Swing arm, lifting mechanism and household appliance

Abstract

The utility model discloses a swing arm, a lifting mechanism and a household appliance, and belongs to the technical field of household appliances, the swing arm comprises a main body and an extension part, the two ends of the main body are correspondingly provided with a first hinge mounting part and a second hinge mounting part, and the first hinge mounting part is used for being hinged to a fixed arm of the lifting mechanism; the second hinge mounting part is used for being directly or indirectly hinged to a first storage rack of the household appliance, the extension part is arranged at the end, provided with the first hinge mounting part, of the main body, a third hinge mounting part is arranged on the extension part, and the third hinge mounting part is used for being in hinge fit with a damping part of a lifting mechanism; the included angle theta between the main body and the extending part is larger than or equal to 95 degrees and smaller than or equal to 180 degrees. According to the technical scheme, when the swing arm is located at the upper swing limit position, the extension portion of the swing arm can be closer to the fourth hinge installation portion of the damping piece, the damping portion is shorter, and therefore larger supporting force is provided, and the long-term reliability of the damping piece is improved.

Description

[0001] The present application claims priority to the Chinese patent application No. 202420943980.8, filed on April 30, 2024, entitled "Lifting mechanism and dishwasher", the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0002] The utility model relates to the technical field of household appliances, especially to swing arm, lifting mechanism and household appliance. BACKGROUND

[0003] Some current household appliances with double-layer shelves, such as dishwashers, ovens, etc., when taking and placing objects, often lift the lower shelf, and then take and place objects after lifting, thereby reducing the user's bending angle and bending frequency, and improving the user's experience.

[0004] In order to improve the user's experience during the lifting of the shelf, a lifting mechanism is generally provided, which includes a swing arm and a damping member. The damping member itself can be stretched and contracted, thereby converting potential energy into kinetic energy during the lifting of the shelf, achieving the effect of saving effort.

[0005] In the existing scheme, when the shelf is in the uppermost position, the damping member elastically presses one end of the swing arm of the lifting mechanism, thereby providing a certain support to the shelf. However, the current damping member provides a small support force, resulting in low long-term reliability of the damping member. SUMMARY

[0006] The main purpose of the present utility model is to provide a swing arm, a lifting mechanism and a household appliance, which aims to solve the problem of low long-term reliability of the damping member of the lifting mechanism of the existing household appliance.

[0007] To achieve the above-mentioned purpose, the utility model provides a swing arm used in the lifting mechanism of a household appliance, which comprises:

[0008] a main body, two ends of the main body are provided with a first hinged mounting part and a second hinged mounting part, the first hinged mounting part is used for being hinged to a fixed arm of the lifting mechanism, and the second hinged mounting part is used for being directly or indirectly hinged to a first shelf of the household appliance; and

[0009] an extension part provided at one end of the main body provided with the first hinged mounting part, and a third hinged mounting part is provided on the extension part, the third hinged mounting part is used for hinged cooperation with the damping member of the lifting mechanism.

[0010] Among them, the included angle between the main body and the extension part is θ, 95°≤θ≤180°.

[0011] In an embodiment, 95°≤θ≤165°.

[0012] In an embodiment, θ≥136°; and / or,

[0013] θ≤145°.

[0014] In an embodiment, the width of the extension is tapered in a direction away from the main body; and / or,

[0015] The main body and the extension are integrally arranged; and / or,

[0016] The third hinged mounting portion is arranged on a midline of the extension in the width direction; or,

[0017] The extension has a first side and a second side oppositely arranged along the width direction thereof, the first side of the extension is arranged to face away from the fixed arm of the lifting mechanism when mounted thereto, and the third hinged mounting portion is arranged between the midline of the extension in the width direction and the first side of the extension.

[0018] To achieve the above object, the present application further provides a lifting mechanism for lifting a first shelf of a household appliance, so that the first shelf can be switched between a bottom position to be lifted and a top position of lifting limit, the lifting mechanism comprising:

[0019] A fixed arm is arranged to be fixedly mounted in a receiving cavity of a housing of the household appliance;

[0020] A swing arm assembly comprising at least one swing arm, the swing arm being as described in any one of the above embodiments; and,

[0021] A damping member having a fourth hinged mounting portion and a fifth hinged mounting portion oppositely arranged along the length direction thereof, the fourth hinged mounting portion being arranged to be hinged to the receiving cavity of the housing, and the fifth hinged mounting portion being arranged to be hinged to the third hinged mounting portion of the swing arm.

[0022] In an embodiment, the swing arm has an upper swing limit position and a lower swing limit position on the active stroke thereof;

[0023] When the swing arm is at the lower swing limit position, a line between the fourth hinged mounting portion and the first hinged mounting portion is a first line, a line between the third hinged mounting portion and the first hinged mounting portion is a second line, and an included angle between the first line and the second line is β, wherein 5°≤β≤20°; and / or,

[0024] When the swing arm is at the lower swing limit position, a line between the fourth hinged mounting portion and the first hinged mounting portion is a first line, and an included angle between the first line and the main body of the swing arm is a, and 90°≤a≤145°.

[0025] In an embodiment, 116°≤a≤140°.

[0026] In an embodiment, when the swing arm is at the upper swing limit position, an included angle between the damping member and the extension of the swing arm is x, and 80°≤x≤100°.

[0027] In an embodiment, x is 90°.

[0028] In an embodiment, the swing arm has an upper swing limit position and a lower swing limit position on its active stroke, and the swing arm is configured to support the shelf upwardly at the upper swing limit position;

[0029] The swing arm is upwardly inclined in a rear-to-front direction;

[0030] A line between the first hinged mounting portion and the second hinged mounting portion is a third line, and an included angle between the third line and the horizontal direction is c, and 0°<c≤70°.

[0031] In an embodiment, the damping member comprises an air strut.

[0032] To achieve the above object, the present application further provides a household appliance, characterized in that comprising:

[0033] A housing is formed with a receiving cavity;

[0034] A lifting mechanism comprises any of the lifting mechanisms described above, and a fixed arm of the lifting mechanism is arranged on a side wall of the receiving cavity; and

[0035] A first shelf is hingedly connected to a swing arm of the lifting mechanism.

[0036] The lifting mechanism enables the first shelf to switch between a bottom standby lifting position and a top lifting limit position.

[0037] In an embodiment, a second shelf is further arranged in the receiving cavity, and a lower end of the first shelf is arranged upwardly beyond a lower end of the second shelf at the top lifting limit position.

