A door opening and closing device and an electric appliance

Abstract

The application belongs to the technical field of electrical appliances, and particularly relates to a door opening and closing device and an electrical appliance. The door opening and closing device comprises a top door mechanism and a rotating door mechanism driven by the same driving mechanism. The rotating door mechanism comprises a driving part and a rotating door part. One end of the rotating door part is rotatably arranged at a hinge point C of a door body, and the other end is rotatably connected to a hinge point A of the driving part. The other end of the driving part is rotatably arranged at a hinge point D of a base. The driving mechanism can drive the driving part to rotate, so as to drive the rotating door part to push the door body. The hinge point A and the rotating center B of the door body are respectively located on two sides of a line connecting the hinge point C and the hinge point D. The door opening and closing device and the electrical appliance provided by the application can improve the convenience and safety of opening and closing the door.

Description

Technical Field

[0001] This application belongs to the field of electrical technology, specifically relating to a door opening and closing device and electrical equipment. Background Technology

[0002] With the improvement of living standards, appliances such as refrigerators, dishwashers, and disinfection cabinets have become widely used in people's lives. To maintain the sealing performance of these appliances, a suction structure or a negative pressure system is usually installed between the cabinet and the door to stably fix the door to the cabinet. While this improves the performance of the appliances, it also increases the difficulty of opening the door, usually requiring considerable force to pull it open, which is inconvenient to use. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a door opening and closing device and an electrical appliance, aiming to improve the convenience and safety of opening the door to a certain extent.

[0004] The technical solution of this invention is as follows:

[0005] On the one hand, this application provides a door opening and closing device, including: a top door mechanism and a revolving door mechanism driven by the same drive mechanism;

[0006] The revolving door mechanism includes a driving component and a revolving door component. One end of the revolving door component is rotatably mounted on the hinge point C of the door body, and the other end is rotatably connected to one end of the driving component at hinge point A. The other end of the driving component is rotatably mounted on the hinge point D of the base. The driving mechanism can drive the driving component to rotate, so as to drive the revolving door component to push the door body.

[0007] The hinge point A and the rotation center B of the door are located on opposite sides of the line connecting the hinge point C and the hinge point D, respectively.

[0008] In some embodiments, the four sides formed by the sequential connection of hinge point A, hinge point C, rotation center B, and hinge point D constitute a parallelogram.

[0009] In some embodiments, the drive mechanism includes a linkage gear, and the linkage gear further includes:

[0010] The main body is rotatably mounted on the base;

[0011] The first pushing part is provided on the main body. When the main body rotates in the forward direction, it pushes the driving member to rotate, thereby driving the door member to rotate the door body and open the door body.

[0012] The second pushing part is provided on the main body. When the main body rotates in the reverse direction, it pushes the driving member to rotate, thereby driving the door member to rotate the door body and close the door body.

[0013] In some embodiments, the revolving door mechanism rotates a first angle between the first pushing part and the second pushing part, and the body is coaxially rotatably mounted on the base with the revolving door mechanism.

[0014] In some embodiments, the door-top mechanism includes a first tooth, and the linkage gear further includes a third pushing part having a second tooth that meshes with the first gear. When the main body rotates in the forward direction, the third pushing part drives the door-top mechanism to push the door body.

[0015] In some embodiments, a rotation limiting groove is provided on the main body, the main body and the driving member are coaxially rotatably disposed on the base, and the driving member can rotate within the rotation limiting groove, and the first pushing part and the second pushing part are the groove walls of the rotation limiting groove in the radial direction of the linkage gear.

[0016] In some embodiments, the top door mechanism includes:

[0017] A linkage component, wherein the first end of the linkage component is rotatably mounted on the base, and the second end of the linkage component is connected to the drive mechanism;

[0018] A top door component, the first end of which is rotatably connected to the linkage component, and the second end of which is used to push the top door body;

[0019] The drive mechanism drives the linkage to rotate, which in turn drives the top door component to push the door body.

[0020] In some embodiments, the top door mechanism further includes:

[0021] The elastic limiting component is connected to both the linkage component and the base, and maintains the linkage component at a preset angle.

[0022] In some embodiments, one of the top door member and the linkage member has a waist-shaped hole, and the other has a pin, which is rotatably disposed in the waist-shaped hole.

[0023] In some embodiments, the top door mechanism is rotatably mounted on the base. The top door mechanism includes a first tooth that meshes with the drive mechanism and a top door portion for pushing the door body. The drive mechanism drives the top door mechanism to rotate relative to the base through the first tooth, thereby causing the top door portion to push the door body.

[0024] In some embodiments, the top door mechanism further includes:

[0025] A limiting member is disposed on the base, and the top door mechanism abuts against the limiting member when it rotates relative to the base to a preset angle; and

[0026] The tensioning member is connected at both ends to the top door mechanism and the base respectively, and maintains the top door mechanism at the preset angle.

[0027] In some embodiments, the top door mechanism is cam-shaped, with the first tooth and the top door portion located on the rim of the cam.

[0028] In some embodiments, the driving structure includes:

[0029] drive;

[0030] First transmission component;

[0031] The second transmission component is connected to the driver and is detachably connected to the first transmission component.

[0032] The clutch pusher assembly pushes the second transmission assembly to separate from or connect with the first transmission assembly.

[0033] The linkage gear is connected to the first transmission component and drives the drive component to rotate and the top door mechanism to push the door body.

[0034] In some embodiments, the clutch push assembly includes a push sleeve sleeved on the second transmission assembly and a push rod for pushing the push sleeve, thereby pushing the push sleeve with the push rod to separate the first transmission assembly from the second transmission assembly.

[0035] In some embodiments, the second transmission component includes:

[0036] The first transmission component includes a connecting end that can be detachably connected to the first transmission assembly and a pushing end that is embedded in the pushing sleeve. An axial through groove is formed on the inner surface of the first transmission component.

[0037] The second transmission component has a locking block on its outer surface. When the first transmission component is sleeved on the second transmission component, the locking block is axially slidably embedded in the axial through groove.

[0038] A drive shaft is connected to the driver, and the second transmission component and the first transmission assembly are both sleeved on the drive shaft.

[0039] In some embodiments, the push sleeve pushes the second transmission assembly along a first direction, the push sleeve is provided with a first push surface, and the push rod is provided with a second push surface that contacts the first push surface, wherein the angle between the first direction and the first push surface is an acute angle.

[0040] In some embodiments, the push sleeve pushes the second transmission assembly along a first direction;

[0041] The push sleeve has two first push grooves, which are located on opposite sides of the push sleeve. The groove walls of the two first push grooves are respectively provided with first push surfaces.

[0042] The push rod includes two push arms arranged side by side and a connecting part connecting the two push arms. The ends of the two push arms away from the connecting part are provided with second pushing surfaces, and the two second pushing surfaces are respectively in contact with the two first pushing surfaces.

[0043] On the other hand, this application provides an electrical device, including a housing, a door rotatably disposed on the housing, and the door opening and closing device, wherein the base is disposed on the housing.

[0044] In some embodiments, the electrical appliance is one of a refrigerator, a disinfection cabinet, and a dishwasher.

[0045] The beneficial effects of the present invention include at least the following:

[0046] This invention provides a door opening and closing device and electrical equipment. Through a drive mechanism, a door-pushing mechanism and a door-turning mechanism respectively achieve automatic door-pushing and door-turning operations, improving the convenience and safety of door opening. The door-pushing mechanism pushes the door body, accumulating force to overcome opening resistance and open the door to a set angle, thereby significantly reducing the resistance of the subsequent door-turning mechanism and increasing the automatic door-opening speed. Specifically, the door-turning component is rotatably connected to the drive component and the door body. This allows the door-turning component to adapt to changes in the deflection posture of the linkage component by deflecting relative to the drive component and the door body, maintaining a stable hinge to the door body and improving the pushing and pulling effect during the door-turning process. Furthermore, the hinge points C between the revolving door component and the door body, A between the revolving door component and the driving component, D between the driving component and the base, and B between the door body and the housing are arranged in a reasonable manner, so that hinge point A and the rotation center B are located on both sides of the line connecting hinge point C and hinge point D, forming a convex quadrilateral. This avoids the driving component and the revolving door component from forming a deflection of more than 180 degrees during rotation, which would result in the revolving door component being unloaded, thus avoiding the problems of being unable to rotate the door body and limiting the opening range of the door body. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the opening and closing device provided in an embodiment of the present invention;

[0049] Figure 2 for Figure 1 A schematic diagram of the revolving door mechanism in the door opening and closing device;

[0050] Figure 3 for Figure 1 A schematic diagram showing the arrangement of the revolving door mechanism in the door opening and closing device;

[0051] Figure 4 for Figure 1 A schematic diagram of the top door mechanism of the door opening and closing device in the diagram;

