details and advantages of the present invention will become apparent from the embodiment shown in the figures. It shows or show: Fig. 1 a, 1 b is a perspective view of a piece of furniture with a movable

Furniture part which is movably supported by a furniture drive system relative to a furniture body, and a view of the furniture drive system mounted on the furniture body,

2 shows the furniture drive system in a perspective view,

3a, 3b, the furniture drive system in a perspective view, wherein of the electric drive unit, only the transmission element and acted upon by a force accumulator driver are shown, and an enlarged detail view of this,

Fig. 4a, 4b, 4c is a perspective view of the furniture drive system with

Detail views of the driver in a non-latched and in a locked position,

Fig. 5a, 5b, 5c, 5d is a perspective view of the furniture drive system with the actuator arm in a closed position, as well as enlarged

Detail views of the engaging in the transfer opening driver,

6a-6c, a first embodiment for releasably securing the electric drive unit to the mechanical actuator, Fig. 7a-7c, a second embodiment for releasably securing the electric drive unit to the mechanical actuator.

Fig. 1a shows a furniture 1 with a furniture body 2, wherein a movable furniture part 3 is movably mounted in the form of a furniture flap by a furniture drive system 4 relative to the furniture body 2. The furniture drive system 4 comprises a mechanical actuating unit 5 with a housing 5a and a relative to the housing 5a pivotable actuating arm 6 for moving the furniture part 3. Further, the furniture drive system 4 comprises an electric drive unit 7 with a housing 7a, wherein the electric drive unit 7 for electromotive assistance of movable furniture part 3 is provided. The mechanical actuator 5 and the electric drive unit 7 are formed as separate units, wherein the housing 5a of the mechanical actuator 5 and the housing 7a of the electric drive unit 7, preferably by a locking device and / or screw, are fastened to each other. The two housings 5a, 7a point to each other Appendix each flat trained walls, so that a relatively compact design of the furniture drive system 4 is made possible.

Fig. 1 b shows the furniture 1 with hidden furniture part 3. In a first assembly step, the mechanical actuator 5 is mounted on the furniture body 2. The mechanical actuating unit 5 comprises a pivotably mounted actuating arm 6, which can be acted upon by a spring device 18 (FIG. 3). The mechanical actuating unit 5 further comprises a movably mounted actuating part 10, by means of which a force of the spring device 18 can be transmitted to the actuating arm 6. Moreover, two levers 1 1 a and 1 1 b are provided for moving the actuating arm 6. The housing 7a of the electric drive unit 7 can be fastened to the housing 5a of the mechanical actuating unit 5, a movement of the actuator arm 6 being assisted by an electric motor 12 (FIG. 2) of the electric drive unit 7. Fig. 2 shows the furniture drive system 4 in a perspective view, wherein the housing 5a of the mechanical actuator 5 and the housing 7a of the electric drive 7 are fastened together. The mechanical actuator 5 includes a pivotally mounted actuator 10 and the two levers 1 1 a and 1 1 b for moving the actuator arm 6. The electric drive unit 7, however, includes a schematically indicated electric motor 12 and a control or regulating device 13 for controlling or regulating the Electric drive unit 7. By the electric motor 12, a movably mounted transmission element 14 of the electric drive unit 7 can be driven, which in the embodiment shown as a rotatably mounted about a rotation axis gear 15 with a toothing 16, preferably formed with a non-circular toothing. As a result of the toothing 16 designed as non-circular toothing, a particularly high torque is available in the two end positions of the movable furniture part 3 (that is to say when the electric motor 12 starts slowly). A support element 17 arranged on the transmission element 14 for supporting an energy accumulator 23 (FIG. 3), which is provided for pretensioning a driver 22 for transmitting power to the mechanical actuating unit 5, can be seen.

Fig. 3a shows the furniture drive system 4 in a perspective view, wherein of the electric drive unit 7, only the rotatably mounted transmission element 14 and acted upon by the power storage 23 driver 22 are shown. The mechanical actuating unit 5 comprises at least one actuating arm 6 to be fastened to the movable furniture part 3, which can be acted upon by a spring device 18, preferably by at least one compression spring. The force of the spring device 18 is transferable via a transmission mechanism to the actuating arm 6, wherein the transmission mechanism in the figure shown a pivotable about a rotation axis 20 two-armed lever 19, a thrust element 21, the actuating member 10 and the two levers 1 1 a, 1 1 b includes. The transmission element 14 of the electric drive unit 7 is pivotally mounted about an axis of rotation 15 and has a toothing 16 which cooperates with a (not shown) multi-stage reduction gear of the electric drive unit 7, so that the high speed of the electric motor 12 is reduced and high torque on the Transmission element 14 is transferable. The transmission element 14 is arranged at the last stage of the multi-stage reduction gear and is freely movably supported by a (not shown) one-way clutch in both directions within predetermined limits. The driver 22 of the electric drive unit 7, which for torque transmission to the actuator 10 of the mechanical actuator

