Refrigerator

Abstract

The utility model provides a refrigerator, belongs to the technical field of household appliances, and aims to solve the technical problem of large external force required when a door body of a related refrigerator is opened. According to the refrigerator, the elastic piece is additionally arranged in the hinge, the elastic piece abuts against and is matched with the first edge in the at least partial angle range in the door body closing process so as to generate elastic deformation to provide assistance for opening of the hinge, and the elastic force of the elastic piece to the first edge has two perpendicular component forces; wherein the direction of one component force passes through the axis of the first pivot shaft, and the direction of the other component force deviates from the front wall of the box body. The component force pointing to the front wall deviating from the box body can push the first edge in the direction deviating from the front wall of the box body, so that the second end of the second connecting rod rotates in the direction deviating from the front wall of the box body, the door body is driven to rotate in the direction deviating from the front wall of the box body, assisting force for opening the door is formed, and external force needed in the door body opening process is reduced; and the process of opening the door body is more labor-saving.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of household appliances, and in particular to a refrigerator. Background Art

[0002] The refrigerator includes a box body, a door body and a hinge. The box body is formed with a receiving cavity for accommodating food or other items. The door body is movably arranged on the box body through the hinge so as to close or open the receiving cavity through the door body.

[0003] In the related art, the hinge includes six links. When the refrigerator needs to be embedded in a cabinet, the hinge can control the door body to bypass the edge of the cabinet and move the door body outward during the opening process, so as to avoid interference between the door body and the cabinet during the opening process and avoid the door body blocking the accommodating cavity.

[0004] However, when the refrigerator door needs to be opened, a large force needs to be manually applied to the door to fully open the door, which makes it more laborious to open the door. Utility Model Content

[0005] The embodiment of the present application provides a refrigerator, which can solve the technical problem that a large external force is required to open the door of related refrigerators.

[0006] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0007] Box;

[0008] A door body, which is arranged on the door side of the box body;

[0009] and a hinge, through which the door body is rotatably connected to the box body;

[0010] The hinge comprises:

[0011] A fixing seat connected to the box;

[0012] A hinge arm connected to the door body;

[0013] A transmission assembly comprises a first link, a second link, a third link and a fourth link, wherein the first end of the first link and the first end of the second link are both pivotally connected to the fixed seat, the first end of the second link is farther away from the front wall of the box body than the first end of the first link, the first end of the third link and the first end of the fourth link are both pivotally connected to the hinge arm, the first end of the third link is closer to the side wall of the box body close to the fixed seat than the first end of the fourth link, the second end of the first link is pivotally connected to the second end of the fourth link, the second end of the third link is pivotally connected to the first link, the second end of the second link is pivotally connected to the third link via a first pivot shaft, the circumferential side wall of the second end of the second link is configured with a pressing portion, the pressing portion comprises a first edge, and the distance between the first edge and the axis of the first pivot shaft gradually decreases from an end away from the first end of the second link to an end close to the first end of the second link;

[0014] A spring sheet, both ends of which are connected to the two ends of the third connecting rod. During the closing process of the door body, the spring sheet presses against the first edge within at least a partial angle range to generate elastic deformation to assist the opening of the hinge. The elastic force of the spring sheet on the first edge has two mutually perpendicular components, one of which is directed through the axis of the first pivot shaft, and the other is directed away from the front wall of the box body.

[0015] The refrigerator in the embodiment of the present application has a component force directed toward the front wall away from the box body, which has a force arm that causes the second connecting rod to rotate away from the front wall of the box body around the first pivot axis. Therefore, the component force can push the first edge in the direction away from the front wall of the box body, causing the second end of the second connecting rod to rotate in the direction away from the front wall of the box body, thereby driving the door body to rotate away from the front wall of the box body, forming an assisting force for opening the door, reducing the external force required in the process of opening the door body, and making the process of opening the door body more labor-saving.

[0016] In some embodiments of the present application, the pressing portion also includes a curved segment, the first edge is closer to the front wall of the box body than the curved segment, the curved segment rotates around the axis of the first pivot axis during the rotation of the door body, and the spring sheet presses against the curved segment within at least a partial angle range during the rotation of the door body to generate elastic deformation, and the direction of the elastic force of the spring sheet on the curved segment points to the first pivot axis.

[0017] With such arrangement, when the door body is rotating and the spring sheet and the curved section are pressed against each other, the direction of the elastic force of the spring sheet on the curved section is directed from the spring sheet to the curved section and to the first pivot axis. Therefore, the force arm from the rotation axis of the first pivot axis to the elastic force is small, and the elastic force is not easy to generate a force arm for rotating the second connecting rod around the first pivot axis. After the external force for opening or closing the door applied to the door body is released, the door body can easily be suspended to facilitate taking and placing items from the accommodating cavity.

[0018] In some embodiments of the present application, the pressing portion further includes a second edge, the second edge is farther away from the front wall of the box body than the curved segment, and the distance between the second edge and the axis of the first pivot axis gradually increases from an end away from the curved segment to an end close to the curved segment;

[0019] The spring sheet presses against the second edge within at least a partial angle range during the closing process of the door body, thereby generating elastic deformation to assist the closing of the hinge. The elastic force of the spring sheet on the second edge has two mutually perpendicular components, one of which is directed through the axis of the first pivot shaft, and the other is directed toward the first connecting rod.

[0020] With such arrangement, when the door body is closing, when the spring sheet is pressed against the second edge, the elastic force of the spring sheet on the second edge has a force arm that causes the second end of the second connecting rod to rotate about the first pivot axis toward the front wall of the box body, so that the elastic force forms an assisting force for closing the door, thereby reducing the external force required to close the door body and making it more labor-saving to close the door body.

[0021] In some embodiments of the present application, the first edge includes a first curved surface and a first plane connected to each other, and the first curved surface is connected to the curved segment;

[0022] The second edge includes a second curved surface and a second flat surface connected to each other, and the second curved surface is connected to the curved line segment.

