EP3390917A2

EP3390917A2 - Cooking appliance comprising a door opening mechanism for automatically moving a door into an intermediate position, and method for opening a door of a cooking appliance

Info

Publication number: EP3390917A2
Application number: EP16797937.6A
Authority: EP
Inventors: Tobias Schmidt; Ralf Grobleben; Thomas Rembold
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2015-12-18
Filing date: 2016-11-18
Publication date: 2018-10-24
Anticipated expiration: 2036-11-18
Also published as: WO2017102244A2; US20180328593A1; US20190271474A1; WO2017102244A3; DE102015226009A1; EP3390917B1; US10408465B2; PL3390917T3; US10948195B2; CN108369013B; CN108369013A

Abstract

The invention relates to a cooking appliance (1) comprising a door (3) for closing a cooking chamber, said door (3) being lowerable into a stowage compartment (14) in a housing (2) of the cooking appliance (1) that further comprises a door opening mechanism (26) for automatically moving the door (3) at least in some sections of an entire movement path extending between a closed position and an open position of the door (3); the door opening mechanism (26) includes an actuation unit (31) by means of which the door (3) can be automatically tilted from the closed position into an intermediate position which is characterized in that the further movement of the door (3) from the intermediate position into the open position, in which the door (3) is retracted in the stowage compartment (14), is performed automatically under the force of gravity of the door (3). The invention also relates to a method for opening a door (3) of the cooking appliance (1).

Description

Cooking appliance with a door opening device for automatically bringing a door into an intermediate position and method for opening a door of a cooking appliance

The invention relates to a cooking appliance with a door for closing a cooking chamber of the cooking appliance. The door can be lowered into a storage space in a housing of the cooking appliance. The cooking appliance further comprises a door opening device for automatically moving the door at least in regions over an entire movement path dimensioned between a closed position and an open position of the door. Furthermore, the invention also relates to a method for opening such a door of a cooking appliance.

When cooking appliances, it is known that the operation of the door and thus a

Position change manually by a user can be provided by the user directly engages the door in particular on a handle and causes the door to open by a pulling force. It is provided in these embodiments that the door over its entire movement path quasi by the user himself in the respective

Positions is spent.

In the context, it is also known that such a door can not only be pivoted about a fixed axis relative to the housing, but that the housing of the cooking appliance and this storage space is formed, in which then the door can be inserted. In such embodiments with a storage space, the path of movement of the door is relatively complex. Also the required hinges and the corresponding

Moving the door into the storage space is more complex. Because such a door of a cooking appliance due to thermal requirements and

Stability requirements also has a relatively large weight, here is the

To design motion control so that no undesirable hard impact occurs. In order to increase the user-friendliness, it is also known that such a door can be moved by an electric drive independently of the user guidance and thus the manual direct movement of the door by a user. Such a configuration is known for example from DE 199 06 913 A1. There, the entire path of movement is performed via an electric drive until the door is completely recessed in the storage space. In this embodiment, however, the electric drive is correspondingly large and high in terms of its electrical performance. For just with a relatively heavy door occur in the movement of forces that must be taken by the electric drive then practically, to be able to perform the movement over this entire path on this drive.

Such large-sized electric drives require a lot of space, a lot of energy and are therefore also very expensive.

It is an object of the present invention to provide a cooking appliance and a method for opening a door of such a cooking appliance, in which the movement of the door into the storage space is improved with at least partially automatic movement control of the door.

This object is achieved by a cooking appliance and a method according to the independent claims.

An inventive cooking appliance comprises a door for closing a cooking chamber of the cooking appliance. The cooking appliance further includes a housing in which a

Storage space is formed, in which the door is retractable when opening. The cooking appliance further comprises a door opening device for automatically moving the door and thus a user-independent movement of the door. The

Door opening device is at least partially over an entire dimensioned between a closed position and an open position of the door

Movement path formed for this automatic movement of the door. An essential idea of the invention lies in the fact that this door opening device has an actuating unit, with which the door, starting from the closed

Position automatically only tilted to an intermediate position. The intermediate position is characterized in that the further movement of the door from the intermediate position in the retracted into the storage compartment open position also automatically, but without Supporting the operating unit and thus only by the gravity of the door itself. In this embodiment, therefore, the movement of the door from the closed position to the open position is in particular completely automatic. This means that this movement of the door takes place without directly engaging the door and thus without generating a pulling force of a user on the door. A user-independent movement of the door is therefore given. In the invention, however, only over a whole

specific partial path of the entire movement path between the closed position and the open position via a drive motor of the actuating unit initiates the motion control. This is done in this regard in the concrete

Movement path section between the closed position and the intermediate position. Through this relatively short way then the door is tilted very targeted by the actuator. From the intermediate position, the actuating unit with respect to a further motor-driven moving the door is then no longer effective

or is disabled in this regard. As a matter of fact up to this

Characterized intermediate position, a motorized motion support via the actuator unit, this movement can be continuously run through, so that in this respect the opening of the door can take place up to this intermediate position and jerk-free and jam-free. Particularly advantageous is then achieved by this intermediate position, a position at which then by the weight of the door

Gravity caused further movement of the door from the intermediate position to the open position occurs.

