Opening and closing device

Abstract

The application belongs to the technical field of household appliances, and particularly relates to an opening and closing device, which comprises a box body provided with an opening at the top end in the height direction of the box body; a door body pivotally connected with the box body through a hinge assembly to open or close the opening; one side of the box body is provided with a reference surface, the door body is provided with a side surface on the same side as the reference surface, and at least one of the reference surface and the side surface is formed with an inwardly recessed mounting cavity, and at least part of the hinge assembly is arranged in the mounting cavity; wherein, when the door body covers the opening, the reference surface and the side surface are flush arranged along a first direction perpendicular to the reference surface; in the process of rotating the door body to the maximum opening angle relative to the box body, the maximum distance of the door body beyond the reference surface along the first direction is an over-box amount L, and the over-box amount L satisfies the following condition: 0 < L <= 20 mm. The application can reduce the possibility of scratching the wall surface by the door body in the opening process, realize wall placement, and improve the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and more specifically, relates to an opening and closing device. Background Art

[0002] Household appliances, such as refrigerators, freezers, dishwashers, disinfection cabinets and the like, generally comprise a cabinet body and a door body that can open and close up and down relative to the cabinet body. During the opening or closing process of the door body, the distance between the door body and the back face of the cabinet body is relatively large, generally 50mm or more, which makes it impossible to place the appliance against a wall. If the distance between the household appliance and the wall surface of the wall is reduced, the door body cannot be fully opened, and the door body is prone to scraping against the wall surface during the opening process, which affects the user's use experience. Summary of the Invention

[0003] An objective of the present application is to provide an opening and closing device, which enables the door body to have a relatively small distance extending beyond the back face of the cabinet body during the process of opening and closing the door body, so as to realize wall-mounted placement, while reducing the possibility of the door body scraping against the wall surface during the opening process, and improving the user's use experience.

[0004] To this end, the present application proposes an opening and closing device, comprising: a cabinet body, the top end of which along its own height direction is provided with an opening; a door body, which is pivotally connected to the cabinet body through a hinge assembly to open or close the opening. One side of the cabinet body is provided with a reference surface, the door body is provided with a side surface arranged on the same side as the reference surface, at least one of the reference surface and the side surface is formed with an inwardly recessed mounting cavity, and at least part of the hinge assembly is arranged in the mounting cavity; wherein when the door body covers the opening, the reference surface and the side surface are arranged flush in a first direction perpendicular to the reference surface; during the process that the door body rotates relative to the cabinet body to the maximum opening angle, the maximum distance by which the door body extends beyond the reference surface along the first direction is an over-cabinet amount L, and the over-cabinet amount L satisfies the following condition: 0<L≤20mm.

[0005] In the opening and closing device provided according to the embodiment of the present application, by forming the inwardly recessed mounting cavity in at least one of the side surface of the door body and the reference surface of the cabinet body, and arranging at least part of the hinge assembly in the mounting cavity, during the process that the door body rotates relative to the cabinet body to the maximum opening angle, in the direction perpendicular to the reference surface, the maximum distance by which the door body extends beyond the reference surface is the over-cabinet amount L, and the over-cabinet amount L satisfies the following condition: 0<L≤20mm. Compared with the related art where the over-cabinet amount is 50mm or more, since the distance by which the door body extends beyond the reference surface of the cabinet body during the process of opening and closing the door body is relatively small, wall-mounted placement can be realized, while the possibility of the door body scraping against the wall surface during the opening process is reduced, and the user's use experience is improved.

[0006] In addition, the opening and closing device according to the present application may also have the following additional technical features:

[0007] In some embodiments of this application, the door body further has a top surface and a bottom surface, with the bottom surface facing the opening and the top surface parallel to the bottom surface. Side surfaces are connected to the top and bottom surfaces respectively. The distance between the pivot axis of the hinge assembly and the side surface is d, and the distance between the pivot axis of the hinge assembly and the top surface is h. During the process of the door body rotating relative to the housing to the maximum opening angle, the overhang is greatest when the intersection line of the top surface and the side surface is on the same horizontal plane as the pivot axis of the hinge assembly.

[0008] In some embodiments of this application, a portion of the hinge assembly is located within the mounting cavity, and the other portion protrudes outward from the reference surface along a first direction by a maximum distance S, which satisfies the following conditions: L≥S and S≤10mm.

[0009] In some embodiments of this application, the maximum opening angle θ of the door relative to the box body satisfies the following condition: 80° < θ ≤ 90°.

[0010] In some embodiments of this application, the mounting cavity includes a first cavity and a second cavity. The first cavity is formed on one side of the reference plane at the opening end of the housing, and the second cavity is formed on one side of the door. The pivot axis of the hinge assembly is located in the second cavity.

[0011] In some embodiments of this application, the hinge assembly includes a first hinge member, a second hinge member, a rotating shaft, and a spring-loaded assembly. A portion of the first hinge member is disposed in a first cavity and connected to a housing, and another portion of the first hinge member is disposed in a second cavity. The second hinge member is disposed in the second cavity and connected to a door. The second hinge member is pivotally connected to the first hinge member via the rotating shaft, and the spring-loaded assembly is configured to generate a spring force that drives the door to rotate relative to the housing.

[0012] In some embodiments of this application, the hinge assembly further includes a swing shaft, which is slidably connected to the first hinge member and rotatably connected to the second hinge member. The second hinge member drives the door to rotate within a preset angle range via the swing shaft. One end of the rebound assembly is connected to the swing shaft, and the other end of the rebound assembly is connected to the end of the first hinge member away from the rotation shaft.

