Lifting mechanism and household appliance

Abstract

The utility model discloses a lifting mechanism and a household appliance, the lifting mechanism comprises a fixed arm and at least one swing arm, the fixed arm is used for being installed in a containing cavity of the household appliance, a first hinge installation part and a second hinge installation part are formed on the same swing arm, and the first hinge installation part and the second hinge installation part are hinged to each other. 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; the swing arm is provided with an upper swing limit position used for enabling the first storage rack to be located at the top lifting limit position, the swing arm is used for supporting the first storage rack upwards at the upper swing limit position, and the swing arm is obliquely arranged upwards in the direction from back to front. Compared with the mode that the swing arm swings to the horizontal direction, the swing arm can swing by a larger angle, so that the first storage rack can be lifted by a larger height, frequent stooping of a user in operation is reduced, and user experience is improved.

Description

[0001] This application claims priority to Chinese patent applications filed with the China Patent Office on April 30, 2024, with application numbers 202410541707.7 and 202420943936.7, both named "Lifting Mechanism and Dishwasher", the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] In household appliances with internal spaces, movable storage structures such as shelves that can be extended from the interior of the household appliances are usually provided. In the prior art, there are some movable storage structures that have both a pull-out function and a lifting function.

[0004] In some household appliances, storage racks are usually placed at the bottom of the household appliances. During use, operations such as taking and putting tableware require frequent bending. In order to reduce the frequency of bending during use of the storage rack, the existing technology uses a lifting mechanism to lift the storage rack before use, which can reduce the bending frequency. However, the existing lifting mechanism makes the storage rack lift to a low height, and users still need to bend frequently during use, resulting in a poor user experience. Utility Model Content

[0005] The main purpose of the present utility model is to propose a lifting mechanism and a household appliance, aiming to optimize the existing lifting mechanism to reduce the frequency of users bending over during operation and improve the user experience. In realizing the solution of lifting the shelf of the household appliance to a large height, how to set up an optimized lifting mechanism is an urgent problem to be solved.

[0006] To achieve the above-mentioned object, the present invention provides a lifting mechanism, comprising a fixed arm and at least one swing arm, wherein the fixed arm is mounted in the receiving cavity of the household appliance, and a first hinged mounting portion and a second hinged mounting portion are formed on the same swing arm, wherein the first hinged mounting portion is mounted on the fixed arm, and the second hinged mounting portion is directly or indirectly mounted on the first storage rack;

[0007] The swing arm has an upper swing limit position, which is used to enable 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 back to front, the swing arm is tilted upward.

[0008] In one embodiment, corresponding to the upper swing limit position, the angle between the line connecting the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm and the horizontal direction is α, and 0°<α≤70°.

[0009] In one embodiment, corresponding to the upper swing limit position, the span of the rotation centers of the first articulated mounting portion and the second articulated mounting portion on the same swing arm in the vertical direction is L1, and 0<L1≤235mm.

[0010] In one embodiment, the swing arm has a lower swing limit position corresponding to the bottom swing limit position of the first rack to be lifted, and the same swing arm has a swing angle limited between the upper swing limit position and the lower swing limit position, and the swing angle is set as an obtuse angle.

[0011] In one embodiment, the swing angle is β, and 90°<β≤160°.

[0012] In one embodiment, the lifting mechanism further comprises a connecting member, and the connecting member is used to directly or indirectly connect to the first storage rack of the household appliance;

[0013] The second hinged mounting portion of at least one of the swing arms is mounted on the connecting member.

[0014] In one embodiment, the lifting mechanism further includes a first guide rail, which includes a plurality of slide rails that are telescopically and slidably connected to each other, and the plurality of slide rails include at least a first slide rail and a tail slide rail. The first slide rail is connected to the connecting member, and the tail slide rail is used to connect to the first storage rack of the household appliance, so that the first storage rack can be switched between a bottom storage position and a bottom position to be lifted.

[0015] In one embodiment, the lifting mechanism further includes a locking structure, and the locking structure is used to prevent the swing arm and the first rack from rotating relative to each other after the first rack is lifted.

[0016] In one embodiment, the lifting mechanism further includes a connecting member, the second hinged mounting portion of at least one of the swing arms is mounted on the connecting member, and the locking structure includes a locking member that can be movably mounted relative to the connecting member in a front-to-rear direction, and the locking member is used to be mounted on the first storage rack;

[0017] A sliding fit structure is provided between the locking member and the swing arm. When the locking member moves in the front-to-back direction relative to the connecting member, the sliding fit structure slides and fits, so that the first storage rack can move from the top lifting limit position to the top locking position.

[0018] In one embodiment, the sliding fit structure includes a fitting slide groove and a sliding shaft that are slidably fitted with each other;

[0019] At least one of the matching sliding grooves includes an arcuate groove segment, and an extension path of the arcuate groove segment is at least partially adapted to the rotation of the sliding shaft;

[0020] The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the tail of the arc-shaped slot section to prevent the swing arm from swinging.

[0021] In one embodiment, a retaining rib is provided on the inner side wall at the tail end of the arc-shaped slot segment to limit the sliding shaft to be located within the arc-shaped slot segment.

[0022] In one embodiment, the sliding fit structure includes a fitting slide groove and a sliding shaft that are slidably fitted with each other;

[0023] At least one of the matching sliding grooves includes an arcuate groove section and a horizontal groove section, the extension path of the arcuate groove section is adapted to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arcuate groove section and extends from front to rear;

[0024] The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the horizontal groove section to prevent the swing arm from swinging.

[0025] In one embodiment, two groups of the sliding fitting structures are provided, the sliding shafts of the two groups of the sliding fitting structures are both provided on the same swing arm, and the matching grooves of the two groups of the sliding fitting structures are both provided on the locking member.

[0026] In one embodiment, the two sliding shafts in the two sets of sliding fitting structures include a first sliding shaft adjacent to the second hinged mounting portion, and a second sliding shaft away from the second hinged mounting portion;

[0027] The two mating grooves in the two groups of sliding mating structures include a first mating groove set corresponding to the first sliding shaft, and a second mating groove set corresponding to the second sliding shaft. The inlet of the first mating groove is opened at the lower side end of the locking member, and the inlet of the second mating groove is opened at the front side end of the locking member.

[0028] In one embodiment, the lifting mechanism further includes a first guide rail, the first guide rail including a plurality of slide rails that are telescopically and slidably connected to each other, the plurality of slide rails including at least a first slide rail and a tail slide rail, the first slide rail being connected to the connector, and the tail slide rail being used to connect to the first shelf of the household appliance;

[0029] The tail section slide rail is fixedly installed relative to the locking member.

[0030] In one embodiment, two swing arms are provided, and the locking structure stops the two swing arms and the first storage rack from rotating synchronously.

[0031] In one embodiment, two swing arms are provided, and the lifting mechanism further includes a connecting member, and the second hinged mounting portions of the two swing arms are hinged to the connecting member, and the connecting member is used to be connected to the first storage rack.

[0032] The present invention further provides a household appliance, comprising a housing, a lifting mechanism, and a first shelf, wherein the housing forms a receiving cavity, a fixed arm of the lifting mechanism is disposed on a side wall of the receiving cavity, and the first shelf is hingedly connected to a swing arm of the lifting mechanism;

[0033] The lifting mechanism enables the first shelf to be lifted and switched between a bottom position to be lifted and a top lifting limit position;

[0034] The lifting mechanism includes a fixed arm and at least one swing arm, wherein the fixed arm is mounted in the receiving cavity of the household appliance, and a first hinged mounting portion and a second hinged mounting portion are formed on the same swing arm, wherein the first hinged mounting portion is mounted on the fixed arm, and the second hinged mounting portion is directly or indirectly mounted on the first shelf;

[0035] The swing arm has an upper swing limit position, which is used to enable 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 back to front, the swing arm is tilted upward.

[0036] In one embodiment, the lifting mechanism further includes a connecting member and a first guide rail, the second hinged mounting portion of the swing arm is connected to the connecting member, the first guide rail includes a plurality of slide rails that are telescopically and slidably connected to each other, the plurality of slide rails including at least a first slide rail and a tail slide rail, the first slide rail is connected to the connecting member, and the tail slide rail is used to connect to the first storage rack of the household appliance so that the first storage rack can be pulled out from the bottom storage position to the bottom position to be lifted.

[0037] In one embodiment, the lifting mechanism further includes a locking structure, wherein the locking structure includes a locking member that can be movably installed relative to the first section slide rail in the front-rear direction, the locking member is provided on the first storage rack, and a sliding fitting structure is provided between the locking member and the swing arm, the sliding fitting structure includes a fitting slide groove and a sliding shaft that slide with each other, the fitting slide groove includes an arc-shaped groove section, the extension path of the arc-shaped groove section is at least partially adapted to the rotation of the sliding shaft, the locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the tail of the arc-shaped groove section to stop the swing arm from swinging, so as to enable the first storage rack to move from the top lifting limit position to the top locking position.

[0038] In one embodiment, the lifting mechanism further includes a locking structure, the locking structure including a locking member that can be movably installed relative to the first slide rail in the front-to-back direction, the locking member is provided on the first storage rack, a sliding matching structure is provided between the locking member and the swing arm, the sliding matching structure includes a matching slide groove and a sliding shaft that slidably match each other, the matching slide groove includes an arcuate groove section and a horizontal groove section, the extension path of the arcuate groove section is adapted to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arcuate groove section and extends from front to rear;

[0039] 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 arm from swinging, so that the first storage rack can move from the top lifting limit position to the top locking position.

[0040] In one embodiment, a second shelf is further provided in the accommodating cavity, and corresponding to the top lifting limit position, the lower end of the first shelf protrudes upward from the lower end of the second shelf.

[0041] In one embodiment, the household appliance includes a dishwasher, the first rack is configured as a lower basket, and the second rack is configured as an upper basket.

