Hinge components and opening and closing devices

Abstract

The present application relates to the technical field of household appliances, and discloses a hinge assembly and an opening and closing device. The hinge assembly includes a first mating piece and a second mating piece that are rotatably connected. One end of the first mating piece is provided with a first curved surface and a second curved surface, and one end of the second mating piece is provided with a third curved surface and a fourth curved surface. The first mating piece and the second mating piece have a first posture and a second posture. The first mating piece and the second mating piece can rotate relative to each other around a first axis to switch between the first posture and the second posture. In the first posture, the first curved surface abuts against the third curved surface, and in the second posture, the second curved surface abuts against the fourth curved surface. The hinge assembly can use different postures to achieve assistance in opening the door body of the opening and closing device and back pressure when the door body is closed, thereby improving customer experience and the sealing of the opening and closing device in the closed state.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and particularly relates to a hinge assembly and an opening / closing device. Background Art

[0002] The information provided in this part is only background information related to this application, and it is not necessarily prior art.

[0003] A freezer is a common opening / closing device, and freezers are usually configured with an upward-opening door structure. When opening the door of the freezer, it is necessary to overcome the gravity of the door body, so it is relatively laborious to open the door body. When closing the door body, the door body may fall at a relatively fast speed due to the action of gravity, resulting in a relatively violent collision between the door body and the cabinet body, affecting the user experience. In some cases, for example, when the door seal compensation is insufficient, the door body of the freezer is prone to not closing tightly, resulting in cold air leakage, affecting the refrigeration or freezing effect of the freezer, and increasing the energy consumption of the freezer, with a poor customer experience. Summary of the Invention

[0004] The purpose of this application is to at least alleviate the problems that the door body of an opening / closing device such as a freezer is laborious to open and is prone to not closing tightly. This purpose is achieved through the following technical solutions:

[0005] A first aspect of this application provides a hinge assembly, including:

[0006] A first fitting, one end of the first fitting is provided with a first curved surface and a second curved surface,

[0007] A second fitting, one end of the second fitting is provided with a third curved surface and a fourth curved surface;

[0008] The first fitting and the second fitting have a first posture and a second posture, and the first fitting and the second fitting can rotate relative to each other around a first axis to switch between the first posture and the second posture. In the first posture, the first curved surface abuts and cooperates with the third curved surface, so that the first fitting and the second fitting have a first acting force for relative rotation under the action of an axial force; in the second posture, the second curved surface abuts and cooperates with the fourth curved surface, so that the first fitting and the second fitting can have a second acting force for relative rotation under the action of the axial force; the directions of the first acting force and the second acting force are opposite.

[0009] According to the hinge assembly of the present application, in the first posture and the second posture, under the action of an axial force, the hinge assembly can have a force that causes the first fitting and the second fitting to rotate in opposite directions, so that one of the first posture and the second posture can be corresponding to the closed state or a state close to the closed state of the door body of the opening and closing device, and the other posture is corresponding to the open state of the door body of the opening and closing device. In the open state of the door body of the opening and closing device, the first fitting and the second fitting can provide an upward opening assistance force to the door body under the action of an axial force, which facilitates the opening operation of the door body. At the same time, it helps the door body to hover in the open state. When the door body moves from the open state to the closed state, it can also offset part of the gravity and reduce the risk of the door body falling rapidly; in the case where the door body of the opening and closing device is in the closed state, the first fitting and the second fitting can provide a downward counterpressure assistance force to the door body under the action of an axial force, reducing the possibility of the door body not closing tightly and improving the user experience.

[0010] In addition, the hinge assembly according to the present application may further have the following additional technical features:

[0011] In some embodiments of the present application, the first curved surface, the second curved surface, the third curved surface, and the fourth curved surface are helical surfaces. The helix directions of the first curved surface and the second curved surface are opposite, the helix directions of the third curved surface and the fourth curved surface are opposite, the helix directions of the first curved surface and the third curved surface are the same, and the helix directions of the second curved surface and the fourth curved surface are the same.

[0012] In some embodiments of the present application, the first curved surface, the second curved surface, the third curved surface, and the fourth curved surface all helically extend along the direction of the first axis.

[0013] In some embodiments of the present application, the first curved surface and the second curved surface are sequentially arranged along the circumferential direction of the first fitting, the third curved surface and the fourth curved surface are sequentially arranged along the circumferential direction of the second fitting, and the circumferential directions of the first fitting and the second fitting are both perpendicular to the direction of the first axis.

[0014] In some embodiments of the present application, the first fitting further has a first mating surface, and the first mating surface is disposed between the first curved surface and the second curved surface;

[0015] The second fitting further has a second mating surface, and the second mating surface is disposed between the third curved surface and the fourth curved surface;

[0016] The first mating surface and the second mating surface are both perpendicular to the direction of the first axis. The first fitting and the second fitting have a third posture between the first posture and the second posture. In the third posture, the first mating surface and the second mating surface are in abutting fit.

[0017] In some embodiments of the present application, the first curved surface and the second curved surface are both disposed on a side of the first mating surface away from the second fitting, and the third curved surface and the fourth curved surface are both disposed on a side of the second mating surface away from the first fitting.

[0018] In some embodiments of the present application, the first fitting further has a stop surface, and the stop surface is connected to an end of the second curved surface away from the first mating surface;

[0019] And / or, the second fitting further has a stop surface, and the stop surface is connected to an end of the fourth curved surface away from the second mating surface.

[0020] In some embodiments of the present application, the first fitting includes a plurality of first protrusion portions arranged at intervals in the circumferential direction of the first fitting, and the first curved surface and the second curved surface are disposed on each of the first protrusion portions;

[0021] The second fitting includes a plurality of second protrusion portions arranged at intervals in the circumferential direction of the second fitting, and the third curved surface and the fourth curved surface are disposed on each of the second protrusion portions. The plurality of first protrusion portions and the plurality of second protrusion portions are arranged in one-to-one correspondence;

[0022] The circumferential direction of the first fitting and the circumferential direction of the second fitting are both perpendicular to the direction of the first axis.

[0023] In some embodiments of the present application, an oil storage groove is provided on the first curved surface and / or the second curved surface and / or the third curved surface and / or the fourth curved surface.

[0024] In some embodiments of the present application, the hinge assembly further includes:

[0025] A first hinge seat, the first hinge seat is connected to the first fitting, and the first hinge seat rotates synchronously with the first fitting;

[0026] A second hinge seat, the second hinge seat is connected to the second fitting, and the second hinge seat rotates synchronously with the second fitting;

[0027] The first hinge seat is rotatably connected to the second hinge seat, and the first fitting is slidably connected to the first hinge seat in the direction of the first axis and / or the second fitting is slidably connected to the second hinge seat in the direction of the first axis.

[0028] In some embodiments of the present application, the first hinge seat is provided with a first receiving cavity extending in the direction of the first axis, the second hinge seat is provided with a second receiving cavity extending in the direction of the first axis, the first receiving cavity communicates with the second receiving cavity, the first fitting is disposed in the first receiving cavity, and the second fitting is disposed in the second receiving cavity.

[0029] In some embodiments of the present application, the first hinge seat and the first fitting are of an integral structure, and the second fitting can slide in the second receiving cavity in the direction of the first axis.

[0030] In some embodiments of the present application, the hinge assembly further includes an elastic member disposed in the second receiving cavity and located on a side of the second fitting away from the first fitting, and the elastic member is configured to apply the axial force to the second fitting and the first fitting.

[0031] In some embodiments of the present application, the first hinge seat includes a first clamping plate and a first hinge portion, the first clamping plate and the first hinge portion are of an integral structure, and the first receiving cavity is disposed in the first hinge portion;

[0032] The second hinge seat includes a second clamping plate and a second hinge portion, the second clamping plate and the second hinge portion are of an integral structure, and the second receiving cavity is disposed in the second hinge portion;

[0033] The first hinge portion is rotatably connected to the second hinge portion.

[0034] In some embodiments of the present application, a pressure relief hole is provided at an end of the first hinge portion away from the second hinge portion, and the pressure relief hole communicates with the first receiving cavity;

[0035] And / or, a pressure relief hole is provided at an end of the second hinge portion away from the first hinge portion, and the pressure relief hole communicates with the second receiving cavity.

[0036] In some embodiments of the present application, a first positioning portion is provided on the first hinge seat, a second positioning portion is provided on the second hinge seat, the second positioning portion and the first positioning portion can cooperate to position the first hinge seat and the second hinge seat at an initial installation angle, and the connection between the first positioning portion and the first hinge seat and / or the connection between the second positioning portion and the second hinge seat can be released.

[0037] A second aspect of the present application provides an opening and closing device, comprising:

[0038] A box body having an opening;

[0039] A door body, the door body is hinged to the opening of the box body through a hinge assembly.