[0013] In some embodiments of this application, in a first direction, the rotation axis is positioned closer to the second cavity than the swing axis, and the spring-loaded assembly is in a stretched state connected between the swing axis and the end of the first hinge that is away from the rotation axis.

[0014] In some embodiments of this application, during the process of the door rotating relative to the box to the maximum opening angle, the rotating shaft moves in the second cavity in a direction away from the side, and the center distance between the rotating shaft and the swing shaft remains unchanged.

[0015] In some embodiments of this application, the portion of the first hinge member located within the second cavity is arranged side-by-side with the second hinge member; or, the portion of the first hinge member located within the second cavity is arranged in a straight line with the second hinge member.

[0016] In some embodiments of this application, the minimum distance h1 between the top wall of the second cavity and the top surface of the door is ≥10mm; or, the door is provided with a glass panel, the minimum distance h1 between the top wall of the second cavity and the top surface is equal to the thickness of the glass panel, and h1 ≥2mm.

[0017] In some embodiments of this application, the thickness of the door body is T, and the distance h between the pivot axis of the hinge assembly and the top surface of the door body satisfies the following conditions: h < 0.5 * T; and / or, the distance between the bottom wall of the second cavity and the center line of the rotation axis is H1, the maximum distance between the upper end face of the first hinge member and the center line of the rotation axis is H2, and H1 > H2; and / or, the distance between the top wall of the second cavity and the center line of the rotation axis is H3, the maximum distance between the side wall of the first hinge member protruding outward relative to the reference surface and the center line of the rotation axis is H4, and H3 > H4.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0021] Figure 1 This is a schematic diagram of the structure of an opening and closing device according to an embodiment of this application;

[0022] Figure 2 for Figure 1 A magnified schematic diagram of region M in the opening and closing device shown;

[0023] Figure 3This is a partial structural schematic diagram of the opening and closing device according to another embodiment of this application;

[0024] Figure 4 for Figure 1 A schematic diagram of the hinge assembly in the opening and closing device shown;

[0025] Figure 5 for Figure 4 A cross-sectional view of the hinge assembly in the diagram;

[0026] Figure 6 This is a partial structural schematic diagram of the opening and closing device according to another embodiment of this application;

[0027] Figure 7 for Figure 6 A schematic diagram of the structure of a hinge assembly of the opening and closing device shown;

[0028] Figure 8 This is a structural schematic diagram of a hinge assembly in related technologies;

[0029] Figure 9 for Figure 6 A schematic diagram of another hinge assembly of the opening and closing device shown;

[0030] Figure 10 for Figure 7 The diagram shows a simplified representation of the structure of the opening and closing device, where the door rotates relative to the housing. Detailed Implementation

[0031] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0032] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude 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 construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0033] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0034] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0035] In related technologies, household appliances such as refrigerators, freezers, dishwashers, and disinfection cabinets typically include a cabinet body and a door that can open and close relative to the cabinet body. Because the distance between the door and the back of the cabinet body is relatively large during opening or closing, generally more than 50mm, it is impossible to place the appliance flush against the wall. If the distance between the appliance and the wall is reduced, the door cannot open fully, and the door is prone to scraping against the wall, affecting the user experience.

[0036] Therefore, this application provides an opening and closing device that minimizes the distance the door extends beyond the back of the housing during the opening and closing process, reducing the possibility of the door scraping against the wall during opening, enabling it to be placed close to the wall, and improving the user experience.

[0037] Figure 1 This is a schematic diagram of the opening and closing device according to an embodiment of this application. Figure 2 for Figure 1 A magnified schematic diagram of region M in the opening and closing device shown.

[0038] See Figure 1 and Figure 2This application provides an opening and closing device 100, which can be a household appliance such as a refrigerator, freezer, dishwasher, or disinfection cabinet, and is placed on a wall W close to the wall. The opening and closing device 100 includes a housing 1, a door 2, and a hinge assembly 3.

[0039] The housing 1 has an opening 11 at its top along its height. The door 2 is pivotally connected to the housing 1 via a hinge assembly 3 to open or close the opening 11. The housing 1 has a reference surface 12 on one side, and the door 2 has a side surface 22 on the same side as the reference surface 12. At least one of the reference surface 12 and the side surface 22 forms an inwardly recessed mounting cavity, and at least a portion of the hinge assembly 3 is disposed within the mounting cavity.

[0040] When the door 2 closes to the opening 11, the reference surface 12 and the side surface 22 are flush along the first direction X perpendicular to the reference surface 12; during the process of the door 2 rotating relative to the housing 1 to the maximum opening angle, the maximum distance by which the door 2 extends beyond the reference surface 12 along the first direction X is the over-cabinet amount L, which satisfies the following condition: 0 <L≤20mm。

[0041] In this embodiment, the housing 1 may have only one opening 11 or multiple openings 11. The openings 11 are usually located at the top of the housing 1. When multiple openings 11 are provided, multiple doors 2 may also be provided. At least some of the doors 2 may be pivotally connected to the housing 1 by hinge assemblies 3 to open or close the corresponding openings 11. At least one of the reference surface 12 of the housing 1 and the side surface 22 of the door 2 forms an inwardly recessed mounting cavity. The hinge assembly 3 may be completely hidden in the mounting cavity or partially hidden in the mounting cavity, thereby minimizing the distance that the hinge assembly 3 protrudes outward from the reference surface 12, which is beneficial for wall-mounted placement.