By such a configuration, the actuating unit can be designed small especially with their motor drive. As a result, space can be saved and the actuator unit must not be designed so strong in terms of their motor effect, just to be able to absorb the forces occurring at larger tilt positions of the door can. As a result, lower requirements for the

Actuator given, so that a more energy-efficient operation of this motor drive concept is achieved. Advantageously, it is provided that the entire movement sequence of the door is started in particular from the closed position to the open position by a user actuates an operating element of the cooking appliance, wherein this automatic opening operation takes place depending on this operation. The control element can be realized in a variety of configurations. It can be a touch-sensitive

Be control. However, it may also be a push button or a toggle switch or the like. Likewise, for example, the control element can also be designed to detect a gesture and thus be operable without contact. It can also be provided that the operating element is designed for speech recognition and a corresponding voice command is given by a user to this

to initiate automatic opening process.

In particular, it is provided that the intermediate position at a tilt angle between 15 ° and 30 °, in particular between 18 ° and 22 °, in particular at 20 °, to

closed position of the door is reached. In particular, the closed position of the door is the one in which the door is oriented vertically. Due to the relatively small angular interval starting from the closed position is the motor

Drive power significantly reduced via the actuator unit. Nevertheless, a position is reached at which the weight of the door, the further movement, starting from the intermediate position toward the open position acts or initiates further autonomous movement.

It is preferably provided that the actuating unit has an electromechanical device which is connected to at least one cable with a drag lever. This drag lever is in particular connected to a hinge arm of a hinge. With the hinge is the pivoting and retracting the door in the

Storage space allows. The drag lever is mechanically coupled to this hinge arm, which is pivotable about a pivot axis by a force acting on the drag lever pulling force of the drag lever and depending on this pivotal movement of the hinge arm is pivotable so that the door automatically tilted from the closed position to the intermediate position is. Such a specific embodiment of the actuating unit on the one hand enables a robust design, so that corresponding movements and power transmissions can be reliably and permanently made possible. In addition, the motion control and the initiation of movement are very precisely possible here. Undesired tolerances in the movement of the door are thereby avoided. Also, it is avoided by this design that unwanted at the respective coupling points

Tolerances can occur, which could then add up. The Actuating unit also includes a motor drive or a motor with which the movement of the cable is achieved in the context of the electromechanical device. This refinement then also makes it possible in particular for the motor to be arranged remote from the hinge arm and also from the drag lever. As a result, space-specific improvements can be achieved. Especially at the points where then the hinge is arranged, the design is free of large components of the operating unit. This allows the entire

Guide device of the door are maintained unchanged and is not subject to any structural restrictions. Moreover, it is then also possible that the motor of the electromechanical device can be arranged in a location which also has no adverse effects on the function of this motor with respect to thermal loads on the cooking appliance during operation.

In particular, it is provided that the hinge has a hinge housing with which the hinge arm is rotatably connected and the drag lever is pivotally mounted on the hinge housing. In particular, the door is directly with the

Hinged arm connected. By then the drag lever is directly coupled to the hinge housing, correspondingly occurring forces can also be transmitted improved here, since the hinge housing is also a more robust and larger component than the hinge arm. In addition, in turn, the connection concept between the hinge arm and the door is not affected by this specific coupling point and the corresponding relative movements when moving the door between the door and the hinge arm are not affected. In particular, the drag lever is also pivotally mounted to the hinge arm. In particular, it is provided that the hinge arm is a one-piece bracket, which preferably has a U-shape. On the hinge arm, in particular on one leg of this U-shape two spaced-apart rollers are arranged, which are rotatable. With these rollers, the hinge arm engages

Guideways formed on the narrow vertical side edges of the door. This is a mechanically stable leadership, but still jerk-free

Relative movement possibility between the hinge arm and the door given. This has particular advantages when moving the door into the storage space and the trajectories occurring between the door and the hinge arm. It is advantageously provided that guideways are formed on the housing on lateral walls which delimit the stowage space, in each of which a guide carriage is guided. The trained on opposite sides

Guide carriages are preferably connected to a connecting rod so that the position can be maintained relative to one another and no tilting or twisting occurs relative to the movement. By this position coupling between the guide carriage a jerk-free and uniform movement along the guideways in the storage space on opposite sides bounding walls is made possible. The door is advantageously connected at its lower end with this guide carriage, in particular rotatably connected thereto. The

Guide carriages are separate components to the hinge arms. The guide slides are fixed and thus not slidably attached to the door, wherein at the

Connection point is formed an axis of rotation about which then the door can rotate relative to a guide carriage. In contrast, not only a relative movement with respect to a rotation allows each other by the hinge arms with the above-mentioned roles, but also given by the also formed on the side edges and already mentioned guide groove or guideways in the door a sliding movement between the door and a hinge arm.

