Opening and closing device

Abstract

The utility model relates to domestic appliance technical field discloses a kind of opening and closing equipment, including cabinet and door body, cabinet is provided with opening, door body is pivotedly connected in opening place by hinge assembly, the outer wall surface of door body is provided with the installation cavity recessed to door body interior, installation cavity contains at least part hinge assembly, hinge assembly includes rotationally connected first hinge seat and second hinge seat, first hinge seat is connected with door body, second hinge seat is connected with cabinet, the pivot axis of both first hinge seat and second hinge seat coincides and is located in installation cavity.In the utility model, the pivot axis of first hinge seat and second hinge seat is arranged in the installation cavity on the door body, so that when the door body rotates around the pivot axis, the rotation track is closer to the cabinet, thereby reducing the distance of the door body beyond the back of the cabinet during opening and closing, wall placement can be achieved, door body scratching during opening is reduced, and user experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to an opening and closing device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Household appliances such as freezers, refrigerators, and dishwashers typically consist of a cabinet and a door that opens and closes relative to the cabinet. The door and cabinet are connected by a hinge assembly to open and close. In these technologies, the hinge assembly generally protrudes from the outside of the freezer cabinet. During door opening and closing, the protruding hinge restricts the movement of the door beyond the back of the cabinet, making it impossible to place the appliance flush against the wall and increasing the risk of it rubbing against the wall. Utility Model Content

[0004] The purpose of this invention is to at least solve the problem of the door extending too far beyond the back of the housing during door opening and closing. This purpose is achieved through the following technical solution:

[0005] The first aspect of this utility model provides an opening and closing device, comprising:

[0006] The box has an opening;

[0007] A door body is pivotally connected to the opening via a hinge assembly. The outer wall of the door body has a recessed mounting cavity that accommodates at least a portion of the hinge assembly. The hinge assembly includes a first hinge seat and a second hinge seat that are rotatably connected. The first hinge seat is connected to the door body, and the second hinge seat is connected to the housing. The pivot axes of the first hinge seat and the second hinge seat coincide and are located within the mounting cavity.

[0008] The opening and closing device of this utility model sets the pivot axis of the first hinge seat and the second hinge seat in the mounting cavity on the door body. When the door body rotates around the pivot axis, its rotation trajectory is closer to the box body, which reduces the range of the door body protruding outward during the opening process. This reduces the distance of the door body beyond the back of the box body, allowing it to be placed close to the wall. At the same time, it reduces the possibility of the door body rubbing against the wall during the opening process, improving the user experience.

[0009] In addition, the opening and closing device according to this utility model may also have the following additional technical features:

[0010] In some embodiments of this utility model, the hinge assembly has a first state and a second state that can switch between each other. In the first state, the door is closed, and in the second state, the door is open. The hinge assembly also includes an elastic element that cooperates with the first hinge seat and the second hinge seat respectively. The rebound force of the elastic element drives the hinge to have a tendency to switch from the first state to the second state.

[0011] In some embodiments of this utility model, the first hinge seat includes a first hinge bushing and a first mounting plate, the second hinge seat includes a second hinge bushing and a second mounting plate, the first hinge bushing and the second hinge bushing are rotatably connected, the first mounting plate is connected to the end of the first hinge bushing away from the second hinge bushing, the first mounting plate is installed in the mounting cavity and connected to the door body, the second mounting plate is connected to the outer wall of the second hinge bushing and extends in a direction perpendicular to the pivot axis, and the second mounting plate is connected to the housing.

[0012] In some embodiments of this utility model, the hinge assembly further includes a rotating shaft and a driving component;

[0013] The rotating shaft is respectively inserted into the first hinge sleeve and the second hinge sleeve. The driving member is movably sleeved on the rotating shaft. The elastic member is sleeved on the end of the rotating shaft away from the first hinge sleeve and abuts against the driving member. The first hinge sleeve and the driving member are connected by a transmission structure.

[0014] The transmission structure is configured to convert the rotational motion of the first hinge bushing into linear motion of the driving member along the axial direction of the rotation axis, and the elastic member, through the transmission structure, causes the first hinge bushing to have a tendency to switch from the first state to the second state.

