Lifting system for a household dishwasher or furniture

Abstract

Lifting system (200), comprising a lifting device (15) and a lower dishware holder (12) which can be acted upon by the lifting device (15) for a household dishwasher (1) comprising a washing container (2) or a lower storage element (104) which can be acted upon by the lifting device (15) for a piece of furniture (100) comprising a carcass (101), - wherein the lifting device (15) is designed to lift the lower dishware holder (12) or the lower storage element (104) from a starting position (AP) to an end position (EP) or to lower it from the end position (EP) to the starting position (AP), - wherein the lifting device (15) has an actuating lever (34) for actuating the same, - wherein a locking device (45, 46) is provided which is designed to lock the lifting device (15) in a plurality of intermediate positions between the end position (EP) and the starting position (AP), and - wherein the locking device (45, 46) is arranged at a pivot point (39) of the actuating lever (34) provided on the lower dishware holder (12) or on the lower storage element (104).

Description

[0001] The present invention relates to a lifting system comprising a lifting device and a lower dishware holder which can be acted upon by the lifting device for a household dishwasher comprising a washing container or a lower storage element which can be acted upon by the lifting device for a piece of furniture comprising a carcass.

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

[0003] A piece of furniture comprises a body and at least one storage element that can be moved into or out of the body, for example, a container, a wire basket, a shelf, or a drawer. In particular, there may be several storage elements arranged one above the other. Since a storage element is located near a base of the body, loading or unloading the storage element requires the user to kneel or bend down toward the storage element.

[0004] The publication DE 10 2015 102 500 A1 discloses a sliding and lifting mechanism for a shelf of a piece of furniture or a household appliance, comprising a scissor mechanism for extending the shelf from a body of the furniture or household appliance and for lifting the shelf. The sliding and lifting mechanism has a knee joint coupled to the scissor mechanism and locking the shelf in a raised position. The knee joint can be formed by a pivot lever and a knee lever, wherein the pivot lever is pivotably connected to the shelf by a user, and the knee lever is coupled to the scissor mechanism.

[0005] Furthermore, the scissor mechanism can be formed by at least two crossed and rotatably connected scissor levers, each of which is rotatably connected or rotatably and displaceably connected to the shelf at one end. The toggle lever can also be hinged to one of the scissor levers. The sliding and lifting mechanism can be implemented, for example, in a piece of furniture or a household appliance with a body and a shelf, wherein the shelf can be pulled out of the furniture body and lifted via the sliding and lifting mechanism.

[0006] The document DE 20 2009 004 771 U1 discloses a device for adjusting the height of a shelf guided in a household appliance via at least one pull-out guide, comprising at least one guide rail on which a shelf can be guided and pulled out in a pull-out direction, a height adjustment mechanism which can be fixed to opposite side walls of the household appliance, wherein the height adjustment mechanism has two arms which are rotatably fixed to each of the side walls with a first end parallel to the plane of the side walls and arranged parallel and spaced from one another, and wherein two guide rails can be rotatably fixed to respective second ends of the arms parallel to the plane of the side walls in such a way that the guide rails can be raised from a lower position in the household appliance to an upper position at least partially in front of the household appliance.An energy storage device can be attached to at least one of the opposite side walls of the household appliance, which energy storage device is operatively connected to one of the arms attached to this side wall in such a way that the energy stored in the energy storage device can support a raising or lowering of the guide rails. A side wall bracket can be attached to at least one of the opposite side walls of the household appliance, to which the arms and the energy storage device of the height adjustment mechanism are attached at a first end. A guide can also be provided on the side of the side wall bracket facing away from the side wall of the household appliance, in which guide a guide element protruding from a head piece of one of the arms can be guided. Furthermore, a locking element can be provided in at least one end region of the guide, with which the arm and thus the entire height adjustment mechanism can be locked in an end position.

[0007] EP 2 818 092 A1 discloses a lifting device for a lower basket of a dishwasher. With the aid of the lifting device, the lower basket can be moved from a lower position to an upper position and vice versa. An actuating element is provided on the lower basket, with the aid of which the lower basket can be unlocked in its upper position, whereby it is automatically moved to the lower position by its own weight and / or the weight of the items to be washed within it.

[0008] The document DE 20 2014 010 365 U1 discloses a dishwasher with a lifting unit, by means of which a washing basket accommodated in a treatment chamber of the dishwasher can be lifted from a washing level of the treatment chamber to a level above the washing level.

[0009] The document WO 2015 / 154906 A1 discloses a dishwasher with a lifting device which is designed to lift a lower basket of the dishwasher from a lower position to an upper position.

[0010] The document EP 1 066 789 B1 discloses a dishwasher with a lifting device for lifting a lower basket of the dishwasher, wherein the lifting device has rollers which roll on an inner side of an open door of the dishwasher when the lower basket is pulled out of a washing container of the dishwasher.

[0011] The publication WO 2016 / 050526 A1 discloses a sliding / pivoting mechanism for a shelf of a household appliance for extending and lifting the shelf from a body of the household appliance. The sliding / pivoting mechanism comprises a pivoting mechanism with pivot arms, wherein a guide rail of a sliding mechanism is pivotably mounted parallel to a plane of the side walls at respective second ends of the pivot arms such that the guide rail can be pivoted from a lower position within the body to a raised, upper position at least partially outside the body. At least one guide rail, which is linearly displaceable in the guide rail, is fastened to the shelf, and wherein the sliding / pivoting mechanism has a lever unit that supports raising and lowering the pivoting mechanism.

