WO2023194079A1

WO2023194079A1 - Domestic applicance with lowerable door and cable pull device designed specifically for this purpose

Info

Publication number: WO2023194079A1
Application number: PCT/EP2023/057015
Authority: WO
Inventors: Michael Essert
Original assignee: BSH Hausgeräte GmbH
Priority date: 2022-04-07
Filing date: 2023-03-20
Publication date: 2023-10-12
Also published as: DE102022203507A1

Abstract

One aspect of the invention relates to a domestic appliance (1) comprising a housing (2) and comprising a door (4), which is arranged movably on the housing (2) and, when opened, can be lowered into a stowage space (5) in the housing (2), and comprising a door opening device (7) by means of which the door (4) is automatically movable, at least in some regions over its movement path, between two end positions, the door opening device (7) having a motor (14) and a cable pull device (15), the cable pull device (15) having two separate cables (18, 19), which are coupled at separate coupling points (23, 27) to the slide (16). When the first cable (18) is pulled, the slide (16) is movable to the rear in the depth direction (z) of the domestic appliance (1), and, when the second cable (19) is pulled, the slide (16) is movable to the front in the depth direction (z), the cable pull device (15) having a stabilising element (35), which is coupled to the slide (16) at two separate attachment points (23, 27), the movement of the slide (16) being stabilised by the stabilising element (35) when the first cable (18) or the second cable (19) is pulled.

Description

Household appliance with a retractable door and a specially designed cable pull device

One aspect of the invention relates to a household appliance with a housing. The household appliance also has a door which is movably arranged on the housing. When opened, the door can be retracted into a storage space of the household appliance, which is formed in the housing. The household appliance also has a door opening device with which the door can be automatically moved at least in some areas along its path of movement between two end positions. The door opening device has a motor and a cable pull device. The cable pull device can be operated automatically with the motor. The household appliance also has a carriage which is coupled to the cable pull device and which can be moved in the depth direction of the household appliance in the storage space by acting on the cable pull device.

Household appliances for preparing food are known from DE 102015 226 009 A1 and DE 102017207 980 A1. These are cooking devices. Retractable doors are provided there. Furthermore, the door opening devices there are equipped with cable pull devices. These cable pull devices can be used to operate specific components of the household appliance in order to automatically carry out the door movements. In exemplary embodiments, the cable pull devices can also be coupled to a motor in order to be able to effect the cable actuations using a motor.

In known cable pull devices that initiate the automatic movement of the door, several separate cables are also usually provided. These are operated accordingly by a motor. Since the ropes usually end at different points on different components, corresponding tensile forces are only exerted very locally. If larger components are to be set in motion by the cable coupling, uneven movements, in particular displacements, can result. It is the object of the present invention to create a household appliance in which automatic operation of a door is improved with a cable pull device.

This task is solved by a household appliance according to claim 1.

One aspect of the invention relates to a household appliance with a housing. The household appliance also has a door which is movably arranged on the housing. When opened, the door can be retracted into a storage space of the household appliance, which is formed in the housing. The household appliance also has a door opening device with which the door can be automatically moved at least in some areas along its path of movement between two end positions. The door opening device has a motor and a cable pull device. The cable pull device can be operated automatically with the motor. The household appliance also has, in particular, a carriage which is coupled in particular to the cable pull device and which can be moved in the depth direction of the household appliance in the storage space by acting on the cable pull device.

The cable pulling device has two separate cables which are coupled to the carriage at separate coupling points in the width direction of the household appliance. As a result, when pulling on the first rope, the carriage can be moved backwards in the depth direction of the household appliance and when pulling on the second rope, the carriage can be moved forward in the depth direction. The cable pull device also has a stabilizing element. This is coupled to the carriage at two separate connection points. The stabilizing element is an elongated element. It is many times longer than it is wide and high. In particular, the stabilizing element is elastically deformable. With the stabilizing element, the movement of the carriage is stabilized when it is pulled with the first rope or the second rope. Thanks to the specifically designed cable pull device, a pulling force can be exerted on the carriage using different cables as required at specific points, especially at coupling points. In order to prevent the carriage from tilting or tilting in particular, the additional stabilizing element is provided. Because even if a tensile force is exerted by pulling on a rope at a coupling point that is not central in the width direction but rather off-center, the carriage stays with it its longitudinal axis is oriented as best as possible in its perpendicular orientation to the pulling direction by the stabilization element. This means that with such off-center tightening at the first or second coupling point with the first rope or the second rope, the carriage can move as straight as possible in the depth direction. In this context, the stabilizing element makes it particularly advantageous to compensate for this off-center and therefore asymmetrically acting tensile force on the slide, so that undesirable tilting of the slide during movement in the depth direction can be avoided in this regard. The stabilizing element is a separate element from the first rope and the second rope.

