Six-connecting-rod hinge structure, refrigerator and household appliance

Abstract

The utility model provides a six-connecting-rod hinge structure, a refrigerator and a household electrical appliance, and the six-connecting-rod hinge structure comprises a connecting rod assembly and a springback assembly, the springback assembly comprises a first abutting structure rotationally connected to the first transmission arm, a second abutting structure rotationally connected to the second transmission arm and an elastic piece with the two ends connected to the first transmission arm and the second transmission arm respectively, and the unfolding process of the connecting rod assembly comprises a first stage and a second stage. The first abutting structure and the second abutting structure are separated from each other in the first stage and abut against each other in the second stage. According to the six-connecting-rod hinge structure, the refrigerator and the household appliance, when the connecting rod assembly is closed, the first abutting structure and the second abutting structure are separated from each other at the moment that the second stage is converted into the first stage, under the springback effect of the elastic piece, the connecting rod assembly can be rapidly closed, the self-closing force is large, and the self-closing effect is good. And the condition that the refrigerator door is not closed tightly is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of rotating connection technology, and more specifically, it relates to a six-bar hinge structure, a refrigerator, and a household appliance. Background Technology

[0002] Hinge technology can be used in industries such as large cabinets and refrigerators. In the refrigerator industry, hinge technology was first applied to fully integrated refrigerators with sliding door panels. As the technology matured, the use of hinges in refrigerators and cabinets with fully integrated door panels gradually became a new industry trend. Compared to traditional fully integrated refrigerators with sliding door panels, the hinges need to be lighter and able to be concealed within the refrigerator door. However, currently used hinges have relatively low self-closing force, often resulting in the refrigerator door not closing properly. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a six-link hinge structure, a refrigerator, and a household appliance to solve the technical problem in the prior art where the refrigerator door has a small self-closing force, which makes it easy for the refrigerator door to not close tightly.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a six-bar linkage structure, comprising:

[0005] A linkage assembly includes a first fixed link for fixing to a first structural member, a first transmission arm, a second transmission arm, a third transmission arm, a fourth transmission arm, and a second fixed link for fixing to a second structural member. The two ends of the first transmission arm are respectively hinged to the first fixed link and the fourth transmission arm. The two ends of the second transmission arm are respectively hinged to the first fixed link and the fourth transmission arm. The two ends of the third transmission arm are respectively hinged to the second transmission arm and the second fixed link. The two ends of the fourth transmission arm are respectively hinged to the first transmission arm and the second fixed link.

[0006] The rebound assembly includes a first abutment structure rotatably connected to the first transmission arm, a second abutment structure rotatably connected to the second transmission arm, and an elastic element with its two ends respectively connected to the first transmission arm and the second transmission arm. The unfolding process of the linkage assembly includes a first stage and a second stage. The first abutment structure and the second abutment structure separate from each other in the first stage and abut from each other in the second stage.

[0007] Optionally, the third transmission arm and the second abutment structure are hinged at the same position on the second transmission arm.

[0008] Optionally, the second abutment structure and the elastic element are connected at the same position on the second transmission arm.

[0009] Optionally, the first abutment structure and the elastic element are connected at the same position on the first transmission arm.

[0010] Optionally, the first end of the first abutting structure and the first end of the elastic member are both connected to the first connection point of the first transmission arm, and the second end of the second abutting structure and the second end of the elastic member are both connected to the second connection point of the second transmission arm; in the second stage, the distance between the first connection point and the second connection point remains unchanged.

[0011] Optionally, the first abutting structure is a roller, and the first connection point is located at the center of the roller; the second abutting structure is a sector-shaped cam, and the second connection point is located at the center of the sector-shaped cam.

[0012] Optionally, the angle at which the linkage assembly transitions from the first stage to the second stage is 12 to 20 degrees.

[0013] Optionally, the number of elastic elements is two, which are respectively disposed on opposite sides of the second transmission arm.