[0012] Against this background, it is an object of the present invention to provide an improved lifting system for a dishware holder of a household dishwasher or a storage element of a piece of furniture.

[0013] Accordingly, a lifting system comprising a lifting device and a lower dishware holder which can be acted upon by the lifting device for a household dishwasher comprising a washing container or a lower storage element which can be acted upon by the lifting device for a piece of furniture comprising a carcass is proposed, - wherein the lifting device is designed to raise the lower dishware holder or the lower storage element from a starting position to an end position or to lower it from the end position to the starting position, - wherein the lifting device has an actuating lever for actuating the same, - wherein a locking device is provided which is designed to lock the lifting device in a plurality of intermediate positions between the end position and the starting position, and - wherein the locking device is arranged at a pivot point of the actuating lever provided on the lower dishware holder or on the lower storage element.

[0014] The locking device allows a number of intermediate positions to be reached between the end position and the starting position. This prevents the lower dishware holder or the lower storage element from moving downwards in an uncontrolled manner when being moved from the end position to the starting position. This greatly reduces the risk of injury to the user. The lifting height can be set to any number of intermediate positions between the end position and the starting position. This makes loading the lower dishware holder or the lower storage element easier. Defects in the lifting device can be prevented by preventing uncontrolled movement of the lower dishware holder or the lower storage element.Furthermore, damage to the dishwasher, for example, its wash tub, or to the cabinet, such as the body, can be prevented. The risk of damage to the items being washed or to the items placed in or on the storage element is also minimized.

[0015] The pivot point can also be referred to as a rotation axis. The pivot point can comprise a bolt or be designed as a bolt on which the actuating lever is rotatably mounted. In particular, such a pivot point is provided on both sides of the lower dishware holder or the lower storage element. Preferably, two such locking devices are provided, which are provided in particular on both sides of the lower dishware holder or the lower storage element. The locking devices can be permanently mounted on the lower dishware holder or the lower storage element. As a result, the lower dishware holder or the lower storage element can be separated from the locking devices.This means that the fact that the locking device is arranged at the pivot point of the operating lever provided on the lower dishware holder or the lower storage element does not necessarily mean that the locking device is firmly connected to the lower dishware holder or the lower storage element.

[0016] The operating lever preferably has a handle and two lever arms arranged on either side of the handle, which are rotatably mounted on pivot points preferably provided on either side of the lower dishware holder or the lower storage element. This means that the operating lever is mounted on the two pivot points with the help of the two lever arms. The preferably two locking devices are also provided at these pivot points. The locking device can also be referred to as a latching device, ratchet device, or rotary ratchet. The locking device is preferably designed to lock the lifting device in a plurality of intermediate positions between the starting position and the end position both when the lower dishware holder or the lower storage element is raised and when it is lowered. For example, five, ten, or even more intermediate positions can be provided.

[0017] According to one embodiment, the locking device comprises a toothed segment that is immovable relative to the lower dishware holder or the lower storage element and a toothed element that is coupled to an operating element of the actuating lever and that positively engages in the toothed segment to lock the lifting device, wherein the operating element is preferably rotatably mounted on the actuating lever.

[0018] A positive connection is created by the interlocking or engagement of at least two connection partners, in this case the toothed element and the toothed segment. Each locking device preferably has a base plate which is either permanently mounted on the lower dishware holder or the lower storage element or is fastened to the previously described receiving device for the lower dishware holder or the lower storage element. The toothed segment is provided on the base plate. The base plate can also be formed integrally with the toothed segment. The toothed segment preferably comprises any desired number of teeth. The toothed element preferably also comprises teeth which are formed to correspond to the teeth of the toothed segment. For example, the toothed element comprises four such teeth.The number of intermediate positions can be determined by the number and pitch of the teeth of the toothed segment and the toothed element. The operating element is preferably strip-shaped and arranged parallel to the handle of the operating lever. The operating element is coupled to the respective toothed element of the locking device, in particular by means of lever arms rotatably mounted on the lever arms of the operating lever. The toothed element is preferably rotatably mounted relative to the pivot point of the operating lever provided on the lower dishware holder or the lower storage element.

[0019] In particular, the lever arms of the control element can be rotatably mounted on the lever arms of the actuating lever. This allows the control element to perform a rotational movement relative to the handle of the actuating lever.

[0020] According to a further embodiment, the tooth element is spring-loaded in the direction of the tooth segment.

[0021] For this purpose, a spring element, such as a compression spring or a leaf spring, can be provided. The spring element presses the counter-toothing of the toothed element into the toothing of the toothed segment.

[0022] According to a further embodiment, by actuating the operating element, the tooth element can be brought out of positive engagement with the tooth segment against the spring preload.

[0023] This means that when the control element is actuated, it must be moved against the spring preload of the spring element to disengage the toothed element from the toothed segment. Once the toothed element is disengaged from the toothed segment, the lower dishware holder or lower storage element can be moved further toward its original position.

[0024] According to a further embodiment, the locking device comprises a guide element on or in which the tooth element is linearly guided.

[0025] This means that the toothed element can perform a linear movement relative to the guide element. For this purpose, the toothed element preferably has an elongated hole through which, for example, a bolt mounted at the pivot point of the actuating lever is passed. The guide element is also rotatably mounted at the pivot point of the actuating lever provided on the lower dishware holder or on the lower storage element. This means that when the lower dishware holder or the lower storage element is moved from the starting position to the end position, or vice versa, the toothed element rotates together with the guide element relative to the fixed toothed segment.