[0038] In an embodiment, the household appliance comprises a dishwasher, and the first shelf is arranged as a lower basket.

[0039] The utility model provides a technical scheme provided by the utility model discloses, the included angle of the main part and the extension of the swing arm is greater than the included angle of the main part and the extension of the swing arm of prior art, so that when the swing arm is at the upper limit position, the extension of the swing arm can be closer to the fourth hinged mounting portion of the damping member, the length of the damping portion is shorter, so that greater support force is provided, and the long-term reliability of the damping member is improved. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without creative labor for those skilled in the art.

[0041] Figure 1 It is an embodiment of the structure schematic diagram of prior lifting mechanism;

[0042] Figure 2 It is a three-dimensional structure schematic diagram of an embodiment of the household appliance (the first shelf is at the bottom storage position, and the swing arm of the lifting mechanism is at the lower limit position) provided by the utility model;

[0043] Figure 3 It is Figure 2 The front view structure schematic diagram of the household appliance;

[0044] Figure 4 It is Figure 2 The three-dimensional structure schematic diagram containing the lifting mechanism and the first shelf;

[0045] Figure 5 It is Figure 2 The three-dimensional structure schematic diagram of the lifting mechanism;

[0046] Figure 6 It is Figure 2 The mounting structure schematic diagram of the damping member and the swing arm;

[0047] Figure 7 It is Figure 2 The three-dimensional structure schematic diagram of the household appliance (the first shelf is at the bottom to be lifted position, and the swing arm of the lifting mechanism is at the lower limit position) in

[0048] Figure 8 It is Figure 7 The front view structure schematic diagram of the household appliance;

[0049] Figure 9 It is Figure 7 The three-dimensional structure schematic diagram containing the lifting mechanism and the first shelf;

[0050] Figure 10 Fig. 1 is a perspective view of a household appliance according to the present application; Figure 7 Fig. 2 is a perspective view of the lifting mechanism of the household appliance of Fig. 1 ;

[0051] Figure 11 Fig. 3 is a perspective view of the household appliance of Fig. 1 in a first position; Figure 2 Fig. 4 is a perspective view of the household appliance of Fig. 1 in a second position;

[0052] Figure 12 Fig. 5 is a front view of the household appliance of Fig. 1 ; Figure 11 Fig. 6 is a front view of the household appliance of Fig. 1 in a first position;

[0053] Figure 13 Fig. 7 is a front view of the household appliance of Fig. 1 in a second position; Figure 11 Fig. 8 is a perspective view of the household appliance of Fig. 1 in a first position;

[0054] Figure 14 Fig. 9 is a perspective view of the household appliance of Fig. 1 in a second position; Figure 13 Fig. 10 is an enlarged view of detail A of Fig. 9;

[0055] Figure 15 Fig. 11 is a perspective view of the lifting mechanism of the household appliance of Fig. 1 ; Figure 11 Fig. 12 is a perspective view of the household appliance of Fig. 1 in a first position;

[0056] Figure 16 Fig. 13 is a perspective view of the household appliance of Fig. 1 in a second position; Figure 2 Fig. 14 is a perspective view of the household appliance of Fig. 1 in a first position;

[0057] Figure 17 Fig. 15 is a perspective view of the household appliance of Fig. 1 in a second position; Figure 16 Fig. 16 is a front view of the household appliance of Fig. 1 ;

[0058] Figure 18 Fig. 17 is a front view of the household appliance of Fig. 1 in a first position; Figure 16 Fig. 18 is a front view of the household appliance of Fig. 1 in a second position;

[0059] Figure 19 Fig. 19 is an enlarged view of detail B of Fig. 18; Figure 18 Fig. 20 is a perspective view of the lifting mechanism of the household appliance of Fig. 1 ;

[0060] Figure 20 Fig. 21 is a perspective view of the household appliance of Fig. 1 in a first position; Figure 16 Fig. 22 is a perspective view of the household appliance of Fig. 1 in a second position;

[0061] Figure 21 Fig. 23 is a perspective view of the mounting structure of the damping member and the swing arm of the household appliance of Fig. 1 ; Figure 16 BRIEF DESCRIPTION OF THE DRAWINGS

[0062] BRIEF DESCRIPTION OF THE DRAWINGS

[0063] 100, lifting mechanism; 1, fixed arm; 2, swing arm; 3, main body; 4, extension; 31, first hinged mounting portion; 32, second hinged mounting portion; 41, third hinged mounting portion; 6, damping member; 61, fourth hinged mounting portion; 62, fifth hinged mounting portion; 91, head section sliding rail; 92, tail section sliding rail;

[0064] 1000, household appliance; 200, housing; 201, accommodating cavity; 2012, side wall; 300, first shelf; 400, second shelf;

[0065] 2000, lifting mechanism; 2100, damping member; 2200, swing arm.

[0066] The purposes, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0068] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0069] In addition, if the embodiments of the utility model involve descriptions of "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 or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes A scheme, or B scheme, or A and B simultaneously meet the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0070] Some household appliances with double-layer shelves, such as dishwashers, ovens, etc., often lift the lower shelf when taking and placing objects, and then take and place objects, thereby reducing the user's bending angle and bending frequency, and improving the user's experience.

[0071] Please refer to Figure 1 In order to improve the user's experience during the lifting of the shelf, a lifting mechanism 2000 is generally provided during the lifting of the shelf, the lifting mechanism 2000 includes a swing arm 2200 and a damping member 2100, the damping member 2100 can be stretched and contracted by itself, thereby converting potential energy into kinetic energy during the lifting of the shelf, achieving the effect of saving labor.

[0072] In the existing scheme, when the shelf is in the upper swing limit position, the damping member 2100 elastically presses one end of the swing arm 2200 of the lifting mechanism, thereby supporting the shelf to a certain extent. The supporting force provided by the current damping member 2100 is small, which leads to low long-term reliability of the damping member 2100.

[0073] In order to solve the above problems, the utility model provides a swing arm 2, Figures 2-21 The utility model provides a swing arm 2.

[0074] Please refer to Figures 2-6 The swing arm 2 is used in the lifting mechanism 100 of the household appliance 1000, the swing arm 2 includes a main body 3 and an extension part 4, both ends of the main body 3 are correspondingly provided with a first hinged mounting part 31 and a second hinged mounting part 32, the first hinged mounting part 31 is used for being hinged to the fixed arm 1 of the lifting mechanism 100, the second hinged mounting part 32 is used for being directly or indirectly hinged to the first shelf 300 of the household appliance 1000, the extension part 4 is arranged at one end of the main body 3 provided with the first hinged mounting part 31, and a third hinged mounting part 41 is arranged on the extension part 4, the third hinged mounting part 41 is used for hinged cooperation between the damping member 6 of the lifting mechanism 100, wherein the included angle between the main body 3 and the extension part 4 is θ, and 95°≤θ≤180°.

