Refrigerator

Abstract

A refrigerator, relating to the technical field of refrigeration, and aiming at solving the technical problem in the related art that a gap is prone to occurring between a door body (200) and a refrigerator body (100), causing poor sealing performance of an accommodating cavity. The refrigerator comprises a refrigerator body (100), a door body (200), and a gravity self-closing structure. The gravity self-closing structure comprises a fixed member (300) and a movable member (400) cooperating with each other. The movable member (400) is provided with a path groove (420). The fixed member (300) is provided with a first hinge shaft (310) and a second hinge shaft (320). The fixed member (300) is provided with a first inclined portion (330) and a second inclined portion (340). A first end of the first inclined portion (330) is connected to the fixed member (300); and a second end of the first inclined portion (330) is inclined upward. A first end of the second inclined portion (340) is connected to the second end of the first inclined portion (330); and a second end of the second inclined portion (340) is inclined downward. The movable member (400) is provided with an abutting portion (410). During rotational closing of the door body (200), the abutting portion (410) sequentially abuts against the first inclined portion (330) and the second inclined portion (340), and the door body (200) moves upward first and then moves downward in a vertical direction. The refrigerator can reduce the situation that a gap is prone to occurring between the door body (200) and the refrigerator body (100), thereby improving the sealing performance of the accommodating cavity.

Description

refrigerator

[0001] This application claims priority to Chinese patent application No. 202410669533.2, filed on May 28, 2024; and to Chinese patent application No. 202421188396.2, filed on May 28, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of refrigeration technology, and more particularly to a refrigerator. Background Technology

[0003] A refrigerator is a common household appliance that keeps food or other items at a constant low temperature. A refrigerator consists of a cabinet and a door. The cabinet forms a cavity for holding food or other items, and the door is movable within the cabinet to close or open the cavity. However, when the door is closed to seal the cavity, gaps can easily appear between the door and the cabinet, resulting in poor sealing of the cavity.

[0004] Summary of the Invention

[0005] This application provides a refrigerator that solves the technical problem that when the door is closed to seal the cavity, gaps easily appear between the door and the cabinet, resulting in poor sealing of the cavity.

[0006] In a first aspect, embodiments of this application provide a refrigerator, comprising:

[0007] Box;

[0008] The door is rotatably mounted on the housing;

[0009] The gravity-operated self-closing structure includes a fixing component and a movable component that cooperate with each other. The fixing component is disposed in the housing, and the movable component is fixedly disposed in the door.

[0010] The movable component is provided with a track groove; the fixed component is provided with a hinge shaft, which can move in the track groove;

[0011] The surface of the fixing member facing the movable member is further provided with a first inclined portion and a second inclined portion. The first end of the first inclined portion is connected to the fixing member, the first inclined portion is inclined upward, the first end of the first inclined portion is the bottom end of the first inclined portion, and the first end of the first inclined portion is the top end of the first inclined portion. The first end of the second inclined portion is connected to the second end of the first inclined portion, the second inclined portion is inclined downward, the first end of the second inclined portion is the top end of the second inclined portion, and the second end of the second inclined portion is the bottom end of the second inclined portion.

[0012] The movable part is provided with an abutting part, which is used to abut against the first inclined part and the second inclined part;

[0013] During the process of the door rotating and closing, the abutting part abuts against the first inclined part and the second inclined part in sequence; the hinge shaft moves from the second end of the track groove toward the first end of the track groove.

[0014] Secondly, embodiments of this application provide a refrigerator, including a cabinet, a door, and a gravity-operated self-closing structure. The door is used to close or open the receiving cavity of the cabinet. The gravity-operated self-closing structure is disposed at the lower end of the door. The gravity-operated self-closing structure includes a fixed member and a movable member; the fixed member is disposed in the cabinet, and the movable member is disposed in the door. The movable member is provided with a track groove; the fixed member is provided with a first hinge shaft and a second hinge shaft that can move within the track groove. The fixed member has a first inclined portion and a second inclined portion on its surface facing the movable member. The first end of the first inclined portion is connected to the fixed member, and the first inclined portion is inclined upward. The first end of the first inclined portion is the bottom end of the first inclined portion, and the first end of the first inclined portion is the top end of the first inclined portion. The first end of the second inclined portion is connected to the second end of the first inclined portion, and the second inclined portion is inclined downward. The first end of the second inclined portion is the top end of the second inclined portion, and the second end of the second inclined portion is the bottom end of the second inclined portion. The movable member is provided with an abutment portion for abutting against the first and second inclined portions. During the process of the door rotating and closing, the first hinge shaft and the second hinge shaft move in the track groove along the extension direction of the track groove, and the abutting part moves from the fixing member through the first inclined part to the second inclined part.

[0015] Thirdly, embodiments of this application provide a refrigerator, including a cabinet, a door, and a gravity-operated self-closing structure. The door is rotatably mounted on the cabinet. The gravity-operated self-closing structure includes a cooperating fixed member and a movable member. The fixed member is mounted on the cabinet, and the movable member is fixedly mounted on the door. The movable member has a track groove. The fixed member has a hinge shaft that can move within the track groove. The surface of the fixed member facing the movable member also has a protruding structure, which has an uphill section and a downhill section. The movable member has an abutment portion for abutting the uphill section and the downhill section. During the rotational closing process of the door, the abutment portion abuts the uphill section and the downhill section in sequence.

[0016] In the refrigerator of this embodiment, by adopting the above-described technical solution, during the door rotation closing process, the hinge shaft can move from the second end of the track groove toward the first end of the track groove, and the abutment part sequentially abuts against the first inclined part and the second inclined part. Since the door has a certain weight, during the door rotation opening process, it is necessary to overcome the weight of the door so that the door can drive the abutment part to move from the second end of the second inclined part to the first end of the second inclined part. Thus, the second inclined part provides a certain limiting effect on the abutment part, reducing the possibility of movement of the abutment part.

[0017] Furthermore, during the rotation and closing of the door, when the abutting part abuts against the second inclined part, the abutting part can move towards the second end of the second inclined part under the weight of the door, making it easier for the door to move from the inclined part to the second contact part. When the abutting part is facing the second inclined part, when the door is closed to seal the receiving cavity, the possibility of gaps between the door and the housing can be reduced, improving the sealing performance of the receiving cavity. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of a refrigerator according to an embodiment of this application;

[0019] Figure 2 is an exploded view of the gravity self-closing structure according to an embodiment of this application;

[0020] Figure 3 is a schematic diagram showing the relative positions of the first inclined surface, the second inclined surface, and the track groove of the abutment portion on the movable part according to an embodiment of this application;

[0021] Figure 4 is a schematic diagram of the hinge plate located at the upper end of the door in an embodiment of this application;

[0022] Figure 5 is a schematic diagram of the abutting portion of the present application located on the side of the first inclined portion away from the second inclined portion;

[0023] Figure 6 is a schematic diagram of the gravity self-closing structure from another perspective in Figure 5 of this application embodiment;

[0024] Figure 7 is a schematic diagram of the abutting portion located in the first inclined portion according to an embodiment of this application;

[0025] Figure 8 is a schematic diagram of the gravity self-closing structure from another perspective in Figure 7 of this application embodiment;

[0026] Figure 9 is a schematic diagram of the abutting portion located at the second end of the first inclined portion according to an embodiment of this application;

[0027] Figure 10 is a schematic diagram of the gravity self-closing structure from another perspective in Figure 9 of this application embodiment;

[0028] Figure 11 is a schematic diagram of the first hinge shaft located at the second end of the track groove according to an embodiment of this application;

[0029] Figure 12 is a schematic diagram of the first hinge axis located at the first inflection point according to an embodiment of this application;

[0030] Figure 13 is a schematic diagram of the first hinge shaft located in the first groove segment according to an embodiment of this application;

[0031] Figure 14 is a schematic diagram of the second hinge shaft located at the first end of the track groove according to an embodiment of this application;

[0032] Figure 15 is a schematic diagram of the first hinge shaft being located in the first groove segment when the abutting part abuts against the first end of the first inclined part according to an embodiment of this application.

[0033] Figure 16 is a schematic diagram of the first hinge shaft and the second hinge shaft located in the first groove segment according to an embodiment of this application;

[0034] Figure 17 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part abuts against the first end of the first inclined part according to an embodiment of this application.

[0035] Figure 18 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part abuts against the second end of the first inclined part according to an embodiment of this application.

[0036] Figure 19 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part abuts against the second end of the second inclined part according to an embodiment of this application.

[0037] Figure 20 is a schematic diagram of a door body with an end cap and a bushing provided at the upper end in one embodiment of this application;

[0038] Figure 21 is a schematic diagram of the hinge shaft located at the second end of the track groove according to an embodiment of this application;

[0039] Figure 22 is a schematic diagram of the hinge axis located at the first inflection point according to an embodiment of this application;

[0040] Figure 23 is a schematic diagram of the hinge shaft located in the first groove segment according to an embodiment of this application;

[0041] Figure 24 is a schematic diagram of the hinge shaft located at the first end of the track groove according to an embodiment of this application;

[0042] Figure 25 is a structural schematic diagram of a movable component with a columnar abutment portion according to an embodiment of this application;

[0043] Figure 26 is a schematic diagram of the structure of the movable component with a roller-type abutment portion according to an embodiment of this application;

[0044] Figure 27 is a schematic diagram of the connection structure between the fastener and the hinge plate in an embodiment of this application;

[0045] Figure 28 is a schematic diagram of the structure of the adjustment plate according to an embodiment of this application;

[0046] Figure 29 is a structural schematic diagram of the adjustment plate and connector according to an embodiment of this application. Embodiments of the present invention

[0047] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0048] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0049] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0050] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application 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 application.

[0051] The terms "first," "second," etc., 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0053] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] In related technologies, refrigerators include a cabinet and a door. The cabinet has a cavity for storing food or other items, and the door is movably disposed on the cabinet to close or open the cavity. For example, the door can be rotatably disposed on the cabinet; when the door is against the cabinet, it closes the cavity; when an angle is formed between the door and the cabinet, it opens the cavity to allow food or other items to be retrieved or placed inside.

[0055] However, when the door is rotated to close the receiving cavity, the door moves toward the receiving cavity. When the door is in contact with the surface of the box, due to the influence of changes in air pressure inside the receiving cavity, the door is prone to popping off the surface of the box, resulting in a gap between the door and the surface of the box, thus affecting the sealing of the receiving cavity.

[0056] In view of this, the refrigerator of this application embodiment, by adopting the above technical solution, allows the hinge shaft to move from the second end of the track groove toward the first end of the track groove during the door rotation closing process, with the abutment portion sequentially abutting the first inclined portion and the second inclined portion. Since the door has a certain weight, during the door rotation opening process, it is necessary to overcome the weight of the door so that the door can drive the abutment portion to move from the second end of the second inclined portion to the first end of the second inclined portion. This allows the second inclined portion to provide a certain limiting effect on the abutment portion, reducing the possibility of movement of the abutment portion.

[0057] Furthermore, during the rotation and closing of the door, when the abutting part abuts against the second inclined part, the abutting part can move towards the second end of the second inclined part under the weight of the door, making it easier for the door to move from the inclined part to the second contact part. When the abutting part is facing the second inclined part, when the door is closed to seal the receiving cavity, the possibility of gaps between the door and the housing can be reduced, improving the sealing performance of the receiving cavity.

[0058] Referring to FIG1, an embodiment of this application provides a refrigerator, which includes a cabinet 100 having a receiving cavity, a door 200 connected to the cabinet 100 to open and close the receiving cavity, and a refrigeration device for supplying cold air to the receiving cavity.

[0059] The cabinet 100 includes an inner liner defining a receiving cavity, an outer shell connected to the outside of the inner liner to form the appearance of a refrigerator, and a heat insulation layer disposed between the inner liner and the outer shell to insulate the receiving cavity.

[0060] The cabinet 100 may define multiple accommodating cavities. In this embodiment, the multiple accommodating cavities may include a refrigerator compartment and a freezer compartment located below the refrigerator compartment. It should be noted that the types and arrangements of the multiple accommodating cavities of the refrigerator are not limited to this.

[0061] The front end of the receiving cavity has a loading and unloading port, through which the user can place food into or remove food from the receiving cavity. The housing 100 is provided with a rotatable door 200 to open or close the loading and unloading port of the receiving cavity.

[0062] For example, the door 200 can be rotatably connected to the housing 100 by a hinge assembly located at the upper part of the door 200 and a hinge assembly located at the lower part of the door 200.

[0063] The door 200 may have a rear wall 202 that is close to the housing 100 when the door 200 is closed, a front wall 201 that is away from the housing 100 when the door 200 is closed, and a side wall 203 connected to the rear wall 202. The front wall 201 and the rear wall 203 are arranged opposite to each other, and the front wall 201 and the side wall 203 are connected to form a front edge, while the rear wall 202 and the side wall 203 are connected to form a rear edge. The rear edge and the front edge are arranged parallel to each other.

[0064] In some embodiments, the hinge assembly may be located near the door sidewall 203 so that the door 200 can rotate relative to the housing 100 via the hinge assembly to close or open the receiving cavity via the door 200.

[0065] For example, when the hinge assembly is located on the right side of the housing 100, the right side wall of the door 200 can be configured as a door side wall 203. When the hinge assembly is located on the left side of the housing 100, the left side wall of the door 200 can be configured as a door side wall 203.

[0066] A door seal can be provided on the rear wall 202 of the door 200. When the door 200 is closed, the door seal surrounds the access opening and fits against the front face of the cabinet 100 to effectively seal the connection between the door 200 and the cabinet 100, thereby ensuring that the door 200 seals the access opening and preventing cold air from escaping. For example, the door seal can be in the shape of a ring.

[0067] For example, hinge assemblies may be provided at both the upper and lower ends of the door body 200. For the hinge assembly located at the upper end of the door body 200, the hinge assembly may include a hinge plate 350 connected to the upper end of the housing 100, at least one hinge axle, and a defining axis connected to the hinge plate 350 to form a guide axis for moving the door body 200. The hinge plate 350 and the hinge axle may be integrally formed, or they may be provided separately and assembled together.

[0068] In some embodiments, the hinge plate 350 may be disposed at the lower end of the housing 100. The side of the hinge plate 350 facing the door 200 is provided with at least one hinge axis to guide the door 200 to move. The hinge plate 350 and the hinge axis may be integrally formed, or they may be provided separately and assembled together.

[0069] The number of hinge axes can be set to one. Alternatively, the number of hinge axes can also be set to at least two. For example, as shown in Figure 2, the number of hinge axes can be set to two, with the two hinge axes being the first hinge axis 310 and the second hinge axis 320, respectively.

[0070] In some embodiments, as shown in FIG4, for a hinge assembly located at the upper end of the door body 200, the hinge assembly may include a guide member connected to the upper end of the door body 200. The guide member may be provided with a track groove 420. The track groove 420 may accommodate the hinge shaft 301, thereby enabling the door body 200 to open or close through the sliding process of the hinge shaft 301 within the track groove 420.

[0071] In some embodiments, the refrigerator may further include a gravity-operated self-closing structure. The gravity-operated self-closing structure may be disposed at the lower end of the door 200, and may include a cooperating fixing member 300 and a moving member 400.

[0072] The fixed member 300 can be fixedly installed on the housing 100, and the movable member 400 can be fixedly installed on the door 200. Alternatively, a hinge plate 350 is provided at the bottom of the housing 100, and the fixed member 300 is installed on the hinge plate 350. The movable member 400 and the fixed member 300 can be arranged vertically. The hinge assembly located at the lower end of the door 200 can be reused to form at least one of the fixed member 300 and the movable member 400, so as to facilitate the formation process of the gravity self-closing structure.

[0073] Alternatively, the fastener 300 can be fixedly installed on the door 200, and the movable part 400 can be fixedly installed on the box 100.

[0074] When the door 200 is rotated to the closed state, the door 200 can move toward the box 100 through the gravity self-closing structure. The door 200 can move vertically relative to the fixed part 300 under the drive of the movable part 400, so that the door 200 can abut against the box 100.

[0075] When the door 200 needs to be rotated to open, the weight of the door 200 needs to be overcome to separate the door 200 from the housing 100, thereby reducing the gap between the door 200 and the housing 100 when the door 200 is in the closed state and improving the sealing of the receiving cavity.

[0076] For example, the refrigerator can be configured as a side-by-side refrigerator, with two doors 200 to seal multiple cavities. Compared to other types of refrigerators such as cross-door refrigerators, the doors 200 of the side-by-side refrigerator are taller and heavier, resulting in better gravity self-closing effect of the doors 200 through the gravity self-closing structure, and increasing the gravity that needs to be overcome when rotating to open the doors 200.

[0077] It should be noted that a suction aid or similar structure can be installed between the door 200 and the cabinet 100 to reduce the gap between them. However, compared to other types of refrigerators such as French door refrigerators, the door 200 of a side-by-side refrigerator is heavier. Side-by-side refrigerators typically cannot achieve a tight seal between the door 200 and the cabinet 100 using only a suction aid. This makes gravity-based self-closing structures more suitable for refrigerators with heavy door 200s, such as side-by-side refrigerators, or other types of refrigerators where the door 200 can support a significant weight, to further improve the sealing effect of the door 200 on the cavity.

[0078] In some embodiments, the height of the door 200 can be set to be greater than or equal to 1700 mm and less than or equal to 2000 mm. For example, the height of the door 200 can be set within any of the following height ranges: 1700 mm-1750 mm, 1750 mm-1800 mm, 1800 mm-1850 mm, 1850 mm-1900 mm, 1900 mm-1950 mm, and 1950 mm-2000 mm.

[0079] The height of the door 200 will affect the gravity of the door 200. For example, when the material and thickness of the door 200 are kept constant, the higher the door 200 is, the greater its weight, and the better the gravity self-closing effect of the door 200 through the gravity self-closing structure.

