Lifting mechanism and household appliance

Abstract

A lifting mechanism and a household appliance. The lifting mechanism (100) comprises a fixed arm (1) and two swing arms (2). Each swing arm (2) has a first hinge mounting part (21) and a second hinge mounting part (22). The first hinge mounting part (21) of each swing arm (2) is mounted on the fixed arm (1), and the second hinge mounting part (22) of each swing arm (2) is configured for being directly or indirectly mounted on a first shelving rack (300). The vertical drop between the two first hinge mounting parts (21) is greater than the horizontal span between the two first hinge mounting parts (21). At an upwards swing limit position, a connection line between the centers of rotation of the first hinge mounting part (21) and the second hinge mounting part (22) of the same swing arm (2) and a connection line between the centers of rotation of the second hinge mounting parts (22) of the two swing arms (2) form an included angle γ, the included angle γ being greater than or equal to 0° and less than 90°.

Description

Lifting mechanism and household appliance

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application Nos. 202410541707.7, 202420943980.8, 202420944026.0, 202420943936.7, filed on April 30, 2024, and 202411391837.3, 202422413156.4, 202422414507.3, filed on September 30, 2024, the contents of which are incorporated by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of household appliances, and in particular to a lifting mechanism and a household appliance. BACKGROUND

[0004] In a household appliance with an internal space, a movable storage structure such as a shelf is usually configured to be able to extend from the interior of the household appliance. Some movable storage structures in the prior art have a pull-out function and also have a lifting function.

[0005] In some household appliances, the shelf is usually placed at the bottom of the household appliance. During use, such as taking and placing tableware, the user needs to bend down frequently. In order to reduce the frequency of bending down during the use of the shelf, the lifting mechanism is used to lift the shelf for use, which can reduce the frequency of bending down. However, the existing lifting mechanism makes the lifting height of the shelf relatively low, and the user still needs to bend down frequently during use, which results in poor user experience. SUMMARY

[0006] The main purpose of the present application is to provide a lifting mechanism and a household appliance, which aims to optimize the existing lifting mechanism to reduce the frequency of bending down during operation and improve user experience. In the scheme of lifting the shelf of the household appliance to a large height, after the shelf is lifted to the top lifting limit position, the user takes and places the objects to be placed in the shelf. After the user finishes using, the shelf also needs to be returned to the interior of the household appliance. During the lifting and returning of the shelf, how to make the operation of the user more convenient and labor-saving determines the performance of the lifting mechanism, and the existing lifting mechanism needs to be optimized.

[0007] To achieve the above-mentioned purpose, the present application provides a lifting mechanism, which comprises:

[0008] a fixed arm; and

[0009] Two swing arms, two ends of each of the swing arms are correspondingly provided with a first hinged mounting part and a second hinged mounting part, each of the first hinged mounting parts is mounted to the fixed arm, each of the second hinged mounting parts is directly or indirectly mounted to the first shelf, each of the swing arms has an upper swing limit position and a lower swing limit position, the lower swing limit position is used to enable the first shelf to be in the bottom position to be lifted, the upper swing limit position is used to enable the first shelf to be in the top position to be lifted, a difference in height of the two first hinged mounting parts in the up-down direction is greater than a span of the two first hinged mounting parts in the front-rear direction;

[0010] At the upper swing limit position, an included angle between a line connecting the rotation centers of the first hinged mounting part and the second hinged mounting part on the same swing arm and a line connecting the rotation centers of the two second hinged mounting parts of the two swing arms is γ, and 0°≤γ<90°.

[0011] In an embodiment, 30°≤γ<90°.

[0012] In an embodiment, at the lower swing limit position, the two swing arms include a first swing arm at the rear side and a second swing arm at the front side, one end of the first swing arm provided with the first hinged mounting part is provided with an extension, and a third hinged mounting part is arranged on the extension.

[0013] The lifting mechanism further includes a damping member, one end of the damping member is connected to the third hinged mounting part, and the other end is hinged to the fixed arm.

[0014] In an embodiment, in the first swing arm, the rotation centers of the first hinged mounting part and the second hinged mounting part form a first line, the rotation centers of the first hinged mounting part and the third hinged mounting part form a second line, and an included angle between the first line and the second line is θ, and 95°≤θ≤180°.

[0015] In an embodiment, 95°≤θ≤165°.

[0016] In an embodiment, in the first swing arm, a distance between the third hinged mounting part and the first hinged mounting part is L6, and 20mm≤L6≤170mm.

[0017] In an embodiment, 20mm≤L6≤100mm.

[0018] In an embodiment, the damping member includes a gas strut.

[0019] In an embodiment, the two swing arms are staggered in the front-rear direction.

[0020] At the upper swing limit position, the projections of the rotation centers of the two first hinged mounting parts and the rotation centers of the two second hinged mounting parts in a vertical plane are arranged in a line.

[0021] In an embodiment, the two swing arms are arranged at least partially opposite in a front-rear direction.

[0022] At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other.

[0023] In an embodiment, the rotation centers of the first hinged mounting part and the second hinged mounting part of the same swing arm form a first connecting line.

[0024] The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, which is arranged in parallel with the first connecting line.

[0025] In an embodiment, the rotation centers of the first hinged mounting part and the second hinged mounting part of the same swing arm form a first connecting line, which is arranged in an up-down direction at the lower swing limit position.

[0026] In an embodiment, the opposite side surfaces of the two swing arms include a first side surface and a second side surface, the first side surface is provided with an abutting protrusion towards the second side surface, wherein:

[0027] At the lower swing limit position, the abutting protrusion avoids the second side surface; at the upper swing limit position, the abutting protrusion abuts against the second side surface; or,

[0028] At the lower swing limit position, the abutting protrusion abuts against the second side surface, at the upper swing limit position, the abutting protrusion avoids the second side surface.

[0029] In an embodiment, the two swing arms include a first swing arm at the rear side at the lower swing limit position, and a second swing arm at the front side;

[0030] The first side surface is located on the second swing arm;

[0031] The abutting protrusion is arranged at one end of the second swing arm provided with the first hinged mounting part.

[0032] In an embodiment, in the second swing arm, the rotation centers of the first hinged mounting part and the second hinged mounting part form a first connecting line;

[0033] The side surface of the abutting protrusion has a second side edge in the length direction of the second swing arm, which is arranged in parallel with the first connecting line.

[0034] In an embodiment, in the second swing arm, the distance between the rotation center of the second hinged mounting portion and the second side edge of the abutting protrusion is L7, and 10mm≤L7≤30mm.

[0035] In an embodiment, in the upper swing limit position, two swing arms are used to upwardly prop the first shelf, and in the rear-to-front direction, each swing arm is upwardly inclinedly arranged.

[0036] In an embodiment, corresponding to the upper swing limit position, the included 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°; and / or,

[0037] Corresponding to the upper swing limit position, the difference in the up-down direction between the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm is L1, and 0<L1≤235mm.

[0038] The application also proposes a household appliance, which comprises a shell, a lifting mechanism, and a first shelf, the shell is formed with an accommodating cavity, a fixed arm of the lifting mechanism is arranged on a side wall of the accommodating cavity, and the first shelf is directly or indirectly hinged to two swing arms of the lifting mechanism.

[0039] The lifting mechanism enables the first shelf to switch between a bottom standby lifting position and a top lifting limit position.

[0040] The lifting mechanism comprises:

[0041] a fixed arm; and

[0042] two swing arms, each swing arm is correspondingly provided with a first hinged mounting portion and a second hinged mounting portion at two ends, each first hinged mounting portion is mounted on the fixed arm, each second hinged mounting portion is directly or indirectly mounted on the first shelf, each swing arm has an upper swing limit position and a lower swing limit position, the lower swing limit position enables the first shelf to be in the bottom standby lifting position, the upper swing limit position enables the first shelf to be in the top lifting limit position, and the difference in the up-down direction between the two first hinged mounting portions is greater than the span of the two first hinged mounting portions in the front-rear direction.

[0043] In the upper swing limit position, the included 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 line connecting the rotation centers of the two second hinged mounting portions of the two swing arms is γ, and 0°≤γ<90°.

[0044] In an embodiment, a second shelf is further arranged in the accommodating cavity, and the lower end of the first shelf protrudes upwardly beyond the lower end of the second shelf when the first shelf is in the top limit position.

[0045] In an embodiment, the household appliance is a dishwasher, the first shelf is a lower basket, and the second shelf is an upper basket.

[0046] To achieve the above object, the application provides a lifting mechanism, which comprises:

[0047] a fixed arm, and

[0048] two swing arms, the two swing arms are arranged at least partially opposite to each other in the front-rear direction, each swing arm is provided with a first hinge mounting portion and a second hinge mounting portion at two ends thereof, each first hinge mounting portion is mounted to the fixed arm, and each second hinge mounting portion is mounted to the first shelf directly or indirectly, each swing arm has an upper swing limit position and a lower swing limit position, the lower swing limit position is used to enable the first shelf to be in the bottom lifting position, and the upper swing limit position is used to enable the first shelf to be in the top limit position;

[0049] In the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other.

[0050] In an embodiment, in the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other.

[0051] In an embodiment, the first hinge mounting portion and the second hinge mounting portion of the same swing arm are formed with a first connecting line at the rotation centers thereof.

[0052] The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, and the first side edge is arranged in parallel with the first connecting line.

[0053] In an embodiment, the first hinge mounting portion and the second hinge mounting portion of the same swing arm are formed with a first connecting line at the rotation centers thereof, and in the lower swing limit position, the first connecting line is arranged in extension in the up-down direction.

[0054] In an embodiment, the opposite side surfaces of the two swing arms include a first side surface and a second side surface, and the first side surface is provided with an abutting protrusion protruding toward the second side surface, wherein:

[0055] In the lower swing limit position, the abutting protrusion avoids the second side surface, and in the upper swing limit position, the abutting protrusion abuts against the second side surface; or

[0056] In the lower swing limit position, the abutting protrusion abuts against the second side surface, and in the upper swing limit position, the abutting protrusion avoids the second side surface.

[0057] In an embodiment, the two swing arms include a first swing arm at the rear side in the lower swing limit position, and a second swing arm at the front side.

[0058] The first side surface is located on the second swing arm.

[0059] The abutting protrusion is arranged at one end of the second swing arm provided with the first hinged mounting portion.

[0060] In an embodiment, in the second swing arm, the rotation centers of the first hinged mounting portion and the second hinged mounting portion form a first connecting line.

[0061] The side surface of the abutting protrusion has a second side edge in the length direction of the second swing arm, and the second side edge is arranged in parallel with the first connecting line.

[0062] In an embodiment, in the second swing arm, the distance between the rotation center of the second hinged mounting portion and the second side edge of the abutting protrusion is L7, and 10mm≤L7≤30mm.

[0063] In an embodiment, in the upper swing limit position, the two swing arms are used to upwardly support the first shelf, and in the rear-to-front direction, each swing arm is arranged to be upwardly inclined.

[0064] In an embodiment, in the upper swing limit position, the angle between the connecting line of 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°; and / or,

[0065] In the upper swing limit position, the difference in the up-and-down direction between the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm is L1, and 0<L1≤235mm.

[0066] In an embodiment, the same swing arm has a swing angle defined between the upper swing limit position and the lower swing limit position, and the swing angle is arranged to be obtuse.

[0067] In an embodiment, the swing angle is β, and 90°<β≤160°.

[0068] The application also provides a household appliance, which comprises a housing, a lifting mechanism and a first shelf, the housing is formed with a receiving cavity, a fixed arm of the lifting mechanism is arranged on a side wall of the receiving cavity, and the first shelf is directly or indirectly hinged to two swing arms of the lifting mechanism.

[0069] The lifting mechanism enables the first shelf to switch between a bottom standby lifting position and a top lifting limit position.

[0070] The lifting mechanism comprises:

[0071] a fixed arm, and

[0072] two swing arms, the two swing arms are arranged at least partially opposite to each other in the front-rear direction, two ends of each swing arm are correspondingly provided with a first hinged mounting part and a second hinged mounting part, the first hinged mounting part of each swing arm is mounted on the fixed arm, the second hinged mounting part of each swing arm is used for directly or indirectly mounting on the first shelf, and each swing arm has an upper swing limit position and a lower swing limit position, the lower swing limit position is used for enabling the first shelf to be in the bottom standby lifting position, and the upper swing limit position is used for enabling the first shelf to be in the top lifting limit position.

[0073] In the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms are in abutment.

[0074] In an embodiment, a second shelf is further arranged in the receiving cavity, and a lower end of the first shelf protrudes upwardly beyond a lower end of the second shelf at the top lifting limit position.

[0075] In an embodiment, the household appliance comprises a dishwasher, the first shelf is arranged as a lower basket, and the second shelf is arranged as an upper basket.

[0076] To achieve the above object, the application provides a lifting mechanism, which comprises:

[0077] a fixed arm, and

[0078] two swing arms, each swing arm has a first hinged mounting part and a second hinged mounting part, the first hinged mounting part of each swing arm is mounted on the fixed arm, and the second hinged mounting part of each swing arm is used for directly or indirectly mounting on the first shelf.

[0079] The swing arm has an upper swing limit position, so that the first shelf can be in the top lifting limit position, at which the angle between the line connecting the rotation centers of the first and second hinged mounting portions on the same swing arm and the line connecting the rotation centers of the two second hinged mounting portions of the two swing arms is γ, and 0°<γ<90°.

[0080] In an embodiment, 30°≤γ<90°.

[0081] In an embodiment, at the upper swing limit position, the two swing arms include a first swing arm below and a second swing arm above, and the first swing arm is provided with an extension at one end of the first hinged mounting portion, and a third hinged mounting portion is arranged on the extension.

[0082] The lifting mechanism further includes a damping member, one end of which is connected to the third hinged mounting portion, and the other end is hinged to the fixed arm.

[0083] In an embodiment, in the first swing arm, the rotation centers of the first and second hinged mounting portions form a first line, the rotation centers of the first and third hinged mounting portions form a second line, and the angle between the first and second lines is θ, and 95°≤θ≤180°.

[0084] In an embodiment, 95°≤θ≤165°.

[0085] In an embodiment, in the first swing arm, the distance between the third hinged mounting portion and the first hinged mounting portion is L6, and 20mm≤L6≤170mm.

[0086] In an embodiment, 20mm≤L6≤100mm.

[0087] In an embodiment, the damping member includes a gas strut.

[0088] In an embodiment, at the upper swing limit position, the swing arm is used to upwardly support the first shelf, and in the rear-to-front direction, the swing arm is upwardly inclined.

[0089] In an embodiment, corresponding to the upper swing limit position, the angle between the line connecting the rotation centers of the first and second hinged mounting portions on the same swing arm and the horizontal direction is α, and 0°<α≤70°; and / or,

[0090] Corresponding to the upper swing limit position, the difference in the up-down direction between the rotation centers of the first and second hinged mounting portions on the same swing arm is L1, and 0<L1≤235mm.

[0091] The application also provides a household appliance, which comprises a housing, a lifting mechanism and a first shelf, the housing is formed with a receiving cavity, a fixed arm of the lifting mechanism is arranged on a side wall of the receiving cavity, and the first shelf is directly or indirectly hinged to two swing arms of the lifting mechanism, and the lifting mechanism enables the first shelf to switch between a bottom to be lifted position and a top lifting limit position.

[0092] The lifting mechanism comprises:

[0093] a fixed arm; and

[0094] two swing arms, each of the swing arms is provided with a first hinged mounting portion and a second hinged mounting portion, the first hinged mounting portion of each of the swing arms is mounted on the fixed arm, and the second hinged mounting portion of each of the swing arms is directly or indirectly mounted on the first shelf;

[0095] The swing arms are provided with an upper swing limit position, so that the first shelf can be in the top lifting limit position, at the upper swing limit position, an included angle between a line connecting the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm and a line connecting the rotation centers of the two second hinged mounting portions of the two swing arms is γ, and 0°<γ<90°.

[0096] In an embodiment, a second shelf is further arranged in the receiving cavity, and a lower end of the first shelf protrudes upwardly from a lower end of the second shelf at the top lifting limit position.

[0097] In an embodiment, the household appliance comprises a dishwasher, the first shelf is arranged as a lower basket, and the second shelf is arranged as an upper basket. BRIEF DESCRIPTION OF DRAWINGS

[0098] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the drawings shown.

[0099] Fig. 1 is a perspective structural schematic view of an embodiment of the household appliance provided by the present application (the first shelf is in a bottom storage position, and the swing arms of the lifting mechanism are in a lower swing limit position);

[0100] Fig. 2 is a front structural schematic view of the household appliance in Fig. 1;

[0101] Fig. 3 is a perspective view of the household appliance of Fig. 1, showing the lifting mechanism and the first shelf;

[0102] Fig. 4 is a front view of the household appliance of Fig. 1, showing the lifting mechanism and the first shelf;

[0103] Fig. 5 is a perspective view of the household appliance of Fig. 1, showing the first shelf in a bottom, lowered position and the swing arm of the lifting mechanism in a lower swing limit position;

[0104] Fig. 6 is a front view of the household appliance of Fig. 5;

[0105] Fig. 7 is a perspective view of the household appliance of Fig. 5, showing the lifting mechanism and the first shelf;

[0106] Fig. 8 is a front view of the household appliance of Fig. 5, showing the lifting mechanism and the first shelf;

[0107] Fig. 9 is a partially cutaway view of the household appliance of Fig. 5, showing the lifting mechanism and the first shelf;

[0108] Fig. 10 is a front view of the lifting mechanism of Fig. 5, showing the fixed arm and the two swing arms;

[0109] Fig. 11 is a perspective view of the household appliance of Fig. 1, showing the first shelf in a top, raised limit position and the swing arm of the lifting mechanism in an upper swing limit position;

[0110] Fig. 12 is a front view of the household appliance of Fig. 11;

[0111] Fig. 13 is a perspective view of the household appliance of Fig. 11, showing the lifting mechanism and the first shelf;

[0112] Fig. 14 is a first front view of the household appliance of Fig. 11, showing the lifting mechanism and the first shelf;

[0113] Fig. 15 is a second front view of the household appliance of Fig. 11, showing the lifting mechanism and the first shelf;

[0114] Fig. 16 is a partially cutaway view of the household appliance of Fig. 11, showing the lifting mechanism and the first shelf;

[0115] Fig. 17 is a front view of the lifting mechanism of Fig. 11, showing the fixed arm and the two swing arms;

[0116] Fig. 18 is a front view of the lifting mechanism of Fig. 11, showing the two first hinge mounts and the two second hinge mounts with their centers of rotation collinear in a vertical plane;

[0117] Fig. 19 is a perspective view of the household appliance of Fig. 11, showing the lifting mechanism, the first shelf and the second shelf;

[0118] Fig. 20 is a front view of the structure of Fig. 11, showing the lifting mechanism, the first shelf and the second shelf;

[0119] Fig. 21 is a perspective view of the household appliance of Fig. 1 (the first shelf is in the top locking position, and the swing arm of the lifting mechanism is in the upper swing limit position);

[0120] Fig. 22 is a front view of the structure of Fig. 21;

[0121] Fig. 23 is a perspective view of the structure of Fig. 21, showing the lifting mechanism and the first shelf;

[0122] Fig. 24 is a front view of the structure of Fig. 21, showing the lifting mechanism and the first shelf;

[0123] Fig. 25 is a partial sectional view of the structure of Fig. 21, showing the lifting mechanism and the first shelf;

[0124] Fig. 26 is a view of the installation structure of the damping member and the swing arm of Fig. 21;

[0125] Fig. 27 is a view of the extension of different lengths and the damping member in the upper swing limit position;

[0126] Fig. 28 is a front view of an embodiment of the lifting mechanism of the present application (the swing arm is in the lower swing limit position);

[0127] Fig. 29 is a front view of the lifting mechanism of Fig. 28 (the swing arm is in the upper swing limit position);

[0128] Fig. 30 is a perspective view of an embodiment of the household appliance of Fig. 28 (the first shelf is in the bottom storage position, and the swing arm of the lifting mechanism is in the lower swing limit position);

[0129] Fig. 31 is a front view of the structure of Fig. 30;

[0130] Fig. 32 is a perspective view of the structure of Fig. 30, showing the lifting mechanism and the first shelf;

[0131] Fig. 33 is a front view of the structure of Fig. 30, showing the lifting mechanism and the first shelf;

[0132] Fig. 34 is a perspective view of the household appliance of Fig. 28 (the first shelf is in the bottom lifting position, and the swing arm of the lifting mechanism is in the lower swing limit position);

[0133] Fig. 35 is a front view of the structure of Fig. 34;

[0134] Fig. 36 is a perspective view of the household appliance of Fig. 34 with the lifting mechanism and the first shelf;

[0135] Fig. 37 is a front view of the household appliance of Fig. 34 with the lifting mechanism and the first shelf;

[0136] Fig. 38 is a partial cross-sectional view of the household appliance of Fig. 34 with the lifting mechanism and the first shelf;

[0137] Fig. 39 is a perspective view of the household appliance of Fig. 28 with the lifting mechanism (the first shelf is in the top, raised limit position and the swing arm of the lifting mechanism is in the upper swing limit position);

[0138] Fig. 40 is a front view of the household appliance of Fig. 39;

[0139] Fig. 41 is a perspective view of the household appliance of Fig. 39 with the lifting mechanism and the first shelf;

[0140] Fig. 42 is a front view of the household appliance of Fig. 39 with the lifting mechanism and the first shelf;

[0141] Fig. 43 is a partial cross-sectional view of the household appliance of Fig. 39 with the lifting mechanism and the first shelf;

[0142] Fig. 44 is a perspective view of the household appliance of Fig. 39 with the lifting mechanism, the first shelf and the second shelf;

[0143] Fig. 45 is a front view of the household appliance of Fig. 37 with the lifting mechanism, the first shelf and the second shelf;

[0144] Fig. 46 is a perspective view of the household appliance of Fig. 28 with the lifting mechanism (the first shelf is in the top, locked position and the swing arm of the lifting mechanism is in the upper swing limit position);

[0145] Fig. 47 is a front view of the household appliance of Fig. 46;

[0146] Fig. 48 is a perspective view of the household appliance of Fig. 46 with the lifting mechanism and the first shelf;

[0147] Fig. 49 is a front view of the household appliance of Fig. 46 with the lifting mechanism and the first shelf;

[0148] Fig. 50 is a partial cross-sectional view of the household appliance of Fig. 46 with the lifting mechanism and the first shelf;

[0149] Fig. 51 is a perspective view of an embodiment of the household appliance provided herein (the first shelf is in the bottom, stowed position and the swing arm of the lifting mechanism is in the lower swing limit position);

[0150] Fig. 52 is a front view of the household appliance of Fig. 51;

[0151] Fig. 53 is a perspective view of the household appliance of Fig. 51 including the lifting mechanism and the first shelf;

[0152] Fig. 54 is a front view of the household appliance of Fig. 51 including the lifting mechanism and the first shelf;

[0153] Fig. 55 is a perspective view of the household appliance of Fig. 51 (the first shelf is in the bottom, lowered position, and the swing arm of the lifting mechanism is in the lower swing limit position);

[0154] Fig. 56 is a front view of the household appliance of Fig. 51;

[0155] Fig. 57 is a perspective view of the household appliance of Fig. 51 including the lifting mechanism and the first shelf;

[0156] Fig. 58 is a front view of the household appliance of Fig. 51 including the lifting mechanism and the first shelf;

[0157] Fig. 59 is a partial cross-sectional view of the household appliance of Fig. 51 including the lifting mechanism and the first shelf;

[0158] Fig. 60 is a perspective view of the household appliance of Fig. 51 (the first shelf is in the top, raised limit position, and the swing arm of the lifting mechanism is in the upper swing limit position);

[0159] Fig. 61 is a front view of the household appliance of Fig. 60;

[0160] Fig. 62 is a perspective view of the household appliance of Fig. 60 including the lifting mechanism and the first shelf;

[0161] Fig. 63 is a first front view of the household appliance of Fig. 60 including the lifting mechanism and the first shelf;

[0162] Fig. 64 is a second front view of the household appliance of Fig. 60 including the lifting mechanism and the first shelf;

[0163] Fig. 65 is a partial cross-sectional view of the household appliance of Fig. 60 including the lifting mechanism and the first shelf;

[0164] Fig. 66 is a perspective view of the household appliance of Fig. 60 including the lifting mechanism, the first shelf, and the second shelf;

[0165] Fig. 67 is a front view of the household appliance of Fig. 60 including the lifting mechanism, the first shelf, and the second shelf;

[0166] Fig. 68 is a perspective view of the household appliance of Fig. 51 (the first shelf is in the top locking position and the swing arm of the lifting mechanism is in the upper swing limit position);

[0167] Fig. 69 is a front view of the household appliance of Fig. 68;

[0168] Fig. 70 is a perspective view of the lifting mechanism and the first shelf of Fig. 68;

[0169] Fig. 71 is a front view of the lifting mechanism and the first shelf of Fig. 68;

[0170] Fig. 72 is a partial sectional view of the lifting mechanism and the first shelf of Fig. 68;

[0171] Fig. 73 is an installation view of the damping member and the swing arm of Fig. 68;

[0172] Fig. 74 is a view of the damping member and the extension of different lengths in the upper swing limit position.