[0042] Figure 1 and Figure 2The solid line indicates that the opening / closing device 100 is in the closed state, while the dashed line indicates that the door 2 is rotated clockwise relative to the housing 1 at a certain angle, so that the opening / closing device 100 is in a partially open state. The door 2 covers the opening 11 of the housing 1. At this time, the reference surface 12 and the side surface 22 are flush with each other along the first direction X, which can improve the aesthetics of the opening / closing device 100 and reduce the distance between the door 2 and the wall W. Since a skirting board W1 is generally installed at the junction of the wall W and the floor in interior decoration projects, and the wall thickness of the skirting board W1 is generally 10mm, the reference surface 12 of the housing 1 is fitted with the skirting board W1. Considering the assembly error between the opening / closing device 100 and the floor, the gap between the side surface 22 of the door 2 and the wall W is ≥10mm. During the process of the door 2 rotating relative to the housing 1 to the maximum opening angle, the door 2 will extend beyond the reference plane 12 by a certain distance along the first direction X. The maximum distance that the door 2 extends beyond the reference plane 12 along the first direction X is defined as the over-cabinet amount L. The over-cabinet amount L is limited to ≤20mm, which can minimize the gap between the side 22 of the door 2 and the wall surface W of the wall, and at the same time reduce the possibility of the door 2 scraping against the wall surface W during the opening process.

[0043] Based on the boundary conditions of the oversize L, the thickness of the door body 2, the groove size of the mounting cavity, and the structure of the hinge assembly 3 can be designed. Since the distance of the door body 2 from the reference plane 12 of the box body 1 is as small as possible during the opening and closing process, compared with the oversize of more than 50mm in related technologies, the embodiment of this application can enable the opening and closing device 100 to be placed against the wall, while reducing the possibility of the door body 2 scraping against the wall W during the opening process, thus improving the user experience.

[0044] In some embodiments, the door 2 further has a top surface 21 and a bottom surface 23, the bottom surface 23 facing the opening 11, the top surface 21 parallel to the bottom surface 23, and the side surface 22 connected to the top surface 21 and the bottom surface 23 respectively; the distance between the pivot axis of the hinge assembly 3 and the side surface 22 is d, and the distance between the pivot axis of the hinge assembly 3 and the top surface 21 is h. During the process of the door 2 rotating relative to the housing 1 to the maximum opening angle, when the intersection line of the top surface 21 and the side surface 22 is on the same horizontal plane as the pivot axis of the hinge assembly 3, the over-cabin amount is the largest, and the over-cabin amount...

[0045] See Figure 2At least one of the reference surface 12 and the side surface 22 forms an inwardly recessed mounting cavity, and the pivot axis of the hinge assembly 3 can be located at any position within the mounting cavity. Taking a vertical plane perpendicular to the pivot axis of the hinge assembly 3 as a reference plane, the orthographic projection of the pivot axis of the hinge assembly 3 onto the reference plane is point O. The orthographic projection of the intersection line of the top surface 21 and the side surface 22 of the door body 2 onto the reference plane is point A, and the orthographic projection of the intersection line of the bottom surface 23 and the side surface 22 of the door body 2 onto the reference plane is point B. When external factors (such as limitations on the groove size of the mounting cavity) are not considered, when point O is located at any position on the top surface 21 of the door body 2, the overhang of the door body 2 during rotation is 0 mm. As point O moves downwards and away from the top surface 21, the rotation radius of point A increases, and the maximum overhang increases. When point O is located on the side surface 22 of the door body 2, the overhang of the door body 2 is equal to the distance between point O and point A. As point O moves to the left, the maximum overhang decreases.

[0046] During the rotation of door 2 relative to box 1, point A will rotate around point O with the length between OA as the radius. Figure 2 The dotted arc motion in the diagram: when the door 2 rotates to the position shown by the dotted line, point A reaches point A' and point B reaches point B'. At this time, the over-cabin amount L is the distance between point A' and the reference surface 12 of the box 1. It can be seen that as the rotation angle of the door 2 increases, the over-cabin amount L gradually increases. When the line connecting point O and point A is a horizontal line, that is, when the intersection line of the top surface 21 and the side surface 22 is on the same horizontal plane as the pivot axis of the hinge assembly 3, the over-cabin amount L is the largest, and then the over-cabin amount L gradually decreases.

[0047] Assuming the distance between the pivot axis of hinge assembly 3 and the side surface 22 is d, and the distance between the pivot axis of hinge assembly 3 and the top surface 21 is h, the oversize L can be calculated according to the Pythagorean theorem. For example, if the distance between the pivot axis and the top surface 21 is h = 25.6 mm, and the distance between the pivot axis and the side surface 22 is d = 11.1 mm, then the oversize L ≤ 16.8 mm.

[0048] Figure 3 This is a partial structural schematic diagram of an opening and closing device according to another embodiment of this application.

[0049] In some embodiments, a portion of the hinge assembly 3 is located within the mounting cavity, and the other portion protrudes outward from the reference surface 12 along the first direction X by a maximum distance S. The mounting distance S satisfies the following conditions: L≥S and S≤10mm.

[0050] Without affecting the thermal insulation performance of the foam layer of the door body 2, the hinge assembly 3 can be completely hidden within the first cavity 13 and the second cavity 22, or it can be partially hidden within the first cavity 13 and the second cavity 22. (See reference...) Figure 3For example, a portion of the hinge assembly 3 is located within the mounting cavity, and another portion protrudes from the reference surface 12. The maximum distance by which the hinge assembly 3 protrudes from the reference surface 12 along the first direction X is the mounting distance S, which is optionally ≤ 10 mm.

