Lifting device and dishwasher

Abstract

Lifting device (17) for a dishwasher (1), in particular a household dishwasher, comprising an upper dishware holder (11) and a lower dishware holder (10), wherein the lifting device (17) has a drive unit (24) which is configured to move the lower dishware holder (10) between a starting position (P A ) and an end position (P E ) to move by raising or lowering, a sensor device (39) which is configured to detect an actuating force (F1, F2) applied by a user to the upper dishware holder (11), and a control device (25) which is configured to control the drive device (24) to raise or lower the lower dishware holder (10) depending on the detected actuating force (F1, F2) applied by the user to the upper dishware holder (11).

Description

[0001] The present invention relates to a lifting device for a dishwasher and a dishwasher with such a lifting device.

[0002] A dishwasher comprises a wash tub and at least one dish receptacle that can be moved into and out of the wash tub. The dishwasher may have several dish receptacles arranged one above the other, such as a lower basket, an upper basket, or a cutlery basket. Since the lower basket is located near the bottom of the wash tub, loading and unloading the lower basket requires the user to kneel or bend down toward the lower basket.

[0003] DE 10 2013 226 910 A1 describes a lifting device for a dishware holder of a water-conducting household appliance, wherein the dishware holder can be selectively moved into or out of a washing container of the water-conducting household appliance, wherein the lifting device is designed to raise the dishware holder when it is moved out of the washing container and to lower it when it is moved into the washing container, wherein the lifting device has a drive device and a control device, wherein the control device is designed to control the drive device when the dishware holder is moved manually such that the drive device supports the manual movement of the dishware holder with an assisting force.

[0004] Against this background, one object of the present invention is to provide an improved lifting device.

[0005] Accordingly, a lifting device for a dishwasher, in particular a household dishwasher, is proposed. The lifting device comprises an upper dishware receptacle and a lower dishware receptacle, wherein the lifting device has a drive device configured to displace the lower dishware receptacle between a starting position and an end position by raising or lowering it, a sensor device configured to detect an actuating force applied to the upper dishware receptacle, and a control device configured to control the drive device to raise or lower the lower dishware receptacle depending on the detected actuating force.

[0006] The sensor device can be provided on a washing container of the dishwasher, on the upper dishware holder itself, or on a handle of the upper dishware holder. In particular, the control device is configured to control the drive device depending on a change in the actuating force. The actuating force is a manual actuating force. This means that the actuating force is manually applied by a user to the upper dishware holder. The actuating force can be a tensile force or a compressive force. Preferably, the actuating force is applied to the handle of the upper dishware holder. With the aid of the actuating force, the upper dishware holder can be displaced by a displacement path into or out of the washing container of the dishwasher.The displacement path is defined as a distance between the upper dishware receptacle, in particular a rear wall thereof, and a rear wall, in particular an inner side thereof, of the washing compartment. The upper dishware receptacle is provided in the washing compartment of the dishwasher above the lower dishware receptacle. The control device can also be configured to actuate the drive device to raise or lower the lower dishware receptacle when the upper dishware receptacle is manually moved in the washing compartment, depending on the displacement path, in particular depending on a change in the displacement path. The drive device is configured to automatically raise the lower dishware receptacle from the starting position to the end position and to lower it from the end position to the starting position. This means that the lower dishware receptacle is moved without the application of a manual actuating force.Because the lifting device can be operated simply by applying the actuating force to the upper dishware holder, it is not necessary for a user to bend down to the lower dishware holder to operate the lifting device. This increases operating comfort.

[0007] The lifting device preferably further comprises at least one pivot arm which is pivotably attached to the washing container of the dishwasher and to the lower dishware holder. Preferably, four such pivot arms are assigned to the washing container, each arranged in pairs on a respective side of the washing container. In particular, the pivot arms are pivotably arranged on a guide device to which the lower dishware holder is attached. In particular, the drive device is arranged on the at least one pivot arm. The drive device preferably has an output shaft which passes through a side wall of the washing container. A suitable sealing device can be provided between the output shaft and the side wall. The output shaft is connected in a rotationally fixed manner to a bearing point of the pivot arm. Preferably, one such drive device can be provided on each side of the lower dishware holder.Optionally, such a drive device can be provided on each of the swivel arms.

