KITCHEN APPLIANCE WITH SCALE FOR USER INTERFACE

Description

[0001] The invention relates to a kitchen appliance with a scale for measuring the weight of food.

[0002] A kitchen appliance is a device used in a kitchen for and in connection with the preparation of a meal. A kitchen appliance may include a preparation space in which a meal can be prepared. The preparation space may be an integral part of the kitchen appliance. However, the preparation space may also be provided by a preparation vessel that is a detachable part of the kitchen appliance. If the preparation vessel is a detachable part, the preparation vessel can be used separately from a base unit of the kitchen appliance.

[0003] Food can be brought into the preparation container or preparation area. Food located in the preparation area or preparation container can be processed and prepared by the food preparation container. For example, the kitchen appliance can weigh, mix, chop, and / or temper, i.e., heat, one or more foods located in the preparation container or preparation area.

[0004] Examples of kitchen appliances include cooking appliances, food processors, stoves, ovens, microwaves, refrigerators, freezers, kitchen scales, waffle irons, deep fryers and steamers.

[0005] The scale can be used to determine the weight of food. For example, the kitchen appliance can include a container into which food can be placed, allowing the weight of the food placed inside to be determined using the scale. The scale includes several force sensors to determine the weight.

[0006] EP 3 398 495 A1 discloses a food processor comprising a base unit, a preparation vessel, and a weighing device, i.e., a scale. The weighing device can detect weight changes. Using these detected weight changes, states of the food processor can be determined, such as the lifting of the food processor or the weight of food placed in the preparation vessel.

[0007] EP 3 781 002 B1 discloses a device for processing foodstuffs with a weight sensor. The weight sensor can determine the weight of foodstuffs. Furthermore, a control unit can receive measurement signals from the weight sensor and control the operation of the device based on them.

[0008] EP 3 936 016 A1 describes a food preparation device with a sensor for detecting a pressure force exerted on a part of the food preparation device and / or a weight of a chopped food.

[0009] DE 10 2008 040 740 A1 relates to a food processor with a base on which a plurality of feet are arranged for positioning the food processor on a surface. The food processor includes a weighing device.

[0010] The object of the invention is to further develop a kitchen appliance.

[0011] The problem is solved by a kitchen appliance having the features of the first claim. Advantageous embodiments emerge from the dependent claims.

[0012] To solve this problem, a kitchen appliance with a control device for controlling the operation of the kitchen appliance is used. The kitchen appliance includes a scale for measuring the weight of food. The kitchen appliance is configured so that the scale can detect a pressure on the top of the kitchen appliance. If the scale detects a pressure, the control device can determine the position of the pressure. The control device can control the operation of the kitchen appliance depending on the position.

[0013] Pushing means that a user of the kitchen appliance exerts pressure on the kitchen appliance with a part of their body. The body part can be a finger. If a tilting movement is exerted on the kitchen appliance by pulling upwards, this shifts the weight of the kitchen appliance. Such a tilting movement basically corresponds to pushing towards a position on top of the kitchen appliance. For example, pulling the side handle of a preparation vessel upwards can cause a tilting movement that corresponds to pushing towards a position on top of the kitchen appliance. However, lifting a kitchen appliance completely by pulling upwards does not correspond to pushing towards a position on top of the kitchen appliance.

[0014] Pulling upwards can result in at least one force sensor on the scale being loaded and at least one other force sensor on the scale being unloaded. The force sensors on the scale may be arranged in such a way that the load on a force sensor can only be unloaded by pulling upwards. This can be the case, for example, if force sensors are arranged exclusively on the outer circumference of the kitchen appliance. In this case, a distinction can be made between pulling upwards and pressing on the top. Pulling can then be an additional input option for controlling the kitchen appliance.

[0015] A kitchen appliance can be controlled differently by pulling upwards than by pressing on the top, provided the kitchen appliance is configured to distinguish between pulling and pressing. The position of an upward pull can also be optionally detected. Therefore, the kitchen appliance can also be controlled by the control device in conjunction with an upward pull, depending on the position.

[0016] The term “top” refers to a surface of the kitchen appliance that can be reached from above when the kitchen appliance is in its intended position. If pressure is applied to the top, a force acts perpendicularly on the kitchen appliance. A vertical side wall of the kitchen appliance is not the top of the kitchen appliance because pressure cannot be applied to such a side wall from above. If pressure is applied to a vertical side wall from the side, there is no pressure force exerted directly by the user that acts perpendicularly on the kitchen appliance. This therefore does not generally mean that the control device can control the operation of the kitchen appliance by pressing on the vertical side wall. However, if pressure is applied to a vertical side wall, this can cause a tipping movement and an associated shift in weight.As already described, such a tilting movement basically corresponds to pressing on a position on the top of the kitchen appliance.

[0017] If the kitchen appliance is designed in such a way that a distinction can be made between a tilting movement caused by a sideways push and a push on the top, a sideways push can be an additional way of controlling the kitchen appliance depending on whether the top or the side is pressed.

[0018] A kitchen appliance is a set of at least loosely connected parts that are used together to prepare a meal. A hob with a saucepan placed on it is a set of parts that constitute a kitchen appliance. A food processor, operated together with an accessory attached to the food processor, is a set of parts that constitute a kitchen appliance.

[0019] The kitchen appliance is set up in such a way that the scales can not only detect when the top is pressed, but also the position of the pressure, i.e. the point on the top that was pressed. If, for example, a middle position on the top is pressed with a first force, the scales will measure at least a first measured value. If a position adjacent to the middle position on the top is pressed with the first force, the scales will measure at least a second measured value. The two measured values ​​will then differ because different positions were pressed. The scales can therefore detect that different positions were pressed. The measured value(s) from the scales are then a measure of the position that was pressed.

[0020] The control device is configured to determine a pressing position based on one or more measurement results from the scale. For example, the control device can be configured to detect whether the pressure has been applied to a middle position or to a position adjacent to the middle position.

[0021] Controlling the operation of the food preparation appliance means changing a state of the kitchen appliance.

[0022] A change in the state of a kitchen appliance could mean, for example, switching the appliance on or off. If the kitchen appliance is switched off, it cannot be used to prepare a meal. Preparing a meal therefore requires the appliance to be switched on. When the kitchen appliance is switched on, the operating system of the kitchen appliance may be running. When the kitchen appliance is switched on, electrical devices such as the display may be switched on. If such a kitchen appliance is switched off, this could mean that the operating system is shutting down. Furthermore, devices such as the display may be switched off when the kitchen appliance is switched off.