[0051] For example, the groove depth of the mounting cavity along the first direction X is 20mm, the thickness of the hinge assembly 3 is 25mm, and the mounting distance S of the hinge assembly 3 protruding outward relative to the reference surface 12 is 8mm. This can reduce the gap between the packaging box of the opening and closing device 100 and the opening and closing device 100, thereby increasing the packing volume of the opening and closing device 100 during transportation and reducing the product's freight costs. Since the overpacking volume L is related to the rotation angle of the door body 2, and the mounting distance S of the hinge assembly 3 protruding outward relative to the reference surface 12 is a fixed value, as long as L≥S can be guaranteed, it can be ensured that the door body 2 will never collide or rub against the wall during the process of rotating to the maximum opening angle, thus achieving wall-hugging placement as much as possible.

[0052] In some embodiments, the maximum opening angle θ of the door 2 relative to the housing 1 satisfies the following condition: 80° < θ ≤ 90°.

[0053] The larger the maximum opening angle θ of the door 2 relative to the box 1, the better it meets the user's convenience requirements. When the rotation angle of the door 2 relative to the box 1 reaches 90°, the door 2 is fully opened, and the top surface 21 of the door 2 is parallel to the wall surface W, ensuring that the door 2 does not rub against the wall surface W at the maximum opening angle.

[0054] In some embodiments, the mounting cavity includes a first cavity 10 and a second cavity 20. One end of the opening 11 of the housing 1 forms the first cavity 10 on one side of the reference plane 12, and the side 22 of the door 2 forms the second cavity 20. The pivot axis of the hinge assembly 3 is located in the second cavity 20.

[0055] As previously mentioned, the pivot axis of the hinge assembly 3 can be located at any position within the mounting cavity. Exemplarily, the reference surface 12 and the side surface 22 together form an inwardly recessed mounting cavity to accommodate the hinge assembly 3. Specifically, one end of the opening 11 of the housing 1 forms a first cavity 10 on one side of the reference surface 12, and a second cavity 20 is formed on one side of the side surface 22 of the door body 2. When the pivot axis of the hinge assembly 3 is located within the second cavity 20, the pivot axis is closer to the top surface 21 of the door body 2, allowing for a smaller oversize L.

[0056] Optionally, the over-box amount L satisfies the following condition: 0<L≤10mm. In this case, the reference surface 12 of the box body 1 is arranged to be completely attached to the skirting line W1, the assembly error between the opening and closing device 100 and the ground is small, the maximum gap between the side surface 22 of the door body 2 and the wall surface W of the wall is 10mm, and during the process that the door body 2 rotates to the maximum opening angle relative to the box body 1, the over-box amount L of the door body 2 does not exceed the maximum gap between the side surface 22 of the door body 2 and the wall surface W of the wall, so that wall-mounted placement can be realized.

[0057] Exemplarily, the thickness of the door body 2 is 50mm to 55mm, the width dimension of the door body 2 is 430mm to 550mm, and the pivot axis of the hinge assembly 3 is located in the second cavity 20 of the door body 2. Assuming that the distance h between the pivot axis of the hinge assembly 3 and the top surface 21 is 16mm, and the distance d between the pivot axis and the side surface 22 is 10.6mm, the over-box amount L=8.6mm, which meets the requirement that the over-box amount L is less than or equal to 10mm.

[0058] In the opening and closing device 100 according to the embodiments of the present application, the first cavity 10 is provided by grooving on the box body 1 and the second cavity 20 is provided by grooving on the door body 2 to accommodate at least part of the structure of the hinge assembly 3, so that the over-box amount L can be reduced. In addition, there are many structural forms of the hinge assembly 3, and the over-box amount L can be further reduced by changing the structure of the hinge assembly 3 itself or reducing the overall thickness of the hinge assembly 3. The specific structure of the exemplary hinge assembly 3 will be described in detail below with reference to the accompanying drawings.

[0059] Figure 4 is Figure 1 a schematic structural view of the hinge assembly in the opening and closing device shown, Figure 5 is Figure 4 a cross-sectional view of the hinge assembly in

[0060] In some embodiments, the hinge assembly 3 includes a first hinge member 31, a second hinge member 32, a rotating shaft 33 and a rebound assembly 34. A part of the first hinge member 31 is disposed in the first cavity 10 and connected to the box body 1, the other part of the first hinge member 31 is disposed in the second cavity 20, and the second hinge member 32 is disposed in the second cavity 20 and connected to the door body 2; the second hinge member 32 is pivotally connected to the first hinge member 31 through the rotating shaft 33, and the rebound assembly 34 is configured to generate an elastic force that drives the door body 2 to rotate relative to the box body 1.

[0061] Refer to Figure 4 and Figure 5This illustration shows the structure of a hinge assembly 3 of an opening and closing device 100 according to an embodiment of this application. The hinge assembly 3 includes a first hinge member 31, a second hinge member 32, a rotating shaft 33, and a spring-loaded assembly 34. The first hinge member 31 and the second hinge member 32 are respectively bushing-type structures. The first hinge member 31 includes a first bushing and a first mounting plate connected to each other. The second hinge member 32 includes a second bushing and a second mounting plate connected to each other. The first mounting plate is disposed within a first cavity 10 and connected to a housing 1. The first bushing is disposed within a second cavity 20. Both the second bushing and the second mounting plate are disposed within the second cavity 20, and the second mounting plate is used to connect to a door 2. The rotating shaft 33 passes through the first bushing and the second bushing, allowing the second hinge member 32 to be pivotally connected to the first hinge member 31 via the rotating shaft 33.

