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, and a third hinge mounting part is arranged on the extension part; the distance L between the third hinged installation part and the first hinged installation part is larger than or equal to 20 mm and smaller than or equal to 170 mm. On the premise that other existing conditions are not changed, when the swing arm is located at the position where the extension part and the damping piece are collinear, the length of the extension part is reduced, the length of the damping piece can be increased, and therefore the maximum compression amount of the damping piece is reduced, and the service life and the long-term stability of the damping piece are guaranteed.

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 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 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 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.

[0005] During the movement of the swing arm, the extension of the swing arm will have a position collinear with the damping member. At this time, the length of the extension of the existing swing arm is relatively long, and the compression amount of the damping member is relatively large, resulting in low length reliability of the damping member. SUMMARY

[0006] The main purpose of the 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, which is arranged at one end of the main body provided with the first hinged mounting part, and a third hinged mounting part is arranged on the extension, the third hinged mounting part is used for hinged cooperation with the damping member of the lifting mechanism.

[0010] The distance from the third hinged mounting part to the first hinged mounting part is L, and 20mm≤L≤170mm.

[0011] In an embodiment, 20mm≤L≤100mm.

[0012] In an embodiment, the width of the extension portion is tapered in a direction away from the main body; and / or,

[0013] The main body and the extension portion are integrally arranged; and / or,

[0014] The third hinged mounting portion is arranged on a midline of the extension portion in the width direction; or,

[0015] 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 outside the angle region of the main body and the extension portion, and the third hinged mounting portion is arranged between the midline of the extension portion in the width direction and the first side of the extension portion.

[0016] To achieve the above object, the 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:

[0017] A fixed arm is arranged to be fixedly mounted in a receiving cavity of a housing of the household appliance;

[0018] An oscillating arm assembly comprises at least one oscillating arm, the oscillating arm being as described in any one of the above embodiments; and,

[0019] A damping member has a fourth hinged mounting portion and a fifth hinged mounting portion oppositely arranged along the length direction thereof, the fourth hinged mounting portion is arranged to be hinged to the receiving cavity of the housing, and the fifth hinged mounting portion is arranged to be hinged to the third hinged mounting portion of the oscillating arm.

[0020] In an embodiment, the oscillating arm has an upper swing limit position and a lower swing limit position on the active stroke thereof, corresponding to the upper swing limit position, the oscillating arm is arranged to upwardly prop the shelf;

[0021] In a rear-to-front direction, the oscillating arm is arranged to be upwardly inclined.

[0022] In an embodiment, a first line connecting the center of the first hinged mounting portion and the center of the second hinged mounting portion has an included angle c with the horizontal direction, and 0°<c≤70°.

[0023] In an embodiment, when the oscillating arm is at the upper swing limit position, an included angle x between the damping member and the extension portion of the oscillating arm is 80°≤x≤100°.

[0024] In an embodiment, x is 90°.

[0025] In an embodiment, the damping member comprises an air spring.

[0026] To achieve the above object, the present application further provides a household appliance, comprising:

[0027] a housing formed with a receiving cavity;

[0028] a lifting mechanism comprising the lifting mechanism as claimed in any one of the preceding embodiments, a fixed arm of the lifting mechanism being arranged on a side wall of the receiving cavity; and

[0029] a first shelf hingedly connected to a swing arm of the lifting mechanism;

[0030] The lifting mechanism enables the first shelf to switch between a bottom storage position and a top lifting limit position.

[0031] In an embodiment, a second shelf is further arranged in the receiving cavity, and a lower end of the first shelf is arranged to be higher than a lower end of the second shelf at the top lifting limit position.

[0032] In an embodiment, the household appliance comprises a dishwasher, and the first shelf is arranged as a lower basket.