[0080] Furthermore, when the distance the door 200 moves vertically during the process of rotating to close or open remains constant, the higher the door 200 is, the lower the ratio of the distance the door 200 moves vertically to the height of the door 200, and the less jerky the user feels during the process of rotating to close or open the door 200.

[0081] Each of the aforementioned height ranges may include at least one of the two endpoint values. For example, when the height of the door 200 is set within the range of 1700 mm to 1750 mm, the height of the door 200 may be greater than or equal to 1700 mm and less than or equal to 1750 mm. Alternatively, the height of the door 200 may also be greater than 1700 mm and less than or equal to 1750 mm. Or, the height of the door 200 may be greater than or equal to 1700 mm and less than 1750 mm.

[0082] Alternatively, any of the above height ranges may not include the two endpoint values. For example, when the height of the door 200 is set within the range of 1700 mm to 1750 mm, the height of the door 200 may also be set to be greater than 1700 mm and less than 1750 mm.

[0083] It should be noted that the various numerical ranges appearing in the embodiments of this application, such as the thickness range or weight range that appear later, can all refer to the height range. That is, the numerical range can include at least one of the two endpoint values, or the numerical range may not include the two endpoint values. This will not be elaborated further in the embodiments of this application.

[0084] In some embodiments, the thickness of the door body 200 can be set to be greater than or equal to 45 mm and less than or equal to 65 mm. For example, the thickness of the door body 200 can be set within any height range of 45 mm-48 mm, 48 mm-50 mm, 50 mm-52 mm, 52 mm-55 mm, 55 mm-58 mm, 58 mm-60 mm, 60 mm-62 mm, and 62 mm-65 mm.

[0085] The thickness of the door 200 will affect the gravity of the door 200. For example, when the material and height of the door 200 are kept the same, the thicker the door 200, the greater the weight of the door 200, and the better the gravity self-closing effect of the door 200 through the gravity self-closing structure.

[0086] The weight of the door body 200 can be set to less than or equal to 10 kg. For example, the weight of the door body 200 can be set to any of the following weight ranges: 5 kg-6 kg, 6 kg-7 kg, 7 kg-8 kg, 8 kg-9 kg, and 9 kg-10 kg.

[0087] During the use of the refrigerator, the door 200 can be used to support items of a certain weight, thereby increasing the total weight of the door 200 and improving the gravity self-closing effect of the door 200.

[0088] Alternatively, the weight of the door 200 can be set to be greater than or equal to 10 kg and less than or equal to 30 kg. For example, the weight of the door 200 can be set within any weight range of 10 kg-15 kg, 15 kg-20 kg, 20 kg-25 kg, and 25 kg-30 kg, so that the connection between the door 200 and the housing 100 can be made tighter by the gravity of the door 200.

[0089] In some embodiments, the refrigerator can be installed inside a cabinet. In an embedded refrigerator where the front wall 201 of the door 200 is flush with the front end of the cabinet wall when the door 200 is closed, interference occurs between the front wall 201 and the cabinet wall after the door 200 is opened to the point where the front wall 201 and the cabinet wall are on the same plane (the door 200 is opened approximately 90°), preventing the door 200 from being opened further. That is, the maximum opening angle of the door 200 is 90°, which affects the user's ability to access items inside the refrigeration unit.

[0090] For example, during the rotation and opening of the door 200, the movement trajectory of the door 200 can be controlled in the following stages: as the door 200 continues to open from the preset opening angle to the maximum opening angle, the door 200 is moved from the opening side to the pivoting side. This can avoid interference between the door 200 and the cabinet wall when the door 200 is further opened, thereby increasing the opening angle of the door 200 (e.g., greater than 120°), making it easier for users to store and retrieve items.

[0091] In some embodiments, the hinge assembly may be configured such that, before the door 200 is rotated open to a preset opening angle, the door 200 moves first to the opening side and then to the pivoting side while rotating open.

[0092] During the rotation and opening of the door 200, the door 200 first moves towards the opening side, gradually moving away from the cabinet wall located on the pivot side. This increases the distance between the end of the door 200 on the pivot side and the cabinet wall on the pivot side, thus avoiding interference with the cabinet wall. On one hand, even if the built-in refrigerator is seamlessly integrated into the cabinet, interference between the door 200 and the cabinet wall can be avoided during the opening process. On the other hand, it provides more space for the door 200 to move towards the pivot side further during subsequent opening, preventing interference between the door 200 and the cabinet wall during the opening process.

[0093] After the door 200 moves to the opening side, it moves to the pivot side to further open the door 200, allowing a larger area of ​​the storage space inside the cabinet 100 to be exposed to the user, making it easier for the user to access items.

[0094] It should be noted that the pivot side mentioned above refers to the side of the built-in refrigerator corresponding to the rotating end of the door 200. In other words, the pivot side refers to the side of the cabinet 100 where the door 200 is installed. The opening side mentioned above refers to the side of the built-in refrigerator corresponding to the free end of the door 200. In other words, the opening side refers to the other side of the cabinet 100 opposite to the pivot side where the door 200 is not installed. For example, if the door 200 is installed on the right side of the opening of the cabinet 100, then the pivot side refers to the right side, and the opening side corresponds to the left side of the opening of the cabinet 100.

[0095] In some embodiments, the number of hinge shafts 301 is set to one. As shown in FIG24, when the door 200 is in the closed state, the hinge shaft 301 can be located at the first end of the track groove 420. As shown in FIG21, when the door 200 is in the open state, the hinge shaft 301 can be located at the second end of the track groove 420. As shown in FIG23 and FIG22, during the process of the door 200 rotating open, the hinge shaft 301 can move from the first end of the track groove 420 toward the second end of the track groove 420, thereby realizing the rotation of the door 200.

[0096] For example, the track groove 420 may include a groove wall and an arc-shaped groove bottom that is smoothly connected to the groove wall.

[0097] The end of the hinge shaft 301 that mates with the bottom of the arc-shaped groove can have an arc-shaped end face, the shape of which matches the shape of the bottom of the arc-shaped groove. This enhances the smoothness of the opening and closing of the door body 200, making the fit between the hinge shaft 301 and the track groove 420 tighter and smoother. Of course, this is not a limitation; the hinge shaft 301 can also be directly set as a column, in which case the groove wall and bottom of the track groove 420 are set as a plate that mates with the hinge shaft 301.

[0098] In some embodiments, the shaft portion of the hinge shaft 301 that mates with the track groove 420 is cylindrical. The shaft diameter is the same as the groove width of the track groove 420 to enhance the stability of the hinge mechanism's movement. Of course, this is not a limitation. The shaft portion can also be stepped, as long as the fit between the shaft portion and the track groove 420 allows the door body 200 to move along a preset motion trajectory.

[0099] Specifically, the track groove 420 can extend along the arrangement direction of the pivot side and the opening side. During the rotation and opening of the door 200, the hinge shaft 301 can first move along the track groove 420 towards the end of the track groove 420 closer to the opening side, then move along the track groove 420 towards the end of the track groove 420 closer to the pivot side, and then move along the track groove 420 towards the end of the track groove 420 closer to the opening side. This causes the door 200 to move towards the opening side first, then towards the pivot side, and then towards the opening side again during the rotation and opening process.

[0100] Along the direction from the open side toward the pivot side, the track groove 420 may include a first groove segment 421, a second groove segment 422, and a third groove segment 423 connected in sequence. The end of the first groove segment 421 away from the second groove segment 422 is designated as the first end of the track groove 420, and the end of the third groove segment 423 away from the second groove segment 422 is designated as the second end of the track groove 420.

[0101] During the process of the door 200 rotating and opening, when the hinge shaft 301 is in the first groove 421 and moves towards the second groove 422, it guides the hinge shaft to move along the track groove 420 towards the opening side, so as to drive the door 200 to move towards the opening side first.

[0102] As shown in Figure 22, when the door 200 is rotated open to the junction of the first groove segment 421 and the second groove segment 422, and continues to rotate open, it moves within the second groove segment 422 and toward the third groove segment 423, guiding it to move along the track groove 420 toward the end of the track groove 420 closer to the pivot side, so as to drive the door 200 to move toward the pivot side.

[0103] When the door 200 is rotated open to the point where the hinge shaft 301 is located at the junction of the second groove segment 422 and the third groove segment 423, and continues to rotate open, the hinge shaft 301 moves within the third groove segment 423 and in a direction away from the second groove segment 422, guiding the hinge shaft 301 to move along the track groove 420 toward the end of the track groove 420 closer to the opening side, so as to drive the door 200 to move toward the opening side.

[0104] Of course, this is not a limitation. It is understood that in other embodiments, the specific structure of the trajectory groove 420 and the setting of its extension direction are only required to guide the hinge shaft 301 to move along a preset motion trajectory.

[0105] In some embodiments, the number of hinge axes 301 is set to two. The two hinge axes 301 are respectively set as a first hinge axis 310 and a second hinge axis 320. The first hinge axis 310 is located near the second end of the track groove 420 relative to the second hinge axis 320, and the second hinge axis 320 is located near the first end of the track groove 420 relative to the first hinge axis 310.

[0106] As shown in Figure 14, when the door 200 is in the closed state, the second hinge shaft 320 can be located at the first end of the track groove 420, and the first hinge shaft 310 and the second hinge shaft 320 are spaced apart. As shown in Figure 11, when the door 200 is in the open state, the first hinge shaft 310 can be located at the second end of the track groove 420.

[0107] During the rotation and opening of the door 200, as the first hinge shaft 310 and the second hinge shaft 320 move within the first groove 421 and toward the second groove 422, the hinge shaft is guided to move along the track groove 420 toward the opening side, thereby causing the door 200 to move toward the opening side first.

[0108] When the door 200 is rotated open to the point where the second hinge shaft 320 is located in the first groove segment 421 and the first hinge shaft 310 is located in the second groove segment 422, and continues to rotate open, the first hinge shaft 310 moves within the second groove segment 422 and toward the third groove segment 423, guiding the hinge shaft to move along the track groove 420 toward the end of the track groove 420 closer to the pivot side, thereby driving the door 200 to move toward the pivot side.

[0109] When the door 200 rotates open to the point where the second hinge shaft 320 is located in the second groove segment 422 and the first hinge shaft 310 is located in the third groove segment 423, and continues to rotate open, the first hinge shaft 310 moves in the third groove segment 423 and away from the second groove segment 422, guiding the hinge shaft to move along the track groove 420 toward the end of the track groove 420 closer to the opening side, so as to drive the door 200 to move toward the opening side.

[0110] It should be noted that, as shown in Figure 11, the trajectory slot 420 can be provided with a first inflection point P and a second inflection point Q set at intervals. The first inflection point P can be set between the first slot segment 421 and the second slot segment 422, and the second inflection point Q can be set between the second slot segment 422 and the third slot segment 423.

[0111] In a plane perpendicular to the rear wall 202 and the side wall 203 of the door, for example, in the upper top surface or lower bottom surface of the door body 200, a straight line parallel to the rear wall 202 can be used as the first reference line. The first reference line can be gradually moved from the rear wall 202 toward the front wall 201 of the door. The position where the first reference line is tangent to the track groove 420 can be set as the first inflection point P of the track groove 420.

[0112] In a plane perpendicular to the rear wall 202 and the side wall 203 of the door, for example, in the upper top surface or lower bottom surface of the door body 200, a straight line parallel to the side wall 203 can be used as a second reference line. The second reference line can be gradually moved from the side wall 203 toward the middle of the door body 200. The position where the second reference line is tangent to the track groove 420 can be set as the second inflection point Q of the track groove 420.

[0113] The curvature of the first groove segment 421 can be less than the curvature of the second groove segment 422, and the curvature of the second groove segment 422 can be greater than the curvature of the third groove segment 423. The first end of the track groove 420 is closer to the front wall 201 of the door relative to the first inflection point P, and the first end of the first groove segment 421 is farther from the side wall 203 of the door relative to the first inflection point P. The first inflection point P is closer to the rear wall 202 of the door relative to the second inflection point Q, and the first inflection point P is farther from the side wall 203 of the door relative to the second inflection point Q. The second inflection point Q is farther from the front wall 201 of the door relative to the second end of the track groove 420, and the second inflection point Q is closer to the side wall 203 of the door relative to the second end of the track groove 420.

[0114] In some embodiments, during the process of the door 200 rotating open or rotating closed, the moving directions of the first hinge axis 310 and the second hinge axis 320 can be determined according to the trajectory groove 420 at the corresponding position.

[0115] For example, when the first hinge axis 310 and the second hinge axis 320 move within the track groove 420, the first hinge axis 310 and the second hinge axis 320 will contact the inner wall of the track groove 420. The tangential direction of the track groove 420 that contacts the first hinge axis 310 can be set as the moving direction of the first hinge axis 310, and the tangential direction of the track groove 420 that contacts the second hinge axis 320 can be set as the moving direction of the second hinge axis 320.

[0116] When the hinge shaft moves within the first groove 421 and the second groove 422, the curvature of the first groove 421 is less than that of the second groove 422. The direction of movement of the hinge shaft changes less within the first groove 421 and more within the second groove 422.

[0117] When the hinge axis moves within the second groove 422 and the third groove 423, the curvature of the third groove 423 is less than that of the second groove 422. The change in the direction of movement of the hinge axis within the third groove 423 is smaller, while the change in the direction of movement of the hinge axis within the second groove 422 is larger.

[0118] For example, when the first hinge axis 310 and the second hinge axis 320 move within the first segment 421 of the track groove 420, the direction of movement of the first hinge axis 310 is relatively close to the direction of movement of the second hinge axis 320. When the first hinge axis 310 moves within the first segment 421 of the track groove 420 and the second hinge axis 320 moves within the second segment 422 of the track groove 420, the angle between the direction of movement of the first hinge axis 310 and the direction of movement of the second hinge axis 320 is relatively large.

[0119] During the process of the door 200 rotating and closing, the first hinge shaft 310 and the second hinge shaft 320 can move from the second end of the track groove 420 toward the first end of the track groove 420 within the track groove 420.

[0120] In some embodiments, as shown in FIG5, the surface of the fixing member 300 facing the movable member 400 is further provided with a first inclined portion 330 and a second inclined portion 340. The bottom of the movable member 400 is provided with an abutment portion 410. The abutment portion 410 is used to abut against the first inclined portion 330 and the second inclined portion 340.

[0121] The first inclined portion 330 and the second inclined portion 340 are located on the path of rotation of the door body 200. Within a preset angle range of rotation of the door body 200, the abutting portion 410 abuts against the first inclined portion 330 and the second inclined portion 340. For example, the preset angle can be a first set angle. When the door body 200 rotates beyond the preset angle range, the abutting portion 410 can move away from the first inclined portion 330 and the second inclined portion 340 and does not contact the first inclined portion 330 and the second inclined portion 340.

[0122] The degree of engagement between the abutment portion 410 and the first inclined portion 330 and the second inclined portion 340 is related to the opening angle of the door 200 relative to the box 100. For example, the contact between the abutment portion 410 and the first inclined portion 330 and the second inclined portion 340 at different positions corresponds to different opening angles φ.

[0123] In some embodiments, the opening angle φ of the door 200 may have a first preset angle, a second preset angle, and a third preset angle that decrease sequentially. As shown in Figures 7 and 8, when the opening angle of the door 200 is set to the first preset angle, the abutting portion 410 abuts against the first end of the first inclined portion 330. As shown in Figures 9 and 10, when the opening angle of the door 200 is set to the second preset angle, the abutting portion 410 abuts against the second end of the first inclined portion 330. As shown in Figure 6, when the opening angle of the door 200 is set to the third preset angle, the abutting portion 410 abuts against the second end of the second inclined portion 340.

[0124] During the process of the door 200 rotating to open or close, the user pulls or pushes the door 200 to rotate around the first hinge axis 310 and the second hinge axis 320. When the door 200 rotates to between the second set angle and the third set angle, the door 200 moves vertically relative to the fixed member 300 under the drive of the movable member 400.

[0125] During the process of the door 200 rotating and opening, the door 200 can rotate from the third set angle to the second set angle, the opening angle of the door 200 gradually increases, and the door 200 moves upward in the vertical direction under the action of the abutment part 410.

[0126] The smaller the angle of the third setting angle, the sooner the user will feel the door 200 rising during the opening process. The smaller the angle of the second setting angle, the sooner the user will feel the end of the door 200 rising process during the opening process. The smaller the difference between the second and third setting angles, the shorter the door 200 rising process will feel to the user during the opening process.

[0127] During the process of the door 200 rotating and closing, the door 200 can rotate from the second set angle to the third set angle, the opening angle of the door 200 gradually decreases, and the door 200 drives the abutment part 410 to move downward in the vertical direction.

[0128] The smaller the second set angle, the sooner the user will feel the door 200 descending during the closing process. The smaller the third set angle, the sooner the user will feel the door 200 descending process ending during the opening process. The smaller the difference between the second and third set angles, the shorter the door 200 descending process will feel for the user during the opening process.

[0129] During the process of the door 200 rotating and closing, the first hinge shaft 310 and the second hinge shaft 320 can move from the second end of the track groove 420 toward the first end of the track groove 420 within the track groove 420, and the first hinge shaft 310 and the second hinge shaft 320 can move from the third groove segment 423 toward the second groove segment 422 and the first groove segment 421.

[0130] When the opening angle φ of the door 200 is greater than the first set angle, as shown in Figure 5, the abutment portion 410 can be located on the side of the first end of the first inclined portion 330 away from the second end of the first inclined portion 330. The abutment portion 410 does not contact the first inclined portion 330. As shown in Figure 11, the first hinge shaft 310 can be located at the second end of the track groove 420, and the second hinge shaft 320 can be located within the third groove segment 423. Alternatively, the second hinge shaft 320 can be located within the second groove segment 422.

[0131] When the opening angle φ of the door 200 is equal to the first set angle, as shown in Figure 7, the abutment part 410 can be located at the first end of the first inclined part 330 and contact the first end of the first inclined part 330. As shown in Figure 13, the first hinge shaft 310 can be located in the first groove section 421, and the second hinge shaft 320 can be located in the first groove section 421.