[0075] It should be noted that the swing arm 2 has an upper swing limit position and a lower swing limit position on its activity stroke, the upper swing limit position corresponds to the top lifting limit position of the first shelf 300, and the lower swing limit position corresponds to the bottom to be lifted position of the first shelf 300.

[0076] The utility model discloses a technical scheme provided in the utility model discloses a technical scheme, 95 DEG ≤ theta ≤ 180 DEG, theta can take arbitrary value between 95 DEG to 180 DEG, for example 95 DEG, 120 DEG, 140 DEG etc., because it is greater than 90 DEG, the angle of the main part 3 and the extension 4 is greater than the angle of the main part and the extension of the existing swing arm 2200, thereby when the swing arm 2 is at the upper swing limit position, the extension 4 of the swing arm 2 can be closer to the fourth hinged mounting portion 61 of the damping member 6, let the damping part length be shorter, thereby provide greater support force, improve the long-term reliability of damping member 6.

[0077] Need to explain, the specific implementation form of the household appliance 1000 is not limited, can be dishwasher, refrigerator, oven and the like, here is not limited. The setting position of the third hinged mounting portion 41 is not limited, can be set in the middle of the extension 4, can also be set in the end of the extension 4 away from the main body 3, it can be understood that the force exerted by the damping member 6 on the swing arm 2 can be decomposed into a component force along the extension direction of the extension 4 and a tangential force perpendicular to the extension direction of the extension 4, the component force will be cancelled by the reaction force of the first hinged mounting portion of the main body 3, and the tangential force can drive the swing arm to rotate or stop rotating.

[0078] Therefore, the distance between the third hinged mounting portion 41 and the first hinged mounting portion 31 of the main body 3 is the force arm of the tangential force exerted by the damping member 6 on the main body 3, the greater the distance, the smaller the driving force of the damping member 6 on the main body 3 can be, therefore, in an embodiment, the third hinged mounting portion 41 is set in the end of the extension 4 away from the main body 3. Moreover, the specific implementation form of the third hinged mounting portion 41 is not limited, which can be in the form of a rotating protrusion, or in the form of a rotating hole, etc., which is not limited here.

[0079] It should be noted that the specific implementation form of the damping member 6 is not limited, which can be a gas strut, a compression spring, etc., which is not limited here, which is always in a compressed state, thereby being able to output a thrust force outward, it can be understood that the shorter the length of the damping member 6, the greater the thrust force it can output, the fourth hinged mounting portion 61 and the fifth hinged mounting portion 62 of the damping member 6 are arranged opposite along the length direction of the damping member 6, the fourth hinged mounting portion 61 is used for being hinged into the accommodating cavity 201 of the shell 200, and the fifth hinged mounting portion 62 is hinged and matched with the third hinged mounting portion 41 of the swing arm 2, it should be emphasized that the fourth hinged mounting portion 61 of the damping member 6 is fixed-point mounting, and the position of the fourth hinged mounting portion 61 in the accommodating cavity 201 will not change, specifically, the fourth hinged mounting portion 61 can be hinged to the inner wall of the accommodating cavity 201, or can be hinged to the fixed arm 1, which is not limited here, please refer toFigure 1 and Figure 6 The existing swing arm 2200 generally has an included angle of 90° between its main body and extension. By increasing the included angle between the main body 3 and extension 4 of the swing arm 2, while keeping the length of the extension 4 unchanged, when the swing arm 2 is at its upper swing limit position, the first hinge mounting part 31 of the extension 4 of the swing arm 2 can be brought closer to the third hinge mounting part 41 of the damping member 6, thereby reducing the length of the damping member 6, enabling it to provide greater support force and improving its long-term reliability.

[0080] Of course, the angle θ between the main body 3 and the extension 4 cannot be too large. When θ is greater than 180°, further increasing θ will not necessarily decrease the length of the damping member 6, but may instead increase it. Therefore, θ ≤ 180° to avoid the angle between the main body 3 and the extension 4 being too large, which would result in the damping member 6 being too long.

[0081] Regarding the range of values ​​for θ, further explanation will be provided below in conjunction with embodiments of this utility model:

[0082] In one embodiment of this utility model, 95°≤θ≤165°. The reason for choosing "95°≤θ≤165°" is based on the following considerations for further optimization, which are analyzed in detail below:

[0083] The damping member 6 has a fourth hinge mounting portion 61 and a fifth hinge mounting portion 62 arranged opposite to each other along its length direction. The fourth hinge mounting portion 61 is used to hinge to the receiving cavity 201 of the housing 200, and the fifth hinge mounting portion 62 is hinged to the third hinge mounting portion 41 of the swing arm 2.

[0084] like Figure 6 As shown, when the swing arm 2 is at its lower limit position, the line connecting the fourth hinge mounting part 61 and the first hinge mounting part 31 is within the included angle θ. Dividing angle θ into angle β and angle α, θ = α + β. The line connecting the fourth hinge mounting part 61 and the first hinge mounting part 31 is the first line, and the line connecting the third hinge mounting part 41 and the first hinge mounting part 31 is the second line. The included angle between the first line and the second line is β. The line connecting the fourth hinge mounting part 61 and the first hinge mounting part 31 of the damping member 6 is the first line, and the included angle between the first line and the main body 3 of the swing arm 2 is α.

[0085] Please see Figure 6When the swing arm 2 is at the lower limit position, the third hinge mounting portion 41 of the extension 4 is above the line between the fourth hinge mounting portion 61 of the damper 6 and the first hinge mounting portion 31, so that during the lifting of the shelf, the swing arm 2 first overcomes the damping force of the damper 6 to compress the damper 6, and when the third hinge mounting portion 41 of the extension 4, the fourth hinge mounting portion 61 of the damper 6, and the first hinge mounting portion 31 of the swing arm 2 are collinear, the length of the damper 6 is the shortest, then the third hinge mounting portion 41 of the extension 4 continues to move downward, and during the movement of the third hinge mounting portion 41 of the extension 4, the length of the damper 6 becomes longer, converting the potential energy of the damper 6 into kinetic energy during the movement of the swing arm 2, thereby saving effort.