[0033] In the technical scheme provided by the present application, the distance from the third hinged mounting portion to the first hinged mounting portion is set to 20mm-170mm, which is smaller than the length of the existing extension portion, and when the swing arm is at a position where the extension portion and the damping member are collinear, the length of the extension portion is reduced, the length of the damping member is increased, and thus the maximum compression amount of the damping member is reduced, and the service life and long-term stability of the damping member are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical scheme 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 according to the structures shown in these drawings without creative labor for those skilled in the art.

[0035] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of an existing lifting mechanism;

[0036] Figure 2 FIG. 1 is a structural schematic diagram of an embodiment of an existing lifting mechanism;

[0037] Figure 3 Fig. 1 is a front view of a household appliance according to the present application; Figure 2 Fig. 2 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0038] Figure 4 Fig. 3 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism; Figure 2 Fig. 4 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0039] Figure 5 Fig. 5 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism; Figure 2 Fig. 6 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0040] Figure 6 Fig. 7 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 2 Fig. 8 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0041] Figure 7 Fig. 9 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 2 Fig. 10 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0042] Figure 8 Fig. 11 is a front view of a household appliance according to the present application; Figure 7 Fig. 12 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0043] Figure 9 Fig. 13 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 7 Fig. 14 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0044] Figure 10 Fig. 15 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 7 Fig. 16 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0045] Figure 11 Fig. 17 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 2 Fig. 18 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0046] Figure 12 Fig. 19 is a front view of a household appliance according to the present application; Figure 11 Fig. 20 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0047] Figure 13 Fig. 21 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf; Figure 11 Fig. 22 is a perspective view of the household appliance according to the present application, which comprises a lifting mechanism and a first shelf;

[0048] Figure 14 Fig. 23 is a magnified view of detail A in Fig. 22; Figure 13 Fig. 24 is a magnified view of detail A in Fig. 22; Fig. 25 is a magnified view of detail A in Fig. 22;

[0049] Fig. 26 is a magnified view of detail A in Fig. 22; Figure 15 Fig. 27 is a magnified view of detail A in Fig. 22; Figure 11 Fig. 28 is a magnified view of detail A in Fig. 22; Fig. 29 is a magnified view of detail A in Fig. 22;

[0050] Fig. 30 is a magnified view of detail A in Fig. 22; and Figure 16 Fig. 31 is a magnified view of detail A in Fig. 22.Figure 2 Fig. 1 is a perspective view of a household appliance in which the first shelf is in the top locking position and the swing arm of the lifting mechanism is in the upper swing limit position;

[0051] Figure 17 Fig. 2 is a front view of the household appliance in Fig. 1; Figure 16

[0052] Figure 18 Fig. 3 is a perspective view of the household appliance in Fig. 1, which contains the lifting mechanism and the first shelf; Figure 16

[0053] Figure 19 Fig. 4 is an enlarged view of B in Fig. 3; Figure 18

[0054] Figure 20 Fig. 5 is a perspective view of the lifting mechanism in Fig. 1; Figure 16

[0055] Figure 21 Fig. 6 is a schematic view of the mounting structure of the damping member and the swing arm in Fig. 1; Figure 16

[0056] Fig. 7 is a schematic view of the state of the extension of different lengths and the damping member in the upper swing limit position. Figure 22 BRIEF DESCRIPTION OF THE DRAWINGS

[0057] 100, lifting mechanism; 1, fixed arm; 2, swing arm; 3, main body; 4, extension; 31, first hinged mounting part; 32, second hinged mounting part; 41, third hinged mounting part; 6, damping member; 61, fourth hinged mounting part; 62, fifth hinged mounting part; 91, head section sliding rail; 92, tail section sliding rail;

[0058] 1000, household appliance; 200, shell; 201, accommodating cavity; 2012, side wall; 300, first shelf; 400, second shelf;

[0059] 2000, lifting mechanism; 2100, damping member; 2200, swing arm.

[0060] The realization, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings.

[0061] DETAILED DESCRIPTION

[0062] ​​​​​The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0063] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0064] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0065] Currently, some household appliances with double-layer shelves, such as dishwashers and ovens, often raise the lower shelf when taking out or putting in items, thereby reducing the angle and number of times the user has to bend over and improving the user experience.