5 is provided, is arranged on the transmission element 14 and mounted in a direction parallel to the axis of rotation 15 extending direction on the transmission element 14 slidably. By a, preferably designed as a compression spring, energy storage 23, which cooperates on the one hand with the support element 17 of the transmission element 14 and on the other hand with the driver 22, the driver 22 is biased in a direction perpendicular to a contact surface 25 direction. The contact surface 25 is formed in the embodiment shown by the adjusting member 10 and is located laterally adjacent to a transmission opening 10a of the actuating member 10, wherein the driver 22 for producing the torque transmission in the transmission opening 10a of the actuating member 10 can be introduced. After installation of the electric drive unit 7 to the mechanical actuator 5 is the actuator arm

6 moves manually and / or the electric motor 12 started, causing the driver 22 in the clockwise direction as long moves in the direction of the arrow until the driver 22 and the transmission opening 10a of the actuating member 10 are aligned with each other and the driver 22 by the force of the relaxing force accumulator 23 automatically snaps into the transfer opening 10a of the actuating part 10. Thus, the driver 22 in this pivotal movement in the direction of the arrow not on the Material strength of the actuating member 10 abuts the actuator 10 is provided with a ramp 24 through which the driver 22, starting from a relative to the contact surface 25 low position against the force of the force accumulator 23 in the direction of the contact surface 25 can be raised. FIG. 3b shows an enlarged view of the area circled in FIG. 3a.

4a shows a perspective view of the furniture drive system 4, wherein the driver 22 has been moved closer by a movement of the actuating arm 6 and / or by a movement of the electric motor 12 in the direction of the transmission opening 10a of the mechanical actuating unit 5 back. 4b shows an enlarged detail view of the carrier 22 movably mounted on the transmission element 14, which rests against the contact surface 25 by the force of the force accumulator 23. The driver 22 can be raised by the ramp 24 to the height of the contact surface 25, wherein the energy accumulator 23 is in a tensioned state. The actuating arm 6 and / or the electric motor 12 is moved until the driver 22 and the transmission opening 10a are in an aligned position relative to each other, until finally the driver 22 - as shown in Figure 4c - by the force of the relaxing force accumulator 23rd snaps into the transmission opening 10a without play, so that the torque transmission between the electric drive unit 7 and the mechanical actuating unit 5 can be produced. The driver 22 is, as shown in Figure 4c, between two projections of the transmission element 14 via a guide 26, in which guide pin 27 engage, linearly displaceable, so that the driver 22 is mounted in a direction perpendicular to the contact surface 25 extending limited movement. Via a further ramp 24a of the actuating part 10, the driver 22 can be raised in the direction of the contact surface 25 even in the case of an opposite direction of rotation of the transmission element 14. On the arrangement of the ramps 24, 24a can be dispensed with, provided that the driver 22 can be supported over the entire path of movement at a coplanar to the contact surface 25 level.

Fig. 5a shows the furniture drive system 4 in a perspective view, wherein the actuator arm 6 is in a closed position (factory setting). After installation of the electric drive unit 7 to the mechanical actuator 5, the actuator arm 6 by manual operation and / or by starting the Electric motor 12 is slightly moved in the direction of the open position, so that the biased by the energy storage 23 in the direction of contact surface 25 driver 22, starting from the position shown in Figure 5b auffährt on the further ramp 5c and thereby the energy storage 23 is loaded (Fig. 5c). When the driver 22 and the transfer opening 10a of the setting member 10 are aligned with each other, the driver 22 by the force of the relaxing force accumulator 23 is automatically in the transfer opening 10a of the actuating member 10 positively latched (Fig. 5d).

In the figures shown, the adjusting member 10 with the transfer opening 10a, in which the driver 22 can be introduced, designed as a separate from the actuator arm 6 component. But it is quite possible that the adjusting member 10 is formed integrally with the actuating arm 6, so that the transmission opening 10a is formed in or on the actuating arm 6 itself. Moreover, it is possible to arrange the transfer opening 10a also at another movable control part of the mechanical actuator unit 5 along the power train between the spring device 18 and the actuator arm 6. The driver 22 may be formed as a shaft journal with a non-circular cross section, which causes a positive connection by a rotationally fixed connection with a corresponding thereto transmission opening 10 a of the actuating member 10. The cross-sectional area of the driver 22 can therefore be designed at least in sections as an oval, as a square or polygonal, as a multi-tooth profile or as a star profile (for example as a Torx profile).

