Door opening and closing device and electric appliance

Abstract

The application discloses a door opening and closing device and an electrical appliance. The door opening and closing device comprises a base, an output assembly, a connecting rod assembly and a driving assembly. The output assembly comprises an output shaft, the output shaft is rotatably connected with the base, the output shaft is used for being connected with a door body or a machine body of the electrical appliance, the machine body is rotatably installed on the machine body; the connecting rod assembly is rotatably installed on the base and is hinged with the output assembly; the driving assembly is used for driving the connecting rod assembly to rotate relative to the base so as to drive the output shaft to rotate, thereby driving the door body to rotate relative to the machine body of the electrical appliance. In this way, the door opening and closing device can be applied to the electrical appliance such as a refrigerator. When a user is inconvenient to manually pull open the door body, the door opening and closing device can drive the connecting rod assembly to rotate through the driving assembly, drive the output shaft to rotate and then drive the door body of the electrical appliance to rotate, so that the opening and closing of the door body are realized, and the convenience of use is improved.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a door opening and closing device and electrical equipment. Background Technology

[0002] Currently, with the development of intelligent design in home appliances, intelligent design has made refrigerators and other home appliances more closely integrated into consumers' daily lives, bringing convenience. However, in most of these appliances, the opening mechanism is still traditional, requiring the door to be pulled manually, which is inconvenient when users are holding items with both hands. Summary of the Invention

[0003] This application provides a door opening and closing device and an electrical appliance.

[0004] The door opening and closing device according to the embodiments of this application is used in electrical equipment, and the door opening and closing device includes:

[0005] Matrix;

[0006] An output component, the output component including an output shaft, the output shaft being rotatably connected to the base, the output shaft being used to connect to the door or body of the electrical equipment, the body being rotatably mounted on the body;

[0007] A linkage assembly, rotatably mounted on the base and hinged to the output assembly; and

[0008] A drive assembly is provided to drive the linkage assembly to rotate relative to the base so as to drive the output shaft to rotate, thereby driving the door body to rotate relative to the body of the electrical equipment.

[0009] In some embodiments, the output assembly further includes a drive wheel and an output wheel, both of which are rotatably mounted on the base.

[0010] The drive wheel is hinged to the connecting rod assembly, and the hinge point between the drive wheel and the connecting rod assembly is eccentrically located to the rotation center of the drive wheel.

[0011] The output wheel is poweredly connected to the drive wheel, the output shaft is fixedly connected to the output wheel, and the drive assembly is used to drive the linkage assembly to rotate so as to drive the drive wheel to rotate, thereby driving the output wheel and the output shaft to rotate.

[0012] In some embodiments, both the drive wheel and the output wheel are gears, and the drive wheel and the output wheel are power-connected; or

[0013] Both the drive wheel and the output wheel are pulleys, and the output assembly also includes a transmission belt, which is wound around the drive wheel and the output wheel.

[0014] In some embodiments, the linkage assembly includes an opening linkage group and a closing linkage group, the opening linkage group being hinged to the output assembly, the closing linkage group being hinged to the opening linkage group, and the drive assembly being capable of selectively driving the opening linkage group and the closing linkage group to rotate;

[0015] When the drive assembly drives the door opening linkage group to rotate, the door opening linkage group drives the output shaft to rotate in the first direction;

[0016] When the drive assembly drives the door closing linkage group to rotate, the door closing linkage group drives the door opening linkage group to rotate in the opposite direction, thereby driving the output shaft to rotate in a second direction, which is opposite to the first direction.

[0017] In some embodiments, the door opening linkage assembly includes a first link and a second link. The middle portion of the first link is hinged to the base, one end of the first link is hinged to the second link, and the other end can drive the first link to rotate under the drive of the drive assembly. One end of the second link is hinged to one end of the first link, and the other end is hinged to the output assembly. The drive assembly can drive the first link to rotate and drive the output assembly to rotate through the second link, thereby driving the output shaft to rotate along the first direction.

[0018] The closing linkage assembly is hinged to the first link, and the hinge point between the closing linkage assembly and the first link is located between the hinge point between the first link and the base and the hinge point between the first link and the second link; the power module can also drive the closing linkage assembly to rotate so as to drive the first link to rotate in the opposite direction, thereby driving the output component to rotate in the opposite direction through the second link so as to drive the output shaft to rotate in the second direction.

[0019] In some embodiments, the door closing linkage assembly includes a third link and a fourth link. One end of the third link is hinged to the first link, and the other end is hinged to the fourth link. The middle portion of the fourth link is hinged to the base. One end of the fourth link is hinged to the third link, and the other end can drive the fourth link to rotate under the drive of the drive assembly. This causes the first link to rotate via the third link, which in turn drives the output assembly to rotate in the opposite direction via the second link, thereby causing the output shaft to rotate in the second direction.

[0020] In some embodiments, the end of the fourth link away from the third link forms a cam portion, the cam portion being used to contact the drive assembly, the drive assembly being able to drive the fourth link to rotate via the cam portion.

[0021] In some embodiments, the drive assembly includes a drive unit and a drive slider, the drive unit being rotatably connected to the base, the drive slider being slidably connected to the base and in contact with the door opening linkage assembly, and the drive unit being able to selectively abut against the drive slider or the door closing linkage assembly;

[0022] When the driving part abuts against the driving slider, the driving part can drive the driving slider to slide relative to the base in a direction away from the driving assembly, thereby driving the door opening linkage to rotate so as to drive the output shaft of the output assembly to rotate in the first direction;

[0023] When the drive unit abuts against the door closing linkage assembly, the drive unit can drive the door closing linkage assembly to rotate, thereby causing the door opening linkage assembly to rotate in the opposite direction, which in turn causes the output shaft to rotate in the second direction.

[0024] In some embodiments, the door opening and closing device further includes an elastic mechanism mounted on the base and abutting the drive slider. The elastic mechanism is used to apply an elastic force to the drive slider to maintain the tendency of the drive slider to move toward the drive assembly. The drive unit is capable of abutting and driving the drive slider to slide away from the drive assembly against the elastic force.

[0025] In some embodiments, the drive assembly includes a drive motor and a drive cam. The drive motor is fixedly mounted on the base, and the drive cam is fixedly mounted on the motor shaft of the drive motor. The motor drives the drive cam to rotate and, through the drive cam, drives the linkage assembly to rotate relative to the base, thereby driving the output shaft to rotate, and thus driving the door to rotate relative to the machine body.