[0052] Figure 5 for Figure 1 Another structural schematic diagram of the top door mechanism of the door opening and closing device in the picture;

[0053] Figure 6 for Figure 1 A schematic diagram of the drive components and linkage gears of the door opening and closing device;

[0054] Figure 7 for Figure 1 A schematic diagram of the linkage components and linkage gears of the door opening and closing device;

[0055] Figure 8 for Figure 1 A top view of the linkage gear of the door opening and closing mechanism;

[0056] Figure 9 for Figure 1 Front view of the linkage gear of the door opening and closing device;

[0057] Figure 10 for Figure 1 A bottom view of the linkage gear of the door opening and closing device;

[0058] Figure 11 for Figure 1 A schematic diagram of the base of the door opening and closing device;

[0059] Figure 12 for Figure 1 Exploded view of the clutch mechanism of the door opening and closing device in the image;

[0060] Figure 13 for Figure 1 Top view of the assembly state of the clutch mechanism in the door opening and closing device;

[0061] Figure 14 for Figure 1 A front view of the assembly state of the clutch mechanism in the door opening and closing device;

[0062] Figure 15 for Figure 13 AA section view;

[0063] Figure 16 for Figure 1 A top view of the first transmission component of the door opening and closing device;

[0064] Figure 17 for Figure 1 Front view of the first transmission component of the door opening and closing device;

[0065] Figure 18 for Figure 17 AA section view;

[0066] Figure 19 for Figure 1 A bottom view of the first transmission component of the door opening and closing device;

[0067] Figure 20 for Figure 1 Assembly diagram of the door opening and closing device;

[0068] Figure 21 for Figure 1 Top view of the assembly state of the door opening and closing device;

[0069] Figure 22 for Figure 1 A bottom view of the assembly state of the door opening and closing device in the middle;

[0070] Figure 23 for Figure 1 A schematic diagram illustrating the principle of the door closing and return process of the door opening and closing device;

[0071] Figure 24 for Figure 1 Front view of the door opening and closing device in the middle;

[0072] Figure 25 for Figure 24 AA section view;

[0073] Figure 26 for Figure 1 A schematic diagram of the refrigerator assembly layout for the door opening and closing mechanism;

[0074] Figure 27 This is a schematic diagram of the refrigerator provided in an embodiment of the present invention;

[0075] Figure 28 for Figure 1 A schematic diagram of the top door status of the door opening and closing device in the middle;

[0076] Figure 29 for Figure 1 A schematic diagram of the door opening and revolving door state of the door opening and closing device in the diagram;

[0077] Figure 30 for Figure 1 A schematic diagram of the closed and rotating door state of the door opening and closing device.

[0078] In the attached image:

[0079] 100-Drive mechanism, 110-Driver, 120-Linkage gear, 121-Third tooth, 122-Third pushing part, 1221-Second tooth, 123-Rotation limiting groove, 1231-First pushing part, 1232-Second pushing part, 124-Reset spring receiving groove, 125-Second fixed seat;

[0080] 200-210-driving component, 211-coaxial rotating shaft, 212-first fixed seat, 220-revolving door component, 230-hinge seat, 240-return spring;

[0081] 300-Top door mechanism, 310-Linkage component, 311-Linkage component pivot hole, 312-Thickening groove, 313-First tooth, 314-Third fixed seat, 320-Top door component, 322-Waist-shaped hole, 330-Push seat, 340-Shock damping pad, 350-Linkage component pivot shaft, 360-Pin shaft, 370-Elastic limiting component, 380-Top door type component, 381-Fourth tooth, 382-Top door part, 383-Reinforcing rib;

[0082] 400--Clutch device; 410--First transmission assembly; 411--Slot; 412--Central shaft hole; 413--Internal gear; 414--Extension cylinder; 420--Second transmission assembly; 421--First transmission component; 4211--Connecting end; 4212--Pushing end; 4213--Support flange; 4214--Inner surface of the first transmission component; 4215--External gear; 4216--Limiting boss; 4217--Axial through groove; 422--Second transmission component; 4221--Outer surface of the second transmission component 4222-Clamping block, 4223-Drive shaft hole, 4224-First limiting surface, 423-Drive shaft, 4231-Second limiting surface, 430-Clutch push assembly, 431-Push sleeve, 4311-First push surface, 4312-First push groove, 4313-Sunk, 432-Push rod, 4321-Second push surface, 4322-Limiting baffle, 4323-Push arm, 4324-Connecting part, 433-Linear driver;

[0083] 600-Base, 610-Drive motor mounting slot, 620-Second stop, 621-Stop profile, 630-First stop, 631-Elastic element receiving slot, 632-Guide slot, 633-First stop surface of linkage element, 634-Second stop surface of linkage element, 635-Fourth fixed seat, 641-Third stop, 642-Fourth stop, 650-Coaxial rotating shaft seat;

[0084] 910 - Box body, 920 - Door body. Detailed Implementation

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0086] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0087] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, 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. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0088] This application is described below with reference to the accompanying drawings and specific embodiments:

[0089] This embodiment provides a door opening and closing device, which aims to improve the efficiency and convenience of door opening and closing operations to a certain extent, and at the same time solve the problems of high resistance in the initial stage of manually opening the refrigerator door, excessive rotation in the subsequent stage, and unsmooth door opening and closing process.

[0090] The door opening and closing device described in this embodiment is used to be mounted on electrical equipment equipped with a door that can be deflected for opening and closing. The opening and closing of the door is driven by the action of the door opening and closing device. This device can be an electrical appliance such as a refrigerator, disinfection cabinet, or dishwasher.

[0091] See Figure 1Specifically, the electrical device includes a housing 910 and a door 920 rotatably mounted on the housing 910. The housing 910 is provided with a retrieval opening. The door 920 is operated to rotate on the housing 910 to close or open the retrieval opening of the housing 910.

[0092] See Figure 1 In some embodiments, the door opening and closing device may include a drive mechanism 100, a revolving door mechanism 200, and a door-mounting mechanism 300. The drive mechanism 100 outputs driving force to drive the revolving door mechanism 200 and the door-mounting mechanism 300 to perform the full rotation operation of the door body 920 and the initial door-mounting operation; that is, in the embodiments of this application, both the revolving door mechanism 200 and the door-mounting mechanism 300 are driven by the drive mechanism 100, and both are driven by the drive mechanism 100.

[0093] See Figure 1 In some embodiments, to meet assembly accuracy requirements or achieve efficient assembly, a separate base 600 can be provided on the housing 910 to support the aforementioned drive mechanism 100, rotary door mechanism 200, and top door mechanism 300. This allows the drive mechanism 100, rotary door mechanism 200, and top door mechanism 300 to be assembled onto the base 600, and then the base 600 can be assembled onto the housing 910 as a whole. This enables standardized installation on electrical equipment based on the base 600, ensuring both stability and precision and reliability. Furthermore, when the base 600 is assembled onto electrical equipment such as a refrigerator, the overall installation is efficient and reliable.

[0094] In this embodiment, the base 600 is a separate component disposed within the housing 910; in other embodiments, the base 600 may also be part of the housing 910, formed on the housing 910, rather than a separate component.

[0095] In some embodiments, the drive mechanism 100 outputs a driving force to drive the revolving door mechanism 200 and the top door mechanism 300 to rotate relative to the base 600, thereby rotating and pushing the door body 920. For example, when the door opens automatically, the top door mechanism 300 is first driven to push the door body 920 until it overcomes the door's suction force, negative pressure, and other opening resistances, opening the door body 920 at a certain angle. Then, the revolving door mechanism 200 continues to rotate the door body 920, thereby achieving a coordinated, smooth, and efficient automatic door opening operation. When the door closes, the drive mechanism 100 first drives the revolving door mechanism 200 to pull the door body 920 towards the housing 910 until it closes. During this process, the drive mechanism 100 simultaneously drives the top door mechanism 300 to reset.

[0096] It is worth noting that, with the output power remaining constant, the output force is inversely proportional to the speed. Therefore, while keeping the drive power constant, a large pushing force can be obtained at a relatively low door deflection speed during the top door stage, so that the top door mechanism 300 can quickly and reliably push open the door body 920. When the rotating door mechanism 200 is engaged, due to the very small rotation resistance, a high rotating door speed can be obtained while maintaining a small rotating door force, thereby quickly completing the rotating door operation and achieving the door opening position.

[0097] In some embodiments, the revolving door mechanism 200 or the top door mechanism 300 may be respectively configured in conjunction with the drive mechanism 100 to implement the door opening and closing structure scheme or the top door structure scheme separately.