[0066] Please see Figure 1 In order to improve the user's experience during the lifting process of the shelf, a lifting mechanism 2000 is usually set up. The lifting mechanism 2000 includes a swing arm 2200 and a damping component 2100. The damping component 2100 can extend and retract, thereby converting potential energy into kinetic energy during the lifting process of the shelf, achieving the effect of saving effort.

[0067] During the swing arm movement, the extension of the swing arm 2200 may be collinear with the damping element 2100. At this time, the extension of the existing swing arm 2200 is relatively long, resulting in a large compression of the damping element 2100 and thus low length stability of the damping element 2100.

[0068] In order to solve the above problems, the utility model provides a swing arm 2, lifting mechanism 100 and domestic appliance 1000, Figures 2-21 The utility model provides domestic appliance 1000's specific embodiment.

[0069] Please refer to Figures 2-6 And Figure 21 The swing arm 2 is used in the lifting mechanism 100 of domestic appliance 1000, including main body 3 and extension 4, the both ends of main body 3 are provided with first hinged mounting portion 31 and second hinged mounting portion 32, first hinged mounting portion 31 is used to hinge to fixed arm 1 of lifting mechanism 100, second hinged mounting portion 32 is used to directly or indirectly hinge to first shelf 300 of domestic appliance 1000, extension 4 is arranged in the one end of main body 3 provided with first hinged mounting portion, and third hinged mounting portion 41 is arranged on extension 4, and third hinged mounting portion 41 is used to hinge cooperation between damping piece 6 of lifting mechanism 100, wherein the distance of third hinged mounting portion 41 to first hinged mounting portion 31 is L, and 20mm≤L≤170mm.

[0070] The utility model provides technical scheme, through the distance of third hinged mounting portion 41 to first hinged mounting portion 31 is set as 20mm~170mm, and it is smaller than the length of the extension of prior art, when swing arm 2 is at the position of extension 4 and damping piece 6 collinear, the length of extension 4 is reduced, can let the length of damping piece 6 be big, thereby the maximum compression of damping piece 6 is reduced, and the life and long-term stability of damping piece 6 are guaranteed.

[0071] Need to explain, the specific implementation form of domestic appliance 1000 is not limited to washing machine, refrigerator, oven and the like, which is not limited here. The setting position of third hinged mounting portion 41 is not limited, which can be opened in the middle of extension 4, or in the end away from main body 3. It can be understood that the distance between third hinged mounting portion 41 and first hinged mounting portion 31 of main body 3 is the force arm of damping piece 6 driving main body 3, the greater the distance, the smaller the driving force of damping piece 6 driving main body 3. Therefore, in an embodiment, third hinged mounting portion 41 is opened in the end of extension 4 away from main body 3. Moreover, the specific implementation form of third hinged mounting portion 41 is not limited, which can be in the form of rotating protrusion, or in the form of rotating hole, etc., which is not limited here.

[0072] 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 always in a compressed state, thereby being able to output a thrust force outwardly. It can be understood that the shorter the length of the damping member 6 is, the greater the thrust force it can output is. The damping member 6 has a fourth hinged mounting portion 61 and a fifth hinged mounting portion 62 arranged oppositely 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 housing 200, and the fifth hinged mounting portion 62 is hinged 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 mounted, and its position in the accommodating cavity 201 will not change. Specifically, it can be hinged to the inner wall of the accommodating cavity 201 or to the fixed arm 1, which is not limited herein. In an embodiment, the damping member 6 is a gas strut.