[0040] In addition, according to the hinge assembly of the present application, the following additional technical features may also be provided:

[0041] In some embodiments of the present application, the opening and closing device is a refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0043] Figure 1 Schematically shows a schematic diagram of the hinge assembly of some embodiments of the present application;

[0044] Figure 2 Schematically shows a split schematic diagram of the hinge assembly of some embodiments of the present application;

[0045] Figure 3 Schematically shows a schematic diagram of one perspective of the second fitting of some embodiments of the present application;

[0046] Figure 4 Schematically shows a schematic diagram of one perspective of the first hinge seat and the first fitting of some embodiments of the present application;

[0047] Figure 5 Schematically shows a schematic diagram of another perspective of the first hinge seat and the first fitting of some embodiments of the present application;

[0048] Figure 6 Schematically shows a cross-sectional schematic diagram of the first fitting and the second fitting of some embodiments of the present application when the door body is in a closed state;

[0049] Figure 7 Schematically shows a schematic diagram of one perspective of the second hinge seat of some embodiments of the present application;

[0050] Figure 8 Schematically shows a cross-sectional schematic diagram of one direction of the hinge assembly of some embodiments of the present application;

[0051] Figure 9A cross-sectional view in another direction of the hinge assembly according to some embodiments of the present application is schematically shown;

[0052] Figure 10 is schematically shown Figure 9 an enlarged view of the T part of

[0053] Figure 11 A schematic diagram of the gasket according to some embodiments of the present application is schematically shown;

[0054] Figure 12 A cross-sectional view in one direction of the hinge assembly according to some embodiments of the present application is schematically shown;

[0055] Figure 13 is schematically shown Figure 12 a partial cross-sectional view along the A-A direction;

[0056] Figure 14 is schematically shown Figure 13 an enlarged view of the S part of

[0057] Figure 15 A schematic diagram of the opening and closing device according to some embodiments of the present application is schematically shown;

[0058] Figure 16 A rear view of the opening and closing device according to some embodiments of the present application is schematically shown;

[0059] Figure 17 is schematically shown Figure 16 an enlarged view of the R part of

[0060] Figure 18 is schematically shown Figure 16 a B-B cross-sectional view of

[0061] Figure 19 is schematically shown Figure 18 an enlarged view of the Q part of

[0062] Figure 20 A partial schematic diagram of an opening and closing device according to an embodiment of the present application is schematically shown;

[0063] Figure 21 is Figure 20 an assembly schematic diagram of the second hinge seat on the box body in

[0064] The reference numerals are as follows:

[0065] 10. Hinge assembly;

[0066] 100, First hinge seat; 110, First hinge part; 111, Second connection surface; 112, Annular step; 113, Annular groove; 120, First clamping plate; 121, First mounting hole; 122, First stop part; 130, First accommodation cavity; 140, First fitting part; 141, First curved surface; 142, Second curved surface; 143, First bottom surface; 144, Oil storage groove; 145, First mating surface; 146, First convex part; 150, First positioning part; 160, Reinforcing rib;

[0067] 200, Second hinge seat; 210, Second hinge part; 211, Raised strip; 212, Extension part; 213, Annular boss; 214, Annular protrusion; 215, First connection surface; 221, First sub-clamping plate; 222, Second sub-clamping plate; 223, Second mounting hole; 224, Second stop part; 230, Second accommodation cavity; 240, Second positioning part; 250, Pressure relief hole;

[0068] 300, Second fitting part; 310, Second fitting structure; 311, Third curved surface; 312, Fourth curved surface; 313, Second bottom surface; 314, Second mating surface; 315, Stop surface; 316, Second convex part; 320, First guiding structure;

[0069] 400, Elastic part;

[0070] 500, Connecting shaft; 510, Through hole;

[0071] 600, Gasket; 610, Notch;

[0072] 20, Box body; 202, Third opening; 203, Fourth opening; 204, Installation cavity; 105, Clamping groove; 206, Opening; 207, Card slot;

[0073] 30, Door body;

[0074] X, Direction of the first axis. Detailed implementation manners

[0075] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be fully conveyed to those skilled in the art.

[0076] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0077] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0078] For ease of description, spatial relative relation terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such relative relation terms such as "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over" and the like. Such spatial relative relation terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relation descriptors used herein are to be interpreted accordingly.

[0079] As Figures 1 to 21 shown, according to an embodiment of the present application, a hinge assembly 10 is provided, which includes a first fitting 140 and a second fitting 300 that are rotatably connected. One end of the first fitting 140 is provided with a first curved surface 141 and a second curved surface 142, and one end of the second fitting 300 is provided with a third curved surface 311 and a fourth curved surface 312.

[0080] One end of the first fitting 140 provided with a first curved surface 141 and a second curved surface 142 can be correspondingly abutted against one end of the second fitting 300 provided with a third curved surface 311 and a fourth curved surface 312. The first curved surface 141, the second curved surface 142, the third curved surface 311, and the fourth curved surface 312 can all extend along the direction X of the first axis, wherein the direction X of the first axis is the axis direction of the relative rotation of the first fitting 140 and the second fitting 300.

[0081] The first fitting 140 can include a first protrusion 146 protruding toward the second fitting 300, and both the first curved surface 141 and the second curved surface 142 are provided on the surface of the first protrusion 146. The second fitting 300 can include a second protrusion 316 protruding toward the first fitting 140, and both the third curved surface 311 and the fourth curved surface 312 are provided on the surface of the second protrusion 316.

[0082] Wherein, the first curved surface 141 and the second curved surface 142 can be sequentially arranged along the circumferential direction of the first fitting 140, the third curved surface 311 and the fourth curved surface 312 can be sequentially arranged along the circumferential direction of the second fitting 300, and the circumferential directions of both the first fitting 140 and the second fitting 300 are perpendicular to the direction X of the first axis.

[0083] The first fitting 140 and the second fitting 300 have a first posture and a second posture. The first fitting 140 and the second fitting 300 can rotate relative to each other around the first axis to switch between the first posture and the second posture. In the first posture, the first curved surface 141 is in abutting engagement with the third curved surface 311, so that the first fitting 140 and the second fitting 300 have a first acting force for relative rotation under the action of an axial force. In the second posture, the second curved surface 142 is in abutting engagement with the fourth curved surface 312, so that the first fitting 140 and the second fitting 300 can have a second acting force for relative rotation under the action of an axial force; the directions of the first acting force and the second acting force are opposite.

[0084] Wherein, the direction of the axial force can be the same as the direction of the first axis. The axial force can be applied by an elastic member, such as a spring.

[0085] According to the hinge assembly of the present application, in the first posture and the second posture, under the action of an axial force, the hinge assembly 10 can have a force that causes the first fitting 140 and the second fitting 300 to rotate in opposite directions. In this way, one of the first posture and the second posture can be corresponded to the closed state or a state close to the closed state of the door body 30 of the opening and closing device, and the other posture can be corresponded to the open state of the door body 30 of the opening and closing device. When the door body 30 of the opening and closing device is in the open state, the first fitting 140 and the second fitting 300 can provide an upward opening assistance force to the door body 30 under the action of an axial force, which facilitates the opening operation of the door body 30. At the same time, it helps the door body 30 to hover in the open state. When the door body 30 moves from the open state to the closed state, it can also offset part of the gravity and reduce the risk of the door body 30 falling rapidly. When the door body 30 of the opening and closing device is in the closed state, the first fitting 140 and the second fitting 300 can provide a downward counter-pressure assistance force to the door body under the action of an axial force, reducing the possibility of the door body not closing tightly and improving the user experience.

[0086] It should be noted that, for the convenience of description, in the following embodiments of the present application, the first posture is mainly corresponded to the open state of the door body 30 of the opening and closing device, and the second posture is corresponded to the closed state or a state close to the closed state of the door body 30 of the opening and closing device, and related solutions will be described.

[0087] In one implementation, the first curved surface 141, the second curved surface 142, the third curved surface 311, and the fourth curved surface 312 are helical surfaces. The helix directions of the first curved surface 141 and the second curved surface 142 are opposite, the helix directions of the third curved surface 311 and the fourth curved surface 312 are opposite, the helix directions of the first curved surface 141 and the third curved surface 311 are the same, and the helix directions of the second curved surface 142 and the fourth curved surface 312 are the same.

[0088] Among them, the first curved surface 141, the second curved surface 142, the third curved surface 311, and the fourth curved surface 312 all helically extend along the direction X of the first axis.

[0089] Since the helix directions of the first curved surface 141 and the second curved surface 142 are opposite, and the helix directions of the third curved surface 311 and the fourth curved surface 312 are opposite, in this way, in the first posture and the second posture, the first fitting 140 and the second fitting 300 can generate forces that cause the relative rotation directions of the first fitting 140 and the second fitting 300 to be opposite under the action of the same axial force.

[0090] It should be noted that the axial force acting on the first fitting 140 and the second fitting 300 along the axis of their relative rotation can be specifically provided by an elastic member 400 such as a spring. The spring can be arranged outside the hinge structure or integrated into the hinge structure as a part of the hinge structure. In the following embodiments, a specific way of integrating the elastic member 400 into the hinge assembly 10 will be given.