In particular, it is provided that the electromechanical device as already mentioned has a motor drive. The electromechanical device further comprises a rotatable by the motor drive lifting wheel and a lifting rod connected to the lifting. The lifting rod is linearly movable by a rotation of the Hubrads, in particular in the vertical direction upwards and downwards slidably. Depending on this movement of the lifting rod, the cable coupled to the lifting rod can be actuated. These specific components of

electromechanical device as well as their operative connection in turn also allow a finely adjusted and precise motion transmission to the cable and from this in turn to the drag lever. This can be very dosed and fine-tuned the

Movement of the rocker arm take place, which in turn has a corresponding effect on a correspondingly metered movement of the door. A sudden opening of the door or a related Nachfedern or back and forth shaking the door is avoided.

Just by the lifting wheel and the lifting rod and the force generated by the motor drive is then transmitted continuously and smoothly.

In particular, a cable lever is connected to the lifting rod, to which the at least one cable is attached. By the movement of the lifting rod of the movable cable lever is actuated and thus exerted a corresponding tensile force on the cable. Preferably, it is provided that the door is brought from the closed position to the intermediate position by an entire revolution of the Hubrads by 360 ° through the chain of action between the Hubrad and the hinge arm. In particular, this is a single complete revolution of the Hubrads the rocker arm automatically returned to its original position. Just by this specific rotational movement to a single complete revolution of the Hubrads on the one hand, the required maximum travel of the finger lever starting from its starting position or

Basic position in a rotational position, in which then the hinge arm is moved so that the door is in the intermediate position, reached, on the other hand, then also ensures that the drag lever is automatically returned from its pivoted in this maximum position then back to this basic position. By this respect even rotation of the Hubrads very uniform movements are transmitted to the drag lever here, which then again very evenly from the basic position away in the maximum deflection position and can move from this maximum deflection position back to the normal position. It is thus always automatically reached the starting position by such a complete revolution at the stroke in a single actuation movement.

In particular, it is provided that the hinge housing has a main spring with a first spring hardness, wherein the main spring is coupled with an additional spring having a second spring hardness smaller the first spring hardness. The hinge housing of this hinge is on the path of movement between the closed position of the door and the intermediate position of the door relative to a fixed connection point of the Additional spring movable. The hinge is designed for pivoting and retracting the door into the storage space. This design of the auxiliary spring and the main spring can be very specific spring forces to different sections of the

Generate movement path of the door. As a result, on the one hand the Bewegungswegabschnitt between the closed position and the intermediate position, on the other hand, the Bewegungswegabschnitt between the intermediate position and the open position individually and advantageously supported. In a particularly advantageous manner, this configuration then also achieves that, in particular, on the first

Movement path section between the closed position and the intermediate position, the main spring is inactive and thus does not yet act with a spring force, on the other hand advantageously the main spring in a particular extent on the second

Movement path section between the intermediate position and the open position of the door acts. This is advantageously just on the second

Moving path section, in which the further downwards tilting of the door by the gravity of the door itself is conditional, carried out so that the door does not unbraked tilts down and thus an undesirably hard impact occurs, but that this counteracting spring force of the main spring, these only

Gravity initiated tilting movement of the door down dosed and cushioned takes place. By this configuration, a particularly advantageous embodiment of the entire motion control is thus achieved. In particular, when the main spring with its spring force on the first Bewegungswegabschnitt does not work, no

undesirable complication of this motor drive the door from the closed position reached in the intermediate position. The motor drive thus counteracts no spring force of the main spring. Advantageously, it is provided that the main spring is connected to the auxiliary spring via a coupling rod. Through this direct connection is also a direct

Given interaction between the two springs. Power transmissions can be done very directly and unadulterated. In particular, the coupling rod is rigid in itself, whereby these advantages mentioned above can be achieved even better.