[0073] And, referring to Figure 1 and Figure 21 , the distance from the third hinged mounting portion 41 to the first hinged mounting portion 31 of the existing swing arm 2200 is generally 200 mm, while in the present application, the distance from the third hinged mounting portion 41 to the first hinged mounting portion 31 is less than or equal to 170 mm. Correspondingly, when the swing arm 2 is at the position where the extension portion 4 and the damping member 6 are collinear, and the same damping member 6 is adopted, the length of the damping member 6 can be at least 30 mm longer than that of the damping member 2100 of the existing lifting mechanism 2000. In the collinear position, which is generally the maximum compression position of the damping member 6, the maximum compression amount of the damping member 6 is reduced by at least 30 mm, so that it will not be excessively compressed, thereby ensuring its service life and improving its long-term stability.

[0074] When the distance from the third hinged mounting portion 41 to the first hinged mounting portion 31 is greater than 170 mm, on the one hand, it will cause the length of the damping member 6 to be smaller and the support force to be smaller when the swing arm is at the uppermost limit position. On the other hand, it will cause the compression amount of the damping member 6 to be too large when the swing arm is at the collinear position. In addition, the distance space between the first shelf 300 and the second shelf 400 is limited, which causes the stroke of the damping member 6 to be unable to balance the maximum stroke and the minimum stroke.

[0075] And, the force applied by the damping member 6 to the swing arm 2 can be decomposed into a component force along the extension direction of the extension part 4 and a tangential force perpendicular to the extension direction of the extension part 4, the component force is counteracted by the reaction force of the first hinged mounting part of the main body 3, and the tangential force can drive the swing arm to rotate or stop. The distance between the third hinged mounting part 41 and the first hinged mounting part 31 is the size of the force arm of the tangential force applied by the damping member 6 to the swing arm 2, therefore, the distance cannot be too small, otherwise, the support force output by the damping member 6 needs to be large, and the damping member 6 needs to be compressed very short, which is not conducive to the service life of the damping member 6, therefore, L≥20mm, so that the damping member 6 does not need to output too large support force, and the damping member 6 does not need to be compressed very short.

[0076] Please refer to Figure 22 , Figure 22 The state diagrams of the extension part 4 and the damping member 6 with different lengths at the upper swing limit position are shown in Figure 22 It can be clearly seen from the diagrams that when the swing arm 2 is at the upper swing limit position, the length of the damping member 6 is smaller than the height in the field when L is 200mm, that is, when the length of L is set to 20mm-170mm, the damping member 6 can be compressed shorter at the upper swing limit position, thereby providing greater support force.

[0077] In an embodiment, the height of the first shelf 300 at the upper swing limit position is higher than the height of the existing first shelf 300 at the upper swing limit position. Specifically, when the swing arm 2200 of the existing lifting mechanism 2000 is at the upper swing limit position, the main body 3 of the swing arm 2 is generally in a horizontal state, and after the first shelf 300 is lifted, the main body 3 of the swing arm 2 is inclined upward when the swing arm 2 is at 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, thereby causing the compression amount of the damping member 6 to be smaller and the support force that can be provided to be smaller. 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.

[0078] Please refer to Figure 22, 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 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 the 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, so when 20mm≤L≤100mm, even if the first shelf 300 is lifted higher, the first shelf 300 can be better supported.

[0079] The movement trajectory of the third hinged mounting portion 41 of the extension 4 is a circumferential swing with the first hinged mounting portion 31 as the center, so when a tangential force is applied to the extension 4, the extension 4 can be better driven to rotate or stop rotating, so 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 4 of the swing arm 2 is decomposed into two components, one of which is in the extension direction of the extension 4, and the other is in a direction that is 90° to the extension direction of the extension 4, and the size of the other component determines the size of the acceleration of the extension 4 of the swing arm 2, thereby achieving the rotation or stop of the extension 4, in order to better stop the swing arm 2, the included angle x between the damping member 6 and the extension 4 of the swing arm 2 is 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 4 of the swing arm 2 has a larger component in the extension direction of the extension 4 and a smaller component in the direction that is 90° to the extension direction of the extension 4, and the stopping effect on the swing arm 2 at the upper swing limit position is poor. Most preferably, x is 90°, at which time the component in the extension direction of the extension 4 is 0, and the stopping effect is best.