[0023] Such an arrangement improves the consistency between the angle range in which the spring-assisted door body is opened and the angle range in which it hovers, and also improves the consistency between the angle range in which the spring-assisted door body is closed and the angle range in which it hovers.

[0024] In some embodiments of the present application, the first edge includes a first curved surface and a first plane connected to each other, and the first curved surface is connected to the curved segment; the second edge includes a second curved surface and a second plane connected to each other, and the second curved surface is connected to the curved segment;

[0025] The first curved surface and the second curved surface are both arc surfaces.

[0026] This arrangement reduces the variation range of the damping effect of the spring on the hinge during the rotation of the door body, making the door body smoother when opening or closing.

[0027] In some embodiments of the present application, the spring sheet includes a matching protrusion, the matching protrusion protrudes toward the pressing portion, and the matching protrusion and the pressing portion press and fit with each other.

[0028] With such an arrangement, when the length between the first end and the second end of the spring sheet remains unchanged, a matching protrusion is constructed on the spring sheet, which can increase the unfolded length of the spring sheet, thereby increasing the deformation of the spring sheet, and further increasing the elastic force of the matching protrusion on the pressing part, thereby improving the damping effect of the spring sheet on the door body, the door closing assistance and the door opening assistance.

[0029] In some embodiments of the present application, a side of the mating protrusion facing the pressing portion is a curved surface.

[0030] Such an arrangement can make the matching protrusion more easily deformed when pressed by the pressing part, thereby increasing the elastic force of the matching protrusion on the pressing part, improving the damping effect of the spring sheet on the door body, and enhancing the door closing and opening assistance.

[0031] In some embodiments of the present application, the first end of the spring sheet is disposed around the pivot axis between the third connecting rod and the first connecting rod, and the second end of the spring sheet is disposed around the pivot axis between the third connecting rod and the hinge arm.

[0032] Such an arrangement reduces the difficulty of assembling the first end of the spring sheet and the second pivot shaft, thereby reducing the difficulty of assembling the second end of the spring sheet and the third pivot shaft.

[0033] In some embodiments of the present application, the thickness of the spring sheet is between 1.5 mm and 2.5 mm, and the ratio of the thickness of the spring sheet to the unfolded length of the spring sheet is between 0.01 and 0.03.

[0034] In this way, the thickness of the spring sheet is between 1.5 mm and 2.5 mm, which can prevent the spring sheet from fatigue fracture and reduce the external force required when opening and closing the door. The ratio of the thickness of the spring sheet to the unfolded length of the spring sheet is between 0.01 and 0.03, so that the spring sheet can be bent and formed, making it easy to produce.

[0035] In a second aspect, an embodiment of the present application provides a refrigerator, comprising a cabinet, a door and a hinge;

[0036] The hinge comprises:

[0037] A fixing seat connected to the box;

[0038] A hinge arm connected to the door body;

[0039] A transmission assembly, comprising a first link, a second link, a third link and a fourth link, wherein the first end of the first link and the first end of the second link are both pivotally connected to the fixing seat, the first end of the second link is farther away from the front wall of the box body than the first end of the first link, the first end of the third link and the first end of the fourth link are both pivotally connected to the hinge arm, the first end of the third link is closer to the side wall of the box body close to the fixing seat than the first end of the fourth link, the second end of the first link is pivotally connected to the second end of the fourth link, the second end of the third link is pivotally connected to the first link, the second end of the second link is pivotally connected to the third link via a first pivot shaft, and the circumferential side wall of the second end of the second link is configured with a first edge;

[0040] The two ends of the spring sheet are connected to the two ends of the third connecting rod. The spring sheet presses against the first edge within at least a partial angle range during the closing process of the door body to generate elastic deformation to provide assistance for opening the hinge.

[0041] In the refrigerator of the embodiment of the present application, the spring sheet provides assistance to the hinge when opening, so that the external force required to open the door body is reduced, thereby making it easier to open the door body. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0043] Figure 1 This is a schematic diagram of the structure of the refrigerator according to an embodiment of the present application from a first viewing angle when the door is at the maximum opening angle;

[0044] Figure 2 This is a schematic structural diagram of a refrigerator according to an embodiment of the present application from a first perspective when the door is in a closed state;

[0045] Figure 3 This is a schematic structural diagram of the refrigerator according to an embodiment of the present application from a second viewing angle when the door is in a closed state;

[0046] Figure 4 This is a schematic diagram of the structure of the refrigerator according to the embodiment of the present application from a second viewing angle when the door is at the maximum opening angle;

[0047] Figure 5 This is a schematic structural diagram of a refrigerator according to an embodiment of the present application when the door is in a closed state;

[0048] Figure 6This is a schematic structural diagram of a refrigerator according to an embodiment of the present application when the door opening angle is 30°;

[0049] Figure 7 This is a schematic structural diagram of a refrigerator according to an embodiment of the present application when the door opening angle is 60°;

[0050] Figure 8 This is a schematic structural diagram of a refrigerator according to an embodiment of the present application when the door opening angle is 90°;

[0051] Fig. 9 This is a schematic structural diagram of a refrigerator according to an embodiment of the present application when the door is opened to the maximum door opening angle;

[0052] Fig.10 A schematic diagram of the structure of a spring piece of a hinge in an embodiment of the present application;

[0053] Fig.11 A schematic diagram of a second connecting rod of a hinge according to an embodiment of the present application from a first perspective;

[0054] Fig.12 This is a schematic diagram from a second perspective of the second connecting rod of the hinge of an embodiment of the present application.