It is preferably provided that the main spring and the additional spring, in particular via a coupling rod, are connected so that on the Bewegungswegabschnitt between the closed position of the door and the intermediate position of the door, the additional spring is compressible and the main spring is uncompressed. The above-mentioned advantages in this regard can be achieved here in particular. It is thereby made possible that movements of the hinge housing are sprung and dampened by the auxiliary spring to some extent, so even here in

Favorable way, the movement is damped by the closed position of the door in the intermediate position to some extent. Due to the relative relatively small spring stiffness of the additional spring, however, no undesirably high force acts against the motor drive of the electromechanical device. Since the two spring hardness of the main spring and the auxiliary spring are chosen individually and the first spring of the main spring is just greater than the second spring rate of the auxiliary spring, the main spring remains virtually unchanged in this path between the closed position and the intermediate position of the door and compressed or expanded not here.

It is preferably provided that a longitudinal axis of the main spring is arranged parallel or in a straight line extension to a longitudinal axis of the additional spring. The above-explained interaction between the additional spring and the main spring with respect to their respective change in length in very specific Bewegungswegabschnitten is thereby further improved and specified. This arrangement is also a

Avoid bending a spring out of the respective rectilinear orientation and thus avoid unwanted distortion of the entire movement. A deflection of a spring to the side is prevented as well. It is preferably provided that the additional spring is arranged in a spring pot, which is positioned stationary. As a result, the additional spring is arranged protected to some extent and bending to the side is even better prevented. In addition, the additional spring is guided in terms of their compression and expansion by the spring cup. In addition, this spring pot then forms a robust mechanical stop for the main spring, if this then rests on reaching the intermediate position of the spring cup with the hinge housing and then the expansion of the main spring takes place on further movement on the second movement path section of the door. In particular, it is provided that the hinge housing is arranged in the closed position of the door spaced from the spring cup and with the achievement of the

Intermediate position the hinge housing is arranged adjacent to the spring cup. When moving the door between the closed position and the intermediate position, the hinge housing is thus then moved relative to the additional spring and thus to the spring cup and thus moved towards the spring cup, in particular moved rectilinearly in this regard. With the achievement of the intermediate position, the spring cup thus forms a stop for the hinge housing and the main spring arranged therein. Thus, the hinge housing is then held positionally secure for the further movement of the door towards the open position, so that the basic position of the main spring as such does not change on this further movement of the door towards the open position as the entire spring, but only the main spring is expanded, whereby the desired spring force is applied to the retention of the door from an undesirably hard stop during the process in the storage space. The hinge housing is thus from the intermediate position on block to the spring cup.

In particular, the main spring is on the path of movement between the closed position and the intermediate position of the door and thus on the first

Movement path section with respect to a force caused by a change in length spring force inactive.

Advantageously, it is provided that the main spring on the path of movement of the door between the intermediate position and the open position and thus also the above-mentioned second movement path section is expandable and one through the

Expansion occurring spring force of the gravity movement of the door is counteracting. The advantages that can be achieved have already been explained above.

It may also be provided in a further embodiment, that instead of the

electromechanical device is formed at least one solenoid in the actuating unit, which also then allows the automatic movement of the door between the closed position and the intermediate position. At another

Design can also be provided that instead of two separate springs, namely a main spring and an auxiliary spring, which are coupled together, only one progressive main spring is formed.

Furthermore, the invention also relates to a method for opening a door of a cooking appliance, in which the door is sunk in a storage space in a housing of the cooking appliance. The door is automatically moved with a door opening device of the cooking appliance at least partially over a total, measured between a closed position and an open position of the door movement path. An essential idea of the method according to the invention is to be seen in the fact that the door, starting from the closed position automatically only up to a

Intermediate position is automatically tilted with an operating unit of the door opening device. The intermediate position is characterized in that the further movement of the door from the intermediate position in the retracted into the storage space open position is carried out automatically and without support of the operating unit and thus without powering only by the force of gravity of the door itself and thus by their weight. The resulting benefits have already been mentioned above in the cooking appliance.

The automatic movement of the door from the closed position into the

Intermediate position is particularly driven by a motor or via a

Lifting magnet.

This automatic movement over the entire path of movement between the closed and the open position of the door, however, in different, the automation effecting concepts - in particular sections motorized and sections only by gravity or in sections by a solenoid device and partially by gravity - divided and these then act in different Movement path sections individually.

Advantageous embodiments of the cooking appliance are to be regarded as advantageous embodiments of the method according to the invention, in which case the respective object components mentioned in the cooking appliance alone or in interaction with each other then enable the resulting process steps. The terms "top", "bottom", "front", "rear", "horizontal", "vertical", "depth direction", "width direction", "height direction", etc. are the intended use and intended arrangement of the device and at a given then before the device standing and looking in the direction of the device given positions and orientations.