[0042] In the technical solution of the present invention, the first shelf is lifted by the swinging of the swing arm, so that the shelf can be lifted to the top lifting limit position. At the upper swing limit position, the swing arm is used to support the first shelf upward, and in the direction from back to front, the swing arm is tilted upward. Compared with the swinging of the swing arm to the horizontal direction, the swing arm can swing at a larger angle, so that the first shelf can be lifted to a greater height, thereby reducing the user's frequent bending during operation and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0044] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the household appliance provided by the present invention (the first shelf is in the bottom storage position, and the swing arm of the lifting mechanism is in the lower swing limit position);

[0045] Figure 2 for Figure 1 A schematic diagram of the main structure of a household appliance;

[0046] Figure 3 for Figure 1 The diagram includes a three-dimensional structure diagram of a lifting mechanism and a first storage rack;

[0047] Figure 4 for Figure 1 The main structural diagram of the lifting mechanism and the first storage rack is included;

[0048] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the household appliance in FIG (the first shelf is at the bottom position to be lifted, and the swing arm of the lifting mechanism is at the lower swing limit position);

[0049] Figure 6 for Figure 5 A schematic diagram of the main structure of a household appliance;

[0050] Figure 7 for Figure 5 A schematic diagram of the three-dimensional structure of a household appliance part;

[0051] Figure 8 for Figure 7 An enlarged schematic diagram of the local A in the middle;

[0052] Figure 9 for Figure 7 An enlarged schematic diagram of the part B in the middle;

[0053] Figure 10 for Figure 5 The main structural diagram of the lifting mechanism and the second storage rack is included;

[0054] Figure 11 for Figure 5 The diagram includes a three-dimensional structure diagram of a lifting mechanism and a first storage rack;

[0055] Figure 12 for Figure 5 The main structural diagram of the lifting mechanism and the first storage rack is included;

[0056] Figure 13 for Figure 5 The diagram includes a partial cross-sectional view of the lifting mechanism and the first storage rack;

[0057] Figure 14 for Figure 1 Schematic diagram of the three-dimensional structure of the household appliance in FIG (the first shelf is at the top lifting limit position, and the swing arm of the lifting mechanism is at the upper swing limit position);

[0058] Figure 15 for Figure 14 A schematic diagram of the main structure of a household appliance;

[0059] Figure 16 for Figure 14 A schematic diagram of the three-dimensional structure including a lifting mechanism, a first rack and a second rack;

[0060] Figure 17 for Figure 14 The main structural diagram of the lifting mechanism, the first rack and the second rack is included;

[0061] Figure 18 for Figure 14 The diagram includes a three-dimensional structure diagram of a lifting mechanism and a first storage rack;

[0062] Figure 19 for Figure 14 A schematic diagram of the main structure (one embodiment) including a lifting mechanism and a first storage rack;

[0063] Figure 20 for Figure 19 The diagram includes a partial cross-sectional view of the lifting mechanism and the first storage rack;

[0064] Figure 21 for Figure 14 A schematic diagram of the main structure of (another embodiment) including a lifting mechanism and a first storage rack;

[0065] Figure 22 for Figure 21 The diagram includes a partial cross-sectional view of the lifting mechanism and the first storage rack;

[0066] Figure 23 for Figure 1 Schematic diagram of the three-dimensional structure of the household appliance (the first shelf is in the top locking position, and the swing arm of the lifting mechanism is in the upper swing limit position);

[0067] Figure 24 for Figure 23 A schematic diagram of the main structure of a household appliance;

[0068] Figure 25 for Figure 23 The diagram includes a three-dimensional structure diagram of a lifting mechanism and a first storage rack;

[0069] Figure 26 for Figure 23 A schematic diagram of the main structure (one embodiment) including a lifting mechanism and a first storage rack;

[0070] Figure 27 for Figure 26 The diagram includes a partial cross-sectional view of the lifting mechanism and the first storage rack;

[0071] Figure 28 for Figure 23 A schematic diagram of the main structure of (another embodiment) including a lifting mechanism and a first storage rack;

[0072] Figure 29 for Figure 28 It includes a partial cross-sectional structural diagram of the lifting mechanism and the first storage rack.

[0073] Description of Figure Numbers:

[0074] 100. Lifting mechanism; 1. Fixed arm; 2. Swing arm; 21. First hinged mounting portion; 22. Second hinged mounting portion; 3. Connector; 4. First guide rail; 41. First slide rail; 42. Tail slide rail; 5. Locking structure; 5a. Locking member; 51. Sliding fit structure; 511. First matching slot; 5111. Horizontal slot section; 5112. Arc-shaped slot section; 5113. Clamping rib; 512. Second matching slot; 513. First sliding axis; 514. Second sliding axis; c. First plane reference line; e. Second plane reference line; d. Third plane reference line;

[0075] 1000, household appliance; 200, housing; 201, accommodating chamber; 2011, bottom wall; 2012, side wall; 300, first shelf; 400, second shelf; 500, second guide rail;

[0076] The functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0077] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0078] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0079] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, 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 number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0080] Household appliances with an internal space are usually equipped with a movable storage structure such as a shelf that can be extended from the interior of the household appliance. In the prior art, there are some movable storage structures that have both a pull-out function and a lifting function.

[0081] In some household appliances, storage racks are usually placed at the bottom of the household appliances. During use, operations such as taking and putting tableware require frequent bending. In order to reduce the frequency of bending during use of the storage rack, the existing technology uses a lifting mechanism to lift the storage rack before use, which can reduce the bending frequency. However, the existing lifting mechanism makes the storage rack lift to a low height, and users still need to bend frequently during use, resulting in a poor user experience.

[0082] In view of this, the present invention proposes a household appliance that can lift the shelf to a higher height, reducing the user's frequent bending during operation and improving the user experience, wherein: Figures 1 to 29 This is a structural diagram of the household appliance provided by the utility model.

[0083] See also Figures 1 to 2The present invention provides a household appliance 1000, which can be a dishwasher, oven, toaster oven, refrigerator, etc. The household appliance 1000 includes a housing 200, within which is formed a receiving cavity 201. A first storage rack 300 is connected to the receiving cavity 201 via a lifting mechanism 100. Utensils to be placed on the first storage rack 300 include tableware such as bowls, plates, chopsticks, and cutlery, as well as baked ingredients or items to be refrigerated.

[0084] In the present invention, the user is used as a direction reference, forward is the direction toward the user, or the direction from the back side of the household appliance 1000 toward the side of the household appliance 1000 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 of the household appliance 1000 with a door toward the back side of the household appliance 1000; up and down directions are the directions with gravity as a reference.

[0085] It should be noted that some household appliances 1000 have only one shelf, such as the first shelf 300. Some may have multiple shelves. In embodiments where multiple shelves are provided in the household appliance 1000, two shelves may be provided, such as the first shelf 300 and the second shelf 400. When the two shelves are positioned one above the other, they may be referred to as an upper shelf and a lower shelf. In the embodiments of the present invention, the first shelf 300 corresponds to the lower shelf, and the second shelf 400 corresponds to the upper shelf.

[0086] The first rack 300 needs to be moved out of the accommodating cavity 201 of the household appliance 1000, then lifted to a suitable position, and finally locked in a suitable position. Specifically, after the door of the household appliance 1000 is opened, the user needs to put items in or take out items from the first rack 300. The user often pulls the first rack 300 forward. During the movement of the first rack 300, a complex movement process occurs, that is, the first rack 300 moves forward and upward at the same time. At this time, the lifting mechanism 100 will follow the movement and support the first rack 300.

[0087] The first rack 300 has several important positions during its movement, the most common of which are the bottom storage position (such as the attached Figure 1 and Figure 2 As shown), the bottom position to be lifted (as shown in the attached Figure 5 and Figure 6 As shown), top lifting limit position (as shown in the attached Figure 14 and Figure 15 shown) and top locked position (as shown in the attached Figure 23 and Figure 24 shown).

[0088] In some embodiments, the first rack 300 may have only two positions, namely, a bottom position to be lifted and a top lifting limit position; the first rack 300 may also have three positions, namely, a bottom storage position, a bottom position to be lifted, and a top lifting limit position. In this case, the top lifting limit position and the top locking position of the first rack 300 may be the same position; the first rack 300 may also have four positions, namely, a bottom storage position, a bottom position to be lifted, a top lifting limit position, and a top locking position. In this case, the top lifting limit position and the top locking position of the first rack 300 are different positions.

[0089] The lifting mechanism 100 is mainly used to lift the first rack 300 . 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 rack 300 .

[0090] The lifting mechanism 100 within the household appliance 1000 often utilizes a linkage mechanism, i.e., a single linkage or a combination of multiple linkages is used to elevate the first shelf 300. In an embodiment with only one linkage, the linkage can be configured as a swing arm 2, with a first hinged mounting portion 21 and a second hinged mounting portion 22 formed at each end. The first hinged mounting portion 21 is hingedly connected to the accommodating cavity 201 of the housing 200 of the household appliance 1000, and the second hinged mounting portion 22 is connected to the first shelf 300. Furthermore, other supporting structures can be used to support the swinging motion of the swing arm 2. Alternatively, multiple linkage mechanisms can be employed, disposed on either side of the first shelf 300, i.e., two swing arms 2 are disposed on either side of the first shelf 300 to achieve swing-following motion. Thus, a single swing arm 2 can lift the first shelf 300 throughout its swing stroke.

[0091] Among the combinations of multiple connecting rods, a four-bar linkage is often used. Two of the connecting rods in the four-bar linkage can be configured as swing arms 2, that is, the lifting of the first storage rack 300 is achieved through the form of a double swing arm 2. In this way, the first storage rack 300 will have better stability during the lifting process, which will be described in detail in subsequent embodiments.

[0092] 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 lifting limit position, when the swing arm 2 is in the lower swing limit position, the corresponding first storage rack 300 is in the bottom position to be lifted; when the swing arm 2 is in the upper swing limit position, the corresponding first storage rack 300 is in the top lifting limit position.

[0093] When the first storage rack 300 has three positions, namely, a bottom storage position, a bottom position to be lifted, and a top lifting limit position, when the swing arm 2 is at the lower swing limit position, the corresponding first storage rack 300 is at the bottom storage position and the bottom position to be lifted; when the swing arm 2 is at the upper swing limit position, the corresponding first storage rack 300 is at the top lifting limit position.

[0094] When the first storage rack 300 has four positions, namely, a bottom storage position, a bottom position to be lifted, a top lifting limit position, and a top locking position, when the swing arm 2 is at the lower swing limit position, the corresponding first storage rack 300 is at the bottom storage position and the bottom position to be lifted; when the swing arm 2 is at the upper swing limit position, the corresponding first storage rack 300 is at the top lifting limit position and the top locking position.

[0095] It should be noted that the first hinged mounting portion 21 of the swing arm 2 serves as a fixed hinge point, and its position will not change. The swinging movement of the swing arm 2 only indicates the movable hinge point of the swing arm 2, that is, the movement of one end of the swing arm 2 provided with the second hinged mounting portion 22. The upper swing limit position of the swing arm 2 and the lower swing limit position of the swing arm 2 are both based on the movable end of the swing arm 2. That is, when the swing arm 2 is at the lower swing limit position, the end of the swing arm 2 provided with the second hinged mounting portion 22 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 provided with the second hinged mounting portion 22 is at the top limit position.

[0096] The household appliance 1000 in the present invention can lift the first shelf 300 to a higher position to reduce the user's bending. For the swing arm 2 in the connecting rod mechanism, two factors can be considered: one is the swing amplitude parameter of the swing arm 2. The larger the swing amplitude, the greater the height of the first shelf 300. Conversely, the lifting height is relatively small. The other is the installation position parameter of the fixed hinge point of the swing arm 2 in the accommodating cavity 201 of the household appliance 1000. Relative to the accommodating cavity 201 of the household appliance 1000, the higher the relative height of the installation position is, while avoiding other structures in the accommodating cavity 201, the greater the height of the first shelf 300. Conversely, the lifting height is relatively small.