[0091] Optionally, as shown in Figures 3 to 6 In some embodiments, the first fitting 140 further has a first mating surface 145, which is disposed between the first curved surface 141 and the second curved surface 142; the second fitting 300 further has a second mating surface 314, which is disposed between the third curved surface 311 and the fourth curved surface 312. Among them, both the first mating surface 145 and the second mating surface 314 are perpendicular to the direction X of the first axis. The first fitting 140 and the second fitting 300 have a third posture between the first posture and the second posture. In the third posture, the first mating surface 145 and the second mating surface 314 are in abutting engagement, and the direction X of the first axis is the axis direction of the relative rotation of the first fitting 140 and the second fitting 300.

[0092] When the first fitting 140 and the second fitting 300 are subjected to an axial force, in the third posture, the first fitting 140 and the second fitting 300 generally cannot convert the axial acting force into a force that causes the first fitting 140 and the second fitting 300 to rotate relative to each other. That is to say, the third posture is a transitional state between the first posture and the second posture. The first mating surface 145 and the second mating surface 314 can be set as required. Generally, in the rotatable stroke of the first fitting 140 and the second fitting 300, the stroke occupied by the third posture in which the first mating surface 145 and the second mating surface 314 are in abutting engagement is shorter than the stroke occupied by the first posture in which the first curved surface 141 and the third curved surface 311 are in abutting engagement, and is shorter than the stroke occupied by the second posture in which the second curved surface 142 and the fourth curved surface 312 are in abutting engagement. The stroke occupied by each posture can be referenced by the rotation angle of the first fitting 140 and the second fitting 300 corresponding to each posture. The shorter the stroke, the smaller the rotation angle of the first fitting 140 and the second fitting 300 in that posture. The rotation angle corresponding to the first fitting 140 and the second fitting 300 can be understood as starting from when the first fitting 140 and the second fitting 300 rotate relative to each other to this posture, and ending when the first fitting and the second fitting 300 rotate out of this posture. Between the starting point and the ending point, the angle turned by the first fitting 140 and the second fitting 300.

[0093] Optionally, both the first surface 141 and the second surface 142 are disposed on a side of the first mating surface 145 away from the second fitting 300, and both the third surface 311 and the fourth surface 312 are disposed on a side of the second mating surface 314 away from the first fitting 140.

[0094] Referring Figures 3 to 5 As shown, the first mating surface 145 protrudes towards the second fitting 300 relative to the first surface 141 and the second surface 142. In other words, the first surface 141 and the second surface 142 are recessed relative to the first mating surface 145 away from the second fitting 300, and the first mating surface 145 is equivalent to a convex point portion. The second mating surface 314 protrudes towards the first fitting 140 relative to the third surface 311 and the fourth surface 312. In other words, the third surface 311 and the fourth surface 312 are recessed relative to the second mating surface 314 away from the first fitting 140, and the second mating surface 314 is equivalent to a convex point portion.

[0095] Optionally, the first fitting 140 may further be provided with a stop surface, and the stop surface is connected to an end of the second surface 142 away from the first mating surface 145. When the first fitting 140 and the second fitting 300 are rotated to a required limit angle (for example, when the door body 30 is rotated to the lowest point, or when the door body 30 is rotated to the highest point), the stop surface can cooperate with a corresponding structure or a corresponding surface of the second fitting 300 to play a role in stopping rotation.

[0096] It can be understood that the second fitting 300 may also be provided with a stop surface 315, and the stop surface 315 is connected to an end of the fourth surface 312 away from the second mating surface 314, and the stop surface 315 can also limit the rotation angle range of the first fitting 140 and the second fitting 300.

[0097] As Figure 6 and Figure 16 shown, in one embodiment, the first posture is the open state of the door body 30, the second posture is the state where the door body 30 is closed or nearly closed, the first fitting 140 is used to connect with the door body 30 and rotate following the door body 30, and the second fitting 300 is used to connect with the box body 20. A stop surface 315 may be provided on the second fitting 300. When the door body 30 is rotated to make the first fitting 140 and the second fitting 300 in the second posture, the stop surface 315 can cooperate with the first surface 141 to limit the first fitting 140 and the second fitting 300 from continuing to rotate in the direction of closing the door body 30.

[0098] In some embodiments, referring Figures 3 to 5As shown, the first fitting 140 includes a plurality of first protrusions 146 circumferentially spaced apart. Each first protrusion 146 is provided with a first curved surface 141 and a second curved surface 142; the second fitting 300 includes a plurality of second protrusions 316 circumferentially spaced apart. Each second protrusion 316 is provided with a third curved surface 311 and a fourth curved surface 312. The plurality of first protrusions 146 and the plurality of second protrusions 316 are arranged in one-to-one correspondence; the circumferential direction is perpendicular to the direction X of the first axis.

[0099] In one embodiment, the hinge structure further includes a first hinge seat 100 and a second hinge seat 200. The first hinge seat 100 is connected to the first fitting 140 and rotates synchronously with the first fitting 140. The second hinge seat 200 is connected to the second fitting 300 and rotates synchronously with the second fitting 300; the first fitting 140 and the first hinge seat 100 are slidably connected along the direction X of the first axis and / or the second fitting 300 and the second hinge seat 200 are slidably connected along the direction X of the first axis.

[0100] In practical applications, the first hinge seat 100 can be connected to the door body 30 of the opening and closing device, and the second hinge seat 200 can be connected to the box body 20 of the opening and closing device.

[0101] Optionally, the first hinge seat 100 is provided with a first receiving cavity 130 extending along the direction X of the first axis, and the second hinge seat 200 is provided with a second receiving cavity 230 extending along the direction X of the first axis. The first receiving cavity 130 communicates with the second receiving cavity 230. The first fitting 140 is disposed in the first receiving cavity 130, and the second fitting 300 is disposed in the second receiving cavity 230.

[0102] Specifically, the first hinge seat 100 and the first fitting 140 can be integrally formed, and the second fitting 300 can be arranged to be slidable along the direction X of the first axis in the second receiving cavity 230.

[0103] Furthermore, the hinge assembly 10 further includes an elastic member 400. The elastic member 400 is disposed in the second receiving cavity 230 and is located on the side of the second fitting 300 away from the first fitting 140. The elastic member 400 can be compressed to apply an axial force, that is, a thrust, to the second fitting 300 and the first fitting 140. In the first posture, the acting force applied by the elastic member 400 to the second fitting 300 can cause the first fitting 140 to rotate relative to the second fitting 300 in the first rotation direction; in the second posture, the acting force applied by the elastic member 400 to the second fitting 300 can cause the first fitting 140 to rotate relative to the second fitting 300 in the opposite direction of the first rotation direction.

[0104] In a specific embodiment, the hinge assembly 10 includes a first hinge seat 100, a second hinge seat 200, a second fitting 300, and an elastic member 400. The first hinge seat 100 has a first fitting 140, and the first fitting 140 has a first curved surface 141 and a second curved surface 142. The second hinge seat 200 has a second receiving cavity 230 extending in the direction X along the first axis, and one end of the second receiving cavity 230 has a first opening. The second fitting 300 is disposed in the second receiving cavity 230. The second fitting 300 is relatively fixed to the second hinge seat 200 in the circumferential direction of the second receiving cavity 230, and the second fitting 300 can slide in the direction X along the first axis in the second receiving cavity 230. The second fitting 300 has a second fitting structure 310, and the second fitting structure 310 has a third curved surface 311 and a fourth curved surface 312. The second fitting structure 310 abuts against the first fitting 140 through the first opening. The elastic member 400 is disposed in the second receiving cavity 230 and is located at one end of the second fitting 300 facing away from the first fitting 140. The elastic member 400 applies a thrust to the second fitting 300 to move the second fitting 300 toward the first fitting 140.

[0105] The hinge assembly 10 has a first posture and a second posture. The first hinge seat 100 can reciprocally rotate relative to the second hinge seat 200 around an axis extending in the direction X along the first axis within a preset angular range, so that the first fitting 140 and the second fitting structure 310 slide relative to each other, so that the hinge assembly 10 switches between the first posture and the second posture. In the second posture, the second curved surface 142 abuts against the fourth curved surface 312, and the elastic member 400 causes the first hinge seat 100 to have a torque to rotate in the opposite direction of the first rotation direction relative to the second hinge seat 200; in the first posture, the first curved surface 141 abuts against the third curved surface 311, and the elastic member 400 causes the first hinge seat 100 to have a torque to rotate in the first rotation direction relative to the second hinge seat 200. The first rotation direction is the same as the rotation direction of the first hinge seat 100 relative to the second hinge seat 200 when rotating from the second posture to the first posture.

[0106] Wherein, the first hinge seat 100 can be connected to the door body 30 of the opening and closing device, and the second hinge seat 200 can be connected to the box body 20 of the opening and closing device. During the opening and closing of the door body 30, the second hinge seat 200 is fixedly arranged, and the first hinge seat 100 rotates synchronously with the door body 30.

[0107] When the hinge assembly 10 is assembled to the opening and closing device, the direction X of the first axis can be configured to be parallel to the opening direction of the opening and closing device. When the opening and closing device is placed on a relatively flat ground, the direction X of the first axis can be understood with reference to the horizontal direction. When the opening and closing device is an upward-opening door and the opening and closing side of the door body 30 faces forward, and the hinge assembly 10 is disposed at the rear side of the opening and closing device, the direction X of the first axis can be the left-right direction of the opening and closing device.