[0098] See Figure 1 and Figure 2 In some embodiments, the revolving door mechanism 200 includes a rotatably connected drive member 210 and a revolving door member 220. The drive member 210 is connected to the drive mechanism 100 and moves under the drive of the drive mechanism 100 to obtain driving force. The revolving door member 220 is connected between the door body 920 and the drive member 210. Under the drive of the drive member 210, the door body 920 is pushed and pulled, causing it to deflect relative to the housing 910, thereby realizing the opening and closing operation of the door.

[0099] See Figure 3 In some embodiments, in order to ensure the turning efficiency and structural stability of the revolving door mechanism 200, and to reduce the impact of the relative deflection state and extension length of the drive component 210 and the revolving door component 220 on the door opening and turning speed, the revolving door mechanism 200 and its hinge point C with the door body 920 can be planned and arranged in conjunction with the rotation center point B of the electrical equipment door body 920 and the arrangement position of the base 600. Specifically, the hinge point C between one end of the revolving door component 220 and the door body 920, the hinge point A between the drive component 210 and one end of the revolving door component 220, and the hinge point D of the other end of the drive component 210 on the base 600 are designed to be rotatably arranged. That is, the hinge point A and the rotation center B are located on both sides of the line connecting the hinge point C and the hinge point D, forming a convex quadrilateral. This avoids the extreme state of the revolving door component 220 being unloaded and the door body 920 being unable to rotate due to the deflection of the drive component 210 and the revolving door component 220 exceeding 180 degrees during rotation, and also avoids limiting the opening range of the door body 920.

[0100] In some embodiments, to maximize the opening angle of the door 920 and cabinet 910 structures without being overly limited by the revolving door mechanism 200, the position of one end of the revolving door component 220 at hinge point C of the door 920, the position of the other end of the driving component 210 at hinge point D of the base 600, and the lengths of the two hinge points of the driving component 210 and the revolving door component 220 can be set according to the principle that the four sides formed by connecting hinge point A, hinge point C, rotation center B, and hinge point D in sequence constitute a parallelogram. In this state, excluding the structural width, thickness, and structural components such as hinges, the opening angle of the door 920 can approach 180 degrees. Of course, the larger the refrigerator door 920 is, the better; it is determined based on multiple factors such as installation conditions, usage requirements, and convenience. In other embodiments, the above arrangement can reliably achieve a door opening angle of 130 degrees.

[0101] See Figure 1 In some embodiments, the drive mechanism 100 includes a linkage gear 120 rotatably mounted on the base 600, which can serve as an output part of the drive mechanism 100. In other embodiments, the drive mechanism 100 further includes a driver 110 mounted on the base 600, which is connected to the linkage gear 120 via a connector or transmission member to output driving force.

[0102] In some embodiments, the driver 110 may be configured as a geared motor or a motor equipped with a reduction gearbox, thereby enabling reasonable control of output torque and speed.

[0103] The detailed structure of the revolving door mechanism 200 is described below:

[0104] See Figure 2 In some embodiments, a hinge seat 230 may be provided on the door body 920, which is hinged to the first end 221 of the revolving door component 220. In order to ensure the reliability of the hinge and the uniformity of the force, the hinge seat 230 may be configured as a U-shaped double-arm hinge seat, in which the first end 221 of the revolving door component is embedded and fixed by the hinge shaft.

[0105] In some embodiments, the drive member 210 and the revolving door member 220 may be configured as plates, thereby greatly reducing the installation height when stacked.

[0106] See Figure 6In some embodiments, the pivot portions of the drive member 210 and the revolving door member 220 can be configured with reduced thickness, thereby reducing the overall thickness in the pivoted stacked state and lowering the assembly height. A pivot shaft 214 can also be rotatably mounted on the lower plate-like member of the drive member 210 and the revolving door member 220 to support the upper plate-like member, forming a stable and reliable pivot structure and pivot state. In other embodiments, one end of the drive member 210 and the revolving door member 220 can be configured as a U-shaped pivot seat, with the other end embedded within it and fixed by the pivot shaft 214.

[0107] In some embodiments, the drive member 210 and the revolving door member 220 may be configured as rods to achieve a revolving door structure that is both small in size and high in strength.

[0108] In some embodiments, the linkage gear 120 serves as a component that directly drives the drive member 210 and the door-mounting mechanism 300, and its driving mode should simultaneously satisfy the operating modes of both the deflectable drive member 210 and the door-mounting mechanism 100. The detailed structure of the linkage gear 120 is described below.

[0109] See Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 In some embodiments, the main body of the linkage gear 120 can be configured as a rotating component on the base 600, and is provided with a third tooth 121 that meshes with the upstream driver 110. It drives the top door mechanism 300 and the drive component 210 by outputting torque through rotation. To meet the driving requirements of the drive component 210, a first pushing part 1231 and a second pushing part 1232 can be provided opposite to each other on the main body, and there is enough space between them to accommodate the drive component 210. In the actual assembled state, the drive component 210 can be pushed to rotate from both sides of the drive component 210 by the first pushing part 1231 and the second pushing part 1232 respectively. Thus, when the main body of the linkage gear 120 rotates in the forward and reverse directions, the drive component 210 is pushed to rotate in two opposite directions, thereby driving the revolving door component 220 to push or pull the door body 920 to realize the opening and closing operations.

[0110] In some embodiments, the second push part 1232 can be configured as an opening push part, and the first push part 1231 can be configured as a closing push part; that is, when the linkage gear 120 rotates in the forward direction, the second push part 1232 pushes the driving member 210 toward the door body 920 to push the revolving door member 220 to push the door body 920 to open the door; when the linkage gear 120 rotates in the reverse direction, the first push part 1231 pushes the driving member 210 away from the door body 920 to push the revolving door member 220 to pull the door body 920 to close the door.

[0111] In some embodiments, during the door opening process, in order to meet the timing control of performing the door-pushing operation first and then the door-turning operation, the distance between the first pushing part 1231 and the second pushing part 1232 can be matched and designed to leave a certain deflection space. This allows the drive member 210 to rotate from the first pushing part 1231 to the second pushing part 1232 when it deflects relative to the body. Thus, by setting the initial position of the drive member 210, there is a time difference between the deflection of the linkage gear 120 and the deflection of the drive member 210. Therefore, during the door opening process, when the linkage gear 120 rotates and drives the door-pushing mechanism 300 to perform the pushing operation, the door-turning mechanism 200 does not perform the active door-turning operation at the same time. Instead, it delays for a period of time before the door-turning mechanism 200 performs the active door-turning operation under the drive of the linkage gear 120.

[0112] In some embodiments, the initial position of the drive member 210 can be set to abut against the first push part 1231, so that during the door opening process, after the linkage gear 120 starts to rotate, the drive member 210 gradually approaches the second push part 1232 from the first push part 1231, thereby accurately controlling the time when the second push part 1232 pushes the drive member 210, so that the revolving door mechanism 200 and the top door mechanism 300 are seamlessly connected, the door opens smoothly, and defects such as jamming and vibration are avoided.

[0113] The deflection angle of the drive component 210 can be matched and set according to the design opening of the door body 920 to meet the requirements of the revolving door, and is controlled at the first angle. The value of the first angle is also related to the initial position and length of the drive component 210, and can be adjusted and set according to the actual assembly conditions.

[0114] See Figure 1 , Figure 2 and Figure 11 In some embodiments, to improve the position control accuracy of the driving member 210 and prevent it from becoming misaligned, a second stop member 620 can be provided on the base 600 to prevent excessive deflection. The second stop member 620 can be positioned between the second pushing part 1232 and the first pushing part 1231, and the initial position of the driving member 210 can be set against the first pushing part 1231 to restrict the driving member 210 between the second stop member 620 and the first pushing part 1231, ensuring the reliability of its initial position. Based on the width of the driving member 210 and its preset initial position, and referring to the initial position of the first pushing part 1231, the position of the second stop member 620 can be set with the distance between the second stop member 620 and the first pushing part 1231 being slightly greater than the width of the driving member 210.

[0115] In some embodiments, a stop surface 621 matching the side wall profile of the driving member 210 may be provided on the second stop member 620 to ensure the uniformity of the force on the driving member 210 in the stop state, and to avoid local force concentration and structural damage.

[0116] In some embodiments, to improve the rotation control accuracy and reliability of the drive component 210, the first end of the body and the drive component 210 can be coaxially and rotatably mounted on the base 600, thereby enabling angle control of the drive component 210 by controlling the rotation angle of the body, greatly improving convenience. In other embodiments, the first end of the drive component 210 may not be coaxially mounted with the body, but may be pivotally connected to the body of the linkage gear 120 to form a structure similar to a crankshaft drive; the drive component 210 may also be rotatably mounted on the base, with two push arms extending out and a first jacking part 1231 and a second jacking part 1232 respectively provided on the two push arms, and the drive component 210 arranged between the beam push arms to realize the jacking operation. The specific arrangement position and structural specifications can be determined by experiments.