[0173] Brief Description of the Drawings: 100, lifting mechanism; 1, fixed arm; 2, swing arm; 2a, first swing arm; 2b, second swing arm; 21, first hinged mounting portion; 22, second hinged mounting portion; 23, third hinged mounting portion; 24, extension; 25, abutting protrusion; 26, first connecting line; 27, first side edge; 28, first side surface; 29, second side surface; 30, second side edge; 3, connecting member; 4, first guide rail; 41, first section of slide rail; 42, second section of slide rail; 5, locking structure; 5a, locking member; 511, first mating slide groove; 5111, horizontal groove section; 5112, arcuate groove section; 512, second mating slide groove; 513, first sliding shaft; 514, second sliding shaft; 6, damping member; 1000, household appliance; 200, housing; 201, accommodating cavity; 300, first shelf; 400, second shelf;

[0174] The implementation function features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0175] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0176] It should be noted that if the embodiments of the present application involve directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directionality indication also changes accordingly.

[0177] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of a person skilled in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0178] In a household appliance with an internal space, a movable storage structure such as a shelf can be configured to extend from the inside of the household appliance. Some movable storage structures in the prior art have a pull-out function and also have a lifting function.

[0179] In some household appliances, the shelf is usually placed at the bottom of the household appliance. During use, such as taking and placing tableware, frequent bending is required. In order to reduce the frequency of bending during the use of the shelf, the lifting mechanism is used to lift the shelf for use in the prior art, which can reduce the frequency of bending. However, the existing lifting mechanism makes the lifting height of the shelf relatively low, and the user still needs to bend frequently during use, which reduces the user experience.

[0180] In view of this, the present application provides a household appliance which can lift the shelf to a relatively high height, thereby reducing the frequent bending of the user during operation and improving the user experience. FIGS. 1-24 are structural schematic diagrams of the household appliance provided by the present application.

[0181] Please refer to FIGS. 1-2, the present application provides a household appliance 1000, which can be a dishwasher, an oven, an oven, a refrigerator, etc. The household appliance 1000 comprises a shell 200, the shell 200 is formed with a containing cavity 201, a first shelf 300 is connected in the containing cavity 201 through a lifting mechanism 100, and utensils to be placed, such as bowls, dishes, plates, chopsticks, knives and forks, etc. tableware, and also can be baked food or cold storage goods, etc.

[0182] In this application, the user is used as a reference direction, forward means the direction towards the user, or the side of the household appliance 1000 provided with a door body; backward means the opposite direction of the forward direction, specifically the direction away from the user, and the up-down direction means the direction with gravity as the reference.

[0183] It should be noted that there is only one shelf in some household appliances 1000, such as the first shelf 300. There are also multiple shelves, and in the embodiment of the household appliance 1000 provided with multiple shelves, two shelves can be provided, such as the first shelf 300 and the second shelf 400. When the two shelves have an up-down positional relationship, they can be referred to as an upper shelf and a lower shelf. In the description of the embodiment of this application, the first shelf 300 corresponds to the lower shelf, and the second shelf 400 corresponds to the upper shelf.

[0184] For the first shelf 300, the first shelf 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 to a suitable position. Specifically, after the door body of the household appliance 1000 is opened, the user needs to put or take out the items to be placed in the first shelf 300, and the user often pulls the first shelf 300 forward. During the movement of the first shelf 300, a combined movement process occurs, that is, the first shelf 300 moves forward and upward at the same time. At this time, the lifting mechanism 100 moves and supports the first shelf 300.

[0185] The first shelf 300 has several important positions during its movement, such as the bottom storage position (as shown in FIGS. 1 and 2), the bottom to be lifted position (as shown in FIGS. 5 and 6), the top lifting limit position (as shown in FIGS. 11 and 12), and the top locking position (as shown in FIGS. 20 and 21).

[0186] In an embodiment, the first shelf 300 can have only two positions, such as the bottom to be lifted position and the top lifting limit position. The first shelf 300 can also have three positions, such as the bottom storage position, the bottom to be lifted position, and the top lifting limit position. At this time, the top lifting limit position and the top locking position of the first shelf 300 can be the same position. The first shelf 300 can also have four positions, such as the bottom storage position, the bottom to be lifted position, the top lifting limit position, and the top locking position. At this time, the top lifting limit position and the top locking position of the first shelf 300 are different positions.

[0187] For the lifting mechanism 100, the lifting mechanism 100 mainly realizes the lifting of the first shelf 300, and the action of the lifting mechanism 100 can only correspond to the bottom position to be lifted and the top limit position of the first shelf 300.

[0188] The lifting mechanism 100 in the household appliance 1000 usually adopts a connecting rod mechanism, that is, the lifting of the first shelf 300 is realized by a single connecting rod or a combination of several connecting rods. In the embodiment with only one connecting rod, the connecting rod can be provided as a swing arm 2, two ends of the swing arm 2 are respectively formed with a first hinged mounting portion 21 and a second hinged mounting portion 22, the first hinged mounting portion 21 is hinged in the accommodating cavity 201 of the housing 200 of the household appliance 1000, and the second hinged mounting portion 22 is directly or indirectly connected to the first shelf 300. In addition, other support structures can be used to support the swing of the swing arm 2, and of course, a plurality of connecting rod mechanisms can also be provided on both sides of the first shelf 300, that is, two swing arms 2 are provided on both sides of the first shelf 300 to realize the swing, so that the single swing arm 2 can lift the first shelf 300 in the swing stroke.

[0189] In the combination of a plurality of connecting rods, a four-connecting-rod mechanism is usually used, and in the four-connecting-rod mechanism, two of the connecting rods can be provided as swing arms 2, that is, the lifting of the first shelf 300 is realized by the form of double swing arms 2, so that the stability of the first shelf 300 in the lifting process is better, which will be described in detail in subsequent embodiments.

[0190] Therefore, corresponding to the swing arm 2, the swing arm 2 has a lower limit position and an upper limit position, when the first shelf 300 only has two positions of the bottom position to be lifted and the top limit position of lifting, the first shelf 300 corresponding to the swing arm 2 at the lower limit position is at the bottom position to be lifted, and the first shelf 300 corresponding to the swing arm 2 at the upper limit position is at the top limit position of lifting.

[0191] When the first shelf 300 has three positions of the bottom storage position, the bottom position to be lifted and the top limit position of lifting, the first shelf 300 corresponding to the swing arm 2 at the lower limit position is at the bottom storage position and the bottom position to be lifted, and the first shelf 300 corresponding to the swing arm 2 at the upper limit position is at the top limit position of lifting.

[0192] When the first shelf 300 has four positions of a bottom storage position, a bottom to-be-lifted position, a top lifting limit position and a top locking position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position and the bottom to-be-lifted position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position and the top locking position.

[0193] It should be noted that the first hinged mounting portion 21 of the swing arm 2 is a fixed hinged point, and its position does not change. The swing movement of the swing arm 2 only indicates the movement of the movable hinged 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 referenced to 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, and 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.

[0194] In the scheme for achieving large-height lifting of the shelf of the household appliance 1000, after the shelf is lifted to the top lifting limit position, the user takes and places the to-be-stored articles in the shelf, and after the user finishes using, the shelf also needs to be returned to the inside of the household appliance 1000. In the lifting and returning process of the shelf, it is necessary to make the operation of the user more convenient and labor-saving to determine the performance of the lifting mechanism 100.

[0195] In the swing process of the two swing arms 2 of the lifting mechanism, the span between the two first hinged mounting portions 21 in the front-rear direction at the lower swing limit position determines the interference condition of the two swing arms 2, and the difference between the two first hinged mounting portions 21 in the up-down direction determines the interference condition of the two swing arms 2 when the swing arms 2 swing to the upper swing limit position.

[0196] In some existing technical schemes, the difference between the two first hinged mounting portions 21 in the up-down direction is often less than or equal to the span of the two first hinged mounting portions 21 in the front-rear direction. In this way, at the upper swing limit position of the two swing arms 2, the two swing arms 2 are only in a horizontal state, and in this state, the two swing arms 2 interfere with each other and cannot continue to swing upward.

[0197] In some embodiments, referring to FIG. 10 and FIG. 15, two swing arms 2 in the lifting mechanism 100 are provided, and the swing arms 2 have an upper swing limit position to enable the first shelf 300 to be in the top lifting limit position, and the fall of the two first hinge mounting portions 21 in the up-down direction is greater than the span of the two first hinge mounting portions 21 in the front-back direction.

[0198] In this way, during the swinging of the swing arms 2, the two swing arms 2 swing from the up-down direction state to a position beyond the horizontal state, and then continue to swing upward. In this process, the two swing arms 2 do not interfere with each other.

[0199] It should be noted that the fall of the two first hinge mounting portions 21 in the up-down direction corresponds to the La parameter in FIG. 10, and the span of the two first hinge mounting portions 21 in the front-back direction corresponds to the Lb parameter in FIG. 10. In the figure, it is shown that Lb<La.

[0200] Meanwhile, at the upper swing limit position, the angle between the line connecting the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 and the line connecting the rotation centers of the two second hinge mounting portions 22 of the two swing arms 2 is γ, and 0°≤γ<90°.

[0201] In the technical solution of the present application, at the upper swing limit position, the angle between the line connecting the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 and the line connecting the rotation centers of the two second hinge mounting portions 22 of the two swing arms 2 is γ, and 0°≤γ<90°. In this way, on the premise of considering the maximum height at which the first shelf 300 can swing, the user operation is more convenient and labor-saving, and the user experience is improved.

[0202] The greater the angle between the swing arm 2 and the horizontal direction, the smaller the angle γ, and at this time, the user needs to press the first shelf 300 to make it fall more strongly. The smaller the angle between the swing arm 2 and the horizontal direction, the greater the angle γ, and at this time, the user needs to press the first shelf 300 to make it fall less strongly, and the customer experience is more comfortable.

[0203] When the two swing arms 2 are in the coinciding limit position, the swing arm 2 can swing to the angle extreme value, and in this extreme case, the angle γ is 0. When the two swing arms 2 are in the horizontal direction state, the angle γ is 90°. Considering the swinging angle of the swing arm 2 and the strength with which the user needs to press the first shelf 300 to make it fall, it is a reasonable choice to set the angle γ between 0° and 90°.

[0204] It should be noted that the included angle γ can be any integer value between 0° and 90°, such as 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc. Of course, it can also be an angle value between any two of the above integers, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc. between 0° and 10°, between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°, between 60° and 70°, between 80° and 90°, and of course some decimal degree values. The above values are within the scope of the present application.

[0205] In some embodiments, the included angle γ is set between 30° and 90°, such as 30°, 90°, or any integer value between 30° and 90°. In some embodiments, the included angle γ is set between 30° and 60°, such as 30°, 60°, or any integer value between 30° and 60°.

[0206] The following is explained in terms of the γ angle value, the lifting height of the first shelf 300, and the force required to drop and play back the first shelf 300. The γ angle value of 90° is taken as a reference example.

[0207] When the included angle γ is set to 30°, the angle of the γ angle is reduced by 60° relative to the reference example, the force arm of the force applied to drop and play back the first shelf 300 is reduced by about 0.3 times, the force arm of the force applied is significantly reduced, and the first shelf 300 is directly lifted from the horizontal state to the inclined upward state. When the γ angle value is 30°, the lifting of the first shelf 300 is considered. In this embodiment, the swing angle of the swing arm 2 is large, which can make the first shelf 300 have a large lifting height.

[0208] When the included angle γ is set to 60°, the angle of the γ angle is reduced by 30° relative to the reference example, the force arm of the force applied to drop and play back the first shelf 300 is reduced by about 0.1 times, the force arm of the force applied is reduced less, and the force required to drop and play back the first shelf 300 is considered. In this embodiment, the first shelf 300 can be lifted to an appropriate height position, the force required by the user to drop and play back the first shelf 300 is small, the household appliance 1000 is easier and more convenient to operate, and the user experience is improved.

[0209] In some preferable embodiments, when the γ angle is around 45°, the angle is reduced by 45° compared to the reference example, the maximum height of the first shelf 300 is moderate, the force arm of the user pressing the first shelf 300 is reduced by about 0.2 times, the force arm is moderate, and the lifting height of the first shelf 300 and the force required for the first shelf 300 to fall back are considered.

[0210] In the process of lifting the first shelf 300, in order to improve the user's experience during the lifting of the shelf, a damping member 6 is generally provided, which can stretch and contract itself, thereby converting potential energy into kinetic energy during the lifting of the first shelf 300, achieving the effect of saving labor.

[0211] In some embodiments, at the upper swing limit position, the two swing arms 2 include a first swing arm 2a below and a second swing arm 2b above, one end of the first swing arm 2a provided with the first hinged mounting portion 21 is provided with an extension portion 24, and the third hinged mounting portion 23 is arranged on the extension portion 24.

[0212] The lifting mechanism 100 further comprises a damping member 6, one end of which is connected to the third hinged mounting portion 23, and the other end is hinged to the fixed arm 1.

[0213] By arranging the damping member 6 between the first swing arm 2a and the fixed arm 1, the kinetic energy of the first shelf 300 during lifting is converted into potential energy of the damping member 6, the user is more labor-saving during operation, and the user experience is improved.

[0214] It should be noted that the specific implementation form of the damping member 6 is not limited, which can be air support, compression spring, etc.

[0215] The length of the extension portion 24 and the included angle between the extension portion 24 and the first swing arm 2a determine the setting position of the third hinged mounting portion 23, and further determine the labor-saving characteristics of the entire lifting mechanism 100.

[0216] In some embodiments considering the element of the included angle between the extension portion 24 and the first swing arm 2a, please refer to FIG. 15, in the first swing arm 2a, the rotation centers of the first hinged mounting portion 21 and the second hinged mounting portion 22 form a first line, the rotation centers of the first hinged mounting portion 21 and the third hinged mounting portion 23 form a second line, the included angle between the first line and the second line is θ, and 95°≤θ≤180°.

[0217] By limiting the included angle θ between 95° and 180°, the extension 24 of the first swing arm 2a can be closer to the connecting point of the fixed arm 1 and the damping member 6 when the first swing arm 2a is at the upper swing limit position, so that the length of the damping part is shorter, thereby providing greater support force and improving the long-term reliability of the damping member 6.

[0218] It should be noted that the included angle θ can be any integer value between 95° and 180°, such as 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. Of course, it can also be an angle value between any two of the above integers, such as between 95° and 100°, which can be 96°, 97°, 98°, 99°, etc. It can also be between 10° and 20°, between 100° and 110°, between 110° and 120°, between 120° and 130°, between 130° and 140°, between 140° and 150°, between 150° and 160°, between 160° and 170°, between 170° and 180°, and of course it can also be a decimal value. The above values are within the scope of the present application.

[0219] The existing included angle θ between the first line and the second line is generally set to 90°. By increasing the setting value of the included angle θ, the first hinge mounting portion 21 of the swing arm 2 can be closer to the damping member 6 when the swing arm 2 is at the upper swing limit position, thereby reducing the length of the damping member 6 and providing greater support force and improving its long-term reliability.

[0220] The included angle θ between the first line and the second line cannot be too large. When θ is greater than 180°, increasing θ will increase the length of the damping member 6. Therefore, the included angle θ is set to be within 180° to avoid the length of the damping member 6 being too long.

[0221] The range of values of θ will be further described in combination with the embodiments of the present application as follows:

[0222] In an embodiment of the present application, 95°≤θ≤165°. The selection of "95°≤θ≤165°" is based on the following considerations for further optimization, which will be described in detail as follows.

[0223] Based on the above embodiment of 95°≤θ≤165°, the following refined embodiments exist;

[0224] The first detailed embodiment: 95°≤θ<136°, for example, 95°, 100°, 110°, etc. At this time, the length of the damping member 6 is smaller than the length of the existing damping member when the swing arm 2 is in the upper swing limit position, so that a greater supporting force can be provided, and the first shelf 300 is lifted higher. The length of the damping member 6 is also relatively long at this time, and the supporting force that can be provided is limited, and the stability of the first shelf 300 supported is not particularly good.

[0225] The second detailed embodiment: 165°≥θ≥136°. Without changing the selection of the damping member 6, even if the height of the first shelf 300 at the upper swing limit position is raised, the angle θ is greater than or equal to 136°, which can make the length of the damping member 6 shorter, provide sufficient supporting force, and enable the first shelf 300 to be better supported.

[0226] The third detailed embodiment: 145°<θ≤165°, for example, 146°, 150°, 155°, etc. At this time, the length of the damping member 6 is much larger than the length of the existing damping member when the swing arm 2 is in the upper swing limit position, so that a greater supporting force can be provided, and the first shelf 300 is supported stably. The damping member 6 occupies more space and is prone to interference between other components.

[0227] The fourth detailed embodiment: 95°≤θ≤145°. The damping member 6 occupies less space upward, and the probability of interference between the swing arm 2 and other components during upward swinging is reduced.

[0228] The fifth detailed embodiment: 136°≤θ≤145°. At this time, θ is much greater than 90°, and the length of the damping member can be greatly reduced when the swing arm 2 is in the upper swing limit position, so that it can provide a greater supporting force, and θ≤145° avoids the damping member 6 occupying too much space upward, and avoids interference between the swing arm 2 and other components during upward swinging.

[0229] In some embodiments, the included angle θ is limited to between 95° and 160°. In this way, the damping member 6 can play a good auxiliary role during the lifting or falling of the first shelf 300, so that the structure of the lifting mechanism 100 is more optimized, the user is more convenient during use of the first shelf 300, and the user experience is improved.

[0230] In some embodiments in which the length of the extension 24 is considered, please refer to Fig. 15, the distance between the third hinged mounting portion 23 and the first hinged mounting portion 21 in the first swing arm 2a is L6, 20mm≤L6≤170mm.

[0231] By setting the distance L6 to a value between 20mm and 170mm, when the first swing arm 2a is at the position in which the extension 24 is collinear with the damper 6, the length of the extension 24 is reduced, the length of the damper 6 is increased, the maximum compression amount of the damper 6 is reduced, the service life and long-term stability of the damper 6 are ensured, and under the premise that other conditions remain unchanged, when the first swing arm 2a is at the upper swing limit position, the length of the damper 6 is increased, and the damper 6 can provide greater support force.

[0232] When the distance between the third hinged mounting portion 23 and the first hinged mounting portion 21 is greater than 170mm, on the one hand, the length of the damper 6 is small, the support force provided is small, and when the first hinged mounting portion 21, the third hinged mounting portion 23, and the fourth hinged mounting portion are collinear, the compression amount of the damper 6 is too large. On the other hand, the distance between the first shelf 300 and the second shelf 400 is limited, and the stroke of the damper 6 cannot be considered both the maximum stroke and the minimum stroke.

[0233] It should be noted that the distance L6 can be any integer value between 20mm and 170mm, such as 20mm, 50mm, 80mm, 110mm, 140mm, 170mm, etc. Of course, it can also be a value between any two of the above integers, such as a value between 20mm and 50mm, which can be 30mm, 40mm, etc. It can also be a value between 30mm and 40mm, a value between 40mm and 50mm, a value between 50mm and 60mm, etc. Of course, it can also be a decimal value. The above values are within the scope of the present application.

[0234] In some embodiments, the distance L6 is set to a value between 20mm and 100mm, and at this time, L6 is less than or equal to 100mm. When the first swing arm 2a is at the upper swing limit position, the length of the damper 6 can be made smaller, the compression amount is larger, the support force provided is greater, and the effect of stopping the first swing arm 2a from swinging downward at the upper swing limit position is ensured.

[0235] The movement track of the third hinged mounting portion 23 of the extension portion 24 is a circumferential swing with the first hinged mounting portion 21 as the center. When a tangential force is applied to the extension portion 24, the extension portion 24 can be better driven to rotate or stop, and thus, when the swing arm 2 is at the upper swing limit position, the damping member 6 stops the swing arm 2 by the force output by itself, and correspondingly, the force of the damping member 6 on the extension portion 24 of the swing arm 2 is decomposed into two components, one of which is in the extension direction of the extension portion 24, and the other is in the direction perpendicular to the extension direction of the extension portion 24, and the size of the other component determines the acceleration of the extension portion 24, thereby achieving the rotation or stop of the extension portion 24.

[0236] In order to better stop the swing arm 2, referring to FIGS. 26 and 27, the included angle x between the damping member 6 and the extension portion 24 of the swing arm 2 is 80°≤x≤100°, and when the included angle x is less than 80° or greater than 100°, the force of the damping member 6 on the extension portion 24 of the swing arm 2 has a larger component in the extension direction of the extension portion 24 and a smaller component in the direction perpendicular to the extension direction of the extension portion 24, and the stopping effect on the swing arm 2 at the upper swing limit position is poor. Preferably, x is 90°, at which time the component in the extension direction of the extension portion 24 is 0, and the stopping effect is best.

[0237] When L6 is 100 mm, and other conditions remain unchanged, the value of X is about 75°, which is greater than the existing angle, and at this time, X is closer to 90° than the existing scheme, so that the tangential component of the damping member 6 is greater, and the support effect on the first shelf 300 at the upper limit position is better.

[0238] Based on the above 20mm≤L6≤100mm, the following sub-embodiments exist:

[0239] The first sub-embodiment: 70mm<L6≤100mm, when L6 is 70 mm, the corresponding X is about 80°, and at this time, 75°≤X<80°, at which time the length of the damping member 6 is shorter than the existing one when the swing arm 2 is at the upper swing limit position, the damping member 6 can output a greater force, and the included angle X is greater than the existing one and closer to 90°, correspondingly, the tangential component of the damping member 6 is greater, and the component in the extension direction of the extension portion 24 is smaller, and the stopping effect on the swing arm 2 is better than the existing scheme.

[0240] Second subdivision embodiment: 20mm≤L6≤70mm, at this time, corresponding to 80°≤X≤100°, when L6 is 20mm, the corresponding X is about 100°, when L6 is 70mm, the corresponding X is about 80°, at this time, compared with the first subdivision embodiment, X is closer to 90°, the component 6 has a larger tangential force and a smaller force in the extension direction of the extension 24, and the rotation stopping effect on the swing arm 2 is better than that of the first subdivision embodiment.

[0241] More specifically, when X is 90°, the length of the component 6 is the shortest at the upper swing limit position, and the tangential force is the largest, at this time, the rotation stopping effect on the swing arm is the best, and through numerous experiments, it is found that when L6 is 48mm, X can be approximately 90°, at this time, the rotation stopping effect on the swing arm is the best.

[0242] In the embodiment in which two swing arms 2 are arranged on the lifting mechanism 100, the two swing arms 2 can be arranged at least partially opposite in the front-rear direction, that is, the two swing arms 2 can abut and interfere with each other during swing and stop at the limit position.

[0243] In some embodiments, referring to FIG. 18, the two swing arms 2 can also be arranged at least partially staggered in the front-rear direction, that is, the two swing arms 2 are arranged on different planes, so that the two swing arms 2 can swing to the highest position, that is, the projections of the two swing arms 2 in the vertical plane partially overlap.

[0244] That is, the two swing arms 2 are arranged staggered in the front-rear direction, the rotation centers of the two first hinge mounting portions 21 and the rotation centers of the two second hinge mounting portions 22 are arranged in line in the projection in the vertical plane at the upper swing limit position. In this way, the lifting height of the first shelf 300 can be larger.

[0245] In the scheme for achieving a large lifting height of the shelf of the household appliance 1000, the prior art lifting mechanism 100 also needs to be optimized to reduce the arrangement of the limiting structure to stop the swing of the swing arm 2 in the lifting mechanism 100.

