Lifting mechanism and household appliance

Abstract

The lifting mechanism comprises a fixed arm and two swing arms, at least parts of the two swing arms are oppositely arranged in the front-back direction, the two ends of each swing arm are correspondingly provided with a first hinge installation part and a second hinge installation part, the first hinge installation parts are installed on the fixed arm, and the second hinge installation parts are installed on the fixed arm. Each second hinge mounting portion is used for being directly or indirectly mounted on a first storage rack, each swing arm is provided with an upper swing limit position and a lower swing limit position, and the opposite side surfaces of the two swing arms abut against each other at the upper swing limit positions and / or the lower swing limit positions so as to limit the two swing arms to stop swinging backwards or upwards. Swing stopping can be achieved without additionally arranging other limiting structures, and the structural arrangement is simplified.

Description

[0001] This application claims the priority of Chinese Patent Applications filed with the China National Intellectual Property Administration on April 30, 2024, with application numbers 202420944026.0 and 202420943980.8, both with the title "Lifting Mechanism and Dishwasher", the entire contents of which are incorporated herein by reference. Technical Field

[0002] The utility model relates to the technical field of household appliances, and particularly to a lifting mechanism and a household appliance. Background Art

[0003] In household appliances having an internal space, movable storage structures such as a storage rack that can extend from the interior of the household appliance are usually configured. In the prior art, there are some movable storage structures that have a pulling-out function and also a lifting function.

[0004] In some household appliances, the storage rack is usually placed at the bottom of the household appliance. During use, operations such as taking and placing tableware require frequent bending over. In order to reduce the frequency of bending over during the use of the storage rack, in the prior art, a lifting mechanism is used to lift the storage rack before use, which can reduce the frequency of bending over. However, currently, the existing lifting mechanism can only lift the storage rack to a relatively low height, and users still need to bend over frequently during use, resulting in a poor user experience. Summary of the Utility Model

[0005] The main object of the present utility model is to provide a lifting mechanism and a household appliance, aiming to optimize the existing lifting mechanism to reduce the frequency of bending over of users during operation and improve the user experience. However, how to limit the movement of the lifting mechanism at the extreme positions still requires optimization of the existing lifting mechanism.

[0006] To achieve the above object, the present utility model provides a lifting mechanism, which includes:

[0007] A fixed arm; and

[0008] Two swing arms, at least partially opposite to each other in the front-rear direction. At both ends of each swing arm, a first hinge mounting portion and a second hinge mounting portion are correspondingly provided. Each first hinge mounting portion is mounted on the fixed arm, and each second hinge portion is used to directly or indirectly mount on the first storage rack. Each swing arm has an upper swing limit position and a lower swing limit position. The lower swing limit position is used to enable the first storage rack to be in the bottom position to be lifted, and the upper swing limit position is used to enable the first storage rack to be in the top lifting limit position;

[0009] At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in contact.

[0010] In an embodiment, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in close contact with each other.

[0011] In an embodiment, a first connection line is formed at the rotation centers of the first hinge mounting portion and the second hinge mounting portion of the same swing arm;

[0012] The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, and the first side edge is arranged parallel to the first connection line.

[0013] In an embodiment, a first connection line is formed at the rotation centers of the first hinge mounting portion and the second hinge mounting portion of the same swing arm, and at the lower swing limit position, the first connection line extends in the up-down direction.

[0014] In an embodiment, the opposite side surfaces of the two swing arms include a first side surface and a second side surface, and the first side surface is convexly provided with an abutting convex portion facing the second side surface, wherein:

[0015] At the lower swing limit position, the abutting convex portion avoids the second side surface; at the upper swing limit position, the abutting convex portion abuts against the second side surface; or,

[0016] At the lower swing limit position, the abutting convex portion abuts against the second side surface, and at the upper swing limit position, the abutting convex portion avoids the second side surface.

[0017] In an embodiment, the two swing arms include a first swing arm at the rear side and a second swing arm at the front side at the lower swing limit position;

[0018] The first side surface is located on the second swing arm;

[0019] The abutting convex portion is provided at one end of the second swing arm where the first hinge mounting portion is provided.

[0020] In an embodiment, in the second swing arm, a first connection line is formed at the rotation centers of the first hinge mounting portion and the second hinge mounting portion;

[0021] The side surface of the abutting convex portion has a second side edge in the length direction of the second swing arm, and the second side edge is arranged parallel to the first connection line.

[0022] In an embodiment, in the second swing arm, the distance between the rotation center of the second hinge mounting portion and the second side edge of the abutting convex portion is L7, and 10 mm ≤ L7 ≤ 30 mm.

[0023] In an embodiment, at the upper swing limit position, the two swing arms are used to support the first storage rack upward, and in the direction from the rear to the front, each swing arm is inclined upward.

[0024] In an embodiment, at the upper swing limit position, the included angle between the connection line of the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm and the horizontal direction is α, and 0° < α ≤ 70°; and / or,

[0025] At the upper swing limit position, the vertical drop between the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm is L1, and 0 < L1 ≤ 235 mm.

[0026] In an embodiment, the same swing arm has a swing angle defined between the upper swing limit position and the lower swing limit position, and the swing angle is set as an obtuse angle.

[0027] In an embodiment, the swing angle is β, and 90° < β ≤ 160°.

[0028] The present utility model further provides a household appliance, which includes a housing, a lifting mechanism, and a first storage rack. The housing forms a receiving cavity. The fixed arm of the lifting mechanism is arranged on the side wall of the receiving cavity. The first storage rack is directly or indirectly hinged to the two swing arms of the lifting mechanism;

[0029] The lifting mechanism enables the first storage rack to switch between a bottom waiting-to-be-lifted position and a top lifting limit position;

[0030] Wherein, the lifting mechanism includes:

[0031] A fixed arm; and,

[0032] Two swing arms, the two swing arms are at least partially opposite to each other in the front-rear direction. The two ends of each swing arm are respectively provided with a first hinge mounting portion and a second hinge mounting portion. Each first hinge mounting portion is mounted on the fixed arm. Each second hinge mounting portion is used to directly or indirectly mount the first storage rack. Each swing arm has an upper swing limit position and a lower swing limit position. The lower swing limit position enables the first storage rack to be in the bottom waiting-to-be-lifted position, and the upper swing limit position enables the first storage rack to be in the top lifting limit position;

[0033] At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in abutting contact.

[0034] In an embodiment, a second storage rack is further provided in the accommodation cavity. Corresponding to the top lifting limit position, the lower end of the first storage rack protrudes upward from the lower end of the second storage rack.

[0035] In an embodiment, the household appliance includes a dishwasher, the first storage rack is configured as a lower dish basket; the second storage rack is configured as an upper dish basket.

[0036] In the technical solution of the present utility model, the lifting mechanism includes a fixed arm and two swing arms. The two swing arms are at least partially arranged opposite to each other in the front-rear direction. First hinge mounting parts and second hinge mounting parts are correspondingly arranged at both ends of each swing arm. Each first hinge mounting part is mounted on the fixed arm, and each second hinge mounting part is used to directly or indirectly mount on the first storage rack. Each swing arm has an upper swing limit position and a lower swing limit position. The lower swing limit position is used to enable the first storage rack to be in the bottom position to be lifted, and the upper swing limit position is used to enable the first storage rack to be in the top lifting limit position. At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in close contact to limit the two swing arms from swinging backward or upward. Stopping the swing can be achieved without additionally setting other limiting structures, which simplifies the structural arrangement. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0038] Figure 1 FIG. 15 is a front view structural diagram of an embodiment of the lifting mechanism (the swing arms are in the lower swing limit position) provided by the present utility model;

[0039] Figure 2 For Figure 1 the lifting mechanism in FIG. 21 (the swing arms are in the upper swing limit position);

[0040] Figure 3 For Figure 1 a three-dimensional structural diagram of an embodiment of a household appliance (the first storage rack is in the bottom storage position and the swing arms of the lifting mechanism are in the lower swing limit position) including the lifting mechanism in FIG. 27;

[0041] Figure 4 For Figure 3 the front view structural diagram of the household appliance in FIG. 33;

[0042] Figure 5 is Figure 3 A three-dimensional structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0043] Figure 6 is Figure 3 A front view structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0044] Figure 7 is a household appliance including Figure 1 A three-dimensional structure diagram of a household appliance including a lifting mechanism (the first storage rack is at the bottom waiting to be lifted, and the swing arm of the lifting mechanism is at the lower limit position of the swing);

[0045] Figure 8 is Figure 7 A front view structure diagram of the household appliance;

