An assembly including a fixed furniture part, a movable furniture part, a guide device, and an electric drive device

Abstract

The assembly comprises a fixed furniture part (1), in particular a furniture cabinet, a furniture part (2) movable relative to the fixed furniture part (1), in particular a drawer, a guide device (3) for guiding the furniture part (2) movable relative to the fixed furniture part (1), in particular a drawer guide for a drawer, the guide device (3) comprising at least one cabinet rail (4) and at least one drawer rail (5) slidable relative to the at least one cabinet rail (4), and at least one electric drive device (6) for at least partially automated movement of the furniture part (2) movable relative to the fixed furniture part (1), in particular comprising an electric motor (7) capable of supplying 230V. an electric drive (6), and at least one retraction device (8) for a movable furniture part (2), and at least one rack (9) operatively connected to the at least one electric drive (6), wherein the at least one retraction device (8) is preferably directly arranged on the at least one drawer rail (5), and the at least one rack (9) is preferably indirectly arranged on the at least one drawer rail (5), and the at least one rack (9) is removably arranged on the at least one support device (10) and / or the at least one support device (10) is removably arranged on the at least one retraction device (8).

Description

[Technical Field]

[0001] The present invention relates to an assembly comprising a fixed furniture part, in particular a furniture cabinet, a furniture part that is movable relative to the fixed furniture part, in particular a drawer, a guide device for guiding the furniture part that is movable relative to the fixed furniture part, in particular a drawer guide for a drawer, the guide device comprising at least one cabinet rail and at least one drawer rail that is slidable relative to the at least one cabinet rail, and at least one electric drive device for at least partially automated movement of the furniture part that is movable relative to the fixed furniture part, in particular at least one electric drive device comprising an electric motor that is capable of supplying 230 V.

[0002] An assembly with a movable furniture part is already known from the publication EP 1 323 364 A1, in which a drawer is moved by means of a drive unit that is driven and controlled via a trigger device. For this purpose, the trigger device has two manually operable contact switches, such as slide switches, arranged on the drawer for three different switching states. The trigger device can be activated depending on the relative position of the furniture part elements or via a tap on the furniture part element to generate a switching pulse.

[0003] An assembly with a movable furniture part is already known from the publication EP 1 323 363 A1, in which a drive unit is controlled by a control device and via a force measuring device to automatically and bidirectionally assist the user-desired movement of the drawer. Additionally, a position measuring device can be provided, which generates position signals by means of which the current actual position, actual speed, and actual acceleration can be calculated as a function of the measured position. Target values ​​can also be determined in the same way, so that approximately equal force consumption can be achieved when the drawer load changes.

[0004] An assembly with a movable furniture part is already known from the publication EP 2 642 899 A1, in which different trigger sensitivities can be generated via two sensors when a force is applied to a drawer.

[0005] A drawback of the prior art is that an overload clutch must be incorporated into the drive in order to be able to guarantee proper functionality of the drive when vibrations or strong forces are applied to the movable furniture part.

[0006] The technical problem addressed by the present invention is therefore to provide an improved assembly with respect to the prior art, which at least partially overcomes the drawbacks of the prior art and which is distinguished by a particularly advantageous compensation of the influence of external forces on the assembly.

[0007] Therefore, according to the invention, there is provided at least one retraction device for a movable furniture part and at least one rack operatively connected to at least one electric drive, wherein the at least one retraction device is preferably arranged directly on the at least one drawer rail, the at least one rack is preferably arranged indirectly on the at least one drawer rail, the at least one rack is removably arranged on the at least one support device and / or the at least one support device is removably arranged on the at least one retraction device.

[0008] This makes it possible for the first time to configure an overload clutch via the involved component elements via a detachable connection, in particular a double detachable connection, thereby making it possible to dispense with an overload clutch in the electric drive unit 6.

[0009] For example, when an increased load is applied to the rack (e.g., during vibration or due to the application of an inappropriate force to a movable furniture part), tolerances in the interaction between the gear of the electric drive and the rack that result in a load prevent a complete decoupling between the electric drive and the rack without losing the function of the overload clutch, so that the position of the drawer rail relative to the cabinet rail remains unambiguously identifiable via the relative position between the rack and the gear.

[0010] Decoupling of the electric motor is not essential and can be achieved, for example, via a freewheel clutch. The required reference travel can be interrupted, in which case the support device functions as a coupling device.

[0011] Advantageous embodiments of the invention are defined in the dependent claims.

[0012] Further details and advantages of the invention will be explained in more detail below with reference to the illustrated embodiment and the description of the drawings.

Brief Description of the Drawings

[0013] [Figure 1a] It is a perspective view showing a guide device for furniture driven by an electric drive device according to a preferred embodiment. [Figure 1b] It is a view showing a perspective view of a guide device for furniture driven by an electric drive device according to a preferred embodiment, together with a detailed view enlarged in the area of the electric drive device. [Figure 2] It is a view showing a perspective view of the guide device according to the embodiment shown in FIG. 1b, together with a detailed view enlarged in the area of the connection portion of the rack to the drawer rail. [Figure 3] It is a view showing a perspective view of the guide device according to the embodiment shown in FIG. 1b, together with a detailed view enlarged in the area of the connection portion of the rack to the drawer rail. [Figure 4] It is a view showing a perspective view of the guide device according to the embodiment shown in FIG. 1b, together with a detailed view enlarged in the area of the connection portion of the rack to the drawer rail. [Figure 5] It is a view showing a top view of the guide device according to the embodiment shown in FIG. 1b, together with a detailed view enlarged in the connection area between the rack and the gear of the electric drive device. [Figure 6] It is a view showing a bottom view of the guide device according to the embodiment shown in FIG. 1b, together with a detailed view enlarged in the area of the connection portion of the electric drive device to the cabinet rail. [Figure 7a] It is a top view showing the electric drive device according to the embodiment shown in FIG. 1b, together with a support for connection to the cabinet rail. [Figure 7b] It is a perspective view showing the electric drive device according to the embodiment shown in FIG. 1b, together with a support for connection to the cabinet rail. [Figure 8a] It is a perspective view seen from the front side showing the electric drive device according to the embodiment shown in FIG. 1b with the casing removed. [Figure 8b] It is a perspective view seen from the back side showing the electric drive device according to the embodiment shown in FIG. 1b with the casing removed. [Figure 9] It is an exploded view showing a distance measuring device of an electric drive device according to the embodiment shown in FIG. 1b. [Figure 10] It is a detailed view seen from above showing an electric drive device according to the embodiment shown in FIG. 1b enlarged in the region of the position sensor. [Figure 11] It is a view showing a perspective view of an electric drive device according to FIG. 8a together with a detailed view enlarged in the region of a protective body in a casing for protecting a transmission from wear by a belt. [Figure 12] It is a view showing a perspective view of an electric drive device according to FIG. 8a together with a detailed view enlarged in the region of a belt drive device provided with belt tensioners on both sides. [Figure 13a] It is a perspective view showing a transmission of an electric drive device according to the embodiment shown in FIG. 1b. [Figure 13b] It is a perspective view showing a transmission of an electric drive device according to the embodiment shown in FIG. 1b. [Figure 14a] It is a plan view showing a freewheel clutch of an electric drive device according to the embodiment shown in FIG. 1b. [Figure 14b] It is a perspective view showing a freewheel clutch of an electric drive device according to the embodiment shown in FIG. 1b. [Figure 15] It is a perspective view showing a guide device according to another preferred embodiment provided with an electric drive device arranged on one side. [Figure 16] It is a graph showing an unambiguous position measurement or an absolute distance measurement of a movable furniture part along a guide device by a distance measuring device according to the embodiment of FIG. 9 via a sensor angle related to the drawer length.

[0014] FIG. 1a shows a furniture provided with a movable furniture part 2 in the form of a drawer, and this furniture part can be moved by an electric drive device 6 relative to a fixed furniture part 1 in the form of a furniture cabinet via a guide device 3 in the form of a drawer slide.

[0015] The movable furniture part 2 can be divided into a first movable furniture part 41 and a further movable furniture part 42, in which case the further movable furniture part 42 is arranged below the first movable furniture part 41 in the use position 14 of the device.