[0117] In some embodiments, a third pushing part 122 is provided on the body of the linkage gear 120 to drive the door-mounting mechanism 300. During the door-opening operation, the body of the linkage gear 120 rotates forward, driving the door-mounting mechanism 300 to push the door body 920. Conversely, during the door-closing operation, the body of the linkage gear 120 rotates in the reverse direction, causing the door-mounting mechanism 300 to reset.

[0118] In some embodiments, the door-opening operation only needs to overcome the opening resistance, which is mainly the suction force between the door body 920 and the housing 910, to open the door body 920 by a small angle. Therefore, the pushing stroke of the door-opening mechanism 100 is also small. Correspondingly, the connection of the linkage gear 120 and the stroke and time of pushing the door-opening mechanism 100 can also be set to a relatively short door-opening process. That is, after the door mechanism 200 actively turns the door, the door-opening mechanism 100 can disconnect from the linkage gear 120 or simply continue to maintain the connection for a short period of time before separating, simplifying the structural linkage state in the working state and avoiding mutual interference.

[0119] See Figure 7To improve the timing control accuracy and reliability of connection and disconnection, the top door mechanism 100 can be equipped with a first tooth 313, and the third pushing part 122 is equipped with a second tooth 1221 that meshes with the first tooth 313. This allows for stable driving through meshing transmission, and the pushing stroke can be adjusted by controlling the length and number of teeth of the meshing teeth. During the opening process, the linkage gear 120 rotates in the forward direction, driving the top door mechanism 100 to push the door body 920 through meshing transmission until disengagement, at which point the top door mechanism 100 will no longer be under force. During the closing process, the linkage gear 120 rotates in the reverse direction. When the set angle is reached, the meshing connection between the first tooth 313 and the second tooth 1221 is re-established. Then, the top door mechanism 100 moves in the reverse pushing direction under the drive of the linkage gear 120 until it returns to its original position.

[0120] In some embodiments, the top door stroke control of the top door mechanism 100 can be achieved based on the deflection control of the drive member 210. Specifically, the angle of rotation of the linkage gear 120 during the time period from the start of engagement to the disengagement of the first tooth 313 and the second tooth 1221 can be set as the second angle. Considering that the first angle is the angle of rotation of the body of the linkage gear 120 relative to the drive member 210 when the body starts to rotate, that is, the time period of delay in the door mechanism 200 implementing the door opening relative to the start of the forward rotation of the body, the first angle can be controlled to be less than or equal to the second angle, that is, the engagement time period is controlled based on this, thereby controlling the length of the meshing teeth.

[0121] In some embodiments, to ensure smooth connection between the top door and the revolving door process, the difference between the first angle and the second angle can be controlled within 1 degree. That is, when the driving member 210 abuts against the second pushing part 1232, the first tooth 313 and the second tooth 1221 still maintain a short-term meshing state, or maintain the last meshing tooth pair.

[0122] See Figure 6 and Figure 8 In some embodiments, to smoothly control the deflection posture of the drive component 210, a rotation limiting groove 123 can be formed on the body of the linkage gear 120, and the body of the linkage gear 120 and the drive component 210 are coaxially and rotatably mounted on the base 600. The coaxial rotating shaft 211 can be placed within the rotation limiting groove 123, and the drive component 210 is rotatably mounted within the rotation limiting groove 123. The first pushing part 1231 and the second pushing part 1232 are configured as the groove wall of the rotation limiting groove 123 in the radial direction of the linkage gear 120, i.e., configured as a fan-shaped groove. By accommodating the drive component 210 through the rotation limiting groove 123, the overall assembly height is reduced. Simultaneously, the groove structure effectively protects the impact and vibration resistance of the pushing area of ​​the drive component 210, ensuring the reliability of the structure.

[0123] In some embodiments, to ensure that the driving member 210 is initially positioned against the first pushing part 1231 and to resist vibration affecting its position and posture, a return spring 240 can be provided, with its two ends connected to the body of the linkage gear 120 and the driving member 210 respectively. This maintains tension between the driving member 210 and the first pushing part 1231, creating a tendency for them to move closer together. Simultaneously, after the door 920 is opened, it guides the driving member 210 to abut against the second pushing part 1231. In other embodiments, the return spring 240 can be replaced with a leaf spring or other elastic material, achieving limiting through elastic pushing, tensioning, or other methods.

[0124] In some embodiments, for ease of fixing, a first fixing seat 212 may be provided on the drive member 210 to fix the first end of the return spring 240; a second fixing seat 125 may also be provided on the body of the linkage gear 120 to fix the second end of the return spring 240.

[0125] See Figure 8 Considering the deformation characteristics of the return spring 240, a return spring receiving groove 124 is formed on the body of the linkage gear 120, and the return spring 240 is placed inside it. This not only allows the return spring 240 to be assembled on the linkage gear 120, but also prevents external impacts and scratches on the return spring 240, ensuring the stability of its deformation state. In this embodiment, the return spring receiving groove 124 can also be set as a fan-shaped groove, with a relatively larger width on the side near the rotation limit groove 123, thereby adapting to the deflection process of the drive component 210 and preventing the return spring 240 from bending and deforming due to contact.

[0126] In some embodiments, to improve the stability and reliability of the linkage gear 120, a third stop 641 and a fourth stop 642 can be provided on the base 600, respectively arranged at both ends of the rotation trajectory of the linkage gear 120, to prevent it from over-rotating and ensure the positioning accuracy of forward and reverse rotation. When the door 920 is closed, the third stop 641 stops the linkage gear 120 from rotating; when the door 642 is opened to its limit position, the fourth stop 642 stops the linkage gear 120 from rotating.

[0127] In some embodiments, the rotation limit angle of the linkage gear 120 can be determined according to the design opening of the door 920. The rotation angle of the linkage gear 120 between the third stop 641 and the fourth stop 642 can be set to 90 degrees to 130 degrees; it can be specifically set to 120 degrees or other specific degrees.

[0128] See Figure 6In some embodiments, to ensure the balanced posture of the driving member 210, an extended limiting portion 213 can be provided at the end of the driving member 210. The extended limiting portion 213 abuts against the base 600 to prevent one side from tilting up. In other embodiments, a self-lubricating material layer can also be provided on the extended limiting portion 213 to reduce the coefficient of contact friction.

[0129] See Figure 1 In some embodiments, the drive mechanism 100 further includes a clutch device 400; the clutch device 400 is used to establish or disconnect the connection between the driver 110 and the linkage gear 120, thereby preventing the door opening mechanism 300 and the rotating mechanism 200 from interfering with the drive mechanism 100 when the door is manually opened and closed, and can disconnect the drive mechanism 100 in case of device failure or environmental interference, so as to ensure the safety of the device structure and avoid mechanical damage.

[0130] See Figure 12 , Figure 13 , Figure 14 and Figure 15 The clutch device 400 provided in this application embodiment is specifically provided with a first transmission component 410 and a second transmission component 420 that can be connected and separated, which are used to connect the upstream structure and the downstream structure respectively, so as to realize the stable and reliable connection and separation of the upstream structure and the downstream structure; in this embodiment, the connection and disconnection between the upstream drive mechanism 100 and the downstream revolving door mechanism 200 and the top door mechanism 300 in the door opening and closing device are realized.

[0131] To facilitate the switching between the connected and disconnected states of the first transmission assembly 410 and the second transmission assembly 420, the clutch device 400 is further provided with a clutch push assembly 430, which pushes the first transmission assembly 410 and the second transmission assembly 420 closer together until they connect or further apart until they disconnect. Matching connection structures can be provided on the first transmission assembly 410 and the second transmission assembly 420 respectively to achieve stable connection and convenient disconnection of the first transmission assembly 410 and the second transmission assembly 420.

[0132] In some embodiments, the clutch push assembly 430 is provided with a push sleeve 431 that can be fitted onto the second transmission assembly 420. During assembly, the second transmission assembly 420 is embedded in the push sleeve 431, which is used to stably fix the second transmission assembly 420. At the same time, the second transmission assembly 420 can be indirectly pushed to move by pushing the push sleeve 431, thereby avoiding direct contact with the second transmission assembly 420 and thus avoiding affecting the operating state of the second transmission assembly 420. The structural stability of the second transmission assembly 420 can also be ensured by pushing the second transmission assembly 420 as a whole.

[0133] The clutch push assembly 430 is also provided with a push rod 432 for cooperating to push the push sleeve 431. By moving the push sleeve 431 along the first direction with the push rod 432, the second transmission assembly 420 is pushed closer to the first transmission assembly 410 to establish a connection; or by operating the push rod 432, the push sleeve 431 is moved in the opposite direction along the first direction, so that the second transmission assembly 420 is moved away from the first transmission assembly 410 to disconnect the connection.