6a-6c show a possible embodiment for the releasable attachment of the electric drive unit 7 to the mechanical control unit 5. For reasons of clarity, the protruding from the housing 5a of the mechanical actuator 5 components (ie, the actuator 10, the lever 1 1 a, 1 1 b and the actuator arm 6) not shown. In a first assembly step, the mechanical actuator 5 is pre-assembled on the furniture body 2. The mechanical actuating unit 5 comprises at least one bearing point 28a, 28b, in which the electric drive unit 7 can be suspended via at least one fastening element 29a, 29b (FIG. 6b), whereupon the hinged electric drive unit 7 moves about an axis which extends horizontally in the assembled state, for example Direction to the mechanical actuator unit 5 is pivoted out and lock after successful pivoting by a locking device 30 with the mechanical actuator 5 (Fig. 6c). The locking device 30 For example, it can have at least one locking lever 30a (FIGS. 7a-7c) which is movably mounted and spring-biased by a spring and which, in the attached state of the electric drive unit 7, interacts with a corresponding recess or latching edge of the mechanical actuating unit 5. In the illustrated embodiment, the locking lever 30a of the locking device 30 is pivotally mounted on the electric drive unit 7 about an axis horizontally extending in the assembled state and cooperates in the locked position with a horizontally extending edge of the housing 5a of the mechanical actuator 5. Starting from the assembled state according to FIG. 6c, the driver 22 (FIG. 6a) can then move automatically into the transmission opening 10a of the mechanical (not shown here) by a movement of the actuating arm 6 and / or by a movement of the electric motor 12 by the force of the force accumulator 23 Actuator 5 penetrate, whereby the torque transmission between the electric drive unit 7 and the at least one actuator arm 6 of the mechanical actuator 5 is made.

Fig. 7a-7c show a further embodiment for releasably securing the electric drive unit 7 to the mechanical actuator unit 5, of which only one to the furniture body 2 to be fastened mounting plate of the housing 5a is visible. The electric drive unit 7 has fastening elements 29a, 29b, which can be suspended on the housing 5a (FIG. 7a). The electric drive unit 7 suspended in this way can then be pivoted about an axis, preferably horizontally or vertically, in the direction of the mechanical setting unit 5 (FIG. 7b). The locking device 30 comprises at least one movably mounted locking lever 30a and at least one locking element 31a, 31b, which is movable, for example linearly displaceable, by an actuation of the locking lever 30a. On the housing 5a of the mechanical actuator 5 recesses 32a, 32b for receiving the locking elements 31 a, 31 b are arranged. By actuating the locking lever 30a, the two locking elements 31a, 31b in the figure shown can be moved upwards and thus locked relative to the recesses 32a, 32b of the mechanical actuating unit 5 (FIG. 7c). According to one embodiment, it may be provided that at least two or more locking elements 31 a, 31 b are connected in a motion-coupled manner to the locking lever 30 a, so that the locking elements 31 a, 31 b move together by a movement of the locking lever 30 a and thus bring about a synchronous locking and / or synchronous unlocking of the locking elements 31 a, 31 b relative to the corresponding recesses 32 a, 32 b of the mechanical actuating unit 5. In the exemplary embodiment shown, the locking lever 30a is arranged on the electric drive unit 7 and the recesses 32a, 32b on the mechanical setting unit 5. Of course, conversely, it is also possible that the locking lever 30a are arranged on the mechanical setting unit 5 and the recesses 32a, 32b on the electric drive unit 7. In the locking position, the locking lever 30a can be flush with an outer surface of the electric drive unit 7 or the mechanical actuating unit 5 or, if appropriate, can be recessed therein. In this way, on the one hand a compact design can be realized, on the other hand, incorrect operations of the locking lever 30a and thus an undesirable loosening between the mechanical actuator 5 and the electric drive unit 7 can be prevented.

Claims

claims

Furniture drive system (4) for a furniture part (3) movably mounted on a furniture body (2), comprising:

- A mechanical actuator (5) with:

- At least one pivotally mounted actuating arm (6) for moving the movable furniture part (3),

- A spring device (18) for applying force to the actuating arm (6),

a movably mounted actuating part with a transmission opening for transmitting a force from the spring device to the actuating arm,

- An electric drive unit (7) with:

an electric motor (12) for electromotive assistance of a movement of the movable furniture part (3),

- A by the electric motor (12) drivable driver (22) for transmitting a torque of the electric motor (12) to the mechanical actuator (5), wherein the driver (22) of the electric drive unit (7) in the transmission opening (10 a) of the actuating part (10) can be introduced,

wherein the electric drive unit (7) and the mechanical actuating unit (5) are designed as mutually separate structural units and can be fastened to one another,

characterized in that laterally next to the transfer opening (10a) a contact surface (25) for the driver (22) is arranged and that the driver (22) in the direction of the contact surface (25) is biased by a force accumulator (23), wherein the driver (22) in a position in which the driver (22) is aligned with the transfer opening (10a), by the force of the force accumulator (23) automatically penetrates into the transfer opening (10a).