[0016] However, the furniture is not limited to drawers and may generally include other containers, for example the furniture may exist as a furniture cabinet with flaps, a shelf with folding and / or sliding doors, or the like.

[0017] Figure 1b shows the furniture, shown without one movable furniture part 2, as an assembly including a fixed furniture part 1, a furniture part 2 that is movable relative to the fixed furniture part 1, and two guide devices 3 for guiding the movable furniture part 2 relative to the fixed furniture part 1.

[0018] The assembly comprises an electric drive 6 for at least partly automated movement of the movable furniture part 2 relative to the fixed furniture part 1, the electric drive comprising an electric motor 7 capable of supplying 230V. The energy supply to the electric motor 7 is generally optional and it may be operated with a different voltage. In general, the voltage may be lower - in particular depending on local or regional current network characteristics - in order to supply the electric motor 7 with sufficient energy.

[0019] The guide devices 3 each comprise a cabinet rail 4 arranged on the fixed furniture part 1 and a drawer rail 5 arranged on the movable furniture part 2. Generally, an intermediate rail may be arranged at least partially between the cabinet rail 4 and the drawer rail 5, but this is generally not necessary - in particular also for full draw-out of the movable furniture part 2 due to the front-side arrangement of the connection to the electric drive 6 and the rack 9.

[0020] The detailed view shows an enlarged view of the connection of the electric drive 6 on the cabinet rail 4 and the connection of the rack 9 on the drawer rail 5, where the drawer rail 5 includes a first interface 34 (possibly multiple first interfaces 34) suitable for fixing the ejection device 11 and the retraction device 8 to the drawer rail 5.

[0021] A retraction device 8, which is generally not required, is arranged at the first interface 34. Alternatively or additionally, an ejection device 11, in particular a mechanical or electrical type, may be arranged at the first interface 34. Preferably, the ejection device 11 includes a tip-on function, by which the ejection process can be triggered by an overpressure movement.

[0022] The cabinet rail 4 includes a second interface 35 (possibly a plurality of second interfaces 35) suitable for fastening a follower 36 for the ejection device 11 or the retraction device 8 to the cabinet rail 4. The second interface 35 is located on the underside (not visible in this view) of the cabinet rail 4 (see FIG. 6).

[0023] The electric drive 6 is arranged at the second interface 35 and the rack 9 for transmitting the force from the electric drive 6 to the drawer rail 5 is arranged at the first interface 34 .

[0024] The electric drive 6 is coupled via a clip coupling 71 and via a pivoting inward process for hooking (see FIG. 6). The rack 9 is coupled via the clip coupling 71 in a series of translational pushing-in processes into the retraction device 8 or drawer rail 5. For example, the clip coupling 71 (on the rack 9, retraction device 8, or drawer rail 5) can have a lockable web or locking projection 81, in which case, generally, alternatively or additionally, a hook 75 is also possible. In this example, the rack 9 is coupled to the retraction device 8, which may optionally have an ejection device 11 or which may optionally be attached to the rack (also conceivable as an alternative to the retraction device 8). It is equally possible to couple the rack 9 directly to the drawer rail 5. An indirect coupling of the electric drive 6 (for example, via the driver 36 for the retraction device 8) is also possible, although a direct connection is preferred in this case.

[0025] The rack 9 can be broadly designed to also include equivalent means such as a belt (possibly with teeth 18), cable or the like for transmitting force between the electric drive 6 and the drawer rail 5.

[0026] In the use position 14 of the assembly, the electric drive 6 is arranged almost completely on the cabinet rail 4 below the movable furniture part 2, whereby the furniture part front surface 23 may possibly protrude below the top surface of the electric drive 6 or below the electric drive 6 in the vertical direction 15 (e.g. for contact of the trigger sensor 59). The bottom surface of the movable furniture part 2 is arranged completely above the electric drive during the movement of the movable furniture part. The movable furniture part 2 moves above the electric drive 6 during use.

[0027] The electric drive 6 is fixedly arranged on the cabinet rail 4 and is permanently connected to the rack 9 for transmitting movement over the entire distance section 13 for the movable furniture part 2 along the guide device 3.

[0028] The movable furniture part 2 comprises a furniture part front face 23, in which the electric drive 6 is arranged on the cabinet rail 4 in the use position 14 of the assembly in the region of the free end 24 of the cabinet rail 4 facing the furniture part front face 23.

[0029] In the closed position, the electric drive 6 is arranged flush with the drawer rail 5 or rack 9. The rack 9 allows - by mounting on the cabinet rail and / or by using a specific trigger sensor type - to compensate for drawer losses.

[0030] The electric drive 6 is arranged approximately flush with the free end 24 of the cabinet rail 4 in the closed and open positions 30 .

[0031] The fixed furniture part 1 has two furniture panels 64 oriented vertically and parallel to one another in the position of use 14, with exactly one electric drive 6 being arranged indirectly on one of the furniture panels 64 via the cabinet rail 4. However, it is also possible, but not necessarily required, for another electric drive 6 or an additional rack 9 to be arranged on the opposite furniture panel 64.

[0032] The movable furniture part 2 comprises a furniture part front face 23 in the use position 14 of the assembly, in which case the electric drive 6 is arranged on the cabinet rail 4 in the region of the free end 24 of the cabinet rail 4 facing the furniture part front face 23 (approximately flush with the free end 24 or the drawer rail 5 in the closed position or the rack 9 in the closed position).

[0033] Figure 2 shows the connection of the electric drive 6 to the cabinet rail 4, omitting the surrounding furniture parts 1 and 2, where the drawer rail 5 extends completely over the distance section 13 as the pull-out distance for the movable furniture part 2.

[0034] The enlarged detail shows the connection of the drawer rail 5 or rack 9 on the retraction device 8, with the ejection device 11 shown in dotted lines, which can alternatively or additionally be arranged on the first interface 34. It is also conceivable to provide a locking device 69 on the first interface 34 for preventing movement of the movable furniture part 2. The retraction device 8 has integrated therein a damping device 12, which may also be provided as a separate component element.

[0035] FIG. 3 shows a guide device 3 with an electric drive 6 including an electric motor 7 (capable of supplying 230 V) for the automated movement of a movable furniture part 2 or a drawer rail 5 .

[0036] A retraction device 8 for the movable furniture part 2 and a rack 9 operatively connected to the electric drive 6 are assembled, the retraction device 8 being arranged directly on the drawer rail 5 and the rack 9 being arranged indirectly via the retraction device 8 on the first interface 34 of the drawer rail 5. Generally, the rack 9 can alternatively or additionally also be in direct contact with the drawer rail 5.

[0037] The rack 9 is removably arranged on a support device 10, and the support device 10 is removably arranged on the retraction device 8.

[0038] A releasable connection of the support device 10 in this context means a connection that can be broken without effort, preferably without the use of tools.

[0039] The support device 10 is arranged between the rack 9 and the retraction device 8 in a horizontal direction 16 and may generally be provided with the rack 9 pointing downwards in a vertical direction 15 .

[0040] The support device 10 or the retraction device 8 may have a mechanical or electrical ejection device 11, and the retraction device 8 includes a damping device 12 for damping the movement of the movable furniture part 2 in the area of ​​the closed position.

[0041] A stationary electric drive 6 is permanently connected to the rack 9 for transmitting motion over the entire distance 13 along the guide device 3, the electric drive 6 being connected to an electric motor 7 and having a gear 17 meshing with the rack 9.

[0042] The rack 9 is arranged laterally over a distance 13 between the electric drive 6 and the drawer rail 5 .

[0043] In this embodiment, exactly one electric drive unit 6 is provided on one of the two cabinet rails of the guide device 3, and exactly one rack 9 is provided on one of the two drawer rails 5 of the guide device 3; generally, two electric drive units 6 may be used on both cabinet rails 4.

[0044] The power supply to the electric drive 6 or to any other current consumers that may be provided, such as the lighting means 31 shown in FIG. 6, takes place via the cabinet rail 4, the power supply being alternatively or additionally guided via the rack 9. The power supply can be guided between both cabinet rails 4 of the two provided guide devices 3, in order to supply energy to, for example, a further trigger sensor 65. It is also possible to power each cabinet rail 4 (or rack 9) separately.