[0026] In some embodiments, when the door is in the closed state, the drive cam can extend at least partially out of the base body during rotation to abut against the door, thereby driving the door to rotate relative to the body.

[0027] The electrical equipment in the embodiments of this application includes:

[0028] Organism;

[0029] The door body, rotatably mounted on the machine body; and

[0030] In any of the above embodiments of the door opening and closing device, the output shaft is fixedly connected to the door body, and the drive assembly is used to drive the linkage assembly to rotate relative to the base body to drive the output shaft to rotate, thereby driving the door body to rotate relative to the machine body.

[0031] In the door opening and closing device and electrical equipment of the embodiments of this application, the base can be installed on the body of the electrical equipment, the output shaft is rotatably connected to the base, the door is rotatably installed on the body, and the drive assembly can drive the output shaft to rotate by driving the linkage assembly, thereby driving the door to rotate. Thus, the door opening and closing device can be applied to electrical equipment such as refrigerators. When it is inconvenient for the user to manually open the door, the door opening and closing device can drive the linkage assembly to rotate by the drive assembly, thereby driving the output shaft to rotate and thus driving the door of the electrical equipment to rotate, thereby realizing the opening and closing of the door, improving the convenience of use.

[0032] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0033] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0034] Figure 1 This is a three-dimensional structural schematic diagram of the electrical device according to an embodiment of this application;

[0035] Figure 2 This is a three-dimensional structural schematic diagram of the door opening and closing device according to an embodiment of this application;

[0036] Figure 3 This is an exploded view of the door opening and closing device according to an embodiment of this application;

[0037] Figure 4 This is a plan view of the door opening and closing device according to an embodiment of this application;

[0038] Figure 5 This is another planar schematic diagram of the door opening and closing device according to an embodiment of this application;

[0039] Figure 6 This is a three-dimensional schematic diagram of the door opening and closing device according to an embodiment of this application;

[0040] Figure 7 This is another perspective view of the door opening and closing device according to an embodiment of this application;

[0041] Figure 8 This is another three-dimensional schematic diagram of the door opening and closing device according to the embodiments of this application.

[0042] Explanation of key component symbols:

[0043] Electrical equipment 1000;

[0044] The following components are included: door opening / closing device 100, base 10, fixing plate 11, housing 12, slide 121, cover plate 13, output assembly 20, output shaft 21, drive wheel 22, output wheel 23, first bearing 24, second bearing 25, linkage assembly 30, door opening linkage group 31, first linkage 311, second linkage 312, door closing linkage group 32, third linkage 321, fourth linkage 322, cam part 3221, drive assembly 40, drive part 41, drive motor 411, drive cam 412, drive slider 42, elastic mechanism 50, first micro switch 60, second micro switch 70, and battery 80.

[0045] Body 200;

[0046] Door body 300. Detailed Implementation

[0047] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0048] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and therefore should not be construed as limiting this application.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] In this application, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Furthermore, while this application provides examples of various specific processes and materials, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0053] Please see Figure 1 The electrical equipment 1000 of this application includes a body 200, a door 300, and a door opening and closing device 100 of this application. The door 300 is rotatably mounted on the body 200. The door opening and closing device 100 can be installed on the top of the body 200 or the top of the door 300. The door opening and closing device 100 is used to drive the door 300 to rotate on the body 200 to realize the opening and closing of the door 300.

[0054] Please see Figures 2-5The door opening and closing device 100 of this application includes a base 10, an output assembly 20, a linkage assembly 30, and a drive assembly 40. The base 10 can be mounted on the body 200 or the door 300 of the electrical equipment 1000. The output assembly 20 may include an output shaft 21, which is rotatably connected to the base 10 and is used to connect to the door 300 or the body 200 of the electrical equipment 1000. The door 300 is rotatably mounted on the body 200. The linkage assembly 30 is rotatably mounted on the base 10 and is hinged to the output assembly 20. The drive assembly 40 is used to drive the linkage assembly 30 to rotate relative to the base 10 to drive the output shaft 21 to rotate, thereby driving the door 300 to rotate relative to the body 200.

[0055] Understandably, with the development of intelligent design in home appliances, refrigerators are becoming more integrated into consumers' daily lives, bringing them convenience. However, most refrigerators still use traditional door opening methods, requiring users to manually pull the door 300 degrees, which is very inconvenient when holding items with both hands.

[0056] In the door opening / closing device 100 and electrical appliance 1000 of this application embodiment, the base 10 can be mounted on the body 200 of the electrical appliance 1000, the output shaft 21 is rotatably connected to the base 10, and the door 300 is rotatably mounted on the body 200. The drive assembly 40 can drive the output shaft 21 to rotate by driving the linkage assembly 30, thereby driving the door 300 to rotate. Thus, the door opening / closing device 100 can be applied to electrical appliances such as refrigerators 1000. When it is inconvenient for the user to manually open the door 300, the door opening / closing device 100 can drive the linkage assembly 30 to rotate by the drive assembly 40, thereby driving the output shaft 21 to rotate and thus driving the door 300 of the electrical appliance 1000 to rotate, thereby opening and closing the door 300, improving ease of use.

[0057] Specifically, the electrical device 1000 in this application includes, but is not limited to, household appliances such as refrigerators. The electrical device 1000 can also be any other electrical device 1000 having a door 300 and a body 200 and possessing a door 300 opening and closing function; no specific limitations are imposed here. In this document, a refrigerator is used as an example of the electrical device 1000 for description. The refrigerator can be a single-door refrigerator or a double-door refrigerator; no limitations are imposed here. Taking a single-door refrigerator as an example, the body 200 has a storage compartment for storing items. In one example, the storage compartment can be a refrigerator compartment and a freezer compartment, etc. One side of the door 300 is usually hinged to the body 200 via a pivot, allowing the door 300 to rotate relative to the body 200 to open and close.