[0080] When L is 100mm, under the condition that other conditions remain unchanged, the value of X is about 75°, which is greater than the existing angle, 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 on the first shelf 300 at the upper limit position is better.

[0081] Based on the above 20mm≤L≤100mm, the following sub-embodiments are included but not limited to:

[0082] First sub-embodiment: 70mm<L≤100mm, please refer to Figure 2-6When L 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 prior art, the damping member 6 can output greater force, and the included angle X is larger than the prior art, 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 4 is smaller, and the rotation stopping effect on the swing arm 2 is better than the prior art.

[0083] The second subdivided embodiment: 20mm≤L≤70mm, at this time, the corresponding is 80°≤X≤100°, when L is 20mm, the corresponding X is about 100°, when L is 70mm, the corresponding X is about 80°, at this time, compared with the first subdivided 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 4 is smaller, and the rotation stopping effect on the swing arm 2 is better than the first subdivided embodiment.

[0084] 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 2 is the best, and through numerous experiments, it is found that when L is 48mm, X can be approximately 90°, at this time, the rotation stopping effect on the swing arm 2 is the best.

[0085] 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 supporting 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, in this way, in the technical solution of the 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, which can make the pushing force transmitted by the damping member 6 more concentrated, and the width is tapered, which also improves the stability of the transmission.

[0086] 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 connection 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.

[0087] 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.

[0088] 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 located outside the included angle region of the main body 3 and the extension part 4, 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 embodiment, the setting position of the first hinged mounting part is closer to the first side of the extension part 4 than 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 upper swing limit position, thereby being able to provide greater support force.

[0089] In order to achieve the above-mentioned purpose, the application further provides 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 lifting position and a top lifting limit position, 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 in 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 hinged to the receiving cavity 201 of the shell 200, and the fifth hinged mounting part 62 is hinged to the third hinged mounting part 41 of the swing arm 2.

[0090] 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 arranged on the two sides of the first hinged mounting part 31, in the process that 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, in the process that 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 kinetic energy of the swing arm 2, thereby playing a role of saving labor in the lifting process of the first shelf 300.

[0091] When the first shelf 300 is lifted to the top position of lifting limit, the distance from the third hinged mounting part 41 to the first hinged mounting part 31 of the existing swing arm 2200 is large, which causes 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, for this, the distance from the third hinged mounting part 41 to the first hinged mounting part 31 is set to 20mm-170mm, which is smaller than the length of the existing extension part, when the swing arm 2 is at the position that the extension part 4 is collinear with the damping member 6, the length of the extension part 4 is reduced, which can make the length of the damping member 6 larger, thereby reducing the maximum compression amount of the damping member 6, guaranteeing the service life and long-term stability of the damping member 6, and under the premise that other existing conditions are unchanged, when the swing arm 2 is at the upper swing limit position, the length of the damping member 6 can be increased, thereby providing larger supporting force.

[0092] It should be noted that the specific composition 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 swing arm 2 and the connecting rod are hinged to the connecting arm and the fixed arm 1 at both ends, the connecting arm is used to install 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 form a parallelogram, so that the first shelf 300 always maintains an approximately horizontal state during lifting, avoiding the first shelf 300 from shaking during lifting.

[0093] The household appliance 1000 can be a dishwasher, an oven, an oven and 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, baked food or cold storage articles, etc. are arranged on the first shelf 300.

[0094] In the utility model, the user is used as the reference direction, forward is the direction towards the user, or the side of the household appliance 1000 provided with the 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 taking gravity as the reference.

[0095] 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.

[0096] 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 articles to be placed in or out of 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, and the lifting mechanism 100 moves and supports the first shelf 300 at this time.

[0097] The first shelf 300 has several important positions during its movement, commonly including a bottom storage position (as shown in the attached image). Figures 7-10 (As shown), the bottom position to be lifted (as attached) Figures 11-15 (as shown), the top lifting limit position (as attached) Figures 16-21 (as shown) and the top locking position (as attached) Figure 1 (As shown).