[0132] During the process of the door 200 rotating and closing, when the opening angle φ of the door 200 is less than the first set angle, the abutment part 410 moves upward from the first end of the first inclined part 330 to the second end of the first inclined part 330, and the abutment part 410 moves from the first end of the second inclined part 340 to the second end of the second inclined part 340. The door 200 moves upward and then downward under the action of the abutment part 410 and the inclined part.

[0133] The first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420. The moving direction of the first hinge shaft 310 is close to that of the second hinge shaft 320, thereby making the horizontal movement of the door body 200 more stable under the drive of the first hinge shaft 310 and the second hinge shaft 320, and reducing the jerking sensation of the door body 200 during the rotation and closing process.

[0134] In some embodiments, the first groove segment 421 may be configured as a straight groove segment. When the first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420, the moving direction of the first hinge shaft 310 is the same as the moving direction of the second hinge shaft 320.

[0135] For example, when the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle, and the abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330. The abutment part 410 does not contact the first inclined part 330 and the second inclined part 340.

[0136] When the opening angle φ of the door 200 is set to 30 degrees, the opening angle φ of the door 200 is set to the first set angle, and the abutment part 410 is located at the first end of the first inclined part 330, as shown in Figure 12. The first hinge shaft 310 moves to the first inflection point P of the track groove 420. Alternatively, the first hinge shaft 310 moves into the first groove segment 421. When the opening angle φ of the door 200 is set to 20 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330. As shown in Figures 15 and 16, the first hinge shaft 310 and the second hinge shaft 320 move toward the first end of the track groove 420.

[0137] When the opening angle φ of the door body 200 is 20 degrees, the opening angle φ of the door body 200 is set to the second set angle. The abutting part 410 abuts against the second end of the first inclined part 330, as shown in Figure 13. The first hinge shaft 310 can be located in the first groove section 421, and the second hinge shaft 320 can be located in the first groove section 421.

[0138] When the opening angle φ of the door 200 is 10 degrees, the opening angle φ of the door 200 is set to the third preset angle, and the abutment part 410 abuts against the second end of the second inclined part 340. When the opening angle φ of the door 200 is set to 0 degrees ≤ φ < 15 degrees, the abutment part 410 abuts against the surface of the fixed member 300 facing the movable member 400.

[0139] When the opening angle φ of the door 200 is greater than the third set angle and less than the second set angle, the first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420, thereby making the horizontal movement of the door 200 more stable under the drive of the first hinge shaft 310 and the second hinge shaft 320.

[0140] Phase 1

[0141] During the rotation and closing of the door 200, when the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle. The abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330, and the abutment part 410 does not contact the first inclined part 330 and the second inclined part 340. The abutment part 410 moves toward the first inclined part 330. When the opening angle φ of the door 200 is 30 degrees, the door 200 is at the first set angle, and the abutment part 410 can move to the first end of the first inclined part 330.

[0142] The first hinge shaft 310 and the second hinge shaft 320 can move within the track groove 420 from the second end of the track groove 420 toward the first end of the track groove 420. The second hinge shaft 320 can move through the second groove segment 422 to the first groove segment 421. The first hinge shaft 310 can move from the third groove segment 423 through the second groove segment 422 to the first inflection point P. Alternatively, the first hinge shaft 310 can move from the third groove segment 423 through the second groove segment 422 to the first groove segment 421.

[0143] When the opening angle of the door 200 is greater than 30 degrees, the angle between the moving direction of the first hinge axis 310 and the moving direction of the second hinge axis 320 is large, and the forces on the first hinge axis 310 and the second hinge axis 320 are large. The abutting part 410 abuts against the fixing member 300, so that the door 200 only needs to move in the horizontal direction and does not need to move in the vertical direction, making the rotation process of the door 200 more stable.

[0144] Phase Two

[0145] When the opening angle φ of the door 200 is set to 20 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330. Under the action of gravity, the door 200 can drive the abutment part 410 to move upward, so that the abutment part 410 moves from the first end of the first inclined part 330 to the second end of the first inclined part 330. The movable member 400 drives the door 200 to move upward through the abutment part 410. When the opening angle φ of the door 200 is 20 degrees, the door 200 is at the second set angle, and the abutment part 410 moves to the second end of the first inclined part.

[0146] The first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420. The moving direction of the first hinge shaft 310 is close to that of the second hinge shaft 320, thereby making the horizontal movement of the door body 200 more stable under the drive of the first hinge shaft 310 and the second hinge shaft 320.

[0147] Phase Three

[0148] When the opening angle φ of the door 200 is set to 10 degrees ≤ φ < 20 degrees, the abutment part 410 abuts against the second inclined part 340, thereby causing the abutment part 410 to move downwards at an angle on the second inclined part 340. When the opening angle φ of the door 200 is ≤ 10 degrees, the abutment part 410 can abut against the fixing member 300, and the door seal located on the rear wall of the door 200 fits against the front end face of the box 100 to effectively seal the connection between the door 200 and the box 100.

[0149] For example, when the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle, and the abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330. The abutment part 410 does not contact the first inclined part 330 and the second inclined part 340.

[0150] When the opening angle φ of the door 200 is set to 30 degrees, the opening angle φ of the door 200 is set to the first set angle, the abutment part 410 is located at the first end of the first inclined part 330, and the first hinge shaft 310 moves to the first inflection point P of the track groove 420. When the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330.

[0151] When the opening angle φ of the door body 200 is 15 degrees, the opening angle φ of the door body 200 is set to the second set angle, the abutting part 410 abuts against the second end of the first inclined part 330, the first hinge shaft 310 can be located in the first groove section 421, and the second hinge shaft 320 can be located in the first groove section 421.

[0152] When the opening angle φ of the door 200 is 0 degrees, the opening angle φ of the door 200 is set to the third set angle, and the abutment part 410 abuts against the second end of the second inclined part 340.

[0153] When the opening angle φ of the door 200 is greater than the third set angle and less than the second set angle, the first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420, thereby making the horizontal movement of the door 200 more stable under the drive of the first hinge shaft 310 and the second hinge shaft 320.

[0154] Phase 1

[0155] During the rotation and closing of the door 200, when the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle. The abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330, and the abutment part 410 does not contact the first inclined part 330 and the second inclined part 340. The abutment part 410 moves toward the first inclined part 330. When the opening angle φ of the door 200 is 30 degrees, the door 200 is at the first set angle, and the abutment part 410 can move to the first end of the first inclined part 330.

[0156] The first hinge shaft 310 and the second hinge shaft 320 can move from the second end of the track groove 420 toward the first end of the track groove 420 within the track groove 420. The second hinge shaft 320 can move through the second groove segment 422 to the first groove segment 421. The first hinge shaft 310 can move from the third groove segment 423 through the second groove segment 422 to the first inflection point P.

[0157] When the opening angle of the door 200 is greater than 30 degrees, the angle between the moving direction of the first hinge axis 310 and the moving direction of the second hinge axis 320 is large, and the forces on the first hinge axis 310 and the second hinge axis 320 are large. The abutting part 410 abuts against the fixing member 300, so that the door 200 only needs to move in the horizontal direction and does not need to move in the vertical direction, making the rotation process of the door 200 more stable.

[0158] Phase Two

[0159] When the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330. Under the action of gravity, the door 200 can drive the abutment part 410 to move upward, so that the abutment part 410 moves from the first end of the first inclined part 330 to the second end of the first inclined part 330. The movable member 400 drives the door 200 to move upward through the abutment part 410. When the opening angle φ of the door 200 is 15 degrees, the door 200 is at the second set angle, and the abutment part 410 moves to the second end of the first inclined part.

[0160] The first hinge shaft 310 and the second hinge shaft 320 move within the first groove segment 421 of the track groove 420. The moving direction of the first hinge shaft 310 is close to that of the second hinge shaft 320, thereby making the horizontal movement of the door body 200 more stable under the drive of the first hinge shaft 310 and the second hinge shaft 320.

[0161] Phase Three

[0162] When the opening angle φ of the door 200 is set to 0 degrees ≤ φ < 15 degrees, the abutment part 410 abuts against the second inclined part 340, thereby causing the abutment part 410 to move downwards at an angle on the second inclined part 340. When the opening angle φ of the door 200 is 0 degrees, the abutment part 410 can abut against the fixing member 300, and the door seal located on the rear wall of the door 200 fits against the front end face of the box 100 to effectively seal the connection between the door 200 and the box 100.

[0163] For example, the number of hinge axes can be set to one.

[0164] When the abutment portion 410 is located at the first end of the second inclined portion 340, the door body 200 is at its highest point. A first distance is provided between the bottom of the abutment portion 410 and the upper surface of the fixing member 300. The first distance is set to be greater than or equal to 3 mm and less than or equal to 6 mm. For example, the first distance can be set to any distance range of 3 mm-3.5 mm, 3.5 mm-4 mm, 4 mm-4.5 mm, 4.5 mm-5 mm, 5 mm-5.5 mm, and 5.5 mm-6 mm.

[0165] When the abutment portion 410 is located at the end of the first inclined portion 330 away from the second inclined portion 340, a second distance is provided between the bottom of the abutment portion 410 and the upper surface of the fixing member 300. The second distance is set to be greater than or equal to 5 mm and less than or equal to 8 mm. For example, the second distance can be set to any of the following distance ranges: 5 mm-5.5 mm, 5.5 mm-6 mm, 6 mm-6.5 mm, 6.5 mm-7 mm, 7 mm-7.5 mm, and 7.5 mm-8 mm. This is to reduce the possibility of the hinge shaft being damaged by excessive impact force from the door body 200 while ensuring the gravity self-closing effect.

[0166] The vertical movement distance of the door body 200 can be greater than or equal to 2 mm and less than or equal to 10 mm. For example, the vertical movement distance of the door body 200 can be set within any length range of 2 mm-3 mm, 3 mm-4 mm, 4 mm-5 mm, 5 mm-6 mm, 6 mm-7 mm, 7 mm-8 mm, 8 mm-9 mm, and 9 mm-10 mm to reduce the user's sense of jerkiness during the closing process.

[0167] For example, the end of the first inclined portion 330 away from the second inclined portion 340 faces the front side of the box 100, and the angle between the tangent direction of the end of the first inclined portion 330 away from the second inclined portion 340 and the side of the box 100 is less than or equal to 15 degrees. For example, the angle between the tangent direction of the end of the first inclined portion 330 away from the second inclined portion 340 and the side of the box 100 can be set within any angle range of 0-5 degrees, 5-10 degrees, and 10-15 degrees.

[0168] In this embodiment, when the abutting part 410 moves to the side of the first inclined part 330 away from the second inclined part 340, the abutting part 410 can be suspended in the air and may not contact any surface of the fixing member 300. The bottom height of the abutting part 410 may be lower than or equal to the height of the first inclined part 330 away from the second inclined part 340. For example, when the bottom of the abutting part 410 is disengaged from the first inclined part 330, the height of the abutting part 410 may remain unchanged, or the height of the abutting part 410 may continue to decrease, thereby further reducing the distance between the movable member 400 and the fixing member 300.

[0169] The fastener 300 may have a hollow area. When the abutment portion 410 is located on the side of the first inclined portion 330 away from the second inclined portion 340, the abutment portion 410 is located in the hollow area, so that the abutment portion 410 does not contact any surface of the fastener 300, reducing the friction between the abutment portion 410 and the fastener 300, making the rotation process of the door 200 smoother.

[0170] For example, when the abutment portion 410 moves to the side of the first inclined portion 330 away from the second inclined portion 340, the abutment portion 410 can abut against the surface of the fixing member 300 facing the movable member 400; however, compared with the embodiment where the abutment portion 410 abuts against the fixing member 300, in this embodiment the abutment portion 410 is suspended, so that it is not necessary to provide a structure to support the abutment portion 410 on the side of the first inclined portion 330 away from the second inclined portion 340, further reducing the assembly space required for the fixing member, and making the gravity self-closing structure more compact; in addition, the suspension of the abutment portion 410 can also reduce the friction between the abutment portion 410 and the fixing member 300, making the rotation process of the door 200 smoother.

[0171] Furthermore, compared to the embodiment where the first inclined portion 330 and the second inclined portion 340 are located around the hinge axis, by spaced the connected first inclined portion 330 and the second inclined portion 340 at intervals on the hinge axis, the arrangement of the first inclined portion 330 and the second inclined portion 340 is more flexible. The bottom of the abutment portion 410 can be closer to the surface of the fixed member 300 facing the movable member 400 relative to the bottom of the track groove 420, making the gravity self-closing structure more compact and reducing the distance between the lower end of the door body 200 and the hinge plate 350.

[0172] When the abutment part 410 moves to the side of the first inclined part 330 away from the second inclined part 340, the abutment part 410 is suspended, which can further reduce the distance between the lower end of the door body 200 and the hinge plate 350, reduce the assembly space required for the fixed part 300 and the movable part 400, and make the arrangement between the fixed part 300 and the movable part 400 more compact, thereby increasing the height of the door body 200 and the volume of the door body 200; and when the height of the door body 200 increases, the length of the cabinet 100 can be increased downward, thereby increasing the volume of the cabinet 100 without changing the overall height of the refrigerator.

[0173] It should be noted that when the abutting part 410 moves to the side of the first inclined part 330 away from the second inclined part 340, the abutting part 410 abuts against the upper surface of the fixing member 300, and there is a first gap between the lower surface of the movable member 400 and the upper surface of the fixing member 300, the width of the first gap is set to d1.

[0174] In this embodiment, when the abutting part 410 moves to the side of the first inclined part 330 away from the second inclined part 340, the abutting part 410 is suspended, and the bottom of the abutting part 410 can move to below the upper surface of the fixing member 300, so that the lower surface of the movable member 400 can be closer to the upper surface of the fixing member 300. There is a second gap between the lower surface of the movable member 400 and the upper surface of the fixing member 300. The width of the second gap is set to d2, and the difference between d1 and d2 can be set to d3.

[0175] In contrast to the embodiment where the abutting part 410 abuts against the fastener 300, the bottom end of the abutting part 410 abuts against the upper surface of the fastener 300. In this embodiment, d3 can be equal to the height difference between the bottom end of the abutting part 410 and the upper surface of the fastener 300, thereby further reducing the assembly space required for the fastener 300 and the movable part 400.

[0176] It should be noted that in the embodiment where the abutting part 410 abuts against the fixing member 300, a support part is usually provided on the outer side of the hinge shaft and / or below the track groove 420 to provide support, so that the support part and the abutting part 410 jointly support and form the first gap. In the embodiment of this application, by reducing the distance between the lower surface of the movable member 400 and the upper surface of the fixing member 300, the height of the support part is reduced, thereby further reducing the distance between the fixing member 300 and the movable member 400.

[0177] When the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle, and the abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330. The abutment part 410 does not contact the first inclined part 330 and the second inclined part 340.

[0178] When the opening angle φ of the door 200 is set to 30 degrees, the opening angle φ of the door 200 is set to the first set angle, the abutment part 410 is located at the first end of the first inclined part 330, and the hinge shaft moves to the first inflection point P of the track groove 420, or the hinge shaft is located in the first groove segment 421. When the opening angle φ of the door 200 is set to 20 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330.

[0179] When the opening angle φ of the door body 200 is 15 degrees, the opening angle φ of the door body 200 is set to the second set angle, the abutting part 410 abuts against the second end of the first inclined part 330, and the hinge shaft can be located in the first groove section 421.

[0180] When the opening angle φ of the door 200 is 0 degrees, the opening angle φ of the door 200 is set to the third set angle, and the abutment part 410 abuts against the second end of the second inclined part 340.

[0181] When the opening angle φ of the door 200 is greater than the third set angle and less than the second set angle, the hinge shaft moves within the first groove segment 421 of the track groove 420, thereby making the horizontal movement of the door 200 more stable under the drive of the hinge shaft.

[0182] Phase 1

[0183] During the rotation and closing of the door 200, when the opening angle φ of the door 200 is greater than 30 degrees, the opening angle φ of the door 200 is greater than the first set angle. The abutment part 410 is located on the side of the first end of the first inclined part 330 away from the second end of the first inclined part 330, and the abutment part 410 does not contact the first inclined part 330 and the second inclined part 340. The abutment part 410 moves toward the first inclined part 330. When the opening angle φ of the door 200 is 30 degrees, the door 200 is at the first set angle, and the abutment part 410 can move to the first end of the first inclined part 330.

[0184] The hinge shaft can move from the second end of the track groove 420 toward the first end of the track groove 420 within the track groove 420. The hinge shaft can move from the third groove segment 423 through the second groove segment 422 to the first inflection point P. Alternatively, the hinge shaft can move from the third groove segment 423 through the second groove segment 422 into the first groove segment 421.

[0185] When the opening angle of the door 200 is greater than 30 degrees, the abutting part 410 abuts against the fixing member 300, so that the door 200 only needs to move in the horizontal direction and does not need to move in the vertical direction, making the rotation process of the door 200 more stable.

[0186] Phase Two

[0187] When the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 30 degrees, the abutment part 410 abuts against the first inclined part 330. Under the action of gravity, the door 200 can drive the abutment part 410 to move upward, so that the abutment part 410 moves from the first end of the first inclined part 330 to the second end of the first inclined part 330. The movable member 400 drives the door 200 to move upward through the abutment part 410. When the opening angle φ of the door 200 is 15 degrees, the door 200 is at the second set angle, and the abutment part 410 moves to the second end of the first inclined part.

[0188] The hinge axis moves within the first groove segment 421 of the track groove 420, thereby making the horizontal movement of the door body 200 more stable under the drive of the hinge axis.