[0014] This utility model also proposes a refrigerator, including a cabinet body, a cabinet door, and the aforementioned six-bar linkage structure, wherein the first fixing link is fixed to the cabinet body, and the second fixing link is fixed to the cabinet door.

[0015] This utility model also proposes a household appliance, including the above-mentioned six-bar hinge structure.

[0016] The beneficial effects of the six-bar hinge structure, refrigerator, and household appliances provided by this utility model are as follows: Compared with the prior art, the six-bar hinge structure of this utility model includes a connecting rod assembly and a spring-loaded assembly. The connecting rod assembly is a six-bar assembly. When the first fixed connecting rod and the second fixed connecting rod rotate relative to each other, translation occurs simultaneously, creating a certain distance between the first and second structural members, reducing the space occupied during hinge rotation. By setting the spring-loaded assembly between the first and second transmission arms, the unfolding of the connecting rod assembly is divided into a first stage and a second stage. In the second stage, the first and second abutting structures in the spring-loaded assembly abut against each other. Thus, when the connecting rod assembly closes, at the instant of transitioning from the second stage to the first stage, the first and second abutting structures disengage. Under the rebound action of the elastic element, the connecting rod assembly closes quickly with a large self-closing force, preventing the refrigerator door from not closing tightly. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The three-dimensional structure of the six-bar hinge structure provided in the embodiment of this utility model in the closed state Figure 1 ;

[0019] Figure 2 The three-dimensional structure of the six-bar hinge structure provided in the embodiment of this utility model in the closed state Figure 2 (The first transmission arm is not shown);

[0020] Figure 3 The three-dimensional structure of the six-bar hinge structure provided in the embodiment of this utility model in the unfolded state. Figure 1 ;

[0021] Figure 4 The three-dimensional structure of the six-bar hinge structure provided in the embodiment of this utility model in the unfolded state. Figure 2 (The first transmission arm is not shown);

[0022] Figure 5 An exploded view of the six-bar hinge structure provided in an embodiment of this utility model.

[0023] The following are the labeling elements in the figure:

[0024] 10-Link assembly; 11-First fixed link; 12-Second fixed link; 13-First transmission arm; 14-Second transmission arm; 15-Third transmission arm; 16-Fourth transmission arm; 171-First hinge point; 172-Second hinge point; 173-Third hinge point; 174-Fourth hinge point; 175-Fifth hinge point; 176-Sixth hinge point; 177-Seventh hinge point; 178-Eighth hinge point; 20-Rebound assembly; 21-First abutment structure; 22-Second abutment structure; 23-Elastic element. Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] Hinge technology can be used in industries such as large cabinets and refrigerators. In the refrigerator industry, hinge technology was first applied to fully integrated refrigerators with sliding door panels. As the technology matured, the use of hinges in refrigerators and cabinets with fully integrated door panels gradually became a new industry trend. Compared to traditional fully integrated refrigerators with sliding door panels, the hinges need to be lighter and able to be concealed within the refrigerator door. However, currently used hinges have relatively low self-closing force, often resulting in the refrigerator door not closing properly.

[0030] To alleviate or solve the above technical problems, this utility model proposes a new six-bar linkage structure, including a linkage assembly 10 and a spring-loaded assembly 20. The first fixed link 11 and the second fixed link 12 of the linkage assembly 10 are respectively fixed to the first structural member and the second structural member. When the first structural member rotates relative to the second structural member, the linkage assembly 10 unfolds or folds. The spring-loaded assembly 20 includes a first abutting structure 21 connected to the first transmission arm 13, a second abutting structure 22 connected to the second transmission arm 14, and an elastic member 23. By setting the spring-loaded assembly 20, the unfolding process of the linkage assembly 10 is divided into a first stage and a second stage. When the linkage assembly 10 moves from the second stage to the first stage, the first abutting structure 21 and the second abutting structure 22 switch from an abutting state to a separated state. Therefore, under the restoring force of the elastic member 23, the second structural member automatically springs back relative to the first structural member, causing the linkage assembly 10 to close, increasing the closing force of the six-bar linkage structure, and enabling the linkage assembly 10 to automatically close in the second stage.