[0046] Figure 9 is Figure 7 A three-dimensional structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0047] Figure 10 is Figure 7 A front view structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0048] Figure 11 is Figure 7 A partial sectional structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0049] Figure 12 is a household appliance including Figure 1 A three-dimensional structure diagram of a household appliance including a lifting mechanism (the first storage rack is at the top lifting limit position, and the swing arm of the lifting mechanism is at the upper limit position of the swing);

[0050] Figure 13 is Figure 12 A front view structure diagram of the household appliance;

[0051] Figure 14 is Figure 12 A three-dimensional structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0052] Figure 15 is Figure 12 A front view structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0053] Figure 16 is Figure 12 A partial sectional structure diagram of a household appliance including a lifting mechanism and a first storage rack;

[0054] Figure 17is Figure 12 Schematic perspective view of a three - dimensional structure including a lifting mechanism, a first storage rack, and a second storage rack;

[0055] Figure 18 is Figure 10 Schematic front view of a structure including a lifting mechanism, a first storage rack, and a second storage rack;

[0056] Figure 19 is a household appliance including Figure 1 Schematic perspective view of a household appliance (the first storage rack is in the top locking position and the swing arm of the lifting mechanism is in the upper swing limit position) including the lifting mechanism therein;

[0057] Figure 20 is Figure 19 Schematic front view of the household appliance therein;

[0058] Figure 21 is Figure 19 Schematic perspective view of a structure including a lifting mechanism and a first storage rack;

[0059] Figure 22 is Figure 19 Schematic front view of a structure including a lifting mechanism and a first storage rack;

[0060] Figure 23 is Figure 19 Schematic partial cross - sectional view of a structure including a lifting mechanism and a first storage rack.

[0061] Explanation of the reference numerals in the drawings:

[0062] 100, lifting mechanism; 1, fixed arm; 2, swing arm; 2a, first swing arm; 2b, second swing arm; 21, first hinge mounting part; 22, second hinge mounting part; 23, abutting convex part; 24, first connecting line; 25, first side; 26, first side surface; 27, second side surface; 28, second side; 4, first guide rail; 41, first - section slide rail; 42, last - section slide rail; 5, locking structure; 5a, locking part; 511, first mating chute; 5111, horizontal chute section; 5112, arc chute section; 512, second mating chute; 513, first sliding shaft; 514, second sliding shaft;

[0063] 1000, household appliance; 200, housing; 201, accommodating cavity; 300, first storage rack; 400, second storage rack;

[0064] The implementation functions, features, and advantages for achieving the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0065] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0066] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0067] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0068] In a household appliance having an internal space, movable storage structures such as a storage rack that can extend from the interior of the household appliance are usually configured. In the prior art, there are some movable storage structures that have a pulling-out function and also have a lifting function.

[0069] In some household appliances, the storage rack is usually placed at the bottom of the household appliance. During use, operations such as taking and placing tableware require frequent bending over. In order to reduce the frequency of bending over during the use of the storage rack, in the prior art, a lifting mechanism is used to lift the storage rack before use, which can reduce the frequency of bending over. However, currently, the existing lifting mechanism only lifts the storage rack to a relatively low height, and users still need to bend over frequently during use, resulting in a poor user experience.

[0070] In view of this, the present utility model provides a household appliance that can lift the storage rack to a relatively high height, reduce the frequent bending over of users during operation, and improve the user experience. Among them, Figures 1 to 23 is a schematic structural diagram of the household appliance provided by the present utility model.

[0071] Please refer to Figures 3 to 4, the present utility model provides a household appliance 1000, which can be a dishwasher, an oven, a baking oven, a refrigerator, etc. The household appliance 1000 includes a housing 200, and an accommodation cavity 201 is formed in the housing 200. A first storage rack 300 is connected in the accommodation cavity 201 through a lifting mechanism 100. Utensils to be placed are arranged on the first storage rack 300, such as tableware like bowls, plates, dishes, chopsticks, knives and forks, or baked food ingredients or items to be refrigerated, etc.

[0072] In the present utility model, with the user as the reference direction, forward is the direction towards the user, or the side of the household appliance 1000 where the door is provided; backward is the direction opposite to the forward direction, specifically the direction away from the user, and the up and down directions are the directions with gravity as the reference.

[0073] It should be noted that in some household appliances 1000, there is only one storage rack, such as the first storage rack 300. There are also those with multiple storage racks. In the embodiments of the household appliance 1000 with multiple storage racks, there can be two, such as the first storage rack 300 and the second storage rack 400. When the two storage racks have a vertical positional relationship, they can be referred to as the upper storage rack and the lower storage rack. In the description of the embodiments of the present utility model, the first storage rack 300 corresponds to the lower storage rack, and the second storage rack 400 corresponds to the upper storage rack.

[0074] For the first storage rack 300, it is necessary to move the first storage rack 300 out of the accommodation cavity 201 of the household appliance 1000, then lift it to a suitable position, and finally lock it in place. Specifically, after the door of the household appliance 1000 is opened, the user needs to put in or take out the items to be placed from the first storage rack 300. The user usually pulls the first storage rack 300 forward. During the movement of the first storage rack 300, there will be a combined movement process, that is, moving forward and upward simultaneously. At this time, the lifting mechanism 100 will move accordingly and support the first storage rack 300.

[0075] The first storage rack 300 has several important positions during its movement. Commonly, there are the bottom storage position (as shown in Figure 3 and Figure 4 ), the bottom position to be lifted (as shown in Figure 7 and Figure 8 ), the top lifting limit position (as shown in Figure 12 and Figure 13 ), and the top locking position (as shown in Figure 19 and Figure 20 ).

[0076] In some embodiments, the first storage rack 300 may have only two positions, namely, the bottom position to be lifted and the top lifting limit position; the first storage rack 300 may also have three positions, namely, the bottom storage position, the bottom position to be lifted, and the top lifting limit position. At this time, the top lifting limit position and the top locking position of the first storage rack 300 may be the same position; the first storage rack 300 may also have four positions, namely, the bottom storage position, the bottom position to be lifted, the top lifting limit position, and the top locking position. At this time, the top lifting limit position and the top locking position of the first storage rack 300 are different positions.

[0077] For the lifting mechanism 100, the main function of the lifting mechanism 100 is to lift the first storage rack 300, and the movement of the lifting mechanism 100 may only correspond to the bottom position to be lifted and the top lifting limit position of the first storage rack 300.

[0078] The lifting mechanism 100 in the household appliance 1000 often adopts a link mechanism, that is, the first storage rack 300 is lifted by a single link or a combination of several links. In an embodiment with only one link, the link may be set as the swing arm 2. The two ends of the swing arm 2 are respectively formed with a first hinge mounting portion 21 and a second hinge mounting portion 22. The first hinge mounting portion 21 is hinged in the accommodation cavity 201 of the housing 200 of the household appliance 1000, and the second hinge mounting portion 22 is connected to the first storage rack 300. In addition, other supporting structures may be used to support the swing of the swing arm 2. Of course, a plurality of link mechanisms may also be adopted and arranged on both sides of the first storage rack 300, that is, two swing arms 2 are arranged on both sides of the first storage rack 300 to realize the follow-up swing. Therefore, a single swing arm 2 can lift the first storage rack 300 within its swing stroke.

[0079] In the combination of multiple links, a four-link mechanism is often adopted. Two of the links in the four-link mechanism can be set as swing arms 2, that is, the first storage rack 300 is lifted in the form of double swing arms 2. In this way, during the lifting process of the first storage rack 300, the stability will be better, which will be described in detail in subsequent embodiments.

[0080] Therefore, for the swing arm 2, the swing arm 2 has a lower swing limit position and an upper swing limit position. When the first storage rack 300 has only two positions, namely, the bottom position to be lifted and the top lifting limit position, when the swing arm 2 is in the lower swing limit position, the corresponding first storage rack 300 is in the bottom position to be lifted; when the swing arm 2 is in the upper swing limit position, the corresponding first storage rack 300 is in the top lifting limit position.

[0081] When the first storage rack 300 has three positions, namely a bottom storage position, a bottom position to be lifted, and a top lifting limit position, when the swing arm 2 is at the lower swing limit position, the corresponding first storage rack 300 is at the bottom storage position and the bottom position to be lifted; when the swing arm 2 is at the upper swing limit position, the corresponding first storage rack 300 is at the top lifting limit position.