[0189] Phase Three

[0190] When the opening angle φ of the door 200 is set to 0 degrees ≤ φ < 15 degrees, the abutment part 410 abuts against the second inclined part 340, thereby causing the abutment part 410 to move downwards at an angle on the second inclined part 340. When the opening angle φ of the door 200 is 0 degrees, the abutment part 410 can abut against the fixing member 300, and the door seal located on the rear wall of the door 200 fits against the front end face of the box 100 to effectively seal the connection between the door 200 and the box 100.

[0191] When the door 200 is at the third preset angle, the door 200 may not be in a closed state. Alternatively, the door 200 may not be in a closed state.

[0192] The third setting angle can be set to be greater than or equal to -5 degrees, less than or equal to 10 degrees, and less than the second setting angle. For example, the third setting angle can be set within any of the following angle ranges: -5 degrees to 0 degrees, 0 degrees to 5 degrees, 5 degrees to 8 degrees, 8 degrees to 10 degrees, 10 degrees to 12 degrees, 12 degrees to 15 degrees, 15 degrees to 18 degrees, and 18 degrees to 20 degrees.

[0193] During the process of the door 200 rotating to open or close, the user pulls or pushes the door 200 to rotate around the first hinge axis 310 and the second hinge axis 320. When the door 200 rotates to between the second set angle and the third set angle, the door 200 moves vertically relative to the fixed member 300 under the drive of the movable member 400.

[0194] During the process of the door 200 rotating and opening, the door 200 can rotate from the third set angle to the second set angle, the opening angle of the door 200 gradually increases, and the door 200 moves upward in the vertical direction under the action of the abutment part 410.

[0195] The smaller the angle of the third setting angle, the sooner the user will feel the door 200 rising during the opening process. The smaller the angle of the second setting angle, the sooner the user will feel the end of the door 200 rising process during the opening process. The smaller the difference between the second and third setting angles, the shorter the door 200 rising process will feel to the user during the opening process.

[0196] During the process of the door 200 rotating and closing, the door 200 can rotate from the second set angle to the third set angle, the opening angle of the door 200 gradually decreases, and the door 200 drives the abutment part 410 to move downward in the vertical direction.

[0197] The smaller the second set angle, the sooner the user will feel the door 200 descending during the closing process. The smaller the third set angle, the sooner the user will feel the door 200 descending process ending during the opening process. The smaller the difference between the second and third set angles, the shorter the door 200 descending process will feel for the user during the opening process.

[0198] In some embodiments, the surface of the fixing member 300 facing the movable member 400 may be provided with a first inclined portion 330 and a second inclined portion 340. The first end of the first inclined portion 330 is connected to the fixing member 300, and the second end of the first inclined portion 330 is closer to the movable member 400 relative to the first end of the first inclined portion 330. The first inclined portion 330 is inclined upwards. The first end of the first inclined portion 330 is the bottom end, and the first end of the first inclined portion 330 is the top end. In other words, the first inclined portion 330 extends upwards from the first end to the second end.

[0199] The first end of the second inclined portion 340 is connected to the second end of the first inclined portion 330, and the second end of the second inclined portion 340 is connected to the fixing member 300. The second inclined portion 340 is inclined downward. The first end of the second inclined portion 340 is the top end of the second inclined portion 340, and the second end of the second inclined portion 340 is the bottom end of the second inclined portion 340. In other words, the second inclined portion 340 extends downward from the first end to the first end.

[0200] The surface of the movable member 400 facing the fixed member 300 may be provided with an abutment portion 410, which can be used to abut against the surface of the fixed member 300 facing the movable member 400. The abutment portion 410 can also be used to abut against the first inclined portion 330 and the second inclined portion 340, so that the movable member 400 drives the door body 200 to move up and down in the vertical direction through the abutment portion 410.

[0201] The height of the first inclined portion 330 can be equal to the height of the second inclined portion 340, and the first inclined portion 330 can be connected to the second inclined portion 340 so that the abutting portion 410 can move from the first inclined portion 330 to the second inclined portion 340, or from the second inclined portion 340 to the first inclined portion 330.

[0202] The first inclined portion 330 can be configured such that when the abutting portion 410 abuts against the first inclined portion 330 and moves from the first end of the first inclined portion 330 to the second end of the first inclined portion 330, the movable member 400 can drive the door body 200 to move upward through the abutting portion 410. When the abutting portion 410 abuts against the first inclined portion 330 and moves from the second end of the first inclined portion 330 to the first end of the first inclined portion 330, the movable member 400 can drive the door body 200 to move downward through the abutting portion 410.

[0203] The second inclined portion 340 can be configured such that when the abutting portion 410 abuts against the second inclined portion 340 and moves from the first end of the second inclined portion 340 to the second end of the second inclined portion 340, the movable member 400 can drive the door body 200 to move downward through the abutting portion 410. When the abutting portion 410 abuts against the second inclined portion 340 and moves from the second end of the second inclined portion 340 to the first end of the second inclined portion 340, the movable member 400 can drive the door body 200 to move upward through the abutting portion 410.

[0204] For example, when the door 200 is in the closed state (i.e., φ = 0°), the abutment portion 410 can abut against the surface of the fixed member 300 facing the movable member 400, and the abutment portion 410 can be located on the side of the second inclined portion 340 away from the first inclined portion 330. When the door 200 is in the open state (e.g., φ = 90°), the abutment portion 410 can abut against the surface of the fixed member 300 facing the movable member 400, and the abutment portion 410 is located on the side of the first inclined portion 330 away from the second inclined portion 340.

[0205] During the rotation and opening of the door 200, the abutment part 410 can move from the surface of the fixing member 300 to the second end of the second inclined part 340, and then move along the second end of the second inclined part 340 to the first end of the second inclined part 340. The movable member 400 drives the door 200 to move upward through the abutment part 410.

[0206] The abutting part 410 moves from the first end of the second inclined part 340 to the second end of the first inclined part 330, and then moves along the second end of the first inclined part 330 back to the first end of the first inclined part 330. The movable member 400 drives the door body 200 to move downward through the abutting part 410, so that the abutting part 410 can move from the first end of the first inclined part 330 to the surface of the fixed member 300 facing the movable member 400, so that the abutting part 410 can move from the side of the second inclined part 340 away from the first inclined part 330 to the side of the first inclined part 330 away from the second inclined part 340.

[0207] During the process of the door 200 rotating and closing, the abutment part 410 can move from the surface of the fixing member 300 to the first end of the first inclined part 330, and then move along the first end of the first inclined part 330 to the second end of the first inclined part 330. The movable member 400 drives the door 200 to move upward through the abutment part 410.

[0208] The abutting part 410 moves from the second end of the first inclined part 330 to the first end of the second inclined part 340, and moves along the first end of the second inclined part 340 to the second end of the second inclined part 340. The movable member 400 drives the door body 200 to move downward through the abutting part 410, so that the abutting part 410 can move from the second end of the second inclined part 340 to the surface of the fixed member 300 facing the movable member 400, so that the abutting part 410 can move from the side of the first inclined part 330 away from the second inclined part 340 to the side of the second inclined part 340 away from the first inclined part 330.

[0209] When the abutting portion 410 is located on the surface of the fastener 300, the bottom of the abutting portion 410 may abut against the surface of the fastener 300, or the bottom of the abutting portion 410 may be spaced apart from the surface of the fastener 300. For example, the following description assumes that the bottom of the abutting portion 410 abuts against the surface of the fastener 300.

[0210] The door 200 has a certain weight. During the process of rotating and opening the door 200, it is necessary to overcome the weight of the door 200 so that the door 200 can drive the abutment part 410 from the second end of the second inclined part 340 to the first end of the second inclined part 340. Thus, the second inclined part 340 plays a certain limiting role on the abutment part 410, reducing the possibility of the abutment part 410 moving. Furthermore, during the process of rotating and closing the door 200, when the abutment part 410 abuts against the second inclined part 340, the abutment part 410 can move towards the second end of the second inclined part 340 under the action of the weight of the door 200, making it more convenient for the door 200 to move to the side of the second inclined part 340 away from the first inclined part 330.

[0211] For example, when the abutment part 410 moves to the side of the second inclined part 340 away from the first inclined part 330, the door seal located on the rear wall of the door body 200 can surround the access opening, so that the door seal fits against the front end face of the box body 100 to effectively seal the connection between the door body 200 and the box body 100. Thus, the gravity self-closing structure and the door seal work together to ensure that the door body 200 seals the access opening and prevents cold air from escaping.

[0212] Referring to Figures 17-19, in some embodiments, the first hinge shaft 310 contacts the track groove 420 to form a first contact point, the second hinge shaft 320 contacts the track groove 420 to form a second contact point, and the abutment portion 410 and one of the first inclined portion 330 and the second inclined portion 340 form a third contact point. The first contact point, the second contact point and the third contact point are not collinear.

[0213] When the abutting part 410 abuts against the first inclined part 330 or the second inclined part 340, the movable part 400 can abut against the fixed part 300 at three positions: the first contact point, the second contact point, and the third contact point. The first contact point, the second contact point, and the third contact point are not collinear, so that the fixed part 300 can apply a supporting force to the movable part 400 from different positions, thereby making the movement process of the movable part 400 more stable.

[0214] During the rotation and closing process of the door, Figure 17 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part 410 abuts against the first end of the first inclined part 330 according to an embodiment of this application. Figure 18 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part 410 abuts against the second end of the first inclined part 330 according to an embodiment of this application. Figure 19 is a schematic diagram showing the position of the first contact point, the second contact point, and the third contact point forming a triangle when the abutting part 410 abuts against the second end of the second inclined part 340 according to an embodiment of this application.

[0215] It should be noted that the first contact point, the second contact point, and the third contact point form a triangle, and the interior angle of the triangle can be greater than or equal to 20 degrees. During the rotation and closing process of the door, the interior angle of the triangle formed by the first contact point, the second contact point, and the third contact point is greater than or equal to 20 degrees.

[0216] Because the moving part 400 experiences different force directions when it contacts the fixed part 300 at the three positions of the first contact point, the second contact point and the third contact point, the moving part 400 can move relative to the first hinge axis 310 and the second hinge axis 320 in the horizontal direction, and can also generate displacement relative to the first inclined part 330 and the second inclined part 340 in the vertical direction.

[0217] The interior angles of the triangle formed by the first, second, and third contact points are all greater than or equal to 20 degrees, making the force direction of the moving part 400 more flexible and the force at each position of the first, second, and third contact points more uniform. This reduces the burden on the first hinge shaft 310, the second hinge shaft 320, the first inclined part 330, and the second inclined part 340, and reduces the possibility of deformation or breakage of any of the first hinge shaft 310, the second hinge shaft 320, the first inclined part 330, and the second inclined part 340.

[0218] In some embodiments, in the hinge assembly located at the lower end of the door body 200, the first hinge shaft 310 and the second hinge shaft 320 can be disposed on the surface of the fixed member 300 facing the movable member 400, and both the first hinge shaft 310 and the second hinge shaft 320 can extend upward in the vertical direction; and the track groove 420 can be correspondingly disposed on the surface of the movable member 400 facing the fixed member 300.

[0219] During the rotation of the door 200 to open or close, in the horizontal direction, the first hinge shaft 310 moves relative to the track groove 420 along the extension direction of the track groove 420, and the second hinge shaft 320 moves relative to the track groove 420 along the extension direction of the track groove 420. In the vertical direction, when the movable member 400 drives the door 200 to move vertically through the abutment part 410, the fixed member 300 is relatively fixed to the door 200, so that the first hinge shaft 310 moves relative to the track groove 420 in the vertical direction, and the second hinge shaft 320 moves relative to the track groove 420 in the vertical direction.

[0220] For example, when the movable part 400 drives the door body 200 to move upward through the abutment part 410, part of the first hinge shaft 310 extends out of the track groove 420, and the distance between the first hinge shaft 310 and the bottom surface of the track groove 420 increases; part of the second hinge shaft 320 extends out of the track groove 420, and the distance between the second hinge shaft 320 and the bottom surface of the track groove 420 increases.

[0221] The length of the first hinge shaft 310 extending out of the track groove 420 and the length of the second hinge shaft 320 extending out of the track groove 420 are equal to the distance between the second end of the first inclined portion 330, the first end of the second inclined portion 340 and the surface of the fixing member 300. The greater the length of the first hinge shaft 310 within the track groove 420, the better the stability of the first hinge shaft 310. The greater the length of the second hinge shaft 320 within the track groove 420, the better the stability of the second hinge shaft 320.

[0222] For example, when the distance between the second end of the first inclined portion 330, the first end of the second inclined portion 340 and the surface of the fixing member 300 remains unchanged, the stability of the first hinge shaft 310 in the track groove 420 can be improved by increasing the length of the first hinge shaft 310 and the depth of the track groove 420, and the stability of the second hinge shaft 320 in the track groove 420 can be improved by increasing the length of the second hinge shaft 320 and the depth of the track groove 420, so as to reduce the possibility of the moving member 400 disengaging from the fixing member 300.

[0223] The angle between the line connecting the first hinge axis 310 and the second hinge axis 320 and the arrangement direction of the first inclined portion 330 and the second inclined portion 340 can be set to be greater than or equal to 0 degrees and less than or equal to 45 degrees.

[0224] For example, the angle between the line connecting the first hinge axis 310 and the second hinge axis 320 and the arrangement direction of the first inclined portion 330 and the second inclined portion 340 can be set to one of 0 degrees-5 degrees, 5 degrees-10 degrees, 10 degrees-15 degrees, 15 degrees-20 degrees, 20 degrees-25 degrees, 25 degrees-30 degrees, 30 degrees-35 degrees, 35 degrees-40 degrees, and 40 degrees-45 degrees.

[0225] In some embodiments, the positions of the first inclined portion 330 and the second inclined portion 340 can be determined based on the opening angle of the door 200.

[0226] For example, when the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 25 degrees, the abutting part 410 abuts against the first inclined part 330. When the opening angle φ of the door 200 is 25 degrees, the opening angle of the door 200 is set to the first set angle, and the abutting part 410 abuts against the first end of the first inclined part 330.

[0227] When the opening angle φ of the door 200 is 15 degrees, the opening angle of the door 200 is set to the second set angle, and the abutment part 410 abuts against the second end of the first inclined part 330.

[0228] When the opening angle φ of the door 200 is set to 5 degrees ≤ φ < 15 degrees, the abutting part 410 abuts against the second inclined part 340. When the opening angle φ of the door 200 is 5 degrees, the opening angle of the door 200 is set to the third set angle, and the abutting part 410 abuts against the second end of the second inclined part 340.

[0229] When the opening angle φ of the door 200 is 15 degrees, the abutment part 410 can move from the second end of the first inclined part 330 toward the first end of the second inclined part 340.

[0230] During the rotation and closing of the door 200, when the opening angle φ of the door 200 is greater than 25 degrees, the abutment part 410 abuts against the surface of the fixing member 300, and the abutment part 410 is located on the side of the first inclined part 330 away from the second inclined part 340. When the opening angle φ of the door 200 is equal to 25 degrees, the abutment part 410 can move from the surface of the fixing member 300 to the first end of the first inclined part 330. When the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 25 degrees, the abutment part 410 abuts against the first inclined part 330, and the movable member 400 drives the door 200 to move upward through the abutment part 410.

[0231] When the opening angle φ of the door 200 is 15 degrees, the abutment part 410 can move from the second end of the first inclined part 330 to the first end of the second inclined part 340; when the opening angle φ of the door 200 is set to 5 degrees ≤ φ < 15 degrees, the abutment part 410 abuts against the second inclined part 340, and the door 200 can move the abutment part 410 downward under the action of gravity, so as to move the abutment part 410 to the second end of the second inclined part 340; when the opening angle φ of the door 200 is 5 degrees, the abutment part 410 abuts against the second end of the second inclined part 340, and the door seal on the rear wall of the door 200 fits against the front end face of the box 100 to effectively seal the connection between the door 200 and the box 100.

[0232] It should be noted that when the user pushes the door 200 to rotate and close it, the door 200 will have an upward and then downward jumping process as the abutting part 410 abuts against the first inclined part 330 and the second inclined part 340 in sequence, which will cause the user to feel a certain sense of jerkiness. The distance between the second end of the first inclined part 330, the first end of the second inclined part 340 and the surface of the fixing member 300 can be adjusted to change the vertical movement distance of the door 200, reduce the user's sense of jerkiness during the closing process and improve the user experience.

[0233] For example, the first set angle, second set angle, and third set angle of the door body 200 can be changed by adjusting the position and length of the first tilting part 330 and the second tilting part 340, thereby changing the movement time of the door body 200 in the vertical direction. For instance, when the length of the first tilting part 330 increases, the upward movement time of the door body 200 in the vertical direction increases, and the difference between the second set angle and the first set angle increases. When the length of the second tilting part 340 increases, the downward movement time of the door body 200 in the vertical direction increases, and the difference between the third set angle and the second set angle increases. And when the distance between the second end of the first tilting part 330, the first end of the second tilting part 340, and the surface of the fixing member 300 remains unchanged, the tilt angle of the first tilting part 330 decreases, and the tilt angle of the second tilting part 340 increases.

[0234] Furthermore, the position of the door body 200 at the first set angle can be changed by adjusting the position of the first end of the first tilting part 330, and the position of the door body 200 at the third set angle can be adjusted by adjusting the position of the second end of the second tilting part 340, so as to determine the movement time of the door body 200 in the vertical direction.

[0235] For example, the length of the first inclined portion 330 can be equal to the length of the second inclined portion 340, so that the inclination angle of the first inclined portion 330 is equal to the inclination angle of the second inclined portion 340. Alternatively, the length of the first inclined portion 330 can be greater than the length of the second inclined portion 340, so that the inclination angle of the first inclined portion 330 is less than the inclination angle of the second inclined portion 340. Alternatively, the length of the first inclined portion 330 can be less than the length of the second inclined portion 340, and the inclination length of the first inclined portion 330 is greater than the inclination angle of the second inclined portion 340.