[0058] Please see Figure 2In some embodiments, the base 10 may include a fixing plate 11, a housing 12, and a cover plate 13. The housing 12 is mounted on the fixing plate 11, the output assembly 20 is also mounted on the fixing plate 11, and the linkage assembly 30 is mounted on both the housing 12 and the fixing plate 11. The cover plate 13 can cover the housing 12 and enclose the output assembly 20 and the linkage assembly 30. The drive motor 411 can be mounted on the fixing plate 11, and the drive slider 42 is slidably connected to the fixing plate 11 and the housing 12. In this way, all components of the door opening and closing device 100 are installed inside the base 10. The base 10 can install the door opening and closing device 100 as a complete module on the body 200 or the door 300 of the electrical equipment 1000 without adding other structures to the body 200 or the door 300. This facilitates disassembly, ensures compatibility with different models, and provides high versatility. Furthermore, as the main support and mounting body of the entire door opening and closing device 100, the base 100, in order to ensure the stability of support and installation, can have its fixing plate 11, housing 12, and cover plate 13 made of high-strength metal materials. In one possible embodiment, the base 10 can be supported by lightweight aluminum alloy. Of course, in some embodiments, the base 10 can also be made of high-strength non-metallic materials; there are no specific limitations here, as long as the installation requirements are met. It is understood that in some embodiments, the base 10 may only include the fixing plate 11 without the housing 12 and cover plate 13, or only include the fixing plate 11 and housing 12; the specific configuration can be selected according to the actual situation, and there are no specific limitations here.

[0059] In this application, the door opening / closing device 100 can be installed as a separate module on the top of the body 200 or the door 300 near the pivot of the door 300. In some embodiments, the base 10 of the door opening / closing device 100 can be fixedly installed at the top corner of the door 300. In this case, the output shaft 21 can be coaxially fixed with the pivot on the body 200. Thus, when the output shaft 21 rotates, since the output shaft 21 is fixedly connected to the body 200, the torque transmitted by the output shaft 21 will drive the entire door 300 relative to the body 200 to achieve automatic door opening and closing. In this case, while the door opening / closing device 100 drives the door 300 to rotate, the door opening / closing device 100 also rotates as a whole with the door 300 relative to the body 200. Of course, it is understandable that in some embodiments, gears for transmission can also be provided on the door body 300, and gears that mesh with the gears on the door body 300 can also be provided on the rotating shaft of the machine body 200. In this way, when the output shaft 21 rotates, the output shaft 21 will drive the gears on the door body 300 to rotate, thereby driving the entire door body 300 and the door opening and closing device 100 to rotate relative to the machine body 200.

[0060] Alternatively, it can be understood that in other embodiments, the base 10 of the door opening / closing device 100 can be fixedly mounted at a corner of the top of the body 200, and the output shaft 21 can be coaxially fixedly mounted with the rotating shaft on the door body 300. In this way, when the output shaft 21 rotates, since it is fixedly connected to the rotating shaft of the door body 300, the rotation of the output shaft 21 will drive the door body 300 to rotate, thus achieving automatic door opening and closing. In this case, the door opening / closing device 100 will not rotate with the door body 300 when it rotates. Of course, in some embodiments, a gear for transmission can be provided on the body 200, and a gear meshing with the gear on the rotating shaft of the door body 300 can also be provided. In this way, when the output shaft 21 rotates, it will drive the gear on the body 300 to rotate, thereby driving the door body 300 to rotate via the gear.

[0061] In the embodiments of this application, the specific installation position of the door opening and closing device 100 is not limited, as long as it can drive the door body 300 to rotate.

[0062] Please see Figures 4 to 8 In some embodiments, the output assembly 20 further includes an output wheel 23 and a drive wheel 22, the drive wheel 22 being rotatably mounted on the base 10, and the output wheel 23 being rotatably mounted on the base 10.

[0063] The connecting rod assembly 30 and the drive wheel 22 are hinged, and the hinge point between the drive wheel 22 and the connecting rod assembly 30 is eccentrically positioned relative to the rotation center of the drive wheel 22. The output wheel 23 is poweredly connected to the drive wheel 22, and the output shaft 21 is fixedly connected to the output wheel 23. The drive assembly 40 is used to drive the connecting rod assembly 30 to rotate, thereby causing the drive wheel 22 to rotate, which in turn causes the output wheel 23 and the output shaft 21 to rotate.

[0064] Thus, when the linkage assembly 30 rotates, the linkage assembly 30 will drive the drive wheel 22 to rotate, the drive wheel 22 will drive the output wheel 23 to rotate, and the output shaft 21 will rotate synchronously with the output wheel 23. The output wheel 23 will then drive the door body 300 to rotate on the machine body 200 through the output shaft 21 to realize the door opening and closing action.

[0065] Specifically, in the embodiments of this application, "power connection between output wheel 23 and drive wheel 22" can be understood as either direct contact between the two to achieve power transmission or indirect contact between the two through an intermediate connecting element to achieve power transmission. In one possible embodiment, both output wheel 23 and drive wheel 22 can be gears, directly meshing together or indirectly meshing through an intermediate transmission gear. In another embodiment, output wheel 23 and drive wheel 22 can also be pulleys, with transmission between them achieved through a transmission belt. Furthermore, in some embodiments, both output wheel 23 and drive wheel 22 can also be sprockets, with power transmission between them achieved through a transmission chain. This application does not limit the transmission method between output wheel 23 and drive wheel 22, as long as power transmission between them is possible.

[0066] In this embodiment, the output assembly 20 may further include a first bearing 24 and a second bearing 25. The central shaft portion of the drive wheel 22 can be connected to the first bearing 24 to rotatably support the drive wheel 22 on the base 10, ensuring the stability of the drive wheel 22's rotation. The central shaft portion of the output wheel 23 can be connected to the second bearing 25 to rotatably support the output wheel 23 on the base 10, ensuring the stability of the drive wheel 22's rotation. The output shaft 21 can be coaxially fixedly connected to the central shaft portion of the output wheel 23. That is to say, the output shaft 21 rotates coaxially with the output shaft 23. "Coaxial" can be understood as the axes of the two completely coinciding or the distance between the axes of the two being within the allowable range of assembly error. If the same or similar description appears below, it can also be understood here. In this application, there is no specific limitation on the type of the first bearing 24 and the second bearing 25. They can be ball bearings, tapered roller bearings, cylindrical roller bearings, etc., as long as they can meet the support requirements.

[0067] It is understood that, in the embodiments of this application, the eccentricity between the hinge point between the connecting rod assembly 30 and the drive wheel 22 and the center of the rotation axis of the drive wheel 22 when it rotates can ensure that the connecting rod assembly 30 can drive the drive wheel 22 to rotate when it rotates.

[0068] Preferably, in this application, the hinge point between the linkage assembly 30 and the drive wheel 22 can be located at the outer edge of the drive wheel 22. The greater the distance between the hinge point and the center of the drive wheel 22, the better. In this way, the linkage assembly 30 can drive the drive wheel 22 to achieve a large rotational stroke with a small rotation, that is, through the cooperative arrangement of the linkage assembly 30 and the drive wheel 22, a large opening and closing stroke of the door 300 can be achieved within a small volume.