[0134] See Figure 12 and Figure 15 In some embodiments, the second transmission assembly 420 is provided with a first transmission member 421, which can be connected to the first transmission assembly 410. A connecting end 4211 can be provided on the first transmission member 421 for connecting to the first transmission assembly 410; a pushing end 4212 can also be provided on the first transmission member 421 for fitting into the pushing sleeve 431, thereby forming a stable fixed structure. Correspondingly, the connecting end 4211 can protrude from the pushing sleeve 431, ensuring smooth connection of the connecting end 4211 to the first transmission assembly 410.

[0135] See Figure 16 , Figure 17 , Figure 18 and Figure 19 In some embodiments, in order to improve the smoothness and convenience of connecting and separating the first transmission component 410 and the connecting end 4211, a slot 411 that can accommodate the connecting end 4211 can be provided on the first transmission component 410. The slot 411 can be configured to engage with the connecting end 4211, thereby establishing a stable connection and transmission engagement state through a convenient unidirectional pushing operation and a fastening process, ensuring the reliability of the transmission state. At the same time, when disconnecting, a quick and smooth separation can be achieved through a convenient unidirectional push, which can also reduce the impact on the state and structural stability of the first transmission component 421 and the first transmission component 410.

[0136] In some embodiments, based on the unidirectional engagement and disengagement operation of approaching and moving away, internal teeth 413 can be provided on the groove wall surface of the slot 411, and correspondingly, external teeth 4215 can be provided on the outer peripheral surface of the connecting end 4211. As the first transmission member 421 moves, the engagement and disengagement of the internal teeth 413 and the external teeth 4215 are realized.

[0137] In some embodiments, in order to adapt to the meshing requirements of the first transmission member 421 in the rotational state under certain working conditions, the gap between two adjacent internal teeth 413 in the slot 411 can be set to be greater than the width of the external teeth 4215, so as to have a sufficiently large adaptation space to facilitate the engagement of the external teeth 4215 and to efficiently establish the meshing connection state.

[0138] In some embodiments, the gap between two adjacent inner teeth 413 may be set to be more than twice the width of the outer teeth 4215.

[0139] In some embodiments, the gap between two adjacent external teeth 4215 on the outer peripheral surface of the connecting end 4211 can also be set to be greater than the width of the internal teeth 413, so as to have a sufficiently large adaptation space to facilitate the engagement of the internal teeth 413 and to efficiently establish a meshing connection.

[0140] In some embodiments, the gap between two adjacent external teeth 4215 can be set to be more than twice the width of the internal teeth 413.

[0141] In some embodiments, the first transmission component 410 can establish a transmission relationship with other structures through meshing transmission. The first transmission component 410 can be configured as a first transmission gear, and correspondingly, a slot 411 can be formed at the axial end of the first transmission gear. The first transmission member 421 moves along the axial direction of the first transmission gear to achieve connection and separation.

[0142] In some embodiments, to accommodate the rotating working state of the first transmission gear, the slot 411 can be configured as a circular slot, and the internal teeth 413 can be arranged at equal intervals on the wall surface of the circular slot, with a minimum of two; the number of teeth 413 can be set to six or eight, and the specific number can be set according to the specifications of the slot 411. Correspondingly, the outer surface of the connecting end 4211 can also be configured as circular, and the external teeth 4215 can be arranged at equal intervals on the wall surface of the circular slot, with a minimum of two; the number of teeth 413 can also be set to six or eight; the specific number can be the same as the number of internal teeth 413.

[0143] The central shaft hole 412 of the first transmission gear is coaxially arranged with the circular slot 411 to ensure the meshing efficiency and stability of the internal gear 413. An extension cylinder 414 can be coaxially arranged at the opening of the central shaft hole 412 to facilitate stable fixing of the embedded rotating shaft to the base 600.

[0144] In some embodiments, since the push end 4212 is embedded in the push sleeve 431, when the first transmission member 421 rotates, the large contact area can easily cause unstable rotation posture and excessive wear. Multiple spaced limiting bosses 4216 can be provided on the outer peripheral surface to separate the inner surface of the push sleeve 431 and the outer peripheral surface of the push end 4212, leaving a certain uniform gap, greatly reducing the contact area, reducing the degree of wear, and ensuring the stability of the rotation posture of the first transmission member 421.

[0145] In some embodiments, the limiting boss 4216 slidably abuts against the inner surface of the push sleeve 431, thereby further reducing wear. A self-lubricating material layer may be provided on the limiting boss 4216 to reduce the coefficient of friction, improve wear resistance, and extend service life.

[0146] In some embodiments, spaced protrusions may be further provided on the outer peripheral surface of the limiting boss 4216 to further reduce the contact surface.

[0147] In some embodiments, to achieve stable pushing of the first transmission member 421, a support flange 4213 may be provided on the first transmission member 421 for resting on the end face of the push sleeve 431. The support flange 4213 may be disposed between the connecting end 4211 and the push end 4212. Generally, the transmission member 421 may be integrally formed, but it is also possible that they may be separately molded and then assembled together.

[0148] In some embodiments, to ensure structural strength, the first transmission component 421, the push sleeve 431, etc., often require a certain thickness; after assembly, the overall height is often relatively high, and the required assembly space is correspondingly large. Therefore, a countersunk platform 4313 can be provided on the end face of the push sleeve 431 to accommodate the support flange 4213, reducing the overall height. To a certain extent, this also helps maintain the stability of the rotation axis of the first transmission component 421.

[0149] In some embodiments, in order to meet the transmission connection requirements between the first transmission member 421 and the upstream structure, a connection structure needs to be provided on the first transmission member 421. Therefore, the second transmission assembly 420 is also provided with a second transmission member 422 for driving the first transmission member 421 and connecting it to the upstream structure to realize the transmission of torque.

[0150] In some embodiments, considering that the first transmission member 421 needs to move along the first direction and also needs to satisfy torque transmission, the first transmission member 421 can be sleeved on the second transmission member 422 and can rotate with the second transmission member 422 to realize torque transmission; at the same time, it can move relative to the second transmission member 422 along the first direction.

[0151] In some embodiments, to enable the first transmission member 421 and the second transmission member 422 to slide relative to each other and rotate together, an axial through groove 4217 is provided on the inner surface 4214 of the first transmission member, and a locking block 4222 is provided on the outer surface 4221 of the second transmission member that can be embedded in the axial through groove 4217, thereby enabling the first transmission member 421 to rotate with the second transmission member 422. Simultaneously, the locking block 4222 can also slide along the axial through groove 4217, thereby allowing the first transmission member 421 to slide relative to the second transmission member 422 in a first direction.

[0152] To meet the torque transmission requirements, a transmission shaft 423 can be coaxially fixed inside the second transmission component 422 for connecting the upstream driver 110 and driving the second transmission component 422.

[0153] In some embodiments, in order to fix the drive shaft 423 into the second transmission member 422, a drive shaft hole 4223 can be opened on the second transmission member 422, and a first limiting surface 4224 can be provided in the drive shaft hole 4223. A second limiting surface 4231 can be provided on the outer peripheral surface of the drive shaft 423. When the drive shaft 423 is embedded in the drive shaft hole 4223, the second limiting surface 4231 abuts against the first limiting surface 4224, thereby restricting the rotation of the drive shaft 423 relative to the second transmission member 422.

[0154] In some embodiments, to meet process requirements and simplify the molding process, the drive shaft 423 may be configured as a cylindrical part, with a tangential plane on the outer circumference of the cylindrical part forming a second limiting surface 4231. Correspondingly, the drive shaft hole 4223 is configured in a matching shape.

[0155] In some embodiments, the first transmission component 410 and the second transmission component 422 are coaxially sleeved on the transmission shaft 423, thereby enabling the second transmission component 420 to move stably along the axial direction of the transmission shaft 423 toward or away from the first transmission component 410, ensuring the stability of the connection and separation of the first transmission component 410 and the second transmission component 420.

[0156] In some embodiments, the moving direction of the push sleeve 431 is along a first direction, and the pushing direction of the push rod 432 may be along the first direction.

[0157] In some embodiments, due to the small overall thickness space and the relatively small thickness direction, the direct pushing along the first direction requires a very small pushing structure, which undoubtedly greatly increases the difficulty of molding and assembly. Therefore, a reverse pushing structure can be provided; a first pushing surface 4311 that is not parallel to the first direction can be provided on the pushing sleeve 431, so that the pushing operation along the pushing direction can be achieved by pushing the first pushing surface 4311, and the pushing sleeve 431 is pushed towards the first transmission assembly 410 by the push rod 432 pushing the first pushing surface 4311.