[0246] In some embodiments, referring to FIG. 10, the lifting mechanism 100 comprises a fixed arm 1 and two swing arms 2, the two swing arms 2 are arranged at least partially opposite in the front-rear direction, each swing arm 2 is correspondingly provided with a first hinged mounting portion 21 and a second hinged mounting portion 22, each first hinged mounting portion 21 is mounted on the fixed arm 1, and each second hinged mounting portion 22 is directly or indirectly mounted on the first shelf 300, each swing arm 2 has an upper swing limit position and a lower swing limit position, the lower swing limit position is used to enable the first shelf 300 to be in the bottom waiting lifting position, and the upper swing limit position is used to enable the first shelf 300 to be in the top lifting limit position, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut and abut.

[0247] In the technical solution of the present application, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut and abut to limit the swing of the two swing arms 2 backward or upward, without the need for additional limiting structure to achieve swing stop, which simplifies the structure setting, and at the same time, through the abutting mode of the two side surfaces, the two swing arms 2 have a larger abutting area, and the swing stop effect achieved by abutting is better.

[0248] It should be noted that the two swing arms 2 are arranged at least partially opposite in the front-rear direction, that is, the two swing arms 2 are parallel or only partially staggered in the front-rear direction, so that they can abut each other when moving, and the above-mentioned two swing arms 2 can be limited in a planar four-bar linkage mechanism.

[0249] At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut and abut. It can be understood that at the upper swing limit position, the opposite side surfaces of the two swing arms 2 can abut and abut, and at the lower swing limit position, the opposite side surfaces of the two swing arms 2 can abut and abut, and both can exist, or they can exist at the same time, all of the above are within the protection scope of the present application.

[0250] In some embodiments, the first hinged mounting portion 21 and the second hinged mounting portion 22 of the same swing arm 2 form a first connecting line.

[0251] The opposite side surfaces of the two swing arms 2 have first side edges in the length direction of the swing arms 2, which are arranged parallel to the first connecting line. In this way, when the swing arms 2 swing around the first and second hinge mounting portions 21 and 22 as the rotation centers, the opposite side surfaces of the two swing arms 2 can always remain parallel, reducing the situation of being stuck in a local scenario, and facilitating the abutting of the opposite side surfaces of the two swing arms 2 in the lower limit position, improving the stability of the entire lifting mechanism 100 during movement.

[0252] For the lower swing limit position, the two swing arms 2 can be in a vertical state or in an inclined state. In some embodiments, in the lower swing limit position, the first connecting line is arranged to extend in the up-down direction, i.e., the swing arms 2 swing in a vertical state. During the process of pulling out the first shelf 300 horizontally from the household appliance 1000, the impact on the swing arms 2 can be reduced.

[0253] In some embodiments in which the abutting of the opposite side surfaces of the two swing arms 2 is arranged in one of the upper swing limit position and the lower swing limit position, the abutting in the other position can adopt a convex abutting to reduce the abutting area.

[0254] Specifically, referring to FIGS. 10 and 17, the opposite side surfaces of the two swing arms 2 include a first side surface and a second side surface, and the first side surface is provided with an abutting convex portion 25 protruding towards the second side surface. In the lower swing limit position, the abutting convex portion 25 avoids the second side surface, and in the upper swing limit position, the abutting convex portion 25 abuts against the second side surface.

[0255] In some other embodiments, in the lower swing limit position, the abutting convex portion 25 abuts against the second side surface, and in the upper swing limit position, the abutting convex portion 25 avoids the second side surface.

[0256] In the technical solution of the present application, the abutting of the abutting convex portion 25 and the opposite side surface only needs to design the abutting convex portion 25, and the arrangement is simple. In addition, in the embodiments in which the abutting convex portion 25 abuts and the side surfaces abut, during the switching between the upper swing limit position and the lower swing limit position, the abutting convex portion 25 can be well designed to avoid.

[0257] In the embodiment in which the side surface abutting abutment is achieved at one extreme position and the abutment protrusion 25 abutting abutment is achieved at the other extreme position, the arrangement position of the abutment protrusion 25 on the swing arm 2 is not limited, which can be arranged at a position adjacent to the first hinged mounting portion 21 of the swing arm 2, or can be arranged at a position adjacent to the second hinged mounting portion 22.

[0258] In some embodiments, the two swing arms 2 include a first swing arm 2a at the rear side at the lower swing extreme position, and a second swing arm 2b at the front side, the first side surface is located on the second swing arm 2b, and the abutment protrusion 25 is arranged at one end of the second swing arm 2b provided with the first hinged mounting portion 21. The abutment protrusion 25 is arranged adjacent to the first hinged mounting portion 21 of the second swing arm 2b. When the abutment protrusion 25 abuts against the side surface of the first swing arm 2a, the user can only pull the first shelf 300 upward in a destructive manner to make the two swing arms 2 continue to swing upward, and thus the swing stopping effect between the two swing arms 2 is better.

[0259] In some embodiments, the side surface of the abutment protrusion 25 has a second side edge in the length direction of the second swing arm 2b, and the second side edge is arranged parallel to the first connecting line. In this way, the side edge of the abutment protrusion 25 can abut against the opposite side surface of the first swing arm 2a, has a more ideal abutting area, and the swing stopping effect between the first swing arm 2a and the second swing arm 2b is also better.

[0260] The height of the abutment protrusion 25 also determines the angle at which the second swing arm 2b can swing upward. In some embodiments, referring to FIG. 17, in the second swing arm 2b, the distance between the rotation center of the second hinged mounting portion 22 and the second side edge of the abutment protrusion 25 is L7, and 10mm≤L7≤30mm. In this way, on the one hand, the two swing arms 2 can be stopped by abutting to the upper swing extreme position, and on the other hand, the second swing arm 2b can swing to a larger angle to realize large height lifting of the first shelf 300.

[0261] When the distance between the rotation center of the second hinged mounting portion 22 and the second side edge of the abutting protrusion 25 is 10mm, the first swing arm 2a and the second swing arm 2b are provided with a smaller width, a weaker structural strength, and a smaller angle of upward swinging of the two swing arms 2, but the structure is light and the user uses it more labor-saving; when the distance between the rotation center of the second hinged mounting portion 22 and the second side edge of the abutting protrusion 25 is 30mm, the first swing arm 2a and the second swing arm 2b are provided with a larger width, a larger structural strength, and a larger angle of upward swinging of the two swing arms 2, but the structure is heavy and the user uses it more labor-consuming; therefore, it is a more reasonable choice to set the distance between the rotation center of the second hinged mounting portion 22 and the second side edge of the abutting protrusion 25 to a value between 10mm and 30mm.

[0262] It should be noted that the distance value L7 can be any integer value between 10mm and 30mm, such as 10mm, 20mm, 30mm, etc., and of course, it can also be a span value between any two of the above-mentioned integer values, such as a span value between 10mm and 20mm, which can be 11mm, 12m, 13m, 14mm, 15m, 16m, 17mm, 18m, 19m, etc., and of course, it can also be a span value between 20mm and 30mm; of course, it can also be some decimal values, and the above values are all within the protection scope of the present application.

[0263] The household appliance 1000 in the present application 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 higher the lifting height of the first shelf 300, and vice versa, the lifting height is relatively smaller; 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, on the basis of being able to avoid other structures in the accommodating cavity 201, the higher the installation position, the higher the lifting height of the first shelf 300, and vice versa, the lifting height is relatively smaller.

[0264] 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 elements that can realize lifting the first shelf 300 to a higher position, and the above two elements can only consider one parameter or both parameters.

[0265] The swing arm 2 can be characterized by a swing amplitude parameter, which can be represented by a swing angle of the swing arm 2 and a span between the first and second hinge mounting portions 21 and 22 in the up-down direction when the swing arm 2 is at the upper swing limit position. The greater the swing angle, the greater the height of the first shelf 300. The greater the span between the first and second hinge mounting portions 21 and 22 in the up-down direction when the swing arm 2 is at the upper swing limit position, the greater the height of the first shelf 300. The greater the span, the greater the length of the swing arm 2.

[0266] In an embodiment, as shown in FIG. 14, the swing arm 2 is used to support the first shelf 300 upwardly at the upper swing limit position, and the swing arm 2 is inclined upwardly in the rear-to-front direction.

[0267] In the technical solution of the present application, the first shelf 300 is lifted by swinging the swing arm 2, so that the shelf 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 shelf 300 upwardly, and the swing arm 2 is inclined upwardly in the rear-to-front direction. Compared with swinging the swing arm 2 to the horizontal direction, the swing arm 2 can swing at a greater angle, so that the first shelf 300 can be lifted to a greater height, reducing the user's frequent bending in operation and improving the user experience.

[0268] In the technical solution of the present application, the angle between the swing arm 2 and the horizontal direction at the upper swing limit position is not limited. In an embodiment, as shown in FIG. 14, the angle between the line connecting the centers of rotation of the first and second hinge mounting portions 21 and 22 on the same swing arm 2 and the horizontal direction at the upper swing limit position is α, and α is greater than 0° and less than or equal to 70°. The greater the angle, the greater the lifting height of the first shelf 300. Considering that the swing arm 2 needs to cooperate with other structures to achieve lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum angle of the angle is set to 70°, which is a reasonable value.

[0269] It should be noted that the included angle can be an integer value of 70°, or an arbitrary integer value between 0° and 70°, such as 10°, 20°, 30°, 40°, 50°, 60°, and the like. Of course, it can also be an angle value between any two of the above integers, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, and the like, between 0° and 10°. It can also be a degree value between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°, and of course some decimal degree values. The above values are within the scope of the present application.

[0270] It can be understood that when the α angle is large, the lifting height of the first shelf 300 is large, and the first shelf 300 is close to the housing 200 of the household appliance 1000 in the front-rear direction. During lifting of the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures in the upper space of the housing 200 is large. When the α angle is small, the lifting height of the first shelf 300 is small, and the first shelf 300 is away from the housing 200 of the household appliance 1000 in the front-rear direction. During lifting of the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures in the upper space of the housing 200 is small.

[0271] When the α angle is 70°, the first shelf 300 can be lifted to a high position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than that of the second shelf 400), meeting the large-height lifting requirement of the first shelf 300 and improving user experience.

[0272] In some embodiments, as shown in FIG. 14, two swing arms 2 are provided, and the two swing arms 2 are staggered to at least partially overlap in the vertical plane when swung to the limit position. When the α angle is 70°, the rotation centers of the two first hinge mounting portions 21 of the two swing arms 2 and the second hinge mounting portions 22 of the two swing arms 2 can be collinearly arranged, meeting the large-height lifting requirement of the first shelf 300.

[0273] After the first shelf 300 is lifted to the top limit position, and the placing and taking of the items to be placed is completed in the first shelf 300, the first shelf 300 needs to be lowered back. During the lowering back of the first shelf 300, the user needs to apply a driving force to the first shelf 300, so that the swing arm 2 swings downward around the first hinge mounting portion 21 as the center of rotation, and the value of the a angle affects the force applied by the user.

[0274] Specifically, when the value of the a angle is large, the force arm of the user pressing the first shelf 300 is small, and the force required to lower back the first shelf 300 is large; when the value of the a angle is small, the force arm of the user pressing the first shelf 300 is large, and the force required to lower back the first shelf 300 is small.

[0275] The value of the a angle needs to consider the lifting height of the first shelf 300, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the shell 200, and the force required to lower back the first shelf 300. When the value of the a angle is less than 70°, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the shell 200 is small, and subsequent detailed description will not be made for this element.

[0276] In some embodiments, the value of the a angle can be between 15° and 50°, the first shelf 300 can be lifted to a suitable high position, and the force required to lower back the first shelf 300 is moderate.

[0277] The following is described in terms of the value of the a angle, the lifting height of the first shelf 300, and the force required to lower back the first shelf 300, and the value of the a angle is taken as 70° as a reference example.

[0278] When the value of the a angle is 15°, compared with the reference example, the angle is reduced by 55°, which causes the maximum height that the first shelf 300 can be lifted to be reduced by about 0.7 times, the force arm of the user pressing the first shelf 300 is increased by about 1.8 times, the force arm is increased obviously, and the user is more labor-saving. When the value of the a angle is 15°, the force required to lower back the first shelf 300 is considered more, in this embodiment, the first shelf 300 can be lifted to a suitable height position, the force required by the user to lower back the first shelf 300 is small, the household appliance 1000 is easier and more convenient to operate, and the user experience is improved.

[0279] When the α angle is 50°, the angle is reduced by 20° compared to the reference example, which causes the maximum height that the first shelf 300 can be lifted to decrease by about 0.2 times, the force arm of the force exerted by the user to press the first shelf 300 increases by about 1.2 times, the decrease in height is obvious, and the first shelf 300 can be at a relatively large height. When the α angle is 50°, the lifting height of the first shelf 300 is considered more, and in this embodiment, the force required for the first shelf 300 to drop and play back can be ensured to be moderate, the first shelf 300 can be lifted to a suitable high position as much as possible, and the large height lifting requirement of the first shelf 300 is met.

[0280] In some preferred embodiments, when the α angle is around 25°, the angle is reduced by 45° compared to the reference example, which causes the maximum height that the first shelf 300 can be lifted to decrease by about 0.6 times, and the decrease in height is moderate; the force arm of the force exerted by the user to press the first shelf 300 increases by about 1.6 times, the increase in the force arm is moderate, and the lifting height of the first shelf 300 and the force required for the first shelf 300 to drop and play back are considered.

[0281] For the span between the first hinge mounting portion 21 and the second hinge mounting portion 22 in the up-down direction when the swing arm 2 is at the upper swing limit position, in an embodiment, please continue to refer to FIG. 14, the span of the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 in the up-down direction is L1, and L1 is greater than 0 mm and less than or equal to 235 mm. The greater the span, the greater the height that the first shelf 300 is lifted to. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum span of 235 mm is a relatively reasonable value.

[0282] It should be noted that the span can be any integer value between 0 and 235, such as 50 mm, 100 mm, 150 mm, 200 mm, 235 mm, 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 50 mm, which can be 10 mm, 20 mm, 30 mm, 40 mm, etc. Of course, it can also be a span value between 150 mm and 200 mm, which can be 160 mm, 170 mm, 180 mm, 190 mm, etc. It can also be a span value between 50 mm and 100 mm, a span value between 100 mm and 150 mm, a span value between 200 mm and 235 mm, etc. Of course, it can also be a decimal value. The above values are within the protection scope of the present application.

[0283] It can be understood that the greater the value of the span L1, the greater the lifting height of the first shelf 300. When the limit angle a of the swing arm 2 is unchanged, the arm length of the swing arm 2 needs to be set longer when the first shelf 300 is lifted to a greater height. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a larger external space of the housing 200 of the household appliance 1000.

[0284] When the span L1 is 235 mm, as shown in FIG. 14, the first shelf 300 can be lifted to a higher position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than the bottom of the second shelf 400), which meets the lifting requirement of a large height.

[0285] In some embodiments, the value of the span L1 can be between 60 mm and 190 mm. The following is described with respect to the value of the span L1, the limit swing angle of the swing arm 2, and the length of the swing arm 2, and the value of the span L1 is 235 mm and the limit swing angle of the swing arm 2 is 70° as a reference example.

[0286] When the value of the span L1 is 60 mm, the span is reduced by about 175 mm relative to the reference example, which causes the arm length of the swing arm 2 to be shortened by about 0.7 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a relatively small external space of the housing 200 of the household appliance 1000, thereby saving the use space.

[0287] When the value of the span L1 is 190 mm, the span is reduced by about 45 mm relative to the reference example, which causes the arm length of the swing arm 2 to be shortened by about 0.2 times, and the lifting height of the first shelf 300 is reduced by about 0.2 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a moderate external space of the housing 200 of the household appliance 1000, and the lifting height of the first shelf 300 is relatively large.

[0288] In some preferred embodiments, when the span L1 is about 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, the maximum height to which the first shelf 300 can be lifted being reduced by about 0.6 times, and 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 housing 200 of the household appliance 1000, saving space, and the height to which the first shelf 300 is lifted is moderate, meeting the requirement for lifting to a large height.

[0289] It can be understood that the value of the angle a and the value of the span L1 are interrelated, and when the arm length of the swing arm 2 is unchanged, the value of the angle a and the value of the span L1 are positively correlated, that is, the larger the value of the angle a, the larger the value of the span L1, the greater the height to which 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-rear direction, and the greater the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 during lifting of the first shelf 300 by the lifting mechanism 100.

[0290] The value of the angle a and the value of the span L1 are positively correlated, that is, the smaller the value of the angle a, the smaller the value of the span L1, the smaller the height to which the first shelf 300 can be lifted, and the farther the first shelf 300 is from the housing of the household appliance 1000 in the front-rear direction, and the smaller the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 during lifting of the first shelf 300 by the lifting mechanism 100.

[0291] In some embodiments, the value of the angle a can be between 15° and 50°, and the value of the span L1 can be between 60 mm and 190 mm, and the relevant descriptions of the value of the angle a and the value of the span L1 described above can be referred to, and will not be described here.

[0292] The upper swing limit position of the swing arm 2 defines the upper swing limit position of the swing arm 2. When 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, some embodiments, please continue to refer to FIG. 14, the swing arm 2 has a lower swing limit position corresponding to the bottom of the first shelf 300 to be lifted position, the swing arm 2 has a swing angle defined between the upper swing limit position and the lower swing limit position, the swing angle is obtuse angle, so as to increase the swing angle of the swing arm 2, so that the first shelf 300 can be moved to a higher position, the height of the first shelf 300 is increased, the frequency of bending of the user in the use process is reduced, and the user experience is improved.

[0293] The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2, and 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 completely the same.

[0294] Please refer to FIG. 14, which shows the lower swing limit position and the upper swing limit position of the swing arm 2. The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. In the embodiment in which the swing arm 2 is provided as two, the swing angles of the two swing arms 2 are set to be the same.

[0295] In the technical solution of the present application, the swing angle is not limited to a specific angle value. In some embodiments, please continue to refer to FIG. 14, the swing angle is β, and β is greater than 90° and less than or equal to 160°. The greater the swing angle, the greater the lifting height of the first shelf 300. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum angle of the included angle is set to 160°, which is a more reasonable value.

[0296] It should be noted that the swing angle can be an integer value of 160°, or an arbitrary integer value between 90° and 160°, such as 100°, 110°, 120°, 130°, 140°, 150°, and the like. Of course, it can also be an angle value between any two of the above integers, such as between 90° and 100°, which can be 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, and the like. It can also be between 100° and 110°. It can also be between 110° and 120°. It can also be between 120° and 130°. It can also be between 130° and 140°. It can also be between 140° and 150°. It can also be between 150° and 160°. Of course, it can also be some decimal degree value. The above values are all within the scope of the present application.

[0297] In an embodiment, referring to FIGS. 3, 7, 13, and 23, the lifting mechanism 100 further includes a first guide rail 4, which includes multiple sections of slide rails connected to each other in a telescopic sliding manner. The multiple sections of slide rails include at least a first section of slide rail 41 and a last section of slide rail 42. The first section of slide rail 41 is connected to the connecting piece 3, and the last section of 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 the bottom storage position and the bottom lifting position. By the telescopic movement of the first guide rail 4, the positional relationship of the first shelf 300 relative to the connecting piece 3 can be adjusted, so that the first shelf 300 can be moved to the bottom storage position and stored in the accommodation cavity 201.

[0298] After the lifting mechanism 100 lifts the first shelf 300 to a suitable position, the first shelf 300 needs to be locked to prevent it from falling back under the action of gravity without human intervention, thereby reducing the user experience. In some embodiments, referring to FIGS. 23-25, the lifting mechanism 100 further includes a locking structure 5, which is used to relatively lock the swing arm 2 and the first shelf 300 after the first shelf 300 is lifted, i.e., the first shelf 300 is locked by the locking structure 5, so that the swing arm 2 and the first shelf 300 are relatively locked in rotation. During user use, the swing arm 2 and the first shelf 300 remain in a relatively locked state of rotation, except for being unlocked by a person. In this way, the user can conveniently operate when placing and taking the objects to be placed, and the user experience is better.

[0299] In the embodiment that the first shelf 300 is lockable relative to the swing arm 2, the first shelf 300 can be lockable in the front-to-back direction, such as being lockable in the front-pulling direction or the rear-pushing direction. During the swing of the swing arm 2, the first shelf 300 moves upward and forward, and thus, the front-pulling locking is more in line with the user's habits.

[0300] In an embodiment, the lifting mechanism 100 further comprises a connecting member 3, and the locking structure 5 comprises a locking member 5a which is movably mounted relative to the connecting member 3 in the front-to-back direction and is used to mount the first shelf 300.

[0301] It should be noted that, in the front-pulling locking mode, the first shelf 300 is lockable relative to the swing arm 2 in the forward direction, i.e., when the first shelf 300 is at the top lifting limit position, the first shelf 300 continues to move forward to correspond to the top locking position. The first shelf 300 has a horizontal distance difference between the top lifting limit position and the top locking position, and they are two different positions.

[0302] A sliding cooperation structure is arranged between the locking member 5a and the swing arm 2. During the forward movement of the locking member 5a relative to the connecting member 3, the sliding cooperation structure is in sliding cooperation, so that the first shelf 300 can move from the top lifting limit position to the top locking position. The front-pulling locking of the first shelf 300 can be achieved through the cooperation of the sliding cooperation structure, and there is no need to additionally provide a complex locking and unlocking mechanism, and the user operation is more convenient.

[0303] In the technical solution of the present application, the specific structure of the sliding cooperation structure is not limited, such as two mutually cooperating structures, one of which can be a shaft, and the other of which can be a rib or a groove, or a cooperation mode in which part of the rib and part of the groove are provided.

[0304] In an embodiment, referring to FIGS. 23-25, the sliding cooperation structure comprises a cooperating sliding groove and a sliding shaft which are in sliding cooperation with each other. At least one of the cooperating sliding grooves comprises a horizontal groove segment 5111 extending in the front-to-back direction. During the forward movement of the locking member 5a relative to the connecting member 3, the corresponding sliding shaft can be slid into the horizontal groove segment 5111, so that the swing arm 2 is stopped.

[0305] The horizontal slot segment 5111 has upper and lower slot walls in the up-down direction, and the sliding shaft and the upper or lower slot wall abut to limit the up-down direction, at which time the swing arm 2 stops swinging, i.e., the first shelf 300 is locked relative to the swing arm 2, and the sliding locking is achieved through the cooperation of the sliding shaft and the matching sliding groove, without the need for additional mechanisms, and the structure is simple. In addition, it also conforms to the user's operation habits, improving the user experience.

[0306] The present application does not limit the specific setting position of the sliding shaft and the matching sliding groove. For example, the sliding shaft can be arranged on the swing arm 2, and the matching sliding groove can be arranged on the locking member 5a. Alternatively, the sliding shaft can be arranged on the locking member 5a, and the matching sliding groove can be arranged on the swing arm 2.

[0307] In an embodiment, the matching sliding groove can be the horizontal slot segment 5111 only, and when the swing arm 2 is at the upper swing limit position, the sliding shaft is at the front end slot of the horizontal slot segment 5111, and when the locking member 5a is pulled forward, the sliding shaft slides backward into the horizontal slot segment 5111. When the swing arm 2 does not reach the upper swing limit position, the sliding shaft can be outside the locking member 5a or the swing arm 2.

[0308] In an embodiment, the matching sliding groove further includes an arc-shaped slot segment 5112, and the extension path of the arc-shaped slot segment 5112 is adapted to the rotation of the sliding shaft, i.e., the sliding shaft is always in the arc-shaped slot segment 5112 during the entire swing stroke of the swing arm 2, improving the stability of the swing arm 2 during the swing process.

[0309] The matching sliding groove can be arranged on the locking member 5a or the swing arm 2. In an embodiment, the matching sliding groove is arranged on the locking member 5a, and the sliding cooperation structure is provided in two groups. The sliding shafts of the two groups of sliding cooperation structures are arranged on the same swing arm 2, and the matching sliding grooves of the two groups of sliding cooperation structures are arranged on the locking member 5a. By arranging two groups of sliding cooperation structures, the stability of the locking of the first shelf 300 is improved.