[0086] It can be understood that the angle β determines the movement stroke of the swing arm 2 from the lower limit position to the position where the third hinge mounting portion 41, the fourth hinge mounting portion 61, and the first hinge mounting portion 31 are collinear, that is, the power-assisted stroke of the compression of the damper 6, and this stroke cannot be too short, otherwise, the first shelf 300 is too easy to be pulled out, and the user is prone to misoperation. Similarly, during this stroke, the user needs to overcome the damping force of the damper 6 to do work, and therefore, this stroke cannot be too long, otherwise, the user needs to do too much work to pull out the first shelf 300. Therefore, 5°≤β≤20°, β is greater than or equal to 5°, so as to avoid the stroke of overcoming the damping force of the damper 6 to do work being too short, and the user misoperates to pull out the first shelf 300, and β is less than or equal to 20°, so as to avoid the stroke of overcoming the damping force of the damper 6 to do work being too long, and the user experience is poor.

[0087] It should be noted that when the swing arm 2 is in the lower swing limit position, the main body 3 of the swing arm 2 is vertically downward, at this time, the angle a determines the mounting position of the fourth hinged mounting portion 61 of the damping member 6, if the angle a is less than 90°, at this time, the fourth hinged mounting portion 61 of the damping member 6 will be located below the first hinged mounting portion 31 of the swing arm 2, on the one hand, when the swing arm 2 is in the upper swing limit position, the length of the damping member 6 will be relatively long, the support force provided is limited, and the long-term reliability is not high, on the other hand, when the swing arm 2 is in the lower swing limit position, the damping member 6 is upwardly inclined, and its gravity will offset a certain thrust, and due to the limited space between the first shelf 300 and the second shelf 400, when the angle a is less than 90°, the damping member 6 will occupy more space downward, thereby making it easy to interfere with the first shelf 300. Therefore, in further embodiments, a is greater than or equal to 90°, on the one hand, it ensures that the damping member 6 will not interfere with the movement of the first shelf 300, and on the other hand, it avoids the phenomenon that when the swing arm 2 is in the upper swing limit position, the length of the damping member 6 is relatively long, and the support force provided is limited.

[0088] However, the angle a cannot be too large, if the angle a is too large, when the swing arm 2 is in the upper swing limit position, the mounting position of the fourth hinged mounting portion 61 of the damping member 6 will be very high, at this time, in order to make the damping member 6 not interfere with the second shelf 400, it is necessary to make the gap between the first shelf 300 and the second shelf 400 very large, thereby causing the overall size of the household appliance 1000 to be large, and when the overall size of the household appliance 1000 is not changed, the angle a should be less than or equal to 145°, thereby adapting to the up-down spacing between the first shelf 300 and the second shelf 400 of the household appliance 1000 on the market.

[0089] In summary, 5°≤β≤20°, 90°≤α≤145°, correspondingly, the value range of the angle θ combined by the angle a and the angle β is 95°-165°, therefore, when 95°≤θ≤165°, on the one hand, it can make the damping member 6 provide sufficient support force, and on the other hand, it avoids the damping member 6 occupying too much space upward.

[0090] Further, please refer to Figure 1 and Figures 13-16In an embodiment, the first shelf 300 is higher when it is at the uppermost limit of the lifting range than the height of the first shelf 300 in the prior art when it is at the uppermost limit of the lifting range. Specifically, when the swing arm 2200 of the prior lifting mechanism 2000 is at the uppermost limit of the lifting range, the main body of the swing arm 2200 is generally horizontal. After the first shelf 300 is lifted, when the swing arm 2 is at the uppermost limit of the lifting range, the main body 3 of the swing arm 2 is inclined upward. At this time, if the prior swing arm 2200 is directly used, the distance between the extension of the swing arm 2200 and the fourth hinged mounting portion of the damping member 2200 will be greater than the length of the damping member 2100 in the horizontal state. Correspondingly, the length of the damping member 6 will also be pulled longer. At this time, the compression amount of the damping member 6 will be smaller, and the support force that can be provided will be limited.

[0091] Based on the above embodiment of 95°≤θ≤165°, the following refined embodiments are included but not limited to:

[0092] The first refined embodiment: 95°≤θ<136°, for example, 95°, 100°, 110°, etc. At this time, when the swing arm 2 is at the uppermost limit of the lifting range, the length of the damping member 6 will be smaller than the length of the prior damping member, so as to provide greater support force. However, since the first shelf 300 is lifted higher, the length of the damping member 6 is still relatively long, so that the support force that can be provided is limited, and the stability of the first shelf 300 being supported is not particularly good.

[0093] The second refined embodiment: 165°≥θ≥136°, so that without changing the selection of the damping member 6, even if the height of the first shelf 300 at the uppermost limit of the lifting range is lifted, the angle θ is greater than or equal to 136°, the length of the damping member 6 is shorter, sufficient support force is provided, and the first shelf 300 can be better supported.

[0094] The third refined embodiment: 145°<θ≤165°, for example, 146°, 150°, 155°, etc. Correspondingly, at this time, when the swing arm 2 is at the uppermost limit of the lifting range, the length of the damping member 6 will be much greater than the length of the prior damping member, so as to provide greater support force, and the stability of the first shelf 300 being supported is good. However, the damping member 6 will occupy more space and is prone to interference with other components.

[0095] The fourth refined embodiment: 95°≤θ≤145°, so as to avoid that the damping member 6 occupies too much space upwardly and avoids interference between the swing arm 2 and other components during upward swinging.

[0096] Fifth detailed embodiment: 136°≤θ≤145°, at this time, θ is much larger than 90°, when the swing arm 2 is in the upper swing limit position, the length of the damping member can be greatly reduced, so that it can provide greater support force, and θ≤145° can avoid the damping member 6 occupying too much space upward, avoiding the swing arm 2 from interfering with other components during upward swing.

[0097] And in this embodiment, the angle θ includes the angle α and the angle β, when 136°≤θ≤145°, the value range of the β angle can be kept unchanged, 5°≤β≤20°, so that the corresponding α value is between 116° and 140°, that is, 116°≤α≤140°, when the θ angle is 136°, the β takes the maximum value, that is, 20°, and the minimum value of α corresponding to it is 116°, when the θ angle is 145°, the β takes the minimum value, that is, 5°, and the maximum value of α corresponding to it is 140°, when α is greater than or equal to 116°, it is much larger than 90°, so that the damping member 6 and the swing arm 2 in the lower limit position will not occupy too much space downward, and α is less than or equal to 140°, and will not occupy too much space upward, so as to avoid the damping member 6 from occupying too much space upward, avoiding the swing arm 2 from interfering with other components during upward swing.

