CN110888287A

CN110888287A - Household appliance with a hand-operated input device

Info

Publication number: CN110888287A
Application number: CN201910763271.5A
Authority: CN
Inventors: A·韦伯; T·迈尔; D·莱沃尔德; A·费尔德迈尔; R·施陶德; T·迪舍尔; A·凯斯勒
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2018-08-20
Filing date: 2019-08-19
Publication date: 2020-03-17
Anticipated expiration: 2039-08-19
Also published as: CN110888287B; DE102018213980A1

Abstract

The invention relates to a household appliance comprising a hand-operated input device (61) comprising a projection device, which is provided for projecting a plurality of input regions (29) onto a projection surface (28), and a sensor device (74), which is provided for recognizing the approach of an object to an input region (29) projected onto the projection surface (28) or the contact of the object with the input region in order to recognize an input into the input device (61) corresponding to the respective input region (29).

Description

Household appliance with a hand-operated input device

Technical Field

The invention relates to a household appliance comprising a hand-operated input device, by means of which, for example, operating parameters of the household appliance can be input.

Background

A household appliance, for example a household refrigerator, a dishwasher or a washing machine, comprises a hand-operated input device, by means of which operating parameters can be output for the operation of the respective household appliance. In the case of a domestic refrigeration device, the operating parameter is, for example, the nominal temperature of the domestic refrigeration device, a specific cleaning program is entered in the case of a dishwasher, and a specific washing program is entered in the case of a washing machine.

Disclosure of Invention

The object of the present invention is to provide a household appliance having an improved input device.

The object of the invention is achieved by a household appliance having a hand-operated input device, which comprises a projection device, which is provided for projecting a plurality of input regions onto a projection surface, and a sensor device, which is provided for detecting the approach of an object to an input region projected onto the projection surface or the contact of the object with the input region in order to detect an input into the input device corresponding to the respective input region.

The household appliance according to the invention is, for example, a household refrigerator, a dishwasher, a washing machine or an oven.

The household appliance comprises in particular an electronic control device which is provided for controlling a proper operation of the household appliance. The input device is in particular connected to the electronic control device in order to input, in particular to input, the operating parameters to the electronic control device. In the case of a domestic refrigeration device, the operating parameter is, for example, the nominal temperature of the domestic refrigeration device, a specific cleaning program is entered in the case of a dishwasher, and a specific washing program is entered in the case of a washing machine.

The input device of the household appliance according to the invention comprises a projection device which, during operation of the household appliance, is capable of projecting an input region onto a projection surface. Preferably, the household appliance comprises a projection surface. The plane of projection is preferably flat. The projected input area comprises in particular information content, for example in the form of letters, signs, symbols and/or images.

The input device further comprises a sensor device. The sensor device is provided for detecting the approach of an object to an input region projected onto the projection surface or the contact of the object with the input region in order to detect an input into the input device corresponding to the respective input region. If, for example, a finger of the operator approaches one of the input regions as an object or touches it, the sensor device recognizes this. The input device thus recognizes that the input field is "activated", i.e. that an input to the input device corresponding to the input field is activated in order to transmit the information to the electronic control unit, for example.

In order to enable an input, for example, according to a menu, according to one embodiment of the household appliance according to the invention the information content is associated with a current input or a current state of the input device, and/or the projection device is provided for changing the information content of the projected input regions on the basis of an input corresponding to one of the input regions. This makes it possible in particular to change the projected information content on the basis of an input, so that an input according to or controlled by a menu is made by means of the input device. The "layout" of the input regions is thereby changed, in particular on the basis of the input, in order to achieve, in particular, a projection of the information content of the input regions according to a menu.

The sensor device preferably comprises a proximity sensor, in particular an infrared proximity sensor.

In an embodiment of the household appliance according to the invention, the sensor device comprises a touch button. The touch keys or touch sensors are in particular sensor keys which effect a change of an electronic or non-electronic parameter under pressure, for example by means of a finger as object. Touch keys are known per se to the person skilled in the art and are for example capacitive touch keys.

The touch keys are arranged in particular in the region of the projection surface, for example below the projection surface. The touch keys are provided for recognizing contact of an object with an input area projected onto the projection surface in order to recognize an input into the input device corresponding to the respective input area.