[0026] According to a further embodiment, the toothed element is rotatably movable relative to the toothed segment when the lower dishware holder or the lower storage element is raised from the starting position to the end position or when the lower dishware holder or the lower storage element is lowered from the end position to the starting position.

[0027] This means that the teeth of the toothed element preferably move in a circular path. The guide element preferably moves along with the toothed segment.

[0028] According to a further embodiment, the toothed segment has a toothing and the toothed element has a counter-toothing corresponding to the toothing.

[0029] The toothing of the toothed segment is designed to engage positively with the mating toothing of the toothed element, or vice versa. Preferably, the mating toothing has fewer teeth than the toothing.

[0030] According to a further embodiment, teeth of the gearing are arranged in a circular arc.

[0031] In particular, the teeth of the gearing are positioned on a circular arc. The teeth can, for example, form a quarter circle. The teeth can also form a semicircle or the like.

[0032] According to a further embodiment, the toothing and the counter-toothing are designed such that when the lower storage element is lifted from the starting position to the end position, teeth of the counter-toothing automatically skip teeth of the toothing without actuation of the operating element.

[0033] In particular, the teeth of the gearing and the teeth of the counter-gearing are arranged at an angle. This allows the lower storage element to be raised from its starting position to its end position without the control element being activated. The locking mechanism then engages automatically.

[0034] According to a further embodiment, the teeth of the counter-toothing and / or the teeth of the toothing are formed asymmetrically.

[0035] In particular, the teeth of the counter-toothing and the teeth of the toothing are arranged obliquely. Preferably, the teeth of the counter-toothing and the teeth of the toothing are oriented in the same way.

[0036] According to a further embodiment, the toothing and the counter-toothing are designed such that when the lower dishware holder or the lower storage element is lowered from the end position to the starting position, teeth of the counter-toothing can only be brought out of positive engagement with teeth of the toothing by means of an actuation of the operating element.

[0037] This means that when the lower dishware holder or the lower storage element is moved from the end position to the starting position, the teeth of the counter-toothing system do not automatically jump over the teeth of the toothing system. This ensures that when the control element is released, the lower dishware holder or the lower storage element is locked in any intermediate position between the starting position and the end position.

[0038] According to a further embodiment, the lifting system comprises a guide device with the aid of which the lifting device together with the lower dishware holder can be moved out of the washing container or together with the lower storage element out of the body or into it.

[0039] In particular, the lifting device and the lower dishware holder or the lower storage element can only be moved out of or into the washing container or the body in the starting position. The guide device is in particular a so-called telescopic rail with a first guide rail fastened to the washing container or the body, a second guide rail on which the lifting device is arranged, and a third guide rail arranged between the first guide rail and the second guide rail. Preferably, two such guide devices are provided, which are arranged on opposite side walls of the washing container or the body.

[0040] According to a further embodiment, the lifting device comprises a scissor lifting system for raising the lower dishware holder or the lower storage element from the starting position to the end position and for lowering the lower dishware holder or the lower storage element from the end position to the starting position. The scissor lifting system preferably has a drive element, in particular a spring. The scissor lifting system can, for example, comprise a scissor lifting table.

[0041] The scissor lifting system preferably comprises two lever arms arranged on either side of the lower storage element, which are pivotably connected to each other at a pivot point. The scissor lifting system makes the lifting movement of the lifting device particularly simple and convenient.

[0042] The drive element can also be an electric motor, a gas spring, a pneumatic or hydraulic cylinder, or the like. Preferably, the drive element is designed such that it only supports the lifting of the lower dishware holder or the lower storage element from the starting position to the end position, but does not completely take over.

[0043] Furthermore, a household dishwasher or a piece of furniture can also be equipped with the lifting system described above.

[0044] Further possible implementations of the lifting system also include combinations of features or 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 system.

[0045] Further advantageous embodiments and aspects of the lifting system are the subject of the dependent claims and the exemplary embodiments of the lifting system described below. The lifting system is explained in more detail below using preferred embodiments with reference to the attached figures.

[0046] It shows Fig. 1 is a schematic perspective view of a preferred embodiment of a household dishwasher; Fig. 2A is a schematic side view of the household dishwasher according to Fig. 1; Fig. 2B is a further schematic side view of the household dishwasher according to Fig. 1; Fig. 3A is a schematic side view of a preferred embodiment of a piece of furniture; Fig. 3B is a further schematic side view of a preferred embodiment of the furniture according to Fig. 3A; Fig. 4 a schematic perspective view of a preferred embodiment of a lifting device of a lifting system for the household dishwasher according to Fig. 1; Fig. 5 a schematic and perspective partial sectional view of the lifting device of the lifting system according to Fig. 4; Fig. 6 a schematic partial side view of the lifting device of the lifting system according to Fig. 4; Fig. 7 the detailed view VII according to Fig. 6; Fig. 8 a further schematic partial side view of the lifting device of the lifting system according to Fig. 4; Fig. 9 the detailed view IX according to Fig. 4; Fig. 10 is a schematic side view of a preferred embodiment of an actuated lifting device of the lifting system for a piece of furniture in an end position; and Fig. 11 a schematic side view of the unactuated lifting device of the lifting system for a piece of furniture according to Fig. 10 in a final position.

[0047] In the figures, identical or functionally identical elements have been given the same reference numerals unless otherwise stated.