[0236] For example, when the opening angle φ of the door 200 is set to 15 degrees ≤ φ ≤ 45 degrees, the abutting part 410 abuts against the first inclined part 330; when the opening angle φ of the door 200 is 45 degrees, the opening angle of the door 200 is set to the first set angle, and the abutting part 410 abuts against the first end of the first inclined part 330; when the opening angle φ of the door 200 is 15 degrees, the opening angle of the door 200 is set to the second set angle, and the abutting part 410 abuts against the first inclined part 330. The second end; when the opening angle φ of the door 200 is set to: 8 degrees ≤ φ < 15 degrees, the abutting part 410 abuts against the second inclined part 340; when the opening angle φ of the door 200 is 8 degrees, the opening angle of the door 200 is set to the third set angle, and the abutting part 410 abuts against the second end of the second inclined part 340; when the opening angle φ of the door 200 is 15 degrees, the abutting part 410 can move from the second end of the first inclined part 330 toward the first end of the second inclined part 340.

[0237] As shown in Figure 20, an end cap 31 may be provided at the upper end of the door body 200, and the end cap 31 may be fixedly disposed relative to the door body 200. In the thickness direction of the door body 200, the width of the end cap is equal to the thickness of the door body 200. A bushing 32 may be provided on the end cap 31, and the bushing 32 may be embedded in the end cap 31, with the top surface of the bushing 32 recessed relative to the top surface of the end cap 31.

[0238] The height difference between the top surface of the end cap 31 and the top surface of the bushing 32 can be greater than or equal to 0.5 mm and less than or equal to 1.5 mm. For example, the height difference between the top surface of the end cap 31 and the top surface of the bushing 32 can be set to any of the following height difference ranges: 0.5 mm-0.8 mm, 0.8 mm-1 mm, 1 mm-1.2 mm, and 1.2 mm-1.5 mm.

[0239] In the vertical direction, the height of the top surface of the bushing 32 is lower than the height of the top surface of the housing 100. The height difference between the top surface of the housing 100 and the top surface of the bushing 32 is greater than or equal to 4 mm and less than or equal to 7 mm. For example, the height difference between the top surface of the housing 100 and the top surface of the bushing 32 can be set within any of the following ranges: 4 mm-5 mm, 5 mm-6 mm, and 6 mm-7 mm, so that the door 200 can drive the bushing 32 to move up and down in the vertical direction.

[0240] The bushing 32 is provided with a track groove 420 so that the first hinge shaft 310 located on the hinge plate 350 can move relative to the track groove 420 of the bushing 32, and the second hinge shaft 320 located on the hinge plate 350 can move relative to the track groove 420 of the bushing 32.

[0241] During the process of rotating to open or close the door 200, the hinge assembly located at the upper end of the door 200 allows the first hinge shaft 310 to move relative to the track groove 420 along its horizontal extension direction in the horizontal direction, and the second hinge shaft 320 to move relative to the track groove 420 along its horizontal extension direction. In the vertical direction, the first hinge shaft 310 moves up and down relative to the track groove 420, and the second hinge shaft 320 moves up and down relative to the track groove 420.

[0242] It should be noted that the first hinge shaft 310 and the second hinge shaft 320 located at the upper end of the door body 200 are respectively set in the first hinge shaft 310 and the second hinge shaft 320 in the gravity self-closing structure. The first hinge shaft 310 located at the upper end of the door body 200 is coaxially set with the first hinge shaft 310 in the gravity self-closing structure, and the second hinge shaft 320 located at the upper end of the door body 200 is coaxially set with the second hinge shaft 320 in the gravity self-closing structure, so as to make the rotation process of the door body 200 more stable.

[0243] Furthermore, the diameter of the first hinge shaft 310 located at the upper end of the door body 200 can be less than or equal to the diameter of the first hinge shaft 310 in the gravity self-closing structure, and the diameter of the second hinge shaft 320 located at the upper end of the door body 200 can be less than or equal to the diameter of the second hinge shaft 320 in the gravity self-closing structure. For example, the thickness of the door body 200 can be set to 60 mm, the diameter of the first hinge shaft 310 and the diameter of the second hinge shaft 320 in the gravity self-closing structure can be set to 8 mm, and the diameters of the first hinge shaft 310 and the second hinge shaft 320 located at the upper end of the door body 200 can both be set to 6 mm or 7 mm.

[0244] Furthermore, referring to Figure 20, the hinge assembly located at the upper end of the door body 200, the hinge plate 350 may be provided with a shim 33, the shim 33 is used to fix the first hinge shaft 310 and the second hinge shaft 320, so as to make the installation of the first hinge shaft 310 and the second hinge shaft 320 more stable.

[0245] The shim 33 can be sleeved on the outside of the first hinge shaft 310 and the second hinge shaft 320. The number of shims 33 can be set to one or two. For example, the first hinge shaft 310 and the second hinge shaft 320 can be fixed by two shims 33 respectively, or the first hinge shaft 310 and the second hinge shaft 320 can be fixed by one shim 33 at the same time.

[0246] The thickness of the gasket 33 can be set to be greater than or equal to 0.6 mm and less than or equal to 1.5 mm. For example, the thickness of the gasket 33 can be set within any of the following thickness ranges: 0.6 mm-0.8 mm, 0.8 mm-1 mm, 1 mm-1.2 mm, and 1.2 mm-1.5 mm.

[0247] The greater the thickness of the shim 33, the more stable the connection between the first hinge shaft 310 and the second hinge shaft 320 and the hinge plate 350. The smaller the thickness of the shim 33, the greater the length of the first hinge shaft 310 extending out of the shim 33, and the greater the length of the second hinge shaft 320 extending out of the shim 33. When the depth of the bushing 32 remains unchanged, the smaller the thickness of the shim 33, the smaller the total length of the first hinge shaft 310 and the second hinge shaft 320, and the more compact the hinge assembly structure at the upper end of the door body 200, thus reducing the assembly space required for the hinge assembly at the upper end of the door body 200.

[0248] In some embodiments, for the hinge plate 350 disposed at the lower end of the housing 100, the surface of the hinge plate 350 facing away from the first hinge axis 310 and the second hinge axis 320 is provided with a pad. The hinge plate 350 is supported by the pad so that the weight of the door 200 can be transferred to the ground through the pad, thereby reducing the force on the hinge plate 350 and reducing the possibility of the hinge plate 350 bending or breaking.

[0249] The hinge plate 350 is also equipped with a rotatable roller. The roller has a rotating surface, and the bottom surface of the rotating surface is flush with the bottom of the pad. The rotating surface drives the box 100 to move, making the movement of the box 100 more convenient.

[0250] In some embodiments, as shown in FIG3, the abutment portion 410 may be provided with a first abutment surface 411 and abutment surface 412 connected to each other, and both the first abutment surface 411 and the second abutment surface 412 are inclined relative to the vertical direction.

[0251] When the door 200 is in the closed state (i.e., φ = 0°), the bottom of the abutment portion 410 can abut against the surface of the fixing member 300 facing the moving member 400, and the abutment portion 410 can be located on the side of the second inclined portion 340 away from the first inclined portion 330; when the door 200 is in the open state (e.g., φ = 90°), the bottom of the abutment portion 410 can abut against the surface of the fixing member 300 facing the moving member 400, and the abutment portion 410 is located on the side of the first inclined portion 330 away from the second inclined portion 340.

[0252] In the first abutting surface 411 and the second abutting surface 412, the first abutting surface 411 is used to abut the inclined surface of the first inclined portion 330, and the second abutting surface 412 is used to abut the inclined surface of the second inclined portion 340, and the bottom end of the first abutting surface 411 is connected to the bottom end of the second abutting surface 412.

[0253] During the rotation and opening of the door 200, the bottom of the abutment portion 410 can move from the surface of the fixing member 300 to the second end of the second inclined portion 340, and the second abutment surface 412 can move along the second end of the second inclined portion 340 to the first end of the second inclined portion 340. The movable member 400 drives the door 200 to move upward through the abutment portion 410; and the bottom of the abutment portion 410 moves from the first end of the second inclined portion 340 to the second end of the first inclined portion 330 through the arc surface. The first abutment surface 411 can move along the second end of the first inclined portion 330 to the first end of the first inclined portion 330. The movable member 400 drives the door 200 to move downward through the abutment portion 410, so that the abutment portion 410 can move from the first end of the first inclined portion 330 to the surface of the fixing member 300 facing the movable member 400, so that the abutment portion 410 can move from the side of the second inclined portion 340 away from the first inclined portion 330 to the side of the first inclined portion 330 away from the second inclined portion 340.

[0254] During the rotation and closing of the door 200, the bottom of the abutment portion 410 can move from the surface of the fixing member 300 to the first end of the first inclined portion 330, the first abutment surface 411 moves along the first end of the first inclined portion 330 to the second end of the first inclined portion 330, and the movable member 400 drives the door 200 to move upward through the abutment portion 410; and the bottom of the abutment portion 410 moves from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the arc surface, the second abutment surface 412 moves along the first end of the second inclined portion 340 to the second end of the second inclined portion 340, and the movable member 400 drives the door 200 to move downward through the abutment portion 410, so that the abutment portion 410 can move from the second end of the second inclined portion 340 to the surface of the fixing member 300 facing the movable member 400, so that the abutment portion 410 can move from the side of the first inclined portion 330 away from the second inclined portion 340 to the side of the second inclined portion 340 away from the first inclined portion 330.

[0255] For example, in a vertical plane, when the surface of the fixing member 300 of the abutment portion 410 moves to the first end of the first inclined portion 330, the first abutment surface 411 can be parallel to or overlap with the inclined surface of the first inclined portion 330; when the second abutment surface 412 moves along the first end of the second inclined portion 340 to the second end of the second inclined portion 340, the second abutment surface 412 can be parallel to or overlap with the inclined surface of the second inclined portion 340, so as to increase the contact area between the first abutment surface 411 and the first inclined portion 330 and the contact area between the second abutment surface 412 and the second inclined portion 340, thereby improving the stability of the bottom end of the abutment portion 410 moving along the moving path during the rotation and closing of the door body 200.

[0256] In some embodiments, as shown in FIG9, when the bottom of the abutment portion 410 moves to the first end of the second inclined portion 340, the first abutment surface 411 and the second abutment surface 412 are mirror images of the second inclined portion 340 and the first inclined portion 330.

[0257] The first abutment surface 411 and the second abutment surface 412 can be inclined surfaces. When the door 200 is opened at different angles, the first abutment surface 411 and the second abutment surface 412 contact different positions of the first inclined portion 330 and the second inclined portion 340.

[0258] When the bottom of the abutting part 410 is located at the connection between the surface of the fixing member 300 and the first end of the first inclined part 330, the first abutting surface 411 is in contact with the first inclined part 330. When the abutting part 410 moves from the first end of the first inclined part 330 toward the second end of the first inclined part 330, the area of ​​the first abutting surface 411 in contact with the first inclined part 330 gradually decreases. When the abutting part 410 moves to the second end of the first inclined part 330, the first abutting surface 411 completely detaches from the first inclined part 330, and the bottom of the abutting part 410 abuts against the arc surface.

[0259] When the bottom of the abutting part 410 moves to the first end of the second inclined part 340 and moves from the first end of the second inclined part 340 toward the second end of the second inclined part 340, the area of ​​the second abutting surface 412 that is in contact with the second inclined part 340 gradually increases. When the abutting part 410 moves to the second end of the second inclined part 340, the contact area between the second abutting surface 412 and the second inclined part 340 is at its maximum, and the bottom of the abutting part 410 abuts against the surface of the fixed member 300 toward the movable member 400.

[0260] When the tilt angle of the first inclined portion 330 is equal to the tilt angle of the second inclined portion 340, the tilt angle of the first abutting surface 411 can be equal to the tilt angle of the second abutting surface 412; when the tilt angle of the first inclined portion 330 is less than the tilt angle of the second inclined portion 340, the tilt angle of the first abutting surface 411 can be correspondingly less than the tilt angle of the second inclined portion 340, so as to increase the contact area between the first abutting surface 411 and the first inclined portion 330 and the contact area between the second abutting surface 412 and the second inclined portion 340.

[0261] For example, the tilt angle of the second tilting part 340 can be greater than the tilt angle of the first tilting part 330. When the door 200 is in the closed state (i.e., when φ = 0°), the larger the tilt angle of the second tilting part 340, the more difficult it is for the second abutting surface 412 to move from the first end of the second tilting part 340 to the second end of the second tilting part 340, and the tighter the connection between the door 200 and the box 100. Thus, the sealing performance of the door 200 in closing the opening can be improved by adjusting the tilt angle of the second tilting part 340.

[0262] In some embodiments, the inclined surfaces of the first inclined portion 330 and the second inclined portion 340 can both be disposed in the same vertical plane as the moving path, that is, the inclined surfaces of the first inclined portion 330 and the second inclined portion 340 are both oriented in the vertical direction; or, the inclined surfaces of the first inclined portion 330 and the second inclined portion 340 can also be oriented towards the first hinge axis 310 and the second hinge axis 320. When the movable member 400 rotates relative to the fixed member 300 through the first hinge axis 310 and the second hinge axis 320, the abutment portion 410 can abut against the surfaces of the first inclined portion 330 and the second inclined portion 340 facing the first hinge axis 310 and the second hinge axis 320.

[0263] In some embodiments, a protruding structure is provided on the surface of the fixing member 300 facing the movable member 400, the protruding structure having an uphill section and a downhill section. The uphill section and the downhill section can be formed as an integral structure. The uphill section and the downhill section can also be provided separately.

[0264] In some embodiments, as shown in FIG5, the uphill section and the downhill section correspond to the first inclined section 330 and the second inclined section 340.

[0265] For example, on the surface of the fixing member 300 facing the moving member 400, a first inclined portion 330 and a second inclined portion 340 are integrally formed into a protruding structure. The first surface of the protruding structure faces the first hinge axis 310 and the second hinge axis 320, and the second surface of the protruding structure faces away from the first hinge axis 310 and the second hinge axis 320. An inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340 are formed between the first surface and the second surface of the protruding structure. In some embodiments, the first surface and the second surface of the protruding structure extend obliquely upward from the surface of the fixing member 300. In other words, the first surface and the second surface of the protruding structure are the two sides of the inclined surface of the protruding structure. The extending directions of the first surface, the second surface, and the inclined surface of the protruding structure are the same as or similar to the rotation path of the door 200 when it opens.

[0266] In some embodiments, the first surface of the protruding structure is further formed into an arc surface. In some embodiments, the second surface of the protruding structure may also be formed into an arc surface. In some embodiments, the inclined surfaces of the first inclined portion 330 and the second inclined portion 340 may be arc-shaped surfaces. In some embodiments, the inclined surfaces of the first inclined portion 330 and the arc-shaped surfaces of the second inclined portion 340 may be connected to form a continuous arc-shaped surface.

[0267] In some embodiments, an abutment portion 410 is provided on the surface of the movable member 400 facing the fixed member 300. The abutment portion 410 may be a protrusion protruding from the surface of the movable member 400. The protrusion has a contact surface for contacting a protruding structure on the fixed member 300 and moves along the protruding structure when the door body 200 rotates.

[0268] In some embodiments, the protrusion may be a roller, a wheel, an inclined block, a protrusion, a wedge block, an arc block, or other structures.

[0269] In one embodiment, as shown in FIG3, a first inclined member and a second inclined member forming a protrusion are provided on the surface of the movable member 400 facing the fixed member 300. The first inclined member and the second inclined member have a first abutting surface 411 and a second abutting surface 412 respectively for contacting the protruding structure on the fixed member 300.

[0270] On the surface of the movable member 400 facing the fixed member 300, the first surface of the abutment portion 410 faces the track groove 420, the second surface of the abutment portion 410 faces away from the track groove 420, and the third surface of the abutment portion 410 faces the fixed member 300. The third surface of the abutment portion 410 forms a first abutment surface 411 and a second abutment surface 412 that are connected to each other; when the movable member 400 rotates relative to the fixed member 300 via the first hinge axis 310 and the second hinge axis 320, the abutment portion 410 is provided on the first surface of the protruding structure.

[0271] In some embodiments, the abutment portion 410 may be provided with a contact element, which may be a ball or a roller, etc., to reduce the friction between the abutment portion 410 and the first inclined portion 330, the abutment portion 410 and the second inclined portion 340, so that the door body 200 moves more smoothly in the vertical direction.

[0272] For example, the number of contacts can be set to one or more. When the number of contacts is set to one, the contact can be located at one of the first abutting surface 411, the second abutting surface 412, and other positions of the abutting portion 410. Alternatively, the number of contacts can be set to multiple, and the multiple contacts can be distributed at different positions of the abutting portion 410, and the multiple contacts can be used to form at least one of the first abutting surface 411 and the second abutting surface 412.

[0273] For example, the number of contact elements can be set to one, the contact element can be a roller, the roller can be set in the abutment portion 410, the rotation axis of the roller can be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340, and the first part of the roller's peripheral surface forms the first abutment surface 411, the second part of the roller's peripheral surface forms the bottom of the abutment portion 410, and the third part of the roller's peripheral surface forms the second abutment surface 412.

[0274] For example, the abutment portion 410 is provided in the receiving groove, the receiving groove accommodates a portion of the roller, at least a portion of the roller extends out of the receiving groove so that at least a portion of the circumferential surface of the roller is exposed, and the portion of the circumferential surface located outside the receiving groove is used to form a first abutment surface 411, the bottom of the abutment portion 410 and a second abutment surface 412 that are connected to each other.

[0275] During the rotation and closing of the door 200, the second part of the roller's circumference can move from the surface of the fixing member 300 to the first end of the first inclined part 330. The first part of the roller's circumference rolls into contact with the inclined surface of the first inclined part 330, and the remaining part of the first abutment surface 411 slides into contact with the inclined surface of the first inclined part 330, so that the abutment part 410 moves along the first end of the first inclined part 330 to the second end of the first inclined part 330. Then, the third part of the roller's circumference rolls into contact with the inclined surface of the second inclined part 340, and the remaining part of the second abutment surface 412 slides into contact with the inclined surface of the second inclined part 340, so that the abutment part 410 moves along the first end of the second inclined part 340 to the second end of the second inclined part 340. This reduces the friction between the abutment part 410 and the fixing member 300 through the contact member.