[0023] A change in the state of the cooking appliance means, for example, setting and / or changing a target temperature to be achieved in a preparation chamber of the food preparation appliance, setting and / or changing a speed of movement of a tool or a target temperature or another component of the cooking appliance, or setting and / or changing a timer of the cooking appliance.

[0024] If the kitchen appliance includes a mixing and / or cutting tool, for example, the speed of the mixing and / or cutting tool can be changed by pressing, for example. A mixing tool can be used to mix food. A cutting tool can be used to chop food. A tool that can be used for both mixing and chopping can comprise a shaft and one or more blades protruding from the shaft. The blades can have sharp edges on one side for chopping and blunt on the opposite side. If the tool is turned towards the blunt edge, it basically only mixes. This applies at least when the speed is low, for example no more than 1000 revolutions per minute or no more than 500 revolutions per minute. If the tool is turned towards the sharp edge, it basically chops.This applies at least when rotating at high speeds of, for example, at least 2000 revolutions per minute or at least 5000 revolutions per minute.

[0025] For example, if the kitchen appliance includes a fan, the speed of the fan can be changed by pressing it.

[0026] A change in the state of the kitchen appliance can include activating or deactivating a measurement. For example, a weight measurement can be activated. If weight measurement is activated and a food item is brought into a preparation area of ​​the kitchen appliance, for example, the weight of the food item in the preparation area can be shown on a display of the kitchen appliance. If weight measurement is deactivated, no measured weight is shown on the display. Measuring and displaying a measured value do not constitute a change in the operating state of the kitchen appliance within the meaning of the present invention.

[0027] A change in the state of the kitchen appliance may include activating or deactivating a program or a step within a program of the kitchen appliance. For example, a program for automated or semi-automated preparation of a food may be activated or deactivated. For example, a step within a program for automated or semi-automated preparation of a food may be activated.

[0028] Changing the state of the kitchen appliance may involve restarting the kitchen appliance.

[0029] A change in the state of the kitchen appliance may involve changing an information state of the kitchen appliance, which may affect the subsequent operation of the kitchen appliance. For example, pressing the top of the kitchen appliance can signal the presence of a user to the kitchen appliance. The kitchen appliance then has the information that a user is present or has reappeared, which is a prerequisite for other state changes that are only possible when a user is present.

[0030] A change in the state of the kitchen appliance can therefore include changing binary values ​​of the kitchen appliance, such as switching it on or off, changing discrete values, such as values ​​for speed levels for a mixing and / or cutting tool, or changing such values ​​continuously.

[0031] The operation of the kitchen appliance can be controlled depending on the detected position. For example, if the middle position is pressed, weighing can be activated or deactivated. If weighing is activated, the kitchen appliance can measure the weight of a food item and display it visually and / or acoustically, for example. This is not possible in the deactivated state. If, for example, the top of the kitchen appliance is pressed outside the middle area, the kitchen appliance can be switched on or off.

[0032] The invention allows the top of the kitchen appliance to be used for pressing to control operation. This provides a user interface that can be implemented using components already present in a kitchen appliance for other purposes. The user interface can therefore be provided with minimal technical effort. This user interface is highly resistant to external influences. Using the user interface, many operating states of the kitchen appliance can be changed.

[0033] The area of ​​the floor of a preparation chamber of the kitchen appliance and / or the area directly above the floor of a preparation chamber of the kitchen appliance and / or the area of ​​a storage area for a preparation vessel can be excluded from the possibility of controlling the operation of the kitchen appliance by pressing, at least during a predetermined operating state of the kitchen appliance.

[0034] Therefore, at least during a given operating state, pressing the floor of the preparation chamber does not result in the scale detecting the pressing, and the operation of the kitchen appliance is then controlled based on the detected pressing. For example, if the user presses a finger on the top surface of the kitchen appliance that is located next to the floor of the preparation chamber when viewed from above, the operation of the kitchen appliance can be controlled independently of the operating state of the kitchen appliance.

[0035] If the kitchen appliance includes a surface on which a preparation vessel for preparing a meal can be placed, the area of ​​the surface can be excluded from changing the operating state of the kitchen appliance by pressing, at least during a given operating state of the kitchen appliance. Pressing the surface therefore does not result in the scale detecting the pressing and then controlling the operation of the kitchen appliance depending on the detected pressing.

[0036] An area directly above the floor of a preparation chamber of the kitchen appliance can be excluded, at least during a predetermined operating state of the kitchen appliance. Pressing on an area of ​​the kitchen appliance that is directly above the floor of the preparation chamber does not therefore result in the operation of the kitchen appliance being controlled depending on the detected pressure. The area above the floor can, for example, be a lid of a preparation container. If the lid is pressed and the lid is located directly above the floor when viewed from above and not, for example, to the side next to the floor, this cannot result in the control device controlling the operation of the kitchen appliance. This applies at least for a predetermined operating state.

[0037] This can prevent the control device from unexpectedly interpreting the filling of food into the food preparation area as meaning that the operation of the food preparation appliance is to be controlled in a predetermined manner.

[0038] For example, pressing on the floor of a food preparation compartment of the kitchen appliance, on an area directly above the floor of the food preparation compartment and / or on a base of the kitchen appliance may switch the kitchen appliance on. Once switched on, it may no longer be possible to control the operation of the kitchen appliance by pressing on the floor of a food preparation compartment of the kitchen appliance, on an area directly above the floor of the food preparation compartment and / or by pressing on the base of the kitchen appliance. It is therefore not always impossible for pressing on the floor to control the operation of the kitchen appliance. Instead, this only applies when the kitchen appliance is switched on.

[0039] This can prevent the control device from unexpectedly interpreting the filling of food into the food preparation area as meaning that the operation of the food preparation appliance is to be controlled in a predetermined manner.

[0040] For example, when the kitchen appliance is switched on, pressing on the floor of a food preparation compartment of the kitchen appliance, on an area directly above the floor of the food preparation compartment and / or on a surface of the kitchen appliance can activate the scales so that food can be weighed. When the scales are activated, it is no longer possible to control the operation of the kitchen appliance by pressing on the floor of a food preparation compartment of the kitchen appliance, on an area directly above the floor of the food preparation compartment and / or on the surface of the kitchen appliance. If a vertical force is then exerted on the floor of the food preparation compartment, on the area directly above the floor and / or on the surface, only one weight is ever measured and, for example, displayed.

[0041] This can prevent the control device from unexpectedly interpreting the filling of food into the food preparation area as meaning that the operation of the food preparation appliance is to be controlled in a predetermined manner.