[0062] The rebound assembly 34 may include an elastic element, a torsion element, and a stop element. The elastic element is placed laterally and can be a torsion spring or a compression spring. Specifically, the elastic element is sleeved on the outer periphery of the rotating shaft 33 and located inside the first bushing, with one end of the elastic element connected to the torsion element. The torsion element and the second bushing can slide together via a curved surface. The stop element is located inside the first bushing. When the door body 2 drives the second hinge 32 to rotate, the second bushing slides relative to the torsion element. When the door body 2 rotates to the maximum opening angle, the first bushing and the second bushing contact each other through the stop element, stopping the rotation.

[0063] The rebound component 34 can, on the one hand, drive the door 2 to rotate, saving the user the pushing force when opening the door 2, or provide pulling force when the door 2 suddenly closes under its own weight, reducing the possibility of the user's fingers being pinched; on the other hand, it can buffer the vibration and impact of the door 2 during opening or closing, enhancing the user's operating feel.

[0064] Since the rotating shaft 33 is located inside the second cavity 20, and the center line of the rotating shaft 33 serves as the pivot axis of the hinge assembly 3, the oversize L can be kept relatively small. The oversize L can be further reduced by decreasing the outer diameter of the first bushing, the outer diameter of the second bushing, and the outer diameter of the elastic element.

[0065] Figure 6 This is a partial structural diagram of an opening and closing device according to another embodiment of this application. Figure 7 for Figure 6 The diagram shows a structural schematic of a hinge assembly in an opening and closing device. Figure 8 This is a structural schematic diagram of a hinge assembly in the related technology.

[0066] In some embodiments, the hinge assembly 3 further includes a swing shaft 35, which is slidably connected to the first hinge member 31 and rotatably connected to the second hinge member 32. The second hinge member 32 drives the door body 2 to rotate within a preset angle range through the swing shaft 35. One end of the spring-loaded assembly 34 is connected to the swing shaft 35, and the other end of the spring-loaded assembly 34 is connected to the end of the first hinge member 31 away from the rotation shaft 33.

[0067] See Figure 6 and Figure 7 In another embodiment of this application, the hinge assembly 3 of the opening and closing device 100 includes a first hinge member 31, a second hinge member 32, a rotating shaft 33, a swing shaft 35, and a spring-loaded assembly 34. Both the first hinge member 31 and the second hinge member 32 are U-shaped frame structures. The length of the first hinge member 31 is greater than the length of the second hinge member 32. A portion of the structure of the first hinge member 31 is located within the second cavity 20, and another portion of the structure of the first hinge member 31 is located within the first cavity 10 and connected to the housing 1. The second hinge member 32 is located within the second cavity 20 and connected to the door 2. Optionally, the portion of the first hinge member 31 located within the second cavity 20 is provided with an arc-shaped groove 310. During the rotation of the door 2, the swing shaft 35 moves along the arc-shaped groove 310 to limit the rotation of the door 2 within a preset angle range, for example, 0-90°.

[0068] The spring-loaded assembly 34 may include an elastic element, a stop element, and a pull rod, wherein the elastic element is placed longitudinally. The stop element is located at the end of the first hinge 31 away from the second hinge 32. One end of the pull rod is rotatably connected to the swing shaft 35, and the other end of the pull rod is slidably connected to the stop element. A stop block is provided on the pull rod, and the elastic element is sleeved on the outer periphery of the pull rod and located between the stop block and the stop element. The spring-loaded assembly 34 can drive the door 2 to rotate, saving the user's pushing force when opening the door 2; when the door 2 suddenly closes under its own weight, the spring-loaded assembly 34 can also provide pulling force, reducing the possibility of the user's fingers being pinched; the spring-loaded assembly 34 can also buffer the vibration and impact of the door 2 during opening or closing, enhancing the user's operating feel.

[0069] Since the rotating shaft 33 is located inside the second cavity 20 and serves as the pivot axis of the hinge assembly 3, the over-cab amount L can be kept relatively small. The over-cab amount L can be further reduced by decreasing the overall thickness of the hinge assembly 3 and the relative positional relationship between the swing shaft 35 and the rotating shaft 33.

[0070] In some embodiments, in the first direction X, the rotation shaft 33 is positioned closer to the second cavity 20 than the swing shaft 35, and the spring-loaded assembly 34 is in a stretched state connected between the swing shaft 35 and the end of the first hinge 31 away from the rotation shaft 33.

[0071] like Figure 7As shown, the hinge assembly 3 in this embodiment of the application and Figure 8 The hinge assembly 3 in the related technology shown has a similar structure, but the difference lies in the relative positional relationship between the swing shaft 35 and the rotation shaft 33, and the working state of the spring-back assembly 34 is also different.

[0072] Specifically, such as Figure 6 and Figure 7 As shown, in the first direction X, the rotation shaft 33 is positioned closer to the second cavity 20 than the swing shaft 35, and the elastic element in the rebound assembly 34 is a tension spring. During the rotation of the door body 2 and the second hinge 32 around the rotation shaft 33, the swing shaft 35 slides along the arc-shaped groove 310, and the sliding direction of the swing shaft 35 within the arc-shaped groove 310 is consistent with the rotation direction of the door body 2. That is, during the clockwise rotation of the door body 2 to the maximum opening angle, the swing shaft 35 slides clockwise within the arc-shaped groove 310. At this time, the elastic element is in a stretched state, connected between the stop block and the stop member. The tension of the elastic element and the frictional force generated between the stop block and the stop member act together on the swing shaft 35, causing the swing shaft 35 to generate a resultant torque relative to the rotation shaft 33 in the opposite direction to the gravitational torque, ensuring the balance of the door body 2 during rotation.