[0098] In some embodiments, the first shelf 300 may have only two positions: a bottom lifting position and a top lifting limit position. Alternatively, the first shelf 300 may have three positions: a bottom storage position, a bottom lifting position, and a top lifting limit position. In this case, the top lifting limit position and the top locking position of the first shelf 300 may be the same position. Or, the first shelf 300 may have four positions: a bottom storage position, a bottom lifting position, a top lifting limit position, and a top locking position. In this case, the top lifting limit position and the top locking position of the first shelf 300 are different positions.

[0099] For the lifting mechanism 100, the main function of the lifting mechanism 100 is to lift the first shelf 300. The action of the lifting mechanism 100 can correspond only to the bottom position to be lifted and the top lifting limit position of the first shelf 300.

[0100] Please see Figures 2-6 The existing solution keeps the swing arm 2200 horizontal with the fixed wall when it is at its upper limit position. At this time, the height of the corresponding first shelf 300 at the top lifting limit position is relatively low, and users still need to bend over frequently during use, resulting in a poor user experience.

[0101] In some embodiments, corresponding to the upper limit position, the swing arm 2 is used to support the shelf upward; along the rear to front direction, the swing arm 2 is inclined upward.

[0102] In this embodiment, 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. In the direction from back to front, the swing arm 2 is tilted upward. 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.

[0103] The angle between the swing arm 2 and the horizontal direction when the swing arm 2 is not limited at the upper swing limit position corresponds to the angle between the first connecting line and the horizontal direction when the swing arm 2 is at the upper swing limit position in some embodiments. The first connecting line is a line connecting the center of the first hinged mounting portion and the center of the second hinged mounting portion. The angle c between the first connecting line and the horizontal direction 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 the cooperation of the swing arm 2 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.

[0104] It should be noted that the angle can be an integer value of 70°, or any integer value between 0° and 70°, such as 10°, 20°, 30°, 40°, 50°, 60°, and the like. Of course, it can also be an angle value between any two of the above integer values, such as 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, and the like between 0° and 10°. It can also be a degree between 10° and 20°, a degree between 20° and 30°, a degree between 30° and 40°, a degree between 40° and 50°, a degree between 50° and 60°, and of course, it can also be a decimal degree value. The above values are within the scope of the present application.

[0105] It should be noted that when the first shelf 300 is lifted, the main body 3 of the swing arm 2 is inclined upward when the swing arm 2 is at 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, thereby reducing the compression amount of the damping member 6 and the 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.

[0106] Correspondingly, 20mm≤L≤100mm. At this time, L is less than or equal to 100mm, which is much smaller than the length of the extension of the existing swing arm 2200. When the swing arm 2 is at the upper swing limit position, the length of the damping member 6 can be made smaller, thereby increasing the compression amount and the support force that can be provided, thereby ensuring the effect of stopping the swing arm 2 from rotating downward at the upper swing limit position.

[0107] In some embodiments, the lifting mechanism 100 further comprises a first guide rail, the first guide rail comprising a plurality of sections of slide rails connected to each other in a telescopic sliding manner, the plurality of sections of slide rails comprising at least a first section of slide rail 91 and a last section of slide rail 92, the first section of slide rail 91 being connected to a connecting piece, the second hinged mounting portion 32 being connected to the connecting piece, and the last section of slide rail 92 being used to connect a 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 to be lifted position, and by the telescopic movement of the first guide rail, 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 accommodating cavity 201.

[0108] The first guide rail is provided as a plurality of sections of slide rails, and the number of the sections of slide rails is not limited in the technical solution of the utility model, for example, the number of the sections of slide rails can be two, for the two sections of slide rails, the first section is the first section of slide rail 91, and the second section is the last section of slide rail 92; the number of the sections of slide rails can also be three, for the three sections of slide rails, the first section is the first section of slide rail 91, the second section is a middle section of slide rail, and the third section is the last section of slide rail 92; the number of the sections of slide rails can also be more than three, for the plurality of sections of slide rails more than three, the first section is the first section of slide rail 91, the last section is the last section of slide rail 92, and the sections of slide rails between the first section of slide rail 91 and the last section of slide rail 92 are all middle sections of slide rail, and the number of the sections of slide rails can be four, five, six, seven, etc.