[0069] Please see Figures 4-8In some embodiments, both the drive wheel 22 and the output wheel 23 are gears, and the drive wheel 22 and the output wheel 23 are connected by a power connection.

[0070] In this way, power transmission between the drive wheel 22 and the output wheel 23 can be achieved through gear transmission. Gear transmission has high stability and can provide high torque, thereby ensuring the stability of the door 300 opening and closing.

[0071] Specifically, in Figures 4-8 In the illustrated embodiment, both the drive wheel 22 and the output wheel 23 are external gears, directly meshed together. It is understood that, in order to enable the door 300 to have a larger rotational stroke when the drive wheel 22 rotates at a smaller angle, in this application, the pitch circle diameter of the drive wheel 22 is larger than that of the output wheel 23, and the number of teeth on the drive wheel 22 is greater than the number of teeth on the output wheel 23. That is, the radial dimension of the drive wheel 22 is greater than the radial dimension of the output wheel 23. Thus, when the drive wheel 22 rotates at a smaller angle, the output wheel 23 can rotate at a larger angle under the drive of the drive wheel 22, thereby achieving a large-stroke opening and closing of the door 300. This allows for a larger opening and closing stroke of the door 300 within a smaller volume. For example, in one instance, when the drive wheel 22 rotates 10°, the output wheel 23 can rotate 30° or even more under the drive of the drive wheel 22, thereby enabling the door 300 to rotate at a corresponding angle.

[0072] Of course, it is understandable that in some embodiments, the drive wheel 22 and the output wheel 23 may not be directly meshed together. Instead, a rotatable transmission gear is provided on the base 10. The number of transmission gears can be one or more. The drive wheel 22 and the output wheel 23 can be connected by one or more transmission gears meshing together in sequence to achieve power transmission. No specific restrictions are imposed here.

[0073] Of course, it is understandable that in some embodiments, both the drive wheel 22 and the output wheel 23 may be pulleys, and the output assembly 20 may also include a transmission belt wound around the drive wheel 22 and the output wheel 23. In this way, power transmission can also be achieved through belt drive.

[0074] Specifically, in this implementation method, the transmission belt can be either a flat belt or a V-belt to achieve flat belt drive over V-belt drive. Similarly, in order to ensure that the drive wheel 22 can drive the output wheel 23 to rotate a large angle with a small angle to achieve a large stroke opening and closing of the door 300, in this implementation method, the diameter of the drive wheel 22 is larger than the diameter of the output wheel 23.

[0075] Please see Figure 4 and Figure 5In some embodiments, the linkage assembly 30 includes an opening linkage 31 and a closing linkage 32. The opening linkage 31 is hinged to the output assembly 20, and the closing linkage 32 is hinged to the opening linkage 31. The drive assembly 40 can selectively drive the opening linkage 31 and the closing linkage 32 to rotate. When the drive assembly 40 drives the opening linkage 31 to rotate, the opening linkage 31 drives the output shaft 21 to rotate in a first direction. When the drive assembly 40 drives the closing linkage 32 to rotate, the closing linkage 32 drives the opening linkage 31 to rotate in the opposite direction, thereby driving the output shaft 21 to rotate in a second direction, which is opposite to the first direction.

[0076] Thus, when opening the door, the door 300 can be opened simply by driving the opening linkage group 31 through the drive component 40. When closing the door, the closing linkage group 32 can be driven by the drive component 40, thereby causing the opening linkage group 31 to rotate in the opposite direction to achieve the closing action. Both the opening and closing actions are performed by the opening linkage group 31, without the need for an additional closing drive structure.

[0077] Specifically, in such an embodiment, when the hinge between the door 300 and the body 200 is located on the right side of the door 300 and the body 200, in a downward view from the top of the body 200, the first direction is counterclockwise and the second direction is clockwise.

[0078] In this embodiment, the door opening linkage 31 can be hinged to the drive wheel 22 of the output component 20. In this way, when the drive component 40 directly drives the door opening linkage 31 to move, the door opening linkage 31 will drive the drive wheel 22 to rotate. The drive wheel 22 rotates through the output wheel 23 to realize the opening of the door 300.

[0079] When the drive assembly 40 is separated from the door opening linkage group 31 and the door closing linkage group 32 is driven to move, since the door closing linkage group 32 is hinged to the door opening linkage group 31, the door closing linkage group 32 will drive the door opening linkage group 31 to rotate in the opposite direction when it moves, thereby driving the drive wheel 22 to rotate in the opposite direction. The drive wheel 22 then drives the output shaft 21 to rotate in the opposite direction through the output wheel 23 to achieve the closing of the door 300.

[0080] Further, please refer to Figures 4-8In some embodiments, the door opening linkage assembly 31 includes a first link 311 and a second link 312. The middle portion of the first link 311 is hinged to the base 10, one end of the first link 311 is hinged to the second link 312, and the other end can drive the first link 311 to rotate under the drive of the drive assembly 40. One end of the second link 312 is hinged to one end of the first link 311, and the other end is hinged to the output assembly 20. The drive assembly 40 can drive the first link 311 to rotate and drive the output assembly 20 to rotate through the second link 312, thereby driving the output shaft 21 to rotate in the first direction.

[0081] The closing linkage assembly 32 is hinged to the first link 311. The hinge point between the closing linkage assembly 32 and the first link 311 is located between the hinge point between the first link 311 and the base 10 and the hinge point between the first link 311 and the second link 312. The power module can also drive the closing linkage assembly 32 to rotate, thereby causing the first link 311 to rotate in the opposite direction. This, in turn, drives the output assembly 20 to rotate in the opposite direction via the second link 312, thereby causing the output shaft 21 to rotate in the second direction.

[0082] Thus, by setting two hinged second links 312 and a first link 311, the door 300 can be opened. When closing the door, the door 300 can be closed simply by using the closing link group 32 to drive the first link 311 to rotate in the opposite direction. The structure is relatively simple.

[0083] Specifically, in this embodiment, the end of the second link 312 away from the first link 311 is hinged to the drive wheel 22. When the door is opened, the end of the first link 311 away from the second link 312 moves under the drive of the drive assembly 40, causing the first link 311 to rotate on the base 10. When the first link 311 rotates, it drives the second link 312 to move. The second link 312 drives the drive wheel 22 to rotate on the base 10. The drive wheel 22 drives the output wheel 23 and the output shaft 21 to rotate in the first direction. When the door is closed, the drive assembly 40 only needs to drive the closing link assembly 32 to rotate, which will drive the first link 311 to rotate in the opposite direction to the opening direction. The second link 311 then drives the drive wheel 22 to rotate in the opposite direction through the second link 312. The drive wheel 22 then drives the output wheel 23 and the output shaft 21 to rotate in the opposite direction to the first direction (i.e., the second direction). In this way, the automatic door opening and closing action can be achieved simply by driving the first link 311 to rotate in both directions under different conditions.