[0098] In addition, the width of the extension part 4 can be constant or variable, which is not limited here, it can be understood that the width of the end of the extension part 4 connected with the main body 3 is larger, and the stability of the connection with the main body 3 is better, and the width of the first rotating part of the extension part 4 is smaller, the support force provided by the damping member 6 is more concentrated, and can be better transmitted to the main body 3, therefore, in a further embodiment, the width of the extension part 4 is tapered in the direction away from the main body 3, so that in the technical solution of this embodiment, the width of the part of the extension part 4 connected with the main body 3 is the largest, and the stability of the connection is the best, and the width of the connection with the damping member 6 is smaller, so that the pushing force transmitted by the damping member 6 is more concentrated, and the width is gradually changed, which also improves the stability of the transmission.

[0099] The connection mode of the main body 3 and the extension part 4 is not limited, and can be splicing, welding and the like, of course, can also be integrated setting, considering that the swing arm 2 is a whole along the connecting end of the main body 3 and is fixed-point rotating, the extension part 4 needs to transmit force to the main body 3, therefore, the main body 3 and the extension part 4 should maintain a certain connection strength, in an embodiment, the main body 3 and the extension part 4 are integrally arranged, which can guarantee the connection strength between the main body 3 and the extension part 4, and on the other hand, makes the processing and manufacturing of the swing arm 2 more simple.

[0100] In addition, the position of the third hinged mounting part 41 in the width direction of the extension part 4 is not limited, in an embodiment, the third hinged mounting part 41 is arranged on the middle line of the width direction of the extension part 4, at this time, the connection position of the damping part 6 and the swing arm 2 is on the middle line of the width direction of the extension part 4, and the stability of rotation is the highest.

[0101] In other embodiments, the extension part 4 has a first side and a second side oppositely arranged along the width direction thereof, the first side of the extension part 4 is arranged to face away from the fixed arm 1 of the lifting mechanism 100 when mounted to the lifting mechanism 100, and the third hinged mounting part 41 is arranged between the middle line of the width direction of the extension part 4 and the first side of the extension part 4, in the technical solution of the present embodiment, the setting position of the first hinged mounting part is closer to the first side of the extension part 4 than to the second side of the extension part 4, at this time, the distance between the third hinged mounting part 41 and the fourth hinged mounting part 61 of the damping part 6 is smaller, and the length of the damping part 6 can be smaller when the swing arm 2 is in the uppermost limit position, thereby being able to provide greater support force.

[0102] In order to achieve the above-mentioned purpose, the present application also proposes a lifting mechanism 100 for lifting a first shelf 300 of a household appliance 1000, so that the first shelf 300 can be switched between a bottom position to be lifted and a topmost limit position to be lifted, the lifting mechanism 100 comprises a fixed arm 1, a swing arm 2 assembly and a damping part 6, the fixed arm 1 is arranged to be fixedly mounted into a receiving cavity 201 of a shell 200 of the household appliance 1000, the swing arm 2 assembly comprises at least one swing arm 2, and the swing arm 2 is any one of the swing arms 2 described above; the damping part 6 has a fourth hinged mounting part 61 and a fifth hinged mounting part 62 oppositely arranged along the length direction thereof, the fourth hinged mounting part 61 is arranged to be hinged into the receiving cavity 201 of the shell 200, and the fifth hinged mounting part 62 is hingedly connected with the third hinged mounting part 41 of the swing arm 2.

[0103] In the technical scheme of the embodiment, the first shelf 300 has a bottom position to be lifted and a top position of lifting limit on its lifting stroke. When the first shelf 300 is at the bottom position to be lifted, a user pulls the first shelf 300 to start lifting, at this time, the follow-up end of the swing arm 2 moves upward following the first shelf 300, the swing arm 2 rotates around the first hinged mounting part 31, at this time, since the second hinged mounting part 32 and the third hinged mounting part 41 are separately arranged on the two sides of the first hinged mounting part 31, when the second hinged mounting part 32 moves upward following the first shelf 300, the third hinged mounting part 41 moves downward, thereby driving the fifth hinged mounting part 62 of the damping member 6 to move downward, when the fifth hinged mounting part 62 of the damping member 6 moves downward, the damping member 6 rotates around the fourth hinged mounting part 61, the length of the damping member 6 first decreases, when the first hinged mounting part 31, the third hinged mounting part 41 and the fourth hinged mounting part 61 are collinear, the length of the damping member 6 reaches the minimum, then the fifth hinged mounting part 62 of the damping member 6 continues to move downward, the length of the damping member 6 increases, the potential energy of the damping member 6 is converted into the kinetic energy of the swing arm 2, thereby playing a role of saving labor in the lifting process of the first shelf 300.

[0104] When the first shelf 300 is lifted to the top position of lifting limit, the included angle between the main body and the extension part of the existing swing arm 2200 is small, which can cause the length of the damping member 6 to be long, thereby causing the damping member 6 to provide small supporting force and poor long-term stability. In the embodiment, the included angle between the main body 3 and the extension part 4 is greater than that between the main body and the extension part of the existing swing arm 2200, thereby causing the extension part 4 of the swing arm 2 to be closer to the fourth hinged mounting part 61 of the damping member 6 when the swing arm 2 is at the top position of lifting, the length of the damping member 6 is shorter, thereby providing greater supporting force and improving the long-term reliability of the damping member 6.

[0105] It should be noted that the specific composition form of the swing arm 2 assembly is not limited, which can be only one swing arm 2, or can include one swing arm 2, one connecting rod and a connecting arm, the two ends of the swing arm 2 and the connecting rod are respectively hinged to the connecting arm and the fixed arm 1, the connecting arm is used for mounting the first shelf 300 of the household appliance 1000, the swing arm 2, the connecting rod, the fixed arm 1 and the connecting arm can constitute a parallelogram, thereby causing the first shelf 300 to always keep an approximate horizontal state in the lifting process, avoiding the first shelf 300 from shaking in the lifting process.

[0106] Further, when the swing arm 2 is at the lower swing limit position, the included angle θ between the main body 3 and the extension 4 can be divided into an angle β and an angle α, the line between the fourth hinged mounting portion 61 of the damping member 6 and the first hinged mounting portion 31 is a first line, the line between the third hinged mounting portion 41 and the first hinged mounting portion 31 is a second line, the included angle between the first line and the second line is β, the line between the fourth hinged mounting portion 61 of the damping member 6 and the first hinged mounting portion 31 is a first line, and the included angle between the first line and the main body 3 of the swing arm 2 is α.