Since the input region is realized by means of the projection device, it is provided or can be provided for changing the "layout" of the touch keys on the basis of the input, which is to say that in particular the information content of the input region can be projected, in particular in accordance with a menu, with the current input or current state of the input device. The input area thus has in particular a corresponding meaning or function depending on the state or the current input.

According to a preferred variant of the household appliance according to the invention, the sensor device of the household appliance is therefore provided for adapting the arrangement of the touch keys to the currently displayed information content, in order to be able to control and/or set the household appliance, in particular, in accordance with the displayed information content.

The input device may comprise a housing in which the projection device and the sensor device are fixed to the housing.

The household appliance according to the invention may have an interior chamber; providing a door panel for opening and closing the interior chamber, the door panel having an inner side facing the interior chamber and an outer side facing away from the interior chamber; and a handle recess disposed in an outer side of the door panel. The handle groove includes a handle that constitutes a side recess with respect to an outer side of the door panel. The input device is preferably arranged at least partially in the handle, in particular integrated into the handle.

If the domestic appliance according to the invention is a domestic refrigeration appliance, the domestic refrigeration appliance comprises in particular an insulated body with an inner container which delimits an interior chamber. The interior space is a coolable interior space which can be closed by means of door panels and can be cooled by means of a refrigerating device for cooling the coolable interior space. The domestic appliance according to the invention, which is designed as a domestic refrigerator, comprises in particular an electronic control device which is provided to control the refrigerator in such a way that the cooled interior has at least approximately the desired temperature. The nominal temperature can be set by means of an input device.

The domestic refrigeration appliance according to the invention can be, for example, a domestic refrigeration appliance. In this case, the coolable inner chamber is cooled to a temperature of more than 0 ℃. The domestic refrigeration appliance according to the invention can also be a domestic freezer. In this case, the coolable inner chamber is cooled to a temperature of less than 0 ℃. However, the domestic refrigeration appliance according to the invention can also be a combined freezer and refrigerator appliance. The domestic refrigerator according to the invention can have exactly one coolable interior space, but also a plurality of coolable interior spaces, which can also be closed and opened in each case by means of a door leaf.

The handle groove comprises in particular a recess which only partially overlaps the handle and which comprises an outwardly directed surface. The surface is preferably flat. The surface preferably forms a projection surface, so that the projection device can project the input region onto a preferably flat surface of the recess. Thereby, the projection means projects the input area into the grip recess. Since the projection means and the sensor means are at least partially arranged or integrated in the handle, they can be arranged relatively close to the specific projection surface.

Since the input region is only projected into the grip recess when the projection device is switched on, the input region is not visible to the operator in the switched-off state of the projection device. This makes it possible to realize an input device which is not visible to the operator in the closed state.

If a cover device is used for the recess, an input device can additionally be realized, which can be combined in different materials.

The housing preferably at least partially constitutes the portion of the handle forming the undercut. The projection device and the sensor device can thus be fitted into a domestic appliance in a relatively simple manner. The projection means and the sensor means can thus be assembled into one module or assembly.

The door leaf comprises a pocket in the region of the handle, which pocket is in particular designed as a rear part and in which a housing with a projection device and a sensor device fixed therein is fixed.

The household appliance according to the invention can thus be assembled in that the housing with the projection device and the sensor device fixed in the housing is pushed into the pocket and the cover device is fixed in the handle recess in order to cover the recess, wherein the outwardly oriented surface of the cover device constitutes the projection surface. The housing with the projection device and the sensor device fixed in the housing can be fixed in the pocket, for example, by means of a latching device.

The side of the housing facing the outside of the door panel may comprise an opening. The projection device and the sensor device can be guided into the housing for assembly through the opening. The opening of the housing is preferably closed with a housing cover.

The housing comprises in particular a first housing region forming the undercut and a second housing region arranged next to the first housing region and inside the door leaf. The second housing area preferably has a greater depth than the first housing area. The first housing region in particular corresponds to the handle or even forms the handle.