[0084] It is understood that in some embodiments, the door opening linkage 31 is not limited to including the second linkage 312 and the first linkage 311.

[0085] Specifically, in some cases, other connecting rods may be connected between the second connecting rod 312 and the first connecting rod 311. In one possible embodiment, a connecting rod may be further connected between the first connecting rod 311 and the second connecting rod 312, with its two ends hinged to the second connecting rod 312 and the first connecting rod 311, respectively. When the first connecting rod 311 is activated, this connecting rod is activated under the drive of the first connecting rod 311, thereby driving the second connecting rod 312 to perform the door opening action. It is understood that in this application, it is only necessary to be able to drive the drive wheel 22 of the output component 20 to rotate, and there is no specific limitation on the number of connecting rods. Of course, in order to save manufacturing costs, the fewer the number of connecting rods in the door closing linkage group 32, the better.

[0086] Please see Figures 4-8 In some embodiments, the door closing linkage assembly 32 includes a third link 321 and a fourth link 322. One end of the third link 321 is hinged to the first link 311, and the other end is hinged to the fourth link 322. The middle part of the fourth link 322 is hinged to the base 10. One end of the fourth link 322 is hinged to the third link 321, and the other end can drive the fourth link 322 to rotate under the drive of the drive assembly 40. This causes the first link 311 to rotate through the third link 321, which in turn drives the output assembly 20 to rotate in the opposite direction through the second link 312, thereby causing the output shaft 21 to rotate in the second direction.

[0087] Thus, by setting two hinged fourth links 322 and third links 321, with the third link 321 hinged to the first link 311, the fourth link 322 can move under the drive of the drive assembly 40, thereby driving the third link 321 to move. The third link 321 then drives the first link 311 to rotate, thereby achieving the reverse rotation of the output shaft 21 and thus realizing the door closing action.

[0088] Understandably, in this implementation, when the door is opened, the drive assembly 40 acts directly or through other components to the first link 311 to rotate the first link 311, thereby achieving the door opening action. When the door is closed, the drive assembly 40 acts on the fourth link 322. When the fourth link 322 rotates, it drives the third link 321 to move. The third link 321 then drives the first link 311 to rotate in the opposite direction to achieve the door closing action.

[0089] Of course, it is understood that in some embodiments, the closing linkage assembly 32 is not limited to including the fourth link 322 and the third link 321. That is to say, in some embodiments, other links may be connected between the fourth link 322 and the third link 321. For example, in one possible embodiment, a link may be connected between the fourth link 322 and the third link 321. The two ends of this link may be hinged to the fourth link 322 and the third link 321 respectively. When the fourth link 322 rotates, it can drive the third link 321 to perform the closing action. It is understood that in this application, it is only necessary that the fourth link 322 can drive the first link 311 to rotate in the opposite direction when driven by the drive assembly 40. The number of links in the closing linkage assembly 32 is not limited. Of course, to save manufacturing costs, the fewer links in the closing linkage assembly 32, the better.

[0090] Please see Figure 4 and Figure 5 In some embodiments, the end of the fourth link 322 away from the third link 321 forms a cam portion 3221, which is used to contact the drive assembly 40, and the drive assembly 40 can drive the fourth link 322 to rotate through the cam portion 3221.

[0091] Thus, by contacting the drive assembly 40 through the cam portion 3221, the drive of the fourth link 322 can be better achieved.

[0092] Specifically, in such an embodiment, the drive assembly 40 may include a drive cam 412, which can drive the cam portion 3221 of the first link 311 and the fourth link 322 during rotation. When the drive cam 412 drives the first link 311 to rotate, the door 300 is opened. When the drive cam 412 drives the cam portion 3221 to rotate, the fourth link 322 drives the third link 321 to move, and the third link 321 drives the first link 311 to reverse so as to close the door 300.

[0093] Please see Figures 4-8 In some embodiments, the drive assembly 40 includes a drive part 41 and a drive slider 42. The drive part 41 is rotatably connected to the base 10, and the drive slider 42 is slidably connected to the base 10 and contacts the door opening linkage 31. The drive part 41 can selectively abut against the drive slider 42 or the door closing linkage 32.

[0094] When the drive unit 41 abuts against the drive slider 42, the drive unit 41 can drive the drive slider 42 to slide relative to the base 10 in a direction away from the drive assembly 40, thereby driving the door opening linkage 31 to rotate so as to drive the output shaft 21 of the output assembly 20 to rotate in the first direction.

[0095] When the drive unit 41 abuts against the door closing linkage assembly 32, the drive unit 41 can drive the door closing linkage assembly 32 to rotate, thereby causing the door opening linkage assembly 31 30 to rotate in the opposite direction, thereby causing the output shaft 21 to rotate in the second direction.

[0096] Thus, the drive slider 42 contacts the door opening bar assembly, and the drive unit 41 can drive the slider 42 to slide to drive the door opening linkage assembly 31 to rotate, thereby causing the output shaft 21 to rotate in the first direction to realize the door opening action.

[0097] Specifically, in this embodiment, a groove 121 may be provided on the base 10. The groove 121 extends in a direction away from the drive assembly 40. The drive slider 42 is slidably connected to the groove 121 and can slide along the groove 121. The first link 311 of the door opening linkage assembly 31 contacts the drive slider 42. When the drive unit 41 drives the drive slider 42 to slide, the drive slider 42 will drive one end of the first link 311 to rotate, thereby driving the entire first link 311 to rotate. When the first link 311 rotates, it drives the second link 312 to rotate, thereby driving the drive wheel 22 to rotate. The drive wheel 22 then drives the output shaft 21 to rotate in the first direction through the output wheel 23 to realize the door opening action.

[0098] When the drive unit 41 separates from the drive slider 42 and abuts against the door closing linkage group 32, the drive unit 41 abuts against the fourth link 322 of the door closing linkage group 32. The drive unit 41 drives the fourth link 322 to rotate, and the fourth link 32 drives the third link 321 to move. The third link 321 drives the first link 311 to rotate in the opposite direction. The first link 311 rotates in the opposite direction, causing the output shaft 21 to rotate in the opposite direction to the first direction (i.e., the second direction) to realize the door closing action.