Further features of the invention will become apparent 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 alone in the figures, are not only in the respectively indicated combination but also in others

Combinations usable, without departing from the scope of the invention. There are thus also embodiments of the invention as encompassed and disclosed, which are not explicitly shown and explained in the figures, but by separated

Feature combinations emerge from the described embodiments and can be generated. Embodiments and combinations of features are also to be regarded as disclosed, which thus do not have all the features of an originally formulated independent claim. Moreover, embodiments and combinations of features, in particular by the embodiments set out above, are to be regarded as disclosed, which go beyond or deviate from the combinations of features set out in the back references of the claims.

Embodiments of the invention are described below with reference to schematic

Drawings explained in more detail. 1 is a perspective view of an embodiment of a

cooking appliance according to the invention;

FIG. 2 shows a schematic side view of partial regions of the cooking appliance according to FIG. 1 with a partially opened door; FIG.

3 shows a perspective view of subcomponents of an actuating unit of the cooking appliance; 4 is an illustration of the components according to FIG. 3 in a different perspective view;

5 shows a side view of the components according to FIG. 3 and FIG. 4 with additional illustration of the door in the closed position;

6 shows a representation of components of an electromechanical device of an actuating unit in a first operating position;

FIG. 7 shows the illustration of the components according to FIG. 5 with a door arranged in an intermediate position in contrast thereto; FIG. and

Fig. 8 shows the components of the electromechanical device of FIG. 6 in an operating condition, as befitting the arrangement of the door in the intermediate position shown in FIG. 7.

In the figures, the same or functionally identical elements are the same

Provided with reference numerals.

In Fig. 1, a cooking appliance 1 designed as an oven is shown in a schematic perspective view. The cooking appliance 1 comprises a housing 2 in which a cooking chamber, which is delimited by a muffle (not shown), is formed. In the oven food can be introduced for preparation. The cooking chamber is closed at the front by a door 3, which is shown in Fig. 1 in the closed position. At the front of the door 3, a handle 4 is formed.

In addition, the oven comprises an operating device 5, which in the position and display only by way of example has a display unit 6 and operating elements 7 and 8.

In addition, cooking zones 9, 10, 11 and 12, also shown by way of example only with regard to position and number, are likewise shown. The door 3 can be inserted in its lower portion 13 in the housing 2

or be sunk, which is the case in the transfer of the door 3 from the closed position shown in Fig. 1 in the fully open position. The door 3 is then inserted sunk into a free space of the housing 2, which is formed by this space arranged below the cooking chamber and separated by this by a corresponding partition wall storage space 14.

The door 3 is connected to exemplarily shown and marked door hinges 15 and 16 and pivotable about this and in said storage space 14 retractable and extendable.

In Fig. 2, the cooking appliance 1 is shown in a schematic and with respect to existing components only partial side view in the lower area with partially open door 3. A bearing unit 17 of a hinge 15 or 16 is shown. The hinges 15 and 16 are particularly identical and functionally identical, so that the following explanation for one of the two hinges 15 and 16 also applies to the other.

The hinges 15 and 16 have in addition to a respectively provided storage unit 17 and a respective hinge housing 25. These hinges 15 and 16 are in particular also each a guide device 18 with respect to the components and the

Functions assigned. The door 3 is guided by means of these guide devices 18, which are also of identical design, guided by movement and thereby coupled accordingly, so that they in the storage space 14 in and out of the

Storage space 14 is led out. The bearing unit 17 comprises a, in particular U-shaped, bearing bracket or hinge arm 17a. The hinge arm 17a is preferably rotatable about a pivot point which is arranged on a rotation axis A, which extends in FIG. 2 perpendicular to the plane of the figure. The storage unit 17 is also with the

Hinge housing 25 connected and pivotable relative to the hinge housing 25. The bearing unit 17 comprises two guide elements 19 and 20, which are designed as rollers and are mounted rotatably mounted on the hinge arm 17a.

2, a vertical height h is shown, which represents the extension of a technical part 21, which is the guide device 18 associated. The engineering part 21 describes, in particular, a component which also has a groove or a guideway 22, in which a respective guide carriage 23 is guided during insertion of the door 3 into the storage space 14. The guide carriage 23 is associated with the guide device 18. The door 3 is rotatably connected to the guide carriage 23 at its lower end. The fulcrum is fixed to the door 3 and thus not positionally displaceable.

In contrast, the hinge arm 17a is both rotatable relative to the door 3 with this coupled as well as displaced and thus in its position as an entire component on the door 3 to changeable. For this purpose, a rectilinear guideway 24 or a groove is formed on each side edge of the door 3, in which the guide elements 19 and 20 are received and slide depending on the movement of the door 3 along. Both opposite narrow vertical side edges of the door 3 each have such a guideway 24. As can also be seen in the illustration in FIG. 2, the hinge 15 there also includes a hinge housing 25, which is shown here only as a sketch. The

Hinge housing 25 is rotatably connected to the hinge arm 17a.