[0073] and Figure 8 In the hinge assembly shown in the related technology, in the first direction X, the swing shaft 35 is positioned closer to the second cavity 20 than the rotation shaft 33, and the elastic element of the rebound assembly 34 is a compression spring. The sliding direction of the swing shaft 35 in the arc-shaped groove 310 is opposite to the rotation direction of the door 2. That is, during the process of the door 2 rotating clockwise to the maximum opening angle, the swing shaft 35 slides counterclockwise in the arc-shaped groove 310. At this time, the elastic element is in a compressed state and connected between the stop block and the stop member. Both the rotation shaft 33 and the swing shaft 35 of the hinge assembly 3 need to be accommodated in the second cavity 20 to realize the rotation of the door 2, resulting in a large groove depth in the second cavity 20, which may affect the thermal insulation performance of the door 2.

[0074] Therefore, in this embodiment, the second cavity 20 of the door body 2 only needs to accommodate the rotation shaft 33 of the first hinge member 31 to realize the rotation of the door body 2, without having to accommodate both the rotation shaft 33 and the swing shaft 35 of the first hinge member 31 in the second cavity 20. This reduces the depth of the cutout in the second cavity 20 and minimizes the modification of the insulation layer on the door body 2. In particular, when the depth of the second cavity 20 is less than or equal to 20mm, the existing structural design of the insulation layer does not need to be modified. Thus, the depth of the cutout in the door body 2 can be reduced without affecting the insulation performance of the door body 2, which is beneficial for wall-mounted placement.

[0075] Figure 9 for Figure 6 A schematic diagram of another hinge component of the opening and closing device shown.

[0076] In some embodiments, during the process of the door 2 rotating relative to the housing 1 to the maximum opening angle, the rotating shaft 33 moves in the second cavity 20 in a direction away from the side 22, and the center distance between the rotating shaft 33 and the swing shaft 35 remains unchanged.

[0077] like Figure 9 As shown, the hinge assembly 3 in this embodiment of the application and Figure 7 The hinge assembly 3 in the related technology shown has a similar structure, but the difference is that during the rotation of the door body 2, the rotating shaft 33 not only enables the door body 2 to rotate, but also moves in the second cavity 20 in a direction away from the side 22.

[0078] Specifically, the portion of the first hinge 31 located within the second cavity 20 is provided with a first groove 311 and a second groove 312 at intervals. At least one of the first groove 311 and the second groove 312 can be an arc-shaped groove or other curved grooves. During the process of the door 2 rotating clockwise to its maximum opening angle, the rotating shaft 33 slides clockwise within the first groove 311, and the swing shaft 35 slides clockwise within the second groove 312. The center distance between the rotating shaft 33 and the swing shaft 35 remains constant, allowing the door 2 to move towards the inside of the second cavity 20 while rotating at a preset angle via the rotating shaft 33 and the swing shaft 35. This reduces the distance by which the intersection line of the side surface 21 and the top surface 23 of the door 2 extends beyond the reference plane 12 of the housing 1. Figure 7 Compared to the scheme where the position of the rotating shaft 33 remains unchanged within the second cavity 20, the oversized L of the door 2 in this embodiment can be further reduced, further reducing the possibility of the door 2 scraping against the wall during opening, which is more conducive to achieving wall-mounted placement.

[0079] In some embodiments, the portion of the first hinge 31 located within the second cavity 20 is arranged side by side with the second hinge 32; or, the portion of the first hinge 31 located within the second cavity 20 is arranged in a straight line with the second hinge 32.

[0080] like Figure 5 As shown, the portion of the first hinge member 31 of the hinge assembly 3 located within the second cavity 20 is arranged side-by-side with the second hinge member 32, and the elastic element is placed laterally. Figure 7 and Figure 9 As shown, the portion of the first hinge member 31 located within the second cavity 20 of the hinge assembly 3 is arranged side-by-side with the second hinge member 32, and the elastic elements are all placed longitudinally. This arrangement ensures that the wall thickness of the portion of the first hinge member 31 located within the second cavity 20 does not overlap with the wall thickness of the second hinge member 32, which helps reduce the overall thickness of the hinge assembly 3, thereby reducing the depth of the groove in the second cavity 20 and minimizing the impact of the second cavity 20 on the thermal insulation performance of the door body 2.

[0081] In addition, Figure 7 and Figure 9 Based on the two embodiments of the hinge assembly 3 shown, the hinge assembly 3 can also have various modified structures. For example, the portion of the first hinge member 31 located in the second cavity 20 can also be arranged in a straight line with the second hinge member 32, that is, the second hinge member 32 can be placed within the U-shaped frame of the first hinge member 31. At the same time, the portion of the first hinge member 31 located in the second cavity 20 can be provided with a first sliding groove 311 and a second sliding groove 312 at intervals, with the rotation shaft 33 sliding along the first sliding groove 311 and the swing shaft 35 sliding along the second sliding groove 312; or, the portion of the first hinge member 31 located in the second cavity 20 can only be provided with an arc-shaped groove 310, with the swing shaft 35 sliding along the arc-shaped groove 310, while the rotation shaft 33 is fixedly connected to the first hinge member 31 and rotatably connected to the second hinge member 32. With this configuration, although the wall thickness of the portion of the first hinge 31 located inside the second cavity 20 is superimposed on the wall thickness of the second hinge 32, increasing the overall thickness of the hinge assembly 3, the width of the second cavity 20 can be reduced, and the thickness of the door 2 remains basically unchanged, thus minimizing the impact of the second cavity 20 on the thermal insulation performance of the door 2.