[0042] The kitchen appliance may be configured to determine, by determining the position, whether the pressure has been applied to the floor of the preparation chamber, to the area directly above the floor and / or to the support surface.

[0043] The kitchen appliance can be configured so that the scale automatically deactivates after a predefined period of inactivity. For example, a period of two, three, four, or five minutes can be specified. If no weight measurement is taken within this period, the scale will not be used for weighing. In this sense, the scale is inactive. The weighing option is then deactivated. In particular, the kitchen appliance will not display or otherwise transmit any weight information.

[0044] Pressing on the floor of a food preparation chamber of the kitchen appliance, on an area directly above the floor of the food preparation chamber, and / or on a surface of the kitchen appliance can always result in the operation of the kitchen appliance not being controlled by such pressing. The operating state of the kitchen appliance is therefore irrelevant. This makes it particularly reliable to prevent the control device from unexpectedly interpreting the filling of food into the food preparation chamber as meaning that the operation of the food preparation appliance is to be controlled in a predetermined manner.

[0045] The kitchen appliance's scale can include multiple force sensors for measuring weight and determining the pressing position. The force sensors are spatially separated from each other when viewed from above. The force sensors are arranged side by side. When a weight is measured by the kitchen appliance, a weight force is exerted on the force sensors. This allows the weight of a food item to be measured.

[0046] If a position is pressed directly above a first force sensor, this first force sensor measures a greater force than a second force sensor that is spatially arranged next to the first force sensor. If a position is pressed directly above the second force sensor, this second force sensor measures a greater force than the first force sensor. Providing force sensors arranged next to one another therefore makes it easier to detect a position on the top side of the kitchen appliance that has been pressed. The kitchen appliance can therefore be set up so that the position of a press on the top side of the food preparation appliance can be determined from the forces exerted on force sensors arranged next to one another. Since the force sensors are part of the scale, the scale can detect the position of the press.

[0047] If a row on the top side is to be used for pressing and thus operating the kitchen appliance, then two force sensors can be arranged along a line that runs parallel to the row. Positions along the row can then be determined very precisely. A force sensor can be arranged adjacent to each end of a row. However, this is not necessary in order to be able to determine a position very precisely. There should, however, be a minimum distance of at least 2, 3 or 4 cm between the two force sensors in order to be able to determine positions. For example, one row on the top side is to serve as a slide control. Two force sensors can then advantageously be arranged along a line that runs parallel to the row serving as the slide control.

[0048] Preferably, there are at least three force sensors arranged side by side, distributed in a two-dimensional manner. The force sensors are therefore not arranged exclusively along a straight line. The available top surface of the kitchen appliance can then be used particularly fully to control the operation of the kitchen appliance.

[0049] Preferably, there are exactly three force sensors arranged next to each other, distributed two-dimensionally. The three force sensors then form a triangle. The available top surface of the kitchen appliance can then be fully utilized to control its operation without requiring an excessive number of force sensors.

[0050] The distance between adjacent force sensors can always be at least 5 cm, preferably at least 8 cm, and particularly preferably at least 10 cm. This further improves the ability to determine the position on the top of the kitchen appliance very precisely.

[0051] Preferably, the force sensors form the feet of the kitchen appliance. The kitchen appliance is positioned on the feet so that it can be used as intended for preparing a meal. The force sensors serve a dual purpose in this design. This minimizes the technical manufacturing effort. If there are only three force sensors, then there are only three feet. The kitchen appliance can then be positioned very securely without requiring a level surface.

[0052] However, more than three force sensors can also serve as feet. For example, four, five, or six feet can be provided, which also serve as force sensors for the scale.

[0053] Force sensors can be arranged around the circumference of a circle. Immediately adjacent force sensors can then always be equally spaced. This allows the position on the top of the kitchen appliance where pressure was applied to be determined very precisely.

[0054] The kitchen appliance can be configured in such a way that the strength of the pressure applied to the kitchen appliance by pressing can be detected using the scale. The control device of the kitchen appliance can be configured in such a way that it can control the operation of the kitchen appliance depending on the strength of the pressure. This configuration expands the possibilities of the user interface in order to be able to control and operate the operation of the kitchen appliance in a particularly diverse and / or particularly intuitive way. For example, a particularly strong press with a force above a predetermined pressure threshold can cause the kitchen appliance to be switched on or off. For example, a particularly strong press with a force above a predetermined pressure threshold can cause a target temperature or a speed of a tool or fan to be increased continuously or in stages.With this design, the operation of the kitchen appliance can be controlled depending on predetermined pressure threshold values.

[0055] The kitchen appliance can be configured in such a way that a change in the position of the pressure on the top of the kitchen appliance can be detected with the aid of the scale. The control device of the kitchen appliance can be configured in such a way that it can control the operation of the kitchen appliance depending on the change in position. This embodiment expands the possibilities of the user interface in order to be able to control the operation of the kitchen appliance in a particularly diverse and / or particularly intuitive way. In this embodiment, sliding movements or wiping movements on the top of the kitchen appliance can be used to control the operation. For example, a sliding movement in a first direction can cause the rotational speed of a tool of the kitchen appliance or fan to be increased, or a target temperature to be increased. A sliding movement orWiping in the opposite direction may cause the rotation speed of a tool on the kitchen appliance or fan or a set temperature to be reduced.

[0056] Preferably, at least two force sensors are arranged parallel to and adjacent to the area intended for a sliding movement or wiping movement. A wiping movement can then be detected particularly accurately. An imaginary line between two force sensors then runs, for example, parallel to the area intended for a linear wiping movement. The two force sensors can, for example, be located directly beneath the area intended for a wiping movement. The area for a wiping movement can then be marked, for example, by a linear groove or a linear elevation. The area for a wiping movement can be color-coded.

[0057] The kitchen appliance can be configured so that the duration of pressure on the top of the kitchen appliance can be detected using the scale. The kitchen appliance can be configured so that the control device can control the operation of the kitchen appliance depending on the duration. In this embodiment, one or more duration thresholds can be specified. A duration threshold can be three seconds, for example. If the top of the kitchen appliance is pressed for longer than three seconds, the kitchen appliance can be switched on or off, for example. The kitchen appliance can therefore be controlled depending on predetermined duration thresholds. This embodiment expands the possibilities of the user interface in order to be able to control the operation of the kitchen appliance in a particularly diverse and / or particularly intuitive way.