[0015] In some embodiments of this utility model, the elastic element is a spring.

[0016] In some embodiments of this utility model, the transmission structure includes a first mating structure disposed on the first hinge bushing and a second mating structure disposed on the driving member. The first hinge bushing is capable of reciprocating within a preset angle range relative to the second hinge bushing around the pivot axis, so that the first mating structure and the second mating structure slide relative to each other, thereby causing the first hinge bushing and the second hinge bushing to rotate relative to each other.

[0017] In some embodiments of this utility model, the first mating structure has a first curved surface and a first mating surface, and the second mating structure has a second curved surface and a second mating surface. In the first state, the first mating surface abuts against the second mating surface, and in the second state, the first curved surface abuts against the second curved surface, so that the first hinge bushing and the second hinge bushing have a relative rotational force.

[0018] In some embodiments of this utility model, the first curved surface and / or the second curved surface are helical surfaces.

[0019] In some embodiments of this utility model, a first stop is provided on the side of the driving member near the first hinge bushing, and a first mating part is provided on the side of the first hinge bushing near the driving member. When the first hinge bushing and the second hinge bushing rotate relative to each other to the maximum opening angle, the first stop and the first mating part cooperate to abut against each other to restrict the relative rotation of the first hinge bushing and the second hinge bushing.

[0020] In some embodiments of this utility model, a second stop is provided on the outer wall surface of the first hinge bushing, and a second mating part is provided on the outer wall surface of the second hinge bushing. When the first hinge bushing and the second hinge bushing rotate relative to each other to the maximum opening angle, the second stop and the second mating part cooperate to abut against each other to restrict the relative rotation of the first hinge bushing and the second hinge bushing. Attached Figure Description

[0021] 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 the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 A schematic diagram of the opening and closing device according to an embodiment of the present invention is shown.

[0023] Figure 2 for Figure 1 Cross-sectional view at point AA;

[0024] Figure 3 for Figure 2 Enlarged view of point B in the middle;

[0025] Figure 4 A schematic diagram of the hinge assembly of an opening and closing device according to an embodiment of the present invention is shown.

[0026] Figure 5An exploded view schematically showing the hinge assembly of an opening and closing device according to an embodiment of the present invention is shown.

[0027] Figure 6 A schematic cross-sectional view of the hinge assembly of an opening and closing device according to an embodiment of the present invention is shown.

[0028] Figure 7 A schematic diagram of the structure of the first hinge seat of the hinge assembly of the opening and closing device according to an embodiment of the present invention is shown.

[0029] Figure 8 A schematic diagram of the drive component of the hinge assembly of the opening and closing device according to an embodiment of the present invention is shown.

[0030] The attached figures are labeled as follows:

[0031] 100. Opening and closing devices;

[0032] 1. Box body; 11. Opening;

[0033] 2. Door body; 21. Mounting cavity; 22. First surface; 23. Reference surface; 24. Second surface;

[0034] 3. Hinge assembly; 31. First hinge seat; 311. First hinge bushing; 312. First mounting plate; 3121. First mounting hole; 32. Second hinge seat; 321. Second hinge bushing; 322. Second mounting plate; 3221. Second mounting hole; 33. Rotating shaft; 34. Elastic element; 35. Driving element; 361. First curved surface; 362. First mating surface; 371. Second curved surface; 372. Second mating surface; 38. Shim; 381. Notch;

[0035] 41. First stop part; 42. First mating part; 43. Second stop part; 44. Second mating part;

[0036] P, pivot axis; X, first direction; Y, first rotation direction. Detailed Implementation

[0037] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0038] 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.

[0039] 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.

[0040] 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 "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0041] In related technologies, the hinge components generally protrude from the outside of the freezer body. During the opening and closing of the door, due to the restriction of the protruding hinge, the door extends a large distance beyond the back of the freezer body, making it impossible to place electrical appliances close to the wall and easily causing them to rub against the wall.