[0158] In some embodiments, in order to optimize the efficiency of the jacking operation, the angle between the first jacking surface 4311 and the first direction can be set in the range of 30 degrees to 60 degrees, such as 30 degrees, 45 degrees or 60 degrees.

[0159] In some embodiments, the angle between the pushing direction of the push rod 432 and the first direction can be controlled at 90 degrees to minimize the arrangement space required for the push rod 432 and the second transmission component 420 to cooperate and reduce the overall size of the device.

[0160] In some embodiments, in order to improve the stability of the directional push, a second push surface 4321 that contacts the first push surface 4311 can be provided on the push rod 432. The uniformity of force on the first push surface 4311 is improved by the surface-to-surface contact push and misalignment, thereby ensuring the stability of the moving posture of the push sleeve 431.

[0161] In some embodiments, to balance the force on the push sleeve 431, the number of first push surfaces 4311 can be set to two, and the corresponding push rod 432 is also provided with two push arms 4323, which push the two first push surfaces 4311 respectively; thus, the uniformity of the force on the push sleeve 431 is ensured by applying force at two points. The two push arms 4323 can be connected to the same connecting part 4324 to achieve synchronous action and ensure that the magnitude of the applied force is consistent, thus ensuring that the force on the push sleeve 431 is uniform. Accordingly, each of the two push arms 4323 is provided with a second push surface 4321.

[0162] In some embodiments, two first pushing surfaces 4311 can be disposed on opposite sides of the pushing sleeve 431, two pushing arms 4323 can be disposed side by side, and the second pushing surface 4321 can be disposed on the end of the pushing arm 4323 away from the connecting part 4324, so that the pushing operation can be realized by pushing the connecting part 4324.

[0163] In some embodiments, the number of the first pushing surface 4311, the second pushing surface 4321, and the pushing arm 4323 may be set to two or more, depending on the specifications of the pushing sleeve 431.

[0164] In some embodiments, in order to limit the rotation of the push sleeve 431, a first push groove 4312 can be formed on the push sleeve 431. By embedding the push rod 432 into the push groove 4312, the push rod 432 and the push sleeve 432 are connected as one unit, limiting the relative rotation in the circumferential direction and ensuring the reliability of the push operation.

[0165] In some embodiments, two first push grooves 4312 can be provided, and two push arms 4323 can be arranged side by side as push rods 4322, connected by a connecting part 4324. The two first push grooves 4312 are provided on opposite sides of the push sleeve 431, thereby providing stable two-point limiting and ensuring the force stability of the push sleeve 431. Correspondingly, a first push surface 4311 is provided on the groove wall of each of the two first push grooves 4312.

[0166] In some embodiments, a second pushing surface 4321 may be provided on the ends of the two push arms 4323 away from the connecting portion 4324, and the two second pushing surfaces 4321 shall respectively contact the two first pushing surfaces 4311.

[0167] In order to limit the radial displacement of the push sleeve 431, a limiting baffle 4322 can be set on each of the two push arms 4323. Specifically, the limiting baffle 4322 is set on the side of the push arm 4323 away from the other push arm, so that the two limiting baffles 4322 are blocked on opposite sides of the push sleeve.

[0168] To perform the pushing operation of push rod 432, a linear actuator 433 can be connected to push rod 432. Pushing push rod 432 in the second direction or resetting it will cause the linear actuator 433 to move the push sleeve 431 in the second direction, thus connecting the first transmission assembly 410 and the second transmission assembly 420 and establishing the torque transmission structure of the door opening and closing device. When the linear actuator 433 resets, push rod 432 releases push sleeve 431, disconnecting the connection between the first transmission assembly 410 and the second transmission assembly 420, and breaking the torque transmission structure of the door opening and closing device.

[0169] In some embodiments, the linear actuator 433 may employ linear motion components such as electromagnetic push rods or ball screws.

[0170] In some embodiments, the driver 110 is configured as a geared motor or a motor equipped with a reduction gearbox, thereby enabling reasonable control of output torque and speed.

[0171] When executing clutch control, the linear actuator 433 actuates, pushing the push rod 432 toward the push sleeve 431. The second push surface 4321 at the head end of the push rod 432 pushes the first push surface 4311, causing the push sleeve 431 to move upward, so that the push sleeve 431 moves toward the first transmission assembly 410. At the same time, it drives the first transmission member 421 of the second transmission assembly 420 to move toward the first transmission assembly 410 until the connecting end 4211 of the first transmission member 421 is embedded in the slot 411 of the first transmission member 410, establishing a circumferential transmission connection. At this time, the linear actuator 433 stays in the current position, and the push rod 432 supports the push sleeve 431 at the bottom, thereby maintaining the transmission connection state. The rotation of the actuator 110 drives the second transmission member 422 to rotate, which in turn drives the first transmission member 421, the first transmission assembly 410 and the linkage gear 120 to rotate, realizing the door opening and closing drive. When disconnection is required, the linear actuator 433 resets, and the push sleeve 431 falls naturally under its own weight. The connecting end 4211 gradually disengages from the slot 411 until the connection between the first transmission member 421 and the first transmission assembly 410 is broken, thereby disconnecting the connection between the linkage gear 120 and the actuator 110. During this process, the first transmission member 421 can slide axially relative to the second transmission member 422, realizing changes in its vertical position. Circumferential transmission is achieved through the engaging action of the internal locking block 4222 and the axial through groove 4217. It is worth noting that the action timing of the linear actuator 433 is not necessarily earlier than the action time of the actuator 110; that is, there is no necessary lag between the two.

[0172] In some embodiments, the door-opening mechanism 300 serves as an actuator that initially opens the door body 920 to a preset angle. Under the drive of the drive mechanism 100, it can achieve the door opening operation by gradually accumulating force.

[0173] See Figure 1 and Figure 4 In some embodiments, the door-top mechanism 300 includes a linkage 310 and a door-top component 320. One end of the linkage 310 is connected to the drive mechanism 100 to obtain driving force. The linkage 310 can move under the drive of the drive mechanism 100. The other end of the door-top component 320 is used to push the door body 920 to rotate. The door-top component 320 is connected to the linkage 310, so that the door-top operation and reset are performed under the drive of the linkage 310.

[0174] In some embodiments, one end of the linkage 310 is rotatably mounted on the base 600, allowing it to deflect around a pivot under the drive of the drive mechanism 100. The door-mounting component 320 is connected to the linkage 310, allowing it to move along an arc-shaped trajectory following the linkage 310, and continuously pushes the door 920 after contacting it. The deflection structure of the linkage 310 can reduce the frontal pressure on the door-mounting mechanism 300 to a certain extent while ensuring the pushing effect, thereby ensuring structural stability and service life, and improving the reliability of the door-mounting operation.

[0175] In some embodiments, to further improve the efficiency of the door-top operation, the door-top component 320 can be rotatably connected to the linkage component 310, thereby allowing the door-top component 320 to deflect relative to the linkage component 310 and adjust its posture. This allows the door-top component 320 to adaptively adjust its orientation according to installation conditions, ensuring it faces the door body 920 and guarantees high-efficiency pushing. Furthermore, the door-top mechanism 300 can adapt to different installation conditions, flexibly adjusting the cooperation state between the linkage component 310 and the door-top component 320 to ensure high-efficiency pushing performance.

[0176] In some embodiments, the top door component 320 is rotatably connected to the middle of the linkage component 310, providing sufficient deflection space for the top door component 320 to avoid interfering with other structures.

[0177] To ensure high door-lifting efficiency, the pushing direction of the door-lifting component 320 can be roughly set perpendicular to the closed door body 920. Since the door-lifting component 320 rotates with the linkage component 310, the pushing direction will also deflect to a certain extent. To ensure that the door-lifting component 320 applies a stable pushing force as perpendicularly as possible to the door body 920, a slotted hole 322 can be made in the door-lifting component 320, and a pin 360 can be set on the linkage component 310. By movably embedding the pin 360 within the slotted hole 322, the door-lifting component 320 deflects relative to the linkage component 310. Simultaneously, the space along the length of the slotted hole 322 provides sliding space for the pin 360, allowing the door-lifting component 320 to slide relative to the length of the slotted hole 322 without having to move with the linkage component 310, thus maintaining the stability of the pushing direction of the door-lifting component 320. The length of the waist-shaped hole 322 can be designed to match the size of the top door stroke. For example, the longer the top door stroke, the longer the waist-shaped hole 322 will be.

[0178] In some embodiments, in order to meet the requirements of large pushing force and pushing stroke with a smaller opening size, the length direction of the waist-shaped hole 322 can be set along the pushing direction perpendicular to the top door member 320. In other embodiments, the length direction of the waist-shaped hole 322 does not necessarily have to be set strictly perpendicular to the pushing direction of the top door member 320, and can also have a certain included angle, as long as the moving stroke of the pin 360 has a component in the pushing direction perpendicular to the top door member 320, thereby ensuring the stability of the axial pushing posture of the pushing rod 320; for example, the included angle can be set to 30 degrees, 45 degrees, or 60 degrees.