[0058] The kitchen appliance can be configured so that the scale can detect the frequency of pressing within a specified period of time. The kitchen appliance can be configured so that the control device of the kitchen appliance can control the operation of the kitchen appliance depending on the frequency. For example, a period of two, three, or four seconds can be specified. If the button is pressed only once within such a specified period of time, the operation of the kitchen appliance is controlled differently than if the button is pressed twice or three times within the specified period of time.

[0059] Combinations are possible. For example, it may be necessary to first press the front left housing half, and then press the right housing half with increased force to change values ​​such as speed values ​​or setpoint temperature values ​​continuously or incrementally.

[0060] The kitchen appliance can be configured so that the scale can be used to turn the appliance on and / or off. The kitchen appliance can be configured so that adjustable values ​​for the operation of the kitchen appliance, such as rotation speeds or target temperatures, can be set continuously or in steps using the scale. This can be done depending on the position of the button or depending on the type of button being pressed.

[0061] The kitchen appliance can, for example, be set up so that a strong pressure on the kitchen appliance, which is detected by the scales, shuts it down. The kitchen appliance can, for example, be set up so that a blow to the kitchen appliance, which is detected by the scales and thus a particularly short pressure, switches the kitchen appliance off in an emergency. The kitchen appliance can, for example, be set up so that a function of the kitchen appliance is switched on by a light pressure detected by the scales. A light pressure, for example, can turn the rotating of a mixing tool and / or cutting tool on the kitchen appliance and thus switch a function of the kitchen appliance on or off. A light pressure can, for example, switch the setting of a target temperature on the kitchen appliance and thus switch a function of the kitchen appliance on or off.For example, a light press can turn the weighing and display of a weight, and thus a function of the kitchen appliance, on or off. A light press can reset a displayed weight to zero during weighing, for example.

[0062] If a kitchen appliance can be set to a target temperature, then the kitchen appliance includes a temperature control device to achieve the set target temperature. A temperature control device can cool and / or heat. The kitchen appliance can, for example, include a heating device. The heating device can be located in the preparation chamber or preparation vessel. The preparation chamber or preparation vessel can be brought to a target temperature, for example, by induction. A base unit can include means with which a preparation chamber or preparation vessel can be heated inductively.

[0063] The kitchen appliance can be configured such that a control device of the kitchen appliance can control the operation of the kitchen appliance in response to a detected pressure on the top of the kitchen appliance only if the pressure exceeds a predetermined minimum pressure threshold and / or if the pressure falls below a predetermined maximum pressure threshold.

[0064] By providing a minimum pressure threshold, accidental contact with the appliance can prevent an unplanned change in state, thus preventing malfunctions.

[0065] By providing a maximum pressure threshold, it is possible to prevent an unplanned state change from being triggered by a pressure force that can hardly be achieved by pressing with a finger. Alternatively or additionally, this can ensure that a user avoids pressing with excessive force. Malfunctions can thus be avoided.

[0066] The kitchen appliance can be configured in such a way that a control device of the kitchen appliance can only control the operation of the kitchen appliance depending on a detected pressure on the top of the kitchen appliance if a predetermined minimum pressure increase threshold is exceeded and / or if the pressure exceeds a predetermined maximum pressure increase threshold. Differentiation measures can therefore be provided in order to be able to distinguish particularly reliably between intentional and unintentional inputs. If a finger is pressed on the top of the kitchen appliance, the pressure increases depending on the speed of movement of the finger. There are typical values ​​for an increase in the pressure force measured in this case. If a measured pressure force increases in an atypical manner, this is an indication that a finger was not pressed on the top of the kitchen appliance as planned.By providing pressure increase thresholds, it can therefore be achieved in an improved manner that only a planned pressure on the top of the kitchen appliance can control the operation of the kitchen appliance.

[0067] The kitchen appliance can be configured such that the kitchen appliance can prepare a meal at least partially automatically using an electronically stored recipe. The kitchen appliance can be configured such that a control device of the kitchen appliance can control the operation of the kitchen appliance depending on a detected press on the top of the kitchen appliance in combination with information dependent on the recipe. This means that, at least during recipe-controlled, partially automated, or automated preparation of a meal, pressing on the top of the kitchen appliance only effects control if this is provided for by the recipe. Alternatively or additionally, at least during recipe-controlled, partially automated, or automated preparation of a meal, pressing on the top can only change the state of the kitchen appliance as specified by the recipe.For example, a recipe may specify a target temperature during preparation. Gently pressing the top panel will then only set the target temperature specified by the recipe. A different state of the appliance cannot be changed by gently pressing. This reliably prevents malfunctions due to unplanned force exerted on the top panel of the appliance.

[0068] At least during recipe-controlled, semi-automated, or automated food preparation, a light press can only ever achieve the options specified in the recipe. Typically, a light press will then confirm that a setting specified in the recipe is to be made, such as setting a rotation speed for a mixing and / or cutting tool, setting a target temperature, or setting a timer. Instead of a light press, a long press, a double press within a specified time period, or a wiping motion can also be specified. Malfunctions due to unplanned force exerted on the top of the kitchen appliance can thus be particularly reliably avoided.

[0069] In the case of recipe-controlled, semi-automatic or fully automated preparation of a meal, a position for pressing may be provided in order to be able to exit the recipe-controlled preparation of a meal.

[0070] The kitchen appliance can be configured so that the control device of the kitchen appliance can control the operation of the kitchen appliance depending on a detected pressure on the top of the kitchen appliance in combination with a device status of the kitchen appliance. This means that if the top is pressed, the control device checks the status of the kitchen appliance and controls the operation of the kitchen appliance depending on the result of this check.

[0071] For example, the kitchen appliance prepares a meal semi-automatically, step by step, using a recipe. During the meal preparation process, the food preparation appliance may expect a specific input, such as confirmation that the next step in the recipe should be performed. This can be signaled to the user on a display, for example, with "next." Pressing a specific position or alternatively any button on the top panel can then trigger the start of the next recipe step. The specific position can be visually indicated, for example, with "ok." If the kitchen appliance expects a specific input, this may be due to other inputs or control options that are temporarily excluded at this time.

[0072] For example, a section of handles on a food preparation appliance may only be available for control by pressing if a base unit of the kitchen appliance has detected the presence of the preparation vessel. For example, the kitchen appliance may optionally include a cutting disc for defined food chopping, which may only be operated at low speeds, for example, less than 1000 revolutions per minute. If the kitchen appliance detects the presence of the cutting disc, setting higher speeds by pressing or swiping may be excluded.

[0073] The fact that setting options can be temporarily excluded depending on a detected device status represents an independent invention. This applies in particular to the status-dependent limitation of speeds in a food processor that can be operated with optional accessories such as a cutting disc or juicer, as well as to the status-dependent limitation of maximum possible target temperatures.