[0082] When the first storage rack 300 has four positions, namely a bottom storage position, a bottom position to be lifted, a top lifting limit position, and a top locking position, when the swing arm 2 is at the lower swing limit position, the corresponding first storage rack 300 is at the bottom storage position and the bottom position to be lifted; when the swing arm 2 is at the upper swing limit position, the corresponding first storage rack 300 is at the top lifting limit position and the top locking position.

[0083] It should be noted that the first hinge mounting portion 21 of the swing arm 2 is a fixed hinge point, and its position does not change. The swinging movement of the swing arm 2 only indicates the movement of the movable hinge point of the swing arm 2, that is, the movement of the end of the swing arm 2 where the second hinge mounting portion 22 is provided. The upper swing limit position and the lower swing limit position of the swing arm 2 are both referenced by the movable end of the swing arm 2. That is, when the swing arm 2 is at the lower swing limit position, the end of the swing arm 2 where the second hinge mounting portion 22 is provided is at the bottom limit position; when the swing arm 2 is at the upper swing limit position, the end of the swing arm 2 where the second hinge mounting portion 22 is provided is at the top limit position.

[0084] In the solution for realizing the large-height lifting of the storage rack of the household appliance 1000, it is also necessary to optimize the lifting mechanism 100 in the prior art to reduce the setting of the limiting structure to realize the stop of the swing arm 2 in the lifting mechanism 100.

[0085] In some embodiments, please refer to Figure 1, the lifting mechanism 100 includes a fixed arm 1 and two swing arms 2. The two swing arms 2 are at least partially arranged opposite to each other in the front-rear direction. At both ends of each swing arm 2, a first hinge mounting portion 21 and a second hinge mounting portion 22 are correspondingly arranged. Each first hinge mounting portion 21 is mounted on the fixed arm 1, and each second hinge mounting portion 22 is used to directly or indirectly mount on the first storage rack 300. Each swing arm 2 has an upper swing limit position and a lower swing limit position. The lower swing limit position is used to enable the first storage rack 300 to be in the bottom position to be lifted, and the upper swing limit position is used to enable the first storage rack 300 to be in the top lifting limit position. At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 are in close contact and abutment.

[0086] In the technical solution of the present utility model, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 are in abutment to limit the two swing arms 2 from swinging backward or upward. Without the need to additionally provide other limiting structures, the swing can be stopped, which simplifies the structural arrangement.

[0087] In some embodiments, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 are in close contact and abutment. By means of the close contact and abutment of the two side surfaces, the two swing arms 2 have a large abutment area, and the swing stopping effect achieved by abutment is good.

[0088] It should be noted that the two swing arms 2 are at least partially arranged opposite to each other in the front-rear direction, that is, the two swing arms 2 are parallel in the front-rear direction, or only partially staggered, so that they can abut against each other during movement. The above two swing arms 2 can be defined in a planar four-bar mechanism; in some embodiments, the two swing arms 2 are arranged in a staggered manner in the front-rear direction, that is, the two swing arms 2 are not in the same plane and are in different planes. The above two swing arms 2 can be defined in a spatial four-bar structure.

[0089] At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 are in close contact and abutment. It can be understood that at the upper swing limit position, the opposite side surfaces of the two swing arms 2 can be in close contact and abutment, and at the lower swing limit position, the opposite side surfaces of the two swing arms 2 can be in close contact and abutment. Either one can exist, or both can exist at the same time. The above are all within the protection scope of the present utility model.

[0090] In some embodiments, a first connection line 24 is formed at the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 of the same swing arm 2.

[0091] The opposite side surfaces of the two swing arms 2 have a first side edge 25 along the length direction of the swing arm 2, and the first side edge 25 is arranged parallel to the first connection line 24. With this arrangement, when the swing arm 2 swings with the first hinge mounting portion 21 and the second hinge mounting portion 22 as the rotation centers, the opposite side surfaces of the two swing arms 2 can always remain parallel, reducing the situation of jamming in local scenarios, and facilitating the abutting contact of the opposite side surfaces of the two swing arms 2 at the lower limit position, improving the stability of the entire lifting mechanism 100 during the movement process.

[0092] For the lower swing limit position, the two swing arms 2 can be in a vertical state or in an inclined state. In some embodiments, at the lower swing limit position, the first connection line 24 extends in the up-down direction, that is, the swing arm 2 stops swinging in a vertical state. During the process of pulling the first storage rack 300 horizontally out of the household appliance 1000, the impact on the swing arm 2 can be reduced.

[0093] In some embodiments where one of the upper swing limit position or the lower swing limit position is set such that the opposite side surfaces of the two swing arms 2 are in abutting contact, the abutting at the other position can adopt convex portion abutting to reduce the abutting area.

[0094] Specifically, please refer to Figure 1 and Figure 2 , the opposite side surfaces of the two swing arms 2 include a first side surface 26 and a second side surface 27, and the first side surface 26 protrudes towards the second side surface 27 with an abutting convex portion 23. Wherein, at the lower swing limit position, the abutting convex portion 23 avoids the second side surface 27; at the upper swing limit position, the abutting convex portion 23 abuts against the second side surface 27.

[0095] In some other embodiments, at the lower swing limit position, the abutting convex portion 23 abuts against the second side surface 27, and at the upper swing limit position, the abutting convex portion 23 avoids the second side surface 27.

[0096] In the technical solution of the present utility model, by means of the abutting of the abutting convex portion 23 with the opposite side surface, only the abutting convex portion 23 needs to be designed, and the setting method is simple; in addition, in the embodiments where the abutting of the abutting convex portion 23 and the abutting of the side surface in contact are combined, during the switching process between the upper swing limit position and the lower swing limit position, the abutting convex portion 23 can be well designed for avoidance.

[0097] In an embodiment where the side surface is brought into abutting contact at one extreme position and the abutting projection 23 is brought into abutting contact at the other extreme position, the setting position of the abutting projection 23 on the swing arm 2 is not limited. For example, it can be set at a position on the swing arm 2 adjacent to the first hinge mounting portion 21; it can also be a position adjacent to the second hinge mounting portion 22.

[0098] In some embodiments, the two swing arms 2 include a first swing arm 2a at the rear side and a second swing arm 2b at the front side in the lower swing extreme position. The first side surface 26 is located on the second swing arm 2b. The abutting projection 23 is provided at one end of the second swing arm 2b where the first hinge mounting portion 21 is provided. By setting the abutting projection 23 adjacent to the first hinge mounting portion 21 of the second swing arm 2b, when the abutting projection 23 abuts against the side surface of the first swing arm 2a, the user can only pull up the first storage rack 300 in a way that damages the structure to make the two swing arms 2 swing upward further. Therefore, the anti-swing effect between the two swing arms 2 is better.

[0099] In some embodiments, the side surface of the abutting projection 23 has a second side edge 28 along the length direction of the second swing arm 2b. The second side edge 28 is arranged parallel to the first connection line 24. In this way, the side edge of the abutting projection 23 can entirely abut against the opposite side surface of the first swing arm 2a, having an ideal abutting area, and the anti-swing effect between the first swing arm 2a and the second swing arm 2b is also better.

[0100] The height setting of the abutting projection 23 also determines the angle at which the second swing arm 2b can swing upward. In some embodiments, please refer to Figure 2 In the second swing arm 2b, the distance between the rotation center of the second hinge mounting portion 22 and the second side edge 28 of the abutting projection 23 is L7, and 10 mm ≤ L7 ≤ 30 mm. With such a setting, on the one hand, the two swing arms 2 can be stopped from swinging upward to the upper swing limit by abutting, and on the other hand, the second swing arm 2b can swing upward to a larger angle, realizing a large-height lift of the first storage rack 300.

[0101] When the distance between the rotation center of the second hinge mounting portion 22 and the second side edge 28 of the abutting projection 23 is 10 mm, the widths of the first swing arm 2a and the second swing arm 2b are smaller, the structural strength is weaker, and the upward swing angle of the two swing arms 2 is also smaller. The structure is light, and it is more labor-saving for the user to use.

[0102] When the distance between the rotation center of the second hinge mounting portion 22 and the second side 28 of the abutting convex portion 23 is 30 mm, the widths of the first swing arm 2a and the second swing arm 2b are relatively large, the structural strength is relatively large, and the upward swing angles of the two swing arms 2 are also relatively large. As a result, the structure appears bulky and it will be relatively strenuous for users to operate.

[0103] The distance between the rotation center of the second hinge mounting portion 22 and the second side 28 of the abutting convex portion 23 is set between 10 mm and 30 mm. For example, in some embodiments, the value of L7 is 20 mm, taking into account both the good structural strength of the two swing arms 2 and the good convenience of user operation.