[0097] 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 higher position. The above two factors can be considered either alone or simultaneously.

[0098] The swing amplitude parameters of the swing arm 2 can be characterized by the swing angle of the swing arm 2 and the vertical span between the first hinged mounting portion 21 and the second hinged mounting portion 22 when the swing arm 2 is in the upper swing limit position. The larger the swing angle, the greater the height to which the first storage rack 300 is lifted; conversely, the height to which the first storage rack 300 is lifted is relatively small. Regarding the vertical span between the first hinged mounting portion 21 and the second hinged mounting portion 22 when the swing arm 2 is in the upper swing limit position, the larger the span, the greater the height to which the first storage rack 300 is lifted; conversely, the height to which the first storage rack 300 is lifted is relatively small. For the swing arm 2, a larger span also requires a longer length.

[0099] In some embodiments, see Figure 14 、 Figure 15 as well as 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 accommodating cavity 201 of the household appliance 1000. The same swing arm 2 is formed with a first hinged mounting portion 21 and a second hinged mounting portion 22. The first hinged mounting portion 21 is installed on the fixed arm 1, and the second hinged mounting portion 22 is used to be directly or indirectly installed on the first storage rack 300.

[0100] The swing arm 2 has an upper swing limit position, which is used to enable the first storage rack 300 to be in the top lifting 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 tilted upward.

[0101] In the technical solution of the present invention, the first storage rack 300 is lifted by the swinging of the swing arm 2, so that the storage rack can be lifted to the top lifting 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 tilted upward. Compared with the swinging of the swing arm 2 to the horizontal direction, the swing arm 2 can swing at a larger angle, so that the first storage rack 300 can be lifted to a greater height, thereby reducing the user's frequent bending during operation and improving the user experience.

[0102] There is no limit to the number of the swing arms 2, and there may be only one or two. In the embodiment where there are two swing arms 2, part of the structure of the lifting mechanism 100 constitutes a four-bar structure, which is a parallelogram four-bar structure.

[0103] In all the following embodiments, one or two swing arms 2 may be provided, which will not be described in detail here.

[0104] The first hinged mounting portion 21 and the second hinged mounting portion 22 are primarily configured to enable the swing arm 2 to rotate relative to the fixed arm 1 and relative to the first storage rack 300. The specific configuration of the first hinged mounting portion 21 and the second hinged mounting portion 22 is not limited. For example, the first hinged mounting portion 21 and the second hinged mounting portion 22 can both be configured as holes, or both can be configured as shafts, or one can be a shaft and the other a hole.

[0105] In the technical solution of the present invention, the angle of the swing arm 2 relative to the horizontal direction when in the upper swing limit position is not limited. In some embodiments, corresponding to the upper swing limit position, the angle between the line connecting the rotation centers of the first hinged mounting part 21 and the second hinged mounting part 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 angle, the greater the lifting height of the first storage rack 300. Taking into account that the swing arm 2 needs to cooperate with other structures to achieve lifting, and also taking into account some interference factors and the structural strength of the swing arm 2, setting the maximum angle of 70° is a relatively reasonable value.

[0106] It should be noted that the 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 angle value between any two of the above integers, such as the degrees between 0° and 10° can be 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc. It can also be a degree between 10° and 20°, a degree between 20° and 30°, a degree between 30° and 40°, a degree between 40° and 50°, a degree between 50° and 60°, and of course it can also be some decimal degree values. The above values ​​are all within the protection scope of this utility model.

[0107] It can be understood that, when the angle α is large, the lifting height of the first rack 300 is large, the first rack 300 is close to the shell 200 of the household appliance 1000 in the front-to-back direction, and when the lifting mechanism 100 lifts the first rack 300, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200 is large; when the angle α is small, the lifting height of the first rack 300 is small, the first rack 300 is away from the shell 200 of the household appliance 1000 in the front-to-back direction, and when the lifting mechanism 100 lifts the first rack 300, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200 is small.

[0108] When the angle α is 70°, the first shelf 300 can be raised to a higher position (in the embodiment where the household appliance 1000 has a second shelf 400, the bottom of the first shelf 300 is higher than the bottom of the second shelf 400), thereby meeting the requirement of raising the first shelf 300 to a greater height and improving the user experience.

[0109] In some embodiments, two swing arms 2 are provided, and the two swing arms 2 are staggered so that when the two swing arms 2 are swung to the extreme position, their projections in the vertical plane can at least partially overlap; when the angle α is 70°, the rotation centers of the two first hinged mounting parts 21 of the two swing arms 2 and the second hinged mounting parts 22 of the two swing arms 2 can be arranged in a collinear manner at four points to meet the maximum height lifting requirement of the first storage rack 300.

[0110] After the first rack 300 is raised to its upper limit and items are placed in and out of the first rack 300, the rack 300 needs to be lowered and placed back. During this process, the user needs to apply a driving force to the rack 300 to cause the swing arm 2 to swing downward with the first hinged mounting portion 21 as the rotation center. The value of the angle α affects the force applied by the user.

[0111] Specifically, when the angle α is large, the lever arm for the user to press down the first rack 300 is small, and the force required to drop and put back the first rack 300 is large; when the angle α is small, the lever arm for the user to press down the first rack 300 is large, and the force required to drop and put back the first rack 300 is small.

[0112] The value of the angle α needs to take into account various factors such as the lifting height of the first rack 300, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200, and the amount of force required to drop and replay the first rack 300. When the angle α is less than 70 degrees, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200 is small. ， This element will not be described in detail later.

[0113] In some embodiments, the angle α may be between 15° and 50°, so that the first rack 300 can be lifted to a higher and appropriate position, and the force required to lower and place the first rack 300 back is moderate.

[0114] The following describes the relationship between the angle α and the lifting height of the first rack 300 and the force required to lower and place the first rack 300 , and takes the angle α of 70° as a reference example.

[0115] When the angle α is set to 15°, the angle is reduced by 55° compared to the reference example, resulting in a decrease of approximately 0.7 times in the maximum height to which the first shelf 300 can be raised. This significantly increases the lever arm required to apply downward force to the first shelf 300 by approximately 1.8 times, significantly reducing user effort. When the angle α is set to 15°, the force required to lower the first shelf 300 is prioritized. In this embodiment, the first shelf 300 can be raised to an appropriate maximum height, requiring less force to lower the first shelf 300. This makes operating the household appliance 1000 easier and more convenient, improving the user experience.

[0116] When the angle α is set to 50°, the angle is reduced by 20° compared to the reference example, resulting in a decrease of approximately 0.2 times in the maximum height to which the first shelf 300 can be raised. The force arm required by the user to press down on the first shelf 300 increases by approximately 1.2 times, significantly reducing the height and allowing the first shelf 300 to be positioned at a relatively high height. When the angle α is set to 50°, the lifting height of the first shelf 300 is prioritized. In this embodiment, the force required to lower and re-position the first shelf 300 is moderate, allowing the first shelf 300 to be raised to a suitable high position, thus meeting the maximum height requirement for the first shelf 300.

[0117] In some preferred embodiments, when the angle α is approximately 25°, the angle is reduced by 45° relative to the reference example, resulting in a decrease of approximately 0.6 times in the maximum height that the first rack 300 can be raised to, which is a moderate decrease in height. The lever arm required for the user to press down on the first rack 300 is increased by approximately 1.6 times, which is a moderate increase in the lever arm, taking into account both the lifting height of the first rack 300 and the force required to lower and retract the first rack 300.

[0118] Regarding the vertical span between the first hinged mounting portion 21 and the second hinged 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 vertical span of the rotation centers of the first hinged mounting portion 21 and the second hinged 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 to which the first storage rack 300 is 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.

[0119] 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, such as a span value between 0 and 50mm, which can be 10mm, 20m, 30m, 40mm, etc. Of course, it can also be a span value between 150mm and 200mm, which can be 160mm, 170m, 180m, 190mm, etc.; it can also be a span value between 50mm and 100mm, or a span value between 100mm and 150mm, or a 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 this utility model.

[0120] It is understood that the larger the span L1, the greater the height of the first shelf 300. Assuming the swing arm 2's swing limit angle α remains unchanged, raising the first shelf 300 to a greater height requires a longer swing arm 2. When the first shelf 300 is raised to its upper limit, it occupies a greater amount of space outside the housing 200 of the household appliance 1000.

[0121] When the span L1 is 235 mm, Figure 19 As shown, the first rack 300 can be lifted to a higher position (in the embodiment where the household appliance 1000 has a second rack 400, the bottom of the first rack 300 is higher than the bottom of the second rack 400), meeting the lifting requirement of a large height.

[0122] In some embodiments, the value of the span L1 can be between 60 mm and 190 mm. The following is explained using the span L1 value, the maximum swing angle of the swing arm 2, and the length of the swing arm 2, and the span L1 value of 235 mm and the maximum swing angle of the swing arm 2 of 70° are used as reference examples for explanation.

[0123] When the span L1 is 60 mm, the span is reduced by approximately 175 mm relative to the reference example, resulting in the arm length of the swing arm 2 being shortened by approximately 0.7 times. When the first shelf 300 is raised to the top lifting limit position, the first shelf 300 occupies a relatively small amount of external space of the housing 200 of the household appliance 1000, thereby saving usable space.

[0124] When the span L1 is 190 mm, the span is reduced by approximately 45 mm relative to the reference example, resulting in the arm length of the swing arm 2 being shortened by approximately 0.2 times, and the raised height of the first shelf 300 being reduced by approximately 0.2 times. When the first shelf 300 is raised to the top lifting limit position, the first shelf 300 occupies a moderate amount of external space of the housing 200 of the household appliance 1000, and the raised height of the first shelf 300 is relatively large.

[0125] 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 shortened by about 0.5 times, and the maximum height that the first shelf 300 can be lifted to is reduced by about 0.6 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a relatively moderate amount of external space of the shell 200 of the household appliance 1000, saving usable space. The height of the first shelf 300 is moderate, meeting the lifting requirements of a large height.

[0126] It can be understood that the value of the angle α and the value of the span L1 are correlated with each other. When the arm length of the swing arm 2 remains unchanged, the value of the angle α and the value of the span L1 are positively correlated, that is, the larger the value of the angle α, the larger the span L1, the greater the height that the first shelf 300 can be lifted, and the closer the first shelf 300 is to the housing of the household appliance 1000 in the front-to-back direction, the faster the lifting mechanism 100 will lift the first shelf 300. ， The greater the risk of interference between the first storage rack 300 and other structures disposed in the upper space of the housing 200 .