In one exemplary embodiment, the movement of the carriage when pulled with the first cable is stabilized with the stabilizing element at a point opposite in the width direction to the first coupling point at which the first cable is coupled to the carriage. This means that the local position of the connection points, in particular in relation to the coupling points, advantageously ensures that, viewed in the width direction, when the first rope is pulled off-center at the first coupling point, it is at the point opposite the center in the width direction, in particular at the connection point opposite in this regard of the stabilization element, through which the stabilization element initiates a corresponding tensile force in the same direction, so that the carriage is kept as straight as possible when moving in the depth direction. In the same way, this is the case when the second rope is used to pull at the position of the second coupling point which is off-center in the width direction. Because even then, with the stabilizing element on the connection point opposite the center in the width direction to the second coupling point, a corresponding tensile effect is achieved by the stabilizing element with a tensile force in the same direction in the depth direction, as is achieved with the tensile force with the second rope on the carriage . The stabilizing element can therefore generate local forces on the carriage without explicitly pulling with the other first or second rope, which act at least proportionally in the same orientation in the depth direction as the tensile force with the first or second rope on which Sleigh is pulled. In one exemplary embodiment, the movement of the carriage when pulled with the second cable is stabilized with the stabilizing element at a point opposite in the width direction to the second coupling point at which the second cable is coupled to the carriage. The corresponding processes and advantages apply here, as already mentioned above for the advantageous exemplary embodiment.

In one embodiment, the stabilization element is coupled with a first end to the first coupling point. In one embodiment, the stabilization element is coupled with a second end to the second coupling point. These are further advantageous exemplary embodiments, because the connection of the stabilization element is direct and local to those areas to which this first rope and the second rope are also individually coupled. This means that the effective efficiency of the stabilizing element can be at least partially reproduced or carried out identically on the opposite side when the carriage is pulled off-center with the first rope or with the second rope. In addition, the two coupling points can also be used advantageously to also accommodate the two ends of the stabilization element. This means that there is no need to explicitly form separate connection points for the stabilization element that are different and separate from the two coupling points. This is in particular because the coupling points are arranged symmetrically to a center axis oriented in the depth direction.

In one embodiment, the stabilization element is elastic. This allows reversible deformability to be provided. The functionality of the stabilization element is then particularly high. In addition, it can be connected to the connection points in a variety of ways. The elastic deformability of the stabilizing element can in particular include curving or folding or bending. In addition or instead of this, this elastic deformability can also mean a reversible change in length. The stabilizing element can therefore also be reversibly lengthened or shortened in the direction of its longitudinal axis. This makes it possible to provide a particularly functional stabilizing element which brings about the above-mentioned advantages, in particular for stabilizing the movement of the carriage when a coupling point is attached off-center in the width direction and is pulled in the depth direction with one of the first two ropes. In one exemplary embodiment, the stabilizing element is a third cable of the cable pulling device. In particular, it is a third rope that is separate from the first rope and the second rope. With such a third rope, the advantages mentioned above can be achieved to a particular extent. In addition, such a rope is relatively light and space-saving.

In one embodiment, the stabilizing element is deflected between the ends with at least one roller, in particular two rollers, of the cable pull device. Such an embodiment is particularly advantageous. On the one hand, the stabilizing element can then be installed in tight spaces in such a way that it optimally develops its functionality. On the other hand, it is precisely through such a stabilizing element, in particular a multiply deflected stabilizing element, that the coupling with the carriage can be achieved particularly advantageously in such a way that the stabilization of the movement of the carriage when pulled with the first rope or the second rope is optimized. Because of this multiple redirection, the connection points can be selected according to needs. Because of the deflection concept, the pulling effect can be transferred to the stabilizing element and from one coupling point, when pulling with the first or second rope at this coupling point, can be particularly advantageous and uniform, in particular in a corresponding value as the tensile force of the first rope, can be transferred with the stabilization element to the opposite other connection point, in particular to the then other coupling point. This then applies in both directions with this redirected design. This means that regardless of whether only the first rope or only the second rope is pulled and the tensile force therefore acts on the corresponding coupling point, the stabilization element is also pulled in a defined manner at this coupling point and at the other connection point opposite A corresponding force immediately acts, which is transmitted particularly evenly and as required by the deflection and the movable rollers in this regard. A particularly efficient stabilization concept is achieved by this exemplary embodiment. A particularly uniform movement of the carriage is then possible. In one exemplary embodiment it is provided that two rollers of the cable pull device are arranged in opposite areas in the width direction and are arranged at the same depth in the depth direction.

Preferably, in one embodiment, a third roller and/or a fourth roller is arranged further back in the depth direction relative to the other two rollers.

In one exemplary embodiment, it can be provided that a roller for deflecting the stabilizing element is arranged in a front region of the storage space and the second roller is arranged in a rear region of the storage space. The rollers can be arranged on different sides in the width direction to a center axis oriented in the depth direction.

In particular, a roller, in particular a roller provided for deflecting the stabilizing element, of the cable pull device viewed in the depth direction of the household appliance, in particular in all possible positions of the coupling points, is arranged in front of the coupling points. In particular, the other roller, in particular a roller provided for deflecting the stabilizing element, of the cable pull device viewed in the depth direction of the household appliance, is arranged in particular in all possible positions of the coupling points in front of the coupling points. This enables a highly functional mechanism for transmitting the tensile force to the other coupling point. The transmission therefore takes place very evenly and simultaneously with the tightening at a coupling point with the first rope or the second rope.