[0055] Description of reference numerals:

[0056] 1-Box;

[0057] 2- portal;

[0058] 3- Hinge;

[0059] 31-fixed seat; 32-hinge arm;

[0060] 33-transmission assembly; 331-first connecting rod;

[0061] 332-second connecting rod; 335-pressing portion;

[0062] 336-curve segment; 338-second edge;

[0063] 3381- second curved surface; 3382- second plane;

[0064] 337 - first edge; 333 - third connecting rod;

[0065] 3371-first curved surface; 3372-first plane;

[0066] 334 - fourth connecting rod; 301 - first pivot axis;

[0067] 302 - second pivot axis; 303 - third pivot axis;

[0068] 304 - fourth pivot axis; 305 - fifth pivot axis;

[0069] 306 - sixth pivot axis; 307 - seventh pivot axis;

[0070] 34-shrapnel; 341-first end;

[0071] 342-second end; 343-matching protrusion;

[0072] 344-Ontology segment;

[0073] 4-Cabinet;

[0074] 41-end face; 42-edge. DETAILED DESCRIPTION

[0075] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0076] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0077] In addition, the terms "including" and "having" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components explicitly listed but may include other components not explicitly listed or inherent to such products or devices.

[0078] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0079] The terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0080] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0081] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0082] refer to Figure 1 The refrigerator of the embodiment of the present application includes a box body 1, a door body 2 and a hinge 3. The box body 1 is formed with a receiving cavity for receiving food or other items. The opening of the receiving cavity faces the door side of the box body 1. The door body 2 is arranged on the door side of the box body 1. The door body 2 is rotatably connected to the box body 1 through the hinge 3, so that the receiving cavity is closed or opened through the door body 2.

[0083] refer to Figure 2 and Figure 3 The refrigerator of the embodiment of the present application can be embedded in the cabinet 4 during installation. After installation, the outer side of the door body 2 can be flush with the end surface 41 of the cabinet 4, and an edge 42 is formed between the side of the cabinet 4 facing the box body 1 and the end surface 41 of the cabinet 4.

[0084] refer to Figure 4 The hinge 3 includes a fixing seat 31, a hinge arm 32 and a transmission assembly 33. The fixing seat 31 is connected to the box body 1, the hinge arm 32 is connected to the door body 2, and the transmission assembly 33 is connected between the fixing seat 31 and the hinge arm 32.

[0085] refer to Figure 5 The transmission assembly 33 may include a first connecting rod 331 , a second connecting rod 332 , a third connecting rod 333 and a fourth connecting rod 334 .

[0086] The first connecting rod 331 has a first end, and the first end of the first connecting rod 331 is pivotally connected to the fixing base 31 .

[0087] The second connecting rod 332 has a first end, and the first end of the second connecting rod 332 is farther away from the front wall of the box body 1 than the first end of the first connecting rod 331. The front wall of the box body 1 refers to the side of the box body 1 facing the door body 2. The first end of the second connecting rod 332 is pivotally connected to the fixing seat 31.

[0088] The third link 333 has a first end, and the first end of the third link 333 is pivotally connected to the hinge arm 32 .

[0089] The fourth connecting rod 334 has a first end, and the first end of the fourth connecting rod 334 is farther away from the side wall of the box body 1 close to the fixing seat 31 than the first end of the third connecting rod 333. The side wall of the box body 1 refers to both sides of the box body 1 along the width direction X. The first end of the fourth connecting rod 334 is pivotally connected to the hinge arm 32.

[0090] The first connecting rod 331 has a second end. The second end of the first connecting rod 331 and the first end of the first connecting rod 331 are respectively located at two ends of an extending direction of the first connecting rod 331 .

[0091] The fourth link 334 has a second end, and the second end of the fourth link 334 and the first end of the fourth link 334 are respectively located at two ends of the extension direction of the fourth link 334. The second end of the fourth link 334 is pivotally connected to the second end of the first link 331.

[0092] The third link 333 has a second end, and the second end of the third link 333 and the first end of the third link 333 are respectively located at two ends of the extension direction of the third link 333. The second end of the third link 333 is pivotally connected to the first link 331, and the projection of the second end of the third link 333 on the first link 331 is located between the first end of the first link 331 and the second end of the first link 331.

[0093] The second connecting rod 332 has a second end, and the second end of the second connecting rod 332 and the first end of the second connecting rod 332 are respectively located at two ends of the extension direction of the second connecting rod 332. The second end of the second connecting rod 332 is pivotally connected to the third connecting rod 333, and the projection of the second end of the second connecting rod 332 on the third connecting rod 333 is located between the first end of the third connecting rod 333 and the second end of the third connecting rod 333.

[0094] The first link 331 and the second link 332 are both pivotally connected to the fixing seat 31. The first link 331 is closer to the front wall of the box body 1 than the second link 332. The third link 333 and the fourth link 334 are both pivotally connected to the hinge arm 32. The third link 333 is closer to the side wall of the box body 1 close to the fixing seat 31 than the fourth link 334.

[0095] The third link 333 and the fourth link 334 are also pivotally connected to the first link 331. The first link 331, the third link 333, the fourth link 334 and the hinge arm 32 form a quadrilateral. The end of the second link 332 facing away from the fixing seat 31 is pivotally connected to the third link 333. The fixing seat 31, the first link 331, the second link 332 and the third link 333 form a quadrilateral.

[0096] The third link 333 can rotate relative to the first link 331 around the second pivot axis 302. The hinge arm 32 can rotate relative to the third link 333 around the third pivot axis 303. The third link 333 can rotate relative to the second link 332 around the first pivot axis 301. The second link 332 can rotate relative to the fixing seat 31 around the fourth pivot axis 304. The first link 331 can rotate relative to the fixing seat 31 around the fifth pivot axis 305. The fourth link 334 can rotate relative to the first link 331 around the sixth pivot axis 306. The hinge arm 32 can rotate relative to the fourth link 334 around the seventh pivot axis 307.

[0097] That is, the third link 333 can rotate relative to the first link 331 around the axis of the second pivot shaft 302. The hinge arm 32 can rotate relative to the third link 333 around the axis of the third pivot shaft 303. The third link 333 can rotate relative to the second link 332 around the axis of the first pivot shaft 301. The second link 332 can rotate relative to the fixing seat 31 around the axis of the fourth pivot shaft 304. The first link 331 can rotate relative to the fixing seat 31 around the axis of the fifth pivot shaft 305. The fourth link 334 can rotate relative to the first link 331 around the axis of the sixth pivot shaft 306. The hinge arm 32 can rotate relative to the fourth link 334 around the axis of the seventh pivot shaft 307.