[0104] It should be noted that the distance value L7 can be any integer value between 10 mm and 30 mm, such as 10 mm, 20 mm, 30 mm, etc. Of course, it can also be a span value between any two of the above integers. For example, the span value between 10 mm and 20 mm can be 11 mm, 12 m, 13 m, 14 mm, 15 m, 16 m, 17 mm, 18 m, 19 m, etc. Of course, it can also be a span value between 20 mm and 30 mm; of course, it can also be some decimal values. All of the above values are within the protection scope of the present utility model.

[0105] The household appliance 1000 in the present utility model can lift the first storage rack 300 to a relatively high position to reduce the need for users to bend down. For the swing arm 2 in the link mechanism, two aspects of factors can be considered: one is the swing amplitude parameter of the swing arm 2. The larger the swing amplitude, the higher the first storage rack 300 can be lifted. Conversely, the lifted height is relatively small; the other is the installation position parameter of the fixed hinge point of the swing arm 2 in the accommodation cavity 201 of the household appliance 1000. Relative to the accommodation cavity 201 of the household appliance 1000, on the basis of being able to avoid other structures in the accommodation cavity 201, the higher the relative installation position, the higher the first storage rack 300 can be lifted. Conversely, the lifted height is relatively small.

[0106] The swing amplitude parameter of the swing arm 2 and the installation position parameter of the fixed hinge point of the swing arm 2 are two factors that can lift the first storage rack 300 to a relatively high position. The above two factors can consider only one of the parameters, or both parameters can be considered simultaneously.

[0107] The swing amplitude parameter of the swing arm 2 can be characterized by the swing angle of the swing arm 2 and the span in the vertical direction between the first hinge mounting portion 21 and the second hinge mounting portion 22 when the swing arm 2 is at the upper swing limit position. Among them, the larger the swing angle, the greater the height that the first storage rack 300 is lifted. Conversely, the lifted height is relatively small. For the span in the vertical direction between the first hinge mounting portion 21 and the second hinge mounting portion 22 when the swing arm 2 is at the upper swing limit position, the larger the span, the greater the height that the first storage rack 300 is lifted. Conversely, the lifted height is relatively small. For the swing arm 2, a larger span requires a longer length of the swing arm 2 to be set.

[0108] In an embodiment, please refer to Figure 15 , at the upper swing limit position, the swing arm 2 is used to support the first storage rack 300 upward, and in the direction from the rear to the front, the swing arm 2 is inclined upward.

[0109] In the technical solution of the present utility model, the first storage rack 300 is lifted by the swing of the swing arm 2, so that the storage rack can be lifted to the top lift limit position. At the upper swing limit position, the swing arm 2 is used to support the first storage rack 300 upward, and in the direction from the rear to the front, the swing arm 2 is inclined upward. Compared with the swing arm 2 swinging to the horizontal direction, the swing arm 2 can swing a larger angle, so that the first storage rack 300 can be lifted to a greater height, reducing the frequent bending of the user during operation and improving the user experience.

[0110] In the technical solution of the present utility model, the included angle of the swing arm 2 relative to the horizontal direction at the upper swing limit position is not limited. In an embodiment, please refer to Figure 15 , corresponding to the upper swing limit position, the included angle between the connection line of the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 and the horizontal direction is α, and α is greater than 0° and less than or equal to 70°. The larger the included angle, the greater the lift height of the first storage rack 300. Considering that the swing arm 2 needs to cooperate with other structures to achieve lifting, and also considering some interference factors and the structural strength of the swing arm 2, setting the maximum angle of the included angle to 70° is a relatively reasonable value.

[0111] It should be noted that the included angle can be an integer value of 70°, or any integer value between 0° and 70°, such as 10°, 20°, 30°, 40°, 50°, 60°, etc. Of course, it can also be an angular value between any two of the above integers. For example, the degrees between 0° and 10° can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc. It can also be the degrees between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°. Of course, it can also be some decimal degree values. The above values are all within the protection scope of the present utility model.

[0112] It can be understood that when the value of the α angle is larger, the lifting height of the first storage rack 300 is larger, and the first storage rack 300 is closer to the housing 200 of the household appliance 1000 in the front-rear direction. During the process of the lifting mechanism 100 lifting the first storage rack 300, the risk of interference between the first storage rack 300 and other structures provided in the upper space of the housing 200 is larger; when the value of the α angle is smaller, the lifting height of the first storage rack 300 is smaller, and the first storage rack 300 is farther away from the housing 200 of the household appliance 1000 in the front-rear direction. During the process of the lifting mechanism 100 lifting the first storage rack 300, the risk of interference between the first storage rack 300 and other structures provided in the upper space of the housing 200 is smaller.

[0113] When the value of the α angle is 70°, the first storage rack 300 can be lifted to a relatively high position (in the embodiment where the household appliance 1000 has a second storage rack 400, the position of the bottom of the first storage rack 300 is higher than the bottom of the second storage rack 400), which meets the requirement of large-height lifting of the first storage rack 300 and improves the user experience.

[0114] In some embodiments, such as Figure 15 As shown, two swing arms 2 are provided, and the two swing arms 2 are arranged staggeredly, so that when the two swing arms 2 swing to the limit positions, the projections in the vertical plane can at least partially overlap; when the value of the α angle is 70°, the rotation centers of the two first hinge mounting parts 21 of the two swing arms 2 and the second hinge mounting parts 22 of the two swing arms 2 can be collinear, so as to meet the requirement of large-height lifting of the first storage rack 300.

[0115] After the first storage rack 300 is lifted to the top limit position, after the items to be placed are taken and placed in the first storage rack 300, the first storage rack 300 needs to be lowered and placed back. During the process of lowering and placing back the first storage rack 300, the user needs to apply a driving force to the first storage rack 300 so that the swing arm 2 swings downward with the first hinge mounting portion 21 as the rotation center, and the value of the α angle affects the force application situation of the user.

[0116] Specifically, when the value of the α angle is relatively large, the force arm for the user to press down the first storage rack 300 is relatively small, and the applied force required to lower and place back the first storage rack 300 is relatively large; when the value of the α angle is relatively small, the force arm for the user to press down the first storage rack 300 is relatively large, and the applied force required to lower and place back the first storage rack 300 is relatively small.

[0117] For the value of the α angle, multiple factors need to be considered, such as the lifting height of the first storage rack 300, the risk of interference between the first storage rack 300 and other structures in the upper space of the housing 200, and the magnitude of the force required to lower and place back the first storage rack 300. When the value of the α angle is below 70°, the risk of interference between the first storage rack 300 and other structures in the upper space of the housing 200 is relatively small. ， No further detailed description will be made for this factor hereafter.

[0118] In some embodiments, the value of the α angle can be between 15° and 50°. The first storage rack 300 can be lifted to a relatively high and appropriate position, and the force required to lower and place back the first storage rack 300 is moderate.

[0119] The following will be described in terms of the value of the α angle, the lifting height of the first storage rack 300, and the force required to lower and place back the first storage rack 300, and a reference example with the value of the α angle being 70° will be used for illustration.

[0120] When the value of the α angle is 15°, compared with the reference example, the angle is reduced by 55°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.7 times, and the force arm for the user to press down the first storage rack 300 increasing by approximately 1.8 times. The increase in the force arm is obvious, and the user operation is more labor-saving. When the value of the α angle is 15°, more consideration is given to the force required to lower and place back the first storage rack 300. In this embodiment, the first storage rack 300 can be lifted to a suitable height position, the force required for the user to lower and place back the first storage rack 300 is relatively small, operating the household appliance 1000 is easier and more convenient, and the user experience is improved.

[0121] When the value of the α angle is 50°, compared with the reference example, the angle is reduced by 20°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.2 times, and the force arm of the force applied by the user to press down the first storage rack 300 increasing by approximately 1.2 times. The decrease in height is obvious, enabling the first storage rack 300 to be at a relatively large height. When the value of the α angle is 50°, the lifting height of the first storage rack 300 is given relatively more consideration. In this embodiment, it can ensure that the force required to drop and then place the first storage rack 300 back is moderate, and the first storage rack 300 can be lifted as high as possible to a suitable position, meeting the requirement for the first storage rack 300 to be lifted to a large height.

[0122] In some preferred embodiments, when the value of the α angle is around 25°, compared with the reference example, the angle is reduced by 45°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.6 times, and the decrease in height is moderate; the force arm of the force applied by the user to press down the first storage rack 300 increases by approximately 1.6 times, and the increase in the force arm of the force applied is moderate, taking into account both the lifting height of the first storage rack 300 and the force required to drop and then place the first storage rack 300 back.