[0082] It is understood that, depending on the application scenario, the first hinge member 31, the second hinge member 32, the rotating shaft 33, the swing shaft 35 and the spring-loaded assembly 34 of the hinge assembly 3 in various embodiments of this application can be combined or modified in various ways, all of which are within the protection scope of this application.

[0083] In some embodiments, the thickness of the door body 2 is T, and the distance h between the pivot axis of the hinge assembly 3 and the top surface 21 satisfies the following condition: h < 0.5 * T.

[0084] like Figure 2 and Figure 3As shown, in order for the door 2 to remain suspended at a certain angle, the gravitational torque generated by the gravity of the door 2 on the rotation axis 33 and the rotational torque of the swing axis 35 relative to the rotation axis 33 need to be equal in magnitude and opposite in direction. The thickness of the door 2 is T, and the distance h between the pivot axis of the hinge assembly 3 and the top surface 21 is less than 0.5*T. Thus, during the process of the door 2 rotating relative to the box 1 to the maximum opening angle, the center of gravity of the door 2 is always located on the same side of the vertical plane passing through the rotation axis 33, such as the left side in the figure. The resultant torque generated by the elastic force and friction force of the hinge assembly 3 on the swing axis 35 relative to the rotation axis 33 is always located on the other side of the vertical plane, such as the right side in the figure. For example, the thickness of the door body 2 is T = 50mm, and the center distance between the rotating shaft 33 and the top surface 23 is h = 16mm. In this way, during the process of the door body 2 rotating relative to the box body 1 to 90°, the center of gravity of the door body 2 is always located on the left side of the figure, preventing the door body 2 from continuing to flip over and scraping against the wall when it rotates to the maximum opening angle of 90°.

[0085] Figure 10 for Figure 7 The diagram shows a simplified representation of the structure of the opening and closing device, where the door rotates relative to the housing.

[0086] In some embodiments, the minimum distance h1 between the top wall 2a of the second cavity 20 and the top surface 21 of the door 2 is ≥10mm; or, the door 2 is provided with a glass panel, and the minimum distance h1 between the top wall 2a of the second cavity 20 and the top surface 21 is equal to the thickness of the glass panel, and h1 ≥2mm.

[0087] like Figure 10 As shown, the wall of the second cavity 20 includes a top wall 2a, which is on the same side as the top surface 21. The top wall 2a can be flat or curved. The door body 2 is generally made of metal. In one example, the minimum distance h1 between the top wall 2a and the top surface 21 of the second cavity 20 is ≥10mm. In another example, the door body 2 is provided with a glass panel. The second cavity 20 can be grooved to the top surface 21, and the grooved area can be covered by the glass panel to avoid affecting the aesthetics of the door body 2. In this case, the minimum distance h1 between the top wall and the top surface 21 of the second cavity 20 is the thickness of the glass panel, and h1 ≥2mm.

[0088] In some embodiments, the distance between the first wall 2a of the second cavity 20 along the recess depth direction and the center line of the rotation shaft 33 is H1, the maximum distance between the upper end face of the first hinge member 31 and the center line of the rotation shaft 33 is H2, and H1>H2; the distance between the second wall 2b of the second cavity 20 facing the top surface 21 and the center line of the rotation shaft 33 is H3, the maximum distance between the side wall of the first hinge member 31 protruding outward relative to the reference surface 12 and the center line of the rotation shaft 33 is H4, and H3>H4.

[0089] As Figure 10 shown, the dashed lines illustrate a simulation schematic diagram of the motion trajectories of the inner wall of the second cavity 20, the intersection line between the top surface 21 and the side surface 22 of the door body 2, and the intersection line between the bottom surface 23 and the side surface 22 of the door body 2 during the rotation process of the door body 2. Through simulation analysis, it can be verified whether the wall portion of the second cavity 20 and the hinge assembly 3 have cross interference during the rotation process of the door body 2.

[0090] Specifically, the wall portion of the second cavity 20 along the recess depth direction is defined as the first wall 2a, and the wall portion of the second cavity 20 facing the top surface 21 of the door body 2 is defined as the second wall 2b. The distance H1 between the first wall 2a and the center line of the rotating shaft 33 is 11.4 mm, the distance H3 between the second wall 2b and the center line of the rotating shaft 33 is 16.1 mm, the shortest distance between the upper end surface of the first hinge member 31 and the center line of the rotating shaft 33 is H2, and the shortest distance between the side wall of the first hinge member 31 protruding outward relative to the reference surface 12 and the rotating shaft 33 is H4. When H1>H2 and H3>H4, each wall portion of the second cavity 20 does not interfere with each component of the hinge assembly 3.