[0042] In view of this, this embodiment provides an opening and closing device 100, which aims to solve the above-mentioned technical problems by setting the pivot axis P of the first hinge seat 31 and the second hinge seat 32 in the mounting cavity 21 on the door body 2, so that when the door body 2 rotates around the pivot axis P, its rotation trajectory is closer to the box body 1, reducing the distance of the door body 2 beyond the back of the box body 1.

[0043] like Figures 1 to 8 As shown, according to an embodiment of the present invention, an opening and closing device 100 is proposed, including a housing 1 and a door 2. The housing 1 is provided with an opening 11. The door 2 is pivotally connected to the opening 11 by a hinge assembly 3. The outer wall surface of the door 2 is provided with a mounting cavity 21 recessed into the door 2. The mounting cavity 21 is provided to accommodate at least part of the hinge assembly 3. The hinge assembly 3 includes a first hinge seat 31 and a second hinge seat 32 rotatably connected. The first hinge seat 31 is connected to the door 2, and the second hinge seat 32 is connected to the housing 1. The pivot axes P of the first hinge seat 31 and the second hinge seat 32 coincide and are located within the mounting cavity 21.

[0044] 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. If there are multiple openings 11, there may also be multiple doors 2. 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 outer walls of the doors 2 has an inwardly recessed mounting cavity 21. The hinge assembly 3 may be completely or partially hidden in the mounting cavity 21, as long as the pivot axis P of the hinge assembly 3 is located within the mounting cavity 21. This minimizes the distance the hinge assembly 3 protrudes outward from the plane of the outer wall, which is beneficial for placing the opening and closing device 100 against the wall.

[0045] The number of hinge components 3 can be one or more (two or more) depending on the weight of the door body 2. The position of the hinge components 3 can be symmetrical about the center of the door body 2 or asymmetrical.

[0046] The opening and closing device 100 of this utility model sets the pivot axis P of the first hinge seat 31 and the second hinge seat 32 in the mounting cavity 21 on the door body 2. This makes the rotation trajectory of the door body 2 closer to the box body 1 when it rotates around the pivot axis P, reducing the range of the door body 2 protruding outward during the opening process. This reduces the distance of the door body 2 beyond the back of the box body 1, allowing it to be placed against the wall. At the same time, it reduces the possibility of the door body 2 scraping against the wall during the opening process, improving the user experience.

[0047] In some embodiments of this utility model, the hinge assembly 3 has a first state and a second state that can switch between each other. In the first state, the door 2 is closed, and in the second state, the door 2 is open. The hinge assembly 3 also includes an elastic element 34, which cooperates with the first hinge seat 31 and the second hinge seat 32 respectively. The elastic element 34 generates a rebound force through its own elastic deformation. The rebound force of the elastic element 34 drives the hinge assembly 3 to have a tendency to switch from the first state to the second state. Due to the rebound force of the elastic element 34, when the door 2 is in the first state (closed state), once an external force causes the door 2 to start moving, the rebound force of the elastic element 34 will push the door 2 to continue to open until the second state (open state) is reached.

[0048] In some embodiments of this utility model, the first hinge seat 31 includes a first hinge bushing 311 and a first mounting plate 312, and the second hinge seat 32 includes a second hinge bushing 321 and a second mounting plate 322. The first hinge bushing 311 and the second hinge bushing 321 are rotatably connected. The first mounting plate 312 is connected to the end of the first hinge bushing 311 away from the second hinge bushing 321. The first mounting plate 312 is installed in the mounting cavity 21 and connected to the door body 2. The second mounting plate 322 is connected to the outer wall of the second hinge bushing 321 and extends in a direction perpendicular to the pivot axis P. The second mounting plate 322 is connected to the housing 1.