Furniture drive system according to claim 1, characterized in that the position in which the driver (22) with the transfer opening (10a) is aligned, by a movement of the actuating arm (6) and / or by a movement of the electric motor (12) is adjustable.

Furniture drive system according to claim 1 or 2, characterized in that the contact surface (25) from the actuating part (10) is formed.

Furniture drive system according to one of claims 1 to 3, characterized in that the actuating part (10) has at least one ramp (24, 24a) through which the driver (22), starting from a relative to the contact surface (25) low position against the force of Force accumulator (23) in the direction of the contact surface (25) can be raised.

Furniture drive system according to one of claims 1 to 4, characterized in that the driver (22) on a movably mounted and by the electric motor (12) drivable transmission element (14) of the electric drive unit (7) is arranged.

Furniture drive system according to claim 5, characterized in that the movably mounted transmission element (14) is rotatably mounted about an axis of rotation (15).

Furniture drive system according to claim 5 or 6, characterized in that the movably mounted transmission element (14) at least partially has a toothing (16), preferably a non-circular toothing.

Furniture drive system according to one of claims 5 to 7, characterized in that the driver (22) via at least one guide (26) relative to the transmission element (14) is guided linearly displaceable.

Furniture drive system according to one of claims 1 to 8, characterized in that the force accumulator (23) has at least one compression spring.

10. Furniture drive system according to one of claims 5 to 9, characterized in that the transmission element (14) has a supporting element (17) wherein the energy accumulator (23) on the one hand cooperates with the support element (17) and on the other hand with the driver (22).

1 1. Furniture drive system according to one of claims 1 to 10, characterized in that the mechanical actuating unit (5) at least one bearing point

(28a, 28b), in which the electric drive unit (7) can be suspended, that in the at least one bearing point (28a, 28b) hinged electric drive unit (7) about a, preferably in the assembled state horizontally extending axis to the mechanical actuator ( 8) is pivoted out and that a locking device (30) is provided, through which the mechanical

Actuating unit (5) with the electric drive unit (7) is releasably lockable.

Furniture drive system according to claim 1 1, characterized in that the locking device (30) has at least one movably mounted locking lever (30a) and at least one by the locking lever (30a) movable locking element (31 a), which by an actuation of the locking lever (30 a) relative to a on the mechanical actuator (5) or on the electric drive unit (7) arranged recess (32a) is lockable.

Furniture drive system according to claim 12, characterized in that the locking device (30) has at least two or more locking elements (31 a, 31 b), which are connected in a coupled movement with the locking lever (30 a), so that the locking elements (31 a, 31 b) an actuation of the locking lever (30a) is movable together and relative to corresponding recesses (32a, 32b) synchronously locked and / or synchronously unlocked.

Furniture (1) with a furniture body (2) and with a furniture part (3) movably mounted on the furniture body (2) and with a furniture drive system (4) according to one of claims 1 to 13 for driving the movable furniture part (3).

15. A method for mounting an electric drive unit (7) on a mechanical actuating unit (5) for moving a movably mounted Furniture part (3), wherein the mechanical actuating unit (5) has a pivotally mounted actuating arm (6), wherein a movement of the actuating arm (6) by one of an electric motor (12) drivable driver (22) of the electric drive unit (7) supported by electric motor is, wherein the driver (22) of the electric drive unit (7) in a transfer opening (10 a) of the mechanical actuator (5) can be introduced, characterized by the following steps:

- Mounting the mechanical actuating unit (5) on a furniture body (2),

Fixing the electric drive unit (7) to the mechanical setting unit (5),

- Moving the pivotally mounted actuating arm (6) of the mechanical actuating unit (5) and / or moving the electric motor (12) of the electric drive unit (7), wherein the driver (22) by an energy store (23) in the direction of a contact surface (25) the mechanical actuating unit (5) is biased and by the movement of the actuating arm (6) and / or by the movement of the electric motor (12) along the contact surface (25) is feasible,

- Wherein the actuator arm (6) and / or the electric motor (12) is moved until the driver (22) of the electric drive unit (7) in the transmission opening (10 a) of the mechanical actuator (5) by the force of Force accumulator (23) penetrates automatically.