[0098] The first link 331 , the third link 333 , the fourth link 334 and the hinge arm 32 form a quadrilateral, that is, the axis of the second pivot shaft 302 , the axis of the third pivot shaft 303 , the axis of the sixth pivot shaft 306 and the axis of the seventh pivot shaft 307 are connected and form a quadrilateral.

[0099] The fixing seat 31 , the first connecting rod 331 , the second connecting rod 332 and the third connecting rod 333 form a quadrilateral, that is, the axis of the second pivot shaft 302 , the axis of the first pivot shaft 301 , the axis of the fourth pivot shaft 304 and the axis of the fifth pivot shaft 305 are connected and form a quadrilateral.

[0100] refer to Figure 5-Figure 9 When the door body 2 is opened, the hinge 3 changes its position under the restraint of the above two quadrilaterals, so that the hinge arm 32 moves outward along the depth direction Y of the refrigerator and outward along the width direction X of the refrigerator, thereby driving the door body 2 to move outward along the depth direction Y of the refrigerator and outward along the width direction X of the refrigerator.

[0101] It should be noted that, outward along the depth direction Y of the refrigerator refers to the direction from the box body 1 to the fixing seat 31 along the depth direction Y of the refrigerator. Figure 5The positive direction of the direction Y shown in FIG. Outward along the width direction X of the refrigerator refers to the direction from the box body 1 to the cabinet 4 along the width direction X of the refrigerator, for example Figure 5 The positive direction of X is shown in .

[0102] This can not only increase the maximum opening angle of the door body 2, for example, make the maximum opening angle of the door body 2 greater than 90°, thereby reducing the possibility of the door body 2 blocking the accommodating cavity; it can also enable the second connecting rod 332 and the third connecting rod 333 to form an avoidance area. After the opening angle of the door body 2 is greater than 90°, the avoidance area can avoid the edge 42 of the cabinet 4, thereby reducing the possibility of the door body 2 interfering with the cabinet 4 during the opening process.

[0103] In some possible implementations of the present application, reference is made to Figure 5-Figure 9 The hinge 3 may include a spring sheet 34. The spring sheet 34 is elastic and will be elastically deformed and have elastic force under the action of external force.

[0104] In some possible embodiments, the spring 34 may be a leaf spring, which has a simple structure, reliable operation, low cost and easy maintenance.

[0105] The two ends of the elastic sheet 34 in the extension direction can be connected to the two ends of the third connecting rod 333. One side of the elastic sheet 34 faces the second connecting rod 332, and the other side faces the fourth connecting rod 334.

[0106] In some possible embodiments, the elastic sheet 34 may have a first end 341. The first end 341 of the elastic sheet 34 is located at one end of the extension direction of the elastic sheet 34.

[0107] In some possible embodiments, reference Figure 5 and Fig.10 The first end 341 of the spring sheet 34 is bent and wound around the second pivot shaft 302 to reduce the difficulty of assembling the first end 341 of the spring sheet 34 and the second pivot shaft 302 .

[0108] In some possible embodiments, the elastic sheet 34 may have a second end 342. The second end 342 of the elastic sheet 34 and the first end 341 of the elastic sheet 34 are respectively located at two ends of the extension direction of the elastic sheet 34.

[0109] In some possible embodiments, reference Figure 5 and Fig.10 The second end 342 of the spring sheet 34 is bent and arranged around the third pivot shaft 303 to reduce the difficulty of assembling the second end 342 of the spring sheet 34 and the third pivot shaft 303 .

[0110] refer to Figure 5In some possible implementations of the embodiment of the present application, the circumferential side wall of the second connecting rod 332 at one end away from the fixing seat 31 is configured with a pressing portion 335. That is, the circumferential side wall of the second end of the second connecting rod 332 may be configured with a pressing portion 335.

[0111] During the opening or closing process of the door body 2 , the spring piece 34 presses against the pressing portion 335 within at least a partial angle range, thereby generating elastic deformation to achieve a damping effect on the movement of the hinge 3 .

[0112] During the process of opening or closing the door body 2, when the spring piece 34 is pressed against the pressing part 335, the spring piece 34 is squeezed by the pressing part 335 to undergo elastic deformation and exert an elastic force F on the pressing part 335. The direction of the elastic force F is from the spring piece 34 to the pressing part 335. The elastic force F increases the pressure between the spring piece 34 and the pressing part 335, thereby increasing the frictional resistance to rotation between the spring piece 34 and the pressing part 335, thereby achieving a certain damping effect on the movement of the hinge 3.

[0113] When the door body 2 is opened to a certain door opening angle and the external door opening force or door closing force applied to the door body 2 is released, the damping effect from the spring 34 can reduce the rotation speed of the door body 2 relative to the box body 1, thereby reducing the angle at which the door body 2 continues to rotate under the influence of inertia, deadweight or manufacturing deviation.

[0114] In some possible implementations of the present application, reference is made to Figure 5-Figure 11 The pressing portion 335 may include a curved segment 336 .

[0115] During the process of opening or closing the door body 2, when the spring piece 34 is pressed against the curved segment 336, the spring piece 34 is squeezed by the curved segment 336 to undergo elastic deformation and exert an elastic force F on the curved segment 336. The direction of the elastic force F is from the spring piece 34 to the curved segment 336. The elastic force F increases the pressure between the spring piece 34 and the curved segment 336, thereby increasing the frictional resistance to rotation between the spring piece 34 and the curved segment 336, thereby achieving a certain damping effect on the movement of the hinge 3.

[0116] In some possible implementations of the embodiments of the present application, the curved segment 336 may be an arc shape, and the curved segment 336 may also have a certain deviation relative to the arc shape, as long as the curved segment 336 as a whole conforms to the law of rotation around the axis of the first pivot shaft 301 during the rotation of the door body 2.

[0117] In an implementation in which the curved segment 336 is in an arc shape, the axis corresponding to the curved segment 336 may be colinear with the axis of the first pivot shaft 301 .