[0074] If different sized cooking vessels can be used, the selected cooking vessel can be a device status that affects the control options available by pressing on the top of the kitchen appliance. This can apply similarly to the orientation of accessories.

[0075] The kitchen appliance may comprise a base unit with a base for a preparation vessel. The control device of the kitchen appliance may be configured to control selected functions of the kitchen appliance based on a detected pressure on the top of the housing, for example, only when the preparation vessel is placed on the base. This may also help prevent malfunctions due to unplanned pressure.

[0076] The cooking appliance may be a food processor comprising a mixing and / or cutting tool in the preparation vessel and a motor in the base unit for driving the mixing and / or cutting tool. A food processor may also comprise a heating device with which the preparation vessel can be heated.

[0077] Providing multiple force sensors to enable the surface of a device to be used two-dimensionally as a user interface for controlling or operating the device can also be applied to other devices. The device could, for example, be another household appliance such as a vacuum cleaner. The vacuum cleaner can therefore be configured to detect the position of pressure on its top surface and for a control device on the vacuum cleaner to control the operation of the vacuum cleaner depending on the position of pressure. The advantage of such an interface is that the vacuum cleaner can be operated via a closed and robust surface and the technical manufacturing effort is low. In the case of the vacuum cleaner, the function of being able to weigh something is omitted. This also applies to many other devices.Otherwise, the above also applies to other devices that are not kitchen appliances and / or that are not intended or suitable for weighing food, for example.

[0078] The surface of any device can have symbols, characters, words, letters, elevations and / or depressions that can indicate what effect a particular position can have depending on the device's state. Alternatively or additionally, symbols, characters, words, letters, elevations and / or depressions can indicate device states, for example to show which inputs are possible in which device state. For example, the top of a device can have a switch symbol. If the switch symbol is pressed, the device can be switched on or off, for example. A loudspeaker symbol can be shown on the top. Pressing the loudspeaker symbol can then, for example, switch the device's loudspeaker on or off. A symbol for a slider or dial can be shown on the top.Sliding along the slider symbol or along the outer edge of the dial symbol can then, for example, change the performance of the device, such as the suction power of a vacuum cleaner.

[0079] For example, a circular curve inward or outward can indicate the position for a push. A groove can indicate the position for a swipe or slide motion.

[0080] In addition to the option of controlling and thus operating a device using scales or force sensors, a device or kitchen appliance can also include classic user interfaces such as a touchscreen, rotary knob or switch. The invention also includes the possibility of lifting a part of a kitchen appliance by pulling it upwards, thereby controlling the operation of the kitchen appliance. For example, the kitchen appliance can comprise a preparation vessel which is loosely placed on a base unit of the kitchen appliance during operation. If the preparation vessel is lifted, the operation of the kitchen appliance can be controlled using the control device. For example, a power supply to a heating device of the kitchen appliance can be interrupted as soon as the scale detects that the preparation vessel has been lifted.This embodiment of the invention also represents an independent solution to the problem of providing a technically simple and robust user interface.

[0081] The invention is explained in more detail below.

[0082] They show: The Figure 1 shows a first kitchen appliance, namely a food processor. Figure 2 shows a top view of a second kitchen appliance. The Figure 3 shows a top view of a third kitchen appliance. The Figure 4 shows measurement results. The Figures 5 and 6 show a top view of a kitchen appliance with predefined input positions. Figure 7 shows an evaluation of the measurement results from Figure 4 . The Figure 8 shows a flow chart.

[0083] The Figure 1shows a food processor 1. The food processor 1 comprises a container 2 as a preparation space for a meal, which container 2 is inserted into a holder 3 of the food processor 1. The container 2 comprises a handle 4 to easily remove the container 2 from the holder 3 of the food processor 1. The food processor comprises a locking mechanism with pivoting arms 5. In the Figure 1 In the closed position shown, the arms 5 enclose a lid 6. The lid 6 is then firmly connected to the vessel 2. If the closing mechanism is opened by turning the arms 5, the lid 6 can be removed from the vessel 2.

[0084] The lid 6 includes an opening into which a container 7 is inserted. The container 7 closes the opening in the lid 6. The container 7 can be lifted from the opening at any time, thus creating an opening through which an ingredient can be poured into the container 2. The container 7 can serve as a dosing aid. The container 7 can be transparent, thus allowing a view into the preparation container.

[0085] The food processor 1 includes a base 8 with three feet 9 for installation. The three feet 9 are three force sensors 9 that can measure a force independently of one another. If the top of the food processor 1 is pressed, all three force sensors 9 each measure a force that depends not only on the force of the pressure but also on the position of the pressure.

[0086] A force sensor 9 can comprise a spring body. Each spring body can be compressed or stretched by pressing on the top of the food processor 1. A strain gauge can be attached to the top of the spring body in such a way that the strain gauge is compressed when the spring body is compressed. The length of the strain gauge can therefore be shortened by compressing the spring body. The length of the strain gauge can increase by stretching the spring body. A change in the length of the strain gauge changes its electrical resistance. The electrical resistance is thus, for example, a measure of the force with which the spring body was compressed. The electrical resistance of each strain gauge can be determined using the control device of the food processor 1. The control device thus receives information about the forces exerted on the feet 9.

[0087] The three feet 9 can be arranged such that they form a triangle with three equal sides. In other words, the three feet are arranged along a circle, and immediately adjacent feet are equally spaced from one another. The length of each side of the triangle can, for example, be at least 5 cm, at least 6 cm, at least 8 cm, or at least 10 cm. Such an arrangement enables particularly precise position determination with low manufacturing costs.

[0088] The base part 8 and the holder 3 are part of the base unit 10 of the food processor 1. Arranged in the base unit 10 are, for example, one or more motors, a control unit, a radio unit for wirelessly receiving and / or transmitting data, and / or a power supply to the heating element of the preparation vessel 2. A motor in the base unit can be a drive for a mixing and / or cutting tool in the preparation vessel 2. A motor in the base unit can be a drive for the arms 5 and thus for locking the lid 6.

[0089] The base unit 10 includes a top surface. A visual representation of a circle 11 may be located on the top surface. A forward symbol may be shown on the right edge of the circle. A backward symbol may be shown on the left edge. A start / pause symbol may be shown on the bottom edge. A "MENU" label may be located on the top edge within the circle 11. An on / off switch symbol may be located in the center of the circle 11.