[0127] The value of the angle α is positively correlated with the value of the span L1, that is, the smaller the value of the angle α, the smaller the span L1, the smaller the height to which the first shelf 300 can be lifted, and the further the first shelf 300 is away from the housing of the household appliance 1000 in the front-to-back direction, the smaller the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 during the process of the lifting mechanism 100 lifting the first shelf 300. 。

[0128] In some embodiments, the value of the angle α can be between 15° and 50°, and the corresponding value of the span L1 can be between 60mm and 190mm. Please refer to the above-mentioned relevant explanations on the value of the angle α and the value of the span L1, which will not be repeated here.

[0129] The upper swing limit position of the swing arm 2 defines the upper swing limit position of the swing arm 2. When the lower swing limit position of the swing arm 2 is taken into consideration, the swing angle of the same swing arm 2 between the lower swing limit position and the upper swing limit position is taken as the object of consideration. In some embodiments, please continue to refer to Figure 19 The swing arm 2 has a lower swing limit position corresponding to the position of the bottom of the first storage rack 300 to be raised, and the swing arm 2 has a swing angle limited to between the upper swing limit position and the lower swing limit position, and the swing angle is set as an obtuse angle. Such a setting increases the swing angle of the swing arm 2, so that the first storage rack 300 can be moved to a higher position, raising the height of the first storage rack 300, reducing the frequency of bending of the user during use, and improving the user experience.

[0130] The swing angle is the angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. The 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.

[0131] See also Figure 19 , Figure 19 The figure shows the lower swing limit position and the upper swing limit position of the swing arm 2. The swing angle is the angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. In the embodiment where there are two swing arms 2, the swing angles of the two swing arms 2 are set to be the same.

[0132] In the technical solution of the present invention, 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 160° is a relatively reasonable value.

[0133] 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 angle value between any two of the above integers, such as the degrees between 90° and 100° can be 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, etc., or a degree between 100° and 110°; a degree between 110° and 120°; a degree between 120° and 130°; a degree between 130° and 140°; a degree between 140° and 150°; a degree between 150° and 160°; and of course, some decimal degree values. All of the above values ​​are within the scope of protection of the present utility model.

[0134] When the swing arm 2 is at the lower swing limit position, the swing arm 2 can be tilted, that is, the swing arm 2 enters the accommodating 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 accommodating cavity 201 of the household appliance 1000 in a vertical state.

[0135] In the embodiment in which the swing arm 2 enters the accommodating cavity 201 of the household appliance 1000 in an inclined manner, an angle is formed between the line connecting the rotation centers of the first hinged mounting portion 21 and the second hinged mounting portion 22 of the same swing arm 2 and the up and down directions. 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 a smaller obtuse angle.

[0136] In the embodiment in which the swing arm 2 enters the accommodating cavity 201 of the household appliance 1000 in a vertical state, the line connecting the rotation centers of the first hinged mounting part 21 and the second hinged mounting part 22 of the same swing arm 2 extends in the up and down directions. At this time, the swing angle of the swing arm 2 between the lower swing limit position and the upper swing limit position is an obtuse angle setting.

[0137] Therefore, regardless of whether the swing arm 2 enters the accommodating cavity 201 of the household appliance 1000 in an inclined manner at its lower limit position, or enters the accommodating cavity 201 of the household appliance 1000 in a vertical state, the swing angle β is set as an obtuse angle, which can ensure that the angle α is greater than 0. Relative to the horizontal state of the swing arm 2, the first storage rack 300 can be swung up to a greater height, reducing the user's frequent bending during operation and improving the user experience.

[0138] It can be understood that the value of the swing angle β is determined by the upper swing limit position of the swing arm 2 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 angle α. The larger the value of the angle α, the larger the swing angle β; the lower swing limit position of the swing arm 2 is determined by the size of 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, under the premise that the upper swing limit position of the swing arm 2 is fixed, the swing angle β defined when the swing arm 2 enters in an inclined state is smaller than that when the swing arm 2 enters in a vertical state. Therefore, the following is mainly explained based on the swing arm 2 entering in a vertical state.

[0139] When the angle β is at its limit of 160°, the corresponding angle α is 70°, and the first shelf 300 can be lifted to a higher position (in the embodiment where the household appliance 1000 has a second shelf 400, the bottom of the first shelf 300 is higher than the bottom of the second shelf 400). At this time, the first shelf 300 is as close as possible to the housing 200 of the household appliance 1000, meeting the larger lifting height requirement and reducing the risk of interference with the first shelf 300 during movement.

[0140] After the first rack 300 is raised to its upper limit and items are placed in and out of the first rack 300, the rack 300 needs to be lowered and placed back. During this process, the user needs to apply a driving force to the rack 300 to cause the swing arm 2 to swing downward with the first hinged mounting portion 21 as the rotation center. The value of the angle β determines the value of the angle α. As previously described, the value of the angle β also affects the force applied by the user.

[0141] Specifically, when the angle β is large, the lever arm for the user to press down the first rack 300 is small, and the force required to drop and put back the first rack 300 is large; when the angle β is small, the lever arm for the user to press down the first rack 300 is large, and the force required to drop and put back the first rack 300 is small.

[0142] The value of the angle β needs to take into account various factors such as the lifting height of the first rack 300, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200, and the amount of force required to drop and replay the first rack 300. When the angle β is less than 160 degrees, the risk of interference between the first rack 300 and other structures provided in the upper space of the shell 200 is small. ，This element will not be described in detail later.

[0143] In some embodiments, the angle β may be between 105° and 140°, so that the first rack 300 can be lifted to a higher and appropriate position, and the force required to lower and place the first rack 300 back is moderate.

[0144] The following describes the relationship between the value of the angle β and the lifting height of the first rack 300 and the force required to lower and place the first rack 300 , and takes the value of the angle β of 160° as a reference example.

[0145] When the β angle is set to 105°, the angle is reduced by 55° compared to the reference example, resulting in a decrease of approximately 0.7 times in the maximum height that the first shelf 300 can be raised. The force arm required by the user to press down on the first shelf 300 increases by approximately 1.8 times. This significant increase in force arm reduces user effort. When the β angle is set to 105°, the force required to lower and reposition the first shelf 300 is prioritized. In this embodiment, the first shelf 300 can be raised to the desired maximum height, requiring less force to lower and reposition the first shelf 300. This makes operating the household appliance 1000 easier and more convenient, improving the user experience.

[0146] When the angle β is set to 140°, the angle is reduced by 20° compared to the reference example, resulting in a decrease of approximately 0.2 times in the maximum height to which the first shelf 300 can be raised. The force arm required by the user to press down on the first shelf 300 increases by approximately 1.2 times, significantly reducing the height and allowing the first shelf 300 to be positioned at a relatively high height. When the angle β is set to 140°, the lifting height of the first shelf 300 is prioritized. In this embodiment, the force required to lower and retract the first shelf 300 is moderate, allowing the first shelf 300 to be raised to a suitable high position, thus meeting the maximum height requirement for the first shelf 300.

[0147] In some preferred embodiments, when the angle β is approximately 115°, the angle is reduced by 45° relative to the reference example, resulting in a decrease of approximately 0.6 times in the maximum height that the first rack 300 can be raised to, which is a moderate decrease in height. The lever arm required for the user to press down on the first rack 300 is increased by approximately 1.6 times, which is a moderate increase in the lever arm, taking into account both the lifting height of the first rack 300 and the force required to lower and retract the first rack 300.

[0148] The second hinged 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 hinged fitting portion may be directly provided on the first storage rack 300, and the second hinged mounting portion 22 may be installed in cooperation with the hinged fitting portion to achieve hinged connection; or the connection may be 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.

[0149] In some embodiments, see Figure 3 、 Figure 11 or Figure 12 、 Figure 18 、 Figure 25 or Figure 26 The lifting mechanism 100 also includes a connecting member 3, which is used to directly or indirectly connect to the first storage rack 300 of the household appliance 1000. The second hinged mounting portion 22 of at least one swing arm 2 is installed on the connecting member 3. By providing the connecting member 3, a hinged matching portion can be provided on the connecting member 3, which can simplify the structure of the first storage rack 300 and facilitate the installation of the first storage rack 300.

[0150] It should be noted that during the entire movement of the lifting mechanism 100 , the state of the connecting member 3 remains unchanged. Thus, the state of the first storage rack 300 remains unchanged during the entire movement, thereby ensuring better stability for the storage of items to be placed.

[0151] Furthermore, the portion of the connector 3 used to connect to the first shelf 300 can be always set to a horizontal state, so that the first shelf 300 is always in a horizontal state during the activity. It should be noted that the horizontal state can be absolutely horizontal or at a certain angle to the horizontal direction, for example, within a range of 10°.

[0152] When the connecting member 3 is directly connected to the first rack 300, the first rack 300 has only two positions: a bottom position to be raised and a top position to be raised to a maximum extent. When the connecting member 3 is indirectly connected to the first rack 300, the first rack 300 can have three positions: a bottom storage position, a bottom position to be raised, and a top position to be raised to a maximum extent.

[0153] In some embodiments, see Figure 3 、 Figure 11 or Figure 12 、 Figure 18 、 Figure 25 or Figure 26The lifting mechanism 100 also includes a first guide rail 4, which includes a plurality of slide rails that are telescopically and slidably connected to each other. The plurality of slide rails include at least a first slide rail 41 and a tail slide rail 42. The first slide rail 41 is connected to the connector 3, and the tail slide rail 42 is used to connect the first shelf 300 of the household appliance 1000, so that the first shelf 300 can be switched between a bottom storage position and a bottom position to be lifted. The positional relationship of the first shelf 300 relative to the connector 3 can be adjusted through the telescopic movement of the first guide rail 4. In this way, the first shelf 300 can be moved to the bottom storage position and stored in the accommodating cavity 201.

[0154] The first guide rail 4 is set as a multi-section slide rail. In the technical solution of the present invention, there is no limit to the number of the slide rails. For example, it can be a 2-section slide rail. For the 2-section slide rail, the first section is the first section slide rail 41, and the second section is the tail section slide rail 42. It can also be a 3-section slide rail. For the 3-section slide rail, the first section is the first section slide rail 41, the second section is the middle section slide rail, and the third section is the tail section slide rail 42. It can also be a multi-section slide rail with more than 3 sections. For the multi-section slide rail with more than 3 sections, the first section is the first section slide rail 41, and the last section is the tail section slide rail 42. The sections between the first section slide rail 41 and the tail section slide rail 42 are all middle slide rails. The number of the slide rails can be 4 sections, 5 sections, 6 sections, 7 sections, and so on.

[0155] The connecting member 3 is connected to the first section of the slide rail 41, and the connection can be achieved by bonding or welding, that is, the connecting member 3 can be glued to the first section of the slide rail 41; of course, welding can also be used, for example, the connecting member 3 and the first section of the slide rail 41 are both set to metal materials, such as iron or steel, and the connecting member 3 can be welded to the first section of the slide rail 41.

[0156] In some embodiments, the connecting member 3 and the first section of the slide rail 41 are integrally formed, that is, the connecting member 3 and the first section of the slide rail 41 are one component, which reduces the number of parts and saves assembly time and cost.