[0091] Accordingly, in the opening and closing apparatus 100 provided in the embodiments of the present application, an inwardly recessed mounting cavity is formed in at least one of the side surface 22 of the door body 2 and the reference surface 12 of the box body 1, and at least part of the hinge assembly 3 is disposed in the mounting cavity. In the process that the door body 2 rotates relative to the box body 1 to the maximum opening angle, along the direction perpendicular to the reference surface 12, the maximum distance by which the door body 2 extends beyond the reference surface 12 is the overhang amount L, and 0<L≤20 mm. Compared with the overhang amount of 50 mm or more in the related art, since the distance by which the door body 2 extends beyond the reference surface 12 of the box body 1 during the process of opening and closing the door body is small, the possibility of the door body 2 scraping against the wall surface W during the opening process is reduced, wall-adjacent placement is achieved, and the user experience is improved. In addition, according to the boundary condition of the overhang amount L, the thickness dimension of the door body 2, the grooving dimension of the mounting cavity, and the structure and thickness dimension of the hinge assembly 3 can be designed, so as to ensure that the wall portion of the mounting cavity does not interfere with each component of the hinge assembly 3 during the opening or closing process of the door body 2.

[0092] Reference to "an embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of this phrase in various places in the specification do not necessarily all refer to the same embodiment, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0093] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An opening and closing device, characterized in that, include: The box has an opening at its top along its height. and The door is pivotally connected to the housing via a hinge assembly to open or close the opening. One side of the housing has a reference surface, and the door has a side surface disposed on the same side as the reference surface. At least one of the reference surface and the side surface forms an inwardly recessed mounting cavity, and at least a portion of the hinge assembly is disposed within the mounting cavity. When the door is closed on the opening, the reference surface and the side surface are flush along a first direction perpendicular to the reference surface. During the process of the door rotating relative to the housing to its maximum opening angle, the maximum distance the door extends beyond the reference surface along the first direction is the over-cabinet amount L. The over-cabinet amount L satisfies the following condition: 0 <L≤20mm。 2. The opening and closing device according to claim 1, characterized in that, The door also has a top surface and a bottom surface, the bottom surface is facing the opening, the top surface is parallel to the bottom surface, and the side surfaces are connected to the top surface and the bottom surface respectively; The distance between the pivot axis of the hinge assembly and the side surface is d, and the distance between the pivot axis of the hinge assembly and the top surface is h. During the process of the door rotating relative to the housing to its maximum opening angle, the overhang L is maximized when the intersection line of the top surface and the side surface is on the same horizontal plane as the pivot axis of the hinge assembly.

3. The opening and closing device according to claim 1, characterized in that, A portion of the hinge assembly is located within the mounting cavity, and the other portion protrudes outward from the reference surface along the first direction by a maximum distance S, wherein the mounting distance S satisfies the following conditions: L≥S and S≤10mm.

4. The opening and closing device according to claim 1, characterized in that, The maximum opening angle θ of the door relative to the box body satisfies the following condition: 80° < θ ≤ 90°.

5. The opening and closing device according to any one of claims 1 to 4, characterized in that, The mounting cavity includes a first cavity and a second cavity. One end of the opening of the housing is recessed inward on one side of the reference plane to form the first cavity, and one side of the door is recessed inward to form the second cavity. The pivot axis of the hinge assembly is located in the second cavity.

6. The opening and closing device according to claim 5, characterized in that, The hinge assembly includes a first hinge member, a second hinge member, a rotating shaft, and a spring-loaded assembly. A portion of the first hinge member is disposed in the first cavity and connected to the housing. Another portion of the first hinge member is disposed in the second cavity. The second hinge member is disposed in the second cavity and connected to the door. The second hinge is pivotally connected to the first hinge via the rotation shaft, and the spring-back assembly is configured to generate a spring force that drives the door to rotate relative to the housing.

7. The opening and closing device according to claim 6, characterized in that, The hinge assembly further includes a swing shaft, which is slidably connected to the first hinge member and rotatably connected to the second hinge member. The second hinge member drives the door to rotate within a preset angle range through the swing shaft. One end of the spring-loaded assembly is connected to the swing shaft, and the other end of the spring-loaded assembly is connected to the end of the first hinge member away from the rotation shaft.

8. The opening and closing device according to claim 7, characterized in that, In the first direction, the rotation axis is positioned closer to the second cavity than the swing axis, and the rebound assembly is in a stretched state connected between the swing axis and the end of the first hinge that is away from the rotation axis.

9. The opening and closing device according to claim 8, characterized in that, During the process of the door rotating relative to the box to the maximum opening angle, the rotating shaft moves in the second cavity in a direction away from the side, and the center distance between the rotating shaft and the swing shaft remains unchanged.

10. The opening and closing device according to claim 7, characterized in that, The portion of the first hinge member located within the second cavity is arranged side-by-side with the second hinge member; or, the portion of the first hinge member located within the second cavity is arranged in a straight line with the second hinge member.

11. The opening and closing device according to claim 5, characterized in that, The minimum distance h1 between the top wall of the second cavity and the top surface of the door is ≥ 10 mm; Alternatively, the door body is provided with a glass panel, and the minimum distance h1 between the top wall of the second cavity and the top surface of the door body is equal to the thickness of the glass panel, and h1≥2mm.

12. The opening and closing device according to claim 6, characterized in that, The thickness of the door body is T, and the distance h between the pivot axis of the hinge assembly and the top surface of the door body satisfies the following condition: h < 0.5 * T; And / or, the distance between the first wall of the second cavity along the depth of the recess and the center line of the rotation axis is H1, the maximum distance between the upper end face of the first hinge and the center line of the rotation axis is H2, and H1>H2; the distance between the second wall of the second cavity facing the top surface and the center line of the rotation axis is H3, the maximum distance between the side wall of the first hinge protruding outward relative to the reference surface and the center line of the rotation axis is H4, and H3>H4.

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