[0123] Regarding the span in the vertical direction between the first hinge mounting portion 21 and the second hinge mounting portion 22 when the swing arm 2 is at the upper swing limit position, in one embodiment, please continue to refer to Figure 15 , the span in the vertical direction between the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 is L1, and L1 is greater than 0 mm and less than or equal to 235 mm. The larger the span, the greater the height that the first storage rack 300 can be lifted. Considering that the swing arm 2 needs to cooperate with other structures to achieve lifting, as well as some interference factors and the structural strength of the swing arm 2, setting the maximum span to 235 mm is a relatively reasonable value.

[0124] It should be noted that the span can be any integer value between 0 and 235, such as 50mm, 100mm, 150mm, 200mm, 235mm, etc. Of course, it can also be a span value between any two of the above integers. For example, the span value between 0 and 50mm can be 10mm, 20m, 30m, 40mm, etc. Of course, it can also be the span value between 150mm and 200mm, which can be 160mm, 170m, 180m, 190mm, etc.; it can also be the span value between 50mm and 100mm, the span value between 100mm and 150mm, the span value between 200mm and 235mm. Of course, it can also be some decimal values. The above values are all within the protection scope of the present utility model.

[0125] It can be understood that the larger the value of the span L1, the greater the lifting height of the first storage rack 300. On the premise that the limit angle α of the swing of the swing arm 2 remains unchanged, when the first storage rack 300 is lifted to a relatively high position, the arm length of the swing arm 2 needs to be set longer. When the first storage rack 300 is lifted to the top lifting limit position, the first storage rack 300 occupies a relatively large external space of the housing 200 of the household appliance 1000.

[0126] When the span L1 is 235mm, as Figure 15 shown, the first storage rack 300 can be lifted to a relatively high position (in the embodiment where the household appliance 1000 has a second storage rack 400, the position of the bottom of the first storage rack 300 is higher than the bottom of the second storage rack 400), meeting the lifting requirement of a large height.

[0127] In some embodiments, the value of the span L1 can be between 60mm and 190mm. Hereinafter, the value of the span L1, the limit swing angle of the swing arm 2, and the length of the swing arm 2 will be described. Taking the value of the span L1 as 235mm and the limit swing angle of the swing arm 2 as 70° as a reference example for illustration.

[0128] When the value of the span L1 is 60mm, compared with the reference example, the span is reduced by about 175mm, resulting in the arm length of the swing arm 2 being able to be shortened by about 0.7 times. When the first storage rack 300 is lifted to the top lifting limit position, the first storage rack 300 occupies a relatively small external space of the housing 200 of the household appliance 1000, saving the use space.

[0129] When the span L1 is 190 mm, compared with the reference example, the span is reduced by about 45 mm, resulting in the arm length of the swing arm 2 being able to be shortened by about 0.2 times, and the height that the first storage rack 300 is lifted being reduced by about 0.2 times. When the first storage rack 300 is lifted to the top lifting limit position, the first storage rack 300 occupies a moderate external space of the housing 200 of the household appliance 1000, and the height that the first storage rack 300 is lifted is relatively large.

[0130] In some preferred embodiments, when the span L1 is around 100 mm, the span is reduced by about 135 mm, resulting in the arm length of the swing arm 2 being able to be shortened by about 0.5 times, and the maximum height that the first storage rack 300 can be lifted being decreased by about 0.6 times. When the first storage rack 300 is lifted to the top lifting limit position, the first storage rack 300 occupies a relatively moderate external space of the housing 200 of the household appliance 1000, saving the use space, and the height that the first storage rack 300 is lifted is moderate, meeting the lifting requirement of a large height.

[0131] It can be understood that the value of the α angle and the value of the span L1 are interrelated. When the arm length of the swing arm 2 remains unchanged, the value of the α angle and the value of the span L1 are positively correlated, that is, the larger the value of the α angle, the larger the span L1, the greater the height that the first storage rack 300 can be lifted, and the closer the first storage rack 300 is to the housing of the household appliance 1000 in the front-rear direction. During the process of the lifting mechanism 100 lifting the first storage rack 300 ， the risk of interference between the first storage rack 300 and other structures provided in the upper space of the housing 200 is greater.

[0132] The value of the α angle and the value of the span L1 are positively correlated, that is, the smaller the value of the α angle, the smaller the span L1, the smaller the height that the first storage rack 300 can be lifted, and the farther the first storage rack 300 is from the housing of the household appliance 1000 in the front-rear direction. During the process of the lifting mechanism 100 lifting the first storage rack 300, the risk of interference between the first storage rack 300 and other structures provided in the upper space of the housing 200 is smaller 。

[0133] In some embodiments, the value of the α angle can be between 15° and 50°, and the corresponding value of the span L1 can be between 60 mm and 190 mm. The relevant descriptions about the value of the α angle and the value of the span L1 can be referred to above, and will not be elaborated here.

[0134] The upper swing limit position of the swing arm 2 defines the upper swing limit position of the swing arm 2. When considering the lower swing limit position of the swing arm 2 and taking the swing angle of the same swing arm 2 between the lower swing limit position and the upper swing limit position as the consideration object, in some embodiments, please continue to refer to Figure 15 , the swing arm 2 has a lower swing limit position corresponding to the bottom lifting position of the first storage rack 300. The swing arm 2 has a swing angle defined between the upper swing limit position and the lower swing limit position. The swing angle is set as an obtuse angle. With this setting, the swing angle of the swing arm 2 is increased, so that the first storage rack 300 can move to a higher position, raising the height of the first storage rack 300, reducing the frequency of bending over of the user during use, and improving the user experience.

[0135] The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. An obtuse angle is in the angle range greater than 90° and less than 180°. In this embodiment, the swing angles of the two swing arms 2 are exactly the same.

[0136] Please refer to Figure 15 , Figure 15 shows the lower swing limit position and the upper swing limit position of the swing arm 2. The swing angle is the included angle between the same swing arm 2 at the lower swing limit position and the upper swing limit position. In the embodiment where the swing arm 2 is provided with two, the swing angles of the two swing arms 2 are set to be the same.

[0137] In the technical solution of the present utility model, the specific angle value of the swing angle is not limited, as long as it is an obtuse angle. In some embodiments, please continue to refer to Figure 15 , the swing angle is β, and β is greater than 90° and less than or equal to 160°. The larger the swing angle, the greater the lifting height of the first storage rack 300. Considering that the swing arm 2 needs to cooperate with other structures to achieve lifting, and also considering some interference factors and the structural strength of the swing arm 2, setting the maximum angle of the included angle to 160° is a relatively reasonable value.

[0138] It should be noted that the swing angle can be an integer value of 160°, or any integer value between 90° and 160°, such as 100°, 110°, 120°, 130°, 140°, 150°, etc. Of course, it can also be an angular value between any two of the above integers. For example, the degrees between 90° and 100° can be 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, etc. It can also be the degrees between 100° and 110°; it can also be the degrees between 110° and 120°; it can also be the degrees between 120° and 130°; it can also be the degrees between 130° and 140°; it can also be the degrees between 140° and 150°; it can also be the degrees between 150° and 160°. Of course, it can also be some decimal angular values. The above values are all within the protection scope of the present utility model.

[0139] When the swing arm 2 is at the lower swing limit position, the swing arm 2 can be inclined, that is, the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in an inclined manner; of course, the swing arm 2 can also be vertical, that is, the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in a vertical state.

[0140] In the embodiment where the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in an inclined manner, an included angle is formed between the connection line of the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 of the same swing arm 2 and the up-down direction. At this time, the swing angle of the swing arm 2 between the lower swing limit position and the upper swing limit position can be an acute angle, a right angle or an obtuse angle with a relatively small angle.

[0141] In the embodiment where the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in a vertical state, the connection line of the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 of the same swing arm 2 extends along the up-down direction. At this time, the swing angle of the swing arm 2 between the lower swing limit position and the upper swing limit position is set as an obtuse angle.

[0142] Therefore, whether the lower swing limit position of the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in an inclined manner or in a vertical state, the value of the swing angle β is set as an obtuse angle, which can ensure that the value of the α angle is greater than 0. Compared with the swing arm 2 being in a horizontal state, the first storage rack 300 can swing up to a greater height, reducing the frequent bending of the user during operation and improving the user experience.

[0143] It can be understood that the value of the swing angle β is determined by the upper swing limit position and the lower swing limit position of the swing arm 2. The upper swing limit position of the swing arm 2 is determined by the value of the α angle. The larger the value of the α angle, the larger the swing angle β. The lower swing limit position of the swing arm 2 is determined by the angle between the swing arm 2 and the vertical plane. In some embodiments, the larger the angle between the swing arm 2 and the vertical plane, the smaller the swing angle β. Therefore, on the premise that the upper swing limit position of the swing arm 2 remains fixed, when the swing arm 2 enters in an inclined state, the defined swing angle β is smaller than when the swing arm 2 enters in a vertical state. Therefore, the following mainly describes the case where the swing arm 2 enters in a vertical state.

[0144] When the limit value of the β angle is 160°, the corresponding value of the α angle is 70°. The first storage rack 300 can be lifted to a relatively high position (in the embodiment where the household appliance 1000 has a second storage rack 400, the position of the bottom of the first storage rack 300 is higher than the bottom of the second storage rack 400), and at this time, the first storage rack 300 is as close as possible to the housing 200 of the household appliance 1000, meeting the requirement of a large lifting height, and at the same time reducing the interference risk during the movement of the first storage rack 300.

[0145] After the first storage rack 300 is lifted to the top limit position, after the items to be placed are taken and placed in the first storage rack 300, the first storage rack 300 needs to be lowered and retracted. During the process of lowering and retracting the first storage rack 300, the user needs to apply a driving force to the first storage rack 300 so that the swing arm 2 swings downward with the first hinge mounting portion 21 as the rotation center. The value of the β angle determines the value of the α angle. As described above, the value of the β angle also affects the force applied by the user.

[0146] Specifically, when the value of the β angle is larger, the force arm for the user to press down the first storage rack 300 is smaller, and the force required to lower and retract the first storage rack 300 is larger. When the value of the β angle is smaller, the force arm for the user to press down the first storage rack 300 is larger, and the force required to lower and retract the first storage rack 300 is smaller.

[0147] Regarding the value of the β angle, various factors such as the lifting height of the first storage rack 300, the interference risk between the first storage rack 300 and other structures in the upper space of the housing 200, and the force required to lower and retract the first storage rack 300 need to be considered. When the value of the β angle is below 160°, the interference risk between the first storage rack 300 and other structures in the upper space of the housing 200 is smaller. ，No further detailed description will be made for this element hereinafter.

[0148] In some embodiments, the value of the β angle can be between 105° and 140°. The first storage rack 300 can be lifted to a relatively high appropriate position, and the force required to lower and then place the first storage rack 300 back is moderate.

[0149] The following will be described in terms of the value of the β angle, the lifting height of the first storage rack 300, and the force required to lower and then place the first storage rack 300 back, and a reference example with the value of the β angle being 160° will be used for illustration.

[0150] When the value of the β angle is 105°, compared with the reference example, the angle decreases by 55°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.7 times, and the force arm of the force for the user to press down the first storage rack 300 increasing by approximately 1.8 times. The increase in the force arm is obvious, and it is more labor-saving for the user to operate. When the value of the β angle is 105°, more emphasis is placed on the force required to lower and then place the first storage rack 300 back. In this embodiment, the first storage rack 300 can be lifted to a relatively large appropriate height position, and the force required for the user to lower and then place the first storage rack 300 back is small, making it easier and more convenient to operate the household appliance 1000 and improving the user experience.

[0151] When the value of the β angle is 140°, compared with the reference example, the angle decreases by 20°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.2 times, and the force arm of the force for the user to press down the first storage rack 300 increasing by approximately 1.2 times. The amplitude of the height decrease is obvious, and the first storage rack 300 can be at a relatively large height. When the value of the β angle is 140°, more emphasis is placed on the lifting height of the first storage rack 300. In this embodiment, it can ensure that the force required to lower and then place the first storage rack 300 back is moderate, and the first storage rack 300 can be lifted to an appropriate relatively high position as much as possible, meeting the large height lifting requirement of the first storage rack 300.

[0152] In some preferred embodiments, when the value of the β angle is around 115°, compared with the reference example, the angle decreases by 45°, resulting in the maximum height that the first storage rack 300 can be lifted decreasing by approximately 0.6 times, and the amplitude of the height decrease is moderate; the force arm of the force for the user to press down the first storage rack 300 increases by approximately 1.6 times, and the increase in the force arm is moderate, taking into account both the lifting height of the first storage rack 300 and the force required to lower and then place the first storage rack 300 back.

[0153] In one embodiment, please refer to Figure 5 、Figure 9 , Figure 14 , Figure 21 , the lifting mechanism 100 further includes a first guide rail 4. The first guide rail 4 includes multiple sections of slide rails that are telescopically and slidably connected to each other. The multiple sections of slide rails at least include a first section of slide rail 41 and a last section of slide rail 42. The first section of slide rail 41 is connected to the connecting member, and the last section of slide rail 42 is used to connect to the first storage rack 300 of the household appliance 1000, so that the first storage rack 300 can be switched between a bottom storage position and a bottom position to be lifted. By the telescopic movement of the first guide rail 4, the positional relationship between the first storage rack 300 and the connecting member can be adjusted. In this way, the first storage rack 300 can be moved to the bottom storage position and stored in the accommodation cavity 201.

[0154] After the lifting mechanism 100 lifts the first storage rack 300 to a suitable position, it is necessary to lock the first storage rack 300 to prevent the first storage rack 300 from falling back due to gravity rather than being manually operated, which will reduce the user experience. In some embodiments, please refer to Figures 21 - 23 , the lifting mechanism 100 further includes a locking structure 5. The locking structure 5 is used to make the swing arm 2 and the first storage rack 300 relatively stop rotating after the first storage rack 300 is lifted, that is, the first storage rack 300 is locked by the locking structure 5, so that the swing arm 2 and the first storage rack 300 relatively stop rotating. During the user's use process, except for manual unlocking, the swing arm 2 and the first storage rack 300 always maintain a relatively non-rotating state. In this way, the user can easily operate when taking and placing the items to be placed, and the user experience is better.

[0155] In the embodiment where the first storage rack 300 is locked relative to the swing arm 2, the first storage rack 300 can be locked by moving in the front-rear direction, such as locking by pulling forward or pushing backward; during the swinging movement of the first storage rack 300 on the swing arm 2, it moves upward and forward. Therefore, locking by pulling forward is more in line with the user's usage habits.

[0156] In one embodiment, the lifting mechanism 100 further includes a connecting member. The locking structure 5 includes a locking member 5a that can be movably installed relative to the connecting member in the front-rear direction. The locking member 5a is used to be installed on the first storage rack 300.

[0157] It should be noted that in the front-locking manner, the first storage rack 300 moves forward and locks relative to the swing arm 2. That is, for the first storage rack 300, when the first storage rack 300 is at the top lifting limit position, the first storage rack 300 continues to move forward to correspond to the top locking position. There is a horizontal distance difference between the top lifting limit position and the top locking position of the first storage rack 300, which are two different positions.

[0158] A sliding fit structure is provided between the locking member 5a and the swing arm 2. During the forward movement of the locking member 5a relative to the connecting member, the sliding fit structure slides to enable the first storage rack 300 to move from the top lifting limit position to the top locking position correspondingly. Through the cooperation of the sliding fit structure, the front-locking of the first storage rack 300 can be realized, without the need to additionally provide complex locking and unlocking mechanisms, making the user operation more convenient.

[0159] In the technical solution of the present utility model, the specific structural form of the sliding fit structure is not limited. For example, for two mutually cooperating structures, one can be a shaft, and the other can be a rib or a groove, or a cooperation method that is partly rib and partly groove.

[0160] In an embodiment, please refer to Figures 21 - 23 , the sliding fit structure includes a mating chute and a sliding shaft that slide with each other. At least one of the mating chutes includes a horizontal groove section 5111 extending in the front-rear direction. When the locking member 5a moves forward relative to the connecting member, the corresponding sliding shaft can slide into the horizontal groove section 5111 to stop the swing of the swing arm 2.

[0161] The horizontal groove section 5111 has an upper groove wall and a lower groove wall in the up-down direction. The sliding shaft abuts against the upper groove wall or the lower groove wall to achieve the limit in the up-down direction. At this time, the swing arm 2 stops swinging, that is, the first storage rack 300 locks relative to the swing arm 2. The sliding locking is realized through the cooperation mode of the sliding shaft and the mating chute, without the need to additionally provide other mechanisms, with a simple structure. In addition, it also conforms to the user operation habit and improves the user experience.

[0162] The present utility model does not limit the specific installation positions of the sliding shaft and the mating chute. For example, the sliding shaft can be arranged on the swing arm 2, and the mating chute can be arranged on the locking member 5a; or the sliding shaft can be arranged on the locking member 5a, and the mating chute can be arranged on the swing arm 2.