[0008] According to one embodiment, a speed of movement of the lower dishware holder when raising or lowering it is proportional to a change in the actuating force.

[0009] In particular, the movement speed is directly proportional to the change in the actuating force. In particular, the movement speed is also proportional to the change in the displacement path. This means that the greater the actuating force and / or the further the upper dish rack is pushed into or pulled out of the wash tub, the greater the movement speed of the lower dish rack.

[0010] According to a further embodiment, the control device is designed to control the drive device in such a way that the lower dishware holder remains in its current position when the actuating force is removed.

[0011] The upper dish rack can be moved into or out of the wash tub by applying an actuating force, particularly a compressive or tensile force. As soon as the manual actuating force is no longer acting on the upper dish rack, the lower dish rack automatically remains in its current position. This prevents user injury from an unintentional movement of the lower dish rack.

[0012] According to a further embodiment, the control device is configured to control the drive device to raise the lower dishware holder when the upper dishware holder is moved into the washing container. The control device is further configured to control the drive device to lower the lower dishware holder when the upper dishware holder is moved out of the washing container.

[0013] This means that when the upper dishware holder is moved into the washing tub or when the actuating force in the form of a compressive force is applied to the upper dishware holder in the direction into the washing tub, the lower dishware holder is raised and when the upper dishware holder is moved out of the washing tub or when the actuating force in the form of a tensile force is applied to the upper dishware holder in the direction out of the washing tub, the lower dishware holder is lowered.

[0014] According to a further embodiment, the lifting device comprises a sensor device for detecting a displacement path of the upper dishware holder in a washing container of the dishwasher.

[0015] In particular, the sensor device is configured to detect a change in the displacement path. The sensor device can be provided on the washing compartment of the dishwasher. For example, the sensor device can be provided on one of the side walls of the washing compartment.

[0016] According to a further embodiment, the sensor device is configured to detect the displacement path optically, acoustically, magnetically or via a change in an electrical resistance.

[0017] In particular, the sensor device is designed to detect a linear movement of the upper dishware holder in the washing container.

[0018] According to a further embodiment, the sensor device is configured to detect the displacement path as a distance between the upper dishware holder and the washing container.

[0019] In particular, the sensor device is designed to detect a distance between a rear wall of the upper dishware holder and a rear wall of the washing container.

[0020] According to a further embodiment, the lifting device comprises a locking device which is designed to lock the upper dishware holder when raising or lowering the lower dishware holder in such a way that it is locked in the washing container in a linearly immovable manner.

[0021] This ensures that the upper dish rack always remains in the wash tub when the lower dish rack is raised or lowered. This prevents the lower dish rack from colliding with the upper dish rack.

[0022] According to a further embodiment, the locking device is designed to release the upper dishware holder only when the lower dishware holder is in the starting position.

[0023] The position of the lower dish rack can be detected using appropriate sensors. The lower dish rack can only be moved into or out of the wash tub when in its initial position.

[0024] According to a further embodiment, the locking device is designed to couple the upper dishware holder to the washing container in order to lock it.

[0025] In particular, the locking device is configured to positively couple the upper dishware holder to the washing container. The locking device can have a locking element, such as a bolt, which can be displaced by means of a magnetic coil. The locking element can be configured to positively engage an engagement portion provided on the washing container. The locking element can also be, for example, an electromagnet. The locking device is preferably locked or arrested when the displacement path during displacement of the upper dishware holder into the washing container exceeds a lower threshold value. The locking device is preferably unlocked or unlocked when the displacement path exceeds an upper threshold value.

[0026] According to a further embodiment, the lifting device comprises a spring device which is designed to couple the locking device to the upper dishware holder.

[0027] The spring device can be a helical or cylindrical spring. Preferably, the spring device is positioned between the upper dishware holder and the locking device.