[0045] The teeth of the rack 9 are oriented in a horizontal direction 16 away from the drawer rail 5 in the use position 14 of the assembly, although a generally downward orientation in a vertical direction 15 is also possible.

[0046] The rack 9 is connected to the gear 17 of the electric drive 6 and is supported so that it can bend (also considered to be pivotable) relative to the drawer rail 5 in the horizontal direction 16 (via the connection to the support device 10 or by the connection of the support device 10) and thus can be moved laterally to a limited extent. For example, the rack 9 can be supported so that it can be moved vertically to a limited extent in the vertical direction 15 (away from the gear 17) even in the case of vertical toothing 18 in the vertical direction 15. This allows a secure connection to the elastic drive 6 and also reduces the assembly effort due to reduced tilt and reduces noise emissions due to elastic or flexible deformation. For example, the rack 9 can be preloaded by a spring or by inherent elasticity in the direction of the gear 17, which ensures a positive connection to the electric drive 6 during operation.

[0047] Particularly preferably, the rack 9 is designed to be flexible, so that a reliable, harmonious and continuous transmission of movements can be ensured by elastic deformation.

[0048] A detachable connection, particularly a double detachable connection, allows an overload clutch to be formed via the involved components, thereby eliminating the need for an overload clutch 68 in the electric drive unit 6. For example, tolerances in the interaction between the gear 17 and the rack 9, which may result in a load being increased on the rack 9 (e.g., during vibrations or due to the application of an inappropriate force to the movable furniture part 2), may prevent a complete decoupling between the electric drive 6 and the rack 9 without losing the effect of the overload clutch, so that the position of the drawer rail 5 relative to the cabinet rail 4 remains unambiguously identifiable via the relative position between the rack 9 and the gear 17. Decoupling of the electric motor 7 is not required and can be achieved, for example, via the freewheel clutch 29. The required reference travel may be interrupted, in which case the support device 10 functions as a coupling device.

[0049] FIG. 4 shows the guide device 3 in the region of the rear coupling device for the movable furniture part 2 together with an enlarged detail of the drawer rail 5 .

[0050] The drawer rail 5 includes a support device 21 for the rack 9, which is arranged on the drawer rail 5 and the rack 9, and a support 22 for the electric drive 6 for connecting the electric drive 6 to the cabinet rail 4 can be passed by the rack 9 and the support device 21 in the course of a series of relative movements between the drawer rail 5 and the cabinet rail 4.

[0051] FIG. 5 shows the guide device 3, in which an enlarged detail shows the connection between a gear 17 of the electric drive 6, which is operatively connected to the electric motor 7, and the toothing 18 of the rack 9.

[0052] The electric motor 7 (or electric drive 6 ) comprises, at its connection with the gear stage 55 of the electric drive 6 , a gear 17 which meshes with the rack 9 .

[0053] The gear 17 is oriented horizontally 16 towards the drawer rail in the use position 14 of the assembly; in this case, a gear 17 of the electric drive 6 oriented vertically 15 upwards is also possible.

[0054] The rack 9 is arranged between the electric drive 6 and the drawer rail 5. The guide device 3 is in the closed position, in which case the movable furniture part 2 arranged on the drawer rail 5 can be positioned in an end position.

[0055] In order to improve the degree of force transmission to the movable furniture part by the energy transmitted via the electric drive 6 in terms of time and / or intensity, the electric drive is controlled by a microcontroller 37 which functions as an open-loop and / or closed-loop control device 44 and acts as a computing unit.

[0056] An exemplary computation-unit-assisted method for moving a movable furniture part 2 relative to a fixed furniture part 1 along a guide device 3 by means of an electric drive device 6 for at least partially automated movement of the movable furniture part 2 relative to a fixed furniture part 1 can be implemented as follows: a microcontroller 37 including a computation unit and a memory unit data-connected to the computation unit determines a model of the movable furniture part 2 according to at least one static data set stored in the memory unit, manually moves the movable furniture part 2 starting from either a partially or fully open position 30 or a closed position towards or against the closed position, and the microcontroller 37 calculates a predicted motion trajectory of the movable furniture part 2 along the guide device 3 according to at least one dynamic data set.

[0057] The static data set may include, for example, the mass of the movable furniture part 2, the friction of the movable furniture part 2 in the guide device 3, the dimensions of the movable furniture part 2, the load on the movable furniture part 2, the dimensions of the guide device 3, the distance section 13 along the guide device 3, the tolerance limits, etc.

[0058] The distance section 13 may generally be based on the drawer distance for the movable furniture part 2 or the longitudinal extension of the rack 9, over which distance section the drive by the electric drive 6 is at least partly effected via automated control. Drive over the distance section 13 is possible; drive over a partial area of ​​the distance section 13 is preferred.

[0059] The dynamic data set may include, for example, the absolute distance traveled by the movable furniture part 2 relative to the fixed furniture part 1, the speed of the movable furniture part 2, the load on the movable furniture part 2, the acceleration profile of the movable furniture part 2 (typically determined via a speed measuring device 52), the acceleration distance of the movable furniture part 2, the kinetic energy of the movable furniture part 2, etc.

[0060] The static or dynamic data set can be determined in one reference run of the movable furniture part 2 or over several reference runs, possibly with varying loads of the movable furniture part 2. Alternatively or additionally, the static data set can be stored in the memory unit without a reference run and the static or dynamic data set can be compared with or corrected on the basis of the data set stored in the memory unit.

[0061] The following aspects are specified in this embodiment but may not necessarily be implemented:

[0062] Depending on the predicted movement trajectory, the microcontroller 37 decides whether the electric drive 6 should apply a force to the movable furniture part 2 or whether the movable furniture part 2 should be manually movable within the freewheel region. The electric motor 7 has a freewheel clutch 29 which separates the force transmission from the electric motor 7 to the movable furniture part 2 in the freewheel region.

[0063] The microcontroller 37 calculates, depending on at least one static data set and at least one dynamic data set, whether the movable furniture part 2 will reach the closed position without applying force via the electric drive 6, and in this case determines the speed of the movable furniture part 2 as it enters the closed position depending on the damping power of the damping device 12 arranged on the movable furniture part 2 or on the fixed furniture part 1.

[0064] The microcontroller 37 defines a speed profile for the drive of the movable furniture part 2, which is transmitted via the electric drive 6, depending on the predicted movement trajectory, and the electric drive 6 applies a force to the movable furniture part 2 depending on this speed profile. The speed profile is created depending on at least one static data set or at least one dynamic data set, and energy is applied to the movable furniture part 2 if the speed of the movable furniture part 2 is below this speed profile, and the electric drive 6 brakes the movable furniture part 2 and starts transmitting a force to the movable furniture part 2 at a predefined speed threshold or a predefined position threshold if the speed of the movable furniture part 2 is above this speed profile.

[0065] The microcontroller 37 stores a learning algorithm in the form of artificial intelligence, including a neural network with machine learning or deep learning, which analyzes and compares historical predicted movement trajectories with each other, which is used for determining future predicted movement trajectories, future velocity profiles or future decisions for applying forces to the movable furniture part 2 depending on the respective static or dynamic data set.

[0066] The movement patterns of the movable furniture piece 2 along the guide device 3 are used as training data for the artificial intelligence. It has proven particularly advantageous if different guide devices 3 and varying force applications or loads on the movable furniture piece 2 are used to train the learning algorithm. The movement patterns of the specifically existing guide devices as well as the specific movable furniture piece 2 can be added—in particular continuously—to the training data for learning purposes.

[0067] The electric drive 6 remains stationary on the cabinet rail 4 during the movement of the movable furniture part 2 and is permanently connected to a rack 9 arranged on the drawer rail 5 .