Preferably, a roller of the cable pull device for deflecting the first cable in the depth direction of the household appliance is considered, in particular in all possible positions of the coupling points, is arranged behind the coupling points. In one exemplary embodiment, a roller of the cable pull device for deflecting the second cable in the depth direction of the household appliance, in particular in all possible positions of the coupling points, is arranged in front of the coupling points.

In one exemplary embodiment, the first rope and the second rope are connected to the common motor, whereby when the motor is rolled up first rope, with which pulling, in particular only in the depth direction, is effected at the first coupling point, at the same time a motor-induced unwinding of the second rope is effected. When the second rope is rolled up by a motor, which causes pulling, in particular only in the depth direction, at the second coupling point, the first rope is simultaneously rolled up by a motor. Such a counter-rotating rolling-unrolling concept enables a very uniform and low-spreading concept of the movement of the carriage in the depth direction.

In one embodiment, the first rope is wound on a first rope pulley. In one embodiment, the second rope is wound on a second rope pulley. In one embodiment, the two pulleys are coupled, in particular coaxially, to the motor shaft of the motor, so that when the motor shaft rotates, the two pulleys rotate simultaneously, in particular in the same direction. This makes it possible to advantageously simultaneously and evenly roll up one rope and unroll the other rope.

In one exemplary embodiment, the first cable is deflected between the first coupling point and the motor of the household appliance to which the first cable is coupled, with at least one roller of the cable pulling device. In one exemplary embodiment, the second cable is deflected between the second coupling point and the motor of the household appliance to which the second cable is coupled, with at least one roller of the cable pulling device.

It is also possible that preferably two rollers of the cable pull device, viewed in the width direction, are arranged at the same width positions as the coupling points and/or the connection points. One of the rollers can be used to deflect the stabilization element. The other pulley can be used to deflect the second rope.

In particular, in one exemplary embodiment, only two rollers are provided, by means of which the stabilizing element is deflected twice. A relevant roller can be arranged on a front region of the storage space in the depth direction and, viewed in the width direction, can be arranged at an outer, eccentric position. In one exemplary embodiment, a second roller can be arranged in a rear region of the storage space when viewed in the depth direction and viewed in the width direction, be arranged off-center and on the side opposite the first roller to the center axis. In particular, in one exemplary embodiment, the stabilizing element is laid in a Z shape by the two deflection rollers. These two roles are preferably arranged in a stationary manner. By appropriately moving the carriage, the stabilizing element is individually deformed in its Z shape by means of these preferably two existing rollers. This means that this Z shape changes depending on the respective movement control. This also enables a space-saving concept that transmits movement very directly.

In one exemplary embodiment, the first rope is deflected with a deflection pulley or pulley between its two ends. In particular, it is connected at one end to the motor of the door opening device. The other end is connected in a stationary manner to a first coupling point. In one embodiment it can be provided that the end of the first rope, which is connected to the coupling point, is resiliently mounted. This means that a spring element is preferably arranged at the attachment point of this further end of the first rope with the coupling point. This enables a certain elastic relative movement between this end of the first rope and the coupling point. Preferably, the first rope is laid in an L shape through the roller between the ends. A simple geometry is thereby achieved.

Preferably, the roller of the cable pull device, with which the first cable can be deflected, is arranged in the width direction at the same width position as the first coupling point, in particular arranged in a stationary manner. Viewed in the depth direction, this roller, with which the first rope is deflected, can be arranged in a rear area of the storage space. Preferably, when viewed in the depth direction, this roller can be arranged at the same or essentially the same depth as the motor, in particular a motor shaft of the motor.

In one exemplary embodiment, the second rope is deflected with a roller of the cable pulling device, in particular only one roller between the two ends. This roller, which deflects the second rope, can be arranged in a front area of the storage space when viewed in the depth direction. In one embodiment, one end of this second cable can be coupled to the motor, in particular the motor shaft. The opposite other end of this second rope is preferably coupled directly to the second coupling point. In this exemplary embodiment it can also be provided that this second end is resiliently mounted on the second coupling point. Here too, an elastic relative movement between the second end of the second rope and the coupling point can be achieved in the state of this second end arranged at the coupling point. The elastic relative movement in this regard can also take place in the direction of the longitudinal axis of the respective rope, as was already the case at the second end of the first rope.

The second rope is preferably laid in an L shape through the roller between the ends. A simple geometry is thereby achieved.

In one exemplary embodiment, two rollers of the cable pull device are arranged in front of the coupling points, viewed in the depth direction of the household appliance. This applies in particular to all possible positions of the coupling points. This means that the coupling points can be moved back and forth between two end positions when viewed in the depth direction. In all possible positions of these coupling positions, however, it is achieved that these two rollers are arranged in front of the coupling points in the depth direction. These two roles are particularly positioned in a stationary manner. This results in a particularly advantageous deflection principle which, on the one hand, can be carried out easily and, on the other hand, transmits the respective movements highly efficiently and directly. This avoids undesirable twisting of the ropes into one another or undesirable complex movement sequences of the ropes.

In one exemplary embodiment, a third roller is arranged behind the coupling points when viewed in the depth direction of the household appliance, in particular in all possible positions of the coupling points along the depth direction. In particular in one exemplary embodiment, this third roller is one of the two rollers with which the stabilizing element can preferably be deflected.