[0107] It can be understood that the angle β determines the active stroke of the swing arm 2 from the lower swing limit position to the position where the third hinged mounting portion 41 of the extension 4, the fourth hinged mounting portion 61 of the damping member 6, and the first hinged mounting portion 31 of the main body 3 are collinear, that is, the power stroke of the damping member 6. This stroke cannot be too short, otherwise the first shelf 300 is too easy to be pulled out, and the user is prone to misoperation. Similarly, in this stroke, the user needs to overcome the damping force of the damping member 6 to do work, so this stroke also cannot be too long, otherwise the user needs to do too much work to pull out the first shelf 300. Therefore, 5°≤β≤20°, β is greater than or equal to 5°, so as to avoid the stroke of overcoming the damping force of the damping member 6 to do work being too short, and the user misoperates to pull out the first shelf 300. And β is less than or equal to 20°, so as to avoid the stroke of overcoming the damping force of the damping member 6 to do work being too long, and the user experience is poor.

[0108] It should be noted that when the swing arm 2 is in the lower swing limit position, the main body 3 of the swing arm 2 is vertically downward, at this time, the angle α determines the installation position of the fourth hinged mounting portion 61 of the damping member 6, if the angle α is less than 90°, at this time, the fourth hinged mounting portion 61 of the damping member 6 will be located below the first hinged mounting portion 31 of the swing arm 2, on the one hand, when the swing arm 2 is in the upper swing limit position, the length of the damping member 6 will be relatively long, the support force that can be provided is limited, and the long-term reliability is not high, on the other hand, when the swing arm 2 is in the lower swing limit position, the damping member 6 is upwardly inclined, and the gravity will offset a certain thrust, and due to the limited space between the first shelf 300 and the second shelf 400, when the angle α is less than 90°, the damping member 6 will occupy more space downward, thereby making it easy to interfere with the first shelf 300. Therefore, in a further embodiment, α is greater than or equal to 90°, on the one hand, it ensures that the damping member 6 will not interfere with the movement of the first shelf 300, and on the other hand, it avoids the phenomenon that when the swing arm 2 is in the upper swing limit position, the length of the damping member 6 will be relatively long, and the support force that can be provided is limited.

[0109] However, the angle α cannot be too large, if the angle α is too large, when the swing arm 2 is in the upper swing limit position, the installation position of the fourth hinged mounting portion 61 of the damping member 6 will be very high, at this time, in order to make the damping member 6 not interfere with the second shelf 400, it is necessary to make the gap between the first shelf 300 and the second shelf 400 very large, thereby causing the overall size of the household appliance 1000 to be large, and when the overall size of the household appliance 1000 is not changed, the angle α should be less than or equal to 145°, thereby realizing the up-down spacing between the first shelf 300 and the second shelf 400 of the household appliance 1000 on the market.

[0110] In summary, 5°≤β≤20°, 90°≤α≤145°, correspondingly, the value range of the angle θ combined by the angle α and the angle β is 95°-165°.

[0111] Further, the movement track of the third hinged mounting portion 41 of the extension portion 4 is a circumferential swing with the first hinged mounting portion 31 as the center, thus, when tangential force is applied to the extension portion 4, the extension portion 4 can be better driven to rotate or stop, 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, correspondingly, the force of the damping member 6 on the extension portion 4 of the swing arm 2 is decomposed into two components, one of which is in the extension direction of the extension portion 4, and the other is in the direction perpendicular to the extension direction of the extension portion 4, and the size of the other component determines the acceleration of the extension portion 4, thus realizing the rotation or stop of the extension portion 4, in order to better stop the swing arm 2, the included angle between the damping member 6 and the extension portion 4 of the swing arm 2 is x, wherein 80°≤x≤100°, when the included angle x is less than 80° or greater than 100°, the force of the damping member 6 on the extension portion 4 of the swing arm 2 has a larger component in the extension direction of the extension portion 4 and a smaller component in the direction perpendicular to the extension direction of the extension portion 4, and the stopping effect on the swing arm 2 at the upper swing limit position is poor. Preferably, x is 90°, at this time, there is no component in the extension direction of the extension portion 4, and the stopping effect is the best.

[0112] Correspondingly, the adjustment of the angle x can be realized by adjusting the size of the angle θ, it can be understood that, under the premise that the length of the extension portion 4 is constant, the larger the angle θ, the shorter the length of the damping member 6, in the triangle formed by the first hinged mounting portion 31, the third hinged mounting portion 41 and the fourth hinged mounting portion 61, the distance between the first hinged mounting portion 31 and the third hinged mounting portion 41 is constant, and the distance between the first hinged mounting portion 31 and the fourth hinged mounting portion 61 is also constant, that is, the lengths of two sides of the triangle are constant, and the length of one side is reduced, at this time, the angle of the corresponding angle is increased, and the angle x is also increased, thus, by adjusting the size of the angle θ, the size of the angle x can be adjusted to a certain extent, so as to be adjusted to the range of 80°-100°, of course, it can also be adjusted by adjusting the length of the extension portion 4, or first adjusting the size of the angle θ, and then adjusting the length of the extension portion 4, etc., in the technical solution of the embodiment, by controlling θ in the range of 136°-145°, the size of the angle x can be controlled in the range of 80°-100°.

[0113] The household appliance 1000 can be a dishwasher, an oven, an oven, a refrigerator, etc. The household appliance 1000 comprises a housing 200, a containing cavity 201 is formed in the housing 200, a first shelf 300 is connected in the containing cavity 201 through a lifting mechanism 100, and a utensil to be placed, such as a bowl, a dish, a plate, a chopstick, a fork, etc., a baked food material, or an article to be refrigerated, etc. is arranged on the first shelf 300.

[0114] In the utility model, the user is taken as the reference of the direction, forward is the direction towards the user, or the side of the household appliance 1000 provided with a door body, and backward is the direction opposite to the forward direction, specifically the direction away from the user, and the up-down direction is the direction taken the gravity as the reference.

[0115] 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 the upper shelf and the lower shelf, and in the description of the embodiment of the utility model, the first shelf 300 corresponds to the upper shelf, and the second shelf 400 corresponds to the lower shelf.