[0049] Specifically, both the first hinge bushing 311 and the second hinge bushing 321 are hollow cylindrical structures, and their axes coincide with the pivot axis P. The first hinge seat 31 is installed in the mounting cavity 21 via the first mounting plate 312. Optionally, the first mounting plate 312 may be provided with a first mounting hole 3121, which is used to cooperate with a fastener to fix the first mounting plate 312 to the door body 2. The number of first mounting holes 3121 can be one or multiple holes spaced apart. The fastener can be a bolt, screw, etc. In one specific implementation, the first mounting hole 3121 is a mounting hole, and the fastener is a bolt. The housing 1 may have a recessed mounting portion, and the second mounting plate 322 is installed within the mounting portion. Alternatively, the second mounting plate 322 can be directly installed on the back of the housing 1. The second mounting plate 322 is relatively long and its extension direction is perpendicular to the pivot axis P, ensuring that the second hinge seat 32 can be stably fixed to the housing 1, providing support for the opening and closing of the door 2. Optionally, the second mounting plate 322 may be provided with a second mounting hole 3221. The second mounting hole 3221 is used to cooperate with a fastener to fix the second mounting plate 322 to the door 2. The number of second mounting holes 3221 can be one or multiple holes spaced apart. The fastener can be a bolt, screw, etc. In one specific implementation, the second mounting hole 3221 is a mounting hole, and the fastener is a bolt.

[0050] In some embodiments of this utility model, the hinge assembly 3 further includes a rotating shaft 33 and a driving member 35. The two ends of the rotating shaft 33 are respectively disposed in the first hinge bushing 311 and the second hinge bushing 321. The driving member 35 is movably sleeved on the rotating shaft 33. The elastic member 34 is sleeved on the end of the rotating shaft 33 away from the first hinge bushing 311 and abuts against the driving member 35. The first hinge bushing 311 and the driving member 35 are connected by a transmission structure. The transmission structure is configured such that the elastic member 34 causes the first hinge bushing 311 to have a tendency to switch from a first state to a second state through the transmission structure.

[0051] Specifically, the first hinge bushing 311 has a first receiving cavity extending along its length direction, and the first receiving cavity has a first opening. The second hinge bushing 321 has a second receiving cavity extending along its length direction, and the second receiving cavity has a second opening opposite to the first opening. One end of the rotating shaft 33 is placed in the first receiving cavity through the first opening, and the other end of the rotating shaft 33 is placed in the second receiving cavity through the second opening. The elastic member 34 is disposed in the first receiving cavity and is located at the end of the driving member 35 opposite to the first hinge bushing 311. The first hinge bushing 311 and the driving member 35 are connected by a transmission structure. The transmission structure converts the rotational motion of the first hinge bushing 311 into a tendency to switch the first hinge bushing 311 from a first state to a second state, thereby opening the door 2.

[0052] In some embodiments of this invention, the elastic element 34 is a spring. The dimensions of the elastic element 34 are adapted to the dimensions of the first receiving cavity.

[0053] In some embodiments of this utility model, the transmission structure includes a first mating structure disposed on the first hinge bushing 311 and a second mating structure disposed on the driving member 35. The first hinge bushing 311 can reciprocate relative to the second hinge bushing 321 around the pivot axis P within a preset angle range, so that the first mating structure and the second mating structure slide relative to each other, so that the first hinge bushing 311 and the second hinge bushing 321 rotate relative to each other.

[0054] Specifically, the first mating structure has a first curved surface 361 and a first mating surface 362, and the second mating structure has a second curved surface 371 and a second mating surface 372. The first mating surface 362 can be located at one end of the first curved surface 361 near the second mating structure, and the second mating surface 372 can be located at one end of the second curved surface 371 near the first mating structure. In the first state, the first mating surface 362 and the second mating surface 372 abut against each other, and the elastic element 34 is in a compressed state. During the opening of the door 2, the first mating surface 362 and the second mating surface 372 slide relative to each other, and gradually change to the first curved surface 361 and the second curved surface 371 abutting against each other, and the first curved surface 361 slides on the second curved surface 371, and the elastic element 34 gradually returns to its original position. In the second state, the first curved surface 361 and the second curved surface 371 remain in contact, so that the first hinge bushing 311 and the second hinge bushing 321 have a relative rotational force. The force applied by the elastic element 34 to the driving element 35, under the cooperation of the first curved surface 361 and the second curved surface 371, has a component force that causes the first hinge seat 31 to rotate relative to the second hinge seat 32, thereby causing the first hinge seat 31 and the second hinge seat 32 to have a tendency to rotate relative to each other or to rotate under the action of this force. When the hinge assembly 3 is assembled to the opening and closing device 100, in the second state, the hinge assembly 3 has a tendency to rotate the door body 2 in the direction in which the door body 2 opens, that is, the hinge assembly 3 has a force to rotate along the first rotation direction Y, the first rotation direction Y being the same as the rotation direction in which the door body 2 opens.