[0048] The Fig. 1 shows a schematic perspective view of an embodiment of a household dishwasher 1. The household dishwasher 1 comprises 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 is preferably cuboid-shaped. The washing container can be arranged in a housing of the household dishwasher 1. The washing container 2 and the door 3 can form a washing chamber 4 for washing dishes.

[0049] Door 3 is in the Fig. 1 in its open position. The door 3 can be closed or opened by pivoting about a pivot axis 5 provided at a lower end of the door 3. With the help of the door 3, a loading opening 6 of the washing container 2 can be closed or opened. The washing container 2 has a base 7, a ceiling 8 arranged opposite the base 7, a rear wall 9 arranged opposite the closed door 3 and two side walls 10, 11 arranged opposite one another. The base 7, the ceiling 8, the rear wall 9 and the side walls 10, 11 can be made, for example, from a stainless steel sheet. Alternatively, the base 7 can be made, for example, from a plastic material.

[0050] The household dishwasher 1 further comprises at least one dishware receptacle 12 to 14. Preferably, several, for example three, dishware receptacles 12 to 14 can be provided, wherein the dishware receptacle 12 can be a lower dishware receptacle or a lower basket, the dishware receptacle 13 can be an upper dishware receptacle or an upper basket, and the dishware receptacle 14 can be a cutlery drawer. Fig. 1 further shows, the dishware receptacles 12 to 14 are arranged one above the other in the washing container 2. Each dishware receptacle 12 to 14 can be selectively moved into or out of the washing container 2. In particular, each dishware receptacle 12 to 14 can be pushed into the washing container 2 in an insertion direction E (arrow) and pulled out of the washing container 2 in a pull-out direction A (arrow) opposite to the insertion direction E (arrow). The lower dishware receptacle 12 can also be lifted by a lifting device to be explained later from an initial position to an end position in which it is preferably arranged in front of the upper dishware receptacle 13 and at the same height as the latter.

[0051] The Fig. 2A and Fig. 2B each show a schematic side view of the household dishwasher 1 according to Fig. 1. The household dishwasher 1 is provided with a lifting system 200 comprising a lifting device 15. The lifting device 15 is configured to raise the lower dishware holder 12 from a starting position AP to an end position EP when the door 3 is open, or to lower it from the end position EP to the starting position AP. The lifting device 15 comprises, for example, a scissor-type lifting system 16 with a plurality of interconnected lever arms 17, 18. For example, two lever arms 17, 18 or even more than two lever arms 17, 18 may be provided. The lever arms 17, 18 are pivotably connected to one another at a pivot point 19.

[0052] At an end section facing the lower dishware receptacle 12, the lever arms 17, 18 are detachably connected to the lower dishware receptacle 12. For example, a frame-shaped receiving device can be provided for this purpose, into which the lower dishware receptacle 12 can be inserted or snapped, for example. Preferably, one of the two lever arms 17, 18 is rotatably connected to the lower dishware receptacle 12 or to the receiving device, and the second of the two lever arms 17, 18 is rotatably and linearly displaceably connected to the lower dishware receptacle 12 or to the receiving device.

[0053] The household dishwasher 1 further comprises a guide device 20, which can be attached both to the washing container 2 and to the lifting device 15, and with the aid of which the lower dishware holder 12, when it is in the starting position AP, together with the lifting device 15 of the lifting system 200, can be moved into or out of the washing container 2. The guide device 20 is in particular a so-called telescopic rail, which can have a first guide rail connected to the washing container 2, a second guide rail connected to the lifting device 15, and a third guide rail movably mounted between the first guide rail and the second guide rail. Preferably, two such guide devices 20 are provided, which are attached to the two opposite side walls 10, 11 ( Fig. 1) of the rinsing container 2.

[0054] The Fig. 3A and Fig. 3B each show a schematic side view of a piece of furniture 100.

[0055] The Fig. The piece of furniture 100 shown in Figure 3A comprises a body 101 with two side walls 102, only one of which is shown, and with two storage elements 103, 104, wherein the upper storage element 103 is designed as a drawer and the lower storage element 104 as a container arranged in a sliding element 106. A different number of storage elements is possible. Furthermore, a guide device 105 is provided, by means of which the storage element 103, 104 can be displaced directly or indirectly via the sliding element 106 in an insertion direction E (arrow) into the body 101 or out of the body 101 in an extension direction A (arrow) opposite the insertion direction E (arrow).The guide device 105 is, in particular, a so-called telescopic rail, which can have a first guide rail connected to the body, a second guide rail connected to the storage element 103 or to the sliding element 106, and a third guide rail movably mounted between the first guide rail and the second guide rail. Preferably, two such guide devices 105 are provided, which are attached to the two opposite side walls 102 of the body 101.

[0056] In the Fig. 3A, the lower storage element 104 is shown in the open position. In this case, the storage element 104 is arranged in a sliding element 106, to which the guide devices 105 are attached, and has the shape of a container. The storage element 104 can be lifted by a lifting system (200) according to the invention, which comprises a lifting device 15, from a starting position AP to an end position EP, in which it is preferably arranged in front of the upper storage element 103 and at approximately the same height as the latter. This position is shown in Fig. 3B is shown schematically.