[0090] For example, pressing the power button symbol can turn the food processor on or off. "Turning on" here means that the operating system of food processor 1 starts, i.e., boots up, and the display 12 of food processor 1 turns on. "Turning off" means that the operating system of food processor 1 shuts down and the display 12 of food processor 1 turns off.

[0091] If the food processor 1 is switched on, the other symbols within the circle 11 can be used to control and operate the food processor 1. By pressing the "MENU" label, for example, a display on the display 12 can be changed. For example, an indication may appear on the display 12 indicating that a target temperature can be set to which the interior of the preparation vessel 2 can and should be heated. By subsequently pressing the forward symbol once, the target temperature can then be increased by one step, for example, 5°C. By holding the forward symbol, the target temperature is continuously increased in steps, for example, until the button is no longer pressed or the maximum possible target temperature is set. Each step or level can increase the target temperature by, for example, 5°C or 10°C.However, there can also be steps of varying lengths, for example initially an increase of 5°C per step or level and later by a different value of, for example, just 3°C ​​or 4°C, in order to be able to set a temperature of 98°C or 99°C as the target temperature. By pressing the back symbol once, the target temperature can then be reduced by, for example, 5°C. By pressing and holding the back symbol, the target temperature is continuously reduced in steps until the button is no longer pressed or the minimum possible target temperature is set. By then pressing the start-pause symbol, the heating of the interior can be started, for example. Pressing the start-pause symbol again can then, for example, interrupt the heating.

[0092] By pressing the "MENU" label again, the display 12 can be changed so that, for example, a rotation speed for a mixing and / or cutting tool located in the preparation vessel can now be set. By then pressing the forward symbol once, the rotation speed of the mixing and / or cutting tool can then be increased by one level, for example, from level 1 to level 2. By holding the forward symbol down, the rotation speed is continuously increased in steps until the button is no longer pressed or the maximum possible level is set. By pressing the reverse symbol once, the rotation speed can then be decreased by one level.For example, by holding down the reverse symbol, the rotation speed is continuously reduced in steps until the button is released or the minimum possible rotation speed is set. By subsequently pressing the start / pause symbol, for example, the mixing and / or cutting tool can be started rotating at the set speed. Pressing the start / pause symbol again can then pause the rotation, for example.

[0093] By pressing the "MENU" label again, the display 12 can be changed so that, for example, a timer can now be set. By then pressing the forward symbol once, the timer period can be increased by one second, for example. By holding the forward symbol, the period is continuously increased until the button is no longer pressed or the maximum possible period is set. By pressing the backward symbol once, the period can be decreased by one second, for example. By holding the backward symbol, the period is continuously decreased until the button is no longer pressed or the minimum possible period is set. By setting the timer, you can, for example, set how long the heating lasts and / or how long the mixing and / or cutting tool rotates.If the timer has expired, the heating and / or rotation of the mixing and / or cutting tool is automatically stopped.

[0094] If the food processor 1 is switched on and the lid 6 is pressed, a weight display appears on the display 12 of the food processor 1. If a food item is then added to the preparation container, the weight of the added food item is shown on the display 12. If, for example, the "MENU" label is subsequently pressed, the weight display disappears from the display 12. Another display may appear instead.

[0095] It may also be that a circular movement along the circle 11 can be used to control the operation of the food processor 1.

[0096] The Figure 2shows a top view of a kitchen appliance with a top surface 13. On the top surface 13 there is a heating surface 14. The heating surface 14 can be heated. The heating surface 14 can serve as a base for a preparation vessel 2. At the bottom edge of the image, below the heating surface 14, a slider symbol 15 is visually represented. Between the slider symbol 15 and the heating surface 14 there is a label. On the left side of the label, the word "off" can be seen. In the middle area there is the label "37 degrees Celsius". On the far right there is the label "max". Using the slider symbol 15, a target temperature for the heating surface 14 can be set by sliding or swiping along the slider symbol 15. If the circle symbol below "off" is pressed, the heating is switched off. The label "37 degrees Celsius" indicates the position on the slider symbol 15, which can be set by sliding or swiping.A single swipe motion is required to set the target temperature to 37°C. The label "max" indicates the position on the slider symbol 15 that can be reached by a sliding or swiping motion to set the maximum possible target temperature. To set a target temperature, it may be necessary to always perform a swipe motion along the slider symbol 15 shown on the top side 13, starting from the "off" position, in order to set a target temperature. This prevents accidental force from unexpectedly setting a target temperature.

[0097] Alternatively, a specific temperature value can also be set by simply pressing the symbol 15. This eliminates the need for swiping. Symbol 15 can also include additional information about temperature values, such as 100°C, to easily select a temperature setpoint of 100°C.

[0098] For reasons of reliability, it may be necessary to first press the area of ​​the optically displayed slider symbol 15 once or several times to set a target temperature in order to then be able to set a target temperature for a limited time by means of a swiping movement.

[0099] A distinction can be made between an unplanned and a planned force application based on the force increase and / or the type and intensity of the force. Only forces that are recognized as planned can set a target temperature. This can also be used as an alternative or supplementary measure to prevent target temperatures from being set unplanned.

[0100] In dashed circles the position of the force sensors 9 is shown, which are located below the top side 13, ie below the plane of the Figure 2 The force sensors can be located on the underside of the kitchen appliance and serve as feet. However, the upper surface can also be formed by a movable plate, and the force sensors 9 can be arranged, for example, directly below the plate. The force sensors 9 can form a triangle with three equal sides, as shown.

[0101] The kitchen appliance can have a display, for example, located on a side panel. The kitchen appliance can be wirelessly connected to another device, for example, to use the other device's display. For example, the display can show a set target temperature. For example, the display can show a measured weight.

[0102] If a preparation vessel has been placed on the heating surface, the control device of the kitchen appliance can, for example, automatically detect when a food item is placed into the preparation vessel. Automated detection is possible based on position detection, an analysis of the increase in force and / or the force, specifically with regard to the magnitude and / or duration of the force exerted by the food item on the heating surface 14. Such automated detection can be achieved by comparison with stored reference values. If it is automatically detected that a food item has been placed in the vessel, a weight measurement and display of the measured weight can, for example, take place automatically. Such automated detection can, however, also be used in other ways, for example as a prerequisite for the heating surface 14 to be heated.

[0103] The Figure 3shows a plan view of a kitchen appliance with a top side 13. On the top side 13 there is a preparation vessel 2. The preparation vessel 2 can comprise an integrated heater in order to be able to heat the preparation vessel 2. The preparation vessel 2 can be permanently connected to the top side 13. The preparation vessel 2 can be placed on a base of the top side 13. The preparation vessel 2 can then be removed from the base and used in a mobile manner. Alternatively, the base can be heated in order to be able to heat the preparation vessel 2. In a further embodiment, the base can comprise coils, whereby the preparation vessel can be heated inductively.