[0028] According to a further embodiment, the actuating force for displacing the upper dishware holder in the washing container acts against a spring force of the spring device.

[0029] When lowering the lower dish rack, the manual actuation force acts against the spring force of the spring mechanism, compressing it. When raising the lower dish rack, the manual actuation force acts against the spring force of the spring mechanism, stretching it.

[0030] According to a further embodiment, the drive device comprises a servo motor.

[0031] In particular, the drive device can be a servo motor. This allows for precise control of the drive device, since the servo motor can always transmit the rotational position of its output shaft to the control device.

[0032] According to a further embodiment, the servo motor is arranged in or on a side wall of the dishwasher.

[0033] Preferably, the servomotor is arranged between a side wall of the washing container and the side wall of the dishwasher. In particular, the control device is also positioned on or in the side wall of the dishwasher. This results in a particularly space-saving design of the lifting device.

[0034] Furthermore, a dishwasher, in particular a household dishwasher, with a washing container in which the lower dishware holder and / or the upper dishware holder can be arranged, and with such a lifting device is proposed.

[0035] The lower dishware holder can also be called the lower basket and the upper dishware holder can be called the upper basket.

[0036] Further possible implementations of the lifting device and / or the dishwasher also include combinations of features and embodiments described above or below with respect to the exemplary embodiments that are not explicitly mentioned. In this case, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the lifting device and / or the dishwasher.

[0037] Further advantageous configurations and aspects of the lifting device and / or the dishwasher are the subject of the dependent claims as well as the exemplary embodiments of the lifting device and / or the dishwasher described below. The lifting device and / or the dishwasher are explained in more detail below using preferred embodiments with reference to the accompanying figures. Fig. 1 shows a schematic sectional view of an embodiment of a dishwasher; Fig. 2 shows a further schematic sectional view of the dishwasher according to Fig. 1; Fig. 3 shows a schematic partial sectional view of the dishwasher according to Fig. 1; Fig. 4 shows a schematic partial view of the dishwasher according to Fig. 1; Fig. 5 shows a further schematic partial view of the dishwasher according to Fig. 1; Fig. 6 shows a further schematic partial view of the dishwasher according to Fig. 1; and Fig. 7 shows a further schematic partial view of the dishwasher according to Fig. 1.

[0038] In the figures, identical or functionally equivalent elements have been given the same reference numerals unless otherwise stated.

[0039] The Fig. 1 and Fig. 2 each show a schematic sectional view of an embodiment of a dishwasher 1. The dishwasher 1 is preferably a household dishwasher. The dishwasher 1 has a washing container 2, which can be closed by a door 3, in particular in a watertight manner. For this purpose, a sealing device can be provided between the door 3 and the washing container 2. The washing container 2 and the door 3 can form a washing chamber 4 of the dishwasher 1 for washing dishes. The door 3 is in the Fig. 1 and Fig. 2 is shown in its open position. The door 3 can be closed or opened by pivoting about a pivot axis provided at a lower end of the door 3.

[0040] The washing container 2 has a base 5, a cover 6 arranged opposite the base 5 and a rear wall 7 arranged opposite the door 3. Furthermore, the washing container 2 has two side walls 8, 9 arranged opposite each other. The side wall 9 is in the Fig. 1 and Fig. 2 is only partially shown. The rinsing container 2 is preferably cuboid-shaped. The rinsing container 2 is preferably made of a metal material, in particular of a metal sheet. For example, the rinsing container 2 can be made of a stainless steel sheet. The base 5 can also be made of a plastic material.

[0041] The dishwasher 1 has a lower basket or a lower dishware holder 10. Furthermore, the dishwasher 1 has an upper basket or an upper dishware holder 11. The dishware holders 10, 11 are preferably arranged one above the other in the washing container 2. The upper dishware holder 11 is in the orientation of the Fig. 1 and Fig. 2 is arranged above the lower dishware receptacle 10. The dishware receptacles 10, 11 are preferably box-shaped. The bottoms and walls of the dishware receptacles 10, 11 are grid-shaped. Each dishware receptacle 10, 11 can be moved either into the washing container 2 in an insertion direction E or out of it in a pull-out direction A, opposite to the insertion direction E. A handle 12 can be provided on each of the dishware receptacles 10, 11.