[0068] The movable furniture part 2 can be driven by an electric drive 6 via the drawer rails 5 starting from the open position 30 or from a position between the open position 30 and the closed position over the entire distance 13 to the closed and open positions 30, or only over a partial region of the distance 13, the application of a force by the electric drive 6 starting from the closed position towards the open position 30 being initiated by an over-pressing movement of the movable furniture part 2 or exclusively via an electronic trigger sensor 59. In the non-driven partial regions of the distance 13, the movable furniture part 2 can be moved manually in a freewheel region, whereby no force is applied to the movable furniture part 2 by the electric motor 7.

[0069] It has been found that the driven partial area of ​​the distance section 13 is particularly suitable in the direction of the open position 30 - in particular from the closed position - between 50 mm and 150 mm, and in the direction of the closed position - in particular from the completely open position 30 - between 5 mm and 20 mm.

[0070] The movement of the movable furniture part 2 in the direction of the closed or open position 30 can be damped, braked or blocked via the electric drive 6, a force being exerted on the movable furniture part 2 in the direction of the closed position by the retraction device 8 in the area of ​​the closed position. However, the retraction device 8 is not necessarily required, in which case the retraction device 8 can be replaced, for example, by the electric drive 6.

[0071] An algorithm or computer program product containing instructions for implementing the method may be stored in the microcontroller 37 or the open-loop control device and / or the closed-loop control device 44, may be transmitted on a data transmission signal or may be stored on a - in particular non-volatile - data carrier.

[0072] The calculation unit of the microcontroller 37, or the open-loop and / or closed-loop control device 44, is configured to determine a model of the movable furniture piece 2 depending on at least one static data set stored in the memory unit, and to calculate a predicted movement trajectory of the movable furniture piece 2 along the guiding device 3 depending on at least one dynamic data set—possibly also stored in the memory unit. The electric drive 6 comprises a calculation unit.

[0073] The memory unit has a sufficient memory capacity to provide the necessary information for the model. The calculation unit has a sufficient computing power to calculate the model for the velocity profile to be applied to the movable furniture part 2 with the accuracy required for use in the furniture field. The memory capacity and computing power can be adapted depending on the desired accuracy of the model or of the output parameters, such as the velocity profile, to be generated from the model.

[0074] The speed profile preferably includes the amplitude of the acceleration, the distance of the acceleration, the distance section 13 or a sub-region of the distance section 13 along which the movable furniture part 2 should be or should be driven at this speed, the maximum speed and the like. As input parameters, for example, the currently existing load of the movable furniture part 2 or the impact transmission (discrete or continuous) of the movable furniture part 2 by an operator can be used as dynamic parameters.

[0075] The method, and in particular the microcontroller 37 or the open-loop and / or closed-loop control device 44, can result in the detection of auxiliary movements for the movement of the movable furniture part 2, in which case the movable furniture part 2 can be driven in the closing or opening direction, for example, in such a way that the movable furniture part 2 is moved to an end position (closed or open position 30) almost noiselessly and / or without significant force acting on the component elements. In general, partial driving to the end positions or complete driving - in particular over the entire distance section 13 - is possible.

[0076] The increased functionality of the method compared to the prior art makes it possible to prevent undesirable and inconsistent movement trajectories - particularly when the force and / or load on the movable furniture part 2 changes or when the guide device 3 changes - and in this case to prevent inappropriately high or low speeds of the movable furniture part 2 that would make it impossible to move the movable furniture part 2 to the desired end position or that could cause damage.

[0077] The microcontroller 37 may be interpreted as or may include an open-loop controller and / or a closed-loop controller 44 as a computational unit.

[0078] 6 shows that the electric drive 6 comprises a plurality of lighting means 31 which are stationary relative to the fixed furniture part 1, although in general only one lighting means 31 may be provided. The lighting means 31 are arranged on the electric drive 6.

[0079] The lighting means 31 are present in the form of a lamp 38 - which is configured as an LED lamp - and are integrated in the electric drive 6 in a defined area in the housing 47 of the electric drive 6 .

[0080] A further lighting means 31 is present in the form of a strip-like lighting means 40—configured as an LED strip—which is arranged directly on the electric driver 6. The dotted lines indicate schematically that a further lighting means 31 may also be present, for example in the form of an area-like lighting means 39—which in this case is provided as an LED area. For example, the further lighting means 31 may also be arranged indirectly on the electric driver 6—for example by connecting a current line 32 (not shown for the sake of clarity) to a current line 32 of the electric driver 6.

[0081] The lighting means 31 is oriented on the underside of the electric drive 6 in such a way that another movable furniture part 42 can be illuminated by the lighting means 31, in this case the lighting means 31 being arranged on the electric drive 6 of the first movable furniture part 41. However, the lighting means 31 may generally alternatively or additionally be arranged on the electric drive 6 of the first movable furniture part 41 or on the current line 32 of the electric drive 6 of the first movable furniture part 41 in such a way that the first movable furniture part 41 can be illuminated by the lighting means 31.

[0082] As will be explained in more detail in Figures 9 and 10, a distance measuring device 33 is provided, which can be used, alternatively or supplementally to the diagrammatically shown movement sensor 43, to detect a relative position—such as a fully or partially open position 30—of the movable furniture part 2 relative to the fixed furniture part 1. The lighting means 31 can be activated by an open-loop and / or closed-loop control device 44 or a microcontroller 37 depending on the determined relative position. The distance measuring device 33 and the movement sensor 43 are arranged in the electric drive 6 and are connected to the current lines 32 of the electric drive 6 and to the lighting means 31. In general, alternatively or supplementally to the distance measuring device 33 or the movement sensor 43, a distance sensor device 50 (see Figure 1b) can be used to determine the relative position for activating the lighting means 31. The number of lighting means 31 is generally arbitrary.

[0083] The lighting means 31 is arranged between both cabinet rails 4 of the guide device 3, with the strip-shaped lighting means 40 being arranged laterally between the cabinet rails 4 and extending completely linearly between the two cabinet rails 4.

[0084] Between the two cabinet rails 4 there is a direct current connection which can be used to illuminate the movable furniture part 2, the current connection or power supply being guided via a cabinet rail or a rack 9 of at least one of the two cabinet rails 4. The electric drive 6 is stationarily arranged on one of the two cabinet rails 4, and the rack 9 is arranged on the drawer rail 5 of the guide device 3 in order to constantly transmit the movement from the gear 17 of the electric drive 6 to the drawer rail 5. The electric drive 6 and the current lines 32 for the electric drive 6 and the lighting means 31 are stationarily arranged on the guide device 3 - on the cabinet rail 4.

[0085] Via the open-loop and / or closed-loop control device 44 or the microcontroller 37, a force can be applied to the movable furniture part 2 via the electric drive 6, whereby a dual function is obtained by coupling to the cabinet rail 4. The electric drive 6 is configured to move the movable furniture part 2 at least partially relative to the fixed furniture part 1, in which case the electric drive 6 comprises a lighting means 31 arranged in the electric drive 6 or in a current line 32 of the electric drive 6.

[0086] An exemplary method for illuminating a movable furniture part 2 (possibly another movable furniture part 42) can be described as follows: the movable furniture part 2 is moved at least partially automatically by an electric drive 6 along a guide device 3 relative to a fixed furniture part 1, and a lighting means 31 arranged on the electric drive 6 or on a current line 32 of the electric drive 6 is activated, whereby the movable furniture part 2 is illuminated by the lighting means 31, wherein the movable furniture part 2 is moved and the lighting means 31 remains stationary. In particular, the other movable furniture part 42 is illuminated by the lighting means 31 in response to a movement of a first movable furniture part 41, wherein the lighting means 31 remains stationary on the electric drive 6 of the first movable furniture part 41. For this purpose, the relative position of the other movable furniture part 42 can be detected, and the lighting means 31 is then activated via an open-loop and / or closed-loop control device 44 or a microcontroller 37 in response to the determined relative position. For example, an algorithm or computer program product may be stored in the open-loop controller and / or the closed-loop controller 44 or the microcontroller 37, containing instructions that, when executed by the computing unit, direct the computing unit to perform the method from a memory unit in data communication with the computing unit.

[0087] Preferably, light in the visible wavelength range is emitted, in which case it may be specified, for example, that the wavelength range and / or intensity of the lighting means 31 is changeable and / or adjustable - possibly via the electric drive 6 or a light receiving unit of the electric drive 6 for configuring the electric drive 6.