[0104] The Figure 3The kitchen appliance shown is designed so that it can detect when a handle 4 of the preparation vessel 2 is pressed. If a handle is pressed, the operation of the kitchen appliance can be controlled. If the lid of the kitchen appliance is pressed, the operation of the kitchen appliance cannot be controlled or only very limited control options are available, such as switching on a weighing function for weighing food that is placed in the preparation vessel 2. The kitchen appliance can be designed so that the top side 14, which is located next to the preparation vessel 2, can also be used to control the operation of the kitchen appliance.

[0105] However, it is also possible to pull on the handle 4, thereby causing a tilting movement and thus controlling the operation of the kitchen appliance.

[0106] In the Figure 4A section of an edge area of ​​the top side 13 of a kitchen appliance is shown. In a test carried out, there was a first force sensor in the top left when viewed from above on the top side 13, a second force sensor in the bottom center, and a third force sensor in the top right. The arrangement of the force sensors below the top side 13 corresponded to that shown in the Figure 2 The arrangement shown. Three different test results are shown. In the three different tests, 16 different positions were pressed several times with different forces. In some cases, the different positions were only 10 mm apart.

[0107] Applied in the Figure 4Below the cutouts of a top side 13, the force f is plotted against time t. There is a measurement curve a for the first force sensor, represented by a dash-dotted line. There is a measurement curve b for the second force sensor, represented by a dotted line. There is a measurement curve c for the third force sensor, represented by a dashed line.

[0108] In the first test, pressure was applied to the left side in the upper half of the cutout of the top side 13 (position 16 in the first cutout of the top side 13 shown on the left). The first force sensor registered strong forces f, and the third force sensor registered still relatively strong forces f. The second force sensor registered negative forces. Thus, the first and third feet were loaded. The second foot was unloaded.

[0109] In the second test, pressure was applied on the lower half of the right side (position 16 in the second section of the upper side 13 shown in the middle). The first force sensor registered negative forces f. The other two force sensors registered forces f of approximately equal strength. Thus, the first foot was unloaded. The other two feet were loaded to a similar degree.

[0110] In the third attempt, pressure was applied in the middle of the lower half (position 16 in the third section of the upper side 13 shown on the right). The second force sensor registered strong forces f. The other two force sensors registered forces f of a similar magnitude. Consequently, the second foot was subjected to a strong load. The other two feet were subjected to a similar, but comparatively light, load.

[0111] The experiments demonstrate that very different measurement results are achieved depending on the position of the pressure, which can also be clearly assigned to the respective position.

[0112] The following describes how measurement results can be evaluated. Figure 5 The device shown is shown in plan view. It stands on three indicated feet 9a, 9b and 9c. The feet 9a, 9b and 9c are located on the underside of the device and are force sensors of a scale. The exact position of the feet 9a, 9b and 9c is known. In addition, four different housing regions 16a, 16b, 16c and 16d are marked on the top 13 of the device, via which touch inputs, i.e. inputs by pressing, are permitted. In the following example, a touch input is to be made via the front right corner and thus via the housing region 16a and is to be clearly assigned to this region 16a via the three feet 9a, 9b and 9c.

[0113] In this way, the positions of the three feet of the scale can be determined in the x / y coordinate system fixed to the device (see also the Figure 5 specified values ​​of the coordinates): ▪ Balance foot 9a: (2.5 / 5) ▪ Balance foot 9b: (4.5 / 2) ▪ Balance foot 9c: (1 / 2)

[0114] Now, using three (in the first step static, linearly independent) mechanical equations, the position of the force introduction point in the x / y coordinate system and the magnitude of the force f can be determined as a function of the measured forces f 9a , f 9b , f 9c , where f 9a is the force measured by the balance foot 9a, f 9b is the force measured by the balance foot 9b and f 9c is the force measured by the balance foot 9c.

[0115] The following applies to the equilibrium of all forces fz in the z-direction (i.e. into the plane shown): The sum of all externally introduced forces corresponds to the sum of the forces on the (three) balance feet 9a, 9b, 9c: ∑ f z = 0 ↔ f 9 a + f 9 b + f 9 c = f

[0116] In addition, two equations result from the moment equilibria for the moment forces Mx around the x-axis and My around the y-axis.

[0117] The following applies to the moment equilibrium around the x-axis: ∑ Mx = 0 ↔ f 9 a * y 9 a + f 9 b * y 9 a + f 9 c * y 9 c = f * y t , where y 9a is the y-coordinate of foot 9a, y 9b is the y-coordinate of foot 9b and y 9c is the y-coordinate of foot 9c.

[0118] If the corresponding coordinates are now taken from the Figure 5 inserted into the equation, we get: ∑ Mx = 0 ↔ f 9 a * 5 + f 9 b * 2 + f 9 c * 2 = f * y t

[0119] The following applies to the moment equilibrium around the y-axis: ∑ My = 0 ↔ f 9 a * x 9 a + f 9 b * x 9 a + f 9 c * x 9 c = f * x t , where x 9a is the x-coordinate of foot 9a, x 9b is the x-coordinate of foot 9b and x 9c is the x-coordinate of foot 9c.

[0120] Will the Figure 5 visible coordinates, the following follows: ∑ My = 0 ↔ f 9 a * 2 , 5 + f 9 b * 4 , 5 + f 9 c * 1 = f * x t

[0121] These three linearly independent equations have three unknowns: Force of touch input f x-coordinate of touch input xt y-coordinate of touch input yt.

[0122] This system of equations can be solved uniquely. In other words, from the three measured values ​​of the force sensors 9a, 9b, and 9c, it is possible to clearly calculate where a vertical force was introduced into the device and its magnitude.

[0123] If corresponding housing regions are now mathematically described and digitally stored, for example, in a database, touch inputs in different housing regions can be differentiated from one another and, in addition, the force of the touch input can be recorded. For example, housing region 16a was clicked, i.e., pressed, if the determined x-value of the touch input is >4 and, at the same time, the y-value of the touch input is <1.5.

[0124] Any housing region can be digitally stored in a database by describing it line by line. If the entire surface of a housing region that is to be used for touch inputs is described line by line, each line value y is assigned a corresponding x-range. Figure 6 For example, a row of the housing region 16c is described by Y=5 and 1.5≥X≥0.5. If each row 0=y≤6 of the housing surface is described in this way, a binary value "Touch region: yes" or "Touch region: no" can be assigned to a touch input and the corresponding touch inputs can be responded to or not responded to.