[0042] For this purpose, the washware holders 10, 11 can be moved into or out of the washing container 2 by means of guide devices 13. Fig. 1 and Fig. 2, only the guide device 13 of the lower dishware holder 10 is shown. Preferably, each dishware holder 10, 11 is assigned two such guide devices 13, which are arranged on either side of the dishware holders 10, 11. The dishware holders 10, 11 can each be suspended in the guide devices 13 assigned to them. Each guide device 13 can have a first guide rail 14, a second guide rail 15, and a guide rail 16 arranged between the first guide rail 14 and the second guide rail 15. The lower dishware holder 10 is preferably fastened to and / or suspended in the second guide rail 15. The guide rail 16 is movable relative to the guide rails 14, 15.

[0043] The dishwasher 1 further comprises a lifting device 17 for the lower dishware holder 10. The lifting device 17 is designed to lift the lower dishware holder 10, when it is completely moved out of the washing container 2, from a Fig. 1 shown starting position P A into one in the Fig. 2 shown end position P E This means that the lower dishware holder 10 can only be moved in the starting position P A into or out of the washing container 2. In particular, the lifting device 17 is designed to move the lower dishware holder 10 from the starting position P A to the end position P E to lift and from the end position P E to the starting position P A to lower.

[0044] The lifting device 17 comprises at least a first pivot arm 18 and a pivot arm 19 arranged at a distance from the first pivot arm 18. The pivot arms 18, 19 are each pivotably attached to one of the side walls 8, 9 of the washing container 2 by means of bearing points 20, 21. In particular, the bearing points 20, 21 are fixed bearings. The bearing point 20 is arranged in the vertical direction preferably at the same height as the bearing point 21. The pivot arms 18, 19 are further pivotably attached to the guide device 13 of the lower dishware holder 10 and in particular to the first guide rail 14 by means of bearing points 22, 23. Fig. 1, the pivot arms 18, 19 are positioned vertically. This means that the pivot arms 18, 19 are in the starting position P A the lower dishware holder 10 in a vertical arrangement.

[0045] The lifting device 17 further comprises a Fig. 3 and a control device 25, which can be connected to the drive device 24 via a control line 26. The drive device 24 comprises a servomotor or is designed as a servomotor. Power can also be supplied to the drive device 24 via the control line 26. The drive device 24 can alternatively be driven pneumatically or hydraulically. The drive device 24 and / or the control device 25 are arranged in or on a side wall 27 of a housing 28 of the dishwasher 1. As the Fig. As shown in Figure 3, the drive device 24 and the control device 25 are positioned between the side wall 8 of the washing container 2 and the side wall 27 of the housing 28 of the dishwasher 1. The control device 25 can also be integrated into the drive device 24. This results in a particularly compact design of the lifting device 17.

[0046] The drive device 24 comprises an output shaft 29, which is guided through the side wall 8 of the washing container 2 into the washing chamber 4. A suitable sealing device can be provided between the output shaft 29 and the side wall 8. The output shaft 29 is preferably connected to the first pivot arm 18 at the bearing point 20 of the latter in a rotationally fixed manner, so that the drive device 24 can apply a torque to the first pivot arm 18. Alternatively or additionally, such a drive device 24 can also be provided for the second pivot arm 19. Such drive devices 24 can be provided on both side walls 8, 9 of the washing container 2. The drive device 24 is designed to move the lower dishware holder 10 from the starting position P without any manual assistance. A to the end position P E to lift or from the end position P E to the starting position P A to lower.