[0157] The tail section slide rail 42 is connected to the first rack 300. The first rack 300 can generally be formed by a number of small round ribs arranged alternately in the horizontal or vertical direction. The connection of the slide rail can be assisted by a connecting block. The connecting block is provided with some mechanisms such as slots for clamping the small round ribs on the first rack 300. The connecting block is also provided with a screw connection structure, which is directly connected to the tail section slide rail 42 through the screw connection structure, thereby making the connection more secure.

[0158] After the lifting mechanism 100 lifts the first rack 300 to a suitable position, the first rack 300 needs to be locked to prevent the first rack 300 from falling back due to gravity rather than human intervention, thereby reducing 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, which is used to prevent the swing arm 2 and the first rack 300 from rotating relative to each other after the first rack 300 is lifted. That is, the locking structure 5 locks the first rack 300, so that the swing arm 2 and the first rack 300 are prevented from rotating relative to each other. During use by a user, unless manually unlocked, the swing arm 2 and the first rack 300 always remain in a relatively fixed rotation state. In this way, the user can conveniently operate when taking and placing items to be placed, and the user experience is good.

[0159] It should be noted that the specific structural form of the locking structure 5 is not limited. For example, locking can be achieved by plugging and matching a pin and a hole in the front-to-back direction. Locking is achieved when the pin and the hole match, and unlocking is achieved when the pin and the hole are separated. In some other embodiments, an auxiliary lever structure can also be used to achieve it, such as setting a card slot extending in the left and right directions, and realizing the movement of the card shaft through the lever structure. When the user operates the lever structure, the movement of the card shaft is driven to realize the matching of the card shaft and the card slot. The card slot is set as a special-shaped slot, which can limit the movement in the front-to-back direction. In this way, in a vertical plane, there are two hinged matching structures that are not coaxial, so locking can be achieved, and user operation is also convenient.

[0160] In some of the above embodiments, the cross-sections of the pins or the locking shafts can be non-circular, such as entirely square, rectangular, or the like. Of course, a combination of circular and straight edges is also possible, as long as there are straight edges on the cross-section to prevent rotation. The corresponding cross-sections of the holes and the locking slots can also be configured to prevent rotation.

[0161] It should be noted that the locking of some of the above-mentioned locking structures 5 may not require 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 in the top lifting limit position, it is also in the top locking position, and the two positions are the same position.

[0162] In the embodiment in which the first storage rack 300 is movably locked relative to the swing arm 2, the first storage rack 300 can be movably locked in the front-to-back direction, such as being locked by being pulled forward or pushed backward. The first storage rack 300 moves upward and forward during the swinging movement of the swing arm 2. Therefore, locking by being pulled forward is more in line with the user's usage habits.

[0163] In some embodiments, the lifting mechanism 100 further includes a connecting member 3 , and the locking structure 5 includes a locking member 5 a that can be movably installed relative to the connecting member 3 in the front-to-back direction, and the locking member 5 a is used to be installed on the first storage rack 300 .

[0164] It should be noted that, in the forward-pull locking mode, the first storage rack 300 is locked by being moved 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, and the first storage rack 300 is in two different positions.

[0165] A sliding fit structure 51 is provided between the locking member 5a and the swing arm 2. When the locking member 5a moves forward relative to the connecting member 3, the sliding fit structure 51 slides and fits, so that the first storage rack 300 can move from the top lifting limit position to the top locking position. The forward pull-out locking of the first storage rack 300 can be achieved through the cooperation of the sliding fit structure 51, without the need for additional complex locking and unlocking mechanisms, making user operation more convenient.

[0166] In the technical solution of the present invention, the specific structural form of the sliding fitting structure 51 is not limited. For example, two mutually fitting structures, one can be a shaft and the other can be a rib or a groove, or a fitting method in which part is a rib and part is a groove.

[0167] In some embodiments, see Figure 21 、 Figure 22 、 Figure 28 and Figure 29The sliding engagement structure 51 includes a mating groove and a sliding shaft that slidably engage with each other. At least one of the mating grooves includes an arcuate groove segment 5112. The extension path of the arcuate groove segment 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 arcuate groove segment 5112 to prevent the swing arm 2 from swinging. That is, the sliding shaft can be locked by simply setting the arcuate groove segment 5112, without the need for additional complex groove structures or other mechanisms. The structure is simple, and it also conforms to user operating habits, improving the user experience.

[0168] It should be noted that the arc-shaped groove section 5112 has an upper groove wall and a lower groove wall in the up and down directions, and the sliding shaft abuts against the upper groove wall or the lower groove wall to achieve positioning limitation in the up and down directions.

[0169] The arc radius of each part of the arc-shaped groove segment 5112 can be consistent, or the arc radius of each part of the arc-shaped groove segment 5112 can be inconsistent, and it can be formed by splicing together multiple arc-shaped groove segments with different radii. All of the above are within the scope of protection of the present utility model. For the mating slide groove, only the arc-shaped groove segment 5112 can be set, and there is no need to set up other groove segments.

[0170] In addition, in order to further limit the position of the sliding shaft, in some embodiments, a retaining rib 5113 is provided on the inner side wall at the tail end of the arcuate slot section 5112 to confine the sliding shaft within the arcuate slot section 5112. On the one hand, the retaining rib 5113 has the function of limiting the rotation of the sliding shaft, reducing the sliding of the sliding shaft in the front-to-back direction within the arcuate slot section 5112, so that the swing arm 2 and the first storage rack 300 can be relatively fixed in rotation; on the other hand, the retaining rib 5113 has a tactile sense of rotation into position. During operation, when the sliding shaft slides to the position of the retaining rib 5113, the width of the arcuate slot section 5112 is narrowed at the retaining rib 5113. The user needs to apply a little force to pass through. Once passed, the sliding shaft reaches the appropriate position, prompting the user that the operation is in place, thereby improving the user experience.

[0171] In some embodiments, see Figure 13 、 Figure 20 and Figure 27 The mating groove includes an arcuate groove section 5112 and a horizontal groove section 5111. The extension path of the arcuate groove section 5112 is adapted to the rotation of the sliding shaft. The horizontal groove section 5111 is connected to the tail of the arcuate groove section 5112 and extends from front to rear. 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 to stop the swing arm 2 from swinging.

[0172] The horizontal groove section 5111 has an upper groove wall and a lower groove wall in the up and down directions, and the sliding shaft abuts against the upper groove wall or the lower groove wall to achieve positioning limitation in the up and down directions. 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 locking is achieved by the cooperation between the sliding shaft and the matching slide groove. No additional mechanism is required, and the structure is simple. In addition, the provision of the horizontal groove section 5111 makes the first storage rack 300 move more smoothly relative to the connecting member 3, and the user's operation is smoother. At the same time, it also conforms to the user's operating habits and improves the user experience.

[0173] The present invention does not limit the specific setting positions of the sliding shaft and the matching groove. For example, the sliding shaft may be arranged on the swing arm 2, and the matching groove may be arranged on the locking member 5a; or the sliding shaft may be arranged on the locking member 5a, and the matching groove may be arranged on the swing arm 2.

[0174] It should be noted that the present invention does not limit the specific sliding engagement between the sliding shaft and the mating groove. For example, the sliding shaft may have a smaller diameter and a larger width, and the sliding shaft and the mating groove may have a clearance engagement. The sliding shaft may be inserted into the mating groove to a greater depth, such as with the end face of the sliding shaft directly contacting the bottom wall 2011 of the mating groove, or with a predetermined distance therebetween.

[0175] Since the sliding shaft will rotate relative to the mating groove for a long time, the sliding shaft and the locking member 5a can be set to different materials, such as the sliding shaft is set to copper material, and the locking member 5a is set to iron material; or the sliding shaft is set to iron material, and the locking member 5a is set to copper material. In some embodiments, the sliding shaft is set to iron material or steel material or other materials with higher hardness, and the locking member 5a is set to plastic material.

[0176] In addition, there is no limitation on the shape of the locking member 5a, and it can be a plate, a block, a column or other shapes.

[0177] In some embodiments, a bearing can be further provided between the sliding shaft and the mating groove. Through the rotation of the bearing, the relative movement between the sliding shaft and the mating groove is converted into relative rotation between the outer ring of the bearing and the mating groove, thereby reducing the wear and loss of the sliding shaft.

[0178] Of course, in some other embodiments, a roller may be sleeved on the sliding shaft, and the material of the roller may be set to plastic material or rubber material, etc.

[0179] The mating groove can be provided on the locking member 5a or on the swing arm 2. In some embodiments, the mating groove is provided on the locking member 5a, and two groups of sliding mating structures 51 are provided. The sliding axes of the two groups of sliding mating structures 51 are both provided on the same swing arm 2, and the mating grooves of the two groups of sliding mating structures 51 are both provided on the locking member 5a. By providing two groups of sliding mating structures 51, the locking stability of the first storage rack 300 is improved.

[0180] Since the sliding axes of the two sets of sliding fitting structures 51 are in different positions relative to the second hinged mounting portion 22, the corresponding rotation radii and the corresponding rotation arc trajectories are also different. For the same locking member 5a, the trajectory lines formed on the locking member 5a are different.

[0181] Specifically, see Figure 13 、 Figure 19 and Figure 27 The two sliding shafts include a first sliding shaft 513 adjacent to the second hinged mounting portion 22 and a second sliding shaft 514 away from the second hinged mounting portion 22 .

[0182] The two mating grooves include a first mating groove 511 arranged corresponding to the first sliding shaft 513, and a second mating groove 512 arranged corresponding to the second sliding shaft 514. The introduction port of the first mating groove 511 is opened at the lower side end of the locking member 5a, and the introduction port of the second mating groove 512 is opened at the front side end of the locking member 5a. By introducing at different positions, the stability of the first storage rack 300 during the lifting process is better.

[0183] The inlet of the first mating slot 511 is opened at the lower side end of the locking member 5a, and the inlet of the second mating slot 512 is opened at the front side end of the locking member 5a. The first sliding shaft 513 and the second sliding shaft 514 are respectively installed in correspondence, and when the swing arm 2 swings between the lower swing limit position and the upper swing limit position, the first sliding shaft 513 and the second sliding shaft 514 alternately perform similar horizontal sliding and up and down sliding, so that the first storage rack 300 is in a stable state.

[0184] The first storage rack 300 is connected to the locking member 5a. In order to enable the first storage rack 300 to move linearly in the front-to-back direction relative to the connecting member 3, as described above, a first guide rail 4 is provided between the connecting member 3 and the locking member 5a. The first guide rail 41 and the tail guide rail 42 of the first guide rail 4 can move linearly in the front-to-back direction relative to the connecting member 3 through relative movement.