[0088] In general, the lighting means 31 can alternatively or additionally emit light in the infrared range, for example for heating, or in the UV wavelength range—particularly the UVC wavelength range—for sterilization or disinfection. This allows for the removal of unwanted microorganisms from contents or surfaces or for adjusting the interior of the movable furniture part 2 to a desired temperature, so that, for example, food can be irradiated with varying intensities or adjustable wavelength ranges—particularly in combination with a vacuum drawer, and possibly adjustable. Positioning the stationary electric drive 6 above the contents compartment is particularly suitable for this purpose. A locking device dependent on the activation of the lighting means 31 is also conceivable.

[0089] Basically, supplying energy by introducing current into the movable furniture part 2 is time-consuming and complicated, since the movement of the movable furniture part 2 has to be taken into account. However, lighting the movable furniture part 2 has the advantage that the contents present in the movable furniture part 2 can be unambiguously identified, especially when the light quality is poor or at night. In particular, if the electric drive 6 is arranged fixedly on the cabinet rail 4, the introduction of current via the cabinet rail 4 can also serve a dual function, in order to particularly advantageously utilize the energy for supplying the lighting means 31.

[0090] Figure 7a shows an electric drive 6 with an electric motor 7 capable of supplying 230V, in which case the electric drive 6 comprises a plate-shaped support 22 for placement on the cabinet rail 4 of the guide device 3, the support 22 comprising an inclined surface 72 which is configured in such a way that the electric drive 6 can be attached to the cabinet rail 4 arranged on the fixed furniture part 1 in the mounted state (see Figure 6 in conjunction with Figure 1b) without collision via an inward pivoting process.

[0091] The electric drive 6 has a longitudinal direction 27, and the bevel 72 of the support 22 is oriented at an acute angle of 5° to 30° relative to this longitudinal direction 27.

[0092] The ramp 72 is arranged at a free end 73 of the support 22 that projects laterally from the electric drive unit 6 and is spatially spaced from the electric drive unit 6 and the electric motor 7 for placement on the cabinet rail 4.

[0093] The electric drive 6 includes two coupling devices 74 on the support 22 for attachment to the second interface 35 of the cabinet rail 4, although one coupling device 74 is generally sufficient. One coupling device 74 is present in the form of a hook 75 stamped and bent from sheet metal, while the support 22 is provided with a further hook 76 as a corresponding support for attaching the electric drive 6 to the cabinet rail 4. For example, the further hook 76 may carry a follower 36 for the retraction device 8 or the ejection device 11 (possibly with a tip-on function). The further hook 76 may be used as the second interface 35.

[0094] The other coupling device 74 is present as a clip connection element 71 (as are both coupling devices 74 as hooks / further hooks 75, 76). The other coupling device 74 is formed as a locking projection 81. The electric drive 6 can be translationally pushed onto the cabinet rail 4 via the locking projection 81 and the support 22 and can be securely fixed to the cabinet rail 4 via both hooks during the inward pivoting process, with the secure fixation generally already achieved via the locking projection 81.

[0095] During assembly, the locking projection 81 can resiliently slide into the corresponding locking recess—due to a notch in the material at its side. Between the hooks 75, 76, an extension is found, which serves as a pivot point for the rotational movement after translational contact. In general, locking can also take place as a clip connection via a purely translational movement, for example by means of a lockable web.

[0096] The connecting device 74 in the form of a hook 75 overlaps an opening 77 in the support 22. The opening 77 has a dual function in relation to the manufacturing process of the support 22, since it can be used, for example, as a holding device during manufacturing (e.g., for handling or coating). The opening 77 may generally be arranged alternatively or additionally in the cabinet rail 4, again making use of the dual function in relation to the connection and manufacturing method. The hook 75 protrudes through the opening 77 in the support 22 (or in the cabinet rail 4). The electric drive 6 may generally be arranged indirectly via the support 22 in the cabinet rail 4. The support 22 may be formed from multiple parts. The hook 75 or the locking projection 81 may generally be arranged on the cabinet rail 4 as a kinematic inverse. The multi-part construction of the opening 77 or the support 22 is generally not required. Preferably, an opening 77 is present in the cabinet rail 4, into which the hook 75 engages, and in this case the opening 77 defines the position of the cabinet rail 4 in the facility for manufacturing the cabinet rail 4. Another movement technology may be coupled to the hook 75.

[0097] An exemplary method for retrofitting the guide device 3 with the electric drive 6 in the assembled state of the guide device 3 can be described as follows: preparing the electric drive 6 for the at least partially automated movement of the movable furniture part 2, and mounting the guide device 3 on the fixed furniture part 1 (see FIG. 1a) for guiding the movable furniture part 2 relative to the fixed furniture part 1, optionally removing the ejection device 11, the retraction device 8, the follower 36 for the ejection device 11 or the follower 36 for the retraction device 8 from the guide device 3. The electric drive 6 is then positioned at the second interface 35 of the cabinet rail 4 almost completely below the movable furniture part 2 to be moved (possibly including the downwardly protruding furniture part front face 23), and the rack 9 is positioned at the first interface 34 of the drawer rail 5 for transmitting forces from the electric drive 6 to the drawer rail 5.

[0098] The first interface 34 of the drawer rail 5 may generally be provided by a retraction device 8 .

[0099] At the second interface 35 there may be arranged a locking device 69 (schematically shown by dotted lines) for locking the movement of the movable furniture part 2 relative to the fixed furniture part 1, and a follower 36 for the ejection device 11. The follower 36 for the retraction device 8 provided in this embodiment is shown by dotted lines at the second interface.

[0100] The ramp 72 reduces the risk of collision with the stationary furniture part 1 or the cabinet rail 4 during assembly of the electric drive 6 to the cabinet rail 4; in this case, the electric drive 6 can be attached to an existing guide device 3 as an add-on. Similarly, the rack 9 (or equivalent) can be subsequently connected to the drawer rail 5 for transmitting motion from the electric drive 6 to the movable furniture part 2. The interfaces 34, 35, combined with the components arranged at the interfaces, therefore, on the one hand ensure user-friendly retrofitting and, on the other hand, have a multi-function for connecting multiple, flexibly interchangeable and variable motion technologies. This avoids the need for a large number of interfaces for multiple motion technologies, and individual motion technologies can be attached as add-ons with simple assembly. It is not necessary to provide additional structural space for the electric drive 6, and furthermore, the energy supply for the movable furniture part 2 and the sufficient motion transmission to the movable furniture part 2 are facilitated.

[0101] This entails a second aspect (related via a synergistic effect of technical effects) regarding the comfortable and resource-saving (in particular in terms of the available installation space) mounting of the electric drive 6, in which case - in particular via mounting to the cabinet rail 4 and / or by means of a purpose-suited gearing configuration and / or selection of the electric motor 7 - the electric drive 6 can be positioned below the movable furniture part 2 in a compact or narrow configuration, thereby making optimal use of the depth of the fixed furniture part 1 and no need for a movable power supply.

[0102] FIG. 7b differs from FIG. 7a only in that the electric drive 6 is shown in perspective.

[0103] The electric motor 7 is arranged inside a casing 47 which, in the position of use 14 of the assembly, has a thickness 67 of less than 100 mm in the vertical direction 15. It is possible to achieve a thickness 67 of less than 80 mm. The thickness 67 is preferably less than 60 mm (although less than 40 mm is also conceivable), so that in conventional furniture the furniture part front face 23 protrudes below the underside of the electric drive 6.

[0104] 8a shows that the electric motor 7 of the electric drive 6 is provided in the form of a brushless outer rotor motor 66, although in general an outer rotor motor 66 with brushes, a disc rotor motor or a rod motor may also be provided. Outer rotor motors and disc rotor motors have a particularly flat design and are therefore preferred.

[0105] The electric motor 7 is connected to a number of gear stages 55 with gears 17 for driving the movable furniture parts 2. Due to the construction of the gear stages 55, the thickness 67 can be further reduced and other dimensionings can also be implemented compactly.