[0047] Now returning to the Fig. 1 and Fig. 2, the lifting device 17 further comprises a control lever or drag lever 30. Preferably, one such drag lever 30 is provided on each side of the lower dishware holder 10. The drag lever 30 is rotatably mounted on the washing container 2 and in particular on one of the side walls 8, 9 in each case by means of a bearing point 31. The bearing point 31 is arranged vertically below the bearing points 20, 21 of the pivot arms 18, 19. The drag lever 30 is further mounted on the lower dishware holder 10 by means of a bearing point 32. The drag lever 30 can be configured to lock the lower dishware holder 10 during raising or lowering such that it cannot be displaced into or out of the washing container 2. For this purpose, the drag lever 30 can comprise a locking or locking device.In particular, the rocker arm 30 can be configured to fix the bearing point 32 of the rocker arm 30 provided on the lower dishware holder 10 when raising and lowering the lower dishware holder 10, so that the bearing point 32 can be pivoted relative to the lower dishware holder 10 but cannot be linearly displaced. This means that when raising or lowering the lower dishware holder 10, the bearing point 32 can only be pivoted relative to the lower dishware holder 10. Only in the starting position P. A The bearing point 32 is released, allowing the lower dishware holder 10 to be moved linearly relative to the bearing point 32. The rocker arm 30 is optional.

[0048] The lifting device 17 also comprises a sensor device 33 for detecting a displacement path ΔI ( Fig. 4 to 7), in particular a change in the displacement path ΔI of the upper dishware holder 11 in the washing container 2. The displacement path ΔI is defined as a distance between a rear wall 34 of the upper dishware holder 11 and the rear wall 7 of the washing container 2. The sensor device 33 is designed to detect the displacement path ΔI optically, acoustically, magnetically or by a change in an electrical resistance. For this purpose, the sensor device 33 can have a corresponding sensor or a plurality of sensors which are designed to convert a change in the displacement path ΔI into an electrical signal that can be processed by the control device 25. For this purpose, the sensor device 33 is operatively connected to the control device 25 such that the drive device 24 can be controlled as a function of the displacement path ΔI. The sensor device 33 can be provided on the washing container 2.For example, the sensor device 33 can be provided on the side wall 8. Several sensor devices 33 can be provided.

[0049] The lifting device 17 further comprises a locking or locking device 35, which is designed to lock the upper dishware holder 11 when raising or lowering the lower dishware holder 10 such that the upper dishware holder 11 is locked in the washing container 2 in a linearly immovable manner, so that it can only be displaced slightly in the extension direction A and in the insertion direction E to operate the lifting device 17. In particular, the locking device 35 is designed to release the upper dishware holder 11 only when the lower dishware holder 10 is in the starting position P AThe locking device 35 can comprise a locking element 36. The locking device 35 is configured to electromechanically lock the upper dishware holder 11 in the washing compartment 2. For example, the locking device 35 can have a magnetic coil configured to displace the locking element 36, which can be a bolt, for example, in order to bring it into positive engagement with an engagement portion provided on the rear wall 7 of the washing compartment 2. The locking element 36 can also be an electromagnet configured to firmly couple the locking device 35 to the rear wall 7.

[0050] The lifting device 17 further comprises a spring device 37 that couples the locking device 35 to the upper dishware holder 11. For example, the spring device 37 can be a cylindrical spring. The spring device 37 is arranged between the rear wall 34 of the upper dishware holder and a rear wall 38 of the locking device 35. For example, the spring device 37 can be permanently mounted to the rear walls 34, 38.

[0051] The functionality of the lifting device 17 is explained below using the Fig. 1 to 7, to which reference is also made. To move the lower dishware holder 10 from the starting position P A to the end position P E the lower dishware holder 10 is first completely moved out of the washing container 2 so that the lower dishware holder 10 is in the starting position P AWhether the lower dishware holder 10 has been completely displaced from the washing tub 2 can be determined with the aid of appropriate sensors. The control device 25 is now configured to actuate the drive device 24 to raise or lower the lower dishware holder 10 upon manual displacement of the upper dishware holder 11 in the washing tub 2, depending on a manual actuating force F1, F2 acting on the upper dishware holder 11 and / or the displacement path ΔI.