[0099] Please see Figures 6 to 8 In some embodiments, the door opening and closing device 100 further includes an elastic mechanism 50, which is mounted on the base 10 and abuts against the drive slider 42. The elastic mechanism 50 is used to apply an elastic force to the drive slider 42 so that the drive slider 42 tends to move toward the drive assembly 40. The drive assembly 40 is able to abut against and drive the drive slider 42 to slide away from the drive assembly 40 against the elastic force.

[0100] Thus, when the door is opened, the drive unit 41 can cause the drive slider 42 to overcome the elastic force of the elastic mechanism 50 to achieve the rotation of the first link 311. When the door is closed, the drive unit 41 separates from the drive slider 42 and abuts against the fourth link 322 of the closing link assembly 32. Under the action of the elastic mechanism 50, the drive slider 42 gradually resets and separates from one end of the first link 311. The fourth link 322 rotates under the drive of the drive unit 41 to drive the first link 311 to rotate in the opposite direction.

[0101] Specifically, in this embodiment, the elastic mechanism 50 can be any elastic element, including but not limited to a spring. It only needs to be able to apply an elastic force to the drive slider 42. Taking a spring as an example, the spring can be mounted on the housing 12 of the base 10, with both ends of the spring abutting against the inner wall of the housing and the drive slider 42, respectively. It can be understood that in this embodiment, when the door 300 is in the closed state, one end of the first connecting rod 311 contacts the drive slider 42. During the movement of the drive slider 42 driven by the drive unit 41, the drive slider 42 drives the first connecting rod 311 to move, thereby realizing the opening action.

[0102] When the door needs to be closed, the drive unit 41 separates from the drive slider 42 and abuts against the fourth link 322. At this time, the drive slider 42 slides towards the side where the drive assembly 40 is located under the action of the elastic mechanism 50 and separates from one end of the first link 311. The fourth link 322 rotates under the drive of the drive unit 41 and drives the first link 311 to rotate in the opposite direction through the third link 321 to realize the door closing action. During this process, the end of the first link 311 close to the drive slider 42 moves towards the drive slider 42 and finally abuts against the drive slider 42 so as to carry out the next door opening action.

[0103] Of course, it is understood that in some embodiments, instead of providing the aforementioned drive slider 42, a supporting portion is formed at one end of the first connecting rod 311. This supporting portion is used to abut against the drive unit 41 so that the drive unit 41 can drive the first connecting rod 311 to rotate. In this case, an arc-shaped guide groove 121 can be formed on the base 10. The first connecting rod 311 can cooperate with the guide groove 121. When the drive unit 41 drives the first connecting rod 311 to rotate, the rotation trajectory of the first connecting rod 311 corresponds to the guide groove 121. No specific limitations are made here.

[0104] Please see Figure 4 and Figure 5 In some embodiments, the door opening and closing device 100 may further include a first micro switch 60, which is disposed on the base 10. The first micro switch 60 is electrically connected to the drive assembly 40 and can be triggered by the drive slider 42. When the drive slider 42 triggers the first micro switch 60, the first micro switch 60 controls the drive assembly 40 to stop working.

[0105] Thus, during the opening of the door 300, after the drive slider 42 triggers the first micro switch 60, it indicates that the door 300 has been opened to the maximum position. At this time, the first micro switch 60 disconnects the power supply to the drive assembly 40, causing the drive assembly 40 to stop working, so as to avoid the drive assembly 40 still outputting rotational torque after the door 300 has been opened to the maximum angle, which would cause it to stall and get stuck.

[0106] Of course, it is understandable that in the above-mentioned technical solution that does not require setting a drive slider 42, the first micro switch 60 can also be set on the rotation path of the first link 311. After the first link 311 rotates and moves by an angle, the first link 311 can directly trigger the first micro switch 60.

[0107] Please see Figure 4 and Figure 5 The door opening and closing device 100 may also include a second micro switch 70, which is disposed on the base 10. The second micro switch 70 is electrically connected to the drive assembly 40 and can be triggered by the door closing linkage group 32. When the door closing linkage group 32 triggers the second micro switch 70, the second micro switch 70 controls the drive assembly 40 to stop working.

[0108] Thus, during the closing process of the door 300, after the closing linkage group 32 triggers the first micro switch 60, it indicates that the door 300 has been closed. At this time, the second micro switch 70 disconnects the power supply to the drive assembly 40, causing the drive assembly 40 to stop working, so as to avoid the drive assembly 40 from still outputting rotational torque after the door 300 is completely closed, which would cause it to stall and get stuck.

[0109] Specifically, in such an embodiment, the second micro switch 70 can be located on the rotation path of the cam portion 3221 of the fourth link 322. During the process of the drive assembly 40 driving the cam portion 3221 to rotate to achieve door closing, after the cam portion 3221 triggers the second micro switch 70, it indicates that the door body 300 has been closed in place and the drive assembly 40 can be controlled to stop operating.

[0110] Please see Figures 4-8 In some embodiments, the drive assembly 40 may include a drive motor 411 and a drive cam 412. The drive motor 411 is fixedly mounted on the base 10, and the drive cam 412 is fixedly mounted on the motor shaft of the drive motor 411. The motor is used to drive the drive cam 412 to rotate and drive the connecting rod assembly 30 to rotate relative to the base 10, thereby driving the output shaft 21 to rotate, and thus driving the door 300 to rotate relative to the machine body 200.

[0111] Thus, by driving the output shaft 21 through the drive cam 412 and the linkage assembly 30 to achieve the door opening and closing action, a large opening and closing effect can be achieved within a small volume.

[0112] Specifically, in such an embodiment, when the drive assembly 40 has the aforementioned drive slider 42, the drive unit 41 includes a drive cam 412 and a drive motor 411. When the door 300 needs to be opened in the closed state, the drive motor 411 drives the drive cam 412 to rotate, the drive cam 412 drives the drive slider 42 to slide, and the drive slider 42 drives the first link 311 to rotate while sliding. The first link 311 then drives the second link 312 to move, and the second link 312 drives the drive wheel 22 to rotate. The drive wheel 22 drives the output wheel 23 and the output shaft 21 to rotate in the first direction to realize the door opening action.