[0057] The structure and functioning of the lifting system 200 including the lifting device 15 is identical to the lifting system 200 of a household dishwasher 1 described in the following figures. The lifting device 15 comprises, for example, a scissor lifting system 16 with a plurality of interconnected lever arms 17, 18. For example, two lever arms 17, 18 or more than two lever arms 17, 18 can be provided. The lever arms 17, 18 are pivotally connected to one another at a pivot point 19. The existing actuating lever is not shown in this view. The lever arms 17, 18 are preferably detachably connected to the pushing element 106 and to the storage element 104. Preferably, one of the two lever arms 17, 18 is rotatably connected to the storage element 104, while the second of the two lever arms 17, 18 is arranged on the storage element 104 so as to be rotatable and linearly displaceable.

[0058] Alternatively, in the case of a storage element, in particular a drawer, a container, a wire basket or a shelf, in a piece of furniture, the lifting device 15 can be arranged directly on the guide device 105 as in the case of the household dishwasher 1 and the lifting device 15 is preferably detachably connected to the storage element, as shown in the Fig. 10 and Fig. 11. In most cases, the furniture 100 does not have a door pivotable about a horizontal axis. The front cover of the furniture 100 is generally formed by the fronts of the storage elements 103, 104 or by a door pivotable about a vertical axis, behind which the storage elements 103, 104 are arranged. In this case, too, the structure and functioning of the lifting system 200 including the lifting device 15 are identical to the following embodiment with the household dishwasher 1.

[0059] The Fig. 4 shows a schematic perspective view of the lower dishware holder 12 with the lifting system 200, the lifting device 15 and the guide devices 20. The Fig. 5 shows a schematic and perspective partial sectional view of the lower dishware holder 12 with the lifting system 200, the lifting device 15 and the guide devices 20.

[0060] As the Fig. 4 and Fig. 5, the two guide devices 20 each comprise, as previously mentioned, a first guide rail 21, which is fixedly connected to the washing container 2, a second guide rail 22, on which the lifting device 15 of the lifting system 200 is movably displaceable, and a third guide rail 23, which is arranged between the first guide rail 21 and the second guide rail 22. On an end section 24 of the lever arm 17 facing the second guide rail 22, a roller 25 is provided, which is designed to run on the inside of the opened door 3 ( Fig. 2A and Fig. 2B). This allows the door 3 to absorb forces resulting from loading the lower dishware holder 12, so that the guide devices 20 can be relieved. Preferably, two lever arms 17, 18 are provided on each side of the lower dishware holder 12, with both lever arms 17 having such a roller 25. The rollers 25 are connected to one another by a cross strut 26.

[0061] The respective end section 24 of the lever arms 17 is preferably displaceable relative to the second guide rail 22. An end section 27 of the lever arm 18 is preferably also displaceable relative to the second guide rail 22. The end section 27 can also be immovable on the second guide rail 22. The lever arm 17 is rotatably attached by an end section 28 at a pivot point 29 to the lower dishware holder 12 or to the receiving device provided for the lower dishware holder 12. An end section 30 of the lever arm 18 is rotatably attached to a pivot axis 31 to the lower dishware holder 12 or to the receiving device for the lower dishware holder 12. Furthermore, the end section 30 is linearly displaceable relative to the lower dishware holder 12 or the receiving device for the lower dishware holder 12.For this purpose, a guide rail 32 can be provided on the lower dishware holder 12 or on the receiving device for the lower dishware holder 12. The scissor lifting system 16 can further comprise a drive element 33, for example a spring.

[0062] The lifting device 15 of the lifting system 200 comprises an actuating lever 34 for actuating the lifting device 15. The actuating lever 34 comprises a handle 35 and an operating element 36 that is displaceable relative to the handle 35. The operating element 36 can be a so-called impact bar. The handle 35 is coupled to the scissor lifting system 16 by lever arms 37, 38 provided on both sides of the lower dishware holder 12. The actuating lever 34 is rotatably mounted on the lower dishware holder 12 or on the receiving device for the lower dishware holder 12 by means of a pivot point 39. In particular, the lever arms 37, 38 are rotatably mounted on the lower dishware holder 12 or on the receiving device for the lower dishware holder 12 by means of the pivot point 39. For this purpose, a bolt and a corresponding bearing can be provided at the pivot point 39.By means of a further pivot point 40, the lever arms 37, 38 are each connected to a lever arm 41 of the scissor lifting system 16. The lever arm 41 is, for example, firmly connected to the respective lever arm 17 of the scissor lifting system 16. The operating element 36 comprises lever arms 42, 43 provided on both sides of the lower dishware holder 12, which are rotatably mounted on the lever arms 37, 38 at a respective pivot point 44.

[0063] The lifting device 15 of the lifting system 200 is preferably assigned two locking devices 45, 46, which are preferably identical in construction and arranged on both sides of the lower dishware receptacle 12. Only one locking device 45, 46 may also be provided. With the aid of the locking devices 45, 46, the lifting device 15 can be locked in a plurality of intermediate positions between the starting position AP and the end position EP, and vice versa. The locking devices 45, 46 are provided at the pivot point 39 of the actuating lever 34 provided on the lower dishware receptacle 12. The locking devices 45, 46 may be firmly connected to the lower dishware receptacle 12. Alternatively, the locking devices 45, 46 can be arranged on the receiving device provided for the lower dishware holder 12, so that the lower dishware holder 12 can be separated from the locking devices 45, 46.