[0276] Alternatively, when the number of contact elements can be set to multiple, the first part of the contact elements can be arranged in a direction parallel to the inclined surface of the first inclined portion 330, and the first part of the contact elements can be used to form the first abutting surface 411 of the abutting portion 410. The first part of the contact elements is used to abut against the inclined surface of the first inclined portion 330 to reduce the friction between the abutting portion 410 and the first inclined portion 330 when the door body 200 moves upward.

[0277] The second part of the multiple contact members can be arranged in a direction parallel to the inclined surface of the second inclined portion 340, and the second part of the contact members can be used to form the second abutting surface 412 of the abutting portion 410. The second part of the contact members is used to abut against the inclined surface of the second inclined portion 340 to reduce the friction between the abutting portion 410 and the second inclined portion 340 when the door body 200 moves downward.

[0278] During the rotation and closing of the door 200, the abutment portion 410 rolls against the inclined surface of the first inclined portion 330 through the first part of the contact member, and rolls against the inclined surface of the second inclined portion 340 through the second part of the contact member, so that the abutment portion 410 can roll against the first inclined portion 330 and the second inclined portion 340, thereby reducing the friction between the abutment portion 410 and the first inclined portion 330 and the second inclined portion 340 when the door 200 moves in the vertical direction.

[0279] For example, the number of contact elements is set to multiple, and the contact elements can be set as balls. Multiple balls are mounted on the abutment portion 410, and at least a portion of each ball extends out of the abutment portion 410. The portion of the ball extending out of the abutment portion 410 is used to form at least one of the first abutment surface 411 and the second abutment surface 412. For example, the first portion of the ball is used to form the first abutment surface 411, and the second portion of the ball is used to form the second abutment surface 412.

[0280] The abutting portion 410 may be provided with a first mounting groove, which may extend in a direction parallel to the first abutting surface 411. The first mounting groove contains a first portion of the ball, and the ball located in the first mounting groove extends at least partially out of the first mounting groove. The portion of the ball extending out of the first mounting groove is used to form the first abutting surface 411.

[0281] The abutment portion 410 may be provided with a second mounting groove, which may extend in a direction parallel to the second abutment surface 412. The second mounting groove contains a second portion of the ball, and the ball located in the second mounting groove extends at least partially out of the second mounting groove. The portion of the ball extending out of the second mounting groove is used to form the second abutment surface 412.

[0282] For example, the number of contact elements is set to multiple, and the contact elements can be set as rollers. The rotation axis of the first roller is perpendicular to the extension direction of the inclined surface of the first inclined portion 330, and the circumferential surface of the first roller is used to form a first abutment surface 411. The rotation axis of the second roller is perpendicular to the extension direction of the inclined surface of the second inclined portion 340, and the rotation axis of the second roller can be arranged parallel to the rotation axis of the first roller. The circumferential surface of the second roller is used to form a second abutment surface 412.

[0283] It should be noted that during the rotation and closing process of the door 200, as the door 200 rotates from its maximum angle Gmax to the closed state, the relative position of the abutment portion 410 can be set to the position of its bottom. For example, when the door 200 is in the closed state (i.e., φ = 0°), the bottom of the abutment portion 410 abuts against the surface of the fixed member 300 facing the movable member 400; when the door 200 is at the first set angle, the bottom of the abutment portion 410 abuts against the first end of the first inclined portion 330, and the first abutment surface 4... 11 is attached to the inclined surface of the first inclined portion 330; when the door body 200 is at the second set angle, the bottom of the abutting portion 410 abuts against the arc surface (i.e., the second end of the first inclined portion 330 and the first end of the second inclined portion 340), the first abutting surface 411 disengages from the first inclined portion 330, and the second abutting surface 412 disengages from the second inclined portion 340; when the door body 200 is at the third set angle, the bottom of the abutting portion 410 abuts against the second end of the second inclined portion 340, and the second abutting surface 412 is attached to the inclined surface of the second inclined portion 340.

[0284] In some embodiments, as shown in FIG25, the abutment portion 410 may be configured as a columnar abutment portion 410. The first end of the columnar abutment portion 410 is connected to the surface of the movable member 400 facing the fixed member 300. The columnar abutment portion 410 extends in the vertical direction. The second end of the columnar abutment portion 410 forms the bottom of the abutment portion 410. The second end of the columnar abutment portion 410 is used to abut against the surface of the fixed member 300 facing the movable member 400, the first abutment portion 410 and the second abutment portion 410, so that the movable member 400 drives the door body 200 to move in the vertical direction through the columnar abutment portion 410.

[0285] For example, the door body 200 can be reused to form the movable part 400, that is, the column-shaped abutment part 410 can be provided at the lower end of the door body 200, and the track groove 420 is provided at the lower end of the door body 200, so as to simplify the structure of the gravity self-closing structure.

[0286] The column-shaped abutment 410 can be integrally formed on the door body 200, or the column-shaped abutment 410 can be detachably formed on the lower end of the door body 200. For example, the first end of the column-shaped abutment 410 can be provided with threads so that the column-shaped abutment 410 can be threadedly connected to the lower end of the door body 200, and the second end of the column-shaped abutment 410 extends downward so that the disassembly and assembly process of the column-shaped abutment 410 is more convenient.

[0287] The column-shaped abutment part 410 can also be fixed to the lower end of the door body 200 by means of snap-fit ​​or other methods. When the column-shaped abutment part 410 is assembled to form a gravity self-closing structure, the first end of the column-shaped abutment part 410 can be inserted into the lower end of the door body 200, so that the column-shaped abutment part 410 is connected to the door body 200, thereby making the assembly process of the gravity self-closing structure more convenient.

[0288] During the rotation and closing of the door 200, the second end of the column-shaped abutment 410 can move from the surface of the fixing member 300 to the first end of the first inclined portion 330. The second end of the column-shaped abutment 410 moves along the first end of the first inclined portion 330 to the second end of the first inclined portion 330, and the movable member 400 drives the door 200 to move upward through the column-shaped abutment 410; and the second end of the column-shaped abutment 410 moves from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the arc surface. The second end of the cylindrical abutment 410 moves along the first end of the second inclined portion 340 to the second end of the second inclined portion 340. The movable member 400 drives the door body 200 to move downward through the cylindrical abutment 410, so that the cylindrical abutment 410 can move from the second end of the second inclined portion 340 to the surface of the fixed member 300 facing the movable member 400, so that the cylindrical abutment 410 can move from the side of the first inclined portion 330 away from the second inclined portion 340 to the side of the second inclined portion 340 away from the first inclined portion 330.

[0289] For example, the housing 100 can be reused to form the fastener 300. For instance, the hinge assembly located at the lower end of the door 200 can be reused to form the fastener 300. The hinge assembly can be provided with a hinge plate 350. The surface of the hinge plate 350 facing the movable member 400 is provided with a first hinge shaft 310, a second hinge shaft 320, and a protruding structure. The protruding structure forms a first inclined portion 330 and a second inclined portion 340, so that the fastener 300 is formed through the hinge plate 350, thereby simplifying the structure of the gravity self-closing structure.

[0290] The first hinge shaft 310 and the second hinge shaft 320 can be fixed to the hinge plate 350 by means of threads, etc. The first hinge shaft 310 is provided with a first threaded section and is threaded to the hinge plate 350 through the first threaded section. The second hinge shaft 320 is provided with a second threaded section and is threaded to the hinge plate 350 through the second threaded section, so that the process of connecting the first hinge shaft 310 and the second hinge shaft 320 to the hinge plate 350 is more convenient.

[0291] The protruding structure can be integrally formed on the hinge plate 350, or the protruding structure can be relatively fixed to the hinge plate 350 by snap-fit ​​or plug-in. The surface of the protruding structure facing away from the hinge plate 350 forms the inclined surface of the first inclined part 330 and the inclined surface of the second inclined part 340. The surface of the protruding structure facing the hinge plate 350 can be provided with positioning posts, and the hinge plate 350 is provided with corresponding positioning grooves. The positioning posts are inserted into the positioning grooves to play a certain positioning role in the installation position of the protruding structure, making the installation process of the protruding structure more convenient.

[0292] The lower end of the door 200 is reused to form the movable part 400, and the hinge assembly of the box 100 is reused to form the fixed part 300, so as to make the assembly process of the gravity self-closing structure more convenient.

[0293] In some embodiments, the second end of the cylindrical abutment portion 410 can be configured as an arc-shaped abutment end. The arc-shaped abutment end can be provided with a cylindrical circumferential surface or a hemispherical surface. When the arc-shaped abutment end is provided with a cylindrical circumferential surface, the extension direction of the cylindrical circumferential surface can be perpendicular to the extension direction of the inclined surface of the first inclined portion 330, so that the circular abutment end always abuts against the inclined surface of the first inclined portion 330 or the inclined surface of the second inclined portion 340 through the arc-shaped surface.

[0294] Alternatively, when the circular abutment end is provided with a hemispherical surface, the hemispherical surface protrudes towards the movable member 400, and the center of the hemispherical surface is located in the extending direction of the cylindrical abutment part 410, so that the circular abutment end always abuts against the inclined surface of the first inclined part 330 or the inclined surface of the second inclined part 340 through the arc surface.

[0295] The cylindrical abutment part 410 can abut against the inclined surfaces of the first inclined part 330 and the second inclined part 340 through the circumferential surface of the cylinder, thereby increasing the contact area between the cylindrical abutment part 410 and the inclined surfaces of the first inclined part 330 and the second inclined part 340, making the process of the cylindrical abutment part 410 driving the door body 200 to move in the vertical direction more stable.

[0296] It should be noted that during the process of the door 200 rotating to close, during the process of the door 200 rotating from the maximum angle Gmax to the closed state, the relative position of the column-shaped abutment part 410 can be set as the second end of the column-shaped abutment part 410.

[0297] For example, when the door 200 is in the closed state (i.e., φ = 0°), the second end of the column-shaped abutment portion 410 abuts against the surface of the fixed member 300 facing the movable member 400; when the door 200 is at the first set angle, the second end of the column-shaped abutment portion 410 abuts against the first end of the first inclined portion 330.

[0298] When the door body 200 is at the second set angle, the second end of the column-shaped abutment 410 abuts against the arc surface (i.e., the second end of the first inclined portion 330 and the first end of the second inclined portion 340); when the door body 200 is at the third set angle, the second end of the column-shaped abutment 410 abuts against the second end of the second inclined portion 340.

[0299] In some embodiments, the second end of the column-shaped abutment portion 410 may be provided with a rolling element, which may be a ball or a roller, etc., so as to reduce the friction between the column-shaped abutment portion 410 and the first inclined portion 330, the column-shaped abutment portion 410 and the second inclined portion 340, and make the process of the door body 200 moving in the vertical direction smoother.

[0300] For example, the rolling element can be set as a ball; the cylindrical abutment portion 410 is provided with a third mounting groove, which is located on the end face of the second end of the cylindrical abutment portion 410. A portion of the ball extends out of the third mounting groove, and the portion of the ball extending out of the third mounting groove forms the bottom of the cylindrical abutment portion 410. The portion of the ball extending out of the third mounting groove is used to abut against the inclined surface of the fixing member 300, the inclined surface of the first inclined portion 330, and the inclined surface of the second inclined portion 340 to reduce the friction between the cylindrical abutment portion 410 and the fixing member 300.

[0301] Alternatively, the rolling element can be configured as a roller, the rotation axis of which can be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340, and the bottom end of the circumferential surface of the roller forms the bottom end of the cylindrical abutment portion 410. The circumferential surface of the roller is used to abut against the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340 to reduce the friction between the cylindrical abutment portion 410 and the fixing member 300.

[0302] During the process of the abutting part 410 moving from the second end of the second inclined part 340 to the surface of the fixed part 300 facing the movable part 400 by the rolling member, the abutting part 410 can move quickly on the inclined surface of the second inclined part 340 under the action of the rolling member, thereby reducing the possibility that the abutting part 410 will stay on the surface of the second inclined part 340.

[0303] In some embodiments, as shown in FIG26, the abutment portion 410 may be configured as a roller abutment portion 410. The roller abutment portion 410 is rotatably disposed on the surface of the movable member 400 facing the fixed member 300, and the peripheral surface of the roller abutment portion 410 is used to abut against the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined surface. The bottom end of the peripheral surface of the roller abutment portion 410 forms the bottom of the abutment portion 410, and the rotation axis of the roller abutment portion 410 may be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340.

[0304] For example, the surface of the movable member 400 facing the fixed member 300 may be provided with a mounting bracket, and the mounting bracket is provided with a mounting hole for the rotation shaft of the roller abutment part 410 to pass through, so that the roller abutment part 410 can rotate relative to the movable member 400 via the rotation shaft and the mounting bracket.

[0305] During the rotation and closing of the door 200, the bottom end of the roller-type abutment part 410 can move from the surface of the fixing member 300 to the first end of the first inclined part 330, and the bottom end of the roller-type abutment part 410 moves along the first end of the first inclined part 330 to the second end of the first inclined part 330. The movable member 400 drives the door 200 to move upward through the roller-type abutment part 410; and the bottom end of the roller-type abutment part 410 moves from the second end of the first inclined part 330 to the first end of the second inclined part 340 through the arc surface. The bottom end of the roller-type abutment portion 410 moves along the first end of the second inclined portion 340 to the second end of the second inclined portion 340. The movable member 400 drives the door body 200 to move downward through the roller-type abutment portion 410, so that the roller-type abutment portion 410 can move from the second end of the second inclined portion 340 to the surface of the fixed member 300 facing the movable member 400, so that the roller-type abutment portion 410 can move from the side of the first inclined portion 330 away from the second inclined portion 340 to the side of the second inclined portion 340 away from the first inclined portion 330.

[0306] Furthermore, as the roller-type abutment portion 410 moves from the second end of the second inclined portion 340 to the surface of the fixed member 300 facing the movable member 400, the roller-type abutment portion 410 can move quickly on the inclined surface of the second inclined portion 340, thereby reducing the possibility that the roller-type abutment portion 410 will remain on the surface of the second inclined portion 340.

[0307] A first arc portion may be provided between the surface of the fixed member 300 facing the movable member 400 and the first inclined portion 330, so that the process of the roller abutment portion 410 moving from the surface of the fixed member 300 to the first inclined portion 330 is more convenient. The curvature of the first arc portion may be less than or equal to the curvature of the roller abutment portion 410, so that the roller abutment portion 410 can move from the surface of the fixed member 300 facing the movable member 400 to the first inclined portion 330 through the first arc portion, thereby making the process of the door body 200 moving upward in the vertical direction smoother.

[0308] An angled portion may be provided between the surface of the fixing member 300 facing the movable member 400 and the second inclined portion 340, or a second arc portion may be provided between the surface of the fixing member 300 facing the movable member 400 and the second inclined portion 340, and the curvature of the second arc portion may be greater than the curvature of the roller-type abutment portion 410. When the roller-type abutment portion 410 can move from the second end of the second inclined portion 340 to the surface of the fixing member 300 facing the movable member 400, the roller-type abutment portion 410 cannot move to the second inclined portion 340 through the angled portion or the second arc portion, thereby increasing the difficulty of the roller-type abutment portion 410 moving to the second inclined portion 340, and further reducing the possibility of a gap being generated between the door body 200 and the box body 100.

[0309] It should be noted that during the rotation and closing process of the door 200, as the door 200 rotates from the maximum angle Gmax to the closed state, the relative position of the roller-type abutment part 410 can be set to the bottom end of the circumferential surface of the roller-type abutment part 410. For example, when the door 200 is in the closed state (i.e., φ=0°), the bottom end of the circumferential surface of the roller-type abutment part 410 abuts against the surface of the fixed member 300 facing the movable member 400; when the door 200 is at the first set angle, the bottom end of the circumferential surface of the roller-type abutment part 410 abuts against the first end of the first inclined part 330; when the door 200 is at the second set angle, the bottom end of the circumferential surface of the roller-type abutment part 410 abuts against the arc surface (i.e., the second end of the first inclined part 330 and the first end of the second inclined part 340); when the door 200 is at the third set angle, the bottom end of the circumferential surface of the roller-type abutment part 410 abuts against the second end of the second inclined part 340.

[0310] It should be noted that the second end of the first inclined portion 330 can be directly connected to the first end of the second inclined portion 340, or the second end of the first inclined portion 330 can be connected to the first end of the second inclined portion 340 through a transition structure, so that the abutting portion 410 can move from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the transition structure. The surface of the transition structure facing the movable member 400 can be flush with the second end of the first inclined portion 330 and the first end of the second inclined portion 340, so that the abutting portion 410 abuts more stably against the surface of the transition structure facing the movable member 400.

[0311] In some embodiments, when the abutment portion 410 forms a first inclined surface and a second inclined surface, the abutment portion 410 is configured as a columnar abutment portion 410, the abutment portion 410 is configured as a roller-type abutment portion 410, or when the abutment portion 410 is configured in other forms, the implementation of the first inclined portion 330 and the second inclined portion 340 is as follows:

[0312] The second end of the first inclined portion 330 can be directly connected to the first end of the second inclined portion 340, or the second end of the first inclined portion 330 can be connected to the first end of the second inclined portion 340 through a transition structure. For example, the transition structure can form an arc surface, which protrudes towards the movable member 400. The first end of the arc surface is connected to the second end of the first inclined portion 330, and the second end of the arc surface is connected to the first end of the second inclined portion 340, so that the second end of the first inclined portion 330 can be connected to the first end of the second inclined portion 340 through the arc surface, thereby making the process of the abutment portion 410 moving from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 smoother.

[0313] For example, the transition structure can be integrally disposed on the first inclined portion 330 and the second inclined portion 340. For instance, the first inclined portion 330, the transition structure and the second inclined portion 340 are connected in sequence to form a protruding structure.