The projection device is preferably configured as a slide projector. The slide projector comprises in particular: light sources, such as LEDs; a collimating lens proximate the light source, the collimating lens converting light generated by the light source into a parallel beam of radiation; a slide next to the collimating lens, the radiation beam being capable of passing through the slide; and a projection lens positioned proximate the slide for producing a projection beam from the beam passing through the slide. The projection beam is arranged to impinge on a projection surface in order to project the input area onto the projection surface. The slide includes images of the input area. The collimating lens thereby focuses the light of the light source and directs it towards the projection lens. The structure ensures a relatively high depth definition of the slide projector at a relatively low manufacturing cost. The projection axis corresponds to a parallel beam or a projection beam, which is oriented parallel to the parallel beam.

Preferably, the light source, the slide and the collimator lens are arranged within the second housing region, i.e. in a partial region of the housing arranged within the door leaf. The projection lens is preferably arranged inside the first housing region, i.e. in a partial region corresponding to the undercut or the handle. This embodiment of the slide projector can thus be arranged at least partially in the handle in a relatively space-saving manner.

The slide projector may comprise a deflection mirror next to the projection lens, which deflects the projection beam in the direction of the projection surface. The deflection mirror is preferably likewise fixed in the first housing region of the housing.

Preferably, the spacing between the collimator lens, the slide and the projection lens is selected such that the collimator lens and the slide are located in a wide section of the module, i.e. in the second housing region of the housing and thus not inside the relatively narrow handle.

The deflection mirror, which is optionally present, is preferably arranged as far forward as possible in order to keep the projection angle onto the projection surface as large as possible.

According to one embodiment of the household appliance according to the invention, the slide projector comprises a plurality of sub-slides arranged side by side, which sub-slides each comprise a collimating lens, a slide next to the respective collimating lens and a projection lens next to the respective slide, and which sub-slides each project one of the input areas onto the projection surface.

According to an embodiment of the household appliance according to the invention, the household appliance is assembled differently. If the input device comprises a housing, in particular the projection device and the sensor device are assembled into a module or assembly. The module itself can then be fitted in the rear part of the door panel. The rear part can be integrated into the handle, for example as part of the handle, or can be mounted as a separate part on the handle on the outside or on the inside of a door panel, in particular in the form of an outer door panel.

The module is then pushed into the rear part, for example, and optionally latched. The cover device for the recess is then inserted into the handle structure and thus forms a relatively flat transition to the module and in particular covers the gap which may occur during assembly between the module and the rear part. The covering means may be made of different materials, for example wood, ceramic, glass or metal. There is no influence on operability because the operation or input process of the detection module itself is realized and a touch sensing device disposed behind the cover device is not required.

The structure of the input device can preferably be optimized in terms of injection molding technology and in terms of simple assembly while observing relatively small tolerances. The individual components are preferably inserted into a housing, which is made in particular of plastic. Structurally preferred contours are provided on all components to ensure that the components are assembled correctly (Poka-Yoke, error and error proofing technique). A housing cover, which is placed after the internal components are assembled, secures all the components in their position.

Drawings

An embodiment of the invention is shown schematically in the drawings. In the drawings:

fig. 1 shows a domestic refrigeration appliance having two door panels arranged side by side, which each comprise a handle recess,

figure 2 shows a front view of one of the panels,

figure 3 shows a side view of the door panel,

figure 4 shows the door panel in a perspective and partly sectional view,

fig. 5 shows a perspective and partially sectional illustration of a partial region of a handle recess with an input device comprising a projection device configured as a slide projector, a sensor device and an input region,

figure 6 shows the slide projector and the sensor device in a perspective view and in a cross-sectional view,

figure 7 shows a side view of the slide projector and sensor device in cross-section,

figure 8 shows a top view of the slide projector and sensor arrangement,

figure 9 shows a top view of a part of a slide projector and sensor device,

figure 10 shows the housing of the slide projector and the sensor device in a perspective view,

figure 11 shows a partial view of the housing,

figure 12 shows a view of the cover of the housing,

FIG. 13 shows a partial view of a housing cover, an

Fig. 14 and 15 show the lens and slide frame of the slide projector.

Detailed Description

Fig. 1 shows a front view of a domestic refrigeration appliance 1 as an example of a domestic appliance.