In particular, there is also a fourth role that runs in the depth direction of the

Household appliance considered, especially in all possible positions of the coupling points is arranged along the depth direction, behind the coupling points. This fourth roller can preferably be the roller with which the first rope is deflected.

In one exemplary embodiment, the preferably present four rollers for deflecting the at least two, in particular three ropes, are each arranged at an end point of a square.

In one embodiment, the first cable and the second cable are connected to the common motor. When the first rope is rolled up by a motor onto a rope pulley, this rolling up of the first rope causing a pull at the first coupling point in the depth direction to the rear, at the same time the second rope is rolled off by a motor from another rope pulley. When the second rope is rolled up by a motor onto the rope pulley, in which a second coupling point is pulled forward in the depth direction, the first rope is simultaneously rolled off by a motor from its first rope pulley. This achieves a highly efficient alternating rolling and unrolling of the two ropes in opposite directions, so that the movement guidance of the carriage is particularly advantageously supported. Here too, the uniform linear movement of the slide in the depth direction is favored both forwards and backwards. It is precisely because of this explained concept that it is particularly advantageous that, by means of a relatively simply constructed cable pull device, when one of the two cables is pulled, the carriage moves backwards in the depth direction and when the other cable is pulled, the carriage moves in an opposite straight line Depth direction forward is reached. By rolling up one rope very precisely and unrolling the other rope at the same time, tilting of the carriage during the respective movement guidance is also avoided.

In one embodiment, the first rope is wound on a first rope pulley. In one embodiment, the second rope is wound on a second rope pulley. In one exemplary embodiment, the two rope pulleys are in particular arranged coaxially to one another. In one exemplary embodiment, the respective longitudinal axes of the pulleys are coupled to the motor shaft of the motor, so that when the motor shaft rotates, the two pulleys rotate simultaneously, in particular in the same direction. Due to the However, if the two rope pulleys are wound in different directions on their respective rope pulleys, this simultaneous movement can still allow one rope from a rope pulley to be unrolled and the other rope to be rolled up from its rope pulley.

In one embodiment, the first rope is deflected between the first coupling point and the motor of the household appliance to which the first rope is coupled with at least one roller, in particular only one roller. In addition or instead of this, the second rope is deflected between the second coupling point and the motor of the household appliance to which the second rope is coupled with at least one roller, in particular only one roller. This means that a motor can be positioned very centrally and the two cables can still be guided to the motor and coupled there at the same time.

In one exemplary embodiment, the carriage has a traverse. This is an elongated piece. It can be formed as a flat component. This traverse extends with its longitudinal axis in the width direction. The carriage preferably has two coupling blocks. In one exemplary embodiment, these are arranged on the traverse, in particular directly on the traverse. They are arranged symmetrically on the traverse about a central axis. In particular, in one exemplary embodiment, these coupling blocks are arranged on an underside of the traverse. This means they can be positioned in a space-saving and protected manner. In particular, direct coupling of the respective ends of the ropes is achieved particularly advantageously. Due to the situation that the coupling blocks are preferably also covered from above with the traverse, undesirable slipping of the respective ropes out of the coupling points and thus out of the coupling blocks can be avoided. The coupling blocks form in particular the coupling points mentioned. Such coupling blocks can be used to provide more massive, especially cuboid bodies. This makes the direct connection of the respective ropes simple and mechanically more stable. On the other hand, it is then not necessary for the traverse itself to provide potentially complex and difficult direct couplings for the ropes. This means that the traverse can also be made simpler. Preferably, the coupling blocks can be connected to the separate traverse with detachable connections. For example, screw connections can be provided here. In one exemplary embodiment, the carriage has a traverse. This traverse is preferably guided with guide elements in two guide rails arranged on a floor of the storage space. These guide rails are preferably designed to be rectilinear and extend with their longitudinal axes in the depth direction. This further supports the straightest possible guidance of the carriage.

In one exemplary embodiment, the carriage is connected to a coupling rod of the door with a joint element, so that the joint element is rotatably arranged on the coupling rod. This provides a very simple mechanical operating principle for mechanically coupling the carriage with the coupling rod. In one embodiment, the coupling rod is in turn coupled to the door. This means that when the door is operated, the entire chain of action can be run through very easily and reliably in order to ensure that the door can be moved in or out of the storage space.

The rotatable mounting of the joint element on the coupling rod also makes it possible for the coupling rod not only to carry out a linear movement in the depth direction, but also, for example, to travel through an arcuate path. For this purpose, a corresponding guide track can be formed on the inside of the side boundary walls, which laterally delimit the storage space, into which the coupling rod engages with its opposite ends.

In one exemplary embodiment, the door can be automatically moved with this door opening device along its entire path of movement between two end positions. In particular, it can be moved fully automatically with the door opening device between the closed position and the fully open position of the door. In particular, in addition to or instead of this, it can also be moved fully automatically between the completely open position of the door and the closed position of the door.

Another aspect of the invention relates to a method for operating a door with a door opening device of the household appliance. The door opening device preferably has a cable pull device, as explained above. In particular, the couplings of the ropes and their operative connection already explained above the linear movement of the carriage in the depth direction of the household appliance is carried out forwards and backwards.