[0055] In some embodiments of this utility model, the first curved surface 361 and / or the second curved surface 371 are helical surfaces.

[0056] Specifically, the first surface 361 can be a helical surface, the second surface 371 can be a helical surface, and both the first surface 361 and the second surface 371 can be helical surfaces.

[0057] During actual assembly, the elastic element 34 can be reasonably set according to the weight of the door 2, so that the torque generated by the hinge assembly 3 in the second state can be greater than the torque generated by the weight of the door 2, allowing the door 2 to be suspended in the second state. For example, if the weight of the door 2 is G, the weight of the door 2 has a counterclockwise torque M1 on the rotating shaft 33. When the angle between the door 2 and the housing 1 is 0°, the opening force F has a clockwise torque M2 on the rotating shaft 33. The clockwise torque M3 of the elastic element 34 is transmitted to the rotating shaft, and M2 + M3 ≥ M1, so the door 2 opens. During the opening of door 2, the counterclockwise torque M1 of the gravity of door 2 on the rotation axis 33 decreases, while the torsional torque M3 provided by the elastic element 34 decreases. The first curved surface 361 slides relative to the second curved surface 371, and the frictional force Fs of their interaction hinders the rotation of the first hinge bushing 311, which generates a counterclockwise torque M4 on the pivot axis P. When in the hovering position, M1 + M4 = M3. The hovering angle range of door 2 is set from 30° to a maximum angle of 90°. For example, the hovering angle range of door 2 can be 30°, 40°, 45°, 50°, 60°, 75°, 80°, 90°, etc., achieving hovering at any angle through torque balance.

[0058] In some embodiments of this utility model, a first stop portion 41 is provided on the side of the driving member 35 near the first hinge bushing 311, and a first mating portion 42 is provided on the side of the first hinge bushing 311 near the driving member 35. When the first hinge bushing 311 and the second hinge bushing 321 rotate relative to each other to the maximum opening angle, the first stop portion 41 and the first mating portion 42 cooperate to abut against each other to restrict the relative rotation of the first hinge bushing 311 and the second hinge bushing 321.

[0059] Specifically, the first stop 41 is located on the side of the drive member 35 facing away from the second curved surface 371, and the first mating part 42 is located on the side of the first hinge bushing 311 facing away from the first curved surface 361. The first stop 41 and the first mating part 42 are connected in a mating manner. When the door body 2 rotates relative to the housing 1 along the first rotation direction Y, the first hinge bushing 311 and the second hinge bushing 321 rotate relative to each other. The first stop 41 will gradually approach the first mating part 42. When the stop part abuts against the mating part, further rotation of the door body 2 will be prevented, thereby limiting the maximum rotation angle between the first hinge bushing 311 and the second hinge bushing 321. This restricts the door body 2 from continuing to rotate along the first rotation direction Y in the direction of door body 2 opening. When the door body 2 opens to its maximum angle, the stop structure on the first hinge bushing 311 and the second hinge bushing 321 contacts each other and remains stationary at the maximum angle, preventing the door body 2 or the hinge assembly 3 from rotating excessively, thereby avoiding damage to the hinge structure or affecting the normal use of the opening and closing device 100.

[0060] In some embodiments of this utility model, a second stop 43 is provided on the outer wall surface of the first hinge bushing 311, and a second mating part 44 is provided on the outer wall surface of the second hinge bushing 321. When the first hinge bushing 311 and the second hinge bushing 321 rotate relative to each other to the maximum opening angle, the second stop 43 and the second mating part 44 cooperate to abut against each other to restrict the relative rotation of the first hinge bushing 311 and the second hinge bushing 321.