In Fig. 3 is a perspective view in the embodiment a

Door opening device 26 is shown, with which the door 3 can be automatically moved from its closed position to an open position. However, this automatic movement is divided into different concepts that effect automatism and these then act in different ways

Movement path sections individually. This door opening device 26 can be started via an operating element 27 (FIG. 1). The position and design of the

Operating element 27 in FIG. 1 is to be understood merely as an example. The operating element 27 may be, for example, a push button which is pressed by a user.

In Fig. 3 is also shown here that is limited by walls 28 and 29 of the engineering part 21 of the storage space 14 laterally. The already mentioned guideways 22 are formed on the storage space facing inner sides of these walls 28 and 29, respectively. As can also be seen in Fig. 3, the coupled to the opposite guideways 22 guide carriage 23 are connected to a rigid connection rod 30 therein.

The hinge housing 25 is shown in Fig. 3 in the cut or

Broken state shown, so that can be looked inside.

In Fig. 3 it can be seen that the door opening device 26 in the embodiment shown has an actuating unit 31, with which the automatic movement of the door 3 can take place. This automatic movement thus means that without specific attacking of a user of the door 3 and thus without any force generated, in particular pulling force on the door 3 by a user, the door 3 can still be opened motor driven.

This actuating unit 31 is designed to automatically tilt the door 3, starting from the closed position, in particular driven by a motor, only up to an intermediate position. This intermediate position is characterized in that at this point the further movement of the door 3 from the intermediate position in the completely in the storage space 14 retracted open position automatically and without further support and thus without motorized driving through the

Actuator 31 is done only by the weight of the door 3 itself.

The actuation unit 31 comprises an electromechanical device 32. The electromechanical device 32 has a motor drive or a motor 33 in the exemplary embodiment. In addition, this includes

electromechanical device 32, a lifting wheel 34 which is driven by the motor 33, in particular rotated. In addition, the electromechanical device 32 comprises a particular rectilinear lifting rod 35 which is connected to the lifting wheel 34. On a lifting wheel 34 remote from the lower end of the lifting rod 35, a cable lever 36 is arranged. The cable lever 36 is rotatably connected to this lower end of the lifting rod 35. At this cable lever 36 two separate cables 37 and 38 are connected. The cables 37 and 38 each extend to rocker arms of

electromechanical device 32. There is a drag lever 39 is arranged on the hinge 15. In particular, it is provided here that the drag lever 39 rotatably on the Hinge housing 25 is fixed, in particular with a coupling element 40, which may be a coupling pin, the hinge arm 17 a coupled. This coupling element 40 is fixedly attached to the hinge arm 17a, whereas the drag lever 39 is rotatably attached to the hinge arm 17a. In a corresponding embodiment, a drag lever is arranged on the hinge 16 and connected to the cable 37. As can be seen in the illustration of FIG. 3, the cable 38 is connected to the finger lever 39.

In addition, it is also provided that the actuating unit 31 in

Hinge housing 25 has a main spring 41. The main spring 41 is connected via a connection 42 with the hinge arm 17a. In addition, a spring cup 43 is arranged in particular outside of the hinge housing 25 and separately therefrom, which is arranged in particular in the housing 2. In the spring cup 43 an additional spring 44 (Fig. 5) is arranged. The auxiliary spring 44 has a second spring hardness, which is smaller than a first spring stiffness of the main spring 41st

The main spring 41 in the form of its particular spiral spring is arranged with respect to its longitudinal axis parallel or coaxial in series with the longitudinal axis of the additional spring 44, which is also designed as a particular spiral spring. The main spring 41 is connected via a rigid coupling rod 45 with the auxiliary spring 44. The additional spring 44 is fixed with a rear end fixed to a connection point 46, which is in particular in the spring cup 43.

In a corresponding embodiment, but provided without further reference numerals, corresponding to the hinge 16 is provided.

FIG. 4 shows the component arrangement according to FIG. 3 in a different perspective. For further explanation, reference is made below to FIG. 5. In this illustration, the door 3 is shown in the closed state. she is here

in particular thus arranged vertically oriented. In this closed state, a rear end 25a of the hinge housing 25 is spaced from the one

Hinge housing 25 facing the front end 43a of the spring cup 43rd In Fig. 6, the relevant operating position of the Hubrads 34, the lifting rod 35 and the cable lever 36 is shown.