Advantageous embodiments of the household appliance are to be viewed as advantageous embodiments of the method. The relevant components of the household appliance, in particular the door opening device of the cable pull device, can carry out the respective process sequences when operating the door by appropriate coupling with the carriage.

The information “top”, “bottom”, “front”, “rear”, “horizontal”, “vertical”, “depth direction”, “width direction”, “height direction” refers to the intended use and positioning of the door and the household appliance given positions and orientations.

Further features of the invention emerge from the claims, the figures and the description of the figures. The features and feature combinations mentioned above in the description, as well as the features and feature combinations mentioned below in the description of the figures and/or shown in the figures alone, can be used not only in the combination specified in each case, but also in other combinations or on their own, without the frame of the invention. Embodiments that are not explicitly shown and explained in the figures, but which emerge from the explained embodiments and can be generated by separate combinations of features are therefore also to be regarded as included and disclosed by the invention. Versions and combinations of features are also to be regarded as disclosed, which therefore do not have all the features of an originally formulated independent claim.

Exemplary embodiments of the invention are explained in more detail below using schematic drawings. Show it:

1 shows a perspective view of an exemplary embodiment of a household appliance according to the invention; 2 shows a perspective view of partial components of the household appliance according to FIG. 1;

3 shows a perspective view of partial components of the arrangement according to FIG. 2 with specific elements of a door opening device; and

Fig. 4 is a top view of the arrangement according to Fig. 3.

In the figures, identical or functionally identical elements are provided with the same reference numerals.

In Fig. 1, a household appliance 1 is shown in a perspective, simplified representation. The household appliance 1 can be designed, for example, to prepare food. In particular, the household appliance 1 can be a cooking appliance. In this regard, the household appliance 1 can be an oven or steamer or a microwave oven. The household appliance 1 has a housing 2. At least one receiving space 3 is formed in the housing 2. The recording room 3 is intended here to accommodate food. The receiving space 3 can be, for example, a cooking space in a household appliance 1 designed, for example, as a cooking appliance. It is then limited in particular by a muffle of the household appliance 1. The household appliance 1 also has a door 4. This is movably arranged on the housing 2. It is intended here for closing the receiving space 3 at the front. In one exemplary embodiment, the household appliance 1 has a storage space 5. This is arranged below the receiving space 3 in the height direction (y direction) of the household appliance 1. The storage space 5 is also designed to be separate from the receiving space 3. The storage space 5 is intended to be able to move the door 4 into this storage space 5 when it is opened. This means that the door 4 is a folding door that can only be pivoted about a fixed pivot axis, particularly oriented in the width direction (x-direction) of the household appliance 1. Rather, this means that the door 4 is a retractable door. In the fully opened end position, it is then retracted into the storage space 5 by at least 70%, in particular at least 80%, in particular at least 90%. In one exemplary embodiment, the door 4 can have a handle 6.

In the household appliance 1 shown in the example, it is preferably provided that the door 4 can be moved in a motor-driven manner at least in some areas by a door opening device 7. The door opening device 7 is shown only symbolically in FIG. 1, so that neither its design nor its position should be understood as limiting in any way. In one exemplary embodiment, the door opening device 7 is designed to move the door 4 along its entire movement path from the closed end position to the fully open end position automatically and thus in particular in a motor-driven manner. In one exemplary embodiment, it is also possible for the entire movement path between the completely open end position of the door 4 and the completely closed end position of the door 4 to be carried out automatically by the door opening device 7 in addition to or instead of this.

In addition, however, in one exemplary embodiment it is also provided that the door 4 can alternatively be operated manually by a user. Thus, the household appliance 1 is intended in particular so that the door 4 can be operated either completely automatically or manually on at least a portion, but in particular also completely, by a user. The opening and closing process is then also carried out by the user's manual force, so that the opening and closing also takes place through this force.

In Fig. 2, an arrangement of partial components of an exemplary embodiment of a household appliance 1 is shown in a perspective view. The household appliance 1 has hinges 8 and 9. The door 4 can be pivoted using these hinges 8 and 9. In addition, the household appliance 1 has a base assembly 10. This floor assembly 10 also has the storage space 5 already mentioned. In one exemplary embodiment, the storage space 5 is limited at the bottom by a floor 11. This is part of the floor assembly 10. The storage space 5 can also be delimited on opposite sides by side walls 12 and 13. An exemplary embodiment of the door opening device 7 is also shown in FIG. A motor 14 of the door opening device 7 is shown. In one exemplary embodiment, the door opening device 7 has a cable pull device 15. This can be operated by means of the motor 14. A carriage 16 of the household appliance 1 can be moved with the cable pull device 15. In this context, ropes of the cable pull device 15 can be rolled up and unrolled by means of the motor 14, so that the carriage 16 coupled to the cable pull device 15 can be moved in particular in the depth direction (z direction) of the household appliance 1. This carriage 16 is coupled to the door 4, so that the door 4 is also moved depending on the movement of the carriage 16. If the carriage 16 moves backwards in the depth direction, the door 4 is opened, in particular pulled open, from its particularly closed end position. It is then pulled into the storage space 5 by the movement of the carriage 16. When the door 4 is closed, the carriage 16 is pulled forward from its rear position in the depth direction by means of the cable pull device 15, so that the door 4 is pushed out of the storage space 5 and through the hinges 8 and 9 as the carriage is pushed further forward 16 is folded upwards so that the closed end position is then reached. The carriage 16 has a traverse 17.