[0109] To achieve the above object, the application further provides a household appliance 1000, comprising a shell 200, a lifting mechanism 100 and a first shelf 300, the shell 200 being formed with an accommodating cavity 201; the lifting mechanism 100 comprises any one of the lifting mechanisms 100 described above, and the fixed arm 1 of the lifting mechanism 100 is arranged on a side wall 2012 of the accommodating cavity 201; the first shelf 300 is hingedly connected to the swing arm 2 of the lifting mechanism 100; and the lifting mechanism 100 enables the first shelf 300 to be switched between a bottom to be lifted position and a top lifting limit position.

[0110] In some household appliances 1000, there is only one shelf, two shelves or more shelves, and the technical solution of the utility model further comprises a second shelf 400 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, so that the lifting height is large, the frequency of bending over by the user is reduced, and the user experience is improved.

[0111] It should be noted that in the embodiment of the household appliance 1000 having two shelves, the first shelf 300 is a lower shelf, and the second shelf 400 is an upper shelf. When the first shelf 300 is in the top storage position and the second shelf 400 is in the accommodation cavity 201, the first shelf 300 is below the second shelf 400 and arranged oppositely.

[0112] 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 accommodation cavity 201 as much as possible; when the second shelf 400 is used, the first shelf 300 is kept in the accommodation cavity 201 as much as possible, or the second shelf 400 is not lifted as much as possible.

[0113] 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.

[0114] Corresponding to the product of the household appliance 1000 being a dishwasher, the first shelf 300 corresponds to a lower basket of the dishwasher, and the second shelf 400 corresponds to an 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.

[0115] The following describes the user's use of the household appliance 1000 with reference to the first shelf 300:

[0116] 1. The first shelf 300 is in the bottom storage position, as shown in Figures 2-6

[0117] This state is the state of non-use, initial use, or use completion of the user. In these states, the first shelf 300 is in the accommodation cavity 201 of the household appliance 1000, and the second shelf 400 is in the top storage position, as shown in Figures 7-10 ​As shown in the figure, the first shelf 300 is accommodated in the accommodating cavity 201, and the distance between the first guide rail's first section slide rail 91 and tail section slide rail 92 is the smallest or the distance of coincidence is the largest, and the swing arm 2 is at the lower swing limit position.

[0118] 2. The first shelf 300 is at the bottom position to be lifted, as shown in the figure. Figures 7-10

[0119] This state is that the user pulls out the first shelf 300 from the accommodating cavity 201 or lowers the first shelf 300 after use. In these states, the first shelf 300 is at the opening of the accommodating cavity 201, and the first shelf 300 is at the bottom position to be lifted. Figures 11-15 As shown in the figure, the distance between the first guide rail's first section slide rail 91 and tail section slide rail 92 is relatively large or the distance of coincidence is relatively small, and 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.

[0120] 3. The first shelf 300 is at the top position to be lifted, as shown in the figure. Figures 11-15

[0121] This state is that the user lifts the first shelf 300 or exits the locking state after use. In these states, the first shelf 300 is at the maximum height of lifting, and the first shelf 300 is at the top position to be lifted. Figures 16-21 As shown in the figure, the distance between the first guide rail's first section slide rail 91 and tail section slide rail 92 is relatively large or the distance of coincidence is relatively small, and the distance between the first guide rail's first section slide rail 91 and tail section slide rail 92 relative to the first shelf 300 at the bottom position to be lifted or the distance of coincidence is unchanged, and the swing arm 2 is at the upper swing limit position.