[0108] When the hinge assembly 10 is assembled, the first posture of the hinge assembly 10 can correspond to the maximum opening state of the door body 30 of the opening and closing device and the state where the opening angle of the door body 30 is relatively large, and the second posture can correspond to the closed state of the door body 30 of the opening and closing device and the state where the opening angle of the door body 30 is relatively small. In this way, the first rotation direction is also the opening direction of the door body 30. Specifically, the maximum opening angle of the door body 30 corresponding to the second posture can be in the range where the door body 30 rotates 10 degrees to 45 degrees from the closed state towards the opening direction. For example, the opening angle of the door body 30 corresponding to the second posture is 0 degrees to 15 degrees, 0 degrees to 20 degrees, or 0 degrees to 21 degrees, or 0 degrees to 25 degrees, 0 degrees to 30 degrees, 0 degrees to 35 degrees, 0 degrees to 40 degrees, or 0 degrees to 45 degrees, etc. when the door body 30 is opened. Among them, the maximum opening angle of the door body 30 corresponding to the second posture is the maximum opening angle when the hinge assembly 10 cannot buffer the closing of the door body 30 or assist the opening of the door body 30. In other words, after the door body 30 is opened from the closed state to exceed the maximum opening angle of the door body 30 corresponding to the second posture, the first curved surface 141 abuts against the third curved surface 311, and the hinge assembly 10 can assist the opening of the door body 30; before the door body 30 rotates from the maximum opening state to the maximum opening angle of the door body 30 corresponding to the second posture, the first curved surface 141 abuts against the third curved surface 311, and the hinge assembly 10 can buffer the closing of the door body 30.

[0109] During actual assembly, the elastic member 400 can be reasonably set according to the gravity of the door body 30, etc., so that the torque generated by the hinge assembly 10 in the first posture can be greater than the torque generated by the gravity of the door body 30, so that in the first posture, the door body 30 can hover. When the door body 30 can hover in the first posture, the opening angle of the door body 30 corresponding to the first posture is also the hovering angle of the door body 30. The lower limit of the hovering angle range is the same as the opening angle of the door body corresponding to the third posture, that is, the opening angle of the door body 30 corresponding to the third posture can be the critical point between hovering and non-hovering. When it is greater than the maximum opening angle of the door body 30 corresponding to the third posture, the door body 30 can hover; when it is less than the maximum opening angle of the door body 30 corresponding to the third posture, the door body 30 cannot hover; the upper limit of the hovering angle range can be the same as the angle when the door body 30 is opened to the maximum state.

[0110] The preset angle range within which the first hinge seat 100 rotates relative to the second hinge seat 200 corresponds to the opening degree of the door body 30. That is, when the door body 30 rotates from the closed state to the maximum open state, the angle range through which the door body 30 rotates can be used as the preset angle range within which the first hinge seat 100 rotates relative to the second hinge seat 200. In this embodiment, the angle at which the door body 30 is in the maximum open state can be 70 degrees to 90 degrees. For example, the rotation angle range of the door body 30 can be 0 degrees to 90 degrees, 0 degrees to 85 degrees, 0 degrees to 80 degrees, 0 degrees to 75 degrees, or 0 degrees to 70 degrees. In some technologies, the rotation angle range of the door body 30 can be specifically set to 0 degrees to 80 degrees. Among them, when it is at 0 degrees, the door body 30 is closed, and when it is at 80 degrees, the door body 30 is in the maximum open state.

[0111] The second receiving cavity 230 can be in the shape of a cylinder with a circular cross-section.

[0112] The first fitting 140 and the second fitting structure 310 can be a structure similar to a ratchet tooth. Specifically, one end of the first hinge seat 100 facing the second fitting 300 can be provided with a structure similar to a ratchet tooth, including a plurality of (specifically, it can be two, three or more, and generally set to two based on reasonable consideration of occupied space and strength) first grooves arranged at intervals along the circumferential direction. The side wall of the first groove forms a first protrusion 146, and the wall surface of the corresponding side wall forms a first curved surface 141, a first mating surface 145, and a second curved surface 142. The second fitting 300 is generally arranged in a cylindrical shape. One end of the second fitting 300 facing the first fitting 140 can be provided with a structure similar to a ratchet tooth, including a plurality of second grooves arranged at intervals along the circumferential direction. The second grooves are arranged in one-to-one correspondence with the first grooves. The side wall of the second groove forms a second protrusion 316, and the wall surface of the corresponding second groove forms a third curved surface 311, a fourth curved surface 312, and a second mating surface 314.

[0113] When the first hinge seat 100 rotates relative to the second hinge seat 200, the first fitting 140 and the second fitting structure 310 can slide relative to each other, so that different positions of the first fitting 140 cooperate with different positions of the second fitting structure 310. Among them, when the door body 30 is closed, the hinge assembly 10 can be in the second posture, the second curved surface 142 abuts against the fourth curved surface 312, and at this time the elastic member 400 is in a compressed state. In this way, the thrust exerted by the elastic member 400 on the second fitting 300 generates a torque in the radial tangential direction at the abutting position of the second curved surface 142 and the fourth curved surface 312. This torque causes the door body 30 to have a tendency to rotate in the closing direction, so as to assist in closing the door body 30. The door body 30 is covered on the box body 20 by relying on gravity and the counter pressure formed by the spring. During the opening process of the door body 30, the second curved surface 142 slides relative to the fourth curved surface 312 and gradually changes to the first mating surface 145 abutting against the second mating surface 314. At this time, the first fitting 140 and the second fitting 300 do not have a relative rotation torque. As the door body 30 continues to open, the first curved surface 141 abuts against the third curved surface 311, and the first curved surface 141 slides relative to the third curved surface 311. The elastic member 400 gradually returns to its original position, while maintaining the thrust exerted on the second fitting 300, the thrust gradually decreases. When the first curved surface 141 abuts against the third curved surface 311, that is, in the first posture, the thrust exerted by the elastic member 400 on the second fitting 300 generates a torque in the radial tangential direction at the abutting position of the first curved surface 141 and the third curved surface 311. This torque causes the door body 30 to have a tendency to rotate in the opening direction, so as to balance the gravity of the door body 30. When the door body 30 is opened to the maximum opening degree, the first curved surface 141 and the third curved surface 311 can still remain in contact. And when the door body 30 is opened to the maximum opening degree, the ratchet-like structures of the first hinge seat 100 and the second fitting 300 can be meshed and fitted, that is, the side wall of the first groove is inserted into the second groove, the side wall of the second groove is inserted into the first groove, the first mating surface 145 can abut against the bottom surface of the second groove (the second bottom surface 313), and the second mating surface 314 can abut against the bottom surface of the first groove (the first bottom surface 143).

[0114] The elastic member 400 is specifically a spring. After the hinge assembly 10 is assembled, the spring can always be in a compressed state so that the spring can exert a thrust on the second fitting 300.

[0115] According to the hinge assembly 10 of this embodiment, the hinge assembly 10 can be connected between the cabinet body 20 and the door body 30 of an opening and closing device (such as a freezer), so that the door body 30 is hinged to the cabinet body 20. Among them, the door body 30 can be connected to the first hinge seat 100, and the cabinet body 20 can be connected to the second hinge seat 200. The rotation of the first hinge seat 100 relative to the second hinge seat 200 along the first rotation direction can be configured to open the door body 30. Through the cooperation between the second fitting 300 and the first fitting 140, the hinge assembly 10 of this embodiment can convert the lateral force of the elastic member 400 (i.e., the spring) into a force consistent with the rotation direction of the first hinge seat 100, and finally realize the rotation of the hinge assembly 10 and the opening and closing of the door body 30. Specifically, during the opening process of the door body 30, when the hinge assembly 10 rotates to the first posture, the elastic member 400 causes the first hinge seat 100 to have a torque to rotate relative to the second hinge seat 200 along the first rotation direction, that is, the thrust applied by the elastic member 400 to the second fitting 300 can assist the opening of the door body 30 through the first curved surface 141 and the third curved surface 311; during the closing process of the door body 30, the component force of the torque formed by the elastic member 400 on the hinge assembly 10 can at least balance part of the gravity of the door body 30, relieve the problem that the door body 30 drops rapidly, resulting in a violent collision between the door body 30 and the cabinet body 20, and improve the user experience. When the door is closed and the hinge assembly 10 rotates to the second posture, the elastic member 400 causes the first hinge seat 100 to have a torque to rotate in the opposite direction of the first rotation direction relative to the second hinge seat 200, that is, the thrust applied by the elastic member 400 to the second fitting 300 can assist the closing of the door body 30 through the second curved surface 142 and the fourth curved surface 312, so that the door can have better closing tightness, is convenient to assemble, reduces the space occupied by the hinge assembly 10, increases the number of opening and closing devices that can be loaded on the transportation tool, and reduces the transportation cost of the opening and closing device.

[0116] Furthermore, the elastic member 400 and the second fitting 300 are both arranged in the second accommodation cavity 230 of the second hinge seat 200, and the elastic member 400 is built-in, reducing the risk of the hinge assembly 10 pinching the fingers of users or assembly workers and improving safety.