3 shows a perspective view of an exemplary embodiment of a door opening device 7. The engine 14 is shown here. In addition, the cable pull device 15 is shown. The cable pull device 15 has a first cable 18. In addition, the cable pull device 15 has a separate second cable 19. The first rope 18 is connected to the motor 14 at a first end. In particular, it is provided in the exemplary embodiment that a rope pulley 20 is provided, on which the first rope 18 is rolled up starting from the first end. In one exemplary embodiment, the second rope 19 is rolled up on a separate rope pulley 21. The two pulleys 20 and 21 are arranged coaxially in one exemplary embodiment. They are in particular arranged coaxially with a motor shaft 22 of the motor 14. In the exemplary embodiment, the first rope 18 is connected to this rope pulley 20 at a first end. This first rope 18 is directly connected to a first coupling point 23 with an opposite second end 18a. The first coupling point 23 can be formed by a coupling block 24 in the exemplary embodiment. Laying channels are preferably formed in this coupling block 24, in which the first rope 18 is laid embedded with this second end 18a. It can be provided that a spring is also arranged in such a laying channel 25, so that the second end 18a is resiliently mounted in the direction of the longitudinal axis of the first rope 18. As can be seen, a roller 26 of the cable pull device 15 is provided in the exemplary embodiment. The first rope 18 is deflected with this roller 26. In the exemplary embodiment, this role 26 is arranged in a rear area of the storage space 5. An asymmetrical and eccentric position of this roller 26 is formed in relation to a central axis oriented in the depth direction.

The second rope 19 is connected at a first end to the already mentioned rope pulley 21. At the opposite second end 19a, this second rope is connected to a second coupling point 27. This second coupling point 27 can be a coupling block 28 in one exemplary embodiment. As can be seen, this coupling block 28 also has at least one laying channel 29. This second end 19a of the second rope 19 is arranged embedded in this laying channel 29. In one exemplary embodiment, a spring element can also be arranged in this laying channel 29. As a result, this second rope 19 can also be mechanically coupled to the coupling block 28 in an elastically resilient manner, in particular with the second end 19a in the direction of its longitudinal axis.

As can be seen, this second cable 19 is deflected with a further roller 30 of the cable pulling device 15. In particular, it is only deflected with this one roller 30. This further role 30 is arranged in a front area of the storage space 5 when viewed in the depth direction. Viewed in the width direction, it is positioned relative to the center axis on a side opposite the roller 26.

As can be seen, the two coupling points 23 and 27, in particular the coupling blocks 24 and 28, are arranged symmetrically opposite one another in the width direction with respect to a center axis. They are arranged, in particular screwed, on an underside 17a of the traverse 17. As can be seen, the household appliance 1 also has guide rails 31 and 32 in one exemplary embodiment. These guide rails 31 and 32 are rectilinear and extend with their longitudinal axes in the depth direction. In one exemplary embodiment, the carriage 16 with the traverse 17 is also guided backwards and forwards in the linear movement in the depth direction by these guide rails 31 and 32. For this purpose, the traverse 17 with arranged guide elements 33 and 34 engages in the guide rails 31 and 32 a. As can be seen, the two coupling blocks 24 and 28 are each positioned on the inside and immediately adjacent to the guide rails 31 and 32 when viewed in the width direction.

In one exemplary embodiment, the cable pull device 15 also has a stabilizing element 35. The stabilizing element 35 is in particular a component of the cable pulling device 15 that is separate from the cables 18 and 19. In one exemplary embodiment, the stabilizing element 35 is elastically deformable. In one exemplary embodiment, it can preferably be a third rope. This stabilizing element 35 is coupled to the carriage 16 with a first end 35a with a connection point. In particular, in one exemplary embodiment, this connection point is the same as the coupling point 23. In particular, this end 35a of the stabilizing element 35 is also arranged embedded in a laying channel in the first coupling block 24.

The stabilizing element 35 also has a second end 35b opposite the first end 35a. This is coupled to the carriage 16 with a second connection point. In one exemplary embodiment, this second connection point can be the second coupling point 27. In particular, this second end 35b can be laid in a further laying channel in the second coupling block 28.

Generally speaking, the stabilizing element 35 is an elongated component with, in particular, only two ends 35a and 35b.

In one exemplary embodiment, the stabilizing element 35 is deflected with a roller 36. This roller 36 deflects the stabilizing element 35, in particular this third rope, to the first coupling point 23. In one exemplary embodiment it is provided that the stabilizing element 35 is deflected again with a further roller 37. With this further role 37, the stabilizing element 35 is deflected towards the second coupling point 27. In particular, this stabilizing element 35 is deflected with only these two rollers 36 and 37. The two rollers 36 and 37 are arranged opposite each other in the exemplary embodiment. This means that the roller 36, viewed in the depth direction, is arranged in a front region of the storage space 5 and the further roller 37 is arranged in the depth direction in a rear region of the storage space 5 is arranged. In addition, these two rollers 36 and 37, which are in particular only provided for deflecting the stabilizing element 35, are arranged in the width direction on opposite sides to a center axis oriented in the depth direction.