[0052] A first manual actuating force F1, in particular a pressure force, is first applied to the upper dishware holder 11 moved into the washing container 2 ( Fig. 4). The actuating force F1 acts in the direction of the rear wall 7. Here, the locking device 35 is still arranged at a distance from the rear wall 7 of the washing container 2 and the upper dishware holder 11 is not yet locked in the washing container 2. The locking device 35 is not locked. The unlocked state of the locking device 35 is represented by the locking element 36 being shown as an unfilled circle. By applying the actuating force F1, the upper dishware holder 11 is displaced further into the washing container 2 until the locking device 35 contacts the rear wall 7 ( Fig. 5). The locking device 35 is still not locked.

[0053] By further moving the upper dishware holder 11 into the washing tub 2, the spring device 37 is compressed and the displacement path ΔI is reduced. In this case, the actuating force F1 acts against a spring force of the spring device 37. As soon as, as shown in the Fig. 6, a lower threshold value of the displacement path ΔI is undershot, the locking device 35 is activated and the locking element 36 couples the locking device 35 to the rear wall 7 of the washing container 2. The locked state of the locking device 35 is represented by the locking element 36 being shown as a filled circle. In addition, as soon as the locking device 35 is locked, the drive device 24 is controlled by means of the control device 25, so that the lower dishware holder 10 is moved from the initial position P A to the end position P E is raised.

[0054] The smaller the displacement path ΔI and / or the greater the actuating force F1, the greater the movement speed when lifting the lower dishware holder 10. As a prerequisite for locking the upper dishware holder 11 and activating the drive device 24, the lower dishware holder 10 must be fully extended. This is ensured by the sensors described above. As soon as the actuating force F1 is no longer applied to the upper dishware holder 11, the lower dishware holder 10 remains in its current position. For this purpose, a locking device, for example a self-locking worm gear associated with the drive device 24, can be provided to lock the lower dishware holder 10.

[0055] If the locked upper dishware holder 11 is used, as shown in the Fig.7, a second manual actuating force F2 directed away from the rear wall 7, in particular a tensile force, is applied and an upper threshold value of the displacement path ΔI is exceeded, the lower dishware holder 10 is moved from the end position P E to the starting position P A As soon as the lower dishware holder 10 reaches the starting position P A has been reached, the locking device 35 is unlocked or released, so that the upper dishware holder 11 is no longer locked in the washing container 2 and can be moved out of it. If, as long as the upper dishware holder 11 is locked, no actuating force F1, F2 is exerted on it, the drive device 24 is deactivated and the lower dishware holder 10 remains in its current position. For this purpose, the drive device 24 can comprise the aforementioned self-locking worm gear.

[0056] The lifting device 17 further comprises a sensor device 39 for directly detecting the actuating force F1, F2. The sensor device 39 can be provided on the washing container 2, the upper dishware receptacle 11, or on the handle 12 of the upper dishware receptacle 11. Preferably, the sensor device 39 is operatively connected to the handle 12, so that the actuating force F1, F2 can be detected as soon as it is applied to the handle 12. The sensor device 39 can be referred to as the first sensor device 39 and the sensor device 33 can be referred to as the second sensor device 33. The lifting device 17 can comprise both sensor devices 33, 39 or only one of the sensor devices 33, 39.

[0057] Compared to known solutions, the lifting device 17 has the advantage that a user does not have to bend down to the lower dishware holder 10 to operate the lifting device 17. The lifting device 17 is always operated at the upper dishware holder 11, regardless of the position of the lower dishware holder 10. In particular, the lifting device 17 is operated using the handle 12 of the upper dishware holder 11. Furthermore, it is not necessary to attach additional buttons or sensor fields to the dishwasher 1 for operating the lifting device 17. Since the lifting device 17 can only be activated to raise or lower the lower dishware holder 10 when the upper dishware holder 11 is completely located in the washing tub 2, a collision between the lower dishware holder 10 and the upper dishware holder 11 is ruled out.Furthermore, no data and / or energy transmission into the rinsing chamber 4 of the rinsing container 2 is required.