If now an opening of the door 3 is desired, a user can actuate the operating element 27. Thereby, the start of the automatic opening of the door 3 is effected. The drive 33 is then started via a control unit. The lifting wheel 34 is then rotated starting from the basic position shown in FIG. This will be the

Lifting rod 35 is raised and spent the cable lever 36 in this respect even more horizontal position. By the movement and the associated change in position of the cable lever 36 is pulled to the cables 37 and 38. This in turn causes a corresponding tightening on the follower levers 39 shown in the basic position in Fig. 5 by this then from the basic position to the rear pivoting the

Drag lever 39 is a pulling force and thus pivoting of the hinge arm 17a of the hinge 15 and the corresponding hinge arm of the hinge 16 causes. As a result, the door 3 is moved from the closed position shown in FIG. 5 into an intermediate position shown in FIG. 7. The intermediate position of the door 3 is at an angle α between in particular 18 ° and 22 °, preferably 20 °, relative to the vertical and thus in particular the closed position of the door 3 shown in Fig. 5. It is envisaged that these motor-driven, automatically generated movement of the door 3 is only up to this intermediate position. The motor movement is then no longer completed in the following from the intermediate position in the retracted in the storage space 14 and fully open position of the door 3. Starting from the intermediate position of the door 3, this has namely reached a tilted position, from which they themselves by their own weight and thus in turn

weight automatically further tilts down and then enters the storage compartment 14. It is therefore a motorized automatic movement of the door 3 only on the short tilting path between the closed position shown in FIG. 5 and the

Between position shown in FIG. 7 performed. On the further tilting path from the intermediate position to the open position of the door 3, the motor 33 is inactive

or deactivated. In particular, it is also provided that on this first movement path section between the closed position of the door 3 and the intermediate position of the door 3, the main spring 41 substantially, in particular completely längenunveränderlich and thus is neither compressed nor expanded. Through the action of the

Drag lever 39, the hinge housing 25 is moved in the direction of the spring cup 43 until it abuts in the intermediate position of the door 3 as shown in FIG. 7 with the rear end 25 a at the front end 43 a of the spring cup 43. This is also shown in FIG. 7. It is thus on the first movement path section between the

closed position and the intermediate position of the door 3, only the auxiliary spring 44 compressed, in which case due to the different spring hardness, the displacement of the main spring 41 in the direction of the auxiliary spring 44 and the compression force generated by this shift is transmitted via the coupling rod 45 to the auxiliary spring 44.

Is then reached this intermediate position and the associated direct

Adjacent to the hinge housing 25 and the spring cup 43, the main spring 41 is expanded upon further opening movement of the door 3, wherein the hinge housing 25 remains adjacent to the spring cup 43. Due to the expansion of the main spring 41, a spring force is generated, which counteracts the force of gravity of the door 3, so that no unrestrained further downwards tilting of the door 3 takes place from the intermediate position to the open position. By this expansion of the main spring 41 and the resulting spring force generated thus a certain cushioning or damping of the second Bewegungswegabschnitts the door 3 is thus achieved from the intermediate position to the open position. In Fig. 8, the lifting wheel 34, the lifting rod 35 and the cable lever 36 in the

Operating state and thus shown the position at which the door 3 in the

Intermediate position is.

In particular, it is provided that upon further actuation of the Hubrads 34 the

Drag levers 39 are automatically returned to their normal position. This ensures that by a single complete revolution of the Hubrads 34 and thus a revolution of 360 °, the drag lever 39 from its basic position shown in FIG be moved to the maximum deflection position shown in Fig. 7 and back back home position.

LIST OF REFERENCE NUMBERS

1 cooking appliance

2 housings

3 door

4 handle

5 operating device

6 display unit

7 control element

8 control element

9 cooking zone

10 cooking zone

1 1 cooking zone

12 cooking zone

13 area

14 storage space

15 hinge

16 hinge

17 storage unit

17a hinge arm

18 guide device

19 guide element

20 guide element

21 technical part

22 guideway

23 guide carriages

24 guideway

25 hinge housing

25a rear end

26 door opening device

27 control element

28 wall

29 wall

30 connecting rod 31 operating unit

32 device

33 engine

34 lifting wheel

35 lifting rod

36 cable lever

37 cable pull

38 cable pull

39 drag lever

40 coupling element

41 main spring

42 connection

43 spring pot

43a front end

44 additional spring

45 coupling rod

46 connection point

Claims

1 . Cooking appliance (1) with a door (3) for closing a cooking chamber, which can be lowered into a storage space (14) in a housing (2) of the cooking appliance (1), and with a door opening device (26) at least partially over an entire, between a closed and an open position of the door (3), the automatic movement of the door (3), characterized in that the door opening device (26) comprises an actuating unit (31) with which the door (3) is moved from the closed position is automatically tilted to an intermediate position, wherein the intermediate position is characterized in that the further movement of the door (3) of the

Intermediate position in the retracted into the storage space (14) open position automatically by the gravity of the door (3).