[0179] In some embodiments, in order to ensure the force balance of the top door component 320, the linkage component 310 can be arranged below the top door component 320 to support the top door component 320 to a certain extent, so that the pin 360 is stably embedded in the waist-shaped hole 322 in its axial direction without the risk of disengagement, thereby ensuring the stability of the pivoting function and relative sliding function of the waist-shaped hole 322 and the pin 360.

[0180] In some embodiments, the waist-shaped hole 322 can be provided on the linkage member 310, and the pin 360 can be provided on the top door member 320. In order to ensure the stability of the pivoting function and the relative sliding function, the linkage member 310 can also be provided above the top door member 320, which is not limited here.

[0181] In some embodiments, to reduce the overall installation height, shrink the equipment size, and lower the installation space requirements and material costs, a thickness-reducing groove 312 can be formed on the linkage 310 while ensuring the structural strength of the linkage 310, thereby reducing the combined thickness of the linkage 310 and the top door component 320. The width of the thickness-reducing groove 312 can be set to be slightly larger than the width of the area where the top door component 320 deflects within the oblong hole 322, to prevent the sidewalls of the thickness-reducing groove 312 from obstructing the relative deflection of the linkage 310 and the top door component 320.

[0182] See Figure 2 and Figure 11 In some embodiments, due to the friction between the pin 360 and the oblong hole 322, the top door component 320 may still tend to move perpendicular to the pushing direction during the deflection of the linkage 310. To address this, a guide groove 632 can be provided on the base 600, allowing the top door component 320 to slide within the guide groove 632 along a predetermined pushing direction, thus limiting its displacement perpendicular to the pushing direction and ensuring the stability of the top door operation. To enhance the guiding and limiting effect, the width of the guide groove 632 perpendicular to the pushing direction can be set slightly larger than the width of the top door component 320, leaving only a certain sliding clearance.

[0183] In some embodiments, in order to ensure smooth sliding of the top door component 320, a self-lubricating material layer can be provided on the groove surface of the guide groove 632, or a self-lubricating material layer can be provided on the corresponding portion of the guide groove 632 of the top door component 320, or both the groove surface of the guide groove 632 and the corresponding portion of the guide groove 632 of the top door component 320 can be provided with a self-lubricating material layer, or directly formed from a self-lubricating material to further reduce the impact of friction.

[0184] See Figure 2 In some embodiments, considering the influence of assembly accuracy and fitting clearance, a pusher seat 330 can be hinged to the end of the top door component 320 away from the linkage component 310. Thus, when the top door component 320 abuts against the door body 920, the pusher seat 330 will abut against the door body 920 first and can adaptively deflect, so that the pusher seat 330 and the door body 920 can achieve surface-to-surface contact, ensuring the stability of the size and posture of the contact surface, ensuring the stability of the direction and magnitude of the force applied to the top door, and reducing the risk of damage to the door body or the top door component 320 caused by excessive contact pressure due to local contact push.

[0185] In some embodiments, to improve adaptability in various directions, the pusher seat 330 and the top door component 320 may be connected by a universal hinge structure.

[0186] In some embodiments, to reduce contact vibration between the push seat 330 and the door body 920, and to reduce wear on the push seat 330, a damping pad 340 may be provided on the push seat 330. The damping pad 340 may be made of a material with a low coefficient of friction.

[0187] In some embodiments, the second end of the linkage 310 is provided with a first tooth 313 that meshes with the drive mechanism 100, thereby driving the linkage 310 to rotate through gear meshing transmission, thereby achieving precise control of the rotation amplitude of the linkage 310, and thus improving the control accuracy of the pushing stroke of the top door mechanism 300.

[0188] In some embodiments, considering that the opening angle of the top door is mostly set based on the angle required to overcome the suction force between the door body 920 and the housing 910 and the resistance of the rotating door during the top door operation, the deflection angle of the door body 920 relative to the housing 910 can be set to about 3 degrees, and the corresponding pushing stroke is also relatively small. The deflection angle of the linkage 310 can also be set at a lower level. Usually, the preset deflection angle can be used to calibrate the arrangement position of the linkage 310 on the base 600 according to the engagement state, so that the linkage 310 corresponds to a preset angle or preset position on the base 600.

[0189] See Figure 4In some embodiments, to ensure the control accuracy of the rotation angle of the linkage 310, an elastic limiting member 370 can be connected between the base 600 and the linkage 310 to always pull the linkage 310 towards the preset position. This ensures control accuracy while also guaranteeing the alignment accuracy and stability of its meshing connection with the drive mechanism 100.

[0190] In some embodiments, the elastic limiting member 370 may be a tension spring, with its two ends connected to the linkage member 310 and the base 600 respectively, applying a stable elastic tension force through elastic elongation deformation. It can adapt to the deflection process of the linkage member 310 based on the adaptive deformation of the tension spring, ensuring the stability of the elastic tension effect. In other embodiments, the elastic limiting member 370 may also be other forms of elastic members such as a spring.

[0191] See Figure 4 , Figure 6 and Figure 11 In some embodiments, a third fixing seat 314 can be provided on the linkage 310 and a fourth fixing seat 635 can be provided on the base 600, respectively fixing the two ends of the tension spring to improve the stability of the tension spring under deflection and deformation.

[0192] In some embodiments, a first stop 630 may be provided on the base 600 and arranged at the end of the preset deflection stroke of the linkage 310. When the top door mechanism 300 deflects relative to the base 600 to a preset angle, it abuts against the first stop 630, thereby limiting the excessive deflection of the linkage 310 and limiting the further deflection of the top door mechanism 300 as a whole. At the same time, it can also ensure that the first tooth 313 and the drive mechanism 100 establish a stable meshing connection.

[0193] See Figure 11 In some embodiments, the linkage 310, driven by the drive mechanism 100, will undergo top door deflection and reset deflection, thus generating two opposite deflections relative to the base 600, resulting in two deflection limit positions. To ensure the position control accuracy of the linkage 310, a first stop surface 633 and a second stop surface 634 can be respectively provided on the first stop component 630, and respectively arranged at the two ends of the preset deflection stroke of the linkage 310 to achieve bidirectional limiting. The first stop surface 633 and the second stop surface 634 can be configured to match the outer surface of the linkage 310, improving the reliability of contact limiting.

[0194] In some embodiments, the first stop 630 may be an independent structural component mounted on the base 600, with a height slightly higher than the arrangement height of the linkage 310, thereby achieving the stopping function. In other embodiments, the first stop 630 may also be directly formed on the base 600, forming an integrated structure with a stop surface or stop portion on the base 600.

[0195] In some embodiments, the first stop 630 can be configured in conjunction with the elastic limiting member 370, so that by arranging the installation position of the elastic limiting member 370, the linkage 310 can be elastically pulled or elastically pressed against the first stop 630.

[0196] See Figure 4 and Figure 11 In some embodiments, an elastic member receiving groove 631 can be formed on the first stop member 630, and the first end of the elastic limiting member 370 can be connected in the elastic receiving groove 631. This not only enables the assembly of the elastic limiting member 370 on the base 600, but also protects the elastic limiting member 370 through the groove structure, avoiding scratches and collisions that affect its deformation state, thereby ensuring the reliability and accuracy of the positioning control of the linkage member 310.

[0197] See Figure 4 , Figure 6 and Figure 7 In some embodiments, the fourth fixing seat 314 may be disposed on the linkage 310 between the first tooth 313 and the pin 360, that is, between the force receiving point and the force application point of the linkage 310, which to a certain extent improves the elastic limiting effect and enhances the performance of the linkage 310 in resisting vibration and external interference.

[0198] In some embodiments, in order to accommodate the deflection action of the linkage 310, the second end of the elastic limiting member 370 will also deflect to a certain extent, so that the elastic limiting member 370 as a whole will deflect with its first end as the center. In order to avoid the elastic receiving groove 631 scraping against the top and affecting its deformation state, the groove shape of the elastic receiving groove 631 can be set as a fan-shaped shape to leave enough deflection space.

[0199] In some embodiments, the linkage 310 can be configured as a plate with its thickness direction perpendicular to the deflection direction, thereby ensuring structural strength under top door operation conditions and reducing the overall assembly thickness of the linkage 310, thus lowering the installation height requirement. The top door component 320 can also be configured as a plate with its thickness direction perpendicular to both the deflection and pushing directions, further reducing the overall assembly height. In other embodiments, the linkage 310 and the top door component 320 can also be configured as rods.