[0310] Since the positions of the sliding shafts of the two groups of sliding cooperation structures relative to the second hinge mounting portion 22 are different, the corresponding radii of rotation are also different, and the corresponding arc-shaped trajectories of rotation are also different. For the same locking member 5a, different trajectory lines are formed on the locking member 5a.

[0311] Specifically, the two sliding shafts include a first sliding shaft 513 adjacent to the second hinge mounting portion 22 and a second sliding shaft 514 away from the second hinge mounting portion 22.

[0312] Two said matching sliding grooves include a first matching sliding groove 511 arranged corresponding to the first sliding shaft 513, and a second matching sliding groove 512 arranged corresponding to the second sliding shaft 514, the guide inlet of the first matching sliding groove 511 is arranged at the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged at the front side end of the locking member 5a, by guiding in different positions, the stability of the first shelf 300 during lifting is better.

[0313] The guide inlet of the first matching sliding groove 511 is arranged at the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged at the front side end of the locking member 5a, the first sliding shaft 513 and the second sliding shaft 514 are respectively matched and installed, and corresponding to the swinging of the swing arm 2 between the lower swing limit position and the upper swing limit position, the first sliding shaft 513 and the second sliding shaft 514 staggered slide similar to horizontal sliding and upward and downward sliding, so that the first shelf 300 is in a stable state.

[0314] The first shelf 300 and the locking member 5a are connected, so that the first shelf 300 can move linearly along the front and back direction relative to the connecting member 3, as described above, a first guide rail 4 is arranged between the connecting member 3 and the locking member 5a, by the relative movement between the first guide rail 41 and the tail section sliding rail 42 of the first guide rail 4, the first shelf 300 can move linearly along the front and back direction relative to the connecting member 3.

[0315] In the embodiment in which two swing arms 2 are arranged, the locking structure 5 described above can be arranged on both of the swing arms 2, by arranging two locking structures 5 to lock two swing arms 2 respectively, repeated locking makes the locking of the first shelf 300 in the top locking position more reliable, and reduces the risk of falling by itself.

[0316] In an embodiment, the locking structure 5 only makes one of the swing arms 2 and the first shelf 300 relatively stop rotating, and any one of the two swing arms 2.

[0317] In order to ensure the stability of the lifting mechanism 100 during the lifting of the first shelf 300, the lifting mechanism 100 adopts a four-bar linkage mechanism, i.e. in the form of the fixed arm 1, two swing arms 2 and the connecting piece 3, which is arranged as a parallelogram linkage mechanism, so that for the mounting positions of the two swing arms 2 on the fixed arm 1, one is on the upper side and the other is on the lower side. In an embodiment, when both of the two swing arms 2 are at the lower swing limit position, the two swing arms 2 include a first swing arm 2a on the left side and a second swing arm 2b on the right side, the mounting position of the first swing arm 2a on the fixed arm 1 is on the lower side, and the mounting position of the second swing arm 2b on the fixed arm 1 is on the upper side.

[0318] For the two sliding shafts, both are arranged on the second swing arm 2b, so that when the second swing arm 2b corresponds to the upper swing limit position, the upper end of the second swing arm 2b is higher than the upper end of the first swing arm 2a, and at this time, the second swing arm 2b and the locking piece 5a arranged on the shelf are conveniently locked.

[0319] In addition, it also needs to be explained that in the household appliance 1000, two lifting mechanisms 100 are arranged and are arranged in the left-right direction, i.e. two support points are formed on both sides of the first shelf 300 in the left-right direction, and through the arrangement of the two lifting mechanisms 100, the first shelf 300 can be stably lifted.

[0320] Of course, in the embodiment of arranging two lifting mechanisms 100, the swing arms 2 can be correspondingly arranged with two or four, for jointly supporting the first shelf 300.

[0321] In the lifting mechanism 100, for the swing arms 2 and the fixed arm 1, a damping structure such as an air spring or a spring can be arranged between the swing arms 2 and the fixed arm 1, so as to reduce the force of the user during the lifting or falling of the first shelf 300.

[0322] The specific structure of the household appliance 1000 will be described in detail in combination with some features of the lifting mechanism 100 proposed in the present application.

[0323] The household appliance 1000 includes a housing 200, which is formed with a receiving cavity 201, and an opening is further arranged on the front side of the housing 200, and a door body is arranged at the opening, the door body is opened to a suitable position to open the opening, at this time, the user can pull out the first shelf 300, and under the cooperation of the lifting mechanism 100, the first shelf 300 is lifted and extends out of the receiving cavity 201, so as to take out or put in the articles to be placed by the user.

[0324] The accommodating cavity 201 has a rear wall opposite to the opening and two side walls on both sides of the rear wall, the fixing arm 1 is fixed to the side wall, and the swing arm 2 of the lifting mechanism 100 moves in and out of the accommodating cavity 201 with the connecting position of the side wall as the hinge point, so as to realize the lifting of the first shelf 300.

[0325] Corresponding in the household appliance 1000, the first shelf 300 can have two positions of a bottom to be lifted position and a top lifting limit position; considering the embodiment that the first shelf 300 can move forward and backward relative to the connecting piece 3, the first shelf 300 can have three positions of a bottom storage position, a bottom to be lifted position and a top lifting limit position; considering the embodiment that the first shelf 300 can move forward relative to the connecting piece 3 and be locked, the first shelf 300 can have four positions of a bottom storage position, a bottom to be lifted position, a top lifting limit position and a top locking position.

[0326] In some household appliances 1000, only one shelf is provided, two shelves are provided, or more shelves are provided, in the technical solution of the present application, referring to FIG. 19 and FIG. 20, a second shelf 400 is further provided in the accommodating cavity 201, corresponding to the top lifting limit position, the lower end of the first shelf 300 protrudes upward from the lower end of the second shelf 400, that is, the lifting height of the first shelf 300 is higher than that of the second shelf 400 at the lifting limit position of the first shelf 300, at this time, the lifting height is large, the frequency of bending over of the user is reduced, and the user experience is improved.

[0327] It should be noted that in the embodiment that two shelves are provided 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 at 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 is arranged opposite to the second shelf 400.

[0328] In view of the above-mentioned embodiments, the user needs to alternately use the first shelf 300 and the second shelf 400, that is, when the first shelf 300 is lifted, the second shelf 400 is kept in the accommodating cavity 201 as much as possible; when the second shelf 400 is used, the first shelf 300 is kept in the accommodating cavity 201 as much as possible, or the second shelf 400 is not lifted as much as possible.

[0329] Of course, for the upper end of the first shelf 300 and the upper end of the second shelf 400, in an embodiment, corresponding to the top lifting limit position and the top lifting locking position of the first shelf 300, the upper end of the first shelf 300 protrudes upwardly from the upper end of the second shelf 400, that is, under the premise that the first shelf 300 and the second shelf 400 have the same depth, the first shelf 300 can be at a higher position.

[0330] Corresponding to the product in which the household appliance 1000 is a dishwasher, the first shelf 300 corresponds to the lower basket of the dishwasher, and the second shelf 400 corresponds to the upper basket of the dishwasher. When using the lower basket of the dishwasher, the lifting mechanism 100 lifts the lower basket of the dishwasher to a position higher than the upper basket. In this state, the user has the same operating height as when using the upper basket of the dishwasher, or a higher height, and the user's operating experience will be better.

[0331] The following describes the user's use of the household appliance 1000 with reference to the structure of the household appliance 1000, taking the first shelf 300 as an example:

[0332] 1. The first shelf 300 is in the bottom storage position, as shown in FIGS. 1-4:

[0333] This state is the state in which the user is not using, or has just started using, or has finished using. In these states, the first shelf 300 is in the containing cavity 201 of the household appliance 1000. As can be seen from FIGS. 1-4, the first shelf 300 is stored in the containing cavity 201. At this time, the distance between the first section of the first guide rail 4 and the tail section of the guide rail 42 is the smallest or the distance of coincidence is the largest, and the swing arm 2 is at the lower swing limit position.

[0334] 2. The first shelf 300 is in the bottom lifting position, as shown in FIGS. 5-10:

[0335] This state is the state in which the user pulls out the first shelf 300 from the containing cavity 201, or the state in which the user lowers the first shelf 300 after using it. In these states, the first shelf 300 is at the opening of the containing cavity 201. As can be seen from FIGS. 5-10, at this time, the distance between the first section of the first guide rail 4 and the tail section of the guide rail 42 is relatively large or the distance of coincidence is relatively small. The first shelf 300 moves forward relative to the containing cavity 201 by a distance, and the swing arm 2 is still at the lower swing limit position.

[0336] 3. The first shelf 300 is in the top lifting limit position, as shown in Figs. 11-20:

[0337] This state is that the user lifts the first shelf 300, or the user exits the locking state after using the first shelf 300. In these states, the first shelf 300 is at the maximum height of lifting. As can be seen from Figs. 11-20, the distance between the first guide rail 4 and the tail section rail 42 is relatively large or the overlapping distance is small. The distance or the overlapping distance relative to the first shelf 300 at the bottom of the lifting position is unchanged. The swing arm 2 is at the upper swing limit position.

[0338] 4. The first shelf 300 is in the top locking position, as shown in Figs. 21-25:

[0339] This state is a locking state after the user lifts the first shelf 300. At this time, the user can take and place the items to be placed. In these states, the first shelf 300 is at the maximum height of lifting. As can be seen from Figs. 21-25, the distance between the first guide rail 4 and the tail section rail 42 is maximum or the overlapping distance is minimum. The first shelf 300 is moved forward a distance relative to the top lifting limit position at the top locking position. The swing arm 2 is still at the upper swing limit position.

[0340] The following introduces a complete use process of the user:

[0341] When the user needs to use the household appliance 1000, first open the door of the household appliance 1000. The user pulls the first shelf 300 forward from the bottom storage position to the bottom lifting position in the containing cavity 201. Under the 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 locking state, the user can take and place the items to be placed in the first shelf 300 under the condition of reducing the frequency of bending over.

[0342] When the user finishes the taking and placing of the to-be-shelved items, the user pushes the first shelf 300 backward, so that the first shelf 300 is unlocked and moves from the top unlocked position to the top lifting limit position; the user lowers the first shelf 300, so that the first shelf 300 moves from the top lifting limit position to the bottom to-be-lifted position; the user continues to push the first shelf 300 backward, so that the first shelf 300 moves from the bottom to-be-lifted position to the bottom storage position, and when the first shelf 300 is at the bottom storage position, the user can close the door body, completing the use of the household appliance 1000.

[0343] In a household appliance with an internal space, a movable storage structure such as a shelf capable of extending out of the internal space of the household appliance is usually configured. Some movable storage structures in the prior art have a pulling-out function and also have a lifting function.

[0344] In some household appliances, the shelf is usually arranged at the bottom of the household appliance. During use, such as taking and placing tableware, the user needs to frequently bend down. In order to reduce the frequency of bending down during the use of the shelf, the lifting mechanism is used to lift the shelf for use in the prior art, which can reduce the frequency of bending down. However, the lifting height of the shelf is relatively low by using the existing lifting mechanism, and the user still needs to frequently bend down during use, which results in poor user experience.

[0345] Therefore, the household appliance provided in the present application can lift the shelf to a relatively high height, reduce the frequency of bending down of the user during operation, and improve the user experience. FIGS. 28-50 are structural schematic diagrams of the household appliance provided in the present application.

[0346] Please refer to FIGS. 30-31. The present application provides a household appliance 1000, which can be a dishwasher, an oven, an oven, a refrigerator, etc. The household appliance 1000 includes a housing 200, and an accommodating cavity 201 is formed in the housing 200. A first shelf 300 is connected to the accommodating cavity 201 by a lifting mechanism 100. The first shelf 300 is provided with to-be-shelved items, such as bowls, dishes, plates, chopsticks, knives and forks, and the like. The to-be-shelved items can also be baked food or to-be-refrigerated items, etc.

[0347] In the present application, the user is used as a reference direction. Forward means the direction towards the user or the side of the household appliance 1000 provided with a door body. Backward means the direction opposite to the forward direction, specifically the direction away from the user. Up and down directions mean the direction with gravity as a reference.

[0348] It should be noted that in some household appliances 1000, there is only one shelf, such as the first shelf 300. There are also multiple shelves. In the embodiment of the household appliance 1000, multiple shelves can be provided, such as the first shelf 300 and the second shelf 400. When the two shelves have an up-down positional relationship, they can be referred to as an upper shelf and a lower shelf. In the description of the embodiment of the present application, the first shelf 300 corresponds to the lower shelf, and the second shelf 400 corresponds to the upper shelf.

[0349] For the first shelf 300, the first shelf 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 to a suitable position. Specifically, after the door body of the household appliance 1000 is opened, the user needs to put or take the object to be placed in or out of the first shelf 300. The user often pulls the first shelf 300 forward. During the movement of the first shelf 300, a combined movement process occurs, that is, the first shelf 300 moves forward and upward at the same time. At this time, the lifting mechanism 100 will follow the movement and support the first shelf 300.

[0350] The first shelf 300 has several important positions during its movement. Commonly, there are a bottom storage position (as shown in FIGS. 30 and 31), a bottom to-be-lifted position (as shown in FIGS. 34 and 35), a top lifting limit position (as shown in FIGS. 39 and 40), and a top locking position (as shown in FIGS. 46 and 47).

[0351] In some embodiments, the first shelf 300 can have only two positions, such as the bottom to-be-lifted position and the top lifting limit position. The first shelf 300 can also have three positions, such as the bottom storage position, the bottom to-be-lifted position, and the top lifting limit position. At this time, the top lifting limit position and the top locking position of the first shelf 300 can be the same position. The first shelf 300 can also have four positions, such as the bottom storage position, the bottom to-be-lifted position, the top lifting limit position, and the top locking position. At this time, the top lifting limit position and the top locking position of the first shelf 300 are different positions.

[0352] For the lifting mechanism 100, the lifting mechanism 100 mainly realizes the lifting of the first shelf 300. The action of the lifting mechanism 100 can correspond only to the bottom to-be-lifted position and the top lifting limit position of the first shelf 300.

[0353] The lifting mechanism 100 in the household appliance 1000 usually adopts a linkage mechanism, that is, the lifting of the first shelf 300 is realized by a single linkage or a combination of several linkages. In the embodiment with only one linkage, the linkage can be provided as a swing arm 2, two ends of the swing arm 2 are respectively formed with a first hinged mounting portion 21 and a second hinged mounting portion 22, the first hinged mounting portion 21 is hinged in 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. In addition, the swing of the swing arm 2 can be assisted by other support structures, and of course, a plurality of linkage mechanisms can also be provided on both sides of the first shelf 300, that is, two swing arms 2 are provided on both sides of the first shelf 300 to realize the swing, so that the single swing arm 2 can lift the first shelf 300 in the swing stroke.

[0354] In the combination of a plurality of linkages, a four-linkage mechanism is usually adopted, and in the four-linkage mechanism, two of the linkages can be provided as swing arms 2, that is, the lifting of the first shelf 300 is realized by the form of double swing arms 2, so that the stability of the first shelf 300 in the lifting process is better, which will be described in detail in subsequent embodiments.

[0355] 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 shelf 300 has only a bottom storage position and a top lifting limit position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position.

[0356] When the first shelf 300 has a bottom storage position, a bottom lifting standby position, and a top lifting limit position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position and the bottom lifting standby position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position.

[0357] When the first shelf 300 has a bottom storage position, a bottom lifting standby position, a top lifting limit position, and a top locking position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position and the bottom lifting standby position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position and the top locking position.

[0358] It should be noted that the first hinged mounting portion 21 of the swing arm 2 is a fixed hinged point, the position of which does not change, and the swing movement of the swing arm 2 only indicates the movement of the movable hinged point of the swing arm 2, i.e., the movement of the end of the swing arm 2 provided with the second hinged mounting portion 22, and the upper swing limit position of the swing arm 2 and the lower swing limit position of the swing arm 2 are both referenced to the movable end of the swing arm 2, i.e., 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, and 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.

[0359] In the scheme for achieving the large height lifting of the shelf of the household appliance 1000, the lifting mechanism 100 in the prior art also needs to be optimized to reduce the setting of the limiting structure to achieve the swing stopping of the swing arm 2 in the lifting mechanism 100.

[0360] In some embodiments, referring to FIG. 28, the lifting mechanism 100 includes a fixed arm 1 and two swing arms 2, the two swing arms 2 are at least partially oppositely arranged in the front-rear direction, and the two ends of each swing arm 2 are correspondingly provided with a first hinged mounting portion 21 and a second hinged mounting portion 22, each first hinged mounting portion 21 is mounted to the fixed arm 1, and each second hinged mounting portion 22 is used to be directly or indirectly mounted to the first shelf 300, each swing arm 2 has an upper swing limit position and a lower swing limit position, the lower swing limit position is used to enable the first shelf 300 to be at the bottom to-be-lifted position, and the upper swing limit position is used to enable the first shelf 300 to be at the top lifted limit position, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut against each other.

[0361] In the technical scheme of the present application, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut against each other to limit the swing stopping of the two swing arms 2 to the rear or upward, and the swing stopping can be achieved without the need for additional limiting structures, thereby simplifying the structure setting.

[0362] In some embodiments, at the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut against each other, and through the abutting of the two side surfaces, the two swing arms 2 have a larger abutting area, and the swing stopping achieved through the abutting has a better effect.

[0363] It should be noted that the two swing arms 2 are at least partially arranged opposite to each other in the front-rear direction, that is, the two swing arms 2 are parallel in the front-rear direction or are only partially staggered to enable mutual abutment between the two swing arms 2 when in motion. The two swing arms 2 can be limited in a planar four-bar linkage. In some embodiments, the two swing arms 2 are staggered in the front-rear direction, that is, the two swing arms 2 are not in the same plane but are in different planes. The two swing arms 2 can be limited in a spatial four-bar linkage.

[0364] In the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms 2 abut against each other. It can be understood that, in the upper swing limit position, the opposite side surfaces of the two swing arms 2 can abut against each other, and in the lower swing limit position, the opposite side surfaces of the two swing arms 2 can abut against each other. One of the two conditions can exist or both conditions can exist, and both conditions are within the protection scope of the present application.

[0365] In some embodiments, the first hinge mounting portion 21 and the second hinge mounting portion 22 of the same swing arm 2 have a first connecting line 26 formed between the rotation centers of the two hinge mounting portions.

[0366] The opposite side surfaces of the two swing arms 2 have a first side edge 27 in the length direction of the swing arm 2. The first side edge 27 is arranged parallel to the first connecting line 26. In this way, when the swing arm 2 swings around the first hinge mounting portion 21 and the second hinge mounting portion 22 as the rotation centers, the opposite side surfaces of the two swing arms 2 can always remain parallel, reducing the situation of being stuck in a local scenario, and facilitating the abutment of the opposite side surfaces of the two swing arms 2 in the lower limit position, and improving the stability of the entire lifting mechanism 100 during the movement.

[0367] For the lower swing limit position, the two swing arms 2 can be in a vertical state or in an inclined state. In some embodiments, in the lower swing limit position, the first connecting line 26 extends in the up-down direction, that is, the swing arm 2 is in a vertical state. During the process of pulling out the first shelf 300 horizontally from the household appliance 1000, the impact on the swing arm 2 can be reduced.

[0368] In some embodiments in which the opposite side surfaces of the two swing arms 2 abut against each other in one of the upper swing limit position and the lower swing limit position, the abutment in the other position can adopt a convex portion to reduce the abutment area.

[0369] Specifically, referring to FIGS. 28 and 29, the two opposite side surfaces of the swing arm 2 include a first side surface 28 and a second side surface 29, the first side surface 28 is provided with an abutting protrusion 25 protruding towards the second side surface 29, wherein, at the lower swing limit position, the abutting protrusion 25 avoids the second side surface 29; at the upper swing limit position, the abutting protrusion 25 abuts against the second side surface 29.

[0370] In some other embodiments, at the lower swing limit position, the abutting protrusion 25 abuts against the second side surface 29, and at the upper swing limit position, the abutting protrusion 25 avoids the second side surface 29.

[0371] In the technical solution of the present application, by means of abutting the abutting protrusion 25 against the opposite side surface, only the abutting protrusion 25 needs to be designed, and the setting mode is simple; in addition, in the embodiment combining the abutting of the abutting protrusion 25 and the abutting and fitting of the side surface, in the switching process between the upper swing limit position and the lower swing limit position, the abutting protrusion 25 can be well designed to avoid.

[0372] In the embodiment in which the abutting and fitting of the side surface is realized at one limit position and the abutting of the abutting protrusion 25 is realized at the other limit position, the setting position of the abutting protrusion 25 on the swing arm 2 is not limited, for example, it can be set at a position adjacent to the first hinged mounting portion 21 of the swing arm 2, or at a position adjacent to the second hinged mounting portion 22.

[0373] In some embodiments, the two swing arms 2 include a first swing arm 2a at the rear side at the lower swing limit position and a second swing arm 2b at the front side, the first side surface 28 is located on the second swing arm 2b, and the abutting protrusion 25 is arranged at one end of the second swing arm 2b provided with the first hinged mounting portion 21. By arranging the abutting protrusion 25 adjacent to the first hinged mounting portion 21 of the second swing arm 2b, when the abutting protrusion 25 abuts against the side surface of the first swing arm 2a, the user can only pull the first shelf 300 upwards in a destructive manner to make the two swing arms 2 continue to swing upwards, and thus the swing stopping effect between the two swing arms 2 is better.

[0374] In some embodiments, the side surface of the abutting protrusion 25 has a second side edge 30 along the length direction of the second swing arm 2b, and the second side edge 30 is arranged in parallel with the first connecting line 26, so that the side edge of the abutting protrusion 25 can abut against the opposite side surface of the first swing arm 2a, has a relatively ideal abutting area, and the swing stopping effect between the first swing arm 2a and the second swing arm 2b is also better.

[0375] The height of the abutting protrusion 25 also determines the angle at which the second swing arm 2b can swing upward. In some embodiments, referring to FIG. 29, the distance between the rotation center of the second hinge mounting portion 22 and the second side edge 30 of the abutting protrusion 25 is L7, and 10mm≤L7≤30mm. In this way, on the one hand, the two swing arms 2 can be stopped at the upper swing limit by abutting, and on the other hand, the second swing arm 2b can swing to a larger angle, achieving a large height of the first shelf 300.

[0376] When the distance between the rotation center of the second hinge mounting portion 22 and the second side edge 30 of the abutting protrusion 25 is 10mm, the first swing arm 2a and the second swing arm 2b have a smaller width and weaker structural strength, and the two swing arms 2 have a smaller upward swing angle, making the structure lightweight and easier for users to use.

[0377] When the distance between the rotation center of the second hinge mounting portion 22 and the second side edge 30 of the abutting protrusion 25 is 30mm, the first swing arm 2a and the second swing arm 2b have a larger width and greater structural strength, and the two swing arms 2 have a larger upward swing angle, making the structure heavy and more difficult for users to use.

[0378] The distance between the rotation center of the second hinge mounting portion 22 and the second side edge 30 of the abutting protrusion 25 is set to be between 10mm and 30mm, for example, in some embodiments, the value of L7 is 20mm, taking into account the better structural strength of the two swing arms 2 and the better convenience of user operation.

[0379] It should be noted that the distance value L7 can be any integer value between 10mm and 30mm, such as 10mm, 20mm, 30mm, etc. It can also be a span value between any two of the above integers, such as a span value between 10mm and 20mm, which can be 11mm, 12m, 13m, 14mm, 15m, 16m, 17mm, 18m, 19m, etc. It can also be a span value between 20mm and 30mm. It can also be a decimal value. The above values are within the scope of the present application.

[0380] The household appliance 1000 in the present application 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 greater the swing amplitude, the higher the first shelf 300 is lifted. Conversely, the lifting height is relatively small. The second 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 position of the installation is relatively high on the basis of being able to avoid other structures in the accommodating cavity 201. The higher the first shelf 300 is lifted, the greater the height of the first shelf 300 is lifted. Conversely, the lifting height is relatively small.

[0381] 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 shelf 300 to a higher position. The above two factors can only consider one parameter or both parameters.

[0382] The swing amplitude parameter of the swing arm 2 can be represented as the swing angle of the swing arm 2 and the span between the first hinge mounting portion 21 and the second hinge mounting portion 22 in the up-down direction when the swing arm 2 is at the upper swing limit position. The greater the swing angle, the greater the height of the first shelf 300 is lifted. Conversely, the lifting height is relatively small. For the span between the first hinge mounting portion 21 and the second hinge mounting portion 22 in the up-down direction when the swing arm 2 is at the upper swing limit position, the greater the span, the greater the height of the first shelf 300 is lifted. Conversely, the lifting height is relatively small. For the swing arm 2, a large span requires a longer length of the swing arm 2.