[0064] The Fig. 6 shows a schematic partial side view of the lifting device 15 of the lifting system 200 without the lower dishware holder 12 ( Fig. 4 and Fig. 5), the Fig. 7 shows the detailed view VII according to the Fig. 6, the Fig. Fig. 8 shows a further schematic partial side view of the lifting device 15 of the lifting system 200 without the lower dishware holder 12 and the Fig. 9 shows the detailed view IX according to the Fig. 8. In the following, reference is made to the Fig. 6 to 9 are referred to simultaneously.

[0065] The following refers only to the locking device 45. However, the locking device 46 is structurally identical to the locking device 45. The locking device 45 comprises a base plate 47, which is immovable relative to the lower dishware holder 12. For example, the base plate 47 is firmly connected to the lower dishware holder 12. Alternatively, the base plate 47 can be firmly connected to the receiving device provided for the lower dishware holder 12, so that the lower dishware holder 12 can be separated from the locking device 45. The base plate 47 is partially circular. The base plate 47 can be made, for example, from a steel material.

[0066] Connected to the base plate 47 is a toothed segment 48 which is immovable relative to the lower dishware holder 12. The toothed segment 48 is, for example, screwed, riveted or welded to the base plate 47. The toothed segment 48 comprises a toothing 49 with a plurality of teeth 50, of which Fig. 7 and Fig. 9 only one is provided with a reference symbol. The teeth 50 of the toothing 49 are, as shown in the Fig. 7 and Fig. 9, arranged in a circular arc. This means that the teeth 50 are arranged on a circular path. For example, the toothing 49 can form a quarter circle. The toothing 49 is preferably not a straight toothing, so the teeth 50 are formed asymmetrically. In particular, the teeth 50 are inclined.

[0067] The locking device 45 further comprises a toothed element 51 coupled to the operating element 36 of the actuating lever 34. The toothed element 51 is coupled to the operating element 36, for example, by means of the lever arm 42. For example, an elongated hole 52 is provided in the toothed element 51, in which a bolt 53 is received, on which the lever arm 42 is rotatably mounted. The toothed element 51 is mounted on the base plate 47 such that it rotates with the lever arm 42 when it moves. The toothed element 51 has a counter-toothing 54 corresponding to the toothing 49 with teeth 55, of which Fig. 9, only one is provided with a reference numeral. For example, four such teeth 55 are provided. The teeth 55 are designed to positively engage the teeth 50 of the toothing 49. The tooth element 51 comprises an elongated hole 56 in which the pivot point 39 is mounted. For this purpose, the pivot point 39 can comprise a bolt or be designed as a bolt.

[0068] The locking device 45 further comprises a guide element 57. The toothed element 51 is linearly guided in or on the guide element 57. The linear mobility of the toothed element 51 relative to the guide element 57 is Fig. 7 and Fig. 9 with an arrow 58. When the lever arm 42 moves, the guide element 57 rotates with it. For this purpose, the guide element 57 is rotatably mounted at the pivot point 39. The toothed element 51 is spring-loaded in the direction of the toothed segment 48. A spring device, such as a cylindrical spring or a leaf spring, can be provided for this purpose. In particular, a preload force FV oriented in the direction of the toothed segment 48 acts on the toothed element 51.

[0069] The functionality of the household dishwasher 1 is explained below. Initially, the lower dishware holder 12 is in the starting position AP and, with the door 3 open, is moved completely out of the washing tub 2 with the aid of the guide devices 20. As soon as the lower dishware holder 12 is completely out of the washing tub 2, the actuating lever 34 is actuated to move the lower dishware holder 12 from the starting position AP ( Fig. 2A and Fig. 3A) to the final position EP ( Fig. 4 and Fig. 5). To do this, the operating lever 34 is pulled upward. This lifting process can be assisted by the drive element 33.

[0070] When the lower dishware holder 12 is lifted from the starting position AP to the end position EP, the teeth 55 of the counter-toothing 54 of the toothed element 51, due to their oblique geometry, jump over the teeth 50 of the toothing 49 of the toothed segment 48 without the operating element 36 being actuated. This means that when the lower dishware holder 12 is lifted from the starting position AP to the end position EP, actuation of the locking devices 45, 46 is not necessary. Due to the spring preload of the toothed element 51, its teeth 55 are pressed into the toothing 49 of the toothed segment 48. The lower dishware holder 12 can thus be lifted to the end position EP. Because the counter-toothing 54 engages with the toothing 49, the lower dishware holder 12 can be automatically locked in a variety of intermediate positions between the starting position AP and the end position EP.The number of intermediate positions depends on the pitch and the number of teeth 50, 55.

[0071] To move the lower dishware holder 12 from the end position EP to the starting position AP, due to the geometry of the toothing 49 and the counter-toothing 54, it is necessary to actuate the operating element 36, whereby the lever arms 42, 43 pivot about the pivot points 44. As a result, the toothed element 51 is moved away from the toothing 49 of the toothed segment 48 against the spring preload VF with the aid of the guide element 57. As a result, the teeth 55 disengage from the teeth 50 and the lower dishware holder 12 can be moved downwards towards the starting position AP.

[0072] The lower dishware holder 12 can thus be moved from the end position EP back to the starting position AP. Due to the loading of the lower dishware holder 12 with dishes, it can move automatically from the end position EP to the starting position AP. As soon as the operating lever 34 is released, the operating element 36 is no longer actuated, whereby the counter-toothing 54 re-engages with the toothing 49 due to the spring preload of the toothed element 51 in the direction of the toothed segment 48. The lower dishware holder 12 is then locked again. Further downward movement of the lower dishware holder 12 towards the starting position AP is then not possible without actuating the operating element 36 again.