[0185] In an embodiment in which two swing arms 2 are provided, the above-mentioned locking structure 5 can be provided on both of the swing arms 2. By providing two locking structures 5 to respectively lock the two swing arms 2 and repeatedly lock, the first storage rack 300 is more securely locked in the top locking position, thereby reducing the risk of falling on its own.

[0186] In some embodiments, the locking structure 5 only prevents one of the swing arms 2 and the first storage rack 300 from rotating relative to each other, and any one of the two swing arms 2 is sufficient.

[0187] 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, namely, the fixed arm 1, the two swing arms 2, and the connecting member 3. The four-bar linkage is configured as a parallelogram linkage. Therefore, the two swing arms 2 can be installed in the fixed arm 1 in one position and the other position. In some embodiments, when both swing arms 2 are in the lowered extreme position, the two swing arms 2 include a first swing arm on the left and a second swing arm on the right. The first swing arm is installed in the lower position on the fixed arm 1, and the second swing arm is installed in the upper position on the fixed arm 1.

[0188] As for the two sliding shafts, both are 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, which facilitates the cooperation and locking of the second swing arm and the locking piece 5a provided on the storage rack.

[0189] In addition, it should be noted that, in the household appliance 1000, two lifting mechanisms 100 are provided and are spaced apart in the left and right directions, that is, two support points are formed on both sides of the first storage rack 300 in the left and right directions. By providing two lifting mechanisms 100, the first storage rack 300 can be stably lifted.

[0190] Of course, in the embodiment where two lifting mechanisms 100 are provided, two or four swing arms 2 may be provided to jointly support the first storage rack 300 .

[0191] In the lifting mechanism 100 , a damping structure such as a gas strut or a spring may be provided between the swing arm 2 and the fixed arm 1 to reduce the force exerted by the user when lifting or lowering the first storage rack 300 .

[0192] The following describes some specific structures of the household appliance 1000 in detail in combination with some features of the lifting mechanism 100 proposed in the present invention.

[0193] The household appliance 1000 includes a shell 200, which forms a accommodating cavity 201. The shell 200 also has an opening on the front side, and a door is provided at the opening. The door 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, the first storage rack 300 is lifted and extended out of the accommodating cavity 201 for the user to take out or put in items to be placed.

[0194] The accommodating 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 accommodating cavity 201 with the connection position of the side walls 2012 as a hinge point to achieve the lifting of the first storage rack 300.

[0195] Corresponding to the household appliance 1000, the first shelf 300 can have two positions, namely, a bottom position to be raised and a top limit position. Considering the embodiment in which the first shelf 300 can move in the front-to-back direction relative to the connecting member 3, the first shelf 300 can have three positions, namely, a bottom storage position, a bottom position to be raised, and a top limit position. Considering the embodiment in which the first shelf 300 can be locked relative to the connecting member 3 in a forward movement, the first shelf 300 can have four positions, namely, a bottom storage position, a bottom position to be raised, a top limit position, and a top locked position.

[0196] Specifically, in an embodiment in which the lifting mechanism 100 further includes a first guide rail 4, the first section slide rail 41 is connected to the connector 3, and the tail section slide rail 42 is used to connect the first storage rack 300 of the household appliance 1000. Therefore, during the mutual movement of the first section slide rail 41 and the tail section slide rail 42, the relative position between the first storage rack 300 and the connector 3 changes, thereby enabling the first storage rack 300 to be pulled out from the bottom storage position to the bottom position to be lifted. In this way, the first storage rack 300 can be placed further back in the accommodating cavity 201, thereby increasing the activity space of the first storage rack 300.

[0197] In some embodiments, the lifting mechanism 100 further includes a locking structure 5, wherein the locking structure 5 includes a locking member 5a that can be movably installed relative to the first section slide rail 41 in the front-rear direction, and the locking member 5a is provided on the first storage rack 300, and a sliding matching structure 51 is provided between the locking member 5a and the swing arm 2, wherein the sliding matching structure 51 includes a matching slide groove and a sliding shaft that slide with each other, and the matching slide groove includes an arcuate groove section 5112, and the extension path of the arcuate groove section 5112 is at least partially adapted to the rotation of the sliding shaft, and the locking member 5a moves forward relative to the connecting member 3, and the corresponding sliding shaft can slide into the tail of the arcuate groove section 5112 to stop the swing arm 2 from swinging, so as to enable the first storage rack 300 to move from the top lifting limit position to the top locking position accordingly. In this way, the locking method is simpler and can be operated without adding additional mechanisms. The structure is simple, the operation is convenient, and the user experience is improved.

[0198] In some other embodiments, the mating groove includes an arcuate groove section 5112 and a horizontal groove section 5111, the extension path of the arcuate groove section 5112 is adapted to the rotation of the sliding shaft, the horizontal groove section 5111 is connected to the tail of the arcuate groove section 5112 and extends from front to rear, 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 to stop the swing arm 2 from swinging. 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 smoother, and it also conforms to the user's operating habits, thereby improving the user experience.

[0199] In some household appliances 1000, only one shelf is provided, some are provided with two, and some are provided with more. In the technical solution of the present utility model, please refer to Figure 16 and Figure 17A second rack 400 is further provided in the accommodating cavity 201. Corresponding to the top lifting limit position, the lower end of the first rack 300 protrudes upward from the lower end of the second rack 400. That is, at the lifting limit position of the first rack 300, the lifting height of the first rack 300 is higher than that of the second rack 400. At this time, the lifting height is larger, which reduces the frequency of users bending over and improves the user experience.

[0200] It should be noted that, in an embodiment in which there are two shelves in the household appliance 1000, the first shelf 300 is a lower shelf and the second shelf 400 is an upper shelf. When the first shelf 300 is in the top storage position and the second shelf 400 is in the accommodating cavity 201, the first shelf 300 is below the second shelf 400, and the two are arranged opposite to each other.

[0201] In view of some of the above embodiments, the user needs to alternately use the first rack 300 and the second rack 400. That is, when the first rack 300 is raised, the second rack 400 should be kept in the accommodating cavity 201 as much as possible; when the second rack 400 is used, the first rack 300 should be kept in the accommodating cavity 201 as much as possible, or the second rack 400 should not be raised as much as possible.

[0202] Of course, with respect to the upper end of the first rack 300 and the upper end of the second rack 400, in some embodiments, corresponding to the top lifting limit position and the top lifting locking position of the first rack 300, the upper end of the first rack 300 protrudes upward from the upper end of the second rack 400, that is, under the premise that the first rack 300 and the second rack 400 have the same depth, the first rack 300 can be located at a higher position.

[0203] In a product corresponding to the household appliance 1000 being a dishwasher, the first rack 300 corresponds to the lower basket of the dishwasher, and the second rack 400 corresponds to the upper basket of the dishwasher. When the lower basket of the dishwasher is in use, the lifting mechanism 100 lifts the lower basket of the dishwasher to a position higher than the upper basket. In this state, the operating height is the same as when the user uses the upper basket of the dishwasher, or a higher height, which provides a better user operating experience.

[0204] Regarding the installation position parameters of the fixed hinge point of the swing arm 2 in the receiving cavity 201 of the household appliance 1000, the higher the relative height of the installation position, the greater the height of the first shelf 300. Figure 10The household appliance 1000 is provided with a first rack 300 and a second rack 400 , and the second rack 400 is provided on the upper portion of the accommodating cavity 201 through a second guide rail 500 .

[0205] In the up-down direction, the rotation center of the first hinged mounting portion 21 is located between below the second guide rail 500 and a set position below the bottom of the second rack 400 , and the height difference between the set position and the bottom of the second rack 400 is L2, and 0≤L2≤10mm.

[0206] By arranging the first hinged mounting portion 21 at an 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.

[0207] Considering that the installation of the first hinged portion does not interfere with the movement of the second storage rack and the second guide rail 500, the upper installation position of the first hinged mounting portion 21 cannot exceed the second guide rail 500 at its highest position, nor can the lowest position be too low, otherwise the purpose of raising the first storage rack 300 to a maximum height is achieved. Therefore, in the embodiment of the present invention, setting the set position to between 0 mm and 10 mm below the bottom of the second storage rack 400 is a relatively reasonable value.

[0208] It should be noted that the drop value L2 can be an integer value from 0mm to 10mm, such as 1mm, 2mm, 3mm, 4mm, 5m, 6mm, 7mm, 8mm, 9mm, 10mm, etc. Of course, it can also be a value between any two of the above integers. For example, the value between 1mm and 2mm can be 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, etc., and so on.

[0209] It can be understood that, as the value of the drop value L2 increases, the first hinged mounting portion 21 is positioned lower, the relative height of the first storage rack 300 at the top lifting limit position decreases, and when the first storage rack 300 is lifted to the top limit position, the probability of interference with the second storage rack 400 decreases. The further the fixed arm 1 is from the second guide rail 500, the more flexible the placement of the fixed arm 1 becomes.

[0210] When the height difference L2 is 10 mm, that is, the rotation center of the first hinged mounting portion 21 is 10 mm below the bottom of the second rack 400, the height of the first rack 300 decreases less when it is lifted. At the top limit position, the first rack 300 is further away from the second rack 400, which reduces the risk of interference between the first rack 300 and the second rack 400. The fixed arm 1 is farther away from the second guide rail 500, and the position of the fixed arm 1 is more flexible.

[0211] When the drop value L2 is 0 mm, that is, the rotation center of the first hinged mounting portion 21 is below the bottom of the second storage rack 400, at this time, a portion of the upper end of the swing arm 2 overlaps with the left-right projection of the second storage rack 400. This arrangement saves space in the inner cavity of the housing 200 of the household appliance 1000 and makes the structure more compact.

[0212] It should be noted that in Figure 10 The positional relationship between the swing arm 2 and the second storage rack 400 is shown in FIG. 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 a plane reference schematic line of the lower end surface of the second guide rail 500; the second plane reference line e is a plane reference schematic line of the lower end surface of the second rack 400; the first plane reference line c is a plane schematic line corresponding to a reference plane that is parallel to the lower end surface of the second rack 400 and is offset downward by a distance L2. Figure 10 It can be seen that the position corresponding to the first plane reference line c is the reference line parallel to the bottom of the second storage rack 400 corresponding to the set position described in the present invention. Therefore, the first hinged installation 21 is limited to the area between the first plane reference line c and the second plane reference line d in the up and down directions.

[0213] The closer the first hinged mounting portion 21 is to the opening of the accommodating cavity 201, the longer the swing arm 2 is swung out of the accommodating cavity 201, and thus the greater the height that can be lifted. In some embodiments, see Figure 7 and Figure 8 The front end face of the shell 200 is provided with a front opening connected to the accommodating cavity 201, and the horizontal distance between the rotation center of the first hinged mounting portion 21 and the front end face of the shell 200 is L3, and 30mm≤L3≤120mm.