The domestic refrigerator 1 has an insulated body 2 with an inner container which delimits a coolable interior 4 provided for storing foodstuffs. Inside the coolable interior 4, a shelf 5 is arranged, for example, for storing food.

The domestic refrigeration device 1 shown in fig. 1 comprises in particular two

door panels

20, 20a which are pivotably mounted relative to the body 2 and each comprise a handle recess 23. The

door panels

20, 20a are provided for closing the coolable interior 4 and are accessible in the open state. In the case of the present embodiment, the left door panel 20a is opened, and the right door panel 20 is shown closed. The right-hand door panel 20 is shown in fig. 2 as a front view, in fig. 3 as a side view and in fig. 4 as a perspective and partially sectional view.

In the case of the present exemplary embodiment, the domestic refrigeration device 1 comprises an interior chamber configured as a freezer chamber, which is arranged below a coolable interior chamber 4 which can be closed by

door panels

20, 20a and is provided with a drawer 6 which can be pulled out of the freezer chamber.

In the case of the present embodiment, the domestic refrigeration appliance 1 comprises a refrigeration device 7, in particular in the form of a refrigerant circulation system, and an electronic control device 8 which is provided for controlling the refrigeration device 7. The electronic control device is provided in particular to control the refrigerating device 7 in a manner generally known to the person skilled in the art in such a way that the refrigerated interior 4 and the freezer compartment have at least approximately a predefined or predefinable setpoint temperature. The electronic control device 8 is preferably arranged such that it regulates the temperature of the coolable interior 4 and of the freezer compartment as is known in principle to the person skilled in the art. In order to obtain the actual temperature of the coolable interior 4 and of the freezer compartment if necessary, the domestic refrigerator 1 can have temperature sensors, which are not shown in detail and are connected to the electronic control device 8. In particular, during operation of the domestic refrigeration appliance 1, the nominal temperature of the freezer compartment is less than 0 ℃ and the nominal temperature of the coolable interior 4 is greater than 0 ℃.

The

door panels

20, 20a each comprise an inner side 21 facing the coolable interior 4, an outer side 22 facing away from the coolable interior 4, and a handle recess 23 arranged in the respective outer side 22 of the

door panels

20, 20 a. Fig. 5 shows a detail of the grip recess 23 in a perspective and partially sectional view.

The handle recess 23 comprises a handle 24 which constitutes a side recess with respect to the outer side 22 of the door panel 20.

The handle recess 23 comprises in particular a recess 25 which is only partially covered by the handle 24 forming a lateral recess. In the case of the present exemplary embodiment, the recess 25 has a cover 26 in the form of an insert, which has an outwardly directed flat surface 27.

In the case of the present exemplary embodiment, the domestic refrigeration appliance 1 comprises a hand-operated input device 61, by means of which, for example, operating parameters of the domestic refrigeration appliance 1 can be input. The input device 61 comprises a projection device configured as a slide projector which, during operation of the domestic refrigerator 1, can project an image onto the projection surface 28, and a sensor device 74. In the case of the present embodiment, the outwardly directed flat surface 27 of the cover means 26 of the recess 25 constitutes said projection surface 28. The slide projector and the sensor device 74 are in particular at least partially integrated in the handle 24. Fig. 6 shows the input device 61 in a perspective and sectional illustration, fig. 7 shows a side view of the input device 61 in a sectional illustration, and fig. 8 shows a top view of the input device 61. Fig. 9 shows a partial view of the input device 61 as a plan view.

In the case of the present embodiment, the projected images are a plurality of display areas 29 projected onto the projection surface 28, which display areas may in turn comprise respectively signs, letters or symbols. The projected input area 29 thus comprises, in particular, information content, for example in the form of letters, logos, symbols and/or images.

The input means 61 are connected to the electronic control means 8, whereby said electronic control means are also capable of controlling the slide projector.

In the case of the present embodiment, the input device 61 comprises a housing 62, inside which the slide projector and the sensor device 74 are fixed to the housing 62. The housing 62 of the input device 61 is shown in perspective in fig. 10. Fig. 11 shows a partial view of the housing 62.