[0061] Specifically, the second stop 43 includes either a limiting block or a limiting wall, and the second mating part 44 includes either a limiting block or a limiting wall. In this embodiment, a limiting wall is provided on the outer wall of the first hinge bushing 311, extending in a direction parallel to the pivot axis P. A limiting block is provided on the outer wall of the second hinge bushing 321, and the length of the limiting wall is greater than the distance from the limiting block in a direction parallel to the pivot axis P to the end of the second hinge bushing 321 facing the first hinge bushing 311. When the door 2 rotates relative to the housing 1 in the first rotation direction Y, the first hinge bushing 311 and the second hinge bushing 321 rotate relative to each other. Under normal circumstances, when the door 2 rotates to its maximum angle in the first rotation direction Y, the second stop 43 will not abut or just abut with the second mating part 44. Instead, the maximum opening angle of the door 2 is limited by the abutment between the first stop 41 and the first mating part 42. However, when the first stop 41 and the first mating part 42 fail, and cannot restrict the continued rotation of the first hinge bushing 311 and the second hinge bushing 321 when they reach their maximum rotation angle, the first hinge bushing 311 and the second hinge bushing 321 continue to rotate relative to each other, thereby causing the second stop 43 to abut against the second mating part 44. At this time, the relative rotation of the first hinge bushing 311 and the second hinge bushing 321 is prevented, so that the further rotation of the door body 2 is prevented, thereby restricting the door body 2 from continuing to rotate in the first rotation direction Y toward the opening direction of the door body 2, and preventing the door body 2 or the hinge assembly 3 from rotating excessively.

[0062] By setting a double stop structure, even if one stop component fails, the other can still provide a limit function, which is highly reliable, prevents the door 2 from rotating excessively or opening abnormally, avoids accidental damage, and ensures the smooth operation of the opening and closing device 100.

[0063] In some embodiments of the present utility model, a gasket 38 may be provided at one end of the first hinge bushing 311 facing away from the second hinge bushing 321. The rotating shaft 33 may pass through the gasket 38 and then be riveted or fixed in cooperation with a nut. A notch 381 may be provided at the edge of the gasket 38, and a protruding structure may be provided on the end surface of the first hinge bushing 311 cooperating with the gasket 38. The protruding structure and the notch 381 are correspondingly matched to prevent the gasket 38 from rotating along with the first hinge bushing 311. It can be understood that a gasket 38 may also be provided at one end of the second hinge bushing 321 facing away from the first hinge bushing 311.

[0064] As Figure 3 shown, the door body 2 includes a first surface 22 provided on the same side as the installation cavity 21. One side of the box body 1 has a reference surface 23 provided on the same side as the first surface 22. When the door body 2 covers the opening 11, the reference surface 23 and the first surface 22 are flush along a first direction X perpendicular to the reference surface 23. During the process of the door body 2 rotating relative to the box body 1 to the maximum opening angle, the maximum distance that the door body 2 exceeds the reference surface 23 along the first direction X is the over-box amount L, and the over-box amount L satisfies the following condition: 0 < L ≤ 20 mm.

[0065] The door body 2 covers the opening 11 of the box body 1. At this time, the reference surface 23 and the first surface 22 are flush along the first direction X, which can not only improve the aesthetics of the opening and closing device 100 but also reduce the distance between the door body 2 and the wall surface. Since a skirting board is generally provided at the junction of the wall surface and the ground in interior decoration projects, and the wall thickness of the skirting board is generally 10 mm, the reference surface 23 of the box body 1 is arranged to be in contact with the skirting board. Considering the assembly error between the opening and closing device 100 and the ground, the gap between the first surface 22 of the door body 2 and the wall surface of the wall is ≥ 10 mm. During the process of the door body 2 rotating relative to the box body 1 to the maximum opening angle, the door body 2 will exceed the reference surface 23 by a certain distance along the first direction X. The maximum distance that the door body 2 exceeds the reference surface 23 along the first direction X is defined as the over-box amount L. Limiting the over-box amount L ≤ 20 mm can minimize the distance that the door body exceeds the back of the box body as much as possible and reduce the possibility of the door body 2 rubbing against the wall surface during the opening process.