[0073] With the help of the locking devices 45, 46, an automatic and uncontrolled movement of the lower dishware holder 12 from the end position EP to the starting position AP can be prevented. This greatly reduces the risk of injury. The lower dishware holder 12 can thus be locked in any number of intermediate positions between the starting position AP and the end position EP. Because the lower dishware holder 12 cannot descend uncontrollably from the end position EP to the starting position AP, defects in the lifting device 15 of the lifting system 200 and in the household dishwasher 1 can be prevented. The risk of damage to the dishes is also minimized.

[0074] The Fig. 10 shows a schematic side view of an embodiment of an actuated lifting device 15 of the lifting system 200 and guide devices 20 for a piece of furniture 100 (not shown in detail) in an end position EP. The actuated lifting device 15 of the lifting system 200 and the guide devices 20 of an end position EP can of course also be used for a household dishwasher 1 ( Fig. 2A and Fig. 2B) may be provided.

[0075] The Fig. 11 shows a schematic side view of the unactuated lifting device 15 of the lifting system 200 and guide devices 20 for a piece of furniture according to Fig. 10 in a final position EP.

[0076] The lifting system 200, the lifting device 15 and the guide devices 20 correspond both in their construction and in their functioning to the Fig. 4 to 9, so that with regard to their description, reference is made to the description of the Fig. 4 to 9. The respective guide device 20 comprises, as previously mentioned, a first guide rail 21, which is fixedly connected to the merely indicated side wall 102 of the body 101 of the furniture 100, a second guide rail 22, on which the lifting device 15 of the lifting system 200 is movably displaceable, and a third guide rail 23, which is arranged between the first guide rail 21 and the second guide rail 22.

[0077] The respective end section 24 of the lever arms 17 is preferably displaceable relative to the second guide rail 22. An end section 27 of the lever arm 18 is preferably also displaceable relative to the second guide rail 22. The end section 27 can also be immovable on the second guide rail 22. The lever arm 17 is rotatably connected to the lower storage element 104 ( Fig. 3B) or on the receiving device provided for the lower storage element 104, as in the embodiment according to Fig. 3. An end section 30 of the lever arm 18 is rotatably attached to the lower storage element 104 or to the receiving device for the lower storage element 104 on a rotation axis 31. Furthermore, the end section 30 is linearly displaceable relative to the lower storage element 104 or the receiving device for the lower storage element 104. For this purpose, a guide rail 32 can be provided on the lower storage element 104 or on the receiving device for the lower storage element 104. The scissor lifting system 16 can further comprise a drive element 33, for example a spring.

[0078] The lifting device 15 of the lifting system 200 comprises an actuating lever 34 for actuating the lifting device 15. The actuating lever 34 comprises a handle 35 and an operating element 36, which is displaceable relative to the handle 35. The operating element 36 can be a so-called impact bar. The handle 35 is provided with lever arms 37, 38 ( Fig. 4 and Fig. 5) is coupled to the scissor lifting system 16. The actuating lever 34 is rotatably mounted on the lower storage element 104 or on the receiving device for the lower storage element 104 by means of a pivot point 39. In particular, the lever arms 37, 38 are rotatably mounted on the lower storage element 104 or on the receiving device for the lower storage element 104 by means of the pivot point 39. For this purpose, a bolt and a corresponding bearing can be provided at the pivot point 39. By means of a further pivot point 40, the lever arms 37, 38 are each connected to a lever arm 41 of the scissor lifting system 16. The lever arm 41 is, for example, firmly connected to the respective lever arm 17 of the scissor lifting system 16. The operating element 36 comprises lever arms 42, 43 provided on both sides of the lower storage element 104 ( Fig. 4 and Fig. 5), which are rotatably mounted on the lever arms 37, 38 at a respective pivot point 44.

[0079] The lifting device 15 of the lifting system 200 is preferably assigned two locking devices 45, 46, which are preferably identical in construction and arranged on both sides of the lower storage element 104. Only one locking device 45, 46 may also be provided.

[0080] With the aid of the locking devices 45, 46, the lifting device 15 can be locked in a variety of intermediate positions between the starting position AP and the end position EP, and vice versa. The locking devices 45, 46 are provided at the pivot point 39 of the actuating lever 34 provided on the lower storage element 104. The locking devices 45, 46 can be fixedly connected to the lower storage element 104. Alternatively, the locking devices 45, 46 can be arranged on the receiving device provided for the lower storage element 104, so that the lower storage element 104 can be separated from the locking devices 45, 46.

[0081] The locking device 45 of the lifting device 15 of the lifting system 200 corresponds both in its construction and in its functioning to the Fig. 6 to Fig. 9 shown assemblies and components, so that with regard to its description, reference is made to the description of the Fig. 6 to Fig. 9 is referred to.

[0082] In Fig. 10, the operating element 36 is displaced relative to the handle 35, i.e. actuated. In Fig. 11, the operating element 36 is displaceable relative to the handle 35, i.e., unactuated.