[0125] Alternatively, the surface can also be described column by column.

[0126] The procedure shown here as an example for the x / y plane can also be transferred to the other two spatial planes (y / z), (x / z) or corresponding combinations of these. In this way, touch inputs, i.e. inputs by pressing, on surfaces that are inclined in space can also be detected and differentiated. To do this, the corresponding distances must be exchanged and / or projected in the equations mentioned above. Differentiation measures can be used here in order to reliably distinguish between planned touch inputs and unplanned touch inputs in order to rule out misinterpretation of touch inputs. The differentiation measures can include assuming a minimum pressure and / or a maximum pressure and / or a minimum pressure increase and / or a maximum pressure increase and / or a minimum period of time for pressing and / or a maximum period of time for pressing in order to be considered a planned press ora scheduled touch input to be recognized.

[0127] The Figure 7 shows an evaluation of the measurement curves from the Figure 4 , in which error compensation calculations and optimizations were omitted. The positions 16 on which the pressure was applied are shown. The small circles 16' in the vicinity of the respective positions 16 are the positions determined by the evaluation. Although the positions were sometimes only 10 mm apart, the different positions could be clearly distinguished. The evaluation also confirmed that different positions can be distinguished very precisely, even if they are only a few millimeters apart.

[0128] An evaluation can be carried out in a static version as follows: The three force sensor information or signals are recorded over time (step 100 in the flow chart of the Figure 8). The maximum values ​​of these individual values ​​are detected by observing the gradient over time (step 110 in the flow chart of the Figure 8 ). The maximum values ​​can be determined by determining the derivative = 0 and by changing the sign of the derivative from + to - shortly before and after the maximum value. Taking the three individual values ​​at the time of the maximum values ​​and calculating the position (step 120 in the flow chart of the Figure 8 ). Three individual values ​​can be summed to determine the applied vertical force, for example to obtain weight information (step 130 in the flow chart of the Figure 8 ). The evaluation can take into account the differentiation measures of force sensor information described above, which serve to distinguish between planned pressing and unplanned force effects.

[0129] In the dynamic case (relevant for a slider, for example), the force sensor information can be further recorded after a detected initial press (see static case above). In subsequent time steps, the positions are calculated from the three force sensor information to detect a swipe or slide movement.

[0130] A swiping motion can sometimes be detected even without an initial touch, for example, because it occurs at a designated housing position. For this purpose, a groove or similar recess or elevation can be incorporated into the top surface to guide the swiping motion and guide the user.

Claims

1. Kitchen appliance (1) comprising a control device for controlling the operation of the kitchen appliance (1) and a scale for measuring a weight of foodstuffs, characterized in that the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on a pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) detected by the scale in dependence on the position of the pressing, wherein the scale comprises force sensors for measuring the weight and for determining the position of the pressing.

2. Kitchen appliance (1) according to the preceding claim, characterized in that the area of the bottom of a preparation space of the kitchen appliance (1) and / or the area just above the bottom of a preparation space of the kitchen appliance (1) and / or the area of a placement surface (14) for a preparation vessel (2) is excluded from the fact that the operation of the kitchen appliance (1) can be controlled at least during a predetermined operating state of the kitchen appliance (1).

3. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) comprises juxtaposed force sensors (9) for a weight measurement and for a determination of the position of pressing.

4. Kitchen appliance (1) according to the preceding claim, characterized in that the kitchen appliance (1) comprises exactly three juxtaposed force sensors (9), which are arranged in a two-dimensionally distributed manner.

5. Kitchen appliance (1) according to one of the preceding claims, characterized in that each force sensor (9) is a foot of the kitchen appliance (1).

6. Kitchen appliance (1) according to the preceding claim, characterized in that the kitchen appliance (1) is configured such that from the forces exerted on the feet (9) and detected by the scale, the position of a pressing on the kitchen appliance (1) is determined.

7. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) is configured such, • that the strength of the pressure force on the upper side (4, 11, 13, 15) of the kitchen appliance (1) caused by a pressing can be detected by means of the scale and the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on the strength of the pressure force and / or • that a change in the position of pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) can be detected by means of the scale and the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on the change in position, and / or • that the duration of pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) can be detected by means of the scale, and the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on the duration, and / or • that the frequency of pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) within a predetermined time period can be detected by means of the scale and the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on the frequency.

8. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) can be switched on and / or off by means of the scale and / or that values adjustable for the operation of the kitchen appliance (1) can be adjusted continuously or stepwise by means of the scale.

9. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) is configured such that the kitchen appliance (1) is shut down by a strong pressing on the kitchen appliance (1) detected by the scale and / or the kitchen appliance (1) is switched off in an emergency by a blow on the kitchen appliance (1) detected by the scale and / or a function of the kitchen appliance (1) is switched on by a light pressing detected by the scale.

10. Kitchen appliance (1) according to the preceding claim, characterized in that the weighing function for weighing foodstuffs is switched on by a light pressing detected by the scale.

11. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) is configured such that the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on a detected pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) only if the pressure exceeds a predetermined minimum pressure threshold and / or if the pressure falls below a predetermined maximum pressure threshold and / or if the pressure exceeds a predetermined minimum pressure rise threshold and / or if the pressure falls below a predetermined maximum pressure rise threshold.

12. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) is able to prepare a food by means of an electronically stored recipe in an at least partially automated manner and the kitchen appliance (1) is configured such that the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on a detected pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) in combination with information dependent on the recipe.

13. Kitchen appliance (1) according to one of the preceding claims, characterized in that the kitchen appliance (1) is configured such that the control device of the kitchen appliance (1) is able to control the operation of the kitchen appliance (1) in dependence on a detected pressing on the upper side (4, 11, 13, 15) of the kitchen appliance (1) in combination with an appliance state of the kitchen appliance (1).

14. Kitchen appliance (1) according to the preceding claim, characterized in that the kitchen appliance (1) comprises a base appliance having a placement surface for the preparation vessel (2) and the control device of the kitchen appliance (1) is able control a function of the kitchen appliance (1) in dependence on a detected pressing on the upper side (4, 11, 13, 15) of the housing only when the preparation vessel (2) is placed on the placement surface.

15. Kitchen appliance (1) according to the preceding claim, characterized in that the kitchen appliance (1) is a food processor comprising a mixing and / or cutting tool in the preparation vessel (2) and a motor in the base appliance for driving the mixing and / or cutting tool, and optionally a heating device.