In one exemplary embodiment, four separate rollers 26, 30, 36 and 37 are preferably provided. These are each intended to deflect the different ropes of the cable pull device 15. In one exemplary embodiment, the four rollers 26, 30, 36 and 37 are arranged at four corner points of a fictitious square.

Starting from the arrangement shown in FIG. 3, the operating principle will be explained below. In the situation shown in FIG. 3, the carriage 16 is arranged in its frontmost basic position when viewed in the depth direction. In this the door 4 is arranged in the closed end position. The carriage 16 is connected to a joint element 38 and a further joint element 39 to a coupling rod, not shown here, of the household appliance 1. The coupling rod is in turn connected to the door 4 with a door connection.

If it is now desired to open the door 4 and in particular this should be done fully automatically, this can be effected by the door opening device 7. The door opening device 7 is started, for example, by a voice signal or a gesture or by activating a control element. The motor is activated. Rotating the motor shaft 22 also causes the pulley 20 to rotate. For this purpose, the rope 18 is then rolled up onto the rope pulley 20. This means that a tensile force in the depth direction towards the rear is generated on the first coupling point 23.

At the same time, this motor drive causes the second rope pulley 21 to also be rotated in the same direction as the rope pulley 20. Due to the winding direction, however, the second rope 19 is unrolled from the rope pulley 21. This allows the second coupling point 27 to be moved backwards in the depth direction.

These opposing movements, on the one hand the rolling up of the first rope 18 and on the other hand the simultaneous unrolling of the second rope 19, cause the carriage 16 to move backwards in the depth direction. This sliding movement towards the rear is stabilized by the stabilizing element 35. Through that accordingly Designed stabilizing element 35 is then pulled backwards in the depth direction by deflecting around the deflection rollers 36 and 37. At the same time, however, this also causes this tensile force to be transferred to the second end 35b of the stabilizing element 35. Due to the specific deflection and coupling of the stabilizing element 35, a tensile force is then also applied to this second coupling point 27 by the stabilizing element 35 in the depth direction to the rear effects.

The same principle of action occurs when the door 4 is closed again starting from the open position, in particular the fully open end position. This can also be done fully automatically with the door opening device 7. If the carriage 16 is then at its rear end position, viewed in the depth direction, the second rope 19 is then rolled up or wound onto the rope pulley 21 by the motor 14. This creates a pulling force forward in the depth direction at the second coupling point 27. Since at the same time as this rolling of the second rope 19 onto the rope pulley 21, the first rope 18 unrolls from the rope pulley 20, the movement of the second coupling point 23 forward in the depth direction is also made possible. In this movement process, too, the stabilizing element 35 serves to stabilize the movement of the carriage 16. This movement process also ensures that the tensile force in the depth direction forward on the stabilization element 35 at the second coupling point 27 also causes a tightening at the first end 35a of the stabilizing element 35 is effected forward in the depth direction. As a result, the first coupling point 23 is then pulled forward in the depth direction by the stabilizing element 35.

The specific deflection of the stabilizing element 35 with different orientations of the ends in the depth direction causes this simple yet highly functional transmission concept.

In Fig. 4 the arrangement according to Fig. 3 is shown in a top view. The positions of the mentioned rollers 26, 30, 36 and 37 as well as the coupling points 23 and 27 as well as the courses of the ropes 18 and 19 and the stabilizing element 35 can be seen. Preferably present joint elements 38 and 39 are also shown in FIGS. 3 and 4. These are connected to the traverse 17 and to a schematically shown coupling rod 41 (FIG. 3). The coupling rod 41 is guided at the end in guide tracks 40 (FIG. 1) of the side walls 12 and 13.