[0214] Considering that a door body is provided at the opening to be able to close the door body, a minimum horizontal distance of 30 mm from the rotation center of the first hinged mounting portion 21 to the front end surface of the shell 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-to-back direction without interference, a minimum horizontal distance of 120 mm from the rotation center of the first hinged mounting portion 21 to the front end surface of the shell 200 is a relatively reasonable value.

[0215] It should be noted that the horizontal distance L3 can be an integer value from 30mm to 120mm, such as 40mm, 50mm, 60mm, 70mm, 80m, 90mm, 100mm, 110mm, etc. Of course, it can also be a value between any two of the above integers. For example, the value between 30mm and 40mm can be 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, etc., and so on.

[0216] It can be understood that, the larger the value of L3, the further back the first hinged mounting portion 21 is located, that is, the further away from the opening of the accommodating cavity 201. When the swing arm 2 is in the upper swing limit position, the smaller the distance between the first shelf 300 and the second shelf 400 is, and the height to which the first shelf 300 can be lifted is smaller, which is not conducive to the arrangement and operation of other structures of the household appliance 1000, such as the arrangement of the door body, and the opening and closing of the door body.

[0217] The smaller the value of L3, the more forward the first hinged mounting portion 21 is positioned, that is, closer to the opening of the accommodating cavity 201. When the swing arm 2 is at the upper swing limit position, the distance between the first shelf 300 and the second shelf 400 is larger, and the height to which the first shelf 300 can be lifted is greater, which is beneficial to the arrangement and operation of other structures of the household appliance 1000, such as the arrangement of the door body, and also facilitates the opening and closing of the door body.

[0218] When the value of L3 is at the limit value of 120 mm, the first hinged mounting portion 21 is located at the rear limit position. At this position, the distance between the first shelf 300 and the second shelf 400 is minimum. The first shelf 300 can be lifted to a suitable height, making it easy to arrange other structures in the household appliance 1000 and facilitating the opening and closing of the main body.

[0219] When the value of L3 is at the limit of 30 mm, the first hinged mounting portion 21 is located at the forward limit position. In this position, while the swing angle of the swing arm 2 remains unchanged, the distance between the first rack 300 and the second rack 400 increases significantly compared to when the value of L3 is 120 mm, allowing the first rack 300 to be lifted to a higher height. While the distance between the first rack 300 and the second rack 400 remains unchanged, the height of the first rack 300 increases significantly compared to when the value of L3 is 120 mm, allowing the first rack 300 to be lifted to a greater height, making it suitable for applications where the first rack 300 is lifted to a greater height.

[0220] In some embodiments, the value of L3 can be between 60 mm and 90 mm. When the value of L3 is 60 mm, under the premise that the swing angle of the swing arm 2 remains unchanged, the distance between the first rack 300 and the second rack 400 increases significantly compared to when the value of L3 is 120 mm, thereby reducing the risk of interference between the structures during movement, and the first rack 300 can be lifted to a higher height. Under the premise that the distance between the first rack 300 and the second rack 400 remains unchanged, the height of the first rack 300 increases moderately compared to when the value of L3 is 120 mm, and the first rack 300 is lifted to a greater height, which is suitable for application scenarios where the first rack 300 is lifted to a large height.

[0221] When the value of L3 is 90 mm, and the swing angle of the swing arm 2 remains unchanged, the increase in the distance between the first rack 300 and the second rack 400 is significantly moderate compared to when the value of L3 is 120 mm, thereby reducing the risk of interference between the structures during movement, and allowing the first rack 300 to be lifted to a higher height. When the distance between the first rack 300 and the second rack 400 remains unchanged, the height of the first rack 300 is significantly increased compared to when the value of L3 is 120 mm, and the first rack 300 is lifted to a greater height, making it suitable for applications where the first rack 300 is lifted to a large height.

[0222] In some preferred embodiments, when the value of L3 is around 75 mm, factors such as the lifting height of the first shelf 300, the risk of interference between the first shelf 300 and the second shelf 400 at the top lifting limit position, and the opening and closing of the door are taken into consideration. This configuration enables the first shelf 300 to achieve a greater lifting height, reduces the risk of interference between the first shelf 300 and the second shelf 400, and facilitates the opening and closing of the door, thereby improving the user experience.

[0223] The longer the swing arm 2 is, the larger the span of the first hinged mounting portion 21 and the second hinged mounting portion of the swing arm 2 in the vertical direction at the upper swing limit position is, and the greater the lifting height of the first storage rack 300 is at this time. However, the longer the swing arm 2 is, the more likely the first storage rack 300 is to interfere with the bottom of the accommodating cavity 201 when the swing arm 2 is at the lower swing limit position.

[0224] In some embodiments, see Figure 7 and Figure 9 The swing arm 2 has a swing limit position. Corresponding to the swing limit position, the distance between the second hinged mounting portion 22 and the bottom wall 2011 of the accommodating cavity 201 is L4, and 10mm≤L4≤60mm.

[0225] The minimum distance between the second hinged mounting portion 22 and the bottom wall 2011 of the accommodating cavity 201 is 10 mm, which fully utilizes the space of the accommodating cavity 201. At the same spatial height, the length of the swing arm 2 can be set longer. After the second hinged mounting portion 22 of the swing arm 2 is swung out of the accommodating cavity 201, the first storage rack 300 can be in a higher position, reducing the frequency of the user's bending over and improving the user experience.

[0226] The maximum distance between the second hinged mounting portion 22 and the bottom wall 2011 of the accommodating cavity 201 is 60 mm, so as to leave a certain gap at the bottom of the accommodating cavity 201 to facilitate the installation of other structures.

[0227] It should be noted that the L4 can be an integer value from 10mm to 60mm, such as 20mm, 30mm, 40mm, 50mm, etc. Of course, it can also be a value between any two of the above integers. For example, the value between 30mm and 40mm can be 31mm, 32mm, 33mm, 34mm, 35mm, 36mm, 37mm, 38mm, 39mm, etc., and so on.

[0228] It can be understood that, the larger the value of L4 is, the higher the position of the second articulated mounting part 22 is set at the lower hem limit position, the shorter the swing arm 2 needs to be set at the same height space, and the smaller the risk of the swing arm 2 interfering with the bottom of the accommodating cavity 201; conversely, the smaller the value of L4 is, the lower the position of the second articulated mounting part 22 is set at the lower hem limit position, the longer the swing arm 2 needs to be set at the same height space, and the greater the risk of the swing arm 2 interfering with the bottom of the accommodating cavity 201.

[0229] When the value of L4 is at the limit value of 10 mm, at the lower hem limit position, the distance between the position where the second hinged mounting portion 22 is set and the bottom of the accommodating cavity 201 is the smallest. The longer the length of the swing arm 2 can be set, the higher the height that the first storage rack 300 can be lifted. The first storage rack 300 can be located at a higher position, reducing the frequency of the user bending over and improving the user experience.

[0230] When the L4 value is at the limit value of 60 mm, at the lower hem limit position, the distance between the position where the second articulated mounting part 22 is set and the bottom of the accommodating cavity 201 is larger. Compared with when the L4 value is at the limit value of 10 mm, the height of the second articulated mounting part 22 is increased by about 50 mm. At this time, the distance between the second articulated mounting part 22 and the bottom of the accommodating cavity 201 is larger, and the risk of interference between the swing arm 2 and the bottom of the accommodating cavity 201 is very small.

[0231] In some preferred embodiments, when the value of L4 is around 35 mm, factors such as the lifting height of the first storage rack 300 and the risk of interference between the swing arm 2 and the bottom of the accommodating cavity 201 are taken into consideration. This enables the first storage rack 300 to obtain a larger lifting height, and the risk of interference between the swing arm 2 and the bottom of the accommodating cavity 201 is lower, thereby improving the user experience.

[0232] It should be noted that the installation position parameter L2 of the first hinged mounting part 21 at the top in the up-down direction within the accommodating cavity 201, the horizontal distance parameter L3 between the first hinged mounting part 21 and the front end surface of the shell (200), and the spacing parameter L4 between the second hinged mounting part 22 at the bottom and the bottom of the accommodating cavity 201 when the swing arm is at the lower swing limit position are interrelated and determine the setting length of the swing arm 2, the swing angle, the maximum height that the first storage rack 300 can be lifted, the interference between the first storage rack 300 and the second storage rack 400, the opening and closing of the door of the household appliance 1000, etc.

[0233] In some embodiments, when the L2 parameter is 10 mm, the L3 parameter is 75 mm, and the L4 parameter is 35 mm, the swing arm 2 can be set to an appropriate length. This configuration saves the layout space of the inner cavity of the shell 200 of the household appliance 1000, and the structure is more compact. The first shelf 300 can obtain a larger lifting height, and the swing arm 2 can occupy a reasonable space in the accommodating cavity 201. The risk of interference between the swing arm 2 and the bottom of the accommodating cavity 201 is low, and the risk of interference between the first shelf 300 and the second shelf 400 is low. The door body is also easy to open and close, which improves the user experience.

[0234] In an embodiment where two swing arms 2 are provided in the lifting mechanism 100 , the first hinged mounting portions 21 of the two swing arms 2 are hingedly mounted on the fixed arm 1 , and the second hinged mounting portions 22 of the two swing arms 2 are directly or indirectly mounted on the first storage rack 300 .

[0235] See also Figure 7 and Figure 9 Among the two first hinged mounting parts 21 of the two swing arms 2, the first hinged mounting part 21 located at the top and the front side is the first upper hinged mounting part, and the rotation center of the first upper hinged mounting part is located 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 in which two swing arms 2 are set, the first upper hinged mounting part located at the top is used as a reference and is set as close to the top as possible.

[0236] Each of the swing arms 2 has a lower swing limit position. Corresponding to the lower swing limit position, among the two second hinged mounting parts 22 of the two swing arms 2, the second hinged mounting part 22 at the bottom and at the rear side is the second lower hinged mounting part. The distance between the rotation center of the second lower hinged mounting part and the bottom wall 2011 of the accommodating cavity 201 is L5, and 10mm≤L5≤60mm, that is, in the embodiment of setting two swing arms 2, the second lower hinged mounting part set at the bottom is used as a reference and is set as low as possible.

[0237] Regarding the setting method and value of parameter L5, please refer to the setting method of parameter L4 mentioned above, which will not be repeated here.

[0238] The following describes the process of a user using the household appliance 1000 based on the relevant structure of the household appliance 1000, with the first rack 300 as a reference:

[0239] 1. The first storage rack 300 is in the bottom storage position, such as Figure 1-4 As shown:

[0240] This state is the state in which the user has not used it, has just started using it, or has finished using it. In these states, the first rack 300 is in the receiving cavity 201 of the household appliance 1000. Figures 1 to 4 It can be seen that the first storage rack 300 is retracted into the accommodating cavity 201 , at which time the distance between the first section slide rail 41 and the tail section slide rail 42 of the first guide rail 4 is the smallest or the overlapping distance is the largest, and the swing arm 2 is at the lower swing limit position.