The housing 62 may include an opening through which the slide and sensor device 74 may be guided into the housing 62 for assembly. The opening of the housing 62 is preferably closed with a housing cover 62a shown in fig. 12. The housing 62 and the housing cover 62a are made of plastic in particular.

The door panel 20 comprises, in particular in the region of the handle 24, a pocket 30, which is in particular designed as a rear part and in which the slide projector of the input device 61 and the sensor device 74 are fixed by means of the housing 62.

The domestic refrigeration device 1 can thus be assembled in that the housing 62 with the slide and the sensor device 74 fixed therein is pushed into the pocket 30 and the cover device 26 is fixed in the handle recess 23 in order to cover the recess 25. The housing 62 can be secured in the pocket 30, for example, by a snap-lock arrangement.

In the case of the present exemplary embodiment, the housing 62 of the input device 61 comprises a first housing region 63 corresponding to the undercut of the handle 24, in particular forming the undercut, and a second housing region 64 arranged inside the door leaf 20 next to the first housing region 63. The second housing region 64 has in particular a greater depth than the first housing region 63.

In the case of the present embodiment, the slide includes a plurality of sub-slides 91 arranged side by side. In particular, the sub-slide projector 91 comprises a collimator lens 65, a slide 66 next to the corresponding collimator lens 65 and a projection lens 67 next to the corresponding slide 66, respectively. Each of the sub-projectors 91 projects one of the display areas 29 onto the projection surface 28. The collimator lens 65, the slide 66 or its slide frame 66a and the projection lens 67 are shown in fig. 13 as a top view.

In the case of the present embodiment, the collimator lenses 65 arranged side by side are combined into one single member 92. The projection lenses 67 arranged side by side are also combined into a single member 94, and the slide mount 66a of the slide 66 is likewise combined into a single member 93. The components 92 to 94 are made in particular of plastic and are preferably produced in an injection molding process.

The slide projector 61 comprises a light source 68, followed by a collimating lens 65. The light source 68 comprises in particular a plurality of LEDs 69, which are fixed, for example, on the printed circuit board 70. In particular, each sub-slide 91 corresponds to one of said LEDs 69, i.e. each sub-slide 91 comprises an LED 69.

Collimating lens 65 converts the light produced by light source 68 or individual LEDs 69 into parallel beams that pass through slide 66 for conversion in turn by projection lens 67 into projection beams that each include information about display surface 29 to be projected.

The beams or projection beams correspond to respective projection axes 71.

In the case of the present exemplary embodiment, the light source 68 or LED69, the slide 66 and the collimating lens 65 are arranged within the second housing area 64, i.e. in a partial area of the housing 62 of the input device 61 which is arranged within the door leaf 20. The projection lens 67 is arranged inside the first housing region 63, i.e. in a partial region corresponding to the side recess or the handle 24.

In the case of the present embodiment, the slide projector 61 comprises a deflection mirror 72 next to the projection lens 67, which deflects the projection beam in the direction of the projection surface 28. The deflecting mirror 72 is likewise fixed in the first housing region 63 of the housing 62.

The housing 62 comprises an injection-molded window 73 through which the projection beam 71 deflected by the deflection mirror 72 passes from the housing 62.

In the case of the present exemplary embodiment, the cover device 26 and thus the projection surface 28 are oriented obliquely with respect to the parallel beam or the projection axis 71 of said beam. The projection plane 28 preferably encloses an angle of 5 ° to 45 ° with the parallel beam or projection axis 71.

In the case of the present exemplary embodiment, the housing 62 comprises a non-snap-in

guide

95, 96, 97, into which the combined

components

92, 93, 94 of the collimator lens 65, the slide frame 66a and the projection lens 67 are pushed without snap-in for fastening to the housing 62.

Furthermore, the housing cover 62a is configured such that it presses the collimating lens 65, the slide mount 66a and the projection lens 67, which are combined into the

individual components

92, 93, 94, respectively, into the

guides

95, 96, 97, thereby fixing the

components

92, 93, 94 in the housing 62. To press the

components

92, 93, 94 into the

guides

95, 96, 97, the surface 80 of the housing cover 62a facing the interior of the housing 62 may include a profiled rib 81.