[0122] 4. The first shelf 300 is at the top locking position, as shown in the figure. Figures 16-21

[0123] This state is that the user lifts the first shelf 300 and locks it. At this time, the user can take and place the articles to be placed. In these states, the first shelf 300 is at the maximum height of lifting, and the first shelf 300 is at the top locking position. ​ As shown in the figure, the distance between the first guide rail's first section slide rail 91 and tail section slide rail 92 is the largest or the distance of coincidence is the smallest, and the first shelf 300 moves forward relative to the top position to be lifted at the top locking position, and the swing arm 2 is still at the upper swing limit position.

[0124] The following introduces a complete use process of the user:​​​

[0125] When the user needs to use the household appliance 1000, first open the door body of the household appliance 1000, the user pulls out the first shelf 300 from the bottom storage position to the bottom lifting position in the forward direction; 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 lifting position to the top lifting limit position; the user continues to pull the first shelf 300 forward, and the first shelf 300 moves from the top lifting limit position to the top locking position, in the locked state, the user can take and place the to-be-rested articles in the first shelf 300 under the condition of reducing the frequency of bending over;

[0126] 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 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 body and complete the use of the household appliance 1000.

[0127] The above is only the preferred embodiment of the present application, and does not limit the patent range of the present application, 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 The utility model relates to a household appliance, comprising: 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 hinged to a first shelf of the household appliance directly or indirectly; and an extension part is arranged at one end of the main body provided with the first hinged mounting part, and a third hinged mounting part is arranged on the extension part, the third hinged mounting part is used for being hinged to a damping part of the lifting mechanism; wherein the distance from the third hinged mounting part to the first hinged mounting part is L, 20mm<=L<=170mm.

2. The swing arm of claim 1, wherein 20mm<=L<=100mm; or, 20mm<=L<=70mm.

3. The swing arm of claim 1, wherein, The width of the extension part is tapered in the direction away from the main body; and / or, The main body and the extension part are integrally arranged; and / or, The third hinged mounting part is arranged on the middle line of the width direction of the extension part; or, The extension part has a first side and a second side arranged oppositely along the width direction thereof, the first side of the extension part is located outside the angle region of the main body and the extension part, and the third hinged mounting part is arranged between the middle line of the width direction of the extension part and the first side of the extension part.

4. 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, which is used for being fixedly mounted into a containing space of a shell of the household appliance; a swing arm assembly, which comprises at least one swing arm, and the swing arm is the swing arm as claimed in any one of claims 1 to 3; and a damping part, two ends of the damping part are provided with a fourth hinged mounting part and a fifth hinged mounting part, the fourth hinged mounting part is used for being hinged into the containing space of the shell, and the fifth hinged mounting part is hinged to the third hinged mounting part of the swing arm.

5. The lifting mechanism of claim 4, wherein, The swing arm has an upper swing limit position and a lower swing limit position on its active stroke, and the swing arm is used for supporting the shelf upwardly at the upper swing limit position; In the rear-to-front direction, the swing arm is upwardly inclined.

6. The lifting mechanism of claim 5, wherein, The center line of the first hinged mounting part and the center line of the second hinged mounting part are a first line, the included angle between the first line and the horizontal direction is c, and 0<=c<=70.

7. The lifting mechanism of claim 6, wherein, When the swing arm is at the upper swing limit position, the included angle between the damping part and the extension part of the swing arm is x, wherein 80<=x<=100.

8. The lifting mechanism of claim 7, wherein, x is 90.

9. The lifting mechanism of claim 4, wherein, The damping part comprises an air strut.

10. A household appliance characterized in that, The utility model relates to a household appliance, comprising: a shell, which is formed with an accommodating cavity; a lifting mechanism, which comprises the lifting mechanism as claimed in any one of claims 4 to 9, and the fixed arm of the lifting mechanism is arranged on the side wall of the accommodating cavity; and a first shelf, which is hingedly connected to the swing arm 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.

11. The household appliance according to claim 10, characterized by A second shelf is further arranged 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.

12. The household appliance according to claim 11, characterized by 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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