[0031] The six-bar hinge structure provided in the embodiments of this utility model will now be described.

[0032] Please refer to the following: Figures 1 to 5 The six-bar linkage structure includes:

[0033] The linkage assembly 10 includes a first fixed link 11, a first transmission arm 13, a second transmission arm 14, a third transmission arm 15, a fourth transmission arm 16, and a second fixed link 12 fixed to the second structure. The two ends of the first transmission arm 13 are respectively hinged to the first fixed link 11 and the fourth transmission arm 16. The two ends of the second transmission arm 14 are respectively hinged to the first fixed link 11 and the fourth transmission arm 16. The two ends of the third transmission arm 15 are respectively hinged to the second transmission arm 14 and the second fixed link 12. The two ends of the fourth transmission arm 16 are respectively hinged to the first transmission arm 13 and the second fixed link 12.

[0034] The rebound assembly 20 includes a first abutting structure 21 rotatably connected to the first transmission arm 13, a second abutting structure 22 rotatably connected to the second transmission arm 14, and an elastic element 23 with its two ends respectively connected to the first transmission arm 13 and the second transmission arm 14. The unfolding process of the linkage assembly 10 includes a first stage and a second stage. The first abutting structure 21 and the second abutting structure 22 separate from each other in the first stage and abut from each other in the second stage.

[0035] The linkage assembly 10 includes six links: a first fixed link 11, a first transmission arm 13, a second transmission arm 14, a third transmission arm 15, a fourth transmission arm 16, and a second fixed link 12. The first fixed link 11 is fixed to a first structural member, and the second fixed link 12 is fixed to a second structural member. When the first and second structural members rotate relative to each other, the linkage assembly 10 unfolds or folds. The angle of rotation of the second structural member relative to the first structural member can be simply referred to as the rotation angle of the linkage assembly 10. The hinge point between the first fixed link 11 and the first transmission arm 13 is the first hinge point 171; the hinge point between the first transmission arm 13 and the fourth transmission arm 16 is the second hinge point 172; the hinge point between the first fixed link 11 and the second transmission arm 14 is the third hinge point 173; the hinge point between the second transmission arm 14 and the third transmission arm 15 is the fourth hinge point 174; the hinge point between the second transmission arm 14 and the fourth transmission arm 16 is the fifth hinge point 175; the hinge point between the third transmission arm 15 and the second fixed link 12 is the sixth hinge point 176; and the hinge point between the fourth transmission arm 16 and the second fixed link 12 is the seventh hinge point 177.

[0036] The rebound assembly 20 includes a first abutting structure 21, a second abutting structure 22, and an elastic member 23. The first abutting structure 21 and the second abutting structure 22 are rotatably connected to the first transmission arm 13 and the second transmission arm 14, respectively. The two ends of the elastic member 23 are connected to the first transmission arm 13 and the second transmission arm 14, respectively.

[0037] By incorporating the spring-loaded component 20, the linkage assembly 10 exhibits two phases during both deployment and closure. During deployment: In the first phase, the first abutting structure 21 and the second abutting structure 22 are separated. As the second fixed link 12 rotates relative to the first fixed link 11, the second fixed link 12 gradually moves away from the first fixed link 11, and the elastic element 23 is gradually stretched. In the second phase, the first abutting structure 21 and the second abutting structure 22 abut against each other, and the elastic element 23 remains in the stretched state. During closure: In the second phase, the first abutting structure 21 and the second abutting structure 22 abut against each other. As the angle of the linkage assembly 10 gradually decreases to a predetermined angle, the first abutting structure 21 and the second abutting structure 22 disengage. The elastic element 23 loses the mutual support of the first abutting structure 21 and the second abutting structure 22, and under the restoring force of the elastic element 23, the linkage assembly 10 quickly closes. When this six-bar hinge structure is applied to a refrigerator, when the refrigerator door is closed, the link assembly 10 of the six-bar hinge rotates from the first stage to the second stage, and the elastic element 23 provides a restoring force to the refrigerator door, so that the refrigerator door closes quickly.

[0038] The six-bar hinge structure in the above embodiment includes a link assembly 10 and a spring-loaded assembly 20. The link assembly 10 is a six-bar assembly. When the first fixed link 11 and the second fixed link 12 rotate relative to each other, they also translate, creating a certain distance between the first and second structural members and reducing the space occupied during hinge rotation. By setting the spring-loaded assembly 20 between the first transmission arm 13 and the second transmission arm 14, the unfolding of the link assembly 10 is divided into a first stage and a second stage. In the second stage, the first abutting structure 21 and the second abutting structure 22 in the spring-loaded assembly 20 abut against each other. Thus, when the link assembly 10 closes, at the instant of transition from the second stage to the first stage, the first abutting structure 21 and the second abutting structure 22 disengage from each other. Under the rebound action of the elastic member 23, the link assembly 10 closes quickly with a large self-closing force, preventing the refrigerator door from not closing tightly.

[0039] Please refer to some embodiments of this utility model. Figures 2 to 4 The third transmission arm 15 and the second abutment structure 22 are hinged at the same position as the second transmission arm 14. The hinge point between the second transmission arm 14 and the third transmission arm 15 is the fourth hinge point 174, and the second abutment structure 22 is also hinged at the fourth hinge point 174.

[0040] The second transmission arm 14, the second abutment structure 22, and the second transmission arm 14 are hinged at the same position, which can make the six-bar linkage structure relatively simple, and make the motion path of the second abutment structure 22 easier to predict, and make it easier to design the first abutment structure 21 and the second abutment structure 22.

[0041] Optionally, a fourth hinge shaft is provided at the fourth hinge point 174, and the fourth hinge shaft passes through the second transmission arm 14, the third transmission arm 15 and the second abutment structure 22.

[0042] In other embodiments, the hinge points of the second transmission arm 14 and the third transmission arm 15, and the hinge points of the second transmission arm 14 and the second abutment structure 22 may also be located at different positions.

[0043] Please refer to some embodiments of this utility model. Figures 2 to 4 The second abutment structure 22 and the elastic element 23 are connected at the same position on the second transmission arm 14. The second transmission arm 14, the third transmission arm 15, and the second abutment structure 22 are all hinged at the fourth hinge point 174, and one end of the elastic element 23 is also connected at the fourth hinge point 174.

[0044] By connecting the second abutment structure 22 and the elastic element 23 at the same position on the second transmission arm 14, there is no need to set a hinge position for the elastic element 23, and the stretching length of the elastic element 23 when the connecting rod assembly 10 rotates can be accurately predicted, which makes it easier to design the elastic element 23.

[0045] In some embodiments, a fourth hinge shaft is provided at the fourth hinge point 174. The fourth hinge shaft passes through the second transmission arm 14, the third transmission arm 15, and the second abutment structure 22, and one end of the elastic member 23 is connected to the fourth hinge shaft.

[0046] In other embodiments, one end of the elastic member 23 may not be connected to the fourth hinge point 174, but may be connected to other positions on the second transmission arm 14.

[0047] Please refer to some embodiments of this utility model. Figures 2 to 4 The first abutment structure 21 and the elastic element 23 are connected at the same position of the first transmission arm 13. The first abutment structure 21 and the first transmission arm 13 are rotatably connected at the eighth hinge point 178, and one end of the elastic element 23 is also connected at the eighth hinge point 178.

[0048] By connecting the first abutment structure 21 and the elastic member 23 to the same position of the first transmission arm 13, there is no need to set an additional connection position for the elastic member 23. This also ensures that the ends of the first abutment structure 21 and the elastic member 23 always move synchronously, making it easier to predict the movement of the first abutment structure 21 and the extension and retraction of the elastic member 23.

[0049] In some embodiments, an eighth hinge shaft is provided at the eighth hinge point 178, the second hinge shaft is provided through the first abutment structure 21 and the first transmission arm 13, and one end of the elastic member 23 is connected to the eighth hinge shaft.

[0050] Please refer to some embodiments of this utility model. Figures 2 to 4 The first abutment structure 21 and the first end of the elastic element 23 are both connected to the first connection point of the first transmission arm 13, and the second end of the second abutment structure 22 and the second end of the elastic element 23 are both connected to the second connection point of the second transmission arm 14. In the second stage, the distance between the first connection point and the second connection point remains unchanged. The two ends of the elastic element 23 are respectively connected to the first connection point and the second connection point, and the first abutment structure 21 and the second abutment structure 22 are also rotatably connected to the first connection point and the second connection point, respectively. By designing the first abutment structure 21 and the second abutment structure 22, the stretching length of the elastic element 23 in each stage can be effectively controlled.

[0051] In the second stage, the distance between the first and second connection points of the linkage assembly 10 remains unchanged, and the length of the elastic element 23 remains unchanged in the second stage. Specifically, when the six-bar linkage is extended, the second fixed link 12 gradually moves away from the first fixed link 11, and the elastic element 23 gradually stretches in the first stage, increasing the rebound force until the six-bar linkage transitions to the second stage, where the first abutting structure 21 and the second abutting structure 22 abut against each other. The length of the elastic element 23 remains unchanged, and the rebound force remains unchanged until the linkage assembly 10 is fully extended. When the six-bar linkage is closed, it first goes through the second stage, where the first abutting structure 21 and the second abutting structure 22 abut against each other, and the rebound force of the elastic element 23 remains unchanged until the first abutting structure 21 and the second abutting structure 22 disengage. Under the action of the rebound force of the elastic element 23, the linkage assembly 10 closes rapidly.

[0052] The first abutting structure 21 and the elastic element 23 are connected at the same position of the first transmission arm 13, and the second abutting structure 22 and the elastic element 23 are connected at the same position of the second transmission arm 14. In this way, by designing the first abutting structure 21 and the second abutting structure 22, the distance between the first connection point and the second connection point can be controlled, thereby controlling the extension and retraction of the elastic element 23 and changing the self-closing force of the connecting rod assembly 10.

[0053] In some embodiments, the first connection point and the eighth hinge point 178 coincide, that is, the first end of the elastic member 23, the first abutment structure 21, and the first transmission arm 13 are connected at the same position. Thus, the movement of the hinge point of the linkage assembly 10 can drive the first abutment structure 21 and the first end of the elastic member 23 to move.

[0054] In some embodiments, the second connection point and the fourth hinge point 174 coincide, that is, the second end of the elastic member 23, the second abutment structure 22, the second transmission arm 14, and the third transmission arm 15 are connected at the same position. Thus, the movement of the hinge point of the linkage assembly 10 can drive the movement of the second abutment structure 22 and the second end of the elastic member 23.

[0055] Please refer to some embodiments of this utility model. Figure 4 and Figure 5 The first abutment structure 21 is a roller, and the second abutment structure 22 is a sector cam. The first connection point is located at the center of the roller, and the second connection point is located at the center of the sector cam. When the connecting rod assembly 10 rotates, the first abutment structure 21 and the second abutment structure 22 rotate accordingly. When the roller and the sector cam rotate and abut against each other, the position between the first connection point and the second connection point remains unchanged.

[0056] By setting the first abutting structure 21 as a roller and the second abutting structure 22 as a fan-shaped cam, the first abutting structure 21 and the second abutting structure 22 can smoothly abut against each other in the second stage, and the distance between the first connection point and the second connection point remains unchanged.

[0057] In other embodiments, the distance L1 from the first connection point to the edge of the first abutment structure 21 can be gradually set, and the distance L2 from the second connection point to the edge of the second abutment structure 22 can be gradually set, as long as the sum of L1 and L2 remains unchanged in the second stage.

[0058] In other embodiments, the second abutment structure 22 is a roller, the second connection point is located at the center of the roller, and the first abutment structure 21 is a sector cam, the first connection point is located at the center of the sector cam.

[0059] In some embodiments of this utility model, the angle at which the linkage assembly 10 transitions from the first stage to the second stage is 12 to 20 degrees. The angle at which the linkage assembly 10 transitions from the first stage to the second stage is understood as the angle of the second fixed link 12 relative to the first fixed link 11 when the linkage assembly 10 is about to transition from the first stage to the second stage.

[0060] The larger the angle at which the linkage assembly 10 transitions from the first stage to the second stage, the larger the angle at which the linkage assembly 10 rebounds, making it less likely to automatically close into place. Conversely, the smaller the angle at which the linkage assembly 10 transitions from the first stage to the second stage, the smaller the translational distance of the second fixed link 12 relative to the first fixed link 11, making it more likely to collide with adjacent walls or other objects. Therefore, the angle at which the linkage assembly 10 transitions from the first stage to the second stage is set to 12 to 20 degrees, such as 15, 16, or 17 degrees.

[0061] Please refer to some embodiments of this utility model. Figure 4 and Figure 5 There are two elastic elements 23, which are respectively set on opposite sides of the second transmission arm 14. When there are two elastic elements 23, the rebound force between the first transmission arm 13 and the second transmission arm 14 is more stable and uniform, avoiding the phenomenon of skewing and jamming when the first transmission arm 13 and the second transmission arm 14 rotate relative to each other.

[0062] In some embodiments, please refer to Figure 4 and Figure 5There are two third drive arms 15. The fourth hinge shaft passes through one of the third drive arms 15, the second drive arm 14, and the other third drive arm 15 in sequence, which makes the structure of the connecting rod assembly 10 more stable. The first end of one elastic element 23 is connected to one end of the eighth hinge shaft, and the first end of the other elastic element 23 is connected to the other end of the eighth hinge shaft; the second end of the other elastic element 23 is connected to one end of the fourth hinge shaft, and the second end of the other elastic element 23 is connected to the other end of the fourth hinge shaft.

[0063] This utility model also provides a refrigerator, which includes the six-bar hinge structure of any of the above embodiments, and also includes a cabinet body and a cabinet door. A first fixed link 11 is fixed to the cabinet body, and a second fixed link 12 is fixed to the cabinet door. That is, the cabinet body is the first structural component mentioned above, and the cabinet door is the second structural component mentioned above. When the cabinet door is closed, the link assembly 10 of the six-bar hinge structure first undergoes a second stage. After the first abutting structure 21 and the second abutting structure 22 disengage from each other, the cabinet door generates a self-closing force under the rebound action of the elastic member 23, thereby automatically closing the cabinet door and reducing the probability of the cabinet door not being closed tightly. When the cabinet door is opened, the link assembly 10 of the six-bar hinge structure first undergoes a first stage, causing the cabinet door to move a certain distance relative to the cabinet body to avoid collision with other nearby items when the cabinet door is opened. Then it transitions to the second stage, where the first abutting structure 21 and the second abutting structure 22 abut against each other, allowing the cabinet door to rotate and open smoothly.

[0064] The refrigerator provided by this utility model adopts the aforementioned six-bar hinge structure. When the first fixed link 11 and the second fixed link 12 rotate relative to each other, they also translate simultaneously, creating a certain distance between the first and second structural members and reducing the space occupied by the hinge during rotation. By setting a spring-loaded assembly 20 between the first transmission arm 13 and the second transmission arm 14, the unfolding of the link assembly 10 is divided into a first stage and a second stage. In the second stage, the first abutting structure 21 and the second abutting structure 22 in the spring-loaded assembly 20 abut against each other. Thus, when the link assembly 10 closes, at the instant of transitioning from the second stage to the first stage, the first abutting structure 21 and the second abutting structure 22 disengage from each other. Under the rebound action of the elastic member 23, the link assembly 10 closes quickly with a large self-closing force, preventing the refrigerator door from not closing tightly.

[0065] This utility model also provides a household appliance, which includes the six-bar hinge structure of any of the above embodiments. The household appliance can be a refrigerator, microwave oven, washing machine, etc. The above-described six-bar hinge structure can be used in any part of the household appliance where there is a rotating structure.

[0066] The household appliance provided by this utility model adopts the aforementioned six-bar hinge structure. When the first fixed link 11 and the second fixed link 12 rotate relative to each other, they also translate simultaneously, creating a certain distance between the first and second structural members and reducing the space occupied by the hinge during rotation. By setting a spring-loaded assembly 20 between the first transmission arm 13 and the second transmission arm 14, the unfolding of the link assembly 10 is divided into a first stage and a second stage. In the second stage, the first abutting structure 21 and the second abutting structure 22 in the spring-loaded assembly 20 abut against each other. Thus, when the link assembly 10 closes, at the instant of transitioning from the second stage to the first stage, the first abutting structure 21 and the second abutting structure 22 disengage from each other. Under the rebound action of the elastic member 23, the link assembly 10 closes quickly with a large self-closing force, preventing the refrigerator door from not closing tightly.

[0067] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A six-bar linkage structure, characterized by, The application relates to a six-link hinge structure, comprising: a link assembly, comprising a first fixed link fixed to a first structural member, a first transmission arm, a second transmission arm, a third transmission arm, a fourth transmission arm and a second fixed link fixed to a second structural member, two ends of the first transmission arm being hingedly connected to the first fixed link and the fourth transmission arm respectively, two ends of the second transmission arm being hingedly connected to the first fixed link and the fourth transmission arm respectively, two ends of the third transmission arm being hingedly connected to the second transmission arm and the second fixed link respectively, and two ends of the fourth transmission arm being hingedly connected to the first transmission arm and the second fixed link respectively; a rebound assembly, comprising a first abutting structure rotatably connected to the first transmission arm, a second abutting structure rotatably connected to the second transmission arm and an elastic member having two ends connected to the first transmission arm and the second transmission arm respectively, the unfolding process of the link assembly comprising a first stage and a second stage, the first abutting structure and the second abutting structure being separated from each other in the first stage and abutting against each other in the second stage.

2. The six-bar linkage structure of claim 1, wherein The third transmission arm and the second abutting structure are hingedly connected to the same position of the second transmission arm.

3. The six-bar linkage structure of claim 2, wherein, The second abutting structure and the elastic member are connected to the same position of the second transmission arm.

4. The six-bar linkage structure of claim 3, wherein The first abutting structure and the elastic member are connected to the same position of the first transmission arm.

5. The six-bar linkage structure of claim 1, wherein, The first abutting structure and a first end of the elastic member are connected to a first connecting point of the first transmission arm, and the second abutting structure and a second end of the elastic member are connected to a second connecting point of the second transmission arm; in the second stage, the distance between the first connecting point and the second connecting point is unchanged.

6. The six-bar linkage structure of claim 5, wherein, The first abutting structure is a roller, the first connecting point is located at the center of the roller, the second abutting structure is a sector cam, and the second connecting point is located at the center of the sector cam.

7. The six-bar linkage structure according to any one of claims 1 to 6, wherein The angle of the link assembly when converting from the first stage to the second stage is 12-20 degrees.

8. The six-bar linkage structure of any one of claims 1-6, wherein, The number of the elastic members is two, and the elastic members are arranged on opposite sides of the second transmission arm.

9. A refrigerator characterized by comprising: The application further relates to a cabinet, comprising a cabinet body, a cabinet door and the six-link hinge structure according to any one of claims 1-8, the first fixed link being fixed to the cabinet body, and the second fixed link being fixed to the cabinet door.

10. A domestic appliance characterized in that: The application further relates to a cabinet, comprising the six-link hinge structure according to any one of claims 1-8.

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