In the case of the present exemplary embodiment, the surface 80 of the housing cover 62a facing the interior of the housing 62 comprises structured ribs 82, and the collimating lens 65 combined to the component 92, the slide frame 66a combined to the component 93 and the projection lens 67 combined to the component 94 each comprise a contour 98, in particular a V-shaped contour, by means of which a form-fitting interaction with the structured ribs 82 is possible in order to fix the collimating lens 65, the slide frame 66a and the projection lens 67 to be combined to the components 92-94 inside the housing 62.

The ends 99, 99a of the members 92-94 that combine to form the collimating lens 65, the slide mount 66a and the projection lens 67 preferably include different profiles to ensure that the members are accurately assembled (Poka-Yoke, error proofing and error proofing techniques).

Operating parameters of the household appliance 1, for example the nominal temperature thereof, can be entered in particular by means of the sensor device 74.

In order to enable input, for example according to a menu, in the case of the present embodiment, the information content is, for example, related to the current input or current state of the input means 61, or the projection means or slide projector is arranged for changing the projected information content on the basis of the information content corresponding to one of said input areas 29.

The sensor device 74 is provided for detecting the approach of an object, for example a finger of an operator, to an input region projected onto the projection surface 28 or the contact of said object with said input region in order to detect an input into said input device corresponding to the respective input region.

The sensor device 74 comprises in particular a plurality of proximity sensors 75, in particular infrared proximity sensors, arranged next to one another, which are in particular fastened to a printed circuit board 78. In particular, one of the proximity sensors 75 corresponds to each of the sub-slides 91. The signal emitted by the proximity sensor 75 may in the case of the present embodiment pass through a further window 77 of the injection moulding of the housing 62.

Instead of the proximity sensor 75, the sensor device 74 has a plurality of touch keys arranged next to one another, which are arranged in particular below the projection surface 28. The touch keys are provided for recognizing contact of an object with an input area 29 projected onto the projection surface 28 in order to recognize an input into the input device 61 corresponding to the respective input area 29.

The sensor device 74 is provided in particular to adapt the arrangement of the touch buttons to the currently displayed information content in order to control and/or set the household refrigerator 1, in particular in accordance with the displayed information content.

DrawingsTag list

1 domestic refrigeration appliance

2 Heat insulation body

4 refrigerated inner chamber

5 grid plate

6 drawer

7 refrigerating plant

8 electronic control device

20 door panel

20a door panel

21 inner side

22 outside

23 handle groove

24 handle

25 recess

26 covering device

27 flat surface

28 plane of projection

29 display area

30 bag groove

61 input device

62 casing

62a housing cover

63 first housing region

64 second housing region

65 collimating lens

66 slides

66a slide mount

67 projection lens

68 light source

69 LED

70 printed circuit board

71 projection axis

72 deflection mirror

73 window

74 sensor device

75 proximity sensor

77 additional windows

78 printed circuit board

80 surface of

81 Rib

82 structured ribs

91-son slide projector

92-94 structural member

95-97 guide device

98 profile

99, 99a ends.

Claims

1. A household appliance having a hand-operated input device (61) comprising a projection device, which is provided for projecting a plurality of input regions (29) onto a projection surface (28), and a sensor device (74), which is provided for recognizing an approach of an object to an input region (29) projected onto the projection surface (28) or a contact of the object with the input region in order to recognize an input into the input device (61) corresponding to the respective input region (29).

2. The household appliance according to claim 1, wherein the input device (61) comprises a housing (62) in which the projection device and the sensor device (74) are fixed on the housing (62), and/or the sensor device (74) comprises a proximity sensor 75, in particular an infrared proximity sensor.

3. The household appliance according to claim 1 or 2, characterized in that the projected input area (29) comprises projected information content, in particular in the form of letters, logos, symbols and/or images.

4. The household appliance according to claim 3, wherein the information content relates to a current input, and/or the projection means are arranged for changing the information content of the projected input areas (29) based on an input corresponding to one of the input areas (29), in particular to enable input according to a menu.

5. Household appliance according to any one of claims 1 to 4, characterized in that the sensor device (74) comprises a touch key arranged in the region of the projection surface (28) and in particular below the projection surface (28), which touch key identifies a contact of the object with an input region (29) projected onto the projection surface (28) in order to identify an input into the input device (61) corresponding to the respective input region (29).