[0241] 2. The first shelf 300 is at the bottom position to be lifted, such as Figure 5-13 As shown:

[0242] This state is when the user pulls out the first rack 300 from the accommodating cavity 201, or when the user lowers the first rack 300 after using the first rack 300. In these states, the first rack 300 is at the opening of the accommodating cavity 201. Figure 5-6 It can be seen that at this time, the distance between the first section slide rail 41 and the tail section slide rail 42 of the first guide rail 4 is relatively large or the overlapping distance is small, the first storage rack 300 moves forward a distance relative to the accommodating cavity 201, and the swing arm 2 is still at the lower swing limit position.

[0243] 3. The first storage rack 300 is at the top lifting limit position, such as Figure 14-22 As shown:

[0244] This state is when the user lifts the first rack 300, or when the user exits the locked state after using the first rack 300. In these states, the first rack 300 is at the maximum height of the lift. Figure 14-15 It can be seen that at this time, the distance between the first section slide rail 41 and the tail section slide rail 42 of the first guide rail 4 is relatively large or the overlapping distance is small, and the distance between the first shelf 300 at the bottom position to be lifted or the overlapping distance has not changed, and the swing arm 2 is at the upper swing limit position.

[0245] 4. The first storage rack 300 is in the top locking position, as shown in FIG. Figure 23-29 As shown:

[0246] This state is a locked state after the user lifts the first shelf 300. At this time, the user can take out and put down the items to be placed. In these states, the first shelf 300 is at the maximum height of the lift. Figure 23-24It can be seen that at this time, the distance between the first section slide rail 41 and the tail section slide rail 42 of the first guide rail 4 is the largest or the overlapping distance is the smallest, the first storage rack 300 moves forward a certain distance in the top locking position relative to the top lifting limit position, and the swing arm 2 is still in the upper swing limit position.

[0247] The following is an introduction to the complete user process:

[0248] When the user needs to use the household appliance 1000, the user first opens the door of the household appliance 1000, and then pulls the first shelf 300 forward from the bottom storage position out of the accommodating cavity 201 to the bottom lifting position; under the swinging action of the swing arm 2 of the lifting mechanism 100, the user continues to pull the first shelf 300 forward and upward, so that the first shelf 300 moves from the bottom lifting position to the top lifting limit position; the user continues to pull the first shelf 300 forward, and the first shelf 300 moves from the top lifting limit position to the top locking position. In the locked state, the user can take and place items to be placed in the first shelf 300 without bending over frequently.

[0249] When the user finishes taking or placing items to be placed, the user pushes the first rack 300 backward to unlock the first rack 300 and move it from the top unlocked position to the top lifting limit position; the user lowers the first rack 300 to move it from the top lifting limit position to the bottom position to be lifted; the user continues to push the first rack 300 backward to move it from the bottom position to be lifted to the bottom storage position. When the first rack 300 is in the bottom storage position, the user can close the door to complete the use of the household appliance 1000.

[0250] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A lifting mechanism for lifting a first shelf of a household appliance, so that the first shelf can be switched between a bottom position to be lifted and a top lifting limit position, characterized in that: The lifting mechanism includes a fixed arm and at least one swing arm, the fixed arm being mounted in the receiving cavity of the household appliance, and a first hinged mounting portion and a second hinged mounting portion being formed on the same swing arm, the first hinged mounting portion being mounted on the fixed arm, and the second hinged mounting portion being directly or indirectly mounted on the first shelf; The swing arm has an upper swing limit position, which is used to enable 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 back to front, the swing arm is tilted upward.

2. The lifting mechanism according to claim 1, wherein: Corresponding to the upper swing limit position, the angle between the line connecting the rotation centers of the first hinged mounting part and the second hinged mounting part on the same swing arm and the horizontal direction is α, and 0°<α≤70°.

3. The lifting mechanism according to claim 1, wherein: Corresponding to the upper swing limit position, the span of the rotation center of the first articulated mounting part and the second articulated mounting part on the same swing arm in the up-down direction is L1, and 0<L1≤235mm.

4. The lifting mechanism according to claim 1, wherein: The swing arm has a lower swing limit position corresponding to the bottom position of the first rack to be lifted, and the same swing arm has a swing angle limited between the upper swing limit position and the lower swing limit position, and the swing angle is set as an obtuse angle.

5. The lifting mechanism according to claim 4, wherein: The swing angle is β, and 90°<β≤160°.

6. The lifting mechanism according to claim 1, wherein: The lifting mechanism further includes a connecting member, the connecting member being used to directly or indirectly connect to the first storage rack of the household appliance; The second hinged mounting portion of at least one of the swing arms is mounted on the connecting member.

7. The lifting mechanism according to claim 6, wherein: The lifting mechanism also includes a first guide rail, which includes multiple sections of slide rails that are telescopically and slidably connected to each other. The multiple sections of the slide rails include at least a first section and a tail section. The first section is connected to the connector, and the tail section is used to connect to the first shelf of the household appliance, so that the first shelf can be switched between a bottom storage position and a bottom position to be lifted.

8. The lifting mechanism according to claim 1, wherein: The lifting mechanism further includes a locking structure, and the locking structure is used to prevent the swing arm and the first rack from rotating relative to each other after the first rack is lifted.

9. The lifting mechanism according to claim 8, wherein: The lifting mechanism further includes a connecting member, the second hinged mounting portion of at least one swing arm being mounted on the connecting member, the locking structure including a locking member that can be movably mounted relative to the connecting member in a front-to-rear direction, the locking member being used to be mounted on the first storage rack; A sliding fit structure is provided between the locking member and the swing arm. When the locking member moves in the front-to-back direction relative to the connecting member, the sliding fit structure slides and fits, so that the first storage rack can move from the top lifting limit position to the top locking position.

10. The lifting mechanism according to claim 9, wherein: The sliding fit structure comprises a fitting slide groove and a sliding shaft that are slidably fitted with each other; At least one of the matching sliding grooves includes an arcuate groove segment, and an extension path of the arcuate groove segment is at least partially adapted to the rotation of the sliding shaft; The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the tail of the arc-shaped slot section to prevent the swing arm from swinging.

11. The lifting mechanism according to claim 10, wherein: The inner side wall at the tail end of the arc-shaped slot section is provided with a clamping rib to limit the sliding shaft to be located within the arc-shaped slot section.

12. The lifting mechanism according to claim 9, wherein: The sliding fit structure comprises a fitting slide groove and a sliding shaft that are slidably fitted with each other; At least one of the matching sliding grooves includes an arcuate groove section and a horizontal groove section, the extension path of the arcuate groove section is adapted to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arcuate groove section and extends from front to rear; The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the horizontal groove section to prevent the swing arm from swinging.

13. The lifting mechanism according to claim 9, wherein: The sliding matching structures are provided in two groups, the sliding shafts of the two groups of sliding matching structures are both provided on the same swing arm, and the matching sliding grooves of the two groups of sliding matching structures are both provided on the locking member.

14. The lifting mechanism according to claim 13, wherein: The two sliding shafts in the two sets of sliding fitting structures include a first sliding shaft adjacent to the second hinged mounting portion, and a second sliding shaft away from the second hinged mounting portion; The two mating grooves in the two groups of sliding mating structures include a first mating groove set corresponding to the first sliding shaft, and a second mating groove set corresponding to the second sliding shaft. The inlet of the first mating groove is opened at the lower side end of the locking member, and the inlet of the second mating groove is opened at the front side end of the locking member.

15. The lifting mechanism according to claim 9, wherein: The lifting mechanism further includes a first guide rail, the first guide rail including a plurality of slide rails that are telescopically and slidably connected to each other, the plurality of slide rails including at least a first slide rail and a tail slide rail, the first slide rail being connected to the connecting member, and the tail slide rail being used to connect to the first storage rack of the household appliance; The tail section slide rail is fixedly installed relative to the locking member.

16. The lifting mechanism according to any one of claims 8 to 15, characterized in that: Two swing arms are provided, and the locking structure enables the two swing arms and the first storage rack to stop rotating synchronously.

17. The lifting mechanism according to any one of claims 1 to 15, characterized in that: Two swing arms are provided, and the lifting mechanism further includes a connecting piece. The second hinged mounting portions of the two swing arms are both hinged to the connecting piece, and the connecting piece is used to be connected to the first storage rack.

18. A household appliance, characterized in that: include: a housing, forming a receiving cavity; A lifting mechanism, comprising the lifting mechanism according to any one of claims 1 to 17, wherein the fixed arm of the lifting mechanism is provided on a side wall of the accommodating cavity; and a first storage rack, hingedly connected to the swing arm of the lifting mechanism; The lifting mechanism enables the first storage rack to switch between a bottom position to be lifted and a top lifting limit position.

19. The household appliance according to claim 18, characterized in that The lifting mechanism also includes a connecting member and a first guide rail, the second hinged mounting portion of the swing arm is connected to the connecting member, the first guide rail includes a plurality of slide rails that are telescopically and slidably connected to each other, the plurality of slide rails including at least a first slide rail and a tail slide rail, the first slide rail is connected to the connecting member, and the tail slide rail is used to connect to the first storage rack of the household appliance, so that the first storage rack can be pulled out from the bottom storage position to the bottom position to be lifted.

20. The household appliance according to claim 19, characterized in that The lifting mechanism also includes a locking structure, which includes a locking member that can be movably installed relative to the first slide rail in the front-rear direction. The locking member is provided on the first storage rack, and a sliding matching structure is provided between the locking member and the swing arm. The sliding matching structure includes a matching slide groove and a sliding shaft that slidably match each other, and the matching slide groove includes an arcuate groove section, and the extension path of the arcuate groove section is at least partially adapted to the rotation of the sliding shaft. The locking member moves forward relative to the connecting member, and the corresponding sliding shaft can slide into the tail of the arcuate groove section to stop the swing arm from swinging, so as to enable the first storage rack to move from the top lifting limit position to the top locking position.

21. The household appliance according to claim 19, wherein The lifting mechanism further includes a locking structure, the locking structure including a locking member that can be movably installed relative to the first slide rail in the front-rear direction, the locking member is provided on the first storage rack, a sliding matching structure is provided between the locking member and the swing arm, the sliding matching structure includes a matching slide groove and a sliding shaft that slidably match each other, the matching slide groove includes an arcuate groove section and a horizontal groove section, the extension path of the arcuate groove section is adapted to the rotation of the sliding shaft, and the horizontal groove section is connected to the tail of the arcuate groove section and extends from front to rear; 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 arm from swinging, so that the first storage rack can move from the top lifting limit position to the top locking position.

22. The household appliance according to claim 18, wherein A second shelf is further provided in the accommodating cavity. Corresponding to the top lifting limit position, the lower end of the first shelf protrudes upward from the lower end of the second shelf.

23. The household appliance according to claim 22, characterized in that The household appliance includes a dishwasher, the first rack is configured as a lower basket, and the second rack is configured as an upper basket.

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