[0117] In this embodiment, the axial force of the elastic member 400 along the direction X of the first axis can be converted into the torque for the rotation of the first hinge seat 100 by the first fitting member 140 and the second fitting structure 310, and the torque is relatively large. In this way, the elastic force required for the elastic member 400 is reduced. When the elastic member 400 is a spring, the wire diameter of the spring can be about 2.5 mm, and the outer diameter of the overall spring can be no more than 16 mm, specifically, it can be 15.8 mm, etc. Since the size of the elastic member 400 is reduced, the influence of the hinge assembly 10 on the space occupancy rate of the opening and closing device can be reduced, that is, the protruding size of the rear side of the hinge assembly 10 from the side wall of the box body 20 is reduced. Combining with the reasonable design of the box body 20, when the hinge assembly 10 of this embodiment is installed on the opening and closing device, the size of the hinge assembly 10 protruding from the side wall of the box body 20 can be no more than 10 mm, thereby improving the overall container loading capacity of the product and saving transportation costs.

[0118] It should be noted that this embodiment is mainly described by taking the connection of the first hinge seat 100 with the door body 30 of the opening and closing device and the connection of the second hinge seat 200 with the box body 20 of the opening and closing device as an example. However, in actual assembly, according to needs, the first hinge seat 100 can also be connected to the box body 20 of the opening and closing device, and the second hinge seat 200 can be connected to the door body 30 of the opening and closing device. That is, the first hinge seat 100 and the box body 20 are relatively fixedly arranged, and the second hinge seat 200 rotates synchronously with the door body 30. At this time, the first hinge seat 100 is fixed. According to the relativity of motion, the rotation of the first hinge seat 100 relative to the second hinge seat 200 can be realized by the rotation of the second hinge seat 200.

[0119] According to some embodiments of the present application, optionally, in some embodiment manners, such as Figure 1 、 Figure 2 and Figure 4 and Figure 5 As shown, the first hinge seat 100 includes a first clamping plate 120 and a first hinge portion 110. The first clamping plate 120 and the first hinge portion 110 are integrally formed, and the first fitting member 140 is arranged on the first hinge portion 110. The second hinge seat 200 includes a second clamping plate and a second hinge portion 210. The second clamping plate and the second hinge portion 210 are integrally formed, and the second receiving cavity 230 is provided with the second hinge portion 210. The first hinge portion 110 and the second hinge portion 210 are rotatably connected. The first clamping plate 120 is used to connect with the door body 30 of the opening and closing device, and the second clamping plate is used to connect with the box body 20 of the opening and closing device.

[0120] The first hinge seat 100 can be integrally formed by injection molding, and the first clamping plate 120 and the first hinge portion 110 are formed by injection molding. The second hinge seat 200 can be integrally formed by injection molding, and the second clamping plate and the second hinge portion 210 are formed by injection molding.

[0121] Optionally, the first clamping plate 120 may be provided with first mounting holes 121 for cooperating with fixing members to fix the first clamping plate 120 to the door body 30. The number of the first mounting holes 121 may be one or multiple spaced-apart ones. The fixing members may be bolts, screws, etc. In a specific implementation manner, the first mounting holes 121 are mounting holes and the fixing members are bolts.

[0122] Optionally, the second clamping plate includes a first sub-clamping plate 221 and a second sub-clamping plate 222. Among them, the second sub-clamping plate 222 is provided with second mounting holes 223 for cooperating with fixing members to fix the second sub-clamping plate 222 to the box body 20. The number of the second mounting holes 223 may be one or multiple spaced-apart ones. The fixing members may be bolts, screws, etc. The first sub-clamping plate 221 is fixedly connected to the second hinge portion 210 and is located on the side of the second sub-clamping plate 222 close to the door body 30. The first sub-clamping plate 221 is used for plugging and fixing with the box body 20, and specifically may be plugged and matched with a clamping groove 105 arranged horizontally or vertically on the box body 20. The first sub-clamping plate 221 is connected to the box body 20 by plugging. During the opening process of the door body 30, that is, when the first hinge seat 100 rotates, the first sub-clamping plate 221 is the main component bearing the torque, and the second sub-clamping plate 222 can play a role in strengthening the fixation between the second hinge seat 200 and the door body 30 through the fixation of the second mounting holes 223, and can prevent the second hinge seat 200 from moving around. Among them, both the first sub-clamping plate 221 and the second sub-clamping plate 222 and the second hinge portion 210 may be of an integral structure.

[0123] In a specific embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, and in combination with Figure 16 、 Figure 17As shown, the first card plate 120 has a door body mounting surface facing the door body 30, and the door body mounting surface can be a plane. The first card plate 120 is attached to the end surface of the door body 30 through the door body mounting surface, and bolts or screws are fixedly connected to the door body 30 through the first mounting holes 121, so that the first card plate 120 is fixedly connected to the door body 30. The second sub-card plate 222 has a box body mounting surface facing the box body 20, and the box body mounting surface can be a plane. The second sub-card plate 222 is attached to the outer side surface of the box body 20 through the box body mounting surface, and bolts or screws are fixedly connected to the side wall of the box body 20 (when the second sub-card plate 222 is attached to the rear side surface, the side wall is the rear side wall) through the second mounting holes 223, so that the second sub-card plate 222 is fastened to the box body 20. Specifically, the hinge assembly 10 can be arranged at the rear side of the opening and closing device, the first card plate 120 can be attached to and fixedly connected with the rear end surface of the door body 30, and the second sub-card plate 222 can be attached to and fixedly connected with the rear side surface of the box body 20; when the door body 30 is closed, the first card plate 120 and the second sub-card plate 222 are arranged approximately in the vertical direction, that is, the angle between the first card plate 120 and the second sub-card plate 222 is 180 degrees or approximately 180 degrees. During the opening process of the door body 30, the first card plate 120 and the first hinge part 110 rotate backward synchronously, and the angle between the first card plate 120 and the second sub-card plate 222 on the side facing the opening and closing device increases, and the angle between the first card plate 120 and the second sub-card plate 222 on the side facing away from the closing device (the angle and the angle on the side facing the opening and closing device are the mutual circumference angle) decreases.

[0124] In some embodiments, such as Figure 1 and Figure 2 As shown in FIG. 1 , the first card board 120 may be provided with three first mounting holes 121, wherein two first mounting holes 121 are arranged at intervals and aligned along the direction X of the first axis, and another first mounting hole 121 is arranged on a side of the above two first mounting holes 121 close to the second sub-card board 222, that is, the three first mounting holes 121 may be arranged in a triangle in sequence. The second sub-card board 222 may be provided with two second mounting holes 223, wherein the two second mounting holes 223 are arranged at intervals and aligned along the direction X of the first axis.

[0125] Optionally, the first card plate 120 and the second sub-card plate 222 may also be provided with reinforcing ribs 160. Specifically, in one implementation, one or more reinforcing ribs 160 are provided on the surface of the first card plate 120 opposite to the door body mounting surface, and one or more reinforcing ribs 160 are provided on the surface of the second sub-card plate 222 opposite to the box body mounting surface. The reinforcing ribs 160 can increase the strength of the first card plate 120 and / or the second sub-card plate 222, and improve the service life of the first card plate 120 and the second sub-card plate 222. The reinforcing ribs 160 can be integrally constructed with the corresponding card plate.

[0126] ​​Optionally, in order to limit the fully opened state of the door body 30, that is, to limit the opening degree of the door body 30, corresponding stop structures may be provided on the first clamping plate 120 and the second sub-clamping plate 222. Specifically, in a specific implementation manner, a first stop portion 122 is provided on a side of the first clamping plate 120 close to the second hinge portion 210, and a second stop portion 224 is provided on a side of the second sub-clamping plate 222 close to the first hinge portion 110. The first stop portion 122 and the second stop portion 224 cooperate to define the maximum angle of rotation of the first hinge seat 100 and the second hinge portion 210 along the first rotation direction.

[0127] The first stop portion 122 may be an integral structure with the first clamping plate 120, and the second stop portion 224 may be an integral structure with the second sub-clamping plate 222. The first stop portion 122 may be provided on a surface of the first clamping plate 120 opposite to the door body mounting surface, and the second stop portion 224 may be provided on an end surface of the second sub-clamping plate 222 connected to the cabinet connection surface.

[0128] According to some embodiments of the present application, optionally, the first hinge portion 110 is provided with a first receiving cavity 130. A second opening of the first receiving cavity 130 is opposite to and communicated with the first opening. The first fitting 140 is disposed in the first receiving cavity 130. One end of the first hinge portion 110 provided with the second opening is hermetically connected to one end of the second hinge portion 210 provided with the first opening.

[0129] The first receiving cavity 130 may be in the shape of a cylinder with a circular cross-section.

[0130] The first fitting 140 and the second fitting structure 310 need to cooperate and slide. In order to improve the smoothness of the sliding and reduce the wear of the first fitting 140 and the second fitting structure 310, lubricating oil may be added between the first fitting 140 and the second fitting structure 310. The first hinge portion 110 is provided with the first receiving cavity 130, and the first receiving cavity 130 is hermetically connected and communicated with the second receiving cavity 230, so that the first fitting 140 and the second fitting structure 310 can be in a relatively sealed environment, ensuring the effectiveness of the storage and long-term use of the lubricating oil.