[0383] In an embodiment, please refer to FIG. 42. At the upper swing limit position, the swing arm 2 is used to support the first shelf 300 upward, and in the rear-to-front direction, the swing arm 2 is upwardly inclined.

[0384] In the technical solution of the present application, the first shelf 300 is lifted by the swing of the swing arm 2, so that the shelf 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 shelf 300 upward, and in the rear-to-front direction, the swing arm 2 is upwardly inclined. Relative to the swing of the swing arm 2 to the horizontal direction, the swing arm 2 can swing a larger angle, so that the first shelf 300 can be lifted to a greater height, reducing the user's frequent bending in operation and improving the user experience.

[0385] In the technical solution of the present application, the included angle between the swing arm 2 relative to the horizontal direction is not limited to the upper swing limit position. In an embodiment, referring to FIG. 42, the included angle between the line connecting the rotation centers of the first and second hinge mounting portions 21 and 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 greater the included angle, the greater the lifting height of the first shelf 300. Considering that the swing arm 2 needs to cooperate with other structures to achieve lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum angle of the included angle is set to 70°, which is a relatively reasonable value.

[0386] It should be noted that the included angle can be an integer value of 70°, or any integer value between 0° and 70°, such as 10°, 20°, 30°, 40°, 50°, 60°, etc. Of course, it can also be an angle value between any two of the above integers, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc. between 0° and 10°, it can also be between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°, and of course it can also be some decimal degree value. The above values are within the scope of the present application.

[0387] It can be understood that the greater the α angle, the greater the lifting height of the first shelf 300, and the closer the first shelf 300 is to the housing 200 of the household appliance 1000 in the front-rear direction. During the lifting of the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 is greater. The smaller the α angle, the smaller the lifting height of the first shelf 300, and the farther the first shelf 300 is from the housing 200 of the household appliance 1000 in the front-rear direction. During the lifting of the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 is smaller.

[0388] When the α angle is 70°, 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 position of the bottom of the first shelf 300 is higher than that of the second shelf 400), which meets the large height lifting requirement of the first shelf 300 and improves the user experience.

[0389] In some embodiments, as shown in FIG. 42, two of the swing arms 2 are provided, and the two swing arms 2 are staggered to enable the projections of the two swing arms 2 in the vertical plane to be at least partially overlapped when swung to the limit position; when the α angle is 70°, the rotation centers of the two first hinged mounting portions 21 of the two swing arms 2 and the second hinged mounting portion 22 of the two swing arms 2 can be collinearly arranged to meet the large-height lifting requirement of the first shelf 300.

[0390] After the first shelf 300 is lifted to the top limit position and the placing and taking of the articles to be placed in the first shelf 300 is completed, the first shelf 300 needs to be lowered and played back. During the lowering and playback of the first shelf 300, the user needs to apply a driving force to the first shelf 300 to enable the swing arm 2 to swing downward with the first hinged mounting portion 21 as the rotation center, and the α angle affects the force exerted by the user.

[0391] Specifically, when the α angle is large, the force arm of the user pressing the first shelf 300 is small, and a large force needs to be exerted to lower and play back the first shelf 300; when the α angle is small, the force arm of the user pressing the first shelf 300 is large, and a small force needs to be exerted to lower and play back the first shelf 300.

[0392] The α angle needs to consider multiple factors, such as the lifting height of the first shelf 300, the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200, and the force required to lower and play back the first shelf 300. When the α angle is less than 70°, the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 is small, and this factor will not be described in detail later.

[0393] In some embodiments, the α angle can be between 15° and 50°, the first shelf 300 can be lifted to a relatively high suitable position, and the force required to lower and play back the first shelf 300 is moderate.

[0394] The following is described in terms of the α angle, the lifting height of the first shelf 300, and the force required to lower and play back the first shelf 300, and the α angle of 70° is taken as a reference example.

[0395] When the α angle is 15°, the angle is reduced by 55° compared to the reference example, which causes the maximum height that the first shelf 300 can be lifted to be reduced by about 0.7 times, the force arm of the force exerted by the user to press the first shelf 300 is increased by about 1.8 times, the force arm of the force is increased significantly, and the user operates more labor-saving. When the α angle is 15°, the force required for the first shelf 300 to be lifted to an appropriate height position is considered, and in this embodiment, the force required for the first shelf 300 to be played back by falling is smaller, the household appliance 1000 is easier and more convenient to operate, and the user experience is improved.

[0396] When the α angle is 50°, the angle is reduced by 20° compared to the reference example, which causes the maximum height that the first shelf 300 can be lifted to be reduced by about 0.2 times, the force arm of the force exerted by the user to press the first shelf 300 is increased by about 1.2 times, and the height is reduced significantly. The first shelf 300 can be at a relatively large height. When the α angle is 50°, the lifting height of the first shelf 300 is considered, and in this embodiment, the force required for the first shelf 300 to be played back by falling is moderate, and the first shelf 300 can be lifted to a suitable higher position as much as possible, meeting the large height lifting requirement of the first shelf 300.

[0397] In some preferred embodiments, when the α angle is around 25°, the angle is reduced by 45° compared to the reference example, which causes the maximum height that the first shelf 300 can be lifted to be reduced by about 0.6 times, and the height is reduced moderately; the force arm of the force exerted by the user to press the first shelf 300 is increased by about 1.6 times, and the force arm of the force is increased moderately, taking into account the lifting height of the first shelf 300 and the force required for the first shelf 300 to be played back by falling.

[0398] For the span between the first hinge mounting portion 21 and the second hinge mounting portion 22 in the up-down direction when the swing arm 2 is at the upper swing limit position, in an embodiment, please continue to refer to FIG. 42, the rotation centers of the first hinge mounting portion 21 and the second hinge mounting portion 22 on the same swing arm 2 have a span L1 in the up-down direction, and L1 is greater than 0 mm and less than or equal to 235 mm. The larger the span, the higher the first shelf 300 is lifted. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and also considering some interference factors and the structural strength of the swing arm 2, the maximum span of 235 mm is a relatively reasonable value.

[0399] It should be noted that the span can be any integer value between 0 and 235, such as 50mm, 100mm, 150mm, 200mm, 235mm, etc., and 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., and 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, it can also be a span value between 100mm and 150mm, it can also be a span value between 200mm and 235mm, and of course, it can also be some decimal value, all of the above values are within the protection scope of the present application.

[0400] It can be understood that the greater the value of the span L1, the greater the lifting height of the first shelf 300. Under the premise that the limit angle a of the swing arm 2 is unchanged, the arm length of the swing arm 2 needs to be set longer when the first shelf 300 is lifted to a larger height. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a larger external space of the housing 200 of the household appliance 1000.

[0401] When the span L1 is 235mm, as shown in FIG. 42, the first shelf 300 can be lifted to a higher position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than the bottom of the second shelf 400), which meets the lifting requirement of a large height.

[0402] In some embodiments, the value of the span L1 can be between 60mm and 190mm. The following is described with respect to the value of the span L1, the limit swing angle of the swing arm 2 and the length of the swing arm 2, and the value of the span L1 is taken as 235mm and the limit swing angle of the swing arm 2 is taken as 70° as a reference example.

[0403] When the value of the span L1 is 60mm, the span is reduced by about 175mm relative to the reference example, which causes the arm length of the swing arm 2 to be shortened by about 0.7 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a relatively small external space of the housing 200 of the household appliance 1000, thereby saving the use space.

[0404] When the span L1 is 190mm, compared with the reference example, the span is reduced by about 45mm, which results in the arm length of the swing arm 2 being shortened by about 0.2 times, and the height of the first shelf 300 being reduced by about 0.2 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a moderate external space of the housing 200 of the household appliance 1000, and the height of the first shelf 300 is relatively large.

[0405] In some preferred embodiments, when the span L1 is about 100mm, the span is reduced by about 135mm, which results in the arm length of the swing arm 2 being shortened by about 0.5 times, and the maximum height of the first shelf 300 being 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 external space of the housing 200 of the household appliance 1000, saves the use space, and the height of the first shelf 300 is moderate, which meets the lifting demand of a large height.

[0406] It can be understood that the α angle value and the span L1 value are related to each other. When the arm length of the swing arm 2 is unchanged, the α angle value and the span L1 value are positively correlated, that is, the larger the α angle value, the larger the span L1, the greater the height of the first shelf 300 that can be lifted, and the closer the first shelf 300 is to the housing of the household appliance 1000 in the front-rear direction. In the process of lifting the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the housing 200 is greater.

[0407] The α angle value and the span L1 value are positively correlated, that is, the smaller the α angle value, the smaller the span L1, the smaller the height of the first shelf 300 that can be lifted, and the farther the first shelf 300 is from the housing of the household appliance 1000 in the front-rear direction. In the process of lifting the first shelf 300 by the lifting mechanism 100, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the housing 200 is smaller.

[0408] In some embodiments, the α angle value can be between 15° and 50°, and the corresponding span L1 value can be between 60mm and 190mm. For the α angle value and the span L1 value, please refer to the above related descriptions, which will not be repeated here.

[0409] The upper swing limit position of the swing arm 2 defines the upper swing limit position of the swing arm 2. When 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, some embodiments, please continue to refer to FIG. 42, the swing arm 2 has a lower swing limit position corresponding to the bottom of the first shelf 300 to be lifted position, the swing arm 2 has a swing angle defined between the upper swing limit position and the lower swing limit position, the swing angle is obtuse angle, so as to increase the swing angle of the swing arm 2, so that the first shelf 300 can be moved to a higher position, the height of the first shelf 300 is increased, the frequency of bending of the user during use is reduced, and the user experience is improved.

[0410] The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2, and 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 completely the same.

[0411] Please refer to FIG. 42, which shows the lower swing limit position and the upper swing limit position of the swing arm 2. The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. In the embodiment in which the swing arm 2 is provided as two, the swing angles of the two swing arms 2 are set to be the same.

[0412] In the technical solution of the present application, the swing angle is not limited to a specific angle value, and can be an obtuse angle. In some embodiments, please continue to refer to FIG. 42, the swing angle is β, and β is greater than 90° and less than or equal to 160°. The greater the swing angle, the greater the lifting height of the first shelf 300. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum angle of the included angle is set to 160°, which is a more reasonable value.

[0413] It should be noted that the swing angle can be an integer value of 160°, or an arbitrary integer value between 90° and 160°, such as 100°, 110°, 120°, 130°, 140°, 150°, and the like, and of course, it can also be an angle value between any two of the above integers, such as between 90° and 100°, which can be 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, and the like, and it can also be between 100° and 110°; it can also be between 110° and 120°; it can also be between 120° and 130°; it can also be between 130° and 140°; it can also be between 140° and 150°; it can also be between 150° and 160°; and of course it can also be a decimal value, all of the above values are within the protection scope of the present application.

[0414] When the swing arm 2 is in the lower swing limit position, the swing arm 2 can be inclined, 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.

[0415] In the embodiment in which the swing arm 2 enters the accommodating cavity 201 of the household appliance 1000 in an inclined manner, 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 upper and lower directions form an included angle, 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.

[0416] 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 portion 21 and the second hinged mounting portion 22 of the same swing arm 2 is arranged extending along the upper and lower 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.

[0417] Therefore, whether the lower swing limit position of the swing arm 2 enters the accommodating cavity 201 of the household appliance 1000 in an inclined manner or in a vertical state, the swing angle β is set to an obtuse angle, which can ensure that the α angle is greater than 0, compared with the swing arm 2 in a horizontal state, the first shelf 300 can be swung to a larger height, reducing the user's frequent bending in operation and improving the user experience.

[0418] 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 α angle. The larger the value of the α angle, the larger the swing angle β. The lower swing limit position of the swing arm 2 is determined by the angle between the swing arm 2 and the vertical plane. In some embodiments, the larger the angle between the swing arm 2 and the vertical plane, the smaller the swing angle β. Therefore, under the premise that the upper swing limit position of the swing arm 2 is fixed, the swing arm 2 enters in an inclined state to limit the swing angle β, which is smaller than that in a vertical state. Therefore, the following mainly describes the swing arm 2 entering in a vertical state.

[0419] When the value of the β angle is 160°, which corresponds to the value of the α angle being 70°, the first shelf 300 can be lifted to a higher position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than the position of the bottom of the second shelf 400), and at this time, the first shelf 300 is as close as possible to the housing 200 of the household appliance 1000, which meets the requirement of a larger lifting height and reduces the risk of interference of the first shelf 300 during movement.

[0420] After the first shelf 300 is lifted to the top limit position and the objects to be placed are taken out or placed in the first shelf 300, the first shelf 300 needs to be lowered back. During the process of lowering back the first shelf 300, the user needs to apply a driving force to the first shelf 300 to make the swing arm 2 swing downward around the first hinge mounting portion 21 as the center. The value of the β angle determines the value of the α angle. As described above, the value of the β angle also affects the force applied by the user.

[0421] Specifically, when the value of the β angle is large, the force arm of the user pressing the first shelf 300 is small, and the force required to lower back the first shelf 300 is large. When the value of the β angle is small, the force arm of the user pressing the first shelf 300 is large, and the force required to lower back the first shelf 300 is small.

[0422] The value of the β angle needs to consider multiple factors, such as the lifting height of the first shelf 300, the risk of interference of the first shelf 300 with other structures arranged in the upper space of the housing 200, and the force required to lower back the first shelf 300. When the value of the β angle is less than 160°, the risk of interference of the first shelf 300 with other structures arranged in the upper space of the housing 200 is small, and subsequent detailed description will not be made for this factor.

[0423] In some embodiments, the β angle value can be between 105° to 140°, the first shelf 300 can be lifted to a suitable higher position, and the force required to drop the first shelf 300 back is moderate.

[0424] The following is described in terms of the β angle value, the lifting height of the first shelf 300, and the force required to drop the first shelf 300 back, and the β angle value of 160° is taken as a reference example.

[0425] When the β angle value is 105°, the angle is reduced by 55° compared to the reference example, resulting in a decrease of about 0.7 times in the maximum height that the first shelf 300 can be lifted to, and the force arm of the user's pressing force on the first shelf 300 increases by about 1.8 times. The force arm increases significantly, and the user's operation is more labor-saving. When the β angle value is 105°, the force required to drop the first shelf 300 back is considered more, and in this embodiment, the first shelf 300 can be lifted to a suitable high position, and the force required for the user to drop the first shelf 300 back is small, making it easier and more convenient to operate the household appliance 1000, and improving the user experience.

[0426] When the β angle value is 140°, the angle is reduced by 20° compared to the reference example, resulting in a decrease of about 0.2 times in the maximum height that the first shelf 300 can be lifted to, and the force arm of the user's pressing force on the first shelf 300 increases by about 1.2 times. The height decreases significantly, and the first shelf 300 can be at a relatively large height. When the β angle value is 140°, the lifting height of the first shelf 300 is considered more, and in this embodiment, the force required to drop the first shelf 300 back is moderate, and the first shelf 300 can be lifted to a suitable higher position as much as possible, meeting the large height lifting requirement of the first shelf 300.

[0427] In some preferred embodiments, when the β angle value is around 115°, the angle is reduced by 45° compared to the reference example, resulting in a decrease of about 0.6 times in the maximum height that the first shelf 300 can be lifted to, and the height decreases moderately; the force arm of the user's pressing force on the first shelf 300 increases by about 1.6 times, and the force arm increases moderately, taking into account the lifting height of the first shelf 300 and the force required to drop the first shelf 300 back.

[0428] In an embodiment, referring to FIG. 32, FIG. 36, FIG. 41, and FIG. 48, the lifting mechanism 100 further comprises a first guide rail 4, which comprises a plurality of slide rails connected to each other in a telescopic manner, and the plurality of slide rails at least comprises a first slide rail 41 and a second slide rail 42, the first slide rail 41 is connected to the connecting piece, and the second 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 the bottom storage position and the bottom lifting position, and through the telescopic movement of the first guide rail 4, the positional relationship between the first shelf 300 and the connecting piece can be adjusted, so that the first shelf 300 can be moved to the bottom storage position and stored in the accommodating cavity 201.

[0429] After the lifting mechanism 100 lifts the first shelf 300 to a suitable position, it is necessary to lock the first shelf 300 to prevent the first shelf 300 from falling back under the action of gravity without human intervention, so as to reduce the user experience. In some embodiments, referring to FIG. 48-23, the lifting mechanism 100 further comprises a locking structure 5, which is used to relatively lock the swing arm 2 and the first shelf 300 after the first shelf 300 is lifted, that is, the first shelf 300 is locked by the locking structure 5, so that the swing arm 2 and the first shelf 300 are relatively locked in rotation. During use by the user, the swing arm 2 and the first shelf 300 remain in a relatively locked state of rotation, except for being unlocked by the user. In this way, the user can operate very conveniently when taking and placing the objects to be placed, and the user experience is better.

[0430] In the embodiment in which the first shelf 300 is relatively locked to the swing arm 2, the first shelf 300 can be locked in the front-back direction, such as front-pull locking or rear-push locking. The first shelf 300 moves upward and forward during the swing movement of the swing arm 2, and therefore, the front-pull locking is more in line with the user's usage habit.

[0431] In an embodiment, the lifting mechanism 100 further comprises a connecting piece, and the locking structure 5 comprises a locking piece 5a which can be movably mounted relative to the connecting piece in the front-back direction, and the locking piece 5a is used to be mounted on the first shelf 300.

[0432] It should be noted that in the forward-pulling locking mode, the first shelf 300 is forwardly movable relative to the swing arm 2, that is, when the first shelf 300 is at the top lifting limit position, the first shelf 300 continues to move forward to correspond to the top locking position, and the first shelf 300 has a horizontal distance difference between the top lifting limit position and the top locking position, which are two different positions.

[0433] The sliding fit structure is provided between the locking member 5a and the swing arm 2, and the sliding fit structure is slidably fitted during the forward movement of the locking member 5a relative to the connecting member, so that the first shelf 300 can move from the top lifting limit position to the top locking position, and the forward-pulling locking of the first shelf 300 can be achieved through the cooperation of the sliding fit structure, without the need for additional complex locking and unlocking mechanisms, and the user operation is more convenient.

[0434] In the technical solution of the present application, the specific structure of the sliding fit structure is not limited, for example, two structures that cooperate with each other, one of which can be a shaft, and the other of which can be a rib or a groove, or a cooperation mode in which part of the structure is a rib and part of the structure is a groove.

[0435] In an embodiment, please refer to FIGS. 48-23, the sliding fit structure includes a cooperating sliding groove and a sliding shaft that slidably cooperate with each other. At least one of the cooperating sliding grooves includes a horizontal groove segment 5111 extending in the front-rear direction, and the sliding shaft can be slid into the horizontal groove segment 5111 to stop the swing of the swing arm 2 when the locking member 5a moves forward relative to the connecting member.

[0436] The horizontal groove segment 5111 has an upper groove wall and a lower groove wall in the up-down direction, and the sliding shaft abuts against the upper groove wall or the lower groove wall to limit the up-down movement, at which time the swing arm 2 is stopped, and the first shelf 300 is locked relative to the swing arm 2. The sliding fit structure and the sliding shaft cooperate to achieve sliding locking, without the need for additional mechanisms, and the structure is simple. In addition, the structure also conforms to the user's operation habit and improves the user experience.

[0437] The present application does not limit the specific positions of the sliding shaft and the cooperating sliding groove, for example, the sliding shaft can be arranged on the swing arm 2, and the cooperating sliding groove can be arranged on the locking member 5a; or the sliding shaft can be arranged on the locking member 5a, and the cooperating sliding groove can be arranged on the swing arm 2.

[0438] In an embodiment, the matching sliding groove can be the horizontal groove segment 5111, and the sliding shaft is located at the front end slot of the horizontal groove segment 5111 when the swing arm 2 is at the upper swing limit position, and the sliding shaft slides backward into the horizontal groove segment 5111 when the locking member 5a is pulled forward.

[0439] In an embodiment, the matching sliding groove further comprises an arc-shaped groove segment 5112, and the extension path of the arc-shaped groove segment 5112 is adapted to the rotation of the sliding shaft, that is, the sliding shaft is located in the arc-shaped groove segment 5112 during the entire swing stroke of the swing arm 2, thereby improving the stability of the swing arm 2 during swing.

[0440] The matching sliding groove can be arranged on the locking member 5a or the swing arm 2. In an embodiment, the matching sliding groove is arranged on the locking member 5a, and the sliding matching structure is provided in two groups, the sliding shafts of the two groups of sliding matching structures are arranged on the same swing arm 2, and the matching sliding grooves of the two groups of sliding matching structures are arranged on the locking member 5a. By arranging the two groups of sliding matching structures, the stability of the first shelf 300 is improved.

[0441] Since the positions of the sliding shafts of the two groups of sliding matching structures relative to the second hinge mounting portion 22 are different, the corresponding rotation radii and the corresponding rotation arc-shaped trajectories are also different, and the trajectory lines formed on the same locking member 5a are different.

[0442] Specifically, the two sliding shafts comprise a first sliding shaft 513 adjacent to the second hinge mounting portion 22 and a second sliding shaft 514 away from the second hinge mounting portion 22.

[0443] The two matching sliding grooves comprise a first matching sliding groove 511 corresponding to the first sliding shaft 513 and a second matching sliding groove 512 corresponding to the second sliding shaft 514. The guide inlet of the first matching sliding groove 511 is arranged on the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged on the front side end of the locking member 5a. By guiding at different positions, the stability of the first shelf 300 during lifting is better.

[0444] The guide inlet of the first matching sliding groove 511 is arranged at the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged at the front side end of the locking member 5a. The first sliding shaft 513 and the second sliding shaft 514 are respectively and correspondingly matched and installed, and correspondingly to the swinging of the swing arm 2 between the lower swing limit position and the upper swing limit position, the first sliding shaft 513 and the second sliding shaft 514 stagger to perform similar horizontal sliding and upward and downward direction sliding, so that the first shelf 300 is in a stable state.

[0445] The first shelf 300 is connected with the locking member 5a, so that the first shelf 300 can move linearly along the front and back directions relative to the connecting member. As described above, the first guide rail 4 is arranged between the connecting member and the locking member 5a. The relative movement between the first sliding rail 41 and the tail sliding rail 42 of the first guide rail 4 can realize the linear movement of the first shelf 300 relative to the connecting member along the front and back directions.

[0446] In the embodiment in which two swing arms 2 are arranged, the locking structure 5 described above can be arranged on both of the swing arms 2. Two locking structures 5 are arranged to lock the two swing arms 2 respectively, so that the locking of the first shelf 300 at the top locking position is more reliable, and the risk of falling by itself is reduced.

[0447] In an embodiment, the locking structure 5 only allows one of the swing arms 2 and the first shelf 300 to be relatively rotationally stopped, and any one of the two swing arms 2 can be used.

[0448] In order to ensure the stability of the lifting mechanism 100 during lifting of the first shelf 300, the lifting mechanism 100 adopts a four-bar linkage mechanism, that is, adopts the form of the fixed arm 1, the two swing arms 2 and the connecting member. The four-bar linkage mechanism is arranged as a parallelogram linkage mechanism, so that the installation positions of the two swing arms 2 on the fixed arm 1 can be one above the other. In an embodiment, when the two swing arms 2 are both at the lower swing limit position, the two swing arms 2 include a first swing arm 2a on the left side and a second swing arm 2b on the right side. The installation position of the first swing arm 2a on the fixed arm 1 is lower, and the installation position of the second swing arm 2b on the fixed arm 1 is higher.

[0449] For the two sliding shafts, both are arranged on the second swing arm 2b. Thus, when the second swing arm 2b corresponds to the upper swing limit position, the upper end of the second swing arm 2b is higher than the upper end of the first swing arm 2a, so that the second swing arm 2b and the locking member 5a arranged on the shelf can be matched and locked.

[0450] In addition, it should be noted that in the household appliance 1000, two lifting mechanisms 100 are arranged and are spaced apart in the left-right direction, i.e., two support points are formed on both sides of the first shelf 300 in the left-right direction, and the two lifting mechanisms 100 can stably lift the first shelf 300.