[0314] The transition structure may also have a transition plane, which is flush with the second end of the first inclined portion 330 and the first end of the second inclined portion 340. The first end of the transition plane is connected to the second end of the first inclined portion 330, and the second end of the transition plane is connected to the first end of the second inclined portion 340, so that the abutting portion 410 moves from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the transition plane.

[0315] In some embodiments, the transition structure may include a support body and a transition member disposed at the top of the support body. At least a portion of the transition member extends out of the support body toward the movable member 400. The transition member may be configured as a ball or a roller, etc. The transition member is disposed between the second end of the first inclined portion 330 and the first end of the second inclined portion 340. The top end of the transition member may be disposed flush with the second end of the first inclined portion 330 and the first end of the second inclined portion 340, so that the abutment portion 410 moves from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the transition member.

[0316] For example, the transition member can be configured as a ball bearing, which is embedded at the top of the support body and extends at least partially out of the support body. The portion of the ball bearing extending out of the support body can be used to abut against the abutment portion 410 so that the abutment portion 410 can move from the first end of the first inclined portion 330 to the first end of the second inclined portion 340 via the ball bearing.

[0317] The transition member can also be configured as a roller, the rotation axis of which can be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340, and the top end of the circumferential surface of the roller is used to abut the abutting portion 410 so that the abutting portion 410 can move from the first end of the first inclined portion 330 to the first end of the second inclined portion 340 via the roller.

[0318] The number of transition pieces can be set to one or more. When the number of transition pieces is set to multiple, multiple transition pieces can form at least one transition piece row. The first end of the transition piece row is connected to the second end of the first inclined part 330, and the second end of the transition piece row is connected to the first end of the second inclined part 340. Each transition piece row includes several transition pieces, and the number of transition piece rows can be set to multiple. The arrangement direction of the multiple transition piece rows is perpendicular to the row direction of the transition piece rows.

[0319] For example, the number of transition pieces is set to multiple, and the multiple transition pieces form several rows of transition pieces. In the several rows of transition pieces, each row of transition pieces may include balls, or each row of transition pieces may include rollers; or, in the several rows of transition pieces, at least one row of transition pieces includes balls, and at least one row of transition pieces includes rollers.

[0320] In some embodiments, the transition structure may include a support body and a transition member disposed at the top of the support body. The number of transition members is set to one, and the transition member may be configured as a ball or a roller, etc. At least a portion of the transition member extends out of the support body. The portion of the transition member extending out of the support body can be used to abut against the abutment portion 410, and the top of the transition member is higher than the second end of the first inclined portion 330 and the first end of the second inclined portion 340. At least a portion of the transition member is reused to form the inclined surface of the first inclined portion 330, and at least a portion of the transition member is reused to form the inclined surface of the second inclined portion 340.

[0321] For example, when the abutting part 410 moves from the second end of the first inclined part 330 to the first end of the second inclined part 340 through the transition member, the abutting part 410 continues to move upward from the second end of the first inclined part 330 through the surface of the transition member to the top of the transition member, and then moves downward from the top of the transition member through the surface of the transition member to the first end of the second inclined part 340.

[0322] The transition element can be configured as a ball bearing, which is embedded at the top of the support body and extends at least partially out of the support body. The portion of the ball bearing extending out of the support body can be used to abut against the abutment portion 410, so that the abutment portion 410 can move from the first end of the first inclined portion 330 to the first end of the second inclined portion 340 via the ball bearing.

[0323] The transition member can also be configured as a roller, the rotation axis of which can be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340, and the top end of the circumferential surface of the roller is used to abut the abutting portion 410 so that the abutting portion 410 can move from the first end of the first inclined portion 330 to the first end of the second inclined portion 340 via the roller.

[0324] In some embodiments, the first surface of the protruding structure faces the first hinge axis 310 and the second hinge axis 320, and the second surface of the protruding structure faces away from the first hinge axis 310 and the second hinge axis 320. The first surface of the protruding structure forms the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340 connected to each other. The second surface of the abutting portion 410 forms the first abutting surface 411 and the second abutting surface 412 connected to each other. When the movable member 400 rotates relative to the fixed member 300 through the first hinge axis 310 and the second hinge axis 320, the abutting portion 410 is disposed on the first surface of the protruding structure.

[0325] For example, the transition structure has an arc surface located on the first surface of the protruding structure, the arc surface facing the first hinge axis 310 and the second hinge axis 320, and the arc surface of the transition structure connects the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340. The arc surface can be set as a cylindrical arc surface, and the central axis of the cylindrical arc surface is inclined.

[0326] Alternatively, the transition structure may include a support body and a transition member disposed at the top of the support body. At least a portion of the transition member extends out of the support body toward the movable member 400. The transition member may be configured as a ball or a roller, etc. The transition member is disposed between the second end of the first inclined portion 330 and the first end of the second inclined portion 340. The top end of the transition member may be disposed flush with the second end of the first inclined portion 330 and the first end of the second inclined portion 340, so that the abutment portion 410 moves from the second end of the first inclined portion 330 to the first end of the second inclined portion 340 through the transition member.

[0327] The transition piece can be set as a roller. The rotation axis of the roller can be parallel to the inclined surface of the first inclined portion 330 and the inclined surface of the second inclined portion 340. The rotation axis of the roller is inclined and forms the central axis of a cylindrical arc surface. The circumferential surface of the roller extending out of the support body is used to abut the abutting portion 410. The circumferential surface of the roller extending out of the support body forms a cylindrical arc surface so that the abutting portion 410 can move from the first end of the first inclined portion 330 to the first end of the second inclined portion 340 through the roller.

[0328] In some embodiments, at least one of the first inclined portion 330 and the second inclined portion 340 may be provided with a movable member, which may be a ball or a roller, etc., to reduce the friction between the abutment portion 410 and the first inclined portion 330, the abutment portion 410 and the second inclined portion 340, so that the process of the door body 200 moving in the vertical direction is smoother.

[0329] For example, the number of moving parts can be set to one or more. When the number of moving parts is set to one, the contact can be provided on the first inclined portion 330 or the second inclined portion 340; or, the number of moving parts can be set to multiple, and the multiple moving parts can be used to form at least one of the inclined surfaces of the first inclined portion 330 and the second inclined portion 340.

[0330] When the number of movable members on the first inclined portion 330 is set to multiple, the multiple movable members can be arranged in a direction parallel to the inclined surface of the first inclined portion 330, and the multiple movable members can be reused to form the inclined surface of the first inclined portion 330, so as to reduce the friction between the abutment portion 410 and the first inclined portion 330 when the door body 200 moves upward.

[0331] When the number of movable members on the second inclined portion 340 is set to multiple, the multiple movable members can be arranged in a direction parallel to the inclined surface of the second inclined portion 340, and the multiple movable members can be reused to form the inclined surface of the second inclined portion 340, so as to reduce the friction between the abutment portion 410 and the second inclined portion 340 when the door body 200 moves downward.

[0332] In the first inclined portion 330 and / or the second inclined portion 340, when the number of moving parts is set to multiple, the multiple moving parts can form at least one moving part row, each moving part row includes several moving parts, and the number of moving part rows can be set to multiple, with the arrangement direction of the multiple moving part rows perpendicular to the row direction of the transition part row.

[0333] For example, in the first inclined portion 330 and / or the second inclined portion 340, the number of transition members is set to multiple, and the multiple moving members form several moving member rows. In the several moving member rows, each moving member row may include balls, or each moving member row may include rollers; or, in the several moving member rows, at least one moving member row includes balls, and at least one moving member row includes rollers.

[0334] In some embodiments, the surface of the fixing member 300 facing the movable member 400 may also include a guide structure. The guide structure may be correspondingly disposed on the moving path of the abutment part 410 relative to the fixing member 300, so as to guide the moving process of the abutment part 410 and reduce the possibility of the abutment part 410 deviating during the moving process.

[0335] For example, the guide structure can be configured as a groove-type guide structure, which may include a first part and a second part spaced apart. The first part of the groove-type guide structure is disposed on the side of the first inclined portion 330 away from the second inclined portion 340, and the second part of the groove-type guide structure is disposed on the side of the second inclined portion 340 away from the first inclined portion 330, so that during the rotation and closing of the door 200, the abutment portion 410 can pass through the first part of the groove-type guide structure, the first inclined portion 330, the second inclined portion 340 and the second part of the groove-type guide structure in sequence.

[0336] The shape of the groove-type guide structure can be adjusted according to the bottom shape of the abutment part 410. For example, when the abutment part 410 is set as a columnar abutment part 410 and the bottom of the columnar abutment part 410 is arc-shaped, the cross-sectional shape of the groove-type guide structure can be set to arc-shaped accordingly. When the bottom of the columnar abutment part 410 is cylindrical, the cross-sectional shape of the groove-type guide structure can be set to square accordingly, so that the groove-type guide structure can play a certain guiding role for the columnar abutment part 410.

[0337] Alternatively, the grooved guide structure can also be used to abut against the abutment portion 410 having a first abutment surface 411 and abutment surface 412, and the grooved guide structure can play a certain guiding role on the bottom of the abutment portion 410 having a first abutment surface 411 and abutment surface 412.

[0338] The grooved guide structure can also be provided with rollers or balls. The number of rollers and balls can be set to multiple, and the multiple rollers or balls can be arranged along the extension direction of the grooved guide structure so that the bottom of the abutment part 410 can roll and contact the grooved guide structure through the multiple rollers or balls, thereby reducing the friction between the abutment part 410 and the grooved guide structure.

[0339] For example, the guide structure can also be configured as a raised guide structure, which may include a first part and a second part spaced apart. The first part of the raised guide structure is disposed on the side of the first inclined portion 330 away from the second inclined portion 340, and the second part of the raised guide structure is disposed on the side of the second inclined portion 340 away from the first inclined portion 330, so that during the rotation and closing of the door 200, the abutment portion 410 can pass through the first part of the raised guide structure, the first inclined portion 330, the second inclined portion 340 and the second part of the raised guide structure in sequence.

[0340] The raised guide structure includes two cooperating guide bars, which are spaced apart, and the gap between the two guide bars is used for the abutment portion 410; the surface of the fixing member 300 facing the movable member 400 and the surfaces of the two guide bars facing each other form a guide groove, wherein the surface of the fixing member 300 facing the movable member 400 forms the bottom surface of the guide groove, and the surfaces of the two guide bars facing each other form the sidewall surface of the guide groove.

[0341] The shape of the guide groove can be adjusted according to the bottom shape of the abutment part 410. For example, when the abutment part 410 is set as a cylindrical abutment part 410 and the bottom of the cylindrical abutment part 410 is arc-shaped, the cross-sectional shape of the guide groove can be set to arc-shaped accordingly. When the bottom of the cylindrical abutment part 410 is cylindrical, the cross-sectional shape of the guide groove can be set to square accordingly, so as to guide the cylindrical abutment part 410 to a certain extent through the guide groove.

[0342] Alternatively, the guide groove can also be used to abut against the abutment portion 410 having a first abutment surface 411 and abutment surface 412, and the guide groove can play a certain guiding role on the bottom of the abutment portion 410 having a first abutment surface 411 and abutment surface 412.

[0343] The bottom surface of the guide groove can also be provided with rollers or balls. The number of rollers and balls can be set to multiple, and multiple rollers or balls can be arranged along the extension direction of the guide groove so that the bottom of the abutment part 410 can roll and contact the guide groove through multiple rollers or balls, thereby reducing the friction between the abutment part 410 and the guide groove.

[0344] For example, the guide structure can also be configured as a concealed guide structure. The surface of the fixed member 300 facing the movable member 400 is provided with a moving groove. A first inclined portion 330 and a second inclined portion 340 can be provided in the moving groove. The first inclined portion 330 and the second inclined portion 340 separate the moving groove into a first part and a second part that are provided at intervals. The first part of the moving groove is provided on the side of the first inclined portion 330 away from the second inclined portion 340, and the second part of the moving groove is provided on the side of the second inclined portion 340 away from the first inclined portion 330. The first part of the moving groove forms the first part of the concealed guide structure, and the second part of the moving groove forms the second part of the concealed guide structure.

[0345] The second end of the first inclined portion 330 and the first end of the second inclined portion 340 may be flush with the surface of the fixed member 300 facing the movable member 400, or the second end of the first inclined portion 330 and the first end of the second inclined portion 340 may protrude from the surface of the fixed member 300 facing the movable member 400.

[0346] The shape of the movable groove can be adjusted according to the bottom shape of the abutment part 410. For example, when the abutment part 410 is set as a cylindrical abutment part 410 and the bottom of the cylindrical abutment part 410 is arc-shaped, the cross-sectional shape of the movable groove can be set to arc-shaped accordingly. When the bottom of the cylindrical abutment part 410 is cylindrical, the cross-sectional shape of the movable groove can be set to square accordingly, so as to guide the cylindrical abutment part 410 to a certain extent through the movable groove.

[0347] Alternatively, the movable groove can also be used to abut against the abutment portion 410 having a first abutment surface 411 and abutment surface 412, and the movable groove can play a certain guiding role for the bottom of the abutment portion 410 having a first abutment surface 411 and abutment surface 412.

[0348] The bottom surface of the moving groove can also be provided with rollers or balls. The number of rollers and balls can be set to multiple, and multiple rollers or balls can be arranged along the extension direction of the moving groove so that the bottom of the abutment part 410 can roll and contact the moving groove through multiple rollers or balls, thereby reducing the friction between the abutment part 410 and the moving groove.

[0349] In some embodiments, along the extending directions of the first hinge axis 310 and the second hinge axis 320, the projected areas of the first inclined portion 330 and the second inclined portion 340 on the surface of the fixed member 300 toward the movable member 400 can be adjusted according to the magnitude of the first set angle, the second set angle and the third set angle.

[0350] For example, when the opening angle φ of the door 200 is 25 degrees, the opening angle of the door 200 is set to the first set angle; when the opening angle φ of the door 200 is 15 degrees, the opening angle of the door 200 is set to the second set angle; and when the opening angle φ of the door 200 is 5 degrees, the opening angle of the door 200 is set to the third set angle.

[0351] At this time, on the surface of the fixed member 300 facing the movable member 400, the central angle between the first end of the first inclined part 330 and the second end of the second inclined part 340 is set to 20 degrees, that is, when the abutting part 410 moves between the first end of the first inclined part 330 and the second end of the second inclined part 340, the rotation angle of the door body 200 is 20 degrees.

[0352] For example, when the opening angle φ of the door 200 is 45 degrees, the opening angle of the door 200 is set to the first set angle; when the opening angle φ of the door 200 is 15 degrees, the opening angle of the door 200 is set to the second set angle; and when the opening angle φ of the door 200 is 8 degrees, the opening angle of the door 200 is set to the third set angle.

[0353] At this time, on the surface of the fixed member 300 facing the movable member 400, the central angle between the first end of the first inclined part 330 and the second end of the second inclined part 340 is set to 37 degrees, that is, when the abutting part 410 moves between the first end of the first inclined part 330 and the second end of the second inclined part 340, the rotation angle of the door body 200 is 37 degrees.

[0354] It should be noted that the central angle between the first end of the first inclined portion 330 and the second end of the second inclined portion 340 on the surface of the fixed member 300 facing the movable member 400 can be set to be greater than or equal to 10 degrees and less than or equal to 45 degrees. For example, the central angle between the first end of the first inclined portion 330 and the second end of the second inclined portion 340 can be set within one of the following angle ranges: 10-15 degrees, 15-20 degrees, 20-25 degrees, 25-30 degrees, 30-35 degrees, 35-40 degrees, and 40-45 degrees.

[0355] In some embodiments, the fastener 300 can be relatively fixedly disposed on the housing 100. For example, the fastener 300 can be directly connected to the housing 100, or the fastener 300 can also be connected to the housing 100 through a hinge assembly located at the lower end of the door 200. The materials of the fastener 300 and the movable part 400 can be set as POM material.

[0356] For example, the fastener 300 can be configured as a plate fastener 300 or a column fastener 300, etc. The first surface of the fastener 300 can face the housing 100, or the fastener 300 can also face the hinge plate 350 of the hinge assembly. The second surface of the fastener 300 faces the lower end of the door 200, and the second surface of the fastener 300 is connected to the first hinge shaft 310 and the second hinge shaft 320.

[0357] As shown in Figure 27, the fastener 300 may be provided with at least one connector 360 so that the fastener 300 is relatively fixed to the housing 100 through the connector 360. For example, the fastener 300 can be fixed to the hinge plate 350 of the hinge assembly through the connector 360.

[0358] The connector 360 can be configured as a connecting post, which can be fixedly mounted on the hinge plate 350. The first end of the connecting post is connected to the hinge plate 350, and the second end of the connecting post extends toward the movable member 400. The fixing member 300 is provided with a movable opening, and the connecting post passes through the movable opening so that the fixing member 300 can be relatively movable on the hinge plate 350 along the extension direction of the connecting post, thereby enabling the fixing member 300 and the hinge plate 350 to be fixed through the connecting post.

[0359] The connector 360 can also be configured as a fixing bolt, fixing pin or other structure, or the connector 360 can also be configured as a snap-fit ​​connector or other structure, so that the fastener 300 can be detachably connected to the hinge plate 350 by snap-fit ​​or other means.

[0360] The number of connectors 360 can be set to one or more. When the number of connectors 360 is set to multiple, the multiple connectors 360 can be evenly distributed on the fixing member 300, and the extension directions of the multiple connectors 360 are arranged parallel to each other, so that the process of the fixing member 300 moving along the extension direction of the connectors 360 is more stable.