[0058] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. Reference symbols used: 1 dishwasher 2 rinsing containers 3 Door 4 rinsing chamber 5 Floor 6 blanket 7 Rear wall 8 Side wall 9 Side wall 10 Dishwasher holder 11 Dishwasher drawer 12 Handle 13 Guide device 14 Guide rail 15 Guide rail 16 guide rail 17 Lifting device 18 Swivel arm 19 Swivel arm 20 storage location 21 storage location 22 storage location 23 storage location 24 drive device 25 Control device 26 Control line 27 Side wall 28 housings 29 Output shaft 30 rocker arms 31 storage location 32 storage location 33 Sensor device 34 Rear wall 35 Locking device 36 Locking element 37 Spring device 38 Rear wall 39 Sensor device A Extension direction E Insertion direction F1 actuation force F2 actuation force P A Starting position P E Final position ΔI displacement path

Claims

[1] Lifting device (17) for a dishwasher (1), in particular a household dishwasher, comprising an upper dishware holder (11) and a lower dishware holder (10), wherein the lifting device (17) has a drive device (24) which is designed to move the lower dishware holder (10) between a starting position (P A ) and an end position (P E ) by means of raising or lowering, a sensor device (39) which is designed to detect an actuating force (F1, F2) applied by a user to the upper dishware holder (11), and a control device (25) which is designed to control the drive device (24) for raising or lowering the lower dishware holder (10) as a function of the detected actuating force (F1, F2) applied by the user to the upper dishware holder (11). [2] Lifting device according to claim 1, characterized bythat a speed of movement of the lower dishware holder (10) when raising or lowering it is proportional to a change in the actuating force (F1, F2). [3] Lifting device according to claim 1 or 2, characterized by that the control device (25) is designed to control the drive device (24) in such a way that the lower dishware holder (10) remains in its current position when the actuating force (F1, F2) is removed. [4] Lifting device according to one of claims 1-3, characterized bythat the control device (25) is designed to control the drive device (24) to raise the lower dishware holder (10) when the upper dishware holder (11) is moved into the washing container (2), and that the control device (25) is designed to control the drive device (24) to lower the lower dishware holder (10) when the upper dishware holder (11) is moved out of the washing container (2). [5] Lifting device according to one of claims 1-4, characterized by a sensor device (33) for detecting a displacement path (ΔI) of the upper dishware holder (11) in a washing container (2) of the dishwasher (1). [6] Lifting device according to claim 5, characterized by that the sensor device (33) is designed to detect the displacement path (ΔI) optically, acoustically, magnetically or via a change in an electrical resistance. [7] Lifting device according to claim 5 or 6, characterized by that the sensor device (33) is designed to detect the displacement path (ΔI) as a distance between the upper dishware holder (11) and the washing container (2). [8] Lifting device according to one of claims 1-7, characterized by a locking device (35) which is designed to lock the upper dishware holder (11) when the lower dishware holder (10) is raised or lowered in such a way that it is locked in the washing container (2) in a linearly immovable manner. [9] Lifting device according to claim 8, characterized by that the locking device (35) is designed to release the upper dishware holder (11) only when the lower dishware holder (10) is in the starting position (P A ) is located. [10] Lifting device according to claim 8 or 9, characterized bythat the locking device (35) is designed to couple the upper dishware holder (11) to the washing container (2) in order to lock it. [11] Lifting device according to one of claims 8-10, characterized by a spring device (37) which is designed to couple the locking device (35) to the upper dishware holder (11). [12] Lifting device according to claim 11, characterized by , the actuating force (F1, F2) for displacing the upper dishware holder (11) in the washing container (2) acts against a spring force of the spring device (37). [13] Lifting device according to one of claims 1-12, characterized by that the drive device (24) has a servo motor. [14] Lifting device according to claim 13, characterized by that the servo motor is arranged in or on a side wall (27) of the dishwasher (1). [15] Dishwasher (1), in particular a household dishwasher, with a washing container (2) in which the lower dishware holder (10) and / or the upper dishware holder (11) can be arranged, and a lifting device (17) according to one of claims 1-14.

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