[0451] Of course, in the embodiment in which two lifting mechanisms 100 are arranged, the swing arm 2 can correspondingly be provided with two or four swing arms to jointly support the first shelf 300.

[0452] In the lifting mechanism 100, a damping structure such as a gas strut or a spring can be arranged between the swing arm 2 and the fixed arm 1 to reduce the force exerted by the user during lifting or lowering of the first shelf 300.

[0453] The specific structure of the household appliance 1000 will be described in detail below in combination with some features of the lifting mechanism 100.

[0454] The household appliance 1000 comprises a housing 200, the housing 200 is formed with a receiving cavity 201, and the front side of the housing 200 is further provided with an opening, and a door body is arranged at the opening. The door body is opened to an appropriate position to open the opening. At this time, the user can pull out the first shelf 300, and under the cooperation of the lifting mechanism 100, the first shelf 300 is lifted and extends out of the receiving cavity 201 to take out or put in the articles to be placed.

[0455] The receiving cavity 201 has a rear wall opposite to the opening and two side walls on both sides of the rear wall. The fixed arm 1 is fixed to the side wall, and the swing arm 2 of the lifting mechanism 100 is articulated at the connecting position of the side wall to move in and out of the receiving cavity 201 to lift the first shelf 300.

[0456] Correspondingly, in the household appliance 1000, the first shelf 300 can have a bottom lifting position and a top lifting limit position. In the embodiment in which the first shelf 300 can move forward and backward relative to the connecting piece, the first shelf 300 can have a bottom storage position, a bottom lifting position, and a top lifting limit position. In the embodiment in which the first shelf 300 can move forward relative to the connecting piece and be locked, the first shelf 300 can have a bottom storage position, a bottom lifting position, a top lifting limit position, and a top locking position.

[0457] In some household appliances 1000, only one shelf is provided, two shelves are provided, and more shelves are provided. In the technical solution of the present application, please refer to FIG. 44 and FIG. 45, a second shelf 400 is further provided in the accommodating cavity 201. Corresponding to the top lifting limit position, the lower end of the first shelf 300 protrudes upward from the lower end of the second shelf 400. That is, at the lifting limit position of the first shelf 300, the lifting height of the first shelf 300 is higher than that of the second shelf 400. At this time, the lifting height is larger, the frequency of bending over by the user is reduced, and the user experience is improved.

[0458] It should be noted that in the embodiment in which two shelves are provided 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 at 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 is arranged oppositely.

[0459] In view of the above-mentioned embodiments, the user needs to alternately use the first shelf 300 and the second shelf 400, that is, when the first shelf 300 is lifted, the second shelf 400 is kept in the accommodating cavity 201 as much as possible; when the second shelf 400 is used, the first shelf 300 is kept in the accommodating cavity 201 as much as possible, or the second shelf 400 is not lifted as much as possible.

[0460] Of course, for the upper end of the first shelf 300 and the upper end of the second shelf 400, in an embodiment, corresponding to the top lifting limit position and the top lifting locking position of the first shelf 300, the upper end of the first shelf 300 protrudes upward from the upper end of the second shelf 400. That is, under the premise that the depths of the first shelf 300 and the second shelf 400 are consistent, the first shelf 300 can be at a higher position.

[0461] Corresponding to the product in which the household appliance 1000 is a dishwasher, the first shelf 300 corresponds to the lower basket of the dishwasher, and the second shelf 400 corresponds to the upper basket of the dishwasher. When the lower basket of the dishwasher is used, the lifting mechanism 100 lifts the lower basket of the dishwasher to a position higher than the upper basket. This state has the same operation height as when the user uses the upper basket of the dishwasher, or a higher height, and the user's operation experience will be better.

[0462] The following describes the user's use of the household appliance 1000 in relation to the structure of the household appliance 1000, with reference to the first shelf 300:

[0463] 1. The first shelf 300 is in the bottom storage position, as shown in FIGS. 30-33:

[0464] This state is a state in which the user is not using, or has just started using, or has finished using the first shelf 300. In these states, the first shelf 300 is in the containing cavity 201 of the household appliance 1000. As can be seen from FIGS. 30-33, the first shelf 300 is stored in the containing cavity 201. At this time, the distance between the first section of slide rail 41 and the tail section of slide rail 42 of the first guide rail 4 is the smallest or the distance of overlap is the largest, and the swing arm 2 is at the lower swing limit position.

[0465] 2. The first shelf 300 is in the bottom position to be lifted, as shown in FIGS. 34-38:

[0466] This state is a state in which the user pulls the first shelf 300 out of the containing cavity 201, or lowers the first shelf 300 after use. In these states, the first shelf 300 is at the opening of the containing cavity 201. As can be seen from FIGS. 34-38, at this time, the distance between the first section of slide rail 41 and the tail section of slide rail 42 of the first guide rail 4 is relatively large or the distance of overlap is relatively small, and the first shelf 300 moves forward relative to the containing cavity 201 by a distance, and the swing arm 2 is still at the lower swing limit position.

[0467] 3. The first shelf 300 is in the top lifting limit position, as shown in FIGS. 39-45:

[0468] This state is a state in which the user lifts the first shelf 300, or exits the locking after use. In these states, the first shelf 300 is at the maximum height of lifting. As can be seen from FIGS. 39-45, at this time, the distance between the first section of slide rail 41 and the tail section of slide rail 42 of the first guide rail 4 is relatively large or the distance of overlap is relatively small, and the distance or the distance of overlap relative to the first shelf 300 in the bottom position to be lifted is unchanged, and the swing arm 2 is at the upper swing limit position.

[0469] 4. The first shelf 300 is in the top locking position, as shown in FIGS. 46-50:

[0470] This state is a locking state after the user lifts the first shelf 300, and the user can take and place the items to be placed in this state. In these states, the first shelf 300 is at the maximum height of the lift, and as can be seen from Figures 46-50, the distance between the first guide rail 4 and the first guide rail 4 is the maximum or the minimum distance, and the first shelf 300 is in the top locking position relative to the top lifting limit position. The swing arm 2 is still in the upper swing limit position.

[0471] The following describes a complete use process of the user:

[0472] When the user needs to use the household appliance 1000, first open the door of the household appliance 1000, and the user pulls the first shelf 300 out of the containing cavity 201 to the bottom lifting position from the bottom storage position; under the 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 locking state, the user can take and place the items to be placed in the first shelf 300 under the condition of reducing the frequency of bending over;

[0473] When the user finishes taking and placing the items to be placed, the user pushes the first shelf 300 backward to unlock the first shelf 300 and move from the top unlocking position to the top lifting limit position; the user lowers the first shelf 300 to move from the top lifting limit position to the bottom lifting position; the user continues to push the first shelf 300 backward to move from the bottom lifting position to the bottom storage position. When the first shelf 300 is in the bottom storage position, the user can close the door and complete the use of the household appliance 1000.

[0474] In household appliances with internal space, movable storage structures such as shelves that can be extended from the interior of the household appliance are usually configured. Some movable storage structures in the prior art have a pull-out function and also have a lifting function.

[0475] In some household appliances, the shelf is usually arranged at the bottom of the household appliance, and during use, such as taking and placing tableware and other operations, frequent bending is required. In order to reduce the frequency of bending during the use of the shelf, the prior art uses a lifting mechanism to lift the shelf for use, which can reduce the frequency of bending. However, the existing lifting mechanism makes the lifting height of the shelf relatively low, and the user still needs to bend frequently during use, resulting in poor user experience.

[0476] Therefore, the household appliance provided in the present application can lift the shelf to a higher height, reduce the frequent bending of the user during operation, and improve the user experience. FIGS. 51-72 are structural schematic diagrams of the household appliance provided in the present application.

[0477] Please refer to FIGS. 51-52, the present application provides a household appliance 1000, which can be a dishwasher, an oven, an oven, a refrigerator, etc. The household appliance 1000 includes a housing 200, the housing 200 forms an accommodating cavity 201, a first shelf 300 is connected to the accommodating cavity 201 by a lifting mechanism 100, and the first shelf 300 is provided with a utensil to be placed, such as a bowl, a dish, a plate, a chopstick, a knife and fork, etc. Tableware, and also can be baked food or cold storage goods, etc.

[0478] In the present application, the user is used as the direction reference, forward is the direction towards the user, or towards the side of the household appliance 1000 provided with a door; backward is the direction opposite to the forward direction, specifically the direction away from the user, and the up-down direction is the direction with gravity as the reference.

[0479] It should be noted that in some household appliances 1000, there is only one shelf, such as the first shelf 300. There are also multiple shelves, and in the embodiment of the household appliance 1000 provided with multiple shelves, two shelves can be provided, such as the first shelf 300 and the second shelf 400. When the two shelves have a position relationship in the up-down direction, they can be referred to as upper and lower shelves. In the description of the embodiments of the present application, the first shelf 300 corresponds to the lower shelf, and the second shelf 400 corresponds to the upper shelf.

[0480] For the first shelf 300, it needs to be moved out of the accommodating cavity 201 of the household appliance 1000, then lifted to a suitable position, and finally locked to the suitable position. Specifically, after the door body of the household appliance 1000 is opened, the user needs to put or take the objects to be placed in or out of the first shelf 300. The user often pulls the first shelf 300 forward. During the movement of the first shelf 300, a combined movement process occurs, that is, the first shelf 300 moves forward and upward at the same time. At this time, the lifting mechanism 100 moves and supports the first shelf 300.

[0481] The first shelf 300 has several important positions during its movement. Commonly, there are a bottom storage position (as shown in FIGS. 51 and 52), a bottom to-be-lifted position (as shown in FIGS. 55 and 56), a top lifting limit position (as shown in FIGS. 60 and 61), and a top locking position (as shown in FIGS. 68 and 69).

[0482] In an embodiment, the first shelf 300 can have only two positions, that is, the bottom to-be-lifted position and the top lifting limit position. The first shelf 300 can also have three positions, that is, the bottom storage position, the bottom to-be-lifted position, and the top lifting limit position. At this time, the top lifting limit position and the top locking position of the first shelf 300 can be the same position. The first shelf 300 can also have four positions, that is, the bottom storage position, the bottom to-be-lifted position, the top lifting limit position, and the top locking position. At this time, the top lifting limit position and the top locking position of the first shelf 300 are different positions.

[0483] For the lifting mechanism 100, the lifting mechanism 100 mainly realizes the lifting of the first shelf 300. The action of the lifting mechanism 100 can correspond only to the bottom to-be-lifted position and the top lifting limit position of the first shelf 300.

[0484] The lifting mechanism 100 in the household appliance 1000 usually adopts a linkage mechanism, that is, the lifting of the first shelf 300 is realized by a single linkage or a combination of several linkages. In the embodiment with only one linkage, the linkage can be provided as a swing arm 2, two ends of the swing arm 2 are respectively formed with a first hinged mounting portion 21 and a second hinged mounting portion 22, the first hinged mounting portion 21 is hinged in the accommodating cavity 201 of the housing 200 of the household appliance 1000, and the second hinged mounting portion 22 is directly or indirectly connected to the first shelf 300. In addition, the swing of the swing arm 2 can be assisted by other support structures, and of course, a plurality of linkage mechanisms can also be provided on both sides of the first shelf 300, that is, two swing arms 2 are provided on both sides of the first shelf 300 to realize the swing, so that the single swing arm 2 can lift the first shelf 300 in the swing stroke.

[0485] In the combination of a plurality of linkages, a four-linkage mechanism is usually adopted, and in the four-linkage mechanism, two of the linkages can be provided as swing arms 2, that is, the lifting of the first shelf 300 is realized by the form of double swing arms 2, so that the stability of the first shelf 300 in the lifting process is better, which will be described in detail in subsequent embodiments.

[0486] 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 shelf 300 has only a bottom storage position and a top lifting limit position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position.

[0487] When the first shelf 300 has a bottom storage position, a bottom lifting standby position, and a top lifting limit position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position and the bottom lifting standby position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position.

[0488] When the first shelf 300 has a bottom storage position, a bottom lifting standby position, a top lifting limit position, and a top locking position, the swing arm 2 is at the lower swing limit position, and the corresponding first shelf 300 is at the bottom storage position and the bottom lifting standby position; when the swing arm 2 is at the upper swing limit position, the corresponding first shelf 300 is at the top lifting limit position and the top locking position.

[0489] It should be noted that the first hinged mounting portion 21 of the swing arm 2 is a fixed hinged point, the position of which does not change, and the swing movement of the swing arm 2 only indicates the movement of the movable hinged point of the swing arm 2, i.e., the movement of the 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 referenced to the movable end of the swing arm 2, i.e., 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, and 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.

[0490] In the scheme for achieving the large height lifting of the shelf of the household appliance 1000, after the shelf is lifted to the top lifting limit position, the user takes and places the articles to be placed in the shelf, and after the user finishes using, the shelf also needs to be returned to the inside of the household appliance 1000. In the process of returning the shelf, the performance of the lifting mechanism 100 needs to be determined to make the user operation more convenient and labor-saving.

[0491] In some embodiments, referring to FIG. 64, two swing arms 2 are provided in the lifting mechanism 100, the swing arms 2 have an upper swing limit position, so that the first shelf 300 can be at the top lifting limit position, at the upper swing limit position, the included angle between the line connecting the rotation centers of the first hinged mounting portion 21 and the second hinged mounting portion 22 on the same swing arm 2 and the line connecting the rotation centers of the two second hinged mounting portions 22 of the two swing arms 2 is γ, and 0°<γ<90°.

[0492] In the technical scheme of the present application, at the upper swing limit position, the included angle between the line connecting the rotation centers of the first hinged mounting portion 21 and the second hinged mounting portion 22 on the same swing arm 2 and the line connecting the rotation centers of the two second hinged mounting portions 22 of the two swing arms 2 is γ, and 0°<γ<90°, so that, under the premise of considering the maximum height at which the first shelf 300 can swing, the user operation is more convenient and labor-saving, and the user experience is improved.

[0493] The greater the included angle between the swing arm 2 and the horizontal direction, the smaller the included angle γ, and at this time, the user needs to exert greater force to press down the first shelf 300 to make it fall back; the smaller the included angle between the swing arm 2 and the horizontal direction, the greater the included angle γ, and at this time, the user needs to exert less force to press down the first shelf 300 to make it fall back, and the customer experience is more comfortable.

[0494] At the two limit positions of the swing arms 2, the swing arms 2 can swing to the angle extreme, in which case the included angle γ is 0; when the two swing arms 2 are in the horizontal state, the included angle γ is 90°. Considering the swing angle of the swing arms 2 and the force of the user pressing the first shelf 300 to make it fall back, it is a reasonable choice to set the included angle γ between 0° and 90°.

[0495] It should be noted that the included angle γ can be any integer value between 0° and 90°, such as 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc. Of course, it can also be an angle value between any two of the above integers, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, etc. between 0° and 10°, between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°, between 60° and 70°, between 80° and 90°, and of course, it can also be some decimal degree value. The above values are within the scope of the present application.

[0496] In some embodiments, the included angle γ is set between 30° and 90°, such as 30°, 90°, or any integer value between 30° and 90°. In some embodiments, the included angle γ is set between 30° and 60°, such as 30°, 60°, or any integer value between 30° and 60°.

[0497] The following is described in terms of the γ angle value, the lifting height of the first shelf 300, and the force required to drop and play back the first shelf 300, and the γ angle value of 90° is taken as a reference example.

[0498] When the included angle γ is set to 30°, the angle of the γ angle is reduced by 60° relative to the reference example, the force arm of the force required to drop and play back the first shelf 300 is reduced by about 0.3 times, the force arm is reduced significantly, and the first shelf 300 is directly lifted from the horizontal state to the inclined upward state. When the γ angle value is 30°, the lifting of the first shelf 300 is considered more. In this embodiment, the swing angle of the swing arm 2 is larger, which can make the first shelf 300 have a larger lifting height.

[0499] When the included angle γ is set to 60°, the angle of γ is reduced by 30° compared with the reference example, the force arm of the force required by the user to drop back the first shelf 300 is reduced by about 0.1 times, the force arm of the force is reduced smaller, the force required by the user to drop back the first shelf 300 is considered more, in this embodiment, the first shelf 300 can be lifted to a suitable height position, the user needs to drop back the first shelf 300 with smaller force, the household appliance 1000 is easier and more convenient to operate, and the user experience is improved.

[0500] In some preferred embodiments, the γ angle is near 45°, the angle is reduced by 45° compared with the reference example, the maximum height of the first shelf 300 that can be lifted is moderate; the force arm of the force required by the user to drop back the first shelf 300 is reduced by about 0.2 times, the force arm of the force is moderate, and the lifting height of the first shelf 300 and the force required by the user to drop back the first shelf 300 are considered.

[0501] In the process of lifting the first shelf 300, in order to improve the user experience in the process of lifting the shelf, a damping member 6 is generally provided, the damping member 6 can be stretched and contracted itself, so as to convert potential energy into kinetic energy in the process of lifting the first shelf 300, and the labor-saving effect is achieved.

[0502] In some embodiments, at the upper swing limit position, the two swing arms 2 include a first swing arm 2a below and a second swing arm 2b above, one end of the first swing arm 2a provided with the first hinged mounting portion 21 is provided with an extension portion 24, and the third hinged mounting portion 23 is arranged on the extension portion 24.

[0503] The lifting mechanism 100 further comprises a damping member 6, one end of the damping member 6 is connected to the third hinged mounting portion 23, and the other end is hinged to the fixed arm 1.

[0504] By arranging the damping member 6 between the first swing arm 2a and the fixed arm 1, the kinetic energy of the first shelf 300 in the lifting process is converted into potential energy of the damping member 6, the user is more labor-saving in the operation process, and the user experience is improved.

[0505] It should be noted that the specific implementation form of the damping member 6 is not limited, which can be air support, compression spring, etc.

[0506] The length of the extension portion 24 and the included angle between the extension portion 24 and the first swing arm 2a determine the setting position of the third hinged mounting portion 23, and further determine the labor-saving characteristics of the whole lifting mechanism 100.

[0507] In some embodiments in which the angle between the extension 24 and the first swing arm 2a is considered, please refer to FIG. 64, in the first swing arm 2a, the rotation centers of the first and second hinged mounting portions 21 and 22 form a first line, the rotation centers of the first and third hinged mounting portions 21 and 23 form a second line, the angle between the first and second lines is θ, and 95°≤θ≤180°.

[0508] By limiting the angle θ between 95° and 180°, when the first swing arm 2a is at the upper swing limit position, the extension 24 of the first swing arm 2a can be closer to the hinged point connecting the damping member 6 and the fixed arm 1, so that the length of the damping member 6 is shorter, thereby providing greater support force and improving the long-term reliability of the damping member 6.

[0509] It should be noted that the angle θ can be any integer value between 95° and 180°, such as 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, etc. Of course, it can also be an angle value between any two of the above integers, such as between 95° and 100°, which can be 96°, 97°, 98°, 99°, etc. It can also be between 10° and 20°, between 100° and 110°, between 110° and 120°, between 120° and 130°, between 130° and 140°, between 140° and 150°, between 150° and 160°, between 160° and 170°, between 170° and 180°, and of course, it can also be some decimal degree values. The above values are within the scope of the present application.

[0510] The existing angle θ between the first and second lines is generally set to 90°. By increasing the setting value of the angle θ, while keeping the distance between the first and third hinged mounting portions 21 and 23 unchanged, when the swing arm 2 is at the upper swing limit position, the first hinged mounting portion 21 of the swing arm 2 can be closer to the damping member 6, thereby making the length of the damping member 6 smaller, allowing it to provide greater support force and improve its long-term reliability.

[0511] The angle θ between the first and second lines cannot be too large. When θ is greater than 180°, increasing θ will increase the length of the damping member 6. Therefore, the angle θ is set to be within 180° to avoid the length of the damping member 6 being too long.

[0512] The range of the value of θ is further explained in the embodiments of the present application as follows:

[0513] In an embodiment of the present application, 95°≤θ≤165°. The selection of "95°≤θ≤165°" is based on the following consideration for further optimization, which is analyzed in detail as follows.

[0514] Based on the above embodiment of 95°≤θ≤165°, the following refined embodiments exist.

[0515] The first refined embodiment: 95°≤θ<136°, for example, 95°, 100°, 110°, etc. At this time, the length of the damping member 6 is smaller than the length of the existing damping member when the swing arm 2 is at the upper swing limit position, so that a greater support force can be provided, and the first shelf 300 is lifted higher. The length of the damping member 6 is relatively long at this time, and the support force that can be provided is limited, and the stability of the first shelf 300 supported is not particularly good.

[0516] The second refined embodiment: 165°≥θ≥136°. Without changing the selection of the damping member 6, even if the height of the first shelf 300 at the upper swing limit position is raised, θ is greater than or equal to 136°, which can make the length of the damping member 6 shorter, provide sufficient support force, and make the first shelf 300 be supported better.

[0517] The third refined embodiment: 145°<θ≤165°, for example, 146°, 150°, 155°, etc. At this time, the length of the damping member 6 is much larger than the length of the existing damping member when the swing arm 2 is at the upper swing limit position, so that a greater support force can be provided, and the first shelf 300 is supported stably. The damping member 6 occupies more space and is prone to interference with other components.

[0518] The fourth refined embodiment: 95°≤θ≤145°. The damping member 6 occupies less space upward, and the probability of interference between the swing arm 2 and other components during upward swinging is reduced.

[0519] The fifth refined embodiment: 136°≤θ≤145°. At this time, θ is much greater than 90°, and the length of the damping member can be greatly reduced when the swing arm 2 is at the upper swing limit position, so that it can provide a greater support force. θ≤145° can also avoid the damping member 6 occupying too much space upward, and avoid interference between the swing arm 2 and other components during upward swinging.

[0520] In some embodiments, the included angle θ is defined between 95° and 160°, so that the damping member 6 can play a good auxiliary role in the lifting or falling process of the first shelf 300, so that the structure of the lifting mechanism 100 is more optimized, the user is more convenient in using the first shelf 300, and the user experience is improved.

[0521] In some embodiments considering the length factor of the extension 24, please refer to FIG. 64, the distance between the third hinged mounting portion 23 and the first hinged mounting portion 21 in the first swing arm 2a is L6, 20mm≤L6≤170mm.

[0522] By setting the distance L6 to a value between 20mm and 170mm, when the first swing arm 2a is at the position where the extension 24 is collinear with the damping member 6, the length of the extension 24 is reduced, the length of the damping member 6 is increased, thereby reducing the maximum compression amount of the damping member 6, ensuring the service life and long-term stability of the damping member 6, and under the premise that other conditions remain unchanged, when the first swing arm 2a is at the upper swing limit position, the length of the damping member 6 can also be increased, thereby providing greater support force.

[0523] When the distance from the third hinged mounting portion 23 to the first hinged mounting portion 21 is greater than 170mm, on the one hand, it will cause the length of the damping member 6 to be smaller, the support force provided to be smaller, and when the first hinged mounting portion 21, the third hinged mounting portion 23 and the fourth hinged mounting portion are at the collinear position, it will also cause the compression amount of the damping member 6 to be too large. On the other hand, the distance space between the first shelf 300 and the second shelf 400 is limited, resulting in that the stroke of the damping member 6 cannot be considered both the maximum stroke and the minimum stroke.

[0524] It should be noted that the distance L6 can be any integer value between 20mm and 170mm, such as 20mm, 50mm, 80mm, 110mm, 140mm, 170mm, etc. Of course, it can also be a value between any two of the above integers, such as a value between 20mm and 50mm, which can be 30mm, 40mm, etc. It can also be a value between 30mm and 40mm, a value between 40mm and 50mm, a value between 50mm and 60mm, etc. Of course, it can also be a decimal value. The above values are within the protection scope of the present application.

[0525] In some embodiments, the distance L6 is set to a value between 20mm and 100mm, and when L6 is less than or equal to 100mm, the length of the damping member 6 can be made smaller when the first swing arm 2a is in the upper swing limit position, so that the damping member 6 has a larger compression amount and can provide more support force, thereby ensuring the effect of stopping the first swing arm 2a from swinging downward at the upper swing limit position.