Reference symbol list

1 household appliance

2 housings

3 recording room

4 door

5 storage space

6 handle

7 door opening device

8 hinge

9 hinge

10 floor assembly

11 floor

12 side wall

13 side wall

14 engine

15 cable pull device

16 sledges

17 traverse

18 first rope

18a second end

19 second rope

19a second end

20 pulley

21 pulley

22 motor shaft

23 first coupling point

24 coupling block

25 laying channel

26 roll

27 second coupling point 28 coupling block

29 laying channel

30 roll

31 guide rail

32 guide rail

33 leadership element

34 guide element

35 stabilization element

35a first end

35b second end

36 role

37 role

38 joint element

39 joint element

40 guideway

41 Coupling rod x width direction y height direction

Depth direction

Claims

Claims Household appliance (1) with a housing (2) and with a door (4), which is movably arranged on the housing (2) and can be retracted into a storage space (5) in the housing (2) when opened, and with a door opening device (7) with which the door (4) can be automatically moved at least partially along its path of movement between two end positions, the door opening device (7) having a motor (14) and a cable pull device (15) which can be actuated by the motor (14). , wherein the household appliance (1) has a carriage (16) which is coupled to the cable pull device (15) and which can be moved in the depth direction (z) of the household appliance (1) in the storage space (5) with the cable pull device (15), thereby characterized in that the cable pulling device (15) has two separate cables (18, 19) which are coupled to the carriage (16) at separate coupling points (23, 27) in the width direction (x) of the household appliance (1), whereby when pulling on the first rope (18), the carriage (16) can be moved backwards in the depth direction (z) of the household appliance (1), and when the second rope (19) is pulled, the carriage (16) can be moved forwards in the depth direction (z). can be moved, the cable pull device (15) having a stabilizing element (35) which is coupled to the carriage (16) at two separate connection points (23, 27), the movement of the carriage (16) being carried out with the stabilization element (35). each pulling is stabilized with the first rope (18) or the second rope (19). Household appliance (1) according to claim 1, characterized in that with the stabilizing element (35) the movement of the carriage (16) when pulling with the first rope (18) at a width direction (x) to the first coupling point (23), at which the first cable (18) is coupled to the carriage (16), is stabilized at the opposite point, and with the stabilizing element (35) the movement of the carriage (16) when pulled with the second cable (19) at a width direction (x) is stabilized at the point opposite to the second coupling point (27), at which the second rope (19) is coupled to the carriage (16). 3. Household appliance (1) according to claim 1 or 2, characterized in that the stabilizing element (35) is coupled with a first end (35a) to the first coupling point (23) as a connection point and with a second end (35b) to the second Coupling point (27) is coupled as a connection point.

4. Household appliance (1) according to one of the preceding claims, characterized in that the stabilizing element (35) is a third rope.

5. Household appliance (1) according to claim 4, characterized in that the stabilizing element (35) is deflected between the ends (35a, 35b) with at least one roller (36, 37), in particular at least two rollers (36, 37).

6. Household appliance (1) according to claim 5, characterized in that a roller (36, 37) viewed in the depth direction (z) of the household appliance (1), in particular in all possible positions of the coupling points (23, 27) in front of the coupling points (23 , 27) is arranged, and the other roller (36, 37) viewed in the depth direction (z) of the household appliance (1), in particular in all possible positions of the coupling points (23, 27) is arranged in front of the coupling points (23, 27).

7. Household appliance (1) according to one of the preceding claims, characterized in that a roller (26) of the cable pull device (15) for deflecting the first rope (18) in the depth direction (z) of the household appliance (1) is considered, in particular in all possible ways Positions of the coupling points (23, 27), is arranged behind the coupling points (23, 27), and / or a roller (36) of the cable pull device (15) for deflecting the second cable (19) in the depth direction (z) of the household appliance (1 ), in particular in all possible positions of the coupling points (23, 27), is arranged in front of the coupling points (23, 27).

8. Household appliance (1) according to one of the preceding claims, characterized in that the first rope (18) and the second rope (19) are connected to the common motor (14), with the first rope (18 ), with which a pulling on the first coupling point (23) is caused, at the same time a motor-driven unwinding of the second rope (19) is caused, and with a motor-driven rolling up of the second rope (19), with which causes a pulling on the second coupling point (27), and at the same time a motor-driven unwinding of the first rope (18) is caused. Household appliance (1) according to claim 8, characterized in that the first rope (18) is wound on a first rope pulley (20) and the second rope (19) is wound on a second rope pulley (21), the two rope pulleys (20 , 21), in particular coaxially, are coupled to the motor shaft (22) of the motor (14), so that when the motor shaft (22) rotates, the two pulleys (20, 21) rotate simultaneously, in particular in the same direction. Household appliance (1) according to one of the preceding claims, characterized in that the first cable (18) between the first coupling point (23) and the motor (14) of the household appliance (1), to which the first cable (18) is coupled, is deflected with at least one roller (26), and/or the second rope (19) between the second coupling point (27) and the motor (14) of the household appliance (1), to which the second rope (19) is coupled at least one roller (30) is deflected. Household appliance (1) according to one of the preceding claims, characterized in that the carriage (16) has a traverse (17) on which two coupling blocks (24, 28) are arranged, in particular on an underside (17a) of the traverse (17) are arranged, the coupling blocks (24, 28) forming the coupling points (23, 27). Household appliance (1) according to one of the preceding claims, characterized in that the carriage (16) has a cross member (17) which is connected to guide elements (33, 34) in two guide rails (31, 32) arranged on a bottom of the storage space (5). ) is guided. Household appliance (1) according to one of the preceding claims, characterized in that the carriage (16) is connected to the door (4) with a joint element (38, 39) with a coupling rod (41), so that the joint element (38, 39 ) is rotatably arranged on the coupling rod (41).

14. Household appliance (1) according to claim 13, characterized in that the

Storage space (5) is delimited by side walls (12, 13), guide tracks (40) being formed in the side walls (12, 13), into which the coupling rod (41) engages and in the guide tracks when the carriage (16) moves (40) is guided.

15. Household appliance (1) according to one of the preceding claims, characterized in that the door (4) with the door opening device (7) can be moved automatically over its entire path of movement between two end positions, in particular fully automatically between the closed position of the completely opened door (4 ) and can be moved fully automatically between the fully open position and the closed position.