[0200] See Figure 6 and Figure 7In some embodiments, the first tooth 313 can be disposed at the first end of the plate body of the linkage member 310, and a linkage member pivot hole 311 can be opened at the second end of the plate body of the linkage member 310. A linkage member pivot shaft 350 is disposed on the base 600, and the linkage member pivot shaft 350 is rotatably embedded in the linkage member pivot hole 311, thereby allowing the linkage member 310 to rotate relative to the base 600, reducing its overall volume while satisfying its linkage function. In other embodiments, the waist-shaped hole 322 can also be disposed at the first end of the plate body of the top door member 320, reducing its length and width while satisfying the top door function requirements, thus reducing its overall volume.

[0201] In some embodiments, reinforcing ribs may be provided on the main body of the plate to improve the structural strength of the linkage 310 and the top door 320.

[0202] When assembling into an electrical device having a housing 910 and a door 920 hinged thereon, the base 600 can be fixed to the housing 910, and the top door member 320 can be aligned with the door 920. During the opening operation, the drive mechanism 100 drives the linkage 310 to deflect forward relative to the base 600, causing the top door member 320 to slide along the guide groove 632 until it contacts the door 920 and the pushing force gradually increases until it overcomes the attraction force and other rotational resistance between the door 920 and the housing 910, thus opening the door 920. During the closing operation, the drive mechanism 100 drives the linkage 310 to deflect in the opposite direction relative to the base 600, causing the top door member 320 to slide in the opposite direction along the guide groove 632 until it returns to its original position.

[0203] See Figure 5 In some embodiments, the top door mechanism 300 may also be configured as an integral top door member 380, and the top door member 380 may be rotatably mounted on the base 600 via a pivot similar to the linkage pivot 350. The top door member 380 may be divided into functional areas, and may be provided with a fourth tooth 381 for engaging with the drive mechanism 100, which drives the top door member 380 to rotate when the drive mechanism 100 is started; and may be provided with a top door portion 382, ​​which pushes the door body 920 when rotated under the drive of the drive mechanism 100, until the door body 920 is opened to a set opening degree.

[0204] In some embodiments, the top door member 380 is a fan-shaped structure, and the top door portion 382 is one end corner of the fan-shaped structure. When the top door member 380 rotates, it pushes the door body 920 along an arc-shaped trajectory. In other embodiments, the top door member 380 can be configured as a cam structure, and the first tooth 381 and the top door portion 382 can be disposed on the rim of the cam. The cam rotates relative to the base 600 and is driven by the drive mechanism 100 to smoothly push the door body 920 along an arc-shaped trajectory, reducing the severity of impact vibration.

[0205] In some embodiments, to improve structural strength, reinforcing ribs 383 may be provided on the fan-shaped structural member.

[0206] See Figure 20 , Figure 21 and Figure 22 In some embodiments, the base 600 is configured to be assembled from two mating independent housings, which can be secured with fasteners such as screws. Windows can be provided in the areas corresponding to the movement of the top door component 320 or top door-shaped component 380, the revolving door component 220, and the driving component 210. This facilitates the extension of the top door component 320 or top door-shaped component 380, the revolving door component 220, and the driving component 210, ensuring smooth operation of the door opening and closing, while also allowing for orderly storage and protecting its internal functional structure.

[0207] In some embodiments, a shaft reinforcement and fixing structure may be provided corresponding to the positions of the coaxial rotating shaft 211 and the linkage pivot shaft 350 to ensure the reliability of the pivot structure.

[0208] In some embodiments, a coaxial pivot seat 650 is provided on the base 600 for rotatably fixing the coaxial pivot 211, thereby improving structural stability, significantly enhancing impact resistance, and ensuring that the revolving door mechanism 200 and the linkage gear 20 are stably and reliably coaxially pivotally connected on the base 600. A drive motor fixing groove 610 for fixing the driver 110 is provided on the base 600.

[0209] See Figure 26 and Figure 27 This embodiment also provides a refrigerator, which is the aforementioned electrical appliance. The refrigerator includes a cabinet 910 and a door 920, with the door 910 rotatably mounted on the cabinet 910. A door opening and closing device is connected between the cabinet 910 and the door 920, used to push or deflect the door 920 relative to the cabinet 910 to realize the door opening and closing operation.

[0210] In some embodiments, the door opening and closing device is provided with a base 600 fixed on the cabinet 910, and the top door component 320 or the top door-shaped component 380 points towards or abuts against the door 920, and the rotating door component 220 is hinged to the door 920 via a hinge seat 230. In other embodiments, the base may be an integrated surface structure formed on the top of the cabinet 910, serving the function of a base. In still other embodiments, the base 600 may also be provided on the door 920, with the top door component 320 or the top door-shaped component 380 pointing towards or abutting against the cabinet 910, and the rotating door component 220 hinged to the cabinet 910 via a hinge seat 230. In some embodiments, the refrigerator is provided with multiple doors 920, and an independent door opening and closing device may be provided for each door 920 to realize the automatic door opening and closing function of a multi-door refrigerator.

[0211] See Figure 28 and Figure 29 When performing the door opening operation, the linkage gear 120 rotates forward, driving the door-pushing mechanism 300 to directly push the door body 920. After the linkage gear 120 rotates a certain angle, the continuing pushing force reaches the critical value of breaking through the door opening resistance, opening the door body and maintaining it at a certain angle. As the linkage gear 120 continues to rotate forward, the first tooth 313 and the second tooth 1221 disengage. The linkage rod 310 is pulled tight on the first stop 630 under the action of the elastic limit member 370. During the process, the driving member 210 of the revolving door mechanism 200 moves from the first pushing part 1231 to the second pushing part 1232. When the driving member 210 touches the second pushing part 1232, it can continue to rotate forward with the linkage gear, pushing the door body 920 until it reaches the set limit position, realizing the door opening and revolving operation.

[0212] See Figure 23 , Figure 24 , Figure 25 and Figure 30 When performing the closing operation, the linkage gear 120 reverses. When the first pushing part 1231 abuts against the driving part 210, it continues to reverse and pushes the driving part 210 to reverse, pulling the door part 320 and the door body 920 to rotate towards the box body 910 until the box body is closed, thus realizing the closing operation. During the process, the linkage gear 120 rotates to a certain angle position and is connected to the first tooth 313 through the second tooth 1221, pushing the linkage part 310 to reverse until it reaches the initial position.

[0213] The beneficial effects of the present invention include at least the following:

[0214] This invention provides a door opening and closing device and electrical equipment. A door-pushing mechanism and a door-turning mechanism, driven by a drive mechanism, respectively achieve automatic door-pushing and door-turning operations, improving the convenience and safety of door opening. The door-pushing mechanism pushes the door, accumulating force to overcome opening resistance and open the door to a set angle, thereby significantly reducing the resistance of the subsequent door-turning mechanism and increasing the automatic door opening speed. Specifically, a rotating drive component mounted on the base acts as a push arm, utilizing the lever principle to significantly improve the pushing efficiency during the door-turning stage under the push of the drive mechanism. The door-turning component is rotatably connected to the drive component and the door, allowing it to adapt to changes in the deflection posture of the linkage component by deflecting relative to the drive component and the door, maintaining a stable hinge to the door and improving the pushing and pulling effect during the door-turning process. A linkage gear enables asynchronous control of the door-pushing and door-turning mechanisms, allowing for the reasonable sequential execution of door-pushing and door-turning operations. A clutch device is installed between the linkage gear and the drive unit, allowing for a separable connection between them. This enables the top door mechanism and the rotating door mechanism to be separated and connected to the drive unit according to different operating conditions, effectively isolating the actuator and drive mechanism. This avoids interference between manual and automatic door opening / closing operations, as well as minimizing impacts on the structural stability and safety of the door opening / closing device. Furthermore, the hinge points C between the rotating door component and the door body, A between the rotating door component and the drive component, D between the drive component and the base, and B between the door body and the housing are rationally arranged so that hinge point A and the rotation center B are located on opposite sides of the line connecting hinge points C and D, forming a convex quadrilateral. This prevents the drive component and the rotating door component from deflecting more than 180 degrees during rotation, thus avoiding the extreme state where the rotating door component is not under force and preventing problems such as the inability to rotate the door body or limiting the door opening range.

[0215] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0216] In the description of this application, it should be understood that 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 used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0217] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0218] In the description of this invention, unless otherwise expressly specified and limited, "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" 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.

[0219] In the description of this specification, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that 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. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0220] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0221] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A door opening and closing device, characterized in that, The application relates to a door opening and closing mechanism. The top door mechanism and the rotating door mechanism are driven by the same driving mechanism. The rotating center B of the door body and the hinge point A are located on the two sides of the line connecting the hinge point C and the hinge point D. The top door mechanism comprises a linkage and a top door piece. The driving mechanism drