Household appliance

Abstract

The household appliance comprises a shell, a first storage rack, a second storage rack and a lifting mechanism, a containing cavity is formed in the shell, the second storage rack is arranged on the upper portion of the containing cavity through a second guide rail, and the lifting mechanism comprises a fixed arm and at least one swing arm. A first hinge mounting part and a second hinge mounting part are formed on the same swing arm, the first hinge mounting part is mounted on the fixed arm, and the second hinge mounting part is directly or indirectly mounted on the first storage rack; in the vertical direction, the rotating center of the first hinged installation part is located between the position below the second guide rail and a set position below the bottom of the second storage rack, the difference between the set position and the bottom of the second storage rack is L2, and L2 is larger than or equal to 0 and smaller than or equal to 10 mm. According to the storage rack, the first hinge mounting part is arranged at the upper position, so that the first storage rack can be lifted to a larger height, frequent stooping of a user in operation is reduced, and the user experience is improved.

Description

[0001] This application claims the priority of a Chinese patent application with the application number 202410541707.7 and the application title "Lifting Mechanism and Dishwasher", which was filed with the Chinese Patent Office on April 30, 2024. The entire content of this Chinese patent application is incorporated herein by reference. Technical Field

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

[0003] In household appliances with an internal space, movable storage structures such as a storage rack that can extend from the interior of the household appliance are usually configured. There are some movable storage structures in the prior art 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. 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 purpose of the utility model is to propose a household appliance, aiming to optimize the existing lifting mechanism to reduce the frequency of bending over during user operation and improve the user experience. In the solution of realizing a large-height lifting of the storage rack of the household appliance, how to set the position of the lifting mechanism inside the household appliance is an urgent problem to be solved.

[0006] To achieve the above object, the utility model proposes a household appliance, which includes:

[0007] A housing, forming an accommodation cavity;

[0008] A first storage rack and a second storage rack, the second storage rack is arranged at the upper part of the accommodation cavity through a second guide rail; and,

[0009] A lifting mechanism, including a fixed arm and at least one swing arm. The fixed arm is used to be installed in the accommodation cavity of the household appliance. On the same swing arm, a first hinge mounting part and a second hinge mounting part are formed. The first hinge mounting part is mounted on the fixed arm, and the second hinge mounting part is used to directly or indirectly mount on the first storage rack;

[0010] Wherein, in the vertical direction, the rotation center of the first hinge mounting portion is between a set position below the second guide rail and below the bottom of the second storage rack, the drop between the set position and the bottom of the second storage rack is L2, and 0≤L2≤10mm.

[0011] In some embodiments, a front opening communicating with the accommodation cavity is provided on the front end face of the housing, the horizontal distance between the rotation center of the first hinge mounting portion and the front end face of the housing is L3, and 30mm≤L3≤120mm.

[0012] In some embodiments, the swing arm has a lower swing limit position. Corresponding to the lower swing limit position, the distance between the second hinge mounting portion and the bottom wall of the accommodation cavity is L4, and 10mm≤L4≤60mm.

[0013] In some embodiments, two swing arms are provided. The first hinge mounting portions of the two swing arms are both mounted on the fixed arm, and the second hinge mounting portions of the two swing arms are both directly or indirectly mounted on the first storage rack, wherein:

[0014] Among the two first hinge mounting portions of the two swing arms, the first hinge mounting portion that is above and in the front is the first upper hinge mounting portion, and the rotation center of the first upper hinge mounting portion is between the lower end of the second guide rail and a set position below the bottom of the second storage rack; and / or,

[0015] Each swing arm has a lower swing limit position. Corresponding to the lower swing limit position, among the two second hinge mounting portions of the two swing arms, the second hinge mounting portion that is below and in the rear is the second lower hinge mounting portion, and the distance between the rotation center of the second lower hinge mounting portion and the bottom wall of the accommodation cavity is L5, and 10mm≤L5≤60mm.

[0016] In some embodiments, the lifting mechanism is used to lift the first storage rack of the household appliance, so that the first storage rack can be switched between a bottom position to be lifted and a top lifting limit position;

[0017] The swing arm has an upper swing limit position for enabling the first storage rack to be in the top lifting limit position. At the upper swing limit position, the swing arm is used to support the first storage rack upward, and in the direction from the rear to the front, the swing arm is inclined upward.

[0018] In some embodiments, corresponding to 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°.

[0019] In some embodiments, corresponding to the upper swing limit position, the span in the vertical direction between the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm is L, and 0 < L ≤ 235 mm.

[0020] In some embodiments, the swing arm further has a lower swing limit position for enabling the first storage rack to be in the bottom position to be lifted.

[0021] The 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.

[0022] In some embodiments, the swing angle is β, and 90° < β ≤ 160°.

[0023] In some embodiments, the lifting mechanism further includes a connecting member and a first guide rail. The second hinge mounting portion of the swing arm is connected to the connecting member. The first guide rail includes multiple sections of sliding rails that are telescopically and slidably connected to each other. The multiple sections of sliding rails at least include a first section of sliding rail and a last section of sliding rail. The first section of sliding rail is connected to the connecting member, and the last section of sliding rail is used to connect the first storage rack of the household appliance so that the first storage rack can be switched between the bottom storage position and the bottom position to be lifted.

[0024] In some embodiments, the lifting mechanism further includes a locking structure for making the swing arm and the first storage rack relatively stop rotating after the first storage rack is lifted.

[0025] In some embodiments, the lifting mechanism further includes a connecting member. The second hinge mounting portion of at least one swing arm is mounted on the connecting member. The locking structure includes a locking member that is movably mounted relative to the connecting member in the front-rear direction, and the locking member is used to be mounted on the first storage rack.

[0026] A sliding fit structure is provided between the locking member and the swing arm. During the process of the locking member moving relative to the connecting member in the front-rear direction, the sliding fit structure slides to enable the first storage rack to move from the top lifting limit position to the top locking position correspondingly.

[0027] In some embodiments, the sliding fit structure includes a mating chute and a sliding shaft that are slidably mated with each other.

[0028] At least one of the mating chutes includes an arc-shaped groove section, and the extension path of the arc-shaped groove section at least partially adapts to the rotation of the sliding shaft.

[0029] When the locking member moves forward relative to the connecting member, the corresponding sliding shaft can slide into the tail of the arc-shaped groove section to stop the swing of the swing arm.

[0030] In some embodiments, a locking rib is provided on the inner side wall at the tail of the arc-shaped groove section to limit the sliding shaft within the arc-shaped groove section.

[0031] In some embodiments, the sliding fit structure includes a mating chute and a sliding shaft that slide fit with each other;

[0032] At least one of the mating chutes includes an arc-shaped groove section and a horizontal groove section. The extension path of the arc-shaped groove section adapts to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arc-shaped groove section and extends from front to back;

[0033] The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the horizontal groove section to stop the swing of the swing arm.

[0034] In some embodiments, two swing arms are provided, and the lifting mechanism further includes a connecting member. The first hinge mounting portions of the two swing arms are both hinged to the connecting member, and the connecting member is used to connect to the first storage rack.

[0035] In some embodiments, the first storage rack has a top lifting limit position. 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.

[0036] In some embodiments, the household appliance includes a dishwasher, the first storage rack is provided as a lower dish basket, and the second storage rack is provided as an upper dish basket.

[0037] In the technical solution of the present utility model, the household appliance includes a housing, a first storage rack, a second storage rack, and a lifting mechanism. The housing forms a receiving cavity. The second storage rack is provided in the upper part of the receiving cavity through a second guide rail. The lifting mechanism includes a fixed arm and at least one swing arm. The fixed arm is used to be installed in the receiving cavity of the household appliance. A first hinge mounting portion and a second hinge mounting portion are formed on the same swing arm. The first hinge mounting portion is installed on the fixed arm, and the second hinge mounting portion is used to directly or indirectly install on the first storage rack; wherein, in the up and down direction, the rotation center of the first hinge mounting portion is between a set position below the second guide rail and below the bottom of the second storage rack. The drop between the set position and the bottom of the second storage rack is L2, and 0≤L2≤10 mm. By setting the first hinge mounting portion in a higher position, the first storage rack can be at a greater height at the top lifting limit position, the first storage rack can be lifted to a greater height, reducing the frequent bending of the user during operation and improving the user experience. Description of the Drawings

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0039] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of a household appliance provided by the present invention (the first storage rack is in the bottom storage position, and the swing arm of the lifting mechanism is in the lower limit position);

[0040] Figure 2 For Figure 1 Front view structural schematic diagram of the household appliance in;

[0041] Figure 3 For Figure 1 Schematic diagram of the three-dimensional structure including the lifting mechanism and the first storage rack in;

[0042] Figure 4 For Figure 1 Front view structural schematic diagram including the lifting mechanism and the first storage rack in;

[0043] Figure 5 For Figure 1 Schematic diagram of the three-dimensional structure of the household appliance in (the first storage rack is in the bottom position to be lifted, and the swing arm of the lifting mechanism is in the lower limit position);

[0044] Figure 6 For Figure 5 Front view structural schematic diagram of the household appliance in;

[0045] Figure 7 For Figure 5 Schematic diagram of the three-dimensional structure of a part of the household appliance in;

[0046] Figure 8 For Figure 7 Enlarged schematic diagram of local area A in;

[0047] Figure 9 For Figure 7 Enlarged schematic diagram of local area B in;

[0048] Figure 10 For Figure 5 Front view structural schematic diagram including the lifting mechanism and the second storage rack in;

[0049] Figure 11 For Figure 5 Schematic diagram of the three-dimensional structure including the lifting mechanism and the first storage rack in;

[0050] Figure 12 is Figure 5 The front view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack;

[0051] Figure 13 is Figure 5 The partial sectional view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack;

[0052] Figure 14 is Figure 1 The three-dimensional structural schematic diagram of the household appliance in which the first storage rack is at the top lifting limit position and the swing arm of the lifting mechanism is at the upper swing limit position;

[0053] Figure 15 is Figure 14 The front view structural schematic diagram of the household appliance;

[0054] Figure 16 is Figure 14 The three-dimensional structural schematic diagram of the household appliance containing the lifting mechanism, the first storage rack and the second storage rack;

[0055] Figure 17 is Figure 14 The front view structural schematic diagram of the household appliance containing the lifting mechanism, the first storage rack and the second storage rack;

[0056] Figure 18 is Figure 14 The three-dimensional structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack;

[0057] Figure 19 is Figure 14 The front view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack (one embodiment);

[0058] Figure 20 is Figure 19 The partial sectional view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack;

[0059] Figure 21 is Figure 14 The front view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack (another embodiment);

[0060] Figure 22 is Figure 21 The partial sectional view structural schematic diagram of the household appliance containing the lifting mechanism and the first storage rack;

[0061] Figure 23 is Figure 1 The three-dimensional structural schematic diagram of the household appliance in which the first storage rack is at the top locking position and the swing arm of the lifting mechanism is at the upper swing limit position;

[0062] Figure 24 is Figure 23 the front view structural schematic diagram of the household appliance in

[0063] Figure 25 is Figure 23 the three-dimensional structural schematic diagram of the lifting mechanism and the first storage rack included in

[0064] Figure 26 is Figure 23 the front view structural schematic diagram of (an embodiment) of the lifting mechanism and the first storage rack included in

[0065] Figure 27 is Figure 26 the partial sectional view structural schematic diagram of the lifting mechanism and the first storage rack included in

[0066] Figure 28 is Figure 23 the front view structural schematic diagram of (another embodiment) of the lifting mechanism and the first storage rack included in

[0067] Figure 29 is Figure 28 the partial sectional view structural schematic diagram of the lifting mechanism and the first storage rack included in

[0068] Explanation of the reference numerals in the drawings:

[0069] 100, lifting mechanism; 1, fixed arm; 2, swing arm; 21, first hinge mounting part; 22, second hinge mounting part; 3, connecting piece; 4, first guide rail; 41, first section slide rail; 42, last section slide rail; 5, locking structure; 5a, locking piece; 51, sliding fit structure; 511, first fitting chute; 5111, horizontal chute section; 5112, arc chute section; 5113, rib; 512, second fitting chute; 513, first sliding shaft; 514, second sliding shaft; c, first plane reference line; e, second plane reference line; d, third plane reference line;

[0070] 1000, household appliance; 200, housing; 201, accommodating cavity; 2011, bottom wall; 2012, side wall; 300, first storage rack; 400, second storage rack; 500, second guide rail;

[0071] The implementation function characteristics and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0072] 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 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.

[0073] 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, the directional indications are only used to explain the relative position relationship, movement conditions, etc. between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0074] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the 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 ability of those of ordinary skill in the art to implement. 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.

[0075] In a household appliance with an internal space, an activity storage structure such as a storage rack that can extend from the inside of the household appliance is usually configured. In the prior art, there are some activity storage structures that have a pulling-out function and also have a lifting function.

[0076] 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 makes the lifting height of the storage rack relatively low, and users still need to bend over frequently during use, resulting in a poor user experience.

[0077] In view of this, the present utility model proposes 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 29 is a schematic structural diagram of the household appliance provided by the present utility model.

[0078] Please refer to Figures 1 to 2, 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 inside 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, dishes, plates, chopsticks, forks and knives, or baked food ingredients or items to be refrigerated, etc.

[0079] In the present utility model, taking the user as the direction reference, forward is the direction towards the user, or the direction from the back side of the household appliance 1000 towards the side where the household appliance 1000 is provided with a door; backward is the direction opposite to the forward direction, specifically the direction away from the user, or the direction from the side where the household appliance 1000 is provided with a door towards the back side of the household appliance 1000; the up-down direction is the direction with gravity as the reference.

[0080] 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 where multiple storage racks are provided in the household appliance 1000, 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.

[0081] 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 composite 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.

[0082] The first storage rack 300 has several important positions during its movement. Commonly, there are a bottom storage position (as shown in Figure 1 and Figure 2 ), a bottom position to be lifted (as shown in Figure 5 and Figure 6 ), a top lifting limit position (as shown in Figure 14 and Figure 15 ), and a top locking position (as shown inFigure 23 and Figure 24 as shown).

[0083] 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.

[0084] 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.

[0085] 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 the embodiment with only one link, the link may be set as a 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 support structures may be used to assist in supporting the swing of the swing arm 2. Of course, multiple 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 achieve synchronous swing. Therefore, a single swing arm 2 can lift the first storage rack 300 within its swing stroke.

[0086] In the combination mode 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, the stability of the first storage rack 300 during the lifting process is better, which will be described in detail in subsequent embodiments.

[0087] Therefore, corresponding to 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 lift limit position, when the swing arm 2 is at the lower swing limit position, the corresponding first storage rack 300 is at 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 lift limit position.

[0088] When the first storage rack 300 has three positions, namely the bottom storage position, the bottom position to be lifted and the top lift 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 lift limit position.

[0089] When the first storage rack 300 has four positions, namely the bottom storage position, the bottom position to be lifted, the top lift limit position and the 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 lift limit position and the top locking position.

[0090] It should be noted that the first hinge mounting portion 21 of the swing arm 2 is a fixed hinge point, and its position will not change. The swinging movement of the swing arm 2 only indicates the moving 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 moving 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.

[0091] 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 the user 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 height of the installation position, the higher the first storage rack 300 can be lifted. Conversely, the lifted height is relatively small.

[0092] 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 achieve lifting the first storage rack 300 to a relatively high position. Any one of the above two factors can be considered alone, or both factors can be considered simultaneously.

[0093] 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 higher the first storage rack 300 can be 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 higher the first storage rack 300 can be lifted. Conversely, the lifted height is relatively small. For the swing arm 2, a larger span requires the length of the swing arm 2 to be set longer.

[0094] In some embodiments, please refer to Figure 14 、 Figure 15 and Figure 19 The lifting mechanism 100 includes a fixed arm 1 and at least one swing arm 2. The fixed arm 1 is used to be installed in the accommodation cavity 201 of the household appliance 1000. A first hinge mounting portion 21 and a second hinge mounting portion 22 are formed on the same swing arm 2. The first hinge mounting portion 21 is mounted on the fixed arm 1, and the second hinge mounting portion 22 is used to be directly or indirectly mounted on the first storage rack 300.

[0095] The swing arm 2 has an upper swing limit position for enabling the first storage rack 300 to be at the top lift limit position. At the upper swing limit position, the swing arm 2 is used to upwardly support the first storage rack 300, and in the direction from back to front, the swing arm 2 is upwardly inclined.

[0096] 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 back to 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.

[0097] The number of the swing arms 2 is not limited. It can be only one or two. In the embodiment where two swing arms 2 are provided, part of the structure of the lifting mechanism 100 forms a four-bar linkage structure, and it is a parallelogram four-bar linkage mechanism.

[0098] In all the following embodiments, one swing arm 2 can be provided or two swing arms 2 can be provided, which will not be elaborated here.

[0099] The first hinge mounting portion 21 and the second hinge mounting portion 22 are mainly provided to enable the swing arm 2 to rotate relative to the fixed arm 1 and also relative to the first storage rack 300. The specific setting manner of the first hinge mounting portion 21 and the second hinge mounting portion 22 is not limited. For example, both the first hinge mounting portion 21 and the second hinge mounting portion 22 can be set in the form of holes, or both can be set in the form of shafts, or one can be in the form of a shaft and the other can be in the form of a hole.

[0100] In the technical solution of the present utility model, the included angle between the swing arm 2 and the horizontal direction at the upper swing limit position is not limited. In some embodiments, at 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 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 70° is a relatively reasonable value.

[0101] 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. All of the above values are within the protection scope of the present utility model.

[0102] 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.

[0103] 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 large-height lifting requirement of the first storage rack 300 and improves the user experience.

[0104] In some embodiments, 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 large-height lifting requirement of the first storage rack 300.

[0105] After the first storage rack 300 is lifted to the top limit position and 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 applied by the user.

[0106] 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.

[0107] For the value of the α angle, various factors 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 need to be considered. 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.

[0108] 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.

[0109] 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.

[0110] 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 about 0.7 times, and the force arm for the user to press down the first storage rack 300 increasing by about 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 α angle is 15°, more emphasis is placed on 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, and it is easier and more convenient to operate the household appliance 1000, improving the user experience.

[0111] 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.

[0112] 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.

[0113] 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 some embodiments, please continue to refer to Figure 19 , 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, and also considering some interference factors and the structural strength of the swing arm 2, setting the maximum span to 235 mm is a relatively reasonable value.

[0114] 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.

[0115] 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.

[0116] When the span L1 is 235mm, as Figure 19 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.

[0117] In some embodiments, the value of the span L1 can be between 60mm and 190mm. Hereinafter, the relationship between 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, and 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.

[0118] 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.

[0119] 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 by which 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 by which the first storage rack 300 is lifted is relatively large.

[0120] 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 by which 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 usage space, and the height by which the first storage rack 300 is lifted is moderate, meeting the requirement for lifting to a large height.

[0121] 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 by which 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.

[0122] 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 by which 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 。

[0123] 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 regarding the value of the α angle and the value of the span L1 can be referred to above, and will not be elaborated here.

[0124] 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 19 , 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 such a 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.

[0125] 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 an 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.

[0126] Please refer to Figure 19 , Figure 19 The lower swing limit position and the upper swing limit position of the swing arm 2 are shown in . 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.

[0127] 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 19 , 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.

[0128] 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.

[0129] 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.

[0130] In the embodiment where the swing arm 2 enters the accommodation cavity 201 of the household appliance 1000 in an inclined manner, an 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.

[0131] 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.

[0132] 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.

[0133] 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 unchanged, when the swing arm 2 enters in an inclined state, the swing angle β is smaller than that 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.

[0134] When the value of the β angle reaches the limit value of 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 of the first storage rack 300 during the movement process.

[0135] 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 back. 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.

[0136] 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 applied 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 applied force required to lower and retract the first storage rack 300 is smaller.

[0137] 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 magnitude of 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 relatively small. ，No further detailed description will be made for this element hereinafter.

[0138] 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.

[0139] 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.

[0140] 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 applied by 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.

[0141] 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 applied by 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 requirement for the first storage rack 300 to be lifted to a large height.

[0142] 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 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 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.

[0143] The second hinge mounting portion 22 of the swing arm 2 is used to be directly or indirectly hinged to the first storage rack 300. In some embodiments, a hinge mating portion may be directly provided on the first storage rack 300, and the second hinge mounting portion 22 is mated and installed with the hinge mating portion to achieve hinging; or it may be connected through a connecting member 3, that is, the swing arm 2 is connected to the connecting member 3, and the connecting member 3 is connected to the first storage rack 300.

[0144] In some embodiments, please refer to Figure 3 、 Figure 11 or Figure 12 、 Figure 18 、 Figure 25 or Figure 26 , the lifting mechanism 100 further includes a connecting member 3. The connecting member 3 is used to directly or indirectly connect the first storage rack 300 of the household appliance 1000. The second hinge mounting portion 22 of at least one swing arm 2 is installed on the connecting member 3. By providing the connecting member 3, a hinge mating portion can be provided on the connecting member 3, which can simplify the structural form of the first storage rack 300 and facilitate the setting of the first storage rack 300.

[0145] It should be noted that during the entire movement process of the lifting mechanism 100, the state of the connecting member 3 remains unchanged. In this way, the state of the first storage rack 300 remains unchanged during the entire movement process, so that the storage of the items to be placed has better stability.

[0146] Further, the portion of the connecting member 3 used to connect the first storage rack 300 can always be set in a horizontal state. In this way, the first storage rack 300 is also always in a horizontal state during the movement process. It should be noted that the horizontal state can be absolutely along the horizontal direction or a direction at a certain angle to the horizontal direction, such as within a range of an angle of 10° or less.

[0147] When the connecting member 3 directly connects the first storage rack 300, the first storage rack 300 has only two positions, namely the bottom position to be lifted and the top lifting limit position; when the connecting member 3 indirectly connects the first storage rack 300, the first storage rack 300 can have three positions, namely the bottom storage position, the bottom position to be lifted, and the top lifting limit position.

[0148] In some embodiments, please refer to Figure 3 、 Figure 11 or Figure 12 、 Figure 18 、 Figure 25 or Figure 26, 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 3, and the last section of slide rail 42 is used to connect 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 waiting-to-be-lifted position. By the telescopic movement of the first guide rail 4, the positional relationship between the first storage rack 300 and the connecting member 3 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.

[0149] The first guide rail 4 is provided as multiple sections of slide rails. In the technical solution of the present invention, the number of the slide rails provided is not limited. For example, it can be 2 sections of slide rails. For the 2 sections of slide rails, the first section is the first section of slide rail 41, and the second section is the last section of slide rail 42; it can also be 3 sections of slide rails. For the 3 sections of slide rails, the first section is the first section of slide rail 41, the second section is the intermediate slide rail, and the third section is the last section of slide rail 42; it can also be multiple sections of slide rails with more than 3 sections. For multiple sections of slide rails with more than 3 sections, the first section is the first section of slide rail 41, the last section is the last section of slide rail 42, and those between the first section of slide rail 41 and the last section of slide rail 42 are all intermediate slide rails. The number of the slide rails can be 4 sections, 5 sections, 6 sections, 7 sections, and so on.

[0150] The connecting member 3 is connected to the first section of slide rail 41. The connection can be achieved by bonding or welding, that is, the connecting member 3 can be adhered to the first section of slide rail 41 by using an adhesive; of course, it can also be by welding. For example, both the connecting member 3 and the first section of slide rail 41 are made of metal materials, such as both being made of iron or steel, and the connecting member 3 can be welded to the first section of slide rail 41.

[0151] In some embodiments, the connecting member 3 and the first section of slide rail 41 are integrally formed, that is, the connecting member 3 and the first section of slide rail 41 are one component. In this way, the number of parts is reduced, and the assembly time and cost are saved.

[0152] The last section of slide rail 42 is connected to the first storage rack 300. The first storage rack 300 can usually be formed by some small round ribs arranged alternately in the horizontal or vertical direction. For connecting the slide rail, it can be assisted by a connecting block. Some card slots and other mechanisms are provided on the connecting block to hold the small round ribs on the first storage rack 300. A screwing structure is also provided on the connecting block, and the last section of slide rail 42 is directly connected through the screwing structure. In this way, the connection is more reliable.

[0153] 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 under the action of gravity rather than being caused by human factors, which will reduce the user experience. In some embodiments, please refer to Figure 3 , Figure 11 or Figure 12 , Figure 18 , Figure 25 or Figure 26 , the lifting mechanism 100 further includes a locking structure 5. The locking structure 5 is used to prevent relative rotation between the swing arm 2 and the first storage rack 300 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 are relatively non-rotating. During the user's operation, 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 picking up and placing the items to be placed, and the user experience is better.

[0154] It should be noted that the specific structural form of the locking structure 5 is not limited. For example, it can be realized by the insertion and cooperation of a pin and a hole in the front-rear direction. When the pin and the hole are engaged, locking is achieved, and when the pin and the hole are separated, unlocking is achieved; in some other embodiments, it can also be realized by using an auxiliary lever structure. For example, a clamping groove extending in the left-right direction is provided, and the movement of the clamping shaft is realized through the lever structure. When the user operates the lever structure, the movement of the clamping shaft is driven to achieve the cooperation between the clamping shaft and the clamping groove. The clamping groove is set as a special-shaped groove, which can limit the movement in the front-rear direction. In this way, in a vertical plane, there are two hinged cooperation structures and they are not coaxial, so locking can be achieved and the user operation is also convenient.

[0155] In some of the above embodiments, the cross-section of the pin or the clamping shaft can be set as non-circular, such as all square, rectangular and other shapes; of course, it can also be a combination of a circular edge line and a straight edge line. As long as there is a straight edge line on the cross-section and anti-rotation can be achieved. The cross-sections of the corresponding hole and the clamping groove can also be cooperatively set to achieve anti-rotation.

[0156] It should be noted that for the above-mentioned locking of the locking structure 5, it may not be necessary for the first storage rack 300 to move 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, it is also the top locking position of the first storage rack 300, and the two positions are the same position.

[0157] In the embodiment where the first storage rack 300 is movably locked relative to the swing arm 2, the first storage rack 300 may be movably locked in the front-rear direction, such as being locked by pulling forward or pushing backward; during the swinging movement of the swing arm 2, the first storage rack 300 moves upward and forward. Therefore, locking by pulling forward is more in line with the user's usage habits.

[0158] In some embodiments, the lifting mechanism 100 further includes a connecting member 3, and the locking structure 5 includes a locking member 5a that is movably mounted relative to the connecting member 3 in the front-rear direction, and the locking member 5a is used to be mounted on the first storage rack 300.

[0159] It should be noted that in the way of locking by pulling forward, the first storage rack 300 is movably locked forward 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, and they are two different positions.

[0160] A sliding fit structure 51 is provided between the locking member 5a and the swing arm 2. During the process of the locking member 5a moving forward relative to the connecting member 3, the sliding fit structure 51 is in sliding fit 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 51, the forward pulling lock of the first storage rack 300 can be realized, and there is no need to additionally provide a complex locking and unlocking mechanism, which is more convenient for the user to operate.

[0161] In the technical solution of the present invention, the specific structural form of the sliding fit structure 51 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.

[0162] In some embodiments, please refer to Figure 21 、 Figure 22 、 Figure 28 and Figure 29, the sliding fit structure 51 includes a mating chute and a sliding shaft that slide fit with each other. At least one of the mating chutes includes an arc-shaped groove section 5112, and the extension path of the arc-shaped groove section 5112 at least partially adapts to the rotation of the sliding shaft. The locking member 5a moves forward relative to the connecting member 3, and the corresponding sliding shaft can slide into the tail of the arc-shaped groove section 5112, so that the swing arm 2 stops swinging. That is, the locking of the sliding shaft can be realized by setting the simple arc-shaped groove section 5112, without additionally setting a relatively complex groove structure, and without additionally setting other mechanisms. The structure is simple. In addition, it also conforms to the user's operating habits and improves the user experience.

[0163] It should be noted that the arc-shaped groove section 5112 has an upper groove wall and a lower groove wall in the up-down direction, and the sliding shaft abuts against the upper groove wall or the lower groove wall to realize the limit in the up-down direction.

[0164] The arc radius of each part of the arc-shaped groove section 5112 can be the same, or the arc radius of each part of the arc-shaped groove section 5112 is inconsistent and is formed by splicing a plurality of arc groove sections with different radii. The above are all within the protection scope of the present utility model. For the mating chute, only the arc-shaped groove section 5112 can be set, and no other groove sections need to be additionally set.

[0165] In addition, in order to further limit the sliding shaft, in some embodiments, a rib 5113 is provided on the inner side wall at the tail of the arc-shaped groove section 5112 to limit the sliding shaft within the arc-shaped groove section 5112. On the one hand, the rib 5113 has the function of limiting the rotation of the sliding shaft, reducing the sliding of the sliding shaft in the arc-shaped groove section 5112 in the front-rear direction, so that the swing arm 2 and the first storage rack 300 can relatively stop rotating; on the other hand, the rib 5113 has a tactile feeling when rotated in place. During the operation by the user, when the sliding shaft slides to the position of the rib 5113, the width of the arc-shaped groove section 5112 narrows at the rib 5113, and the user needs to pass through with a little more force. After passing through, it reaches the appropriate position, prompting the user that the operation is in place and improving the user experience.

[0166] In some embodiments, please refer to Figure 13 、 Figure 20 and Figure 27 , the mating chute includes an arc-shaped groove section 5112 and a horizontal groove section 5111. The extension path of the arc-shaped groove section 5112 adapts to the rotation of the sliding shaft. The horizontal groove section 5111 is connected to the tail of the arc-shaped groove section 5112 and extends from front to back. The locking member 5a moves forward relative to the connecting member 3, and the corresponding sliding shaft can slide into the horizontal groove section 5111, so that the swing arm 2 stops swinging.

[0167] 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 limit in the up-down direction. At this time, the swing arm 2 stops swinging, that is, the first storage rack 300 is locked relative to the swing arm 2. The sliding lock is achieved through the cooperation mode of the sliding shaft and the cooperation chute, without the need to additionally set other mechanisms, and the structure is simple. In addition, the setting of the horizontal groove section 5111 makes the first storage rack 300 move more smoothly relative to the connecting member 3, the user's operation is more stable, and it also conforms to the user's operation habit, improving the user experience.

[0168] The present utility model does not limit the specific setting positions of the sliding shaft and the cooperation chute. For example, the sliding shaft can be provided on the swing arm 2, and the cooperation chute can be provided on the locking member 5a; alternatively, the sliding shaft can be provided on the locking member 5a, and the cooperation chute can be provided on the swing arm 2.

[0169] It should be noted that the present utility model does not limit the specific sliding cooperation mode of the sliding shaft and the cooperation chute. For example, the diameter of the sliding shaft is set to be smaller, the chute width of the cooperation chute is set to be larger, and there is a clearance fit between the sliding shaft and the cooperation chute. The depth at which the sliding shaft can be inserted into the cooperation chute can be deeper. For example, the end face of the sliding shaft directly abuts against the bottom wall 2011 surface of the cooperation chute, or there can be a certain preset distance value between the end face of the sliding shaft and the bottom wall 2011 surface of the cooperation chute.

[0170] Since the sliding shaft rotates relative to the cooperation chute for a long time, the sliding shaft and the locking member 5a can be made of different materials. For example, the sliding shaft is made of copper material, and the locking member 5a is made of iron material; alternatively, the sliding shaft is made of iron material, and the locking member 5a is made of copper material. In some embodiments, the sliding shaft is made of a material with a relatively high hardness such as iron material or steel material, and the locking member 5a is made of plastic material.

[0171] In addition, for the locking member 5a, its shape is not limited. For example, it can be plate-shaped, block-shaped, or cylindrical or other shapes.

[0172] In some embodiments, a bearing can also be provided between the sliding shaft and the cooperation chute. Through the rotation of the bearing, the relative movement between the sliding shaft and the cooperation chute is converted into the relative rotation between the outer ring of the bearing and the cooperation chute, reducing the wear and tear of the sliding shaft.

[0173] Of course, in some other embodiments, a roller can also be sleeved on the sliding shaft, and the roller can be made of plastic material, rubber material, etc.

[0174] The mating chute can be provided on the locking member 5a or on the swing arm 2. In some embodiments, the mating chute is provided on the locking member 5a. Two sets of the sliding fit structures 51 are provided, and the sliding shafts of the two sets of the sliding fit structures 51 are both provided on the same swing arm 2. The mating chutes of the two sets of the sliding fit structures 51 are both provided on the locking member 5a. By providing two sets of the sliding fit structures 51, the locking stability of the first storage rack 300 is improved.

[0175] Since the positions of the sliding shafts of the two sets of the sliding fit structures 51 relative to the second hinge mounting portion 22 are different, their corresponding rotation radii are different, and the corresponding rotation arc trajectories are different. For the same locking member 5a, different trajectory lines are formed on the locking member 5a.

[0176] Specifically, please refer to Figure 13 、 Figure 19 and Figure 27 , 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.

[0177] The two mating chutes include a first mating chute 511 corresponding to the first sliding shaft 513 and a second mating chute 512 corresponding to the second sliding shaft 514. The inlet of the first mating chute 511 is opened at the lower end of the locking member 5a, and the inlet of the second mating chute 512 is opened at the front end of the locking member 5a. Through the introductions at different positions, the stability of the first storage rack 300 during the lifting process is better.

[0178] The inlet of the first mating chute 511 is opened at the lower end of the locking member 5a, and the inlet of the second mating chute 512 is opened at the front end of the locking member 5a. When the first sliding shaft 513 and the second sliding shaft 514 are respectively and correspondingly fitted and 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.

[0179] The first storage rack 300 is connected to the locking member 5a. To enable the first storage rack 300 to move linearly in the front-rear direction relative to the connecting member 3, as described in the foregoing part, a first guide rail 4 is provided between the connecting member 3 and the locking member 5a. By 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 move linearly in the front-rear direction relative to the connecting member 3.

[0180] 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 lock the two swing arms 2 respectively 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.

[0181] In some embodiments, 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.

[0182] 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, two swing arms 2 and the connecting member 3. 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 some embodiments, when the two swing arms 2 are both at the lower swing limit position, the two swing arms 2 include a first swing arm on the left side and a second swing arm on the right side. The installation position of the first swing arm on the fixed arm 1 is lower, and the installation position of the second swing arm on the fixed arm 1 is higher.

[0183] For the two sliding shafts, they are both arranged on the second swing arm. In this way, when the second swing arm corresponds to the upper swing limit position, the upper end of the second swing arm is higher than the upper end of the first swing arm. At this time, it is convenient for the second swing arm to cooperate with the locking member 5a provided on the storage rack for locking.

[0184] In addition, it should be noted that inside the household appliance 1000, two lifting mechanisms 100 are provided and are arranged at intervals 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 two lifting mechanisms 100, the first storage rack 300 can be stably lifted.

[0185] Of course, in the embodiment where two lifting mechanisms 100 are provided, two or four swing arms 2 can be correspondingly provided to jointly support the first storage rack 300.

[0186] In the lifting mechanism 100, between 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.

[0187] Some specific structures of the household appliance 1000 will be described in detail below in conjunction with some features of the lifting mechanism 100 proposed in the present utility model.

[0188] 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. The door body is opened to a suitable position to open the opening. At this time, the user can pull out the first storage rack 300 and, with the cooperation of the lifting mechanism 100, lift the first storage rack 300 and extend it out of the receiving cavity 201 for the user to take out or put in the items to be placed.

[0189] The receiving cavity 201 has a rear wall opposite to the opening and two side walls 2012 on both sides of the rear wall. The fixed arm 1 is fixed on the side walls 2012. 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 2012 as the hinge point to realize the lifting of the first storage rack 300.

[0190] Correspondingly, inside 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 in which the first storage rack 300 can move forward and backward relative to the connecting member 3, 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 in which the first storage rack 300 can be locked in the forward direction relative to the connecting member 3, 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.

[0191] Specifically, in the embodiment where the lifting mechanism 100 further includes the first guide rail 4, the first section of the slide rail 41 is connected to the connecting member 3, and the last section of the slide rail 42 is used to connect the first storage rack 300 of the household appliance 1000. Therefore, during the relative movement between the first section of the slide rail 41 and the last section of the slide rail 42, the relative position between the first storage rack 300 and the connecting member 3 changes, so that the first storage rack 300 can be pulled out from the bottom storage position to the bottom waiting-to-be-lifted position. In this way, the first storage rack 300 can be placed at a more rearward position in the accommodation cavity 201, increasing the moving space of the first storage rack 300.

[0192] In some embodiments, the lifting mechanism 100 further includes a locking structure 5. The locking structure 5 includes a locking member 5a that can be movably installed relative to the first section of the slide rail 41 in the front-rear direction. The locking member 5a is provided on the first storage rack 300. A sliding fit structure 51 is provided between the locking member 5a and the swing arm 2. The sliding fit structure 51 includes a mating chute and a sliding shaft that slidably cooperate with each other. The mating chute includes an arc-shaped groove section 5112. The extension path of the arc-shaped groove section 5112 at least partially adapts to the rotation of the sliding shaft. When the locking member 5a moves forward relative to the connecting member 3, the corresponding sliding shaft can slide into the tail of the arc-shaped groove section 5112 to stop the swing of the swing arm 2, so that the first storage rack 300 can move from the top lifting limit position to the top locking position correspondingly. In this way, the locking method is simpler, and the operation can be realized without adding additional mechanisms. The structure is simple and the operation is convenient, improving the user experience.

[0193] In some other embodiments, the mating chute includes an arc-shaped groove section 5112 and a horizontal groove section 5111. The extension path of the arc-shaped groove section 5112 adapts to the rotation of the sliding shaft. The horizontal groove section 5111 is connected to the tail of the arc-shaped groove section 5112 and extends from front to back. When the locking member 5a moves forward relative to the connecting member 3, the corresponding sliding shaft can slide into the horizontal groove section 5111 to stop the swing of the swing arm 2. The setting of the horizontal groove section 5111 makes the first storage rack 300 move more smoothly relative to the connecting member 3, the user's operation is more stable, and it also conforms to the user's operation habit, improving the user experience.

[0194] 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 invention, please refer to Figure 16 and Figure 17, 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 the user bending down and improving the user experience.

[0195] 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 at 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 oppositely.

[0196] In view of the above-mentioned embodiments, the user needs 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.

[0197] Of course, for the upper ends of the first storage rack 300 and the second storage rack 400, in some embodiments, 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 first storage rack 300 and the second storage rack 400 have the same depth, the first storage rack 300 can be in a higher position.

[0198] Corresponding to the household appliance 1000 being 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.

[0199] Regarding the installation position parameters of the fixed hinge point of the swing arm 2 in the accommodation cavity 201 of the household appliance 1000, the higher the relative height of the installation position, the greater the lifting height of the first storage rack 300. In some embodiments, please refer to Figure 10, a first storage rack 300 and a second storage rack 400 are provided inside the household appliance 1000, and the second storage rack 400 is arranged at the upper part of the accommodation cavity 201 through a second guide rail 500.

[0200] Wherein, in the up and down direction, the rotation center of the first hinge mounting part 21 is between a set position below the second guide rail 500 and below the bottom of the second storage rack 400, the drop between the set position and the bottom of the second storage rack 400 is L2, and 0 ≤ L2 ≤ 10 mm.

[0201] By setting the first hinge mounting part 21 at a relatively upper position, the first storage rack 300 can be at a greater height at the top lifting limit position. Of course, combined with the large swing angle of the swing arm 2, the lifting height of the first storage rack 300 is further increased.

[0202] Considering that the installation of the first hinge part does not interfere with the activities of the second storage rack and the second guide rail 500, the upper installation position of the first hinge mounting part 21 cannot exceed the second guide rail 500 at most, and the lowest position cannot be too low, otherwise the purpose of lifting the first storage rack 300 to a large height cannot be achieved. Therefore, in the embodiment of the present invention, setting the set position between 0 mm and 10 mm below the bottom of the second storage rack 400 is a relatively reasonable value.

[0203] It should be noted that the drop value L2 can be an integer value from 0 mm to 10 mm, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 m, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc. Of course, it can also be a value between any two of the above integers. For example, the value between 1 mm and 2 mm can be 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, etc., and some parameters by analogy.

[0204] It can be understood that the larger the value of the drop L2, the lower the position of the first hinge mounting part 21 is set, the smaller the relative height of the first storage rack 300 at the top lifting limit position is, and when the first storage rack 300 is lifted to the top limit position, the probability of interference with the second storage rack 400 is also smaller, the fixed arm 1 is farther away from the second guide rail 500, and the position where the fixed arm 1 is arranged is more flexible.

[0205] When the drop value L2 is 10 mm, that is, the rotation center of the first hinge mounting portion 21 is 10 mm below the bottom of the second storage rack 400, the height of the first storage rack 300 lifted decreases less. At the top limit position, the farther the first storage rack 300 is from the second storage rack 400, the risk of interference between the first storage rack 300 and the second storage rack 400 is reduced, the distance between the fixed arm 1 and the second guide rail 500 is farther, and the position where the fixed arm 1 is arranged is more flexible.

[0206] When the drop value L2 is 0 mm, that is, the rotation center of the first hinge mounting portion 21 is below the bottom of the second storage rack 400. At this time, a part of the upper end of the swing arm 2 coincides with the projection of the second storage rack 400 in the left-right direction. With such a setting, the layout space of the inner cavity of the housing 200 of the household appliance 1000 is saved, and the structure is more compact.

[0207] It should be noted that Figure 10 shows the positional relationship between the swing arm 2 and the second storage rack 400. In Figure 10 a first plane reference line c, a second plane reference line e, and a third plane reference line d are shown; the third plane reference line d is the plane reference schematic line of the lower end surface of the second guide rail 500; the second plane reference line e is the plane reference schematic line of the lower end surface of the second storage rack 400; the first plane reference line c is the plane schematic line corresponding to the reference plane that is parallel to the lower end surface of the second storage rack 400 and is offset downward by a distance L2. As can be seen in Figure 10 the position corresponding to the first plane reference line c is the reference line parallel to the bottom of the second storage rack 400 described in the present invention. Therefore, it is defined that the first hinge mounting 21 is in the region between the first plane reference line c and the second plane reference line d in the up-down direction.

[0208] The closer the first hinge mounting portion 21 is to the opening of the accommodation cavity 201, the longer the length of the swing arm 2 extending out of the accommodation cavity 201, and thus the greater the height that can be lifted. In some embodiments, please refer to Figure 7 and Figure 8 The front end face of the housing 200 is provided with a front opening communicating with the accommodation cavity 201. The horizontal distance between the rotation center of the first hinge mounting portion 21 and the front end face of the housing 200 is L3, and 30 mm ≤ L3 ≤ 120 mm.

[0209] Considering that a door body is provided at the opening, which can satisfy the closing of the door body. Therefore, a minimum horizontal distance of 30 mm between the rotation center of the first hinge mounting portion 21 and the front end face of the housing 200 is a relatively reasonable value. Considering that the first storage rack 300 is lifted to be parallel to the second storage rack 400 in the front-rear direction without interference, a minimum horizontal distance of 120 mm between the rotation center of the first hinge mounting portion 21 and the front end face of the housing 200 is a relatively reasonable value.

[0210] It should be noted that the horizontal distance L3 can be an integer value between 30 mm and 120 mm, such as 40 mm, 50 mm, 60 mm, 70 mm, 80 m, 90 mm, 100 mm, 110 mm, etc. Of course, it can also be a value between any two of the above integers. For example, the values between 30 mm and 40 mm can be 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, etc. And so on for some parameters.

[0211] It can be understood that the larger the value of L3, the more rearward the position of the first hinge mounting portion 21 is set, that is, the farther away from the opening of the accommodation cavity 201. When the swing arm 2 is in the upper swing limit position, the distance between the first storage rack 300 and the second storage rack 400 is smaller, and the height to which the first storage rack 300 can be lifted is smaller, which is not conducive to the setting and operation of other structures of the household appliance 1000. For example, it is not conducive to the setting of the door body, nor is it conducive to the opening and closing of the door body.

[0212] The smaller the value of L3, the more forward the position of the first hinge mounting portion 21 is set, that is, the closer to the opening of the accommodation cavity 201. When the swing arm 2 is in the upper swing limit position, the distance between the first storage rack 300 and the second storage rack 400 is larger, and the height to which the first storage rack 300 can be lifted is larger, which is conducive to the setting and operation of other structures of the household appliance 1000. For example, it is conducive to the setting of the door body, and it is also conducive to the opening and closing of the door body.

[0213] When the value of L3 is at the limit value of 120 mm, the position of the first hinge mounting portion 21 is at the rear limit position. At this position, the distance between the first storage rack 300 and the second storage rack 400 is the smallest, and the first storage rack 300 can be lifted to a suitable height, and it is easy to arrange some other structures in the household appliance 1000, and it is conducive to the opening and closing of the main body.

[0214] When the value of L3 is at the limit value of 30 mm, the position where the first hinge mounting portion 21 is provided is at the forward limit position. At this position, on the premise that the swing angle of the swing arm 2 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the distance between the first storage rack 300 and the second storage rack 400 is obvious, and the first storage rack 300 can be lifted to a relatively high position; on the premise that the distance between the first storage rack 300 and the second storage rack 400 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the height of the first storage rack 300 is obvious, and the first storage rack 300 is lifted to a relatively large height, which is suitable for the application scenario of large-height lifting.

[0215] In some embodiments, the value of L3 can be between 60 mm and 90 mm. When the value of L3 is 60 mm, on the premise that the swing angle of the swing arm 2 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the distance between the first storage rack 300 and the second storage rack 400 is obvious, reducing the risk of interference between structures during the movement, and the first storage rack 300 can be lifted to a relatively high position; on the premise that the distance between the first storage rack 300 and the second storage rack 400 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the height of the first storage rack 300 is moderate, and the first storage rack 300 is lifted to a relatively large height, which is suitable for the application scenario of large-height lifting.

[0216] When the value of L3 is 90 mm, on the premise that the swing angle of the swing arm 2 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the distance between the first storage rack 300 and the second storage rack 400 is obvious and moderate, reducing the risk of interference between structures during the movement, and the first storage rack 300 can be lifted to a relatively high position; on the premise that the distance between the first storage rack 300 and the second storage rack 400 remains unchanged, compared with when the value of L3 is 120 mm, the increase amplitude of the height of the first storage rack 300 is obvious, and the first storage rack 300 is lifted to a relatively large height, which is suitable for the application scenario of large-height lifting.

[0217] In some preferred embodiments, when the value of L3 is around 75 mm, factors such as the lifting height of the first storage rack 300, the interference risk level between the first storage rack 300 and the second storage rack 400 at the top lifting limit position, and the opening and closing of the door body are taken into consideration. With such a setting, the first storage rack 300 can obtain a relatively large lifting height, the interference risk level between the first storage rack 300 and the second storage rack 400 is relatively low, and the opening and closing of the door body are also easy, thus improving the user experience.

[0218] The longer the length of the swing arm 2, the greater the span in the vertical direction between the first hinge mounting portion 21 and the second hinge of the swing arm 2 at the upper swing limit position. At this time, the lifting height of the first storage rack 300 is also greater. However, the longer the length of the swing arm 2, at the lower swing limit position of the swing arm 2, the first storage rack 300 is more likely to interfere with the bottom of the accommodation cavity 201.

[0219] In some embodiments, please refer to Figure 7 and Figure 9 , the swing arm 2 has a lower swing limit position. Corresponding to the lower swing limit position, the distance between the second hinge mounting portion 22 and the bottom wall 2011 of the accommodation cavity 201 is L4, and 10 mm ≤ L4 ≤ 60 mm.

[0220] The minimum value of the distance between the second hinge mounting portion 22 and the bottom wall 2011 of the accommodation cavity 201 is 10 mm, making full use of the space of the accommodation cavity 201. At the same space height, the length of the swing arm 2 can be set longer. After the second hinge mounting portion 22 of the swing arm 2 swings out of the accommodation cavity 201, the first storage rack 300 can be at a relatively high position, reducing the frequency of the user bending down and improving the user experience.

[0221] The maximum value of the distance between the second hinge mounting portion 22 and the bottom wall 2011 of the accommodation cavity 201 is 60 mm, which is convenient for leaving a certain gap at the bottom of the accommodation cavity 201 to facilitate the installation of other structures.

[0222] It should be noted that L4 can be an integer value from 10 mm to 60 mm, such as 20 mm, 30 mm, 40 mm, 50 mm, etc. Of course, it can also be a value between any two of the above integers. For example, the values between 30 mm and 40 mm can be 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, etc. And so on for some parameters.

[0223] It can be understood that the larger the value of L4, the higher the position of the second hinge mounting portion 22 at the lower swing limit position. In the same height space, the shorter the swing arm 2 needs to be set, and the smaller the risk of interference between the swing arm 2 and the bottom of the receiving cavity 201. Conversely, the smaller the value of L4, the lower the position of the second hinge mounting portion 22 at the lower swing limit position. In the same height space, the longer the swing arm 2 needs to be set, and the greater the risk of interference between the swing arm 2 and the bottom of the receiving cavity 201.

[0224] When the value of L4 takes the limit value of 10 mm, at the lower swing limit position, the distance between the position of the second hinge mounting portion 22 and the bottom of the receiving cavity 201 is the smallest. The longer the length of the swing arm 2 can be set, the greater the height that the first storage rack 300 can be lifted. The first storage rack 300 can be in a higher position, reducing the frequency of the user bending down and improving the user experience.

[0225] When the value of L4 takes the limit value of 60 mm, at the lower swing limit position, the distance between the position of the second hinge mounting portion 22 and the bottom of the receiving cavity 201 is larger. Compared with when the value of L4 takes the limit value of 10 mm, the height of the second hinge mounting portion 22 is increased by about 50 mm. At this time, the distance between the second hinge mounting portion 22 and the bottom of the receiving cavity 201 is larger, and the risk of interference between the swing arm 2 and the bottom of the receiving cavity 201 is very small.

[0226] In some preferred embodiments, when the value of L4 is around 35 mm, considering factors such as the lifting height of the first storage rack 300, the risk of interference between the swing arm 2 and the bottom of the receiving cavity 201, etc., can enable the first storage rack 300 to obtain a larger lifting height, and the degree of interference risk between the swing arm 2 and the bottom of the receiving cavity 201 is relatively low, improving the user experience.

[0227] It should be noted that the installation position parameter L2 of the upper first hinge mounting portion 21 in the up and down direction in the receiving cavity 201, the horizontal distance parameter L3 between the first hinge mounting portion 21 and the front end face of the housing (200), and at the lower swing limit position, the distance parameter L4 between the lowermost second hinge mounting portion 22 and the bottom of the receiving cavity 201 are interrelated and determine the set length of the swing arm 2, the angle that can swing, and the maximum height that the first storage rack 300 can be lifted, the interference situation between the first storage rack 300 and the second storage rack 400, the opening and closing of the door body of the household appliance 1000, etc.

[0228] In some embodiments, when the value of the L2 parameter is 10 mm, the value of the L3 parameter is 75 mm, and the value of the L4 parameter is 35 mm, the swing arm 2 can be set to an appropriate length. With such a setting, the layout space of the inner cavity of the housing 200 of the household appliance 1000 is saved, the structure is more compact, the first storage rack 300 can obtain a larger lifting height, the swing arm 2 can occupy a reasonable space in the receiving cavity 201, the risk degree of interference between the swing arm 2 and the bottom of the receiving cavity 201 is relatively low, the risk degree of interference between the first storage rack 300 and the second storage rack 400 is relatively low, and the opening and closing of the door body are also easy, improving the user experience.

[0229] In an embodiment where two swing arms 2 are provided in the lifting mechanism 100, the first hinge mounting portions 21 of the two swing arms 2 are both hinge-mounted on the fixed arm 1, and the second hinge mounting portions 22 of the two swing arms 2 are both directly or indirectly mounted on the first storage rack 300.

[0230] Also refer to Figure 7 and Figure 9 , among the two first hinge mounting portions 21 of the two swing arms 2, the first hinge mounting portion 21 that is above and in the front is the first upper hinge mounting portion, and the rotation center of the first upper hinge mounting portion is between the lower end of the second guide rail 500 and a set position below the bottom of the second storage rack 400. That is, in the embodiment where two swing arms 2 are provided, with the first upper hinge mounting portion provided above as a reference, it is set as high as possible.

[0231] Each swing arm 2 has a lower limit position. Corresponding to the lower limit position, among the two second hinge mounting portions 22 of the two swing arms 2, the second hinge mounting portion 22 that is below and in the rear is the second lower hinge mounting portion, and the distance between the rotation center of the second lower hinge mounting portion and the bottom wall 2011 of the receiving cavity 201 is L5, and 10 mm ≤ L5 ≤ 60 mm. That is, in the embodiment where two swing arms 2 are provided, with the second lower hinge mounting portion provided below as a reference, it is set as low as possible.

[0232] For the setting method and value of the parameter L5, reference can be made to the above-mentioned setting method of the parameter L4, which will not be elaborated here.

[0233] The following will describe 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:

[0234] 1. The first storage rack 300 is in the bottom storage position, as Figures 1 - 4 shown:

[0235] This state is when the user has not used it, or has just started using it, or has finished using it. In these states, the first storage rack 300 is located within the accommodation cavity 201 of the household appliance 1000. As can be seen from Figures 1 to 4 , the first storage rack 300 is received within the accommodation cavity 201. At this time, the distance between the first slide rail 41 and the last 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.

[0236] 2. The first storage rack 300 is at the bottom position to be lifted, as shown in Figures 5 - 13 :

[0237] 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 5 - 6 , at this time, the distance between the first slide rail 41 and the last 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.

[0238] 3. The first storage rack 300 is at the top lifting limit position, as shown in Figures 14 - 22 :

[0239] 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 lifting height. As can be seen from Figures 14 - 15 , at this time, the distance between the first slide rail 41 and the last 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 was at the bottom position to be lifted. The swing arm 2 is at the upper limit position.

[0240] 4. The first storage rack 300 is at the top locked position, as shown in Figures 23 - 29 :

[0241] This state is a locked state after the user lifts the first storage rack 300. At this time, the user can place and take the items to be placed. In these states, the first storage rack 300 is at the maximum lifting height. As can be seen from Figures 23 - 24It 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 has moved forward a certain distance relative to its position at the top lifting limit position at the top locking position, and the swing arm 2 still remains at the upper swing limit position.

[0242] The following will be introduced with a complete usage process of the user:

[0243] 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 locking 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.

[0244] 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 unlocking 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.

[0245] The above are only optional embodiments of the present invention, and thus 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 household appliance, characterized in that, Comprising: A housing, formed with a receiving cavity; A first storage rack and a second storage rack, the second storage rack being disposed at the upper part of the receiving cavity through a second guide rail; And, A lifting mechanism, including a fixed arm and at least one swing arm, the fixed arm being used for installation in the receiving cavity of the household appliance, a first hinge mounting portion and a second hinge mounting portion being formed on the same swing arm, the first hinge mounting portion being mounted on the fixed arm, and the second hinge mounting portion being used for directly or indirectly mounting on the first storage rack; Wherein, in the up and down direction, the rotation center of the first hinge mounting portion is between a set position below the second guide rail and below the bottom of the second storage rack, the drop between the set position and the bottom of the second storage rack is L2, and 0 ≤ L2 ≤ 10 mm.

2. The household appliance according to claim 1, characterized in that, The front end face of the housing is provided with a front opening communicating with the receiving cavity, the horizontal distance between the rotation center of the first hinge mounting portion and the front end face of the housing is L3, and 30 mm ≤ L3 ≤ 120 mm.

3. The household appliance according to claim 1, characterized in that, The swing arm has a lower swing limit position, corresponding to the lower swing limit position, the distance between the second hinge mounting portion and the bottom wall of the receiving cavity is L4, and 10 mm ≤ L4 ≤ 60 mm.

4. The household appliance according to claim 1, characterized in that, Two swing arms are provided, the first hinge mounting portions of the two swing arms are both mounted on the fixed arm, and the second hinge mounting portions of the two swing arms are both directly or indirectly mounted on the first storage rack, wherein: Among the two first hinge mounting portions of the two swing arms, the first hinge mounting portion that is above and in the front side is the first upper hinge mounting portion, and the rotation center of the first upper hinge mounting portion is between the lower end of the second guide rail and a set position below the bottom of the second storage rack; and / or, Each swing arm has a lower swing limit position, corresponding to the lower swing limit position, among the two second hinge mounting portions of the two swing arms, the second hinge mounting portion that is below and in the rear side is the second lower hinge mounting portion, and the distance between the rotation center of the second lower hinge mounting portion and the bottom wall of the receiving cavity is L5, and 10 mm ≤ L5 ≤ 60 mm.

5. The household appliance according to claim 1, characterized in that, The lifting mechanism is used for lifting the first storage rack of the household appliance, so that the first storage rack can be switched between a bottom waiting-to-be-lifted position and a top lifting limit position; The swing arm has an upper swing limit position, which is used for enabling the first storage rack to be in the top lifting limit position. At the upper swing limit position, the swing arm is used for upwardly supporting the first storage rack, and in the direction from the rear to the front, the swing arm is inclined upward.

6. The household appliance according to claim 5, characterized in that, Corresponding to 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°.

7. The household appliance according to claim 5, characterized in that, Corresponding to the upper swing limit position, the span in the up and down direction between the rotation centers of the first hinge mounting portion and the second hinge mounting portion on the same swing arm is L, and 0 < L ≤ 235 mm.

8. The household appliance according to claim 5, characterized in that, The swing arm further has a lower swing limit position for enabling the first storage rack to be in the bottom position to be lifted. The 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.

9. The household appliance according to claim 8, characterized in that, The swing angle is β, and 90° < β ≤ 160°.

10. The household appliance according to claim 1, characterized in that, The lifting mechanism further includes a connecting member and a first guide rail. The second hinge mounting portion of the swing arm is connected to the connecting member. The first guide rail 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 and a last section of slide rail. The first section of slide rail is connected to the connecting member, and the last section of slide rail is used to connect the first storage rack of the household appliance so that the first storage rack can be switched between the bottom storage position and the bottom position to be lifted.

11. The household appliance according to claim 1, characterized in that, The lifting mechanism further includes a locking structure for making the swing arm and the first storage rack rotate relatively stopped after the first storage rack is lifted.

12. The household appliance according to claim 11, characterized in that, The lifting mechanism further includes a connecting member. The second hinge mounting portion of at least one swing arm is mounted on the connecting member. The locking structure includes a locking member that can be movably mounted relative to the connecting member in the front-back direction, and the locking member is used to be mounted on the first storage rack. A sliding fit structure is provided between the locking member and the swing arm. During the process of the locking member moving relative to the connecting member in the front-back direction, the sliding fit structure is in sliding fit to enable the first storage rack to correspondingly move from the top lifting limit position to the top locking position.

13. The household appliance according to claim 12, characterized in that, The sliding fit structure includes a mating chute and a sliding shaft that are slidably mated with each other. At least one of the mating chutes includes an arc-shaped groove section, and the extending path of the arc-shaped groove section at least partially adapts to the rotation of the sliding shaft. When the locking member moves forward relative to the connecting member, the corresponding sliding shaft can slide into the tail of the arc-shaped groove section to stop the swing of the swing arm.

14. The household appliance according to claim 13, characterized in that, A retaining rib is provided on the inner side wall at the tail of the arc-shaped groove section to limit the sliding shaft within the arc-shaped groove section.

15. The household appliance according to claim 12, characterized in that, The sliding fit structure includes a mating chute and a sliding shaft that are slidably mated with each other. At least one of the mating chutes includes an arc-shaped groove section and a horizontal groove section. The extending path of the arc-shaped groove section adapts to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arc-shaped groove section and extends from front to back. When the locking member moves forward relative to the connecting member, the corresponding sliding shaft can slide into the horizontal groove section to stop the swing of the swing arm.

16. The household appliance according to claim 1, characterized in that, Two swing arms are provided. The lifting mechanism further includes a connecting member. The second hinge mounting portions of the two swing arms are both hinged to the connecting member, and the connecting member is used to be connected to the first storage rack.

17. The household appliance according to claim 1, characterized in that, The first storage rack has a top lifting limit position. 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.

18. The household appliance according to claim 17, wherein, The household appliance includes a dishwasher. The first storage rack is set as a lower dish basket, and the second storage rack is set as an upper dish basket.

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