[0361] For example, the first hinge shaft 310 and the second hinge shaft 320 may also be disposed on the hinge plate 350. The extension direction of the first hinge shaft 310 and the extension direction of the second hinge shaft 320 are both parallel to the extension direction of the connector 360. The fixing member 300 may be provided with two through holes, which are respectively used to pass through the first hinge shaft 310 and the second hinge shaft 320, so that the ends of the first hinge shaft 310 and the second hinge shaft 320 away from the hinge plate 350 can pass through the fixing member 300 and extend toward the movable member 400. The fixing member 300 can move along the extension direction of the first connector 360 through the two through holes.

[0362] When the fastener 300 is fixed relative to the housing 100, the fastener 300 can be moved in a direction close to the hinge plate 350, so that the connecting post passes through the movable opening, and the first hinge shaft 310 and the second hinge shaft 320 fixed relative to the hinge plate 350 can pass through the through hole. The first surface of the fastener 300 faces the hinge plate 350, thereby fixing the fastener 300 relative to the housing 100.

[0363] For example, as shown in Figure 27, the fastener 300 may also be provided with a connector 360. The first end of the connector 360 may be connected to the fastener 300, and the second end of the connector 360 may be connected to the hinge plate 350. The second end of the connector 360 may be extended and retracted along the extension direction of the connecting post so as to adjust the distance between the fastener 300 and the hinge plate 350 through the connector 360.

[0364] The movable part 400 is relatively fixed to the door body 200. When the distance between the fixed part 300 and the hinge plate 350 is adjusted by the connector 360, the distance between the movable part 400 and the fixed part 300 remains relatively fixed, allowing the distance between the movable part 400 and the door body 200 and the hinge plate 350 to change. When it is necessary to adjust the height of the door body 200, the height of the door body 200 can be adjusted by adjusting the distance between the fixed part 300 and the hinge plate 350 through the connector 360.

[0365] As shown in Figures 28 and 29, the fastener 300 may be provided with an adjusting plate 370. The first surface of the adjusting plate 370 is connected to the hinge plate 350, and the second surface of the adjusting plate 370 is connected to the fastener 300, so that the fastener 300 is connected to the adjusting plate 370 through the connector 360. The material of the adjusting plate 370 may be a metal material.

[0366] When the height of the fastener 300 needs to be adjusted, the height of the adjusting plate 370 can be changed through the connecting piece 360. The adjusting plate 370 can then drive the fastener 300 to move up and down in the vertical direction. This reduces the possibility of the connecting piece 360 ​​directly contacting the fastener 300, thus reducing the possibility of the fastener 300 being damaged by collision.

[0367] The adjusting plate 370 may also be provided with at least one connecting part 371 for connecting the fixing member 300. The number of connecting parts 371 may be one or more. The connecting parts 371 protrude toward the fixing member 300 and are recessed away from the surface of the fixing member 300, so as to increase the support strength of the adjusting plate, increase the stability of the adjusting plate, and reduce the possibility of deformation of the adjusting plate.

[0368] The connector 360 can be configured as an adjusting bolt. The first end of the adjusting bolt is rotatably connected to the fixing member 300, and the adjusting bolt is threadedly connected to the hinge plate 350. The second end of the adjusting bolt protrudes from the surface of the fixing member 300 relative to the hinge plate 350. When it is necessary to adjust the distance between the fixing member 300 and the hinge plate 350, the adjusting bolt can be rotated to screw the threaded section of the adjusting bolt into or out of the hinge plate 350, thereby changing the length of the adjusting bolt located between the fixing member 300 and the hinge plate 350. This allows for the adjustment of the distance between the fixing member 300 and the hinge plate 350, and also enables the adjustment of the height of the refrigerator door 200, reducing the possibility of unevenness in the refrigerator door 200.

[0369] Furthermore, the connecting part 371 can be reused to connect the adjusting nut. The connecting part 371 can correspond to the center of gravity of the fixed plate. The surface of the connecting part 371 facing away from the fixed member 300 can be reused to connect the adjusting bolt. The connecting part 371 can play a certain positioning role for the adjusting bolt, so that the process of the adjusting bolt driving the fixed member 300 to move up and down in the vertical direction through the adjusting plate 370 is more stable.

[0370] Alternatively, in some embodiments, the adjusting plate 370 can be replaced by an adjusting nut, which can be threaded to the connecting post (e.g., the connecting member 360 is the connecting post), and the adjusting nut abuts against the fixing member 300 on the surface away from the hinge plate 350. When it is necessary to adjust the distance between the fixing member 300 and the hinge plate 350, the adjusting nut can be rotated to move the adjusting nut along the extension direction of the connecting post, thereby changing the length of the connecting post located between the fixing member 300 and the hinge plate 350, so as to realize the adjustment process of the distance between the fixing member 300 and the hinge plate 350.

[0371] In some embodiments, for example, the connector 360 can also be reused to form a structure including an adjusting nut and an adjusting bolt. For example, the adjusting nut can be rotatably disposed on the hinge plate 350 about the extension direction of the connector 360, and the first end of the connector 360 protrudes from the surface of the hinge plate 350 away from the fixing member 300. The threaded rod of the connector 360 is connected to the fixing member 300. When it is necessary to adjust the distance between the fixing member 300 and the hinge plate 350, the adjusting nut of the connector 360 can be rotated to screw the threaded rod of the connector 360 into or out of the fixing member 300, thereby changing the length of the connector 360 located between the fixing member 300 and the hinge plate 350, so as to realize the adjustment process of the distance between the fixing member 300 and the hinge plate 350.

[0372] Alternatively, the adjusting nut of the connector 360 can be rotatably mounted on the fixing member 300 about the extension direction of the connector 360, and the first end of the connector 360 protrudes from the surface of the hinge plate 350 relative to the fixing member 300. The connector 360 is threadedly connected to the hinge plate 350. When it is necessary to adjust the distance between the fixing member 300 and the hinge plate 350, the adjusting nut of the connector 360 can be rotated to make the threaded rod of the connector 360 screw into or out of the hinge plate 350, thereby changing the length of the connector 360 located between the fixing member 300 and the hinge plate 350, so as to realize the adjustment process of the distance between the fixing member 300 and the hinge plate 350.

[0373] The first hinge axis 310 and the second hinge axis 320 can be disposed on the hinge plate 350, and the first hinge axis 310 and the second hinge axis 320 pass through the adjusting plate and the fixing member 300, such that at least a portion of the first hinge axis 310 and the second hinge axis 320 extends toward the moving member 400, and the length of the first hinge axis 310 and the second hinge axis 320 can be greater than or equal to 8 mm and less than or equal to 18 mm. For example, the length of the first hinge axis 310 and the second hinge axis 320 can be set to any length range of 8 mm-10 mm, 10 mm-12 mm, 12 mm-14 mm, 14 mm-16 mm, and 16 mm-18 mm.

[0374] Furthermore, the height adjustment range of the connector 360 adjusting fastener 300 can be set to be greater than or equal to 0.5 mm and less than or equal to 3.5 mm. For example, the height adjustment range of the connector adjusting fastener 300 can be set to any one of the following: 0.5 mm-1 mm, 1 mm-1.5 mm, 1.5 mm-2 mm, 2 mm-2.5 mm, 2.5 mm-3 mm, and 3 mm-3.5 mm.

[0375] The lengths of the first hinge shaft 310 and the second hinge shaft 320 affect the adjustment range of the height of the connecting member 360 adjusting the fixing member 300. For example, when the lengths of the first hinge shaft 310 and the second hinge shaft 320 are larger, and the lengths of the first hinge shaft 310 and the second hinge shaft 320 extending out of the fixing member 300 remain unchanged, the adjustment range of the height of the connecting member 360 adjusting the fixing member 300 is larger.

[0376] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0377] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A refrigerator, comprising: Box; The door is rotatably mounted on the housing; The gravity-operated self-closing structure includes a fixing component and a movable component that cooperate with each other. The fixing component is disposed in the housing, and the movable component is fixedly disposed in the door. The movable component is provided with a track groove; the fixed component is provided with a first hinge shaft and a second hinge shaft that can move within the track groove; The surface of the fixing member facing the movable member is further provided with a first inclined portion and a second inclined portion. The first end of the first inclined portion is connected to the fixing member, the first inclined portion is inclined upward, the first end of the first inclined portion is the bottom end of the first inclined portion, and the first end of the first inclined portion is the top end of the first inclined portion. The first end of the second inclined portion is connected to the second end of the first inclined portion, the second inclined portion is inclined downward, the first end of the second inclined portion is the top end of the second inclined portion, and the second end of the second inclined portion is the bottom end of the second inclined portion. The movable part is provided with an abutting part, which is used to abut against the first inclined part and the second inclined part; During the process of the door rotating and closing, the abutting part abuts against the first inclined part and the second inclined part in sequence; the first hinge shaft and the second hinge shaft move from the second end of the track groove toward the first end of the track groove, and the door body generates an upward and then downward displacement in the vertical direction.

2. The refrigerator according to claim 1, wherein, The first inclined portion and the second inclined portion are located on the path of the door body rotation, and the abutting portion abuts against the first inclined portion and the second inclined portion within the preset angle range of the door body rotation. 3.The refrigerator according to claim 1, wherein, The trajectory slot includes a first slot segment, a second slot segment, and a third slot segment connected in sequence; the curvature of the first slot segment is less than the curvature of the second slot segment, and the curvature of the second slot segment is greater than the curvature of the third slot segment.

4. The refrigerator of claim 3, wherein, The trajectory groove has a first inflection point and a second inflection point set at intervals. The first inflection point is closer to the second end of the trajectory groove relative to the second inflection point. The first inflection point separates the first groove segment and the second groove segment, and the second inflection point separates the second groove segment and the third groove segment.

5. The refrigerator of claim 4, wherein, The first end of the track groove is close to the front wall of the door body relative to the first inflection point, and the first end of the first groove segment is far away from the side wall of the door body relative to the first inflection point. The first inflection point is closer to the rear wall of the door body relative to the second inflection point, and the first inflection point is farther away from the side wall of the door body relative to the second inflection point; The second inflection point is away from the front wall of the door body relative to the second end of the track groove, and the second inflection point is close to the side wall of the door body relative to the second end of the track groove. 6.The refrigerator of claim 1, wherein, The first hinge axis and the second hinge axis are spaced apart; The first hinge shaft and the second hinge shaft are movably disposed within the track groove, with the first hinge shaft being closer to the second end of the track groove than the second hinge shaft.

7. The refrigerator according to any one of claims 1-6, wherein, The abutting portion has a first abutting surface and a second abutting surface connected to each other, and the first abutting surface and the second abutting surface are in contact with different positions of the first inclined portion and the second inclined portion when the door body is opened at different angles within a preset angle range of rotation of the door body.

8. The refrigerator of claim 7, wherein, The opening angle of the door body is set to have a first set angle, a second set angle and a third set angle in sequence, the preset angle is the first set angle, the abutting portion abuts the first end of the first inclined portion when the opening angle of the door body is set to the first set angle, the abutting portion abuts the second end of the first inclined portion when the opening angle of the door body is set to the second set angle, and the abutting portion abuts the second end of the second inclined portion when the opening angle of the door body is set to the third set angle. 9.The refrigerator of claim 8, wherein, The first abutting surface and the second abutting surface are inclined surfaces, the first abutting surface is fitted to the first inclined portion when the bottom of the abutting portion is connected to the first end of the first inclined portion, and the area of the first abutting surface fitted to the first inclined portion gradually decreases when the abutting portion moves from the first end of the first inclined portion to the second end of the first inclined portion. The area of the second abutting surface fitted to the second inclined portion gradually increases when the bottom of the abutting portion moves to the first end of the second inclined portion and moves from the first end of the second inclined portion to the second end of the second inclined portion, and the area of the second abutting surface fitted to the second inclined portion is the largest when the abutting portion moves to the second end of the second inclined portion. 10.The refrigerator of claim 7, wherein, The first abutting surface is arranged in parallel to the first inclined portion, and the second abutting surface is arranged in parallel to the second inclined portion. During the process of rotating the door body to be closed, the first abutting surface abuts the first inclined portion when the abutting portion moves from the first end of the first inclined portion to the second end of the first inclined portion, and the door body moves upward in the vertical direction through the movable element. The second abutting surface abuts the second inclined portion when the abutting portion moves from the first end of the second inclined portion to the second end of the second inclined portion, and the door body moves downward in the vertical direction. 11.The refrigerator of claim 7, wherein, The height of the first inclined portion is equal to the height of the second inclined portion, and the second end of the first inclined portion is arranged in flush with the first end of the second inclined portion. The first abutting surface is fitted to the first inclined portion when the abutting portion is located at the first end of the first inclined portion, and the second abutting surface is fitted to the second inclined portion when the abutting portion is located at the second end of the second inclined portion.

12. The refrigerator according to any one of claims 7-11, wherein, The inclination angle of the first inclined portion is equal to the inclination angle of the second inclined portion, and the inclination angle of the first abutting surface is equal to the inclination angle of the second abutting surface.

13. The refrigerator according to any one of claims 7-11, wherein, The inclination angle of the first inclined portion is smaller than the inclination angle of the second inclined portion, and the inclination angle of the first abutting surface is smaller than the inclination angle of the second abutting surface.

14. The refrigerator according to any one of claims 1-13, wherein, The first inclined part and the second inclined part are integrally formed with a convex structure on the surface of the fixing member, and a top surface of the convex structure is an inclined surface in contact with the abutting part. 15.The refrigerator according to claim 14, wherein, A first surface of the convex structure faces the first hinge shaft and the second hinge shaft, and a second surface of the convex structure faces away from the first hinge shaft and the second hinge shaft; the inclined surface connects the first surface and the second surface; the inclined surface of the first inclined part and the inclined surface of the second inclined part both face the vertical direction. 16.The refrigerator according to claim 14, wherein, The inclined surface is an arc surface. 17.The refrigerator according to claim 14, wherein, The inclined surface of the first inclined part and the arc surface of the second inclined part are connected into a continuous arc surface. 18.The refrigerator of claim 14, wherein, An extension direction of the convex structure is the same as a path direction of the door body opening.

19. The refrigerator according to any one of claims 1-18, wherein, The door body further comprises a door back wall and a door seal strip, the door back wall is a side wall of the door body close to the cabinet; The door seal strip is arranged on the door back wall; when the door body is in the closed state, the door seal strip is in abutment with the cabinet to block the gap between the door body and the cabinet; when the abutting part is in abutment with the second inclined part, the side of the door seal strip away from the door back wall is in contact with the cabinet. 20.The refrigerator of claim 1, wherein, The abutting part is arranged as a column type abutting part or a roller type abutting part.

21. The refrigerator of claim 1, wherein, The gravity self-closing structure is arranged at the lower end of the door body.

22. The refrigerator of claim 1, wherein, The first hinge shaft and the second hinge shaft are in contact with the track groove to form a first contact point and a second contact point, respectively, and the abutting part and one of the first inclined part and the second inclined part form a third contact point, and the first contact point, the second contact point and the third contact point are not collinear.

23. A refrigerator, wherein, A cabinet, a door body and a gravity self-closing structure are included. The door body is used to close or open the containing cavity of the cabinet; the gravity self-closing structure is arranged at the lower end of the door body, and the gravity self-closing structure comprises a fixing member and a movable member, the fixing member is arranged on the cabinet, and the movable member is arranged on the door body. The movable member is provided with a track groove; the fixing member is provided with a first hinge shaft and a second hinge shaft which can move in the track groove; A surface of the fixing member facing the movable member is provided with a first inclined part and a second inclined part, a first end of the first inclined part is connected to the fixing member, the first inclined part is inclined upward, the first end of the first inclined part is the bottom end of the first inclined part, and the first end of the first inclined part is the top end of the first inclined part; a first end of the second inclined part is connected to a second end of the first inclined part, the second inclined part is inclined downward, the first end of the second inclined part is the top end of the second inclined part, and the second end of the second inclined part is the bottom end of the second inclined part; The movable member is provided with an abutting part for abutting the first inclined part and the second inclined part; During the rotation of the door body to the closed state, the first hinge shaft and the second hinge shaft move in the track groove along the extension direction of the track groove, and the abutting part moves from the first inclined part to the second inclined part.

24. A refrigerator comprising: a cabinet; a door body rotatably arranged on the cabinet; The gravity self-closing structure comprises a fixed part and a movable part, the fixed part is arranged on the cabinet, and the movable part is fixedly arranged on the door body; The movable part is provided with a track groove, and the fixed part is provided with a hinge shaft capable of moving in the track groove; The surface of the fixed part towards the movable part is further provided with a convex structure, the convex structure has an uphill section and a downhill section; The movable part is provided with an abutting portion for abutting the uphill section and the downhill section; During the rotation of the door body, the abutting portion abuts the uphill section and the downhill section in sequence.

25. The refrigerator of claim 24, wherein, The uphill section and the downhill section correspond to a first inclined part and a second inclined part respectively, the first end of the first inclined part is connected with the fixed part, the first inclined part is inclined upward, the first end of the first inclined part is the bottom end of the first inclined part, and the second end of the first inclined part is the top end of the first inclined part; the first end of the second inclined part is connected with the second end of the first inclined part, and the second inclined part is inclined downward; the first end of the second inclined part is the top end of the second inclined part, and the second end of the second inclined part is the bottom end of the second inclined part. 26.The refrigerator of claim 24, wherein, The hinge shaft comprises a first hinge shaft and a second hinge shaft, the first hinge shaft and the second hinge shaft are arranged at intervals, and the first hinge shaft and the second hinge shaft move in the same track groove when the door body rotates. 27.The refrigerator of claim 24, wherein, The hinge shaft is one. 28.The refrigerator of claim 24, wherein, The abutting portion is a protruding portion protruding from the surface of the movable part, the protruding portion has a contact surface for contacting the convex structure on the fixed part, and the protruding portion moves along the convex structure when the door body rotates. 29.The refrigerator of claim 24, wherein, The fixed part is arranged on the hinge plate at the bottom of the cabinet. 30.The refrigerator of claim 24, wherein, The fixed part is a hinge plate.

31. The refrigerator of claim 24, wherein, The gravity self-closing structure is arranged at the lower end of the door body.

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