[0116] For the first shelf 300, the first shelf 300 needs to be moved out of the containing 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 article to be placed in or out of the first shelf 300, and the user often pulls the first shelf 300 forward. In the movement process of the first shelf 300, a combined movement process occurs, that is, the first shelf 300 moves forward and upward at the same time, and the lifting mechanism 100 moves with the first shelf 300 and supports the first shelf 300.

[0117] The first shelf 300 has several important positions in its movement process, and the common positions include a bottom storage position (as shown in the accompanying drawings), a bottom lifting position (as shown in the accompanying drawings), a top lifting limit position (as shown in the accompanying drawings), and a top locking position (as shown in the accompanying drawings). Figures 2-6 Figures 7-10 Figures 11-15 Figures 16-21

[0118] ​​​​In some embodiments, the first shelf 300 can only have two positions, i.e. the bottom to be lifted position and the top lifting limit position; the first shelf 300 can also have three positions, i.e. the bottom storage position, the bottom to be lifted position and the top lifting limit position, in this case, 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, i.e. the bottom storage position, the bottom to be lifted position, the top lifting limit position and the top locking position, in this case, the top lifting limit position and the top locking position of the first shelf 300 are different positions.

[0119] 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 to be lifted position and the top lifting limit position of the first shelf 300.

[0120] In the existing scheme, when the swing arm 2200 is in the upper swing limit position, it will keep a horizontal state with the fixed wall, at this time, the height of the corresponding first shelf 300 in the top lifting limit position is low, and the user still needs to frequently bend down during use, which is poor user experience.

[0121] In some embodiments, at the upper swing limit position, the swing arm 2 is used to upwardly support the shelf; in the rear-to-front direction, the swing arm 2 is upwardly inclined.

[0122] In the technical scheme of the embodiment, the first shelf 300 is lifted by swinging 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 upwardly support the first shelf 300, and in the rear-to-front direction, the swing arm 2 is upwardly inclined, compared with swinging 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 larger height, reducing the frequent bending of the user during operation, and improving the user experience.

[0123] Without being limited to the upper swing limit position, the included angle of the swing arm 2 with respect to the horizontal direction, in some embodiments, at the upper swing limit position, the center line of the first hinge mounting portion and the center line of the second hinge mounting portion is a first line, the included angle between the first line and the horizontal direction is c, and c is greater than 0° and less than or equal to 70°, the larger 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 realize lifting, and also 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 more reasonable value.

[0124] 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 all within the scope of the present application.

[0125] It should be emphasized that after the first shelf 300 is raised, the main body 3 of the swing arm 2 is inclined upward when the swing arm 2 is in the upper swing limit position. At this time, if the existing swing arm 2200 is directly used, the length of the damping member 6 will be lengthened, resulting in a smaller compression amount of the damping member 6 and a smaller support force that can be provided. Therefore, the size of L needs to be adjusted to further reduce the length of the damping member 6 at the upper swing limit position.

[0126] Correspondingly, 20mm≤L≤100mm, at this time, L is less than or equal to 100mm, so it is much smaller than the length of the extension part 4 of the existing swing arm 2200. When the swing arm 2 is in the upper swing limit position, the length of the damping member 6 can be made smaller, so that its compression amount is larger and the support force that can be provided is more, thereby ensuring the effect of stopping the swing arm 2 from rotating downward at the upper swing limit position.

[0127] In some embodiments, the lifting mechanism 100 further comprises a first guide rail, the first guide rail comprising a plurality of slide rails connected to each other in an extendable and retractable manner, the plurality of slide rails comprising at least a first slide rail 91 and a last slide rail 92, the first slide rail 91 being connected to a connecting member, the second hinge mounting portion 32 being connected to the connecting member, and the last slide rail 92 being used to connect the first shelf 300 of the household appliance 1000, so that the first shelf 300 can be switched between a bottom storage position and a bottom lifting position. By the extension and retraction of the first guide rail, the positional relationship of the first shelf 300 relative to the connecting member can be adjusted, so that the first shelf 300 can be moved to the bottom storage position and stored in the accommodation cavity 201.

[0128] The first guide rail is arranged as a plurality of slide rails. In the technical solution of the present application, the number of slide rails is not limited. For example, the slide rails can be two. For the two slide rails, the first section is the first slide rail 91, and the second section is the last slide rail 92. The slide rails can also be three. For the three slide rails, the first section is the first slide rail 91, the second section is a middle slide rail, and the third section is the last slide rail 92. The slide rails can also be more than three. For the slide rails more than three, the first section is the first slide rail 91, the last section is the last slide rail 92, and the sections between the first slide rail 91 and the last slide rail 92 are middle slide rails. The number of slide rails can be four, five, six, seven, and the like.

[0129] To achieve the above object, the present application further provides a household appliance 1000, comprising a shell 200, a lifting mechanism 100 and a first shelf 300, the shell 200 is formed with a containing cavity 201; the lifting mechanism 100 comprises the lifting mechanism 100 according to any one of the preceding embodiments, the fixed arm 1 of the lifting mechanism 100 is arranged on the side wall 2012 of the containing cavity 201; the first shelf 300 is hingedly connected to the swing arm 2 of the lifting mechanism 100; the lifting mechanism 100 enables the first shelf 300 to switch between a bottom lifting position and a top lifting limit position.

[0130] In some household appliances 1000, there is only one shelf, two shelves, or more shelves. In the technical solution of the present application, a second shelf 400 is further arranged in the containing cavity 201. Correspondingly, at 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 by the user is reduced, and the user experience is improved.

[0131] It should be noted that in the embodiment in which there are two shelves in the household appliance 1000, the first shelf 300 is a lower shelf, and the second shelf 400 is an upper shelf. When the first shelf 300 is at the top storage position and the second shelf 400 is in the containing cavity 201, the first shelf 300 is arranged below the second shelf 400 and is arranged opposite to the second shelf 400.

[0132] In view of the above-mentioned embodiments, the user needs to alternate the use of the first shelf 300 and the second shelf 400, that is, when the first shelf 300 is used to be 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.

[0133] Of course, for the upper end of the first shelf 300 and the upper end of the second shelf 400, in some embodiments, 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.

[0134] Corresponding to the product that 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, and this state has the same operation height as the user when using the upper basket of the dishwasher, or a higher height, and the user's operation experience will be better.

[0135] The following describes the user's use of the household appliance 1000 with reference to the first shelf 300:

[0136] 1. The first shelf 300 is in the bottom storage position, as shown in Figures 2-6

[0137] This state is the state when the user does not use, or just starts to use, or finishes using, in which the first shelf 300 is in the accommodating cavity 201 of the household appliance 1000, as can be seen from Figures 2-6 , the first shelf 300 is stored in the accommodating cavity 201, at this time, the distance between the first guide rail of the first shelf 300 and the second guide rail of the second shelf 400 is the smallest or the distance is the largest, and the swing arm 2 is at the lower limit position.