[0106] FIG. 8b differs from FIG. 8a only in that the components of the electric drive 6 which are operatively connected to the electric motor 7 are shown from a different perspective.

[0107] The electric drive 6 comprises a data interface 63 for transmitting at least one digital data set stored in the memory unit via a cable connection, whereby the data interface 63 may generally be configured as an alternative or supplement to the transmission of the digital data set via wireless signaling.

[0108] The electric drive 6 has a trigger sensor 59 for actuating the electric motor 7 for the closed position of the movable furniture part 2, in which case the electric drive 6 has a casing 47 which is removed in the drawing, and the trigger sensor 59 is arranged in this casing 47 for contact connection with the movable furniture part 2 in the use position 14 of the electric drive 6.

[0109] The trigger sensor 59 comprises a rod 60 and a microswitch 61, the trigger sensor being tactilely and electronically triggerable via the microswitch 61. Alternatively or additionally, a trigger sensor 59 which is exclusively electronically actuatable may be provided.

[0110] Figure 9 shows a distance measuring device 33 for assembly, which in this case is configured to detect the position of a movable furniture part 2 relative to a fixed furniture part 1, and by means of the distance measuring device 33 the position can be determined unambiguously as the absolute distance travelled by the movable furniture part 2 relative to the fixed furniture part 1.

[0111] The electric drive 6 comprises an electric motor 7 capable of supplying 230 V for at least partially automated movement of the movable furniture part 2 relative to the fixed furniture part 1, the distance measuring device 33 being arranged in the electric drive 6 or forming an integral component of the drive 6 interacting with the electric motor 7 and integrated into a casing 47 of the electric drive 6. However, arrangement in the casing 47 is not essential.

[0112] The movable furniture part 2 is translationally movable along the guide device 3 relative to the fixed furniture part 1 between a closed position and an open position 30 over a distance section 13 and is drivable by an electric drive 6 over the entire distance section 13. A distance measuring device 33 is provided for detecting the position of the movable furniture part 2 relative to the fixed furniture part 1, so that the relative position with respect to the distance measuring device 33 can be unambiguously determined.

[0113] The distance measuring device 33 has a potentiometer 49 in the form of a rotary potentiometer for detecting the position, whereby a Hall sensor (a magnet associated with Hall electronics) has proven particularly suitable as the underlying electronics. Alternatively or additionally, a distance sensor 50, for example a distance laser, can be provided. The distance sensor 50 can generally be arranged spatially separated from the electric drive 6. The distance measuring device 33 is arranged on the electric drive 6.

[0114] The absolute distance is detected starting from a predefined reference position, which in this case exists between the movable furniture part 2 and the reference position of the fixed furniture part 1 - in this embodiment given as a stop 51 for detecting the end position of the movable furniture part 2 - or the electric drive device 6 - in this embodiment given as the starting position of the gear 17 connected to the electric motor 7.

[0115] A speed measuring device 52 is provided in the form of a potentiometer 49 arranged on the electric motor 7 or integrated in the open-loop and / or closed-loop control device 44 or the microcontroller 35. The speed measuring device 52 is used to detect the speed of the movable furniture part 2 relative to the fixed furniture part 1, in which case the movable furniture part 2 can be driven by the electric drive 6 with a speed profile adapted to the determined speed and / or to the determined absolute distance of the movable furniture part 2.

[0116] The open-loop and / or closed-loop control device 44 or microcontroller 37 can be used to operate the electric motor 7 at a predefined speed determined by a speed measuring device 52 or at a predefined absolute distance determined by at least one distance measuring device 33.

[0117] The position as absolute distance traveled as a dynamic data set and the velocity as a dynamic data set are at least temporarily stored in a memory unit via a calculation unit of the microcontroller 37 or the open-loop control unit and / or the closed-loop control unit 44 to simulate a model.

[0118] The distance measuring device 33 comprises a first position sensor 53 in the form of a sensor wheel formed as a gear 17 and a further position sensor 54 in the form of another sensor wheel formed as a gear 17, in which case the absolute distance can be unambiguously detected via the relative rotational position of the position sensors 53, 54.

[0119] The first position sensor 53 and the further position sensor 54 are present in the form of a transmission stage 55 of the electric drive 6, which is not required for varying the speed of the drive from the electric motor 7 to the drawer rail 5; a further transmission stage 55 is used for this purpose. Via the first sensor wheel, a transmission ratio available for the distance measuring device 33 can be transmitted in the range of 1.01:1 to 1.2:1. Between the first and further sensor wheels, the transmission ratio is in the range of 1.2:1 to 2.3:1, and between the first and further sensor wheels, a transmission ratio in the range of 1.5:1 to 2:1 can be transmitted.

[0120] The sensor wheels as position sensors 53, 54 are configured as gear wheels 17, which are not required for the engagement of the electric drive 6 with the rack 9. The diameter 56 of the first sensor wheel is different from the diameter 56 of the second sensor wheel, so that absolute distances of up to 1200 mm can be unambiguously determined by the distance measuring device 33.

[0121] The absolute distance of the movable furniture part 2 is detected from the sum or difference of the rotation angles of both position sensors 53, 54 starting from the reference position, thereby making it possible to unambiguously calculate the distance between the movable furniture part 2 and the fixed furniture part 1.

[0122] The distance measuring device 33 comprises a magnet support 57 and a plastic part 58 beyond the casing 47 of the electric drive 6. The plastic part 58 serves a dual function as a substrate for the microcontroller 37.

[0123] The distance measuring device 33 comprises a tactile trigger sensor 59 in the form of a rod 60 and a microswitch 61, although it is generally also possible to provide other types of trigger sensors 59 which do not require a mechanical trigger, thereby making it possible to dispense with a front gap between the movable furniture part 2 and the fixed furniture part 1 for an over-pressing movement in the closed position for electronic triggering, thereby achieving furniture with a particularly aesthetically appealing appearance. A purely electronic trigger can for example be effected by contact of the movable furniture part 2, in which case a push or tap by the user of the movable furniture part on the furniture part front face 23 is detected, for example.

[0124] The distance measuring device 33 is arranged together with the electric drive device 6 in a fixed position on the cabinet rail 4, in which case a motion transmission of electric drive energy is carried out to the rack 9 arranged on the drawer rail 5 so that a force transmission can be transmitted over the entire distance section 13 or over a partial area of ​​the distance section 13 starting from any point along the distance section 13.

[0125] The distance measuring device 33 is arranged indirectly via the electric drive 6 on the cabinet rail 4 completely below the movable furniture part 2 in the use position 14 of the assembly. If necessary, the furniture part front surface 23 of the movable furniture part 2 may protrude below the electric drive 6 or the distance measuring device 33, for example to contact a trigger sensor 59. However, at least one bottom surface of the movable furniture part 2 is arranged above the electric drive 6.

[0126] Both gears 17 for position or speed detection have microchips. Another gear 17 transmits the energy of the electric motor 7 to the rack 9.

[0127] The electric drive 6 is arranged on the guide device 3 without contacting the movable furniture part 2, at least away from the closed position of the movable furniture part 2.

[0128] 10 illustrates an exemplary method for moving a movable furniture part 2 relative to a furniture part 1 at least partially along a distance section 13 of the movable furniture part 2 between a closed position of the movable furniture part 2 and a partially or completely open position 30 of the movable furniture part 2 by means of an electric drive 6 and a distance measuring device 33: via the distance measuring device 33, the position of the movable furniture part 2 relative to the fixed furniture part 1 is uniquely detected as the absolute distance traveled by the movable furniture part 2 relative to the fixed furniture part 1, and the movable furniture part 2 is translated by means of the electric drive 6 along the guide device 3 over a partial region of the distance section 13 between the closed and open positions 30 in accordance with the absolute distance determined by the distance measuring device 33. Driving the drawer rail 5 over the entire distance section 13 is generally possible via a permanent connection between the rack 9 and the electric drive 6, but this is not necessarily required.