[0118] When the door body 2 is rotating, when the spring piece 34 and the curved segment 336 are pressed against each other, the direction of the elastic force F of the curved segment 336 exerted by the spring piece 34 is directed from the spring piece 34 to the curved segment 336 and to the first pivot axis 301. Therefore, the force arm from the rotation axis of the first pivot axis 301 to the elastic force F is small, and the elastic force F is not easy to generate a force arm for rotating the second connecting rod 332 around the first pivot axis 301. After the external force for opening or closing the door applied to the door body 2 is released, the door body 2 can easily be suspended to facilitate taking and placing items from the accommodating cavity.

[0119] Among them, after the door body 2 is opened to a certain opening angle under the action of external force, when the external force is released, the door body 2 maintains the opening angle before the external force is released, which is called the door body 2 achieving hovering.

[0120] It should be noted that the direction of the elastic force F pointing to the first pivot axis 301 can be the direction of the elastic force F passing through the axis of the first pivot axis 301, or the direction of the elastic force F can have a certain deviation relative to the axis of the first pivot axis 301, as long as the elastic force F is not easy to generate a force arm that causes the second connecting rod 332 to rotate around the first pivot axis 301.

[0121] In some possible implementations of the embodiments of the present application, when the door body 2 is opened from a first set angle to a second set angle (the second set angle is greater than the first set angle), the curved segment 336 presses against the spring piece 34. In this process, after the external force for opening the door body 2 is released, the spring piece 34 achieves a certain damping effect on the movement of the hinge 3.

[0122] In some possible implementations of the present application, reference 6 and Figure 7 The first setting angle can be greater than 0°, and the second setting angle can be equal to 90°, so that when the opening angle of the refrigerator door is between the first setting angle and 90°, the spring piece 34 has a damping effect on the movement of the hinge 3.

[0123] In some possible implementations of the present application, reference is made to Figure 5-Figure 10 , Fig.12 The pressing portion 335 may include a first edge 337 .

[0124] The first edge 337 is closer to the front wall of the box body 1 than the curved segment 336 .

[0125] During the opening process of the door body 2, when the spring sheet 34 is pressed against the first edge 337, the elastic force F of the spring sheet 34 on the first edge 337 has a force arm that causes the second end of the second connecting rod 332 to rotate around the first pivot axis 301 away from the front wall of the box body 1. The elastic force F forms an assisting force for opening the door, thereby reducing the external force required in the process of opening the door body 2 and making the process of opening the door body 2 more labor-saving.

[0126] In some possible implementations of the present application, reference is made to Fig. 9 When the door body 2 is opened, when the first edge 337 and the spring sheet 34 are pressed together, the elastic force F of the spring sheet 34 on the first edge 337 has two mutually perpendicular components, one of which F1 is directed through the axis of the first pivot shaft 301, and the other F2 is directed away from the front wall of the box body 1.

[0127] The component force F2 that deviates from the front wall of the box body 1 has a force arm that causes the second connecting rod 332 to rotate away from the front wall of the box body 1 around the first pivot axis 301. Therefore, the component force F2 can push the first edge 337 in the direction away from the front wall of the box body 1, causing the second end of the second connecting rod 332 to rotate in the direction away from the front wall of the box body 1, driving the door body 2 to rotate away from the front wall of the box body 1, forming an assisting force for opening the door, thereby reducing the external force required in the process of opening the door body 2, making the process of opening the door body 2 more labor-saving.

[0128] The force component F1 directed toward the axis of the first pivot axis 301 does not have a force arm for rotating the second link 332 around the first pivot axis 301. Therefore, the force component F1 increases the pressure between the spring sheet 34 and the first edge 337, thereby increasing the friction resistance of rotation between the spring sheet 34 and the first edge 337, thereby achieving a certain damping effect on the movement of the hinge 3. When the external force applied to the door body 2 to open the door is released, the damping effect from the spring sheet 34 can buffer at least part of the force to open the door or the force to close the door, so that the door body 2 can be opened slowly.

[0129] In some possible implementations of the present application, the distance between the first edge 337 and the axis of the first pivot shaft 301 gradually decreases from an end away from the fourth pivot shaft 304 to an end close to the fourth pivot shaft 304. That is, the distance between the first edge 337 and the axis of the first pivot shaft 301 gradually decreases from an end away from the first end of the second connecting rod 332 to an end close to the first end of the second connecting rod.

[0130] During the opening process of the door body 2, the spring sheet 34 first presses against the end of the first edge 337 away from the fourth pivot axis 304, and as the opening angle of the door body 2 gradually increases, the spring sheet 34 gradually presses against the end of the first edge 337 close to the fourth pivot axis 304. Since the distance between the first edge 337 and the axis of the first pivot axis 301 gradually decreases from the end away from the fourth pivot axis 304 to the end close to the fourth pivot axis 304, as the opening angle of the door body 2 gradually increases, the compression amount of the spring sheet 34 by the first edge 337 gradually decreases, and the damping effect and door opening assistance of the spring sheet 34 on the hinge 3 also gradually decrease, thereby reducing the resistance of the door body when closing the door at the position where the spring sheet 34 presses against the end of the first edge 337 close to the fourth pivot axis 304.

[0131] In some possible implementations of the embodiments of the present application, when the opening angle of the door body 2 is between the fourth set angle and the fifth set angle, the first edge 337 presses against the spring piece 34 so that the spring piece 34 provides assistance to the door body 2 in opening the door.

[0132] The fourth setting angle is greater than or equal to the second setting temperature.

[0133] In some possible implementations of the present application, reference is made to Figure 8 and Fig. 9 , the fourth setting angle may be greater than 0°. The fifth setting angle is greater than the fourth setting angle. The fifth setting angle is less than or equal to the maximum door opening angle of the door body 2.

[0134] The maximum door opening angle of the refrigerator can be set according to actual needs. In the present embodiment, the maximum door opening angle of the refrigerator can be 115°.