[0131] Refer to Figure 9 and Figure 10As shown, in one implementation, the end face of the second hinge portion 210 with the first opening has an annular first connection surface 215 and an annular boss 213 protruding relative to the first connection surface 215. Along the radial direction, the annular boss 213 is located inside the first connection surface 215. The end face of the first hinge portion 110 with the second opening has an annular second connection surface 111 and an annular step 112 recessed relative to the second connection surface 111. Along the radial direction, the annular step 112 is located inside the second connection surface 111. After the first hinge portion 110 is connected to the second hinge portion 210, the first connection surface 215 and the second connection surface 111 are disposed opposite to each other, the annular boss 213 and the recessed annular step 112 are correspondingly disposed, and annular grooves 113 and annular protrusions 214 that cooperate with each other may be provided on the annular boss 213 and the annular step 112. Specifically, an annular protrusion 214 may be provided on the annular boss 213, and an annular groove 113 may be provided on the annular step 112, and the annular groove 113 and the annular protrusion 214 are inserted and matched with each other.

[0132] It can be understood that the matching structure of the annular protrusion 214 and the annular groove 113 on the annular boss 213 and the annular step 112 can form an oil locking structure, that is, a sealing groove structure, on the end face where the first hinge portion 110 and the second hinge portion 210 are connected, reducing the risk of lubricating oil leaking from the connection end face of the first hinge portion 110 and the second hinge portion 210.

[0133] According to some embodiments of the present application, optionally, as Figure 4 shown, an oil storage groove 144 may be provided on the second curved surface 142 and / or the fourth curved surface 312 and / or the first curved surface 141 and / or the third curved surface 311.

[0134] Specifically, the oil storage groove 144 may be provided on one of the second curved surface 142, the fourth curved surface 312, the first curved surface 141, and the third curved surface 311, or may be provided on two of them, or may be provided on three of them, or may be provided on all four of them.

[0135] The oil storage groove 144 is a groove formed on the corresponding surface. On the same mating surface or the same curved surface, the number of oil storage grooves 144 may be set to one or more.

[0136] As Figure 4 shown, in a specific embodiment of the present application, an oil storage groove 144 is provided at the sliding structure of the first fitting 140 of the first hinge seat 100, that is, an oil storage groove 144 may be provided on the first curved surface 141.

[0137] The oil storage tank 144 can be used to store a part of the lubricating oil. When the first hinge seat 100 rotates relative to the second hinge seat 200, the lubricating oil can be stored in the oil storage tank 144, reducing the wear between the first fitting 140 and the second fitting structure 310.

[0138] According to some embodiments of the present application, optionally, a pressure relief hole 250 is provided on the first hinge portion 110 and / or the second hinge portion 210, and the pressure relief hole 250 communicates with the second accommodation cavity 230. Wherein, when the pressure relief hole 250 is provided on the first hinge portion 110, the pressure relief hole 250 provided on the first hinge portion 110 can communicate with the first accommodation cavity 130. Since the first accommodation cavity 130 communicates with the second accommodation cavity 230, the pressure relief hole 250 also communicates with the second accommodation cavity 230.

[0139] In a specific embodiment, as Figure 1 、 Figure 7 shown, a pressure relief hole 250 may also be provided at one end of the second hinge portion 210 away from the first opening, and the pressure relief hole 250 communicates with the second accommodation cavity 230.

[0140] When the hinge assembly 10 rotates, the lubricating oil inside the hinge assembly 10, that is, inside the second accommodation cavity 230 and the oil storage tank 144, is squeezed, and the internal space will be compressed, resulting in a local pressure increase. By providing the pressure relief hole 250, the oil leakage problem caused by the imbalance of the internal air pressure can be avoided.

[0141] It should be noted that the pressure relief hole 250 should be set higher than the oil level of the lubricating oil that the second accommodation cavity 230 can store, so as to reduce the risk of lubricating oil leaking from the pressure relief hole 250.

[0142] According to some embodiments of the present application, optionally, a first positioning portion 150 may be provided on the first hinge seat 100, a second positioning portion 240 may be provided on the second hinge seat 200, and the second positioning portion 240 can cooperate with the first positioning portion 150 to position the first hinge seat 100 and the second hinge seat 200 at the initial installation angle, and the connection between the first positioning portion 150 and the first hinge seat 100 and / or the connection between the second positioning portion 240 and the second hinge seat 200 can be released.

[0143] Among them, the initial installation angle is the positioning angle during the assembly process of the first hinge seat 100 and the second hinge seat 200. Generally, after the first hinge seat 100 and the second hinge seat 200 are assembled, the hinge assembly 10 will be connected to the opening and closing device. In order to facilitate the connection between the hinge assembly 10 and the door body 30 and the box body 20 of the opening and closing device, the angle between the first hinge seat 100 and the second hinge seat 200 that is convenient for the installation of the first hinge seat 100 and the door body 30 and the installation of the second hinge seat 200 and the box body 20 can be used as the initial installation angle. In this embodiment, when the door body 30 is in the closed state, the convenience of assembling the hinge seat and the opening and closing device is the best, and there is no torque between the first hinge seat 100 and the second hinge seat 200. Therefore, the state where the first clamping plate 120 of the first hinge seat 100 and the second sub-clamping plate 222 of the second hinge seat 200 are approximately 180 degrees can be used as the initial installation angle.

[0144] The first positioning portion 150 and the second positioning portion 240 cooperate to form a self-locking structure of the hinge assembly 10, so that the first hinge seat 100 and the second hinge seat 200 are temporarily fixed, the first hinge seat 100 cannot rotate relative to the second hinge seat 200, and the relative installation positions between the first hinge seat 100 and the second hinge seat 200 can be positioned, reducing the risk of incorrect installation of the first hinge seat 100 and the second hinge seat 200.

[0145] The connection between the first positioning portion 150 and the first hinge seat 100 can be released. It can be understood that the connection between the first positioning portion 150 and the first hinge seat 100 can be released, and this release of the connection can be a non-recoverable destructive connection or a detachable connection. Similarly, the connection between the second positioning portion 240 and the second hinge seat 200 can be released. It can be understood that the connection between the second positioning portion 240 and the second hinge seat 200 can be released, and this release of the connection can be a non-recoverable destructive connection or a detachable connection.

[0146] In a specific embodiment, one of the first positioning portion 150 and the second positioning portion 240 is a groove structure, and the other is a protrusion. Taking the first positioning portion 150 as the protrusion and the second positioning portion 240 as the groove as an example, when the hinge assembly 10 is assembled, the protrusion structure of the first hinge seat 100 is assembled into the groove structure of the second hinge seat 200 to prevent the hinge assembly 10 from rotating. At the same time, the root of the protrusion structure is made thinner. After the hinge assembly 10 is installed for the first time, as the door body 30 is opened, the above-mentioned protrusion structure is stuck in the groove structure, and then the protrusion structure breaks from the root to realize the circumferential limit separation between the first hinge seat 100 and the second hinge seat 200, realizing the rotation of the hinge assembly 10.

[0147] Further, the groove structure can also be designed with an inclined surface so that the fractured convex structure flows out of the groove structure along this inclined surface, preventing the convex structure from remaining on the hinge assembly 10.

[0148] According to some embodiments of the present application, optionally, a first guiding structure 320 extending along the direction X of the first axis can be provided on the outer peripheral wall of the second fitting 300. A second guiding structure extending along the direction X of the first axis can be provided in the second receiving cavity 230 of the second hinge seat 200. The first guiding structure 320 and the second guiding structure cooperate to relatively fix the second fitting 300 and the second hinge seat 200 in the circumferential direction of the second receiving cavity 230, and enable the second fitting 300 to move along the direction X of the first axis.

[0149] Specifically, the first guiding structure 320 and the second guiding structure can be a cooperation of a rib and a recessed groove. Specifically, in this embodiment, a recessed groove is provided on the outer peripheral wall of the second fitting 300, and a rib is provided on the inner wall of the second receiving cavity 230. The rib is disposed in the recessed groove, and the rib and the recessed groove can slide relative to each other in the direction X of the first axis. A plurality of ribs and recessed grooves can be provided in one-to-one correspondence, specifically 2-8. In this embodiment, four ribs and four recessed grooves are respectively provided. The four ribs are arranged equidistantly along the circumferential direction of the second receiving cavity 230, and the corresponding four recessed grooves are arranged equidistantly along the circumferential direction of the second fitting 300.

[0150] The first guiding structure 320 and the second guiding structure can enable the second fitting 300 to move along the telescopic direction of the elastic member 400 (i.e., the spring), that is, the direction X of the first axis, and can limit the rotation of the second fitting 300, so that the second fitting 300 can only slide along the compression and elongation direction of the elastic member 400 (i.e., the spring).