[0163] In one embodiment, the mating sliding groove may have and only have the horizontal groove section 5111. When the swing arm 2 is at the upper swing limit position, the sliding shaft is at the front notch of the horizontal groove section 5111. When the locking member 5a is pulled forward, the sliding shaft slides backward into the horizontal groove section 5111. When the swing arm 2 does not reach the upper swing limit position, the sliding shaft may be outside the locking member 5a or the swing arm 2.

[0164] In one embodiment, the mating sliding groove further includes an arc groove section 5112. The extension path of the arc groove section 5112 is adapted to the rotation of the sliding shaft. That is, during the entire swing stroke of the swing arm 2, the sliding shaft is always within the arc groove section 5112, improving the stability of the swing arm 2 during the swinging process.

[0165] The mating sliding groove may be provided on the locking member 5a or on the swing arm 2. In one embodiment, the mating sliding groove is provided on the locking member 5a. Two sets of the sliding fit structures are provided. The sliding shafts of the two sets of the sliding fit structures are both provided on the same swing arm 2, and the mating sliding grooves of the two sets of the sliding fit structures are both provided on the locking member 5a. By providing two sets of the sliding fit structures, the locking stability of the first storage rack 300 is improved.

[0166] Since the positions of the sliding shafts of the two sets of the sliding fit structures relative to the second hinge mounting portion 22 are different, therefore, their corresponding rotation radii are different, and the corresponding rotation arc trajectories are different. For the same locking member 5a, the trajectory lines formed on the locking member 5a are different.

[0167] Specifically, the two sliding shafts include a first sliding shaft 513 adjacent to the second hinge mounting portion 22 and a second sliding shaft 514 away from the second hinge mounting portion 22.

[0168] The two mating sliding grooves include a first mating sliding groove 511 corresponding to the first sliding shaft 513 and a second mating sliding groove 512 corresponding to the second sliding shaft 514. The inlet of the first mating sliding groove 511 is opened at the lower end of the locking member 5a, and the inlet of the second mating sliding groove 512 is opened at the front end of the locking member 5a. By introducing at different positions, the stability of the first storage rack 300 during the lifting process is better.

[0169] The guiding inlet of the first mating sliding groove 511 is formed at the lower side end of the locking member 5a, and the guiding inlet of the second mating sliding groove 512 is formed at the front side end of the locking member 5a. When the first sliding shaft 513 and the second sliding shaft 514 are respectively and correspondingly installed, and corresponding to the swing of the swing arm 2 between the lower swing limit position and the upper swing limit position, the first sliding shaft 513 and the second sliding shaft 514 stagger and perform similar horizontal sliding and vertical sliding, so that the first storage rack 300 is in a stable state.

[0170] The first storage rack 300 is connected to the locking member 5a. In order to enable the first storage rack 300 to linearly move relative to the connecting member in the front-rear direction, as described in the foregoing part, a first guide rail 4 is provided between the connecting member and the locking member 5a. Through the relative movement between the first section slide rail 41 and the last section slide rail 42 of the first guide rail 4, the first storage rack 300 can linearly move relative to the connecting member in the front-rear direction.

[0171] In the embodiment where two swing arms 2 are provided, the above-mentioned locking structure 5 can be provided on both of the two swing arms 2. By providing two locking structures 5 to respectively lock the two swing arms 2 and repeating the locking, the locking of the first storage rack 300 at the top locking position is more reliable, reducing the risk of self-dropping.

[0172] In one embodiment, the locking structure 5 only makes one of the swing arms 2 and the first storage rack 300 relatively stop rotating, and any one of the two swing arms 2 can be used.

[0173] In order to ensure the stability of the lifting mechanism 100 during the process of lifting the first storage rack 300, the lifting mechanism 100 adopts a four-bar linkage mechanism, that is, in the form of the fixed arm 1, the two swing arms 2 and the connecting member. The four-bar linkage mechanism is set as a parallelogram linkage mechanism. Therefore, for the installation positions of the two swing arms 2 on the fixed arm 1, one can be above and the other can be below. In one embodiment, when the two swing arms 2 are both in the lower swing limit position, the two swing arms 2 include a first swing arm 2a on the left side and a second swing arm 2b on the right side. The installation position of the first swing arm 2a on the fixed arm 1 is lower, and the installation position of the second swing arm 2b on the fixed arm 1 is higher.

[0174] For the two sliding shafts, they are both provided on the second swing arm 2b. In this way, when the second swing arm 2b corresponds to the upper swing limit position, the upper end of the second swing arm 2b is higher than the upper end of the first swing arm 2a. At this time, it is convenient for the second swing arm 2b to cooperate with the locking member 5a provided on the storage rack for locking.

[0175] In addition, it should be noted that within the household appliance 1000, two of the lifting mechanisms 100 are provided and are spaced apart in the left-right direction, that is, two support points are formed on both sides of the first storage rack 300 in the left-right direction. By providing the two lifting mechanisms 100, the first storage rack 300 can be stably lifted.

[0176] Of course, in the embodiment where two of the lifting mechanisms 100 are provided, two or four of the swing arms 2 can be correspondingly provided to jointly support the first storage rack 300.

[0177] In the lifting mechanism 100, for the swing arm 2 and the fixed arm 1, a damping structure such as a gas strut or a spring can be provided between the swing arm 2 and the fixed arm 1 to reduce the force exerted by the user during the process of lifting or lowering the first storage rack 300.

[0178] The following will elaborate on some specific structures of the household appliance 1000 in detail in combination with some features of the lifting mechanism 100 proposed in the present utility model.

[0179] The household appliance 1000 includes a housing 200. The housing 200 forms a receiving cavity 201. An opening is also provided on the front side of the housing 200. A door body is provided at the opening. When the door body is opened to an appropriate position to open the opening, the user can pull out the first storage rack 300 at this time, and with the cooperation of the lifting mechanism 100, the first storage rack 300 can be lifted and extended out of the receiving cavity 201 for the user to take out or put in the items to be placed.

[0180] The receiving cavity 201 has a rear wall opposite to the opening and two side walls on both sides of the rear wall. The fixed arm 1 is fixed to the side walls. The swing arm 2 of the lifting mechanism 100 moves inside and outside the receiving cavity 201 with the connection position of the side walls as the hinge point to achieve the lifting of the first storage rack 300.

[0181] Correspondingly, within the household appliance 1000, the first storage rack 300 can have two positions such as a bottom position to be lifted and a top lifting limit position; considering the embodiment where the first storage rack 300 can move relative to the connecting member in the front-rear direction, the first storage rack 300 can have three positions such as a bottom storage position, a bottom position to be lifted, and a top lifting limit position; considering the embodiment where the first storage rack 300 can be locked in the forward direction relative to the connecting member, the first storage rack 300 can have four positions such as a bottom storage position, a bottom position to be lifted, a top lifting limit position, and a top locking position.

[0182] In some household appliances 1000, there is only one storage rack, some have two, and some have more. In the technical solution of the present utility model, please refer to Figure 17 and Figure 18 , a second storage rack 400 is further provided in the accommodation cavity 201. Corresponding to the top lifting limit position, the lower end of the first storage rack 300 protrudes upward from the lower end of the second storage rack 400, that is, at the lifting limit position of the first storage rack 300, the lifting height of the first storage rack 300 is higher than that of the second storage rack 400. At this time, the lifting height is relatively large, reducing the frequency of users bending down and improving the user experience.

[0183] It should be noted that in the embodiment where there are two storage racks in the household appliance 1000, the first storage rack 300 is the lower storage rack, and the second storage rack 400 is the upper storage rack. When the first storage rack 300 is in the top storage position and the second storage rack 400 is in the accommodation cavity 201, the first storage rack 300 is located below the second storage rack 400 and they are arranged opposite to each other.

[0184] In view of the above-mentioned some embodiments, users need to alternately use the first storage rack 300 and the second storage rack 400, that is, when using the first storage rack 300 to lift, try to keep the second storage rack 400 in the accommodation cavity 201; when using the second storage rack 400, try to keep the first storage rack 300 in the accommodation cavity 201, or try not to lift the second storage rack 400.

[0185] Certainly, for the upper ends of the first storage rack 300 and the second storage rack 400, in one embodiment, corresponding to the top lifting limit position and the top lifting locking position of the first storage rack 300, the upper end of the first storage rack 300 protrudes upward from the upper end of the second storage rack 400, that is, on the premise that the depths of the first storage rack 300 and the second storage rack 400 are the same, the first storage rack 300 can be in a higher position.