[0135] In some possible implementations of the present application, reference is made to Fig.11 and Fig.12 The first edge 337 may include a first curved surface 3371. The elastic force F of the spring sheet 34 on the first curved surface 3371 has a force arm that allows the second end of the second connecting rod 332 to rotate around the first pivot axis 301 away from the front wall of the box body 1, so that the spring sheet 34 has a certain opening force on the door body 2.

[0136] The first curved surface 3371 may protrude toward the spring sheet 34. Compared with the implementation mode in which the first curved surface 3371 is recessed in the direction away from the spring sheet 34, the first curved surface 3371 protrudes toward the spring sheet 34, so as to facilitate the spring sheet 34 and different positions on the first curved surface 3371 to achieve a press fit, improve the contact rate between the spring sheet 34 and each position of the first curved surface 3371, reduce the possibility that the spring sheet 34 and part of the first curved surface 3371 cannot achieve a press fit, and improve the stability of the press fit between the first curved surface 3371 and the spring sheet 34.

[0137] In some possible implementations of the embodiments of the present application, the first curved surface 3371 can be an arc surface, so that the distance between the first curved surface 3371 and the axis of the first pivot axis 301 increases smoothly from one end of the first curved surface 3371 close to the fourth pivot axis 304 to the end away from the fourth pivot axis 304, thereby reducing the variation range of the damping effect of the spring 34 on the hinge 3 during the rotation of the door body 2, and making the door body 2 smoother when opening or closing.

[0138] In some possible implementations of the present application, the first edge 337 may include a first plane 3372. The elastic force F of the spring 34 on the first plane 3372 has a force arm that allows the second end of the second connecting rod 332 to rotate around the first pivot axis 301 away from the front wall of the box body 1, so that the spring 34 has a certain door opening force on the door body 2. The first plane 3372 may be connected to the first curved surface 3371.

[0139] In some possible implementations of the embodiment of the present application, the first edge 337 may be adjacent to the curved segment 336 , that is, the fourth setting angle may be equal to the second setting angle, so as to improve the continuity of the damping effect of the spring sheet 34 on the hinge 3 .

[0140] The first curved surface 3371 of the first edge 337 is connected to the curved segment 336 .

[0141] In some possible implementations of the present application, reference is made to Figure 5-Figure 9 , Fig.11 The pressing portion 335 may include a second edge 338. The second edge 338 is further away from the front wall of the box body 1 than the curved segment 336.

[0142] During the closing process of the door body 2, when the spring sheet 34 is pressed against the second edge 338, the elastic force F of the spring sheet 34 on the second edge 338 has a force arm that causes the second end of the second connecting rod 332 to rotate around the first pivot axis 301 toward the front wall of the box body 1, so that the elastic force F forms an assisting force for closing the door, thereby reducing the external force required for closing the door body 2 and making it easier to close the door body 2.

[0143] In some possible implementations of the present application, reference is made to Figure 5 The elastic force F of the spring piece 34 on the second edge 338 has two mutually perpendicular components, wherein the direction of one component F1 passes through the axis of the first pivot shaft 301 , and the direction of the other component F2 points to the first connecting rod 331 .

[0144] The component force F2 directed toward the first connecting rod 331 has a force arm that causes the second connecting rod 332 to rotate around the first pivot axis 301 toward the front wall of the box body 1. Therefore, the component force F2 can push the second edge 338 toward the first connecting rod 331, causing the second end of the second connecting rod 332 to rotate toward the front wall of the box body 1, driving the door body 2 to rotate toward the front wall of the box body 1, forming an assisting force for closing the door, reducing the external force required to close the door body 2, and making it more labor-saving to close the door body 2.

[0145] The force component F1 pointing to the axis of the first pivot axis 301 does not have a force arm that causes the second connecting rod 332 to rotate around the first pivot axis 301, so the function of the force component F1 is to increase the pressure between the spring sheet 34 and the second edge 338, thereby increasing the friction resistance of the rotation between the spring sheet 34 and the second edge 338, and then achieving a certain damping effect on the movement of the hinge 3. When the external force applied to the door body 2 to close the door is released, the damping effect from the spring sheet 34 can buffer at least part of the door opening force or door closing force, so that the door body 2 closes slowly, reducing the closing speed of the door body 2, reducing the possibility of the refrigerator shaking or the door body 2 being damaged due to the excessive closing speed of the door body 2, and can also reduce the possibility of pinching the hand due to the excessive closing speed of the door body 2.

[0146] In some possible implementations of the embodiments of the present application, the distance between the second edge 338 and the axis of the first pivot axis 301 gradually decreases from one end away from the fourth pivot axis 304 to one end close to the fourth pivot axis 304, that is, the distance between the second edge 338 and the axis of the first pivot axis 301 gradually increases from one end away from the curved segment 336 to one end close to the curved segment 336.

[0147] During the closing process of the door body 2, the spring sheet 34 first presses against the end of the second edge 338 away from the fourth pivot axis 304, and as the door body 2 gradually closes, the spring sheet 34 gradually presses against the end of the second edge 338 close to the fourth pivot axis 304. Since the distance between the second edge 338 and the axis of the first pivot axis 301 gradually decreases from the end away from the fourth pivot axis 304 to the end close to the fourth pivot axis 304, as the door body 2 gradually closes, the compression amount of the spring sheet 34 by the second edge 338 gradually decreases, reducing the damping effect and door closing assistance of the spring sheet 34 on the hinge 3 when the door body 2 is in the closed state, thereby reducing the door opening force required to open the closed door body 2, making it easier to open the door body 2.

[0148] In some possible implementations of the embodiments of the present application, when the opening angle of the door body 2 is within a third set angle, the second edge 338 presses against the spring sheet 34 , so that the spring sheet 34 provides assistance to the closing of the door body 2 .

[0149] The third setting angle is less than or equal to the first setting temperature.

[0150] In some possible implementations of the present application, reference is made to Figure 5 and Figure 6 The third setting angle can be greater than 0° and less than or equal to 30°, so that after the door body 2 is released from the external force at a smaller opening angle within 30°, the spring piece 34 can provide assistance for the closing of the door body 2.