[0066] Furthermore, the over-box amount L satisfies the following condition: 0 < L ≤ 10 mm. At this time, the reference surface 23 of the box body 1 is completely in contact with the skirting board, the assembly error between the opening and closing device 100 and the ground is small, the maximum gap between the first surface 22 of the door body 2 and the wall surface of the wall is 10 mm, and during the process of the door body 2 rotating relative to the box body 1 to the maximum opening angle, the over-box amount L of the door body 2 does not exceed the maximum gap between the first surface 22 of the door body 2 and the wall surface of the wall, so that it can be placed against the wall, further reducing the over-box amount.

[0067] The distance between the pivot axis P and the first surface 22 is L1. The vertical plane perpendicular to the pivot axis P is the reference plane. The orthographic projection of the pivot axis P in the reference plane is point O. The side of the door 2 away from the box 1 is the second surface 24. The orthographic projection of the intersection line of the second surface 24 and the first surface 22 in the reference plane is point A. The distance between point O and point A is L2. The oversize L = L2 - L1.

[0068] Specifically, the door 2 also includes a second surface 24 facing away from the housing 1, and the distance between the pivot axis P and the second surface 24 is L3. When the connection between the first surface 22 and the second surface 24 is at a right angle, that is, when the plane containing the first surface 22 is perpendicular to the plane containing the second surface 24, then L2 2 =L1 2 +L3 2 L2 can be calculated using the above formula, and then the overfill amount L can be calculated using the formula L = L2 - L1. When the connection between the first surface 22 and the second surface 24 is a rounded corner, that is, the plane where the first surface 22 is located and the plane where the second surface 24 is located are connected by an arc structure transition, the radius of the rounded corner is r, and the distance from point O to the center of the rounded corner is R1. In this case, L2 = R1 + r, and L2 can be calculated using the above formula, and then the overfill amount L can be calculated using the formula L = L2 - L1. When the connection between the first surface 22 and the second surface 24 is an angled angle, that is, the first surface 22 and the second surface 24 are connected by an inclined plane, and the length of the inclined plane is c, then L2... 2 =(L1-C) 2 +L3 2 L2 can be calculated using the above formula, and then the oversized container L can be calculated using the formula L = L2 - L1.

[0069] 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 in the middle moves, when door 2 rotates to Figure 3 When the position indicated by the dashed line is reached, point A reaches point A' and point B reaches point B'. At this time, the over-cabinet amount L is the distance between point A' and the reference surface 23 of the box body 1. It can be seen that as the rotation angle of the door body 2 increases, the over-cabinet 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 second surface 24 and the first surface 22 is on the same horizontal plane as the pivot axis P of the hinge assembly 3, the over-cabinet amount L is at its maximum, and then the over-cabinet amount L gradually decreases.

[0070] During the opening and closing of the door, the rotation of the hinge assembly 3 around the pivot axis P will not exceed its circumference. Assuming the radii of the first hinge bushing 311 and the second hinge bushing 321 are R3 and R4 respectively (in this embodiment, R3 = R4), and the radii of the first hinge bushing 311 and the second hinge bushing 321 are 5mm to 15mm (e.g., 5mm, 7mm, 10mm, 13mm, 15mm, etc.), it is sufficient to consider that the cutout boundary of the door body 2 is located around the cylinder, and that the upper surface of the door body 2 has a reserved boundary. The panel thickness is h1, where h1 ≥ 2mm, and the distance L3 from the pivot axis P to the second surface 24 is greater than h1 + R3.