[0526] The movement trajectory of the third hinged mounting portion 23 of the extension portion 24 is a circular swing around the first hinged mounting portion 21 as the center. When a tangential force is applied to the extension portion 24, the extension portion 24 can be better driven to rotate or stop rotating, and thus when the swing arm 2 is in the upper swing limit position, the damping member 6 stops the swing arm 2 from rotating by the force output by itself, and correspondingly, the force of the damping member 6 on the extension portion 24 of the swing arm 2 is decomposed into two components, one of which is in the extension direction of the extension portion 24, and the other is in a direction perpendicular to the extension direction of the extension portion 24, and the size of the other component determines the acceleration of the extension portion 24, thereby achieving the rotation or stop of the extension portion 24.

[0527] In order to better stop the swing arm 2, referring to FIGS. 73 and 74, the included angle x between the damping member 6 and the extension portion 24 of the swing arm 2 is 80°≤x≤100°, and when the included angle x is less than 80° or greater than 100°, the force of the damping member 6 on the extension portion 24 of the swing arm 2 has a larger component in the extension direction of the extension portion 24 and a smaller component in a direction perpendicular to the extension direction of the extension portion 24, and the effect of stopping the swing arm 2 at the upper swing limit position is poor. Preferably, x is 90°, and at this time, the component in the extension direction of the extension portion 24 is 0, and the stopping effect is the best.

[0528] When L6 is 100mm, and other conditions remain unchanged, the value of X is about 75°, which is greater than the existing angle, and at this time, compared with the existing scheme, X is closer to 90°, so that the tangential component of the damping member 6 is larger, and the support effect of the first shelf 300 at the upper limit position is better.

[0529] Based on the above 20mm≤L6≤100mm, the following sub-embodiments exist:

[0530] The first subdivision embodiment: 70mm < L6≤100mm, when L6 is 70mm, the corresponding X is about 80°, at this time, the corresponding is 75°≤X<80°, at this time, when the swing arm 2 is in the upper swing limit position, the length of the damping member 6 is shorter than the existing one, the damping member 6 can output greater force, and the included angle X is larger than the existing one, closer to 90°, correspondingly, the component force of the damping member 6 in the tangential direction is larger, the component force in the extension direction of the extension part 24 is smaller, and the rotation stopping effect on the swing arm 2 is better than the existing scheme.

[0531] The second subdivision embodiment: 20mm≤L6≤70mm, at this time, the corresponding is 80°≤X≤100°, when L6 takes the value of 20mm, at this time, the corresponding X is about 100°, when L6 takes the value of 70mm, at this time, the corresponding X is about 80°, at this time, compared with the first subdivision embodiment, X is closer to 90°, the component force of the damping member 6 in the tangential direction is larger, the component force in the extension direction of the extension part 24 is smaller, and the rotation stopping effect on the swing arm 2 is better than the scheme of the first subdivision embodiment.

[0532] More specifically, when X is 90°, at the upper swing limit position, the length of the damping member 6 is the shortest, and the component force in the tangential direction is the largest, at this time, the rotation stopping effect on the swing arm is the best, and through numerous experiments, it is found that when L6 is 48mm, X can be approximately 90°, at this time, the rotation stopping effect on the swing arm is the best.

[0533] The household appliance 1000 in the present application 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 can be, the higher the first shelf 300 is lifted, and vice versa, the lifting height is relatively small; the second 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, on the basis of being able to avoid other structures in the accommodating cavity 201, the higher the installation position is, the higher the first shelf 300 is lifted, and vice versa, the lifting height is relatively small.

[0534] 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 realize lifting the first shelf 300 to a higher position, and the above two factors can only consider one parameter or both parameters.

[0535] The swing amplitude parameter of the swing arm 2 can be characterized as the swing angle of the swing arm 2, and the span in the vertical direction between the first hinge mounting part 21 and the second hinge mounting part 22 when the swing arm 2 is at its upper swing limit position. A larger swing angle results in a greater lifting height for the first shelf 300, and vice versa. Similarly, a larger span between the first hinge mounting part 21 and the second hinge mounting part 22 when the swing arm 2 is at its upper swing limit position results in a greater lifting height for the first shelf 300, and vice versa. For the swing arm 2, a larger span necessitates a longer length.

[0536] In one embodiment, referring to FIG63, at the upper limit position, the swing arm 2 is used to support the first shelf 300 upward, and the swing arm 2 is inclined upward in the direction from back to front.

[0537] In the technical solution of this application, the first shelf 300 is lifted by swinging the swing arm 2, so that the shelf can be raised to the top lifting limit position. At the top lifting limit position, the swing arm 2 is used to support the first shelf 300 upward, and the swing arm 2 is tilted upward in the back-to-forehead direction. Compared with the swing arm 2 swinging to the horizontal direction, the swing arm 2 can swing at a larger angle, so that the first shelf 300 can be raised to a greater height, reducing the user's frequent bending over during operation and improving the user experience.

[0538] In the technical solution of this application, the angle between the swing arm 2 and the horizontal direction is not limited to the upper swing limit position. In one embodiment, please refer to FIG63. Corresponding to the upper swing limit position, the angle between the line connecting the rotation center of the first hinge mounting part 21 and the second hinge 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 shelf 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 70° is a more reasonable value.

[0539] It should be noted that the included angle can be an integer value of 70°, or an arbitrary integer value between 0° and 70°, such as 10°, 20°, 30°, 40°, 50°, 60°, and the like. Of course, it can also be an angle value between any two of the above integers, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, and the like, between 0° and 10°. It can also be a degree value between 10° and 20°, between 20° and 30°, between 30° and 40°, between 40° and 50°, between 50° and 60°, and of course some decimal degree values. The above values are within the scope of the present application.

[0540] It can be understood that when the α angle is large, the lifting height of the first shelf 300 is large, and the first shelf 300 is close to the housing 200 of the household appliance 1000 in the front-rear direction. During lifting of the first shelf 300 by the lifting mechanism 100, the first shelf 300 has a greater risk of interfering with other structures in the upper space of the housing 200. When the α angle is small, the lifting height of the first shelf 300 is small, and the first shelf 300 is away from the housing 200 of the household appliance 1000 in the front-rear direction. During lifting of the first shelf 300 by the lifting mechanism 100, the first shelf 300 has a smaller risk of interfering with other structures in the upper space of the housing 200.

[0541] When the α angle is 70°, the first shelf 300 can be lifted to a higher position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than that of the second shelf 400), meeting the large-height lifting requirement of the first shelf 300 and improving user experience.

[0542] In some embodiments, as shown in FIG. 63, two swing arms 2 are provided, and the two swing arms 2 are staggered to at least partially overlap in the vertical plane when swung to the limit position. When the α angle is 70°, the rotation centers of the two first hinge mounting portions 21 of the two swing arms 2 and the second hinge mounting portions 22 of the two swing arms 2 can be collinearly arranged, meeting the large-height lifting requirement of the first shelf 300.

[0543] After the first shelf 300 is lifted to the top limit position, and the placing and taking of the items to be placed is completed in the first shelf 300, the first shelf 300 needs to be lowered back. During the lowering back of the first shelf 300, the user needs to apply a driving force to the first shelf 300, so that the swing arm 2 swings downward around the first hinge mounting portion 21 as the center of rotation, and the value of the angle a affects the force applied by the user.

[0544] Specifically, when the value of the angle a is large, the force arm of the user pressing the first shelf 300 is small, and the force required to lower back the first shelf 300 is large; when the value of the angle a is small, the force arm of the user pressing the first shelf 300 is large, and the force required to lower back the first shelf 300 is small.

[0545] The value of the angle a needs to consider the lifting height of the first shelf 300, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the shell 200, and the force required to lower back the first shelf 300. When the value of the angle a is less than 70°, the risk of interference between the first shelf 300 and other structures arranged in the upper space of the shell 200 is small, and subsequent detailed description will not be made for this element.

[0546] In some embodiments, the value of the angle a can be between 15° and 50°, the first shelf 300 can be lifted to a suitable high position, and the force required to lower back the first shelf 300 is moderate.

[0547] The following is described in terms of the value of the angle a, the lifting height of the first shelf 300, and the force required to lower back the first shelf 300, and the value of the angle a is taken as 70° as a reference example.

[0548] When the value of the angle a is 15°, compared with the reference example, the angle is reduced by 55°, which causes the maximum height that the first shelf 300 can be lifted to be reduced by about 0.7 times, the force arm of the user pressing the first shelf 300 is increased by about 1.8 times, the force arm is increased significantly, and the user is more labor-saving. When the value of the angle a is 15°, the force required to lower back the first shelf 300 is considered more, in this embodiment, the first shelf 300 can be lifted to a suitable height position, the force required by the user to lower back the first shelf 300 is small, the household appliance 1000 is easier and more convenient to operate, and the user experience is improved.

[0549] When the α angle is 50°, compared with the reference example, the angle is reduced by 20°, which causes the maximum height of the first shelf 300 to be lifted to decrease by about 0.2 times, the force arm of the user to press the first shelf 300 to increase by about 1.2 times, the height decrease is obvious, and the first shelf 300 can be at a relatively large height. When the α angle is 50°, the lifting height of the first shelf 300 is considered, and in this embodiment, the force required for the first shelf 300 to drop and play back is moderate, the first shelf 300 can be lifted to a suitable high position as much as possible, and the large height lifting requirement of the first shelf 300 is met.

[0550] In some preferred embodiments, when the α angle is around 25°, compared with the reference example, the angle is reduced by 45°, which causes the maximum height of the first shelf 300 to be lifted to decrease by about 0.6 times, and the height decrease is moderate; the force arm of the user to press the first shelf 300 to increase by about 1.6 times, and the force arm increase is moderate, which takes into account the lifting height of the first shelf 300 and the force required for the first shelf 300 to drop and play back.

[0551] For the span between the first and second hinge mounting portions 21 and 22 in the up-down direction when the swing arm 2 is at the upper limit position, in an embodiment, please continue to refer to FIG. 63, the span of the rotation centers of the first and second hinge mounting portions 21 and 22 on the same swing arm 2 in the up-down direction is L1, and L1 is greater than 0 mm and less than or equal to 235 mm. The greater the span, the greater the height of the first shelf 300 to be lifted. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum span of 235 mm is a relatively reasonable value.

[0552] It should be noted that the span can be any integer value between 0 and 235, such as 50 mm, 100 mm, 150 mm, 200 mm, 235 mm, 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 50 mm, which can be 10 mm, 20 mm, 30 mm, 40 mm, etc. Of course, it can also be a span value between 150 mm and 200 mm, which can be 160 mm, 170 mm, 180 mm, 190 mm, etc. It can also be a span value between 50 mm and 100 mm, a span value between 100 mm and 150 mm, a span value between 200 mm and 235 mm, and of course, it can also be a decimal value. The above values are within the scope of the present application.

[0553] It can be understood that the greater the value of the span L1, the greater the lifting height of the first shelf 300. Under the premise that the limit angle a of the swing arm 2 is unchanged, the arm length of the swing arm 2 needs to be set longer when the first shelf 300 is lifted to a greater height. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a larger external space of the housing 200 of the household appliance 1000.

[0554] When the span L1 is 235 mm, as shown in FIG. 63, the first shelf 300 can be lifted to a higher position (in the embodiment in which the household appliance 1000 has a second shelf 400, the position of the bottom of the first shelf 300 is higher than the bottom of the second shelf 400), meeting the lifting requirement of a large height.

[0555] In some embodiments, the value of the span L1 can be between 60 mm and 190 mm. The following is described in terms of the value of the span L1, the limit swing angle of the swing arm 2, and the length of the swing arm 2, and the value of the span L1 is taken as 235 mm and the limit swing angle of the swing arm 2 is taken as 70° as a reference example.

[0556] When the value of the span L1 is 60 mm, the span is reduced by about 175 mm relative to the reference example, resulting in the arm length of the swing arm 2 being shortened by about 0.7 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a relatively small external space of the housing 200 of the household appliance 1000, saving the use space.

[0557] When the value of the span L1 is 190 mm, the span is reduced by about 45 mm relative to the reference example, resulting in the arm length of the swing arm 2 being shortened by about 0.2 times, and the lifting height of the first shelf 300 being reduced by about 0.2 times. When the first shelf 300 is lifted to the top lifting limit position, the first shelf 300 occupies a moderate external space of the housing 200 of the household appliance 1000, and the lifting height of the first shelf 300 is relatively large.

[0558] In some preferred embodiments, when the span L1 is about 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, the maximum height to which the first shelf 300 can be lifted being reduced by about 0.6 times, and 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 housing 200 of the household appliance 1000, saving space, and the height to which the first shelf 300 is lifted is moderate, meeting the requirement for lifting to a large height.

[0559] It can be understood that the value of the angle a and the value of the span L1 are interrelated, and when the arm length of the swing arm 2 is unchanged, the value of the angle a and the value of the span L1 are positively correlated, that is, the larger the value of the angle a, the larger the value of the span L1, the greater the height to which 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-rear direction, and the greater the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 during lifting of the first shelf 300 by the lifting mechanism 100.

[0560] The value of the angle a and the value of the span L1 are positively correlated, that is, the smaller the value of the angle a, the smaller the value of the span L1, the smaller the height to which the first shelf 300 can be lifted, and the farther the first shelf 300 is from the housing of the household appliance 1000 in the front-rear direction, and the smaller the risk of interference between the first shelf 300 and other structures provided in the upper space of the housing 200 during lifting of the first shelf 300 by the lifting mechanism 100.

[0561] In some embodiments, the value of the angle a can be between 15° and 50°, and the value of the span L1 can be between 60 mm and 190 mm, and the relevant descriptions of the value of the angle a and the value of the span L1 described above can be referred to, and will not be described here.

[0562] The upper swing limit position of the swing arm 2 defines the upper swing limit position of the swing arm 2. When 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, some embodiments, please continue to refer to FIG. 63, the swing arm 2 has a lower swing limit position corresponding to the bottom of the first shelf 300 to be lifted position, the swing arm 2 has a swing angle defined between the upper swing limit position and the lower swing limit position, the swing angle is obtuse angle, so as to increase the swing angle of the swing arm 2, so that the first shelf 300 can be moved to a higher position, the height of the first shelf 300 is increased, the frequency of bending of the user in the use process is reduced, and the user experience is improved.

[0563] The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2, and 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 completely the same.

[0564] Please refer to FIG. 63, which shows the lower swing limit position and the upper swing limit position of the swing arm 2. The swing angle is the included angle between the lower swing limit position and the upper swing limit position of the same swing arm 2. In the embodiment in which the swing arm 2 is provided as two, the swing angles of the two swing arms 2 are set to be the same.

[0565] In the technical solution of the present application, the swing angle is not limited to a specific angle value, and can be an obtuse angle. In some embodiments, please continue to refer to FIG. 63, the swing angle is β, and β is greater than 90° and less than or equal to 160°. The greater the swing angle, the greater the lifting height of the first shelf 300. Considering that the swing arm 2 needs to cooperate with other structures to realize lifting, and considering some interference factors and the structural strength of the swing arm 2, the maximum angle of the included angle is set to 160°, which is a more reasonable value.

[0566] It should be noted that the swing angle can be an integer value of 160°, or an arbitrary integer value between 90° and 160°, such as 100°, 110°, 120°, 130°, 140°, 150°, and the like. Of course, it can also be an angle value between any two of the above integers, such as a degree between 90° and 100°, which can be 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, and the like. It can also be a degree between 100° and 110°. It can also be a degree between 110° and 120°. It can also be a degree between 120° and 130°. It can also be a degree between 130° and 140°. It can also be a degree between 140° and 150°. It can also be a degree between 150° and 160°. Of course, it can also be a decimal degree value. The above values are all within the scope of the present application.

[0567] In an embodiment, referring to FIGS. 53, 57, 62, and 70, the lifting mechanism 100 further includes a first guide rail 4, which includes multiple sections of slide rails connected to each other in a telescopic sliding manner. The multiple sections of slide rails include at least a first section of slide rail 41 and a last section of slide rail 42. The first section of slide rail 41 is connected to the connecting piece, and the last section of 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 the bottom storage position and the bottom lifting position. By the telescopic movement of the first guide rail 4, the positional relationship of the first shelf 300 relative to the connecting piece can be adjusted, so that the first shelf 300 can be moved to the bottom storage position and stored in the accommodation cavity 201.

[0568] After the lifting mechanism 100 lifts the first shelf 300 to a suitable position, the first shelf 300 needs to be locked to prevent it from falling back under the action of gravity without human intervention, thereby reducing the user experience. In some embodiments, referring to FIGS. 70-22, the lifting mechanism 100 further includes a locking structure 5, which is used to relatively lock the swing arm 2 and the first shelf 300 after the first shelf 300 is lifted, i.e., the first shelf 300 is locked by the locking structure 5, so that the swing arm 2 and the first shelf 300 are relatively locked in rotation. During user use, the swing arm 2 and the first shelf 300 remain in a relatively locked state in rotation except for being unlocked by a person. In this way, the user can conveniently operate when taking and placing the objects to be placed, and the user experience is better.

[0569] In the embodiment that the first shelf 300 is lockable relative to the swing arm 2, the first shelf 300 can be lockable in the front-to-back direction, such as being lockable in the front direction or the back direction. During the swing of the swing arm 2, the first shelf 300 moves upward and forward, and thus, the front lock is more in line with the user's habits.

[0570] In an embodiment, the lifting mechanism 100 further comprises a connecting member, and the locking structure 5 comprises a locking member 5a that is movably mounted relative to the connecting member in the front-to-back direction, and the locking member 5a is configured to be mounted to the first shelf 300.

[0571] It should be noted that in the front lock mode, the first shelf 300 is lockable relative to the swing arm 2 in the forward direction, i.e., when the first shelf 300 is at the top lifting limit position, the first shelf 300 continues to move forward to correspond to the top locking position, and the first shelf 300 has a horizontal distance difference between the top lifting limit position and the top locking position, which are two different positions.

[0572] A sliding cooperation structure is provided between the locking member 5a and the swing arm 2, and during the forward movement of the locking member 5a relative to the connecting member, the sliding cooperation structure is in sliding cooperation, so that the first shelf 300 can move from the top lifting limit position to the top locking position, and the front lock of the first shelf 300 can be achieved through the cooperation of the sliding cooperation structure, without the need for additional complex locking and unlocking mechanisms, and the user's operation is more convenient.

[0573] In the technical solution of the present application, the specific structure of the sliding cooperation structure is not limited, such as two structures that cooperate with each other, one of which can be a shaft, and the other of which can be a rib or a groove, or a cooperation mode in which part of the rib and part of the groove cooperate.

[0574] In an embodiment, referring to FIGS. 70-22, the sliding cooperation structure comprises a cooperation sliding groove and a sliding shaft that slide relative to each other. At least one of the cooperation sliding grooves comprises a horizontal groove segment 5111 that extends in the front-to-back direction, and the sliding shaft corresponding to the forward movement of the locking member 5a relative to the connecting member can slide into the horizontal groove segment 5111 to stop the swing of the swing arm 2.

[0575] The horizontal slot segment 5111 has upper and lower slot walls in the up-down direction, and the sliding shaft and the upper or lower slot wall abut to limit the up-down direction, at which time the swing arm 2 stops swinging, i.e., the first shelf 300 is locked relative to the swing arm 2, and the sliding locking is achieved through the cooperation of the sliding shaft and the matching sliding groove, without the need for additional mechanisms, and the structure is simple. In addition, it also conforms to the user's operation habits, improving the user experience.

[0576] The present application does not limit the specific setting position of the sliding shaft and the matching sliding groove. For example, the sliding shaft can be arranged on the swing arm 2, and the matching sliding groove can be arranged on the locking member 5a. Alternatively, the sliding shaft can be arranged on the locking member 5a, and the matching sliding groove can be arranged on the swing arm 2.

[0577] In an embodiment, the matching sliding groove can be the horizontal slot segment 5111 only, and when the swing arm 2 is at the upper swing limit position, the sliding shaft is at the front end slot of the horizontal slot segment 5111, and when the locking member 5a is pulled forward, the sliding shaft slides backward into the horizontal slot segment 5111. When the swing arm 2 does not reach the upper swing limit position, the sliding shaft can be outside the locking member 5a or the swing arm 2.

[0578] In an embodiment, the matching sliding groove further includes an arc-shaped slot segment 5112, and the extension path of the arc-shaped slot segment 5112 is adapted to the rotation of the sliding shaft, i.e., the sliding shaft is always in the arc-shaped slot segment 5112 during the entire swing stroke of the swing arm 2, improving the stability of the swing arm 2 during swinging.

[0579] The matching sliding groove can be arranged on the locking member 5a or the swing arm 2. In an embodiment, the matching sliding groove is arranged on the locking member 5a, and the sliding cooperation structure is provided in two groups. The sliding shafts of the two groups of sliding cooperation structures are arranged on the same swing arm 2, and the matching sliding grooves of the two groups of sliding cooperation structures are arranged on the locking member 5a. By arranging two groups of sliding cooperation structures, the stability of the locking of the first shelf 300 is improved.

[0580] Since the positions of the sliding shafts of the two groups of sliding cooperation structures relative to the second hinge mounting portion 22 are different, the corresponding radii of rotation are also different, and the corresponding arc-shaped trajectories of rotation are also different. For the same locking member 5a, different trajectory lines are formed on the locking member 5a.

[0581] Specifically, the two sliding shafts include a first sliding shaft 513 adjacent to the second hinge mounting portion 22 and a second sliding shaft 514 away from the second hinge mounting portion 22.

[0582] Two said matching sliding grooves include a first matching sliding groove 511 arranged corresponding to the first sliding shaft 513, and a second matching sliding groove 512 arranged corresponding to the second sliding shaft 514, the guide inlet of the first matching sliding groove 511 is arranged at the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged at the front side end of the locking member 5a, by guiding in different positions, the stability of the first shelf 300 during lifting is better.

[0583] The guide inlet of the first matching sliding groove 511 is arranged at the lower side end of the locking member 5a, and the guide inlet of the second matching sliding groove 512 is arranged at the front side end of the locking member 5a, the first sliding shaft 513 and the second sliding shaft 514 are respectively matched and installed, and corresponding to the swinging of the swing arm 2 between the lower swing limit position and the upper swing limit position, the first sliding shaft 513 and the second sliding shaft 514 staggered slide similar to horizontal sliding and upward and downward sliding, so that the first shelf 300 is in a stable state.

[0584] The first shelf 300 and the locking member 5a are connected, so that the first shelf 300 can move linearly along the front and back direction relative to the connecting member, as described above, a first guide rail 4 is arranged between the connecting member and the locking member 5a, by the relative movement between the first guide rail 41 and the tail section sliding rail 42 of the first guide rail 4, the first shelf 300 can move linearly along the front and back direction relative to the connecting member.

[0585] In the embodiment in which two swing arms 2 are arranged, the locking structure 5 described above can be arranged on both of the swing arms 2, by arranging two locking structures 5 to lock two swing arms 2 respectively, repeated locking makes the locking of the first shelf 300 in the top locking position more reliable, and reduces the risk of falling by itself.

[0586] In an embodiment, the locking structure 5 only makes one of the swing arms 2 and the first shelf 300 relatively stop rotating, and any one of the two swing arms 2.

[0587] In order to ensure the stability of the lifting mechanism 100 during the lifting of the first shelf 300, the lifting mechanism 100 adopts a four-bar linkage mechanism, i.e. in the form of the fixed arm 1, two swing arms 2 and the connecting piece, which is arranged as a parallelogram linkage mechanism, so that for the mounting positions of the two swing arms 2 on the fixed arm 1, one is on the upper side and the other is on the lower side. In an embodiment, when both of the swing arms 2 are at the lower swing limit position, the two swing arms 2 include a first swing arm 2a on the left side and a second swing arm 2b on the right side, the mounting position of the first swing arm 2a on the fixed arm 1 is on the lower side, and the mounting position of the second swing arm 2b on the fixed arm 1 is on the upper side.

[0588] For the two sliding shafts, both are arranged on the second swing arm 2b, so that when the second swing arm 2b corresponds to the upper swing limit position, the upper end of the second swing arm 2b is higher than the upper end of the first swing arm 2a, and at this time, the second swing arm 2b and the locking piece 5a arranged on the shelf are conveniently locked.

[0589] In addition, it also needs to be explained that in the household appliance 1000, two lifting mechanisms 100 are arranged and are arranged in the left-right direction, i.e. two support points are formed on both sides of the first shelf 300 in the left-right direction, and through the arrangement of two lifting mechanisms 100, the first shelf 300 can be stably lifted.

[0590] Of course, in the embodiment of arranging two lifting mechanisms 100, the swing arms 2 can be correspondingly arranged with two or four, for jointly supporting the first shelf 300.