[0151] In some possible implementations of the present application, reference is made to Figure 5 and Fig.11 The second edge 338 may include a second curved surface 3381. The elastic force F of the spring sheet 34 on the second curved surface 3381 has a force arm that allows the second end of the second connecting rod 332 to rotate around the first pivot axis 301 toward the front wall of the box body 1, so that the spring sheet 34 has a certain closing force on the door body 2.

[0152] The second curved surface 3381 may protrude toward the spring sheet 34. Compared with the implementation mode in which the second curved surface 3381 is recessed in the direction away from the spring sheet 34, the second curved surface 3381 protrudes toward the spring sheet 34, so as to facilitate the spring sheet 34 and different positions on the second curved surface 3381 to achieve a press fit, improve the contact rate of each position of the spring sheet 34 and the second curved surface 3381, reduce the possibility that the spring sheet 34 and part of the second curved surface 3381 cannot achieve a press fit, and improve the stability of the press fit between the second curved surface 3381 and the spring sheet 34.

[0153] In some possible implementations of the embodiments of the present application, the second curved surface 3381 can be an arc surface, so that the distance between the second curved surface 3381 and the axis of the first pivot shaft 301 increases smoothly from the end of the second curved surface 3381 away from the front wall of the box body 1 to the end close to the front wall of the box body 1, thereby reducing the variation range of the damping effect of the spring 34 on the hinge 3 during the rotation of the door body 2, and making the door body 2 smoother when opening or closing.

[0154] In some possible implementations of the present application, the second edge 338 may include a second plane 3382. The elastic force F of the spring 34 on the second plane 3382 has a force arm that allows the second end of the second connecting rod 332 to rotate around the first pivot axis 301 toward the front wall of the box body 1, so that the spring 34 has a certain closing force on the door body 2.

[0155] The second plane 3382 may be connected to the second curved surface 3381 .

[0156] In some possible implementations of the embodiment of the present application, the second edge 338 may be adjacent to the curved segment 336 , that is, the third setting angle may be equal to the first setting angle, so as to improve the continuity of the damping effect of the spring sheet 34 on the hinge 3 .

[0157] The second curved surface 3381 of the second edge 338 is connected to the curved segment 336 .

[0158] In some possible implementations of the present application, reference is made to Figure 5 and Fig.10 As shown, the elastic sheet 34 includes a matching protrusion 343. The matching protrusion 343 protrudes toward the pressing portion 335. The side of the matching protrusion 343 facing the fourth connecting rod 334 can form a recess away from the fourth connecting rod 334.

[0159] The matching protrusion 343 can be formed by bending the elastic sheet 34. The matching protrusion 343 is used to press and match with the pressing portion 335 during the rotation of the door body 2.

[0160] In some possible implementations of the embodiments of the present application, when the door body 2 is gradually opened from a closed state, the mating protrusion 343 is pressed and mated with the second edge 338 , the curved segment 336 , and the first edge 337 in sequence.

[0161] During the gradual closing process of the door body 2 , the mating protrusion 343 of the elastic sheet 34 is pressed and mated with the first edge 337 , the curved section 336 and the second edge 338 in sequence.

[0162] During the process of the mating protrusion 343 of the spring piece 34 pressing and fitting with the second edge 338, the curved section 336 and the first edge 337, a certain damping effect can be achieved on the movement of the hinge 3 to buffer part of the door opening force or door closing force and reduce the rotation angle of the door body 2 after the external force is released.

[0163] When the mating protrusion 343 of the spring sheet 34 is pressed and engaged with the second edge 338, the mating protrusion 343 of the spring sheet 34 has a force arm that enables the second connecting rod 332 to rotate around the first pivot axis 301 toward the front wall of the box body 1, thereby providing a certain amount of assistance for closing the door body 2, reducing the external force required in the process of closing the door body 2, and making the process of closing the door body 2 more labor-saving.

[0164] When the mating protrusion 343 of the spring sheet 34 is pressed and mated with the first edge 337, the mating protrusion 343 of the spring sheet 34 has a force arm that enables the second connecting rod 332 to rotate around the first pivot axis 301 away from the front wall of the box body 1, thereby providing a certain amount of assistance for opening the door body 2, reducing the external force required in the process of opening the door body 2, and making the process of opening the door body 2 more labor-saving.

[0165] In some possible implementations of the embodiments of the present application, while the length between the first end 341 and the second end 342 of the spring clip 34 remains unchanged, a matching protrusion 343 is constructed on the spring clip 34, which can increase the unfolded length of the spring clip 34, thereby increasing the deformation of the spring clip 34, and further increasing the elastic force of the matching protrusion 343 on the pressing portion 335, thereby improving the damping effect of the spring clip 34 on the door body 2, the door closing assistance, and the door opening assistance.

[0166] In some possible implementations of the present application, reference is made to Figure 5 and Fig.10The spring piece 34 also includes a body section 344 connected to the matching protrusion 343. The matching protrusion 343 protrudes toward the pressing portion 335 relative to the body section 344. The side of the matching protrusion 343 facing the pressing portion 335 is a curved surface, which makes it easier for the matching protrusion 343 to deform when pressed by the pressing portion 335, thereby increasing the elastic force of the matching protrusion 343 on the pressing portion 335, and improving the damping effect of the spring piece 34 on the door body 2, the door closing assistance, and the door opening assistance.

[0167] In some possible implementations of the embodiments of the present application, if the thickness of the spring piece 34 is less than 1.5 mm, since the carbon content of spring steel is usually higher than that of ordinary steel, usually between 0.6% and 1.2%, the material properties are relatively brittle. For example, when the door is closed, the spring piece 34 is prone to fatigue fracture.

[0168] In some possible implementations of the embodiment of the present application, the thickness of the spring piece 34 is greater than or equal to 1.5 mm, so that the service life of the spring piece 34 can be extended.

[0169] In some possible implementations of the embodiments of the present application, if the thickness of the spring piece 34 is greater than 2.5 mm, the strength of the spring piece 34 is too high, resulting in difficulty in opening or closing the door when the spring piece 34 and the pressing portion 335 are pressed together, making the hinge 3 inconvenient to use.