[0129] In this method, the absolute distance can be determined via the relative positions of the position sensors 53, 54 starting from a predefined reference position, and can also be uniquely determined as the distance between the movable furniture part 2 (generally the drawer rail 5) and the fixed furniture part 1 (generally the cabinet rail 4) via the sum or difference of the rotation angles of the position sensors 53, 54 starting from the reference position.

[0130] Via the open-loop and / or closed-loop control device 44 or the microcontroller 37, the movable furniture part 2 can be driven with a speed profile adapted to the determined speed or determined absolute distance, and the electric drive 6 is operated at a predefined speed or for a predefined absolute distance. For example, an algorithm or a computer program product may be stored in a memory unit in data connection with the computing unit, which, when executed by the computing unit, comprises instructions that instruct the computing unit to perform the method.

[0131] The distance measuring device 33 makes it possible to ensure that the unambiguously detectable relative position, in particular between the fixed furniture part 1 or cabinet rail 4 and the movable furniture part 2 or drawer rail 5, can be unambiguously determined in which position the movable furniture part 2 is located along the distance section 13 of the guide device 3, even after a power failure or some other disturbance. The absolute distance traveled can be calculated unambiguously without a reference run, so that correct operation and, in particular, a position-adjusted drive can be guaranteed in a particularly disturbance-resistant manner.

[0132] Furthermore, via the detected position, proper detection of whether a force should be applied to the movable furniture part 2 by the electric drive 6 in the direction of the closed or open position 30 can be ensured. For example, based on the position, and possibly via the speed, it can be ascertained whether the user of the movable furniture part 2 wants to move the movable furniture part 2 within the freewheel region or wants to drive it in the closed or open direction. Furthermore, the speed profile to be transmitted to the movable furniture part 2 can be adapted, so that individual speeds can be transmitted individually for each position along the guide device. This position can provide additional information on whether the movable furniture part 2 should be freely movable in the freewheel region (possibly in both directions) or whether it should be driven (in the closed or open direction) via the electric drive, and what force should be applied or with which speed profile the movable furniture part 2 should be moved.

[0133] Figures 11 and 12 show the components of the electric drive 6, where Figure 11 shows in enlarged detail a protection 78 integrated into the casing 47, which protects the transmission - in particular the transmission stage 55 - from wear caused by the belt (drive belt 79).

[0134] 12 shows an enlarged view of the belt drive connected to the electric motor 7, in which two belt tensioners 80 are provided, which provide suitable tension for driving the electric drive 6. In general, only one belt tensioner 80 or more belt tensioners 80 may be provided, with two belt tensioners 80 arranged on opposite sides of the drive belt 79 proving to be particularly advantageous.

[0135] FIG. 13 a shows a transmission stage 55 of the electric motor 7 , in which the electric motor 7 is coupled to the freewheel clutch 29 .

[0136] The electric motor 7 may generally have an overload clutch 68, but this is only shown diagrammatically by a dotted line as it is not necessarily an inherent component.

[0137] Figure 13b differs from Figure 13a only in that it is shown from a different viewing direction.

[0138] Figures 14a and 14b show the freewheel clutch 29 as a component element including two gears 17 which can function as a transmission stage 55. The freewheel clutch 29 is generally not self-locking.

[0139] Technical details about this type of freewheel clutch 29, in particular about coil spring freewheel clutches, can be found in EP 2086372.

[0140] The freewheel clutch 29 is integrated into the electric drive 6 so that the freewheel clutch 29 can remain stationary on the cabinet rail 4 .

[0141] In particular, the drive 6 includes a freewheel clutch 29 which can decouple the movable furniture part 2 from driving by the electric motor 7 in the closing and opening directions along the distance section 13—for example, depending on the speed of the movable furniture part 2 or the position of the movable furniture part 2. By means of the freewheel clutch 29, the movable furniture part 2 can be moved between an open position 30 and a closed position—for example, depending on the force applied to the movable furniture part 2—decoupled from driving by the electric drive 6 in the freewheel region or driven by the electric drive 6 over the distance section 13 (generally, a subregion of the distance section 13)

[0142] Generally, an overload clutch 68 may be provided which allows—for example depending on the speed of the movable furniture part 2 or the position of the movable furniture part 2—to decouple the electric motor 7 from the rack 9; the double releasable connection of the rack 9 in the meshed state of the gear 17 of the electric drive 6 in its function as overload clutch 68 (releasable connection between the support device 10 and the rack 9 as well as the retraction device 8) makes it possible to dispense with incorporating an overload clutch 68. Generally, it may be sufficient if only the rack 9 is removably arranged on the support device 10, or if only the support device 10 is removably arranged on the retraction device 8.

[0143] Figure 15 shows an electric drive device 6 arranged on one side of the guide device 3, in this case a further trigger sensor 65 (schematically indicated by a dotted line) for activating the electric motor 7 for the closed position of the movable furniture part 2 arranged on the fixed furniture part 1 (to the closed position or beyond the closed position and possibly into an over-pushed position) is arranged in a fixed position on the second furniture board 64 via a cabinet rail 4 arranged on the second furniture board 64.

[0144] The further trigger sensor 65 preferably comprises a damping device 12 or a shock absorber. The further trigger sensor 65 may be data-connected to the electric drive 6 via a wireless or cable connection. The further trigger sensor 65 makes it possible to avoid processing of the furniture part front face 23. The further trigger sensor 65 is preferably grouped together with the trigger sensor 59.

[0145] The assembly comprises a stabilising device 70 for laterally stabilising the movable furniture part 2 along the guide device 3. Generally, sufficient lateral stabilisation can be provided via the movable furniture part 2 itself. It is conceivable to attach the stabilising device 70 to the second interface 35 (see Figure 7a).

[0146] The guide device 3 has two further racks 19 arranged on two cabinet rails 4, with a synchronizing rod 20 arranged between the two further racks 19 for lateral stabilization of the two further racks 19. The teeth of the further racks 19 are oriented upwards in a vertical direction 15 and extend perpendicular to the orientation of the teeth of the racks 9, although this is not necessarily required.

[0147] The synchronization rod 20 with both separate racks 19 may be provided as a separate structure as an add-on, and at least one of the three component elements may be attached to the second interface 35, the rack 9, the cabinet rail 4, or the electric drive 6.

[0148] There is a direct current connection (schematically shown by a dashed line) between both cabinet rails 4. The current lines 32 for the electric motors 7 can be guided through the cabinet rails 4 or the rack 9, for example for the energy supply of the ejection device 11.

[0149] On the left side of the drawing, it is shown diagrammatically that the rack 9 can have a coupling device 25, by means of which the rack 9 can be extended by a rack extension 26, in which case the rack 9 is then composed of at least two rack segments 28 in the longitudinal direction 27. This makes it possible to provide a rack 9 whose length is adjustable, the dimensions of which can be individually adapted to the dimensions of the guide device 3 or the pull-out distance along the distance section 13. It is generally also conceivable to configure the rack 9 in a telescopic manner.

[0150] 16 shows a graph on which the sensor angle (in degrees) is plotted on the vertical axis and the absolute distance (in mm) along the distance section 13 is plotted on the horizontal axis. Via both position sensors 53, 54, the position of the drawer rail 5 or of the movable furniture part 2 can be identified unambiguously along the distance section 13 by means of the relative rotational position.

[0151] In the graph, the sensor angle intersection corresponding to a pull-out length of approximately 245 mm is represented by a square, which corresponds to three full rotations of the first position sensor 53 and five full rotations of the second position sensor 54. The difference in rotation angle corresponds to 36°, which uniquely defines the position. Another sensor angle intersection corresponding to a pull-out distance of approximately 165 mm is represented by a circle, which corresponds to two full rotations of the first position sensor 53 and five full rotations of the second position sensor 54. The difference in rotation angle corresponds to 144°, which uniquely defines the position.

[0152] In this embodiment, for unambiguous position detection, the signal tolerance of the first position sensor 53 for a maximum of six revolutions is equal to 60°. Similarly, the signal tolerance of the second position sensor 54 for a maximum of ten revolutions is equal to 36°. In combination, the tolerance can be reduced to ±30° for the first position sensor 53 and ±18° for the second position sensor 54, which is sufficiently accurate for precise detection of absolute distance via both position sensors 53, 54. With a given gear ratio, redundancy of intersections for determining absolute distance may occur, possibly in the case of long distance sections 13. In this case, this undesirable situation can be eliminated by inputting data into the memory unit or changing the gear ratio. The use of additional sensor devices is also conceivable.