2. cooking appliance (1) according to claim 1, characterized in that the intermediate position at a tilt angle (a) between 15 ° and 30 °, in particular between 18 ° and 22 °, is reached to the closed position.

3. cooking appliance (1) according to claim 1 or 2, characterized in that the

Actuating unit (31) comprises an electromechanical device (32) which is connected to at least one cable (37, 38) with a drag lever (39), which with a hinge arm (17a) of a hinge (15, 16), which for pivoting and Retraction of the door (3) is formed in the storage space (14) is coupled, wherein by a on the drag lever (39) via the cable (37, 38) acting tensile force of the drag lever (39) is pivotable about a pivot axis and depending thereon the hinge arm (17a) is pivotable such that the door (3) is automatically tiltable from the closed position to the intermediate position.

4. cooking appliance (1) according to claim 3, characterized in that the hinge (15, 16) has a hinge housing (25), with which the hinge arm (17 a) is rotatably connected and the drag lever (17 a) pivotally mounted on the

Hinge housing (25) is arranged.

5. cooking appliance (1) according to one of claims 3 or 4, characterized in that the electromechanical device (32) has a motor drive (33), a by the motor drive (33) rotatable lifting wheel (34) and one with the lifting wheel ( 34) connected to the lifting rod (35), wherein the lifting rod (35) by a

Rotation of the lifting wheel (34) is linearly movable, and depending on the coupled with the lifting rod (35) cable (37, 38) is actuated.

6. cooking appliance (1) according to claim 5, characterized in that by an entire revolution of the Hubrads (34) by 360 ° by the chain of action between the Hubrad (34) and the hinge arm (17 a) the door (3) from the closed position placed in the intermediate position, in particular the drag lever (39) is automatically returned to its normal position.

7. cooking appliance (1) according to any one of the preceding claims, characterized in that the hinge housing (25) has a main spring (41) with a first spring hardness, wherein the main spring (41) with an additional spring (44), the one to the first spring hardness smaller second spring hardness, is connected, wherein the

Hinge housing (25) of a hinge (15, 16), which is designed for pivoting and retracting the door (3) in the storage space (14), on the

Movement path between the closed position and the intermediate position of the door (3) relative to a fixed connection point (46) of the auxiliary spring (44) is movable.

8. cooking appliance (1) according to claim 7, characterized in that the main spring (41) with the auxiliary spring (44) via a, in particular rigid, coupling rod (45) is connected.

9. cooking appliance (1) according to claim 7 or 8, characterized in that the main spring (41) and the additional spring (44), in particular via a coupling rod (45) are connected so that on the path of movement between the closed position and the Intermediate position of the door (3), the additional spring (44) is compressible and the main spring (41) remains variable in length.

10. Cooking appliance (1) according to one of claims 7 to 9, characterized in that a longitudinal axis of the main spring (41) is arranged parallel or in a straight line extension to a longitudinal axis of the additional spring (44).

1 1. Cooking appliance (1) according to one of claims 7 to 10, characterized in that the additional spring (44) in a spring cup (43) is arranged, which is arranged stationary.

12. cooking appliance (1) according to claim 1 1, characterized in that the

Hinge housing (25) in the closed position of the door (3) spaced from the spring cup (43) is arranged and with the achievement of the intermediate position, the hinge housing (25) on the spring cup (43) is arranged adjacent.

13. Cooking appliance (1) according to one of claims 7 to 12, characterized in that the main spring (41) is inactive on the path of movement between the closed position and the intermediate position of the door (3) with respect to a spring force to be effected by a change in length.

14. cooking appliance (1) according to one of claims 7 to 13, characterized in that the main spring (41) is expandable on the path of movement of the door (3) between the intermediate position and the open position and a spring force occurring due to the expansion of gravity Door (3) is counteracting.

15. A method for opening a door (3) of a cooking appliance (1), in which

the door (3) is sunk into a storage space (14) in a housing (2) of the cooking appliance (1), the door (3) being automatically connected to a door opening device (26) of the cooking appliance (1) at least partially over a whole, between a closed and an open position of the door (3) dimensioned

Moving path is moved, characterized in that the door (3) is tilted starting from the closed position automatically to an intermediate position with an actuating unit (31) of the door opening device (26), wherein the intermediate position is characterized in that the further movement of the door (3) is automatically performed by the gravity of the door (3) from the intermediate position in the retracted into the storage space (14) open position.