[0138] 2. The first shelf 300 is in the bottom lifting position, as shown in Figures 7-10

[0139] ​​This state is that the user pulls out the first shelf 300 from the accommodating cavity 201, or the user lowers the first shelf 300 after using the first shelf 300. In these states, the first shelf 300 is at the opening of the accommodating cavity 201, and the first shelf 300 is in the bottom lifting position. Figures 7-10 It can be seen that the interval between the first guide rail head slide rail 91 and the tail slide rail 92 is relatively large or the coinciding distance is small, the first shelf 300 moves forward relative to the accommodating cavity 201, and the swing arm 2 is still at the lower swing limit position.

[0140] 3, the first shelf 300 is in the top lifting limit position, as shown in Figures 11-15

[0141] 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, and the first shelf 300 is in the top locking position. Figures 11-15 It can be seen that the interval between the first guide rail head slide rail 91 and the tail slide rail 92 is relatively large or the coinciding distance is small, the first shelf 300 moves forward relative to the first shelf 300 in the bottom lifting position or the coinciding distance does not change, and the swing arm 2 is at the upper swing limit position.

[0142] 4, the first shelf 300 is in the top locking position, as shown in Figures 16-21

[0143] 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, and the first shelf 300 is in the top locking position. Figures 16-21 It can be seen that the interval between the first guide rail head slide rail 91 and the tail slide rail 92 is relatively large or the coinciding distance is small, the first shelf 300 moves forward relative to the first shelf 300 in the bottom lifting position or the coinciding distance does not change, and the swing arm 2 is at the upper swing limit position.

[0144] The following introduces a complete use process of the user:

[0145] ​​When the user needs to use the household appliance 1000, first open the door body of the household appliance 1000, the user pulls the first shelf 300 out of the containing cavity 201 to the bottom waiting lifting position from the bottom storage position; under the swing 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 waiting 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 to-be-rested articles in the first shelf 300 under the condition of reducing the frequency of bending over;

[0146] When the user finishes taking and placing the to-be-rested articles, 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 waiting lifting position; the user continues to push the first shelf 300 backward to move from the bottom waiting lifting position to the bottom storage position, when the first shelf 300 is in the bottom storage position, the user can close the door body and complete the use of the household appliance 1000.

[0147] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation made under the utility model concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A swing arm for use in a lifting mechanism of a domestic appliance, characterized in that Comprising: a main body, two ends of the main body correspondingly provided with a first hinged mounting portion and a second hinged mounting portion, the first hinged mounting portion used for being hinged to a fixed arm of the lifting mechanism, the second hinged mounting portion used for being directly or indirectly hinged to a first shelf of the household appliance; and an extension portion provided at one end of the main body provided with the first hinged mounting portion, and the extension portion is provided with a third hinged mounting portion used for being hinged to a damping member of the lifting mechanism; wherein, the included angle between the main body and the extension portion is θ, 95°≤θ≤180°.

2. The swing arm of claim 1, wherein 95°≤θ≤165°.

3. The swing arm of claim 2, wherein, θ≥136°; and / or, θ≤145°.

4. The swing arm of claim 1, wherein, The width of the extension portion is tapered in the direction away from the main body; and / or, The main body and the extension portion are integrally provided; and / or, The third hinged mounting portion is provided on the middle line of the width direction of the extension portion; or, The extension portion has a first side and a second side oppositely arranged along the width direction thereof, the first side of the extension portion is located on the side facing away from the fixed arm of the lifting mechanism, and the third hinged mounting portion is provided between the middle line of the width direction of the extension portion and the first side of the extension portion.

5. A lifting mechanism for lifting a first shelf of a household appliance to enable the first shelf to be switched between a bottom, rest position and a top, raised limit position, characterised in that, The lifting mechanism comprises: a fixed arm used for being fixedly installed into a receiving cavity of a housing of a household appliance; a swing arm assembly comprising at least one swing arm, the swing arm being as claimed in any one of claims 1 to 4; and a damping member, two ends of the damping member are provided with a fourth hinged mounting portion and a fifth hinged mounting portion, the fourth hinged mounting portion used for being hinged into the receiving cavity of the housing, and the fifth hinged mounting portion used for being hinged to the third hinged mounting portion of the swing arm.

6. The lifting mechanism of claim 5, wherein, The swing arm has an upper swing limit position and a lower swing limit position on its active stroke; When the swing arm is at the lower swing limit position, a line between the fourth hinged mounting portion and the first hinged mounting portion is a first line, a line between the third hinged mounting portion and the first hinged mounting portion is a second line, and an included angle between the first line and the second line is β, wherein 5°≤β≤20°; and / or, When the swing arm is at the lower swing limit position, a line between the fourth hinged mounting portion and the first hinged mounting portion is a first line, and an included angle between the first line and the main body of the swing arm is α, wherein 90°≤α≤145°.

7. The lifting mechanism of claim 6, wherein, 116°≤α≤140°。 8. The lifting mechanism of claim 6, wherein, When the swing arm is at the upper swing limit position, an included angle between the damping member and the extension portion of the swing arm is x, wherein 80°≤x≤100°.

9. The lifting mechanism of claim 8, wherein, x is 90°.

10. The lifting mechanism of claim 5, wherein, The swing arm has an upper swing limit position and a lower swing limit position on its active stroke, and at the upper swing limit position, the swing arm is used to upwardly support the shelf; In the rear-to-front direction, the swing arm is upwardly inclined; A line between the first hinged mounting portion and the second hinged mounting portion is a third line, and an included angle between the third line and the horizontal direction is c, and 0°<c≤70°.

11. The lifting mechanism of claim 5, wherein, The damping member comprises a gas strut.

12. A household appliance characterized in that, Comprising: a housing formed with a receiving cavity; The lifting mechanism comprises a fixed arm provided on the side wall of the accommodating cavity; and The first shelf is hingedly connected to the swing arm 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.

13. The household appliance according to claim 12, characterized by A second shelf is further provided in the accommodating cavity, and the lower end of the first shelf is arranged to be higher than the lower end of the second shelf at the top lifting limit position.

14. The household appliance according to claim 13, characterized by The household appliance comprises a dishwasher, and the first shelf is arranged as a lower basket and the second shelf is arranged as a lower basket.

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