[0591] In the lifting mechanism 100, for the swing arms 2 and the fixed arm 1, a damping structure such as air support or spring can be arranged between the swing arms 2 and the fixed arm 1, so as to reduce the force of the user during the lifting or falling of the first shelf 300.

[0592] The specific structure of the household appliance 1000 will be described in detail in combination with some features of the lifting mechanism 100 proposed in the present application.

[0593] The household appliance 1000 includes a housing 200, which is formed with a receiving cavity 201, and an opening is further arranged on the front side of the housing 200, and a door body is arranged at the opening, the door body is opened to a suitable position to open the opening, at this time, the user can pull out the first shelf 300, and under the cooperation of the lifting mechanism 100, the first shelf 300 is lifted and extends out of the receiving cavity 201, so as to take out or put in the articles to be placed by the user.

[0594] The accommodating cavity 201 has a rear wall opposite to the opening and two side walls on both sides of the rear wall, the fixing arm 1 is fixed to the side wall, and the swing arm 2 of the lifting mechanism 100 moves in and out of the accommodating cavity 201 with the connecting position of the side wall as the hinge point, so as to realize the lifting of the first shelf 300.

[0595] Corresponding in the household appliance 1000, the first shelf 300 can have two positions of a bottom to be lifted position and a top lifting limit position; considering the embodiment that the first shelf 300 can move forward and backward relative to the connecting piece, the first shelf 300 can have three positions of a bottom storage position, a bottom to be lifted position and a top lifting limit position; considering the embodiment that the first shelf 300 can move forward relative to the connecting piece and be locked, the first shelf 300 can have four positions of a bottom storage position, a bottom to be lifted position, a top lifting limit position and a top locking position.

[0596] In some household appliances 1000, only one shelf is provided, two shelves are provided, or more shelves are provided, in the technical solution of the present application, referring to FIG. 66 and FIG. 67, a second shelf 400 is further provided in the accommodating cavity 201, corresponding to the top lifting limit position, the lower end of the first shelf 300 protrudes upward from the lower end of the second shelf 400, that is, at the lifting limit position of the first shelf 300, the lifting height of the first shelf 300 is higher than that of the second shelf 400, at this time, the lifting height is large, the frequency of bending over of the user is reduced, and the user experience is improved.

[0597] It should be noted that in the embodiment that two shelves are provided 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 at 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 is arranged opposite to the second shelf 400.

[0598] In view of the above-mentioned embodiments, the user needs to alternately use the first shelf 300 and the second shelf 400, that is, when the first shelf 300 is lifted, the second shelf 400 is kept in the accommodating cavity 201 as much as possible; when the second shelf 400 is used, the first shelf 300 is kept in the accommodating cavity 201 as much as possible, or the second shelf 400 is not lifted as much as possible.

[0599] Of course, for the upper end of the first shelf 300 and the upper end of the second shelf 400, in an embodiment, corresponding to the top lifting limit position and the top lifting locking position of the first shelf 300, the upper end of the first shelf 300 protrudes upwardly from the upper end of the second shelf 400, that is, under the premise that the first shelf 300 and the second shelf 400 have the same depth, the first shelf 300 can be at a higher position.

[0600] Corresponding to the product in which the household appliance 1000 is a dishwasher, the first shelf 300 corresponds to the lower basket of the dishwasher, and the second shelf 400 corresponds to the upper basket of the dishwasher. When using the lower basket of the dishwasher, the lifting mechanism 100 lifts the lower basket of the dishwasher to a position higher than the upper basket. In this state, the user has the same operating height as when using the upper basket of the dishwasher, or a higher height, and the user's operating experience will be better.

[0601] The following describes the user's use of the household appliance 1000 with reference to the structure of the household appliance 1000, taking the first shelf 300 as an example:

[0602] 1. The first shelf 300 is in the bottom storage position, as shown in FIGS. 51-54:

[0603] This state is the state in which the user is not using, or has just started using, or has finished using. In these states, the first shelf 300 is in the containing cavity 201 of the household appliance 1000. As can be seen from FIGS. 51-54, the first shelf 300 is stored in the containing cavity 201. At this time, the distance between the first section of the first guide rail 4 and the tail section of the guide rail 42 is the smallest or the distance of coincidence is the largest, and the swing arm 2 is at the lower swing limit position.

[0604] 2. The first shelf 300 is in the bottom lifting position, as shown in FIGS. 55-59:

[0605] This state is the state in which the user pulls out the first shelf 300 from the containing cavity 201, or the state in which the user lowers the first shelf 300 after using it. In these states, the first shelf 300 is at the opening of the containing cavity 201. As can be seen from FIGS. 55-59, at this time, the distance between the first section of the first guide rail 4 and the tail section of the guide rail 42 is relatively large or the distance of coincidence is relatively small. The first shelf 300 moves forward relative to the containing cavity 201 by a distance, and the swing arm 2 is still at the lower swing limit position.

[0606] 3. The first shelf 300 is in the top lifting limit position, as shown in Figs. 60-67:

[0607] This state is that the user lifts the first shelf 300, or the user exits the locking state after using the first shelf 300. In these states, the first shelf 300 is at the maximum height of lifting. As can be seen from Figs. 60-67, the distance between the first guide rail 4 and the tail section rail 42 is relatively large or the overlapping distance is small. The distance or the overlapping distance relative to the first shelf 300 at the bottom of the lifting position is unchanged. The swing arm 2 is at the upper swing limit position.

[0608] 4. The first shelf 300 is in the top locking position, as shown in Figs. 68-72:

[0609] This state is a locking state after the user lifts the first shelf 300. At this time, the user can take and place the items to be placed. In these states, the first shelf 300 is at the maximum height of lifting. As can be seen from Figs. 68-72, the distance between the first guide rail 4 and the tail section rail 42 is maximum or the overlapping distance is minimum. The first shelf 300 is moved forward a distance relative to the top lifting limit position at the top locking position. The swing arm 2 is still at the upper swing limit position.

[0610] The following introduces a complete use process of the user:

[0611] When the user needs to use the household appliance 1000, first open the door of the household appliance 1000. The user pulls the first shelf 300 forward from the bottom storage position to the bottom lifting position in the containing cavity 201. Under the 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 locking state, the user can take and place the items to be placed in the first shelf 300 under the condition of reducing the frequency of bending over.

[0612] When the user finishes the taking and placing of the to-be-shelved items, the user pushes the first shelf 300 backward, so that the first shelf 300 is unlocked and moves from the top unlocked position to the top lifted limit position; the user lowers the first shelf 300, so that the first shelf 300 moves from the top lifted limit position to the bottom to-be-lifted position; the user continues to push the first shelf 300 backward, so that the first shelf 300 moves from the bottom to-be-lifted position to the bottom storage position; when the first shelf 300 is at the bottom storage position, the user can close the door body, and the use of the household appliance 1000 is completed.

[0613] The above is only an optional embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like within the concept of the present application, using the contents of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A lifting mechanism for lifting a first shelf of a household appliance, enabling the first shelf to be switched between a bottom, rest position and a top, raised limit position, wherein, The lifting mechanism comprises: a fixed arm; and two swing arms, each of the swing arms is provided with a first hinged mounting portion and a second hinged mounting portion at two ends thereof respectively, each of the first hinged mounting portions is mounted to the fixed arm, each of the second hinged mounting portions is directly or indirectly mounted to the first shelf, each of the swing arms has an upper swing limit position and a lower swing limit position, the lower swing limit position is used to enable the first shelf to be at the bottom position to be lifted, the upper swing limit position is used to enable the first shelf to be at the top position to be lifted, a difference between the two first hinged mounting portions in the up-down direction is greater than a span of the two first hinged mounting portions in the front-rear direction; at the upper swing limit position, an included angle between a line connecting the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm and a line connecting the rotation centers of the two second hinged mounting portions of the two swing arms is γ, and 0°≤γ<90°.

2. The lifting mechanism of claim 1, wherein, 30°≤γ<90°.

3. The lifting mechanism of claim 1 or 2, wherein, at the lower swing limit position, the two swing arms include a first swing arm at the rear side and a second swing arm at the front side, an end of the first swing arm provided with the first hinged mounting portion is provided with an extension, and a third hinged mounting portion is arranged on the extension; the lifting mechanism further comprises a damping member, one end of the damping member is connected to the third hinged mounting portion, and the other end of the damping member is hinged to the fixed arm.

4. The lifting mechanism of claim 3, wherein, in the first swing arm, the rotation centers of the first hinged mounting portion and the second hinged mounting portion form a first line, the rotation centers of the first hinged mounting portion and the third hinged mounting portion form a second line, and an included angle between the first line and the second line is θ, and 95°≤θ≤180°.

5. The lifting mechanism of claim 3 or 4, wherein, 95°≤θ≤165°.

6. The lifting mechanism of any one of claims 3 to 5, wherein, in the first swing arm, a distance between the third hinged mounting portion and the first hinged mounting portion is L6, and 20mm≤L6≤170mm.

7. The lifting mechanism of claim 6, wherein, 20mm≤L6≤100mm.

8. The lifting mechanism of any one of claims 3 to 7, wherein, the damping member comprises a gas strut.

9. The lifting mechanism of any one of claims 1 to 8, wherein, the two swing arms are staggered in the front-rear direction; at the upper swing limit position, projections of the rotation centers of the two first hinged mounting portions and the rotation centers of the two second hinged mounting portions in a vertical plane are arranged in a same line.

10. The lifting mechanism of any one of claims 1 to 9, wherein, the two swing arms are at least partially opposite in the front-rear direction; at the upper swing limit position and / or the lower swing limit position, opposite side surfaces of the two swing arms are abutted.

11. The lifting mechanism of claim 10, wherein, the rotation centers of the first hinged mounting portion and the second hinged mounting portion of the same swing arm form a first line; opposite side surfaces of the two swing arms have a first side edge in a length direction of the swing arm, and the first side edge is arranged in parallel with the first line.

12. The lifting mechanism of claim 10 or 11, wherein, the rotation centers of the first hinged mounting portion and the second hinged mounting portion of the same swing arm form a first line, and at the lower swing limit position, the first line is arranged in extension in the up-down direction.

13. The lifting mechanism of any one of claims 10 to 12, wherein, opposite side surfaces of the two swing arms include a first side surface and a second side surface, and the first side surface is provided with an abutment protrusion protruding towards the second side surface. In the lower swing limit position, the abutting protrusion avoids the second side surface; in the upper swing limit position, the abutting protrusion abuts the second side surface; or, In the lower swing limit position, the abutting protrusion abuts the second side surface; in the upper swing limit position, the abutting protrusion avoids the second side surface.

14. The lifting mechanism of claim 13, wherein, The two swing arms include a first swing arm at the rear side in the lower swing limit position, and a second swing arm at the front side; The first side surface is located on the second swing arm; The abutting protrusion is arranged at one end of the second swing arm provided with the first hinged mounting portion.

15. The lifting mechanism of claim 14, wherein, In the second swing arm, the rotation centers of the first hinged mounting portion and the second hinged mounting portion form a first connecting line; The side surface of the abutting protrusion has a second side edge in the length direction of the second swing arm, and the second side edge is arranged in parallel with the first connecting line.

16. The lifting mechanism of claim 15, wherein, In the second swing arm, the distance between the rotation center of the second hinged mounting portion and the second side edge of the abutting protrusion is L7, and 10mm≤L7≤30mm.

17. The lift mechanism of any one of claims 1 to 16, wherein, In the upper swing limit position, the two swing arms are used to support the first shelf upward, and in the direction from rear to front, each swing arm is arranged upwardly inclined.

18. The lifting mechanism of claim 17, wherein, Corresponding to the upper swing limit position, the angle between the connecting line of 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°; and / or, Corresponding to the upper swing limit position, the difference between the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm in the up-down direction is L1, and 0<L1≤235mm.

19. A household appliance, wherein, The household appliance comprises: a housing formed with a receiving cavity; a lifting mechanism comprising the lifting mechanism according to any one of claims 1 to 18, the fixed arm of the lifting mechanism being arranged on the side wall of the receiving cavity; and, a first shelf directly or indirectly hinged to the two swing arms of the lifting mechanism; The lifting mechanism enables the first shelf to switch between a bottom standby lifting position and a top lifting limit position.

20. The household appliance of claim 19, wherein, A second shelf is further arranged in the receiving cavity, and corresponding to the top lifting limit position, the lower end of the first shelf protrudes upwardly beyond the lower end of the second shelf.

21. The household appliance of claim 20, wherein, The household appliance comprises a dishwasher, the first shelf is arranged as a lower basket, and the second shelf is arranged as an upper basket.

22. A lifting mechanism to lift a first shelf of a household appliance so that the first shelf can be switched between a bottom, rest position and a top, raised limit position, wherein, The lifting mechanism comprises: a fixed arm; and two swing arms, the two swing arms being at least partially arranged opposite to each other in the front-rear direction, each swing arm having a first hinged mounting portion and a second hinged mounting portion arranged corresponding to the two ends of the swing arm, each first hinged mounting portion being mounted to the fixed arm, each second hinged mounting portion being used to be directly or indirectly mounted to the first shelf, each swing arm having an upper swing limit position and a lower swing limit position, the lower swing limit position enabling the first shelf to be in the bottom standby lifting position, and the upper swing limit position enabling the first shelf to be in the top lifting limit position. At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other.

23. The lifting mechanism of claim 22, wherein, At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other.

24. The lifting mechanism of claim 23, wherein, The first and second hinge mounting portions of the same swing arm have a first connecting line formed by the rotation centers thereof; The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, which is arranged in parallel with the first connecting line.

25. The lifting mechanism of claim 23 or 24, wherein, The first and second hinge mounting portions of the same swing arm have a first connecting line formed by the rotation centers thereof, which is arranged in the up-down direction at the lower swing limit position.

26. The lifting mechanism of any one of claims 23 to 25, wherein, The opposite side surfaces of the two swing arms include a first side surface and a second side surface, and the first side surface has an abutting protrusion protruding towards the second side surface, wherein: At the lower swing limit position, the abutting protrusion avoids the second side surface; at the upper swing limit position, the abutting protrusion abuts against the second side surface; or, At the lower swing limit position, the abutting protrusion abuts against the second side surface; at the upper swing limit position, the abutting protrusion avoids the second side surface.

27. The lifting mechanism of claim 26, wherein, The two swing arms include a first swing arm at the rear side at the lower swing limit position and a second swing arm at the front side; The first side surface is located on the second swing arm; The abutting protrusion is arranged at one end of the second swing arm where the first hinge mounting portion is arranged.

28. The lifting mechanism of claim 27, wherein, In the second swing arm, the first and second hinge mounting portions have a first connecting line formed by the rotation centers thereof; The side surface of the abutting protrusion has a second side edge in the length direction of the second swing arm, which is arranged in parallel with the first connecting line.

29. The lifting mechanism of claim 28, wherein, In the second swing arm, the distance between the rotation center of the second hinge mounting portion and the second side edge of the abutting protrusion is L7, and 10mm≤L7≤30mm.

30. The lifting mechanism of any of claims 22 to 29, wherein, At the upper swing limit position, the two swing arms are used to support the first shelf upwards, and in the rear-to-front direction, each swing arm is arranged to be inclined upwards.

31. The lifting mechanism of claim 30, wherein, At the upper swing limit position, the angle between the connecting line of the rotation centers of the first and second hinge mounting portions on the same swing arm and the horizontal direction is α, and 0°<α≤70°; and / or, At the upper swing limit position, the difference between the rotation centers of the first and second hinge mounting portions on the same swing arm in the up-down direction is L1, and 0<L1≤235mm.

32. The lifting mechanism of any of claims 22 to 31, wherein, The same swing arm has a swing angle defined between the upper swing limit position and the lower swing limit position, and the swing angle is arranged to be obtuse.

33. The lifting mechanism of claim 32, wherein, The swing angle is β, and 90°<β≤160°.

34. A household appliance, wherein, The household appliance comprises: A housing formed with a receiving cavity; A lifting mechanism comprising the lifting mechanism according to any one of claims 22 to 33, and the fixed arm of the lifting mechanism is arranged on the side wall of the receiving cavity; and A first shelf directly or indirectly hinged to the two swing arms of the lifting mechanism; At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other. At the upper swing limit position and / or the lower swing limit position, the opposite side surfaces of the two swing arms abut against each other. The first and second hinge mounting portions of the same swing arm have a first connecting line formed by the rotation centers thereof; The first and second hinge mounting portions of the same swing arm have a first connecting line formed by the rotation centers thereof; The opposite side surfaces of the two swing arms have a first side edge in the length direction of the swing arm, which is arranged in parallel with the first connecting line. The first and second hinge mounting portions of the same swing arm have a first connecting line formed by the rotation centers thereof; The opposite side surfaces of the two swing arms include a first side surface and a second side surface, and the first side surface has an abutting protrusion protruding towards the second side surface, wherein: At the lower swing limit position, the abutting protrusion avoids the second side surface; at the upper swing limit position, the abutting protrusion abuts against the second side surface; or, At the lower swing limit position, the abutting protrusion abuts against the second side surface; at the upper swing limit position, the abutting protrusion avoids the second side surface. The two swing arms include a first swing arm at the rear side at the lower swing limit position and a second swing arm at the front side; The first side surface is located on the second swing arm; The abutting protrusion is arranged at one end of the second swing arm where the first hinge mounting portion is arranged. In the second swing arm, the first and second hinge mounting portions have a first connecting line formed by the rotation centers thereof; The side surface of the abutting protrusion has a second side edge in the length direction of the second swing arm, which is arranged in parallel with the first connecting line. In the second swing arm, the distance between the rotation center of the second hinge mounting portion and the second side edge of the abutting protrusion is L7, and 10mm≤L7≤30mm. At the upper swing limit position, the two swing arms are used to support the first shelf upwards, and in the rear-to-front direction, each swing arm is arranged to be inclined upwards. At the upper swing limit position, the angle between the connecting line of the rotation centers of the first and second hinge mounting portions on the same swing arm and the horizontal direction is α, and 0°<α≤70°; and / or, At the upper swing limit position, the difference between the rotation centers of the first and second hinge mounting portions on the same swing arm in the up-down direction is L1, and 0<L1≤235mm. The same swing arm has a swing angle defined between the upper swing limit position and the lower swing limit position, and the swing angle is arranged to be obtuse. The swing angle is β, and 90°<β≤160°. The household appliance comprises: A housing formed with a receiving cavity; A lifting mechanism comprising the lifting mechanism according to any one of claims 22 to 33, and the fixed arm of the lifting mechanism is arranged on the side wall of the receiving cavity; and A first shelf directly or indirectly hinged to the two swing arms of the lifting mechanism; The lifting mechanism enables the first shelf to be switched between a bottom standby lifting position and a top lifting limit position.

35. The household appliance of claim 34, wherein, A second shelf is arranged in the accommodating cavity, and the lower end of the first shelf protrudes upwardly beyond the lower end of the second shelf at the top lifting limit position.

36. The household appliance of claim 35, wherein, The household appliance comprises a dishwasher, and the first shelf is arranged as a lower basket, and the second shelf is arranged as an upper basket.

37. A lifting mechanism to lift a first shelf of a household appliance so that the first shelf can be switched between a bottom, rest position and a top, raised limit position, wherein, The lifting mechanism comprises: a fixed arm; and two swing arms, each of the swing arms having a first hinged mounting portion and a second hinged mounting portion, the first hinged mounting portion of each of the swing arms being mounted to the fixed arm, and the second hinged mounting portion of each of the swing arms being directly or indirectly mounted to the first shelf; the swing arms have an upper swing limit position, at which the first hinged mounting portion and the second hinged mounting portion on the same swing arm are arranged to have a rotation center line, and the rotation center lines of the two second hinged mounting portions of the two swing arms are arranged to have an included angle γ, and 0° < γ < 90°.

38. The lifting mechanism of claim 37, wherein, 30° ≤ γ < 90°.

39. The lifting mechanism of claim 37 or 38, wherein, At the upper swing limit position, the two swing arms comprise a first swing arm arranged below and a second swing arm arranged above, one end of the first swing arm, at which the first hinged mounting portion is arranged, is provided with an extension, and a third hinged mounting portion is arranged on the extension; the lifting mechanism further comprises a damping member, one end of the damping member being connected to the third hinged mounting portion, and the other end of the damping member being hinged to the fixed arm.

40. The lifting mechanism of claim 39, wherein, In the first swing arm, the rotation centers of the first hinged mounting portion and the second hinged mounting portion form a first line, the rotation centers of the first hinged mounting portion and the third hinged mounting portion form a second line, and the included angle between the first line and the second line is θ, and 95° ≤ θ ≤ 180°.

41. The lifting mechanism of claim 39 or 40, wherein, 95° ≤ θ ≤ 165°.

42. The lifting mechanism of any of claims 39-41, wherein, In the first swing arm, the distance between the third hinged mounting portion and the first hinged mounting portion is L6, and 20mm ≤ L6 ≤ 170mm.

43. The lifting mechanism of claim 42, wherein, 20mm ≤ L6 ≤ 100mm.

44. The lifting mechanism of any one of claims 39 to 42, wherein, The damping member comprises a gas strut.

45. The lift mechanism of any of claims 37 to 44, wherein, At the upper swing limit position, the swing arms are arranged to upwardly support the first shelf, and the swing arms are arranged to be upwardly inclined in a rear-to-front direction.

46. The lifting mechanism of claim 45, wherein, At the upper swing limit position, the included angle between the rotation center line 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°; and / or, At the upper swing limit position, the difference in height between the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm in the up-to-down direction is L1, and 0 < L1 ≤ 235mm.

47. A household appliance, wherein, The household appliance comprises: a housing formed with an accommodating cavity; a lifting mechanism comprising the lifting mechanism according to any one of claims 37 to 46, the fixed arm of the lifting mechanism being arranged on a side wall of the accommodating cavity; and a first shelf directly or indirectly hinged to the two swing arms of the lifting mechanism; the swing arms have an upper swing limit position, at which the first hinged mounting portion and the second hinged mounting portion on the same swing arm are arranged to have a rotation center line, and the rotation center lines of the two second hinged mounting portions of the two swing arms are arranged to have an included angle γ, and 0° < γ < 90°. 30° ≤ γ < 90°. At the upper swing limit position, the two swing arms comprise a first swing arm arranged below and a second swing arm arranged above, one end of the first swing arm, at which the first hinged mounting portion is arranged, is provided with an extension, and a third hinged mounting portion is arranged on the extension; the lifting mechanism further comprises a damping member, one end of the damping member being connected to the third hinged mounting portion, and the other end of the damping member being hinged to the fixed arm. In the first swing arm, the rotation centers of the first hinged mounting portion and the second hinged mounting portion form a first line, the rotation centers of the first hinged mounting portion and the third hinged mounting portion form a second line, and the included angle between the first line and the second line is θ, and 95° ≤ θ ≤ 180°. 95° ≤ θ ≤ 165°. In the first swing arm, the distance between the third hinged mounting portion and the first hinged mounting portion is L6, and 20mm ≤ L6 ≤ 170mm. 20mm ≤ L6 ≤ 100mm. The damping member comprises a gas strut. At the upper swing limit position, the swing arms are arranged to upwardly support the first shelf, and the swing arms are arranged to be upwardly inclined in a rear-to-front direction. At the upper swing limit position, the included angle between the rotation center line 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°; and / or, At the upper swing limit position, the difference in height between the rotation centers of the first hinged mounting portion and the second hinged mounting portion on the same swing arm in the up-to-down direction is L1, and 0 < L1 ≤ 235mm. the household appliance comprises: a housing formed with an accommodating cavity; a lifting mechanism comprising the lifting mechanism according to any one of claims 37 to 46, the fixed arm of the lifting mechanism being arranged on a side wall of the accommodating cavity; and a first shelf directly or indirectly hinged to the two swing arms of the lifting mechanism; The lifting mechanism enables the first shelf to be switched between a bottom standby lifting position and a top lifting limit position.

48. The household appliance of claim 47, wherein, A second shelf is further arranged in the accommodating cavity, and the lower end of the first shelf protrudes upwardly beyond the lower end of the second shelf at the top lifting limit position.

49. The household appliance of claim 48, wherein, The household appliance comprises a dishwasher, the first shelf is arranged as a lower basket, and the second shelf is arranged as an upper basket.

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