[0151] Optionally, in this embodiment, the first hinge seat 100, the second hinge seat 200, and the second fitting 300 are all made of hard plastic, specifically materials such as POM (POM, Polyformaldehyde, polyoxymethylene resin) and nylon, which are wear-resistant materials.

[0152] The hinge assembly 10 structure of this embodiment can be assembled through a connecting shaft 500. Specifically, through holes 510 are provided on the first hinge portion 110, the second hinge portion 210, the second fitting 300, and the elastic member 400. Among them, the through holes 510 can be coaxially arranged with the second accommodation cavity 230 and the first accommodation cavity 130; when the elastic member 400 is a spring, the through hole 510 of the elastic member 400 is also the internal space of the helix of the spring. The connecting shaft 500 sequentially passes through the first hinge portion 110 (including the first fitting 140), the second fitting 300 (including the second fitting structure 310), the elastic member 400, and the second hinge portion 210, fixing the first hinge seat 100, the second hinge seat 200, the elastic member 400, and the second hinge seat 200 into one body. The connecting shaft 500 can be fixed by riveting, or one end or both ends of the connecting shaft 500 can be fixedly connected by cooperating with nuts.

[0153] Further, a gasket 600 can be provided at one end of the first hinge portion 110 facing away from the second hinge portion 210. The connecting shaft 500 can pass through the gasket 600 and then be riveted or fixedly connected by cooperating with a nut.

[0154] A notch 610 can be provided at the edge of the gasket 600, and a protruding structure can be provided on the end surface of the first hinge portion 110 cooperating with the gasket 600. The protruding structure and the notch 610 are correspondingly matched to prevent the gasket 600 from rotating along with the first hinge seat 100.

[0155] It can be understood that a gasket 600 can also be provided at one end of the second hinge portion 210 facing away from the first hinge portion 110.

[0156] It should be noted that the height difference between the end of the fourth curved surface 312 away from the second mating surface 314 and the second mating surface 314 along the first axis direction X can achieve the adjustment of the hovering angle of the door body 30. Through test verification, it is found that when the height is 2.2 mm, the lowest door body 30 can hover at 30°. In some embodiments, the height difference between the end of the fourth curved surface 312 away from the second mating surface 314 and the second mating surface 314 along the first axis direction X can be designed between 1.5 - 3.5 millimeters, preferably 2.2 millimeters.

[0157] Some embodiments of the present application also provide an opening and closing device, including a box body 20 and a door body 30. One end of the box body 20 has an opening 206. The door body 30 is hinged to the opening 206 of the box body 20 through the hinge assembly 10 proposed by the present application or any embodiment of the present application, and the first rotation direction is the same as the rotation direction when the door body 30 is opened.

[0158] Among them, the opening and closing device can be a refrigerator, specifically a bedroom refrigerator with an upward-opening door. The opening and closing device can also be other devices that can be opened and closed, such as dishwashers, storage lockers, etc. Among them, when the opening and closing device is a bedroom refrigerator, the refrigerator also includes a control component for controlling refrigeration, etc. The first hinge seat 100 is the upper seat connected to the door body 30, and the second hinge seat 200 is the lower seat connected to the box body 20 (i.e., the cabinet body). The hinge assembly 10 can make the product close the door more reliably, reduce the risk of flash seams, and reduce the waste of the cold quantity of the refrigerator.

[0159] The following uses two embodiments to introduce two structures of the opening and closing device.

[0160] Embodiment 1

[0161] As Figure 20 and Figure 21 shown, in a specific implementation, a mounting cavity 204 recessed toward the inside of the box body 20 is provided on the outer side wall of the box body 20. The mounting cavity 204 is provided with a third opening 202 facing the opening 206 and a fourth opening 203 facing the outside of the box body 20. A clamping groove 105 is provided on one side of the mounting cavity 204 away from the third opening 202; the door body 30 is pivotally connected to the opening 206 of the box body 20 through the hinge assembly 10. The hinge assembly 10 includes a second hinge seat 200 and a first hinge seat 100 that are rotatably connected. The first hinge seat 100 is connected to the side wall of the door body 30. The hinge ends of the second hinge seat 200 and the first hinge seat 100 are both arranged in the mounting cavity 204. A first sub-clamping plate 221 and a second sub-clamping plate 222 are provided on the side of the hinge end of the second hinge seat 200 facing away from the first hinge seat 100. The first sub-clamping plate 221 is embedded in the clamping groove 105, and the second sub-clamping plate 222 is connected to the outer side wall of the door body 30.

[0162] For the opening and closing device provided by the embodiment of the present application, since the hinge assembly 10 for connecting the door body 30 and the box body 20 includes a second hinge seat 200 and a first hinge seat 100 that are rotatably connected, the first hinge seat 100 among them is connected to the outer surface of the door body 30, and the hinge ends of the second hinge seat 200 and the first hinge seat 100 are both arranged in the mounting cavity 204. Since the mounting cavity 204 is recessed from the outer side wall of the box body 20 toward the inside of the box body 20, the size of the hinge assembly 10 protruding from the outside of the box body 20 can be reduced to a certain extent, so as to reduce the gap between the packaging box for the packaging device and the device, improve the packing quantity of the product, reduce the freight of the product, and have good practicability.

[0163] The box body 20 may be provided with only one opening or multiple openings. In the case of multiple openings, multiple door bodies 30 may also be provided. Some door bodies 30 may be connected to the corresponding openings of the box body 20 using the above-mentioned assembly method. For the door bodies 30 that do not affect the packing volume, the assembly method in the relevant technology may also be used, which is not limited here.

[0164] The opening of the freezer is usually opened at the top of the product. If the opening is set at other parts, it can be adjusted accordingly. I will not go into details here.

[0165] The first hinge seat 100 may include a first clamping plate 120, on which two first mounting holes 121 may be provided, and the first mounting holes 121 may be bolt holes. The first clamping plate 120 is connected to the door body 30 by bolts provided in the corresponding first mounting holes 121, so as to realize the assembly of the first hinge seat 100 with the door body 30.

[0166] The first mounting holes 121 of the embodiment of the present application can be arranged at intervals along the vertical direction, and only two bolts are needed to assemble the first clamping plate 120 to the door body 30. In other embodiments, the first mounting holes 121 can also be arranged at intervals along the horizontal direction, or more first mounting holes 121 can be provided, which is not limited here.

[0167] Combination Figure 1 、 Figure 3 and Figure 7 , the hinged end of the first hinged seat 100 can be cylindrical, and it is integrally formed with the first clamping plate 120. The side of the first clamping plate 120 facing the door body 30 is a plane, and the side of the first clamping plate 120 away from the door body 30 can be provided with a plurality of reinforcing ribs 160. The reinforcing ribs 160 can be arranged vertically, and the reinforcing ribs 160 can extend from the first clamping plate 120 to the circumference of the hinged end of the first hinged seat 100 to improve the strength of the first hinged seat 100 and improve the service life of the first hinged seat 100.

[0168] The hinged end of the first hinge seat 100 is provided with a first accommodating cavity 130, which can be provided in a cylindrical shape, and an opening, namely a second opening, is provided at one axial end of the first accommodating cavity 130 facing the second hinge seat 200.

[0169] The articulated end of the second articulated seat 200 can also be cylindrical. The first sub-card plate 221 and the second sub-card plate 222 can be oppositely arranged on both sides of the articulated end of the second articulated seat 200, and the first sub-card plate 221 and the second sub-card plate 222 can be integrally formed with the articulated end of the second articulated seat 200. The vertical dimension of the second sub-card plate 222 can be greater than that of the first sub-card plate 221 to facilitate the assembly of the first sub-card plate 221 and the second sub-card plate 222 on the installation cavity 204. Two second installation holes 223 are provided on the second sub-card plate 222. The second installation holes 223 can be bolt holes. The second sub-card plate 222 is connected to the outer side surface of the box body 20 through bolts arranged in the corresponding second installation holes 223. The second installation holes 223 can be oval-shaped, so as to facilitate the adjustment of the installation position of the second articulated seat 200 and facilitate the assembly of the hinge assembly 10 on the opening and closing device.

[0170] In the embodiment of the present application, the second installation holes 223 can be arranged at intervals in the horizontal direction, and only two bolts are required to assemble and connect the second sub-card plate 222 to the box body 20. In other implementation schemes, the second installation holes 223 can also be arranged at intervals in the horizontal direction, and more second installation holes 223 can also be provided, which are not limited herein.

[0171] It should be noted that the first installation hole 121 and the second installation hole 223 in the embodiment of the present application are both counterbore holes to prevent the corresponding bolts from protruding from the surface and affecting the packing quantity of the product.

[0172] A plurality of reinforcing ribs 160 are provided on the side of the second sub-card plate 222 facing away from the first sub-card plate 221 (i.e., the outer side of the second sub-card plate 222). The reinforcing ribs 160 can be arranged vertically, and the reinforcing ribs 160 can extend from the second sub-card plate 222 to the circumferential surface of the articulated end of the second articulated seat 200 to improve the strength of the second articulated seat 200 and extend the service life of the second articulated seat 200.