[0071] The opening and closing device 100 of this utility model sets the pivot axis P of the first hinge seat 31 and the second hinge seat 32 in the mounting cavity 21 on the door body 2. This makes the rotation trajectory of the door body 2 closer to the box body 1 when it rotates around the pivot axis P, reducing the range of the door body 2 protruding outward during the opening process. This reduces the distance of the door body 2 beyond the back of the box body 1, allowing it to be placed against the wall. At the same time, it reduces the possibility of the door body 2 scraping against the wall during the opening process, improving the user experience.

[0072] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model 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 utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model 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; A door body is pivotally connected to the opening via a hinge assembly. The outer wall of the door body has a recessed mounting cavity that accommodates at least a portion of the hinge assembly. The hinge assembly includes a first hinge seat and a second hinge seat that are rotatably connected. The first hinge seat is connected to the door body, and the second hinge seat is connected to the housing. The pivot axes of the first hinge seat and the second hinge seat coincide and are located within the mounting cavity.

2. The opening and closing device according to claim 1, characterized in that, The hinge assembly has a first state and a second state that can switch between each other. In the first state, the door is closed, and in the second state, the door is open. The hinge assembly also includes an elastic element that cooperates with the first hinge seat and the second hinge seat respectively. The rebound force of the elastic element drives the hinge to have a tendency to switch from the first state to the second state.

3. The opening and closing device according to claim 2, characterized in that, The first hinge base includes a first hinge bushing and a first mounting plate, and the second hinge base includes a second hinge bushing and a second mounting plate. The first hinge bushing and the second hinge bushing are rotatably connected. The first mounting plate is connected to the end of the first hinge bushing away from the second hinge bushing. The first mounting plate is installed in the mounting cavity and connected to the door body. The second mounting plate is connected to the outer wall of the second hinge bushing and extends in a direction perpendicular to the pivot axis. The second mounting plate is connected to the housing.

4. The opening and closing device according to claim 3, characterized in that, The hinge assembly also includes a rotating shaft and a driving component; The rotating shaft is respectively inserted into the first hinge sleeve and the second hinge sleeve. The driving member is movably sleeved on the rotating shaft. The elastic member is sleeved on the end of the rotating shaft away from the first hinge sleeve and abuts against the driving member. The first hinge sleeve and the driving member are connected by a transmission structure. The transmission structure is configured to convert the rotational motion of the first hinge bushing into linear motion of the driving member along the axial direction of the rotation axis, and the elastic member, through the transmission structure, causes the first hinge bushing to have a tendency to switch from the first state to the second state.

5. The opening and closing device according to claim 2, characterized in that, The elastic element is a spring.

6. The opening and closing device according to claim 4, characterized in that, The transmission structure includes a first mating structure disposed on the first hinge bushing and a second mating structure disposed on the driving member. The first hinge bushing is capable of reciprocating within a preset angle range relative to the second hinge bushing around the pivot axis, so that the first mating structure and the second mating structure slide relative to each other, thereby causing the first hinge bushing and the second hinge bushing to rotate relative to each other.

7. The opening and closing device according to claim 6, characterized in that, The first mating structure has a first curved surface and a first mating surface, and the second mating structure has a second curved surface and a second mating surface. In the first state, the first mating surface abuts against the second mating surface, and in the second state, the first curved surface abuts against the second curved surface, so that the first hinge bushing and the second hinge bushing have a relative rotational force.

8. The opening and closing device according to claim 7, characterized in that, The first surface and / or the second surface are helical surfaces.

9. The opening and closing device according to claim 4, characterized in that, The driving member has a first stop on the side near the first hinge bushing, and the first hinge bushing has a first mating part on the side near the driving member. When the first hinge bushing and the second hinge bushing rotate relative to each other to the maximum opening angle, the first stop and the first mating part cooperate to abut against each other to restrict the relative rotation of the first hinge bushing and the second hinge bushing.

10. The opening and closing device according to claim 3, characterized in that, A second stop is provided on the outer wall surface of the first hinge bushing, and a second mating part is provided on the outer wall surface of the second hinge bushing. When the first hinge bushing and the second hinge bushing rotate relative to each other to the maximum opening angle, the second stop and the second mating part cooperate to abut against each other to restrict the relative rotation of the first hinge bushing and the second hinge bushing.

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