[0113] At this time, when the door needs to be closed, the drive cam 412 can gradually separate from the drive slider 42 under the drive of the drive motor 411, and gradually contact the cam part 3221 of the fourth link 322. Thus, the cam part 3221 drives the fourth link 322 to rotate, and the fourth link 322 drives the first link 311 to rotate in the opposite direction through the third link 321. In this way, the first link 311 can drive the drive wheel 22 to rotate in the opposite direction through the second link 312, thereby driving the output wheel 23 and the output shaft 21 to rotate in the second direction to realize the door closing action.

[0114] In addition, since there is a dead point position between the drive cam 412 and the cam portion 3221, in order to avoid the drive cam 412 being at the dead point position when it first contacts the cam portion 3221 and thus failing to drive the cam portion 3221 to rotate, in some embodiments, as the drive cam 412 gradually separates from the drive slider 42, the elastic mechanism 50 can drive the drive slider 42 to move toward the side where the drive assembly 40 is located, thereby abutting against the cam portion 3221 of the fourth link 322 and driving the cam portion 3221 to rotate. This makes the drive cam 412 miss the dead point position on the cam portion 3221 when it contacts the cam portion 3221, so that the drive cam 412 can smoothly drive the cam portion 3221 to rotate and realize the door closing action.

[0115] In some embodiments, a recess may be formed on the cam portion 3221. After the drive cam 412 and the drive slider 42 gradually separate, the drive cam 412 abuts against the recess on the cam portion 3221, thereby enabling the drive cam 412 to better drive the cam portion 3221 to rotate.

[0116] In addition, it is understood that in other embodiments, the drive assembly 40 may not use the drive cam 412 described above for driving, but instead use an eccentric crank-connecting rod assembly to drive the drive cam 412. In this way, the drive assembly 40 and the connecting rod assembly 30 form a pure connecting rod assembly, which can increase the rigidity of the drive.

[0117] Please see Figure 7In some embodiments, when the door 300 is in the closed state, the drive cam 412 can extend at least partially outside the base 10 during rotation to abut against the door 300 or the body 200, thereby driving the door 300 to rotate relative to the body 200.

[0118] Thus, when the door needs to be opened, the drive cam 412 can first press against the door body 300 or the machine body 200 to open the door body 300 a gap so that the door can be opened through the linkage assembly 30.

[0119] Specifically, in household appliances such as refrigerators, magnetic sealing strips are usually installed on the door 300 and the body 200 to ensure a sealing effect between the door 300 and the body 200. There is a strong attraction between the two, and since there may be gas flow inside the body 200, negative pressure may be formed, causing the door 300 to be tightly attracted to the body 200. In this case, when opening the door, the drive cam 412 of the door opening and closing device 100 can first push the door 300 open a gap to facilitate the subsequent door opening process.

[0120] Understandably, in this situation, since the door 300 is already slightly open before the linkage assembly 30 performs the opening action, the closing stroke of the linkage assembly 30 can be set to be slightly larger than the opening stroke during the closing process. This allows the door 300 to be completely closed when closing. Of course, in some embodiments, the opening and closing strokes can be set to be the same. After the linkage assembly 30 performs the closing action, the door 300 can be completely closed by relying on the magnetism between the door 300 and the body 200. Specific details are not limited here.

[0121] Understandably, in such an implementation, when the door opening and closing device 100 is installed on the door body 300, the drive cam 412 extends out of the base 10 to abut against the body 200 and thus pushes the door body 300 open; when the door opening and closing device 100 is installed on the body 200, the drive cam 412 extends into the base 10 to abut against the door body 300 and thus pushes the door body 300 open.

[0122] In some embodiments, the door opening / closing device 100 may further include a battery 80, a motor that can be mounted on the housing 12, the battery 80 powering the drive motor 411 of the drive assembly 40, and a cover plate 13 covering the battery 80. Thus, the drive assembly 40 can be powered by a separate power supply.

[0123] Below, based on the above content, in order to provide a detailed description of the opening and closing process of the electrical equipment 1000 of this application, the electrical equipment 1000 of this application embodiment has four modes: automatic opening, automatic closing, manual opening, and manual closing. The four modes are described below.

[0124] In automatic door opening mode, please refer to Figures 6 to 8 , Figure 6 This is a schematic diagram showing the state of the door opening and closing device 100 when it is basically in the closed state. Figure 7 This is a schematic diagram showing the state of the door opening / closing device 100 during the door opening process. Figure 8 This is a schematic diagram showing the door opening / closing device in the open position. Figure 6 Based on this, when automatic door opening is required, the drive motor 411 drives the drive cam 412 to rotate, and the drive cam 412 rotates to... Figure 7 At the aforementioned position, the drive cam 412 abuts against the body 200, and the door 300 is pushed open. Subsequently, the drive cam 412 continues to rotate, and after rotating a certain angle, it contacts the drive slider 42. The drive cam 412 drives the drive slider 42 to slide in a directional manner according to the groove 121 on the base 10. During sliding, the drive slider 42 drives the first connecting rod 311 to rotate. The first connecting rod 311, through the second connecting rod 312, drives the drive wheel 22 to rotate. The drive wheel 22 drives the output wheel 23 and the output shaft 21 to rotate. The output shaft 21 then drives the door 300 to rotate relative to the body 200 to achieve the opening action (e.g., ...). Figure 8 As shown), after the drive slider 42 triggers the first micro switch 60 on the base 10, the drive motor 411 is de-energized and stops driving, that is, from Figure 6 The status shown has switched to Figure 8 The state shown.

[0125] In automatic closing mode, drive motor 411 continues to drive drive cam 412 to rotate. After drive cam 412 separates from drive slider 42, it contacts cam portion 3221 of fourth link 322 of closing linkage assembly 32 and drives fourth link 322 to rotate. When fourth link 322 rotates, it drives first link 311 to rotate in the opposite direction through third link 321, thereby driving drive wheel 22 to rotate in the opposite direction through second link 312. Drive wheel 22 then drives output wheel 23 and output shaft 21 to rotate in the opposite direction. Output shaft 21 drives door body 300 to rotate in the opposite direction to achieve closing action (e.g., Figure 6 As shown), until the cam 3221 on the fourth link 322 triggers the second micro switch 70 on the base 10, the drive motor 411 is de-energized and stops driving, that is, from Figure 8 The status shown has switched to Figure 6 The state shown.