[0083] Although the present invention has been described using exemplary embodiments, it can be modified in many ways. Reference symbols used 1 household dishwasher 2 rinsing containers 3 Door 4 rinsing chamber 5 swivel axis 6 Loading opening 7 Floor 8 Ceiling 9 Rear wall 10 Side wall 11 Side wall 12 Dishwasher basket 13 Dishwasher holder 14 Dishwasher holder 15 Lifting device 16 Scissor lifting system 17 Lever arm 18 lever arm 19 Pivot point 20 guidance device 21 Guide rail 22 Guide rail 23 Guide rail 24 final section 25 roller 26 Cross brace 27 final section 28 final section 29 Pivot point 30 final section 31 axis of rotation 32 guide rail 33 Drive element 34 operating lever 35 Handle 36 Control element 37 lever arm 38 lever arm 39 Pivot point 40 pivot point 41 lever arm 42 lever arm 43 lever arm 44 Pivot point 45 locking device 46 Locking device 47 Base plate 48 tooth segment 49 Gearing 50 teeth 51 tooth element 52 slot 53 bolts 54 Counter-toothing 55 tooth 56 slot 57 Guide element 58 Arrow 100 pieces of furniture 101 Corpus 102 side wall 103 storage element 104 storage element 105 Guide device 106 Shear element 200 lifting system A Extension direction (arrow) AP starting position E Insertion direction (arrow) EP final position FV preload force

Claims

[1] Lifting system (200) comprising a lifting device (15) and a lower dishware holder (12) which can be acted upon by the lifting device (15) for a household dishwasher (1) comprising a washing container (2) or a lower storage element (104) which can be acted upon by the lifting device (15) for a piece of furniture (100) comprising a carcass (101), - wherein the lifting device (15) is designed to lift the lower dishware holder (12) or the lower storage element (104) from a starting position (AP) to an end position (EP) or to lower it from the end position (EP) to the starting position (AP), - wherein the lifting device (15) has an actuating lever (34) for actuating the same, - wherein a locking device (45, 46) is provided which is designed to lock the lifting device (15) in a plurality of intermediate positions between the end position (EP) and the starting position (AP), and - wherein the locking device (45, 46) is arranged at a pivot point (39) of the actuating lever (34) provided on the lower dishware holder (12) or on the lower storage element (104). [2] Lifting system (200) according to claim 1, characterized by in that the locking device (45, 46) comprises a toothed segment (48) which is immovable relative to the lower dishware holder (12) or the lower storage element (104) and a toothed element (51) which is coupled to an operating element (36) of the actuating lever (34) and which engages positively in the toothed segment (48) in order to lock the lifting device (15), wherein the operating element (36) is preferably rotatably mounted on the actuating lever (34). [3] Lifting system (200) according to claim 2, characterized by that the tooth element (51) is spring-loaded in the direction of the tooth segment (48). [4] Lifting system (200) according to claim 3, characterized bythat by actuating the operating element (36) the toothed element (51) can be brought out of positive engagement with the toothed segment (48) against the spring preload. [5] Lifting system (200) according to one of claims 2 to 4, characterized by that the locking device (45, 46) comprises a guide element (57) on or in which the toothed element (51) is guided linearly. [6] Lifting system (200) according to one of claims 2 to 5, characterized by that the toothed element (51) is rotatably movable relative to the toothed segment (48) when the lower dishware holder (12) or the lower storage element (104) is raised from the starting position (AP) into the end position (EP) or when the lower dishware holder (12) or the lower storage element (104) is lowered from the end position (EP) into the starting position (AP). [7] Lifting system (200) according to one of claims 2 to 6, characterized bythat the toothed segment (48) has a toothing (49) and the toothed element (51) has a counter-toothing (54) corresponding to the toothing (49). [8] Lifting system (200) according to claim 7, characterized by that teeth (50) of the toothing (49) are arranged in a circular arc. [9] Lifting system (200) according to claim 7 or 8, characterized by that the toothing (49) and the counter-toothing (54) are designed such that when the lower dishware holder (12) or the lower storage element (104) is lifted from the starting position (AP) to the end position (EP), teeth (55) of the counter-toothing (54) automatically jump over teeth (50) of the toothing (49) without actuation of the operating element (36). [10] Lifting system (200) according to claim 9, characterized by that the teeth (55) of the counter-toothing (54) and / or the teeth (50) of the toothing (49) are asymmetrical. [11] Lifting system (200) according to one of claims 7 to 10, characterized bythat the toothing (49) and the counter-toothing (54) are designed such that when the lower dishware holder (12) or the lower storage element (104) is lowered from the end position (EP) into the starting position (AP), teeth (55) of the counter-toothing (54) can only be brought out of positive engagement with teeth (50) of the toothing (49) by means of an actuation of the operating element (36). [12] Lifting system (200) according to one of the preceding claims, characterized by a guide device (20) with the aid of which the lifting device (15) together with the lower dishware holder (12) can be moved out of the washing container (2) or together with the lower storage element (104) out of the body (101) or into it. [13] Lifting system (200) according to one of the preceding claims, characterized byin that the lifting device (15) for lifting the lower dishware holder (12) or the lower storage element (104) from the starting position (AP) to the end position (EP) and for lowering the lower dishware holder (12) or the lower storage element (104) from the end position (EP) to the starting position (AP) comprises a scissor lifting system (16), wherein the scissor lifting system (16) preferably has a drive element (33), in particular a spring. [14] Household dishwasher (1) with a lifting system (200) comprising a lifting device (15) and a lower dishware holder (12) which can be acted upon by the lifting device (15), according to one of the preceding claims. [15] Furniture (100) with a lifting system (200), comprising a lifting device (15) and a lower storage element (104) which can be acted upon by the lifting device (15), which is preferably designed as a container, wire basket, shelf or drawer, according to one of claims 1 to 13.

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