[0173] The articulated end of the second articulated seat 200 is provided with a second accommodation cavity 230. The second accommodation cavity 230 can be arranged in a cylindrical shape. The axial end of the second accommodation cavity 230 facing the first articulated seat 100 is open, that is, a first opening is provided. The first accommodation cavity 130 and the second accommodation cavity 230 are oppositely arranged, and the opposite ends of the two are open, and the opposite ends of the two abut against both ends of the card groove 105 respectively.

[0174] Embodiment 2

[0175] As Figures 1 to 19 shown, the main difference between Embodiment 1 and Embodiment 2 is that the connection structures of the hinge assembly 10 corresponding to the box body 20 and the door body 30 are different.

[0176] Specifically, the first clamping plate 120 can be provided with three first mounting holes 121. Among them, two first mounting holes 121 are arranged at intervals and aligned along the direction X of the first axis, and the other first mounting hole 121 is arranged on the side of the two first mounting holes 121 close to the second sub-clamping plate 222. That is, the three first mounting holes 121 can be arranged in a triangle in sequence.

[0177] The door body 30 is provided with clamping grooves 207 at both ends of the clamping groove 105. The end face of the second hinge portion 210 facing away from the first hinge seat 100 protrudes with a protruding strip 211, and the clamping grooves 207 are provided at both ends of the clamping groove 105. The first hinge seat 100 and the second hinge seat 200 are arranged in the installation cavity 204, and the protruding strip 211 is inserted into the clamping groove 207 at the corresponding end. The cooperation between the clamping groove 207 and the protruding strip 211 realizes the embedded fixation of the first sub-clamping plate 221 and the box body 20.

[0178] Furthermore, the end face of the second hinge portion 210 facing away from the first hinge seat 100 is provided with an extension portion 212 integrally formed with the protruding strip 211. During the rotation of the first hinge seat 100 relative to the second hinge seat 200, in this embodiment, the torque between the second hinge seat 200 and the box body 20 is mainly concentrated on the side wall of the protruding strip 211 and the clamping groove 207. Therefore, the protruding strip 211 is easily damaged due to stress concentration. By providing the extension portion 212, it is equivalent to extending the length of the protruding strip 211, and accordingly, the strength of the protruding strip 211 is enhanced. In actual tests, it is found that the possibility of the protruding strip 211 being damaged is greatly reduced.

[0179] It should be noted that a protruding strip 211 can also be provided on the end face of the end of the first hinge portion 110 facing away from the second hinge portion 210, and the protruding strip 211 can also cooperate with the clamping groove 207 at the corresponding end.

[0180] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hinge assembly, applied to an opening and closing device of a top-opening door, characterized in that: include: a first matching piece, wherein one end of the first matching piece is provided with a first curved surface and a second curved surface, A second matching piece, wherein a third curved surface and a fourth curved surface are provided at one end of the second matching piece; A first hinge seat, wherein the first hinge seat is connected to the first matching piece, and the first hinge seat and the first matching piece rotate synchronously; A second hinged seat, the second hinged seat is connected to the second matching piece, and the second hinged seat and the second matching piece rotate synchronously; an elastic member, located at a side of the second fitting member away from the first fitting member, the elastic member being used to apply an axial force to the second fitting member and the first fitting member; A connecting shaft, the connecting shaft passes through the first hinge seat, the first matching piece, the second matching piece, the elastic piece and the second hinge seat, so that the first hinge seat and the second hinge seat are relatively fixed in the direction of the first axis; The first hinge seat is used to connect with the door body of the opening and closing device, the second hinge seat is used to connect with the box body of the opening and closing device, the first hinge seat is rotatably connected with the second hinge seat, and the second matching piece is slidably connected with the second hinge seat along the direction of the first axis, wherein the first axis is arranged parallel to the opening of the box body of the opening and closing device; The first matching piece and the second matching piece have a first posture and a second posture, the first matching piece and the second matching piece can rotate relative to each other around the first axis to switch between the first posture and the second posture, and in the first posture, the first curved surface and the third curved surface are in abutment with each other, so that the first matching piece has a first force opposite to the direction of gravity under the action of the axial force; In the second posture, the second curved surface abuts against the fourth curved surface, so that the first mating piece has a second force in the same direction as the gravity under the action of the axial force, and the opening angle of the door body in the first posture is greater than the opening angle in the second posture. In the first posture, the door body can hover, and when the door body is in the closed state, the first mating piece and the second mating piece are in the second posture.

2. The hinge assembly according to claim 1, characterized in that: The first curved surface, the second curved surface, the third curved surface and the fourth curved surface are helical surfaces, the first curved surface and the second curved surface have opposite hand directions, the third curved surface and the fourth curved surface have opposite hand directions, the first curved surface and the third curved surface have the same hand direction, and the second curved surface and the fourth curved surface have the same hand direction.

3. The hinge assembly according to claim 2, characterized in that: The first curved surface, the second curved surface, the third curved surface and the fourth curved surface all extend spirally along the direction of the first axis.

4. The hinge assembly according to claim 1, characterized in that: The first curved surface and the second curved surface are sequentially arranged along the circumference of the first matching piece, the third curved surface and the fourth curved surface are sequentially arranged along the circumference of the second matching piece, and the circumference of the first matching piece and the circumference of the second matching piece are both perpendicular to the direction of the first axis.

5. The hinge assembly according to claim 4, characterized in that: The first matching piece also has a first matching surface, and the first matching surface is arranged between the first curved surface and the second curved surface; The second matching piece further has a second matching surface, and the second matching surface is arranged between the third curved surface and the fourth curved surface; The first mating surface and the second mating surface are both perpendicular to the direction of the first axis, and the first mating piece and the second mating piece have a third posture between the first posture and the second posture. In the third posture, the first mating surface and the second mating surface are abutted and mated.

6. The hinge assembly according to claim 5, characterized in that: The first curved surface and the second curved surface are both arranged on a side of the first mating surface away from the second mating piece, and the third curved surface and the fourth curved surface are both arranged on a side of the second mating surface away from the first mating piece.

7. The hinge assembly according to claim 5, characterized in that: The first matching piece further has a stop surface, and the stop surface is connected to an end of the second curved surface away from the first matching surface; And / or, the second matching piece further has a stop surface, and the stop surface is connected to an end of the fourth curved surface away from the second matching surface.

8. The hinge assembly according to any one of claims 1 to 7, characterized in that: The first matching piece includes a plurality of first protrusions arranged at intervals along the circumference of the first matching piece, and each of the first protrusions is provided with the first curved surface and the second curved surface; The second matching piece includes a plurality of second protrusions arranged at intervals along the circumference of the second matching piece, each of the second protrusions is provided with the third curved surface and the fourth curved surface, and the plurality of first protrusions are arranged in one-to-one correspondence with the plurality of second protrusions; The circumferential direction of the first matching piece and the circumferential direction of the second matching piece are both perpendicular to the direction of the first axis.

9. The hinge assembly according to any one of claims 1 to 7, characterized in that: The first curved surface and / or the second curved surface and / or the third curved surface and / or the fourth curved surface are provided with an oil storage tank.

10. The hinge assembly according to any one of claims 1 to 7, characterized in that: The first hinge seat is provided with a first accommodating cavity extending along the direction of the first axis, and the second hinge seat is provided with a second accommodating cavity extending along the direction of the first axis. The first accommodating cavity is communicated with the second accommodating cavity, and the first matching piece is arranged in the first accommodating cavity, and the second matching piece is arranged in the second accommodating cavity.

11. The hinge assembly according to claim 10, characterized in that: The first hinge seat and the first matching piece are integrally constructed, and the second matching piece can slide in the second accommodating cavity along the direction of the first axis.

12. The hinge assembly according to claim 11, characterized in that: The elastic member is arranged in the second accommodating cavity.

13. The hinge assembly according to claim 10, characterized in that: The first hinge seat includes a first clamping plate and a first hinge part, the first clamping plate and the first hinge part are integrally constructed, and the first accommodating cavity is arranged in the first hinge part; The second hinge seat comprises a second clamping plate and a second hinge part, the second clamping plate and the second hinge part are integrally constructed, and the second accommodating cavity is arranged in the second hinge part; The first hinged portion is rotatably connected to the second hinged portion.

14. The hinge assembly according to claim 13, characterized in that: A pressure relief hole is provided at one end of the first hinged portion away from the second hinged portion, and the pressure relief hole is communicated with the first accommodating cavity; And / or, a pressure relief hole is provided at one end of the second hinged portion away from the first hinged portion, and the pressure relief hole is communicated with the second accommodating cavity.

15. The hinge assembly according to any one of claims 1 to 7, characterized in that: A first positioning portion is provided on the first articulated seat, and a second positioning portion is provided on the second articulated seat. The second positioning portion and the first positioning portion can cooperate with each other to position the first articulated seat and the second articulated seat at an initial installation angle, and the connection between the first positioning portion and the first articulated seat and / or between the second positioning portion and the second articulated seat can be released.

16. An opening and closing device, characterized in that: include: A box body having an opening at the top; A door body is hinged at the opening of the box body through the hinge assembly described in any one of claims 1-15.

17. The opening and closing device according to claim 16, characterized in that: The opening and closing device is a refrigerator.

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