[0126] When the door is opened manually, the user pulls the door body 300. The door body 300 drives the opening linkage group 31 to rotate in the opposite direction through the output shaft 21, output wheel 23 and drive wheel 22. The first link 311 of the opening linkage group 31 disconnects from the drive slider 42 and rotates to the side away from the drive slider 42. The drive slider 42 is only in contact with the drive cam 412 under the action of the elastic mechanism 50. Of course, during this process, the closing linkage group 32 will also rotate under the drive of the opening linkage group 31. After the door is opened, the cam part 3221 of the fourth link 322 of the closing linkage group 32 and the drive slider 42 together restrict the position of the drive cam 412.

[0127] When manually closing the door, the user manually closes the door 300. The door 300 drives the opening linkage assembly 31 to rotate in the opposite direction via the output shaft 21, output wheel 23, and drive wheel 22. The first link 311 of the opening linkage assembly 31 rotates towards the side closer to the drive slider 42 to achieve the manual opening action. It can be understood that during this process, the first link 311 drives the fourth link 322 to rotate via the third link 321. After the door 300 is closed, the cam portion 3221 on the fourth link 322 contacts the second micro switch 70.

[0128] It is understood that in this application, the electrical equipment 1000 can be in automatic on / off mode, manual on / off mode, manual door opening + automatic door closing mode, and manual door closing + automatic door opening mode.

[0129] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0130] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A door opening and closing device for use in electrical equipment, characterized in that, The door opening and closing device includes: Matrix; An output component, the output component including an output shaft rotatably connected to the base, the output shaft being used to connect to the door or body of the electrical equipment, the door being rotatably mounted on the body; A linkage assembly, rotatably mounted on the base and hinged to the output assembly; and A drive assembly is used to drive the linkage assembly to rotate relative to the base to drive the output shaft to rotate, thereby driving the door body to rotate relative to the body of the electrical equipment; The linkage assembly includes an opening linkage group and a closing linkage group. The opening linkage group is hinged to the output component, and the closing linkage group is hinged to the opening linkage group. The drive component can selectively drive the opening linkage group and the closing linkage group to rotate. When the drive assembly drives the door opening linkage group to rotate, the door opening linkage group drives the output shaft to rotate in the first direction; When the drive assembly drives the door closing linkage group to rotate, the door closing linkage group drives the door opening linkage group to rotate in the opposite direction, thereby driving the output shaft to rotate in a second direction, which is opposite to the first direction.

2. The door opening and closing device according to claim 1, characterized in that, The output component further includes a drive wheel and an output wheel, both of which are rotatably mounted on the base. The drive wheel is hinged to the connecting rod assembly, and the hinge point between the drive wheel and the connecting rod assembly is eccentrically located to the rotation center of the drive wheel. The output wheel is poweredly connected to the drive wheel, the output shaft is fixedly connected to the output wheel, and the drive assembly is used to drive the linkage assembly to rotate so as to drive the drive wheel to rotate, thereby driving the output wheel and the output shaft to rotate.

3. The door opening and closing device according to claim 2, characterized in that, Both the drive wheel and the output wheel are gears, and they mesh with each other to achieve power connection; or Both the drive wheel and the output wheel are pulleys, and the output assembly also includes a transmission belt, which is wound around the drive wheel and the output wheel.

4. The door opening and closing device according to claim 1, characterized in that, The door opening linkage assembly includes a first linkage and a second linkage. The middle part of the first linkage is hinged to the base, one end of the first linkage is hinged to the second linkage, and the other end can drive the first linkage to rotate under the drive of the drive assembly. One end of the second linkage is hinged to one end of the first linkage, and the other end is hinged to the output assembly. The drive assembly can drive the first linkage to rotate and drive the output assembly to rotate through the second linkage, thereby driving the output shaft to rotate along the first direction. The closing linkage assembly is hinged to the first link, and the hinge point between the closing linkage assembly and the first link is located between the hinge point between the first link and the base and the hinge point between the first link and the second link; the driving component can also drive the closing linkage assembly to rotate so as to drive the first link to rotate in the opposite direction, thereby driving the output component to rotate in the opposite direction through the second link so as to drive the output shaft to rotate in the second direction.

5. The door opening and closing device according to claim 4, characterized in that, The closing linkage assembly includes a third link and a fourth link. One end of the third link is hinged to the first link, and the other end is hinged to the fourth link. The middle part of the fourth link is hinged to the base. One end of the fourth link is hinged to the third link, and the other end can drive the fourth link to rotate under the drive of the drive assembly. This drives the first link to rotate through the third link, which in turn drives the output assembly to rotate in the opposite direction through the second link, thereby driving the output shaft to rotate in the second direction.

6. The door opening and closing device according to claim 5, characterized in that, The end of the fourth link away from the third link forms a cam portion, which is used to contact the drive assembly, and the drive assembly can drive the fourth link to rotate through the cam portion.

7. The door opening and closing device according to claim 1, characterized in that, The drive assembly includes a drive unit and a drive slider. The drive unit is rotatably connected to the base, and the drive slider is slidably connected to the base and in contact with the door opening linkage assembly. The drive unit can selectively abut against the drive slider or the door closing linkage assembly. When the driving part abuts against the driving slider, the driving part can drive the driving slider to slide relative to the base in a direction away from the driving part, thereby driving the door opening linkage to rotate so as to drive the output shaft of the output component to rotate in the first direction; When the drive unit abuts against the door closing linkage assembly, the drive unit can drive the door closing linkage assembly to rotate, thereby causing the door opening linkage assembly to rotate in the opposite direction, which in turn causes the output shaft to rotate in the second direction.

8. The door opening and closing device according to claim 7, characterized in that, The door opening and closing device further includes an elastic mechanism mounted on the base and abutting the drive slider. The elastic mechanism is used to apply an elastic force to the drive slider to maintain the tendency of the drive slider to move toward the drive assembly. The drive part can abut and drive the drive slider to slide away from the drive assembly against the elastic force.

9. The door opening and closing device according to claim 1, characterized in that, The drive assembly includes a drive motor and a drive cam. The drive motor is fixedly mounted on the base, and the drive cam is fixedly mounted on the motor shaft of the drive motor. The drive motor is used to drive the drive cam to rotate and drive the linkage assembly to rotate relative to the base through the drive cam, thereby driving the output shaft to rotate, and thus driving the door to rotate relative to the machine body.

10. The door opening and closing device according to claim 9, characterized in that, When the door is closed, the drive cam can extend at least partially out of the base body during rotation to abut against the door, thereby driving the door to rotate relative to the body.

11. An electrical appliance, characterized in that, include: Organism; A door body, which is rotatably mounted on the machine body; and The door opening and closing device according to any one of claims 1-10, wherein the output shaft is fixedly connected to the door body.

Images