[0170] In some possible implementations of the embodiments of the present application, the thickness of the spring piece 34 is greater than or equal to 1.5 mm and less than or equal to 2.5 mm, which can not only extend the service life of the spring piece 34, but also make the hinge 3 more labor-saving when used.

[0171] In some possible implementations of the embodiments of the present application, if the ratio of the thickness of the spring piece 34 to the unfolded length of the spring piece 34 is less than or equal to 0.03, the spring piece 34 is easy to produce.

[0172] In some possible implementations of the embodiments of the present application, when the ratio of the thickness of the spring clip 34 to the unfolded length of the spring clip 34 is greater than or equal to 0.01 and less than or equal to 0.03, for example, when the thickness of the spring clip 34 is 2 mm, the unfolded length of the spring clip 34 is 50 mm, 100 mm or 150 mm. This not only facilitates the production and manufacturing of the spring clip 34, but also helps to extend the service life of the spring clip 34.

[0173] The material of the spring piece 34 contains manganese. If the ratio of the thickness of the spring piece 34 to the unfolded length of the spring piece 34 is too large or too small, it will be affected by its own elasticity, making it difficult to bend and form, and the dimensional deviation after forming will be large.

[0174] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0175] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: include: Box; A door body, which is arranged on the door side of the box body; and a hinge, through which the door body is rotatably connected to the box body; The hinge comprises: A fixing seat connected to the box; A hinge arm connected to the door body; A transmission assembly comprises a first link, a second link, a third link and a fourth link, wherein the first end of the first link and the first end of the second link are both pivotally connected to the fixed seat, the first end of the second link is farther away from the front wall of the box body than the first end of the first link, the first end of the third link and the first end of the fourth link are both pivotally connected to the hinge arm, the first end of the third link is closer to the side wall of the box body close to the fixed seat than the first end of the fourth link, the second end of the first link is pivotally connected to the second end of the fourth link, the second end of the third link is pivotally connected to the first link, the second end of the second link is pivotally connected to the third link via a first pivot shaft, the circumferential side wall of the second end of the second link is configured with a pressing portion, the pressing portion comprises a first edge, and the distance between the first edge and the axis of the first pivot shaft gradually decreases from an end away from the first end of the second link to an end close to the first end of the second link; A spring sheet, both ends of which are connected to the two ends of the third connecting rod. During the closing process of the door body, the spring sheet presses against the first edge within at least a partial angle range to generate elastic deformation to assist the opening of the hinge. The elastic force of the spring sheet on the first edge has two mutually perpendicular components, one of which is directed through the axis of the first pivot shaft, and the other is directed away from the front wall of the box body.

2. The refrigerator according to claim 1, characterized in that: The pressing portion also includes a curved segment, the first edge is closer to the front wall of the box body than the curved segment, the curved segment rotates around the axis of the first pivot axis during the rotation of the door body, and the spring sheet presses against the curved segment within at least a partial angle range during the rotation of the door body to generate elastic deformation, and the direction of the elastic force of the spring sheet on the curved segment points to the first pivot axis.

3. The refrigerator according to claim 2, characterized in that: The pressing portion further includes a second edge, the second edge is further away from the front wall of the box body than the curved segment, and the distance between the second edge and the axis of the first pivot axis gradually increases from an end away from the curved segment to an end close to the curved segment; The spring sheet presses against the second edge within at least a partial angle range during the closing process of the door body, thereby generating elastic deformation to assist the closing of the hinge. The elastic force of the spring sheet on the second edge has two mutually perpendicular components, one of which is directed through the axis of the first pivot shaft, and the other is directed toward the first connecting rod.

4. The refrigerator according to claim 3, characterized in that: The first edge is adjacent to the curved segment, and the curved segment is adjacent to the second edge.

5. The refrigerator according to claim 4, characterized in that: The first edge includes a first curved surface and a first plane connected to each other, and the first curved surface is connected to the curved segment; the second edge includes a second curved surface and a second plane connected to each other, and the second curved surface is connected to the curved segment; The first curved surface and the second curved surface are both arc surfaces.

6. The refrigerator according to any one of claims 1 to 5, characterized in that: The spring sheet comprises a matching convex portion, the matching convex portion protrudes toward the pressing portion, and the matching convex portion and the pressing portion are pressed and matched with each other.

7. The refrigerator according to claim 6, characterized in that: A side of the matching protrusion facing the pressing portion is a curved surface.

8. The refrigerator according to any one of claims 1 to 5, characterized in that: The first end of the elastic sheet is arranged around the pivot axis between the third connecting rod and the first connecting rod, and the second end of the elastic sheet is arranged around the pivot axis between the third connecting rod and the hinge arm.

9. The refrigerator according to any one of claims 1 to 5, characterized in that: The thickness of the spring sheet is between 1.5 mm and 2.5 mm, and the ratio of the thickness of the spring sheet to the unfolded length of the spring sheet is between 0.01 and 0.

03.

10. A refrigerator, characterized in that: Including box body, door body and hinge; The hinge comprises: A fixing seat connected to the box; A hinge arm connected to the door body; A transmission assembly, comprising a first link, a second link, a third link and a fourth link, wherein the first end of the first link and the first end of the second link are both pivotally connected to the fixing seat, the first end of the second link is farther away from the front wall of the box body than the first end of the first link, the first end of the third link and the first end of the fourth link are both pivotally connected to the hinge arm, the first end of the third link is closer to the side wall of the box body close to the fixing seat than the first end of the fourth link, the second end of the first link is pivotally connected to the second end of the fourth link, the second end of the third link is pivotally connected to the first link, the second end of the second link is pivotally connected to the third link via a first pivot shaft, and the circumferential side wall of the second end of the second link is configured with a first edge; The two ends of the spring sheet are connected to the two ends of the third connecting rod. The spring sheet presses against the first edge within at least a partial angle range during the closing process of the door body to generate elastic deformation to provide assistance for opening the hinge.

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