Claims

1. 1. An assembly comprising: - a fixed furniture part (1), in particular a furniture cabinet, a furniture part (2), in particular a drawer, that is movable relative to said fixed furniture part (1); - a guide device (3) for guiding the movable furniture part (2) relative to the fixed furniture part (1), in particular a drawer guide for a drawer, the guide device (3) comprising at least one cabinet rail (4) and at least one drawer rail (5) slidable relative to the at least one cabinet rail (4), - at least one electric drive (6) for at least partly automated movement of said movable furniture part (2) relative to said fixed furniture part (1), said electric drive (6) comprising in particular an electric motor (7) capable of supplying 230V; In an assembly comprising:

1. An assembly comprising at least one retraction device (8) for the movable furniture part (2) and at least one rack (9) operatively connected to the at least one electric drive (6), wherein the at least one retraction device (8) is preferably arranged directly on the at least one drawer rail (5), and the at least one rack (9) is preferably arranged indirectly on the at least one drawer rail (5), wherein the at least one rack (9) is removably arranged on at least one support device (10) and / or the at least one support device (10) is removably arranged on the at least one retraction device (8).

2. 2. The assembly according to claim 1, wherein the at least one support device (10), preferably exactly one support device (10), is arranged between the at least one rack (9) and the at least one retraction device (8), at least in a predetermined area.

3. 3. An assembly according to claim 1 or 2, wherein the at least one support device (10) and / or the at least one retraction device (8) comprise at least one ejection device (11) and / or at least one damping device (12), preferably mechanical.

4. 4. The assembly according to claim 1, wherein the at least one electric drive (6) is fixedly arranged on the at least one cabinet rail (4) and is permanently connected to the at least one rack (9) for the transmission of movement over the entire distance (13) for the movable furniture part (2) along the guide device (3), and the electric drive (6) preferably has a gear (17) which meshes with the at least one rack (9) and is particularly preferably oriented vertically (15) upwards or horizontally (16) towards the at least one drawer rail (5) in the use position (14) of the assembly.

5. 5. The assembly according to claim 1, wherein the at least one rack (9) is arranged, at least in a predetermined area, between the at least one electric drive (6) and the at least one drawer rail (5).

6. 6. The assembly according to claim 1, wherein the guide device (3) for moving the movable furniture part (2) has two drawer rails (5) arranged on two cabinet rails (4), and wherein exactly one electric drive (6) is arranged on one of the two cabinet rails (4) and / or exactly one rack (9) is arranged on one of the two drawer rails (5).

7. 7. The assembly according to claim 1, wherein the power supply of the at least one electric drive (6) or, if applicable, the power supply of a further current consumer is guided via the at least one cabinet rail (4) and / or via the at least one rack (9), preferably with a current connection between two cabinet rails (4) and / or two racks (9).

8. It is specified that the teeth (18) of the at least one rack (9) are oriented vertically (15) downwards or horizontally (16) away from the at least one drawer rail (5) in the use position (14) of the assembly, and preferably the at least one rack (9) is coupled to a gear (17) of the at least one electric drive (6); - the at least one rack (9) is supported so as to be pivotable or bendable about an imaginary axis in the direction of the at least one drawer rail (5), particularly preferably relative to the at least one support device (10), in the horizontal (16) and / or vertical (15) direction when the toothing (18) is oriented vertically, and thus so as to be only laterally and / or vertically movable, or - the at least one rack (9) is supported so as to be pivotable or bendable about an imaginary axis in the vertical direction (15) downwards and / or in the horizontal direction (16) when the toothing (18) is oriented horizontally, particularly preferably relative to the at least one support device (10), and thus so as to be vertically and / or laterally movable to a limited extent; 8. An assembly according to any one of claims 1 to 7.

9. 9. The assembly according to claim 1, wherein the guide device (3) has two cabinet rails (4) and two drawer rails (5) that are slidable relative to the cabinet rails (4), and wherein two further racks (19) are provided that are arranged on the two cabinet rails (4) and / or the two drawer rails (5), and a synchronization rod (20) is arranged between the two further racks (19) for lateral stabilization of the two further racks (19).

10. 10. The assembly according to claim 1, wherein the at least one drawer rail (5) and the at least one rack (9) are arranged with at least one support device (21) for the at least one rack (9), and the at least one electric drive (6), preferably a support (22) for coupling the at least one electric drive (6) to the at least one cabinet rail (4), can be passed by the at least one rack (9) and / or the at least one support device (21) at least in a predetermined area during a series of relative movements between the at least one drawer rail (5) and the at least one cabinet rail (4).

11. 11. The assembly according to claim 1, wherein the movable furniture part (2) comprises a furniture part front face (23) in the use position (14) of the assembly, and the at least one electric drive (6) is arranged on the at least one cabinet rail (4) in the region of a free end (24) of the cabinet rail (4) facing the furniture part front face (23), preferably substantially flush with the free end (24).

12. 12. The assembly according to any one of claims 1 to 11, wherein the at least one rack (9) comprises a coupling device (25) by means of which the at least one rack (9) can be extended by means of at least one rack extension (26), preferably wherein the at least one rack (9) is specified to be composed of at least two rack segments (28) in a longitudinal direction (27).

13. 13. The assembly according to claim 1, wherein the at least one drive (6) preferably comprises at least one freewheel clutch (29) capable of decoupling the movable furniture part (2) from the drive by the electric motor (7) along the distance section (13), preferably in the closing direction and / or in the opening direction, depending on the speed of the movable furniture part (2) and / or the position of the movable furniture part (2), and wherein the movable furniture part (2) is preferably movable decoupled from the drive by the at least one electric drive (6) between an open position (30) and a closed position, particularly preferably in the freewheel region, depending on the force applied to the movable furniture part (2), and / or is specified to be drivable by the at least one electric drive (6) over the distance section (13).

14. Assembly according to any one of claims 1 to 13, characterized in that at least one lighting means (31) is provided which is stationary, in particular relative to the fixed furniture part (1), and which is arranged on the at least one electric drive (6) and / or on a current line (32) of the at least one electric drive (6).

15. Assembly according to any one of claims 1 to 14, characterized in that at least one distance measuring device (33) is provided for detecting the position of the movable furniture part (2) relative to the fixed furniture part (1), and said position can be determined preferably unambiguously by means of said at least one distance measuring device (33) as an absolute distance traveled by the movable furniture part (2) relative to the fixed furniture part (1).

16. The guide device (3) comprises at least one cabinet rail (4) arranged on the fixed furniture part (1) and at least one drawer rail (5) arranged on the movable furniture part (2), the at least one drawer rail (5) having at least one first interface (34) suitable for fastening an ejection device (11) and / or the retraction device (8) to the at least one drawer rail (5), the at least one cabinet rail (4) having a follower (36) for the ejection device (11) and / or the retraction device (8).

16. The assembly according to claim 1, further comprising at least one second interface (35) suitable for fastening to the at least one cabinet rail (4), wherein the at least one electric drive (6) is arranged or can be arranged on the at least one second interface (35), and the at least one rack (9) for transmitting forces from the at least one electric drive (6) to the at least one drawer rail (5) is arranged or can be arranged on the at least one first interface (34).

17. 17. The assembly according to any one of claims 1 to 16, wherein the at least one electric drive (6) is arranged on the at least one cabinet rail (4) almost completely below the movable furniture part (2) in the use position (14) of the assembly.

18. 18. The assembly according to any one of claims 1 to 17, wherein the at least one electric drive (6) has a microcontroller (37) including a calculation unit and a memory unit that is data-connected or data-connectable to the calculation unit, and by means of the microcontroller (37) is able to determine a model of the movable furniture part (2) as a function of at least one static data set stored in the memory unit and / or to calculate a predicted movement trajectory of the movable furniture part (2) along the guiding device (3) as a function of at least one dynamic data set.

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