[0186] Corresponding to the product where the household appliance 1000 is a dishwasher, the first storage rack 300 corresponds to the lower dish basket of the dishwasher, and the second storage rack 400 corresponds to the upper dish basket of the dishwasher. When using the lower dish basket of the dishwasher, the lifting mechanism 100 lifts the lower dish basket of the dishwasher to a position higher than the upper dish basket. This state has the same operating height as when the user uses the upper dish basket of the dishwasher, or a slightly higher height, and the user's operating experience will be better.

[0187] The following describes the process of the user using the household appliance 1000 with reference to the relevant structure of the household appliance 1000, taking the first storage rack 300 as a reference:

[0188] 1. The first storage rack 300 is in the bottom storage position, as Figures 3 - 6 shown:

[0189] This state is when the user has not used, or has just started using, or has finished using. In these states, the first storage rack 300 is within the accommodation cavity 201 of the household appliance 1000. As can be seen from Figures 3 - 6 it, the first storage rack 300 is retracted into the accommodation cavity 201. At this time, the distance between the first section slide rail 41 and the last section slide rail 42 of the first guide rail 4 is the smallest or the overlapping distance is the largest, and the swing arm 2 is at the lower limit position.

[0190] 2. The first storage rack 300 is in the bottom waiting to be lifted position, as Figures 7 - 11 shown:

[0191] This state is when the user pulls out the first storage rack 300 from the accommodation cavity 201, or when the user lowers the first storage rack 300 after using it. In these states, the first storage rack 300 is at the opening of the accommodation cavity 201. As can be seen from Figures 7 - 11 it, at this time, the distance between the first section slide rail 41 and the last section slide rail 42 of the first guide rail 4 is relatively large or the overlapping distance is small. The first storage rack 300 has moved forward a certain distance relative to the accommodation cavity 201, and the swing arm 2 is still at the lower limit position.

[0192] 3. The first storage rack 300 is in the top lift limit position, as Figures 12 - 18 shown:

[0193] This state is when the user lifts the first storage rack 300, or when the user exits the locked state after using the first storage rack 300. In these states, the first storage rack 300 is at the maximum lifted height. As can be seen from Figures 12 - 18 it, at this time, the distance between the first section slide rail 41 and the last section slide rail 42 of the first guide rail 4 is relatively large or the overlapping distance is small, and it has not changed compared to the distance or overlapping distance when the first storage rack 300 is in the bottom waiting to be lifted position. The swing arm 2 is at the upper limit position.

[0194] 4. The first storage rack 300 is in the top locked position, as Figures 19 - 23 shown:

[0195] This state is a locked state after the user lifts the first storage rack 300. At this time, the user can pick up and place the items to be placed. In these states, the first storage rack 300 is at the maximum lifted height. From Figures 19 - 23 It can be seen that at this time, the distance between the first section of the slide rail 41 and the last section of the slide rail 42 of the first guide rail 4 is the largest or the overlapping distance is the smallest. The first storage rack 300 moves forward a certain distance at the top locked position relative to its position at the top lifting limit position, and the swing arm 2 is still at the upper swing limit position.

[0196] The following will be introduced with a complete usage process of the user:

[0197] When the user needs to use the household appliance 1000, first open the door of the household appliance 1000. The user pulls the first storage rack 300 forward from the bottom storage position out of the accommodation cavity 201 to the bottom position to be lifted; under the swinging action of the swing arm 2 of the lifting mechanism 100, the user continues to pull the first storage rack 300 forward and upward at the same time, so that the first storage rack 300 moves from the bottom position to be lifted to the top lifting limit position; the user continues to pull the first storage rack 300 forward, and the first storage rack 300 moves from the top lifting limit position to the top locked position. In the locked state, the user can pick up and place the items to be placed in the first storage rack 300 under the condition of reducing the frequency of bending down.

[0198] When the user finishes picking up and placing the items to be placed, the user pushes the first storage rack 300 backward to unlock the first storage rack 300, and the first storage rack 300 moves from the top unlocked position to the top lifting limit position; the user lowers the first storage rack 300 so that the first storage rack 300 moves from the top lifting limit position to the bottom position to be lifted; the user continues to push the first storage rack 300 backward so that the first storage rack 300 moves from the bottom position to be lifted to the bottom storage position. When the first storage rack 300 is in the bottom storage position, the user can close the door to complete the use of the household appliance 1000.

[0199] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A lifting mechanism for lifting a first storage rack of a household appliance, enabling the first storage rack to be lifted and lowered between a bottom position to be lifted and a top lifting limit position, characterized in that, The lifting mechanism includes: A fixed arm; and Two swing arms, at least partially opposite to each other in the front-rear direction. At both ends of each swing arm, a first hinge mounting portion and a second hinge mounting portion are correspondingly provided. Each first hinge mounting portion is mounted on the fixed arm, and each second hinge mounting portion is used to directly or indirectly mount on the first storage rack. Each swing arm has an upper swing limit position and a lower swing limit position. The lower swing limit position is used to enable the first storage rack to be in the bottom position to be lifted, and the upper swing limit position is used to enable the first storage rack to be in the top lifting limit position; At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in contact.

2. The lifting mechanism according to claim 1, characterized in that, At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in close contact.

3. The lifting mechanism according to claim 2, characterized in that, A first connection line is formed by the rotation centers of the first hinge mounting portion and the second hinge mounting portion of the same swing arm; The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, and the first side edge is parallel to the first connection line.

4. The lifting mechanism according to claim 2, characterized in that, A first connection line is formed by the rotation centers of the first hinge mounting portion and the second hinge mounting portion of the same swing arm. At the lower swing limit position, the first connection line extends in the up-down direction.

5. The lifting mechanism according to claim 2, characterized in that, The opposite side surfaces of the two swing arms include a first side surface and a second side surface. The first side surface is convexly provided with a contact convex portion facing the second side surface, where: At the lower swing limit position, the contact convex portion avoids the second side surface; at the upper swing limit position, the contact convex portion contacts the second side surface; or At the lower swing limit position, the contact convex portion contacts the second side surface, and at the upper swing limit position, the contact convex portion avoids the second side surface.

6. The lifting mechanism according to claim 5, characterized in that The two swing arms include a first swing arm at the rear and a second swing arm at the front at the lower swing limit position; The first side surface is located on the second swing arm; The contact convex portion is provided at one end of the second swing arm where the first hinge mounting portion is provided.

7. The lifting mechanism according to claim 6, characterized in that, In the second swing arm, a first connection line is formed by the rotation centers of the first hinge mounting portion and the second hinge mounting portion; The side surface of the contact convex portion has a second side edge in the length direction of the second swing arm, and the second side edge is parallel to the first connection line.

8. The lifting mechanism according to claim 7, characterized in that, In the second swing arm, the distance between the rotation center of the second hinge mounting portion and the second side edge of the contact convex portion is L7, and 10mm ≤ L7 ≤ 30mm.

9. The lifting mechanism according to claim 1, characterized in that, At the upper swing limit position, the two swing arms are used to upwardly support the first storage rack, and in the direction from the rear to the front, each swing arm is upwardly inclined.

10. The lifting mechanism according to claim 9, characterized in that, At the upper swing limit position, the included angle between the connection line of the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm and the horizontal direction is α, and 0° < α ≤ 70°; and / or At the upper swing limit position, the vertical drop between the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm is L1, and 0 < L1 ≤ 235 mm.

11. The lifting mechanism according to claim 1, characterized in that, The same swing arm has a swing angle defined between the upper swing limit position and the lower swing limit position, and the swing angle is set as an obtuse angle.

12. The lifting mechanism according to claim 11, characterized in that, The swing angle is β, and 90° < β ≤ 160°.

13. A household appliance, characterized in that, Comprising: A housing, forming a receiving cavity; A lifting mechanism, including the lifting mechanism according to any one of claims 1 to 12, wherein the fixed arm of the lifting mechanism is provided on the side wall of the receiving cavity; and, A first storage rack, directly or indirectly hinged to the two swing arms of the lifting mechanism; The lifting mechanism enables the first storage rack to switch between a bottom position to be lifted and a top lifting limit position.

14. The household appliance according to claim 13, characterized in that, A second storage rack is further provided in the receiving cavity. Corresponding to the top lifting limit position, the lower end of the first storage rack protrudes upward from the lower end of the second storage rack.

15. The household appliance according to claim 14, characterized in that, The household appliance includes a dishwasher, the first storage rack is provided as a lower dish basket; the second storage rack is provided as an upper dish basket.

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