6. Household appliance according to claims 4 and 5, characterized in that the sensor device (74) is provided for matching the arrangement of the touch keys to the currently displayed information content, in particular in order to be able to control and/or set the household appliance in correspondence to the displayed information content.

7. The household appliance according to any of claims 1 to 6, characterized in that it has: an inner chamber (4); a door panel (20) for opening and closing the interior (4) is provided, said door panel having an inner side (21) facing the interior (4) and an outer side (22) facing away from the interior (4); and a handle recess (23) arranged in the outer side (22) of the door panel (20), the handle recess comprising a handle (24) constituting a side recess with respect to the outer side (22) of the door panel (20), and the slide projector (61) being arranged at least partially in the handle (24).

8. Household appliance according to claims 2 and 7,

the door panel (20) comprises a pocket (30) in the region of the handle (24), which pocket is in particular designed as a rear part and in which a housing (62) with a projection device fixed therein and the sensor device (74) is fixed, and/or

-the housing (62) comprises an opening which is closed with a housing cover (62a), and/or

The housing (62) comprises a first housing region (63) forming the undercut and a second housing region (64) arranged inside the door panel (20) next to the first housing region (63), in particular having a greater depth than the first housing region (63).

9. The household appliance according to claim 7 or 8, wherein the handle groove (23) has a recess (25) which only partially overlaps the handle (24) and which comprises an outwardly directed surface.

10. The household appliance according to claim 9, wherein the door panel (20) comprises a covering device (26) covering the recess (25) and constituting a plane of projection (28) with an outwardly directed surface (27) of the covering device.

11. The household appliance according to any of claims 1 to 10, wherein the projection device is configured as one of the slides, the slide comprising: in particular a light source (68); a collimating lens (65) proximate to the light source (68), the collimating lens converting light generated by the light source (68) into a parallel beam of radiation; a slide (66) next to said collimator lens (65), through which said radiation beam can pass; and a projection lens (67) next to the slide (66) for generating a projection beam from the beam passing through the slide (66).

12. The household appliance according to claims 8 and 11, wherein the light source (68), the slide (66), the collimating lens (65) are arranged inside the second housing area (64), and the projection lens (67) is arranged inside the first housing area (63).

13. Household appliance according to claim 12, characterized in that the slide projector comprises a deflection mirror (72) next to the projection lens (67), which deflects the direction of the projection beam towards the direction of the projection surface (28).

14. Household appliance according to any of claims 11 to 13, characterized in that said slide projector comprises a plurality of sub-slides (91) arranged side by side, said sub-slides each comprising a collimating lens (65), a slide (66) next to the respective collimating lens (65) and a projection lens (67) next to the respective slide (66), said sub-slides (91) each projecting one of said input areas (29) onto said projection surface (28).

15. Method for assembling a household appliance, in particular according to any one of claims 1 to 14, having: an inner chamber (4); a door panel (20) for opening and closing the interior (4) is provided, said door panel having an inner side (21) facing the interior (4) and an outer side (22) facing away from the interior (4); and a handle groove (23) arranged in the outer side (22) of the door panel (20), the handle groove comprising a handle (24) constituting a side recess with respect to the outer side (22) of the door panel (20),

the door panel (20) comprises a pocket (30) in the region of the handle (24), which pocket is in particular designed as a rear part, and the handle groove (23) has a recess (25) which overlaps the handle (24) only in part,

and comprising an input device (61) comprising a projection device and a sensor device (74), the projection device being provided for projecting a plurality of input areas (29) onto a projection surface (28), the sensor device being provided for recognizing an approach of an object to an input area (29) projected onto the projection surface (28) or a contact of the object with the input area in order to recognize an input into the input device (61) corresponding to the respective input area (29), the input device (61) comprising a housing (62) inside which the projection device and the sensor device (74) are fixed on the housing (62), the method having the following steps for assembling a household appliance:

-pushing a housing (62) with a projection device fixed in the housing and the sensor device (74) into the pocket (30), and

-fixing a cover device (26) in the handle recess (23) so as to cover the recess (25), wherein an outwardly directed surface (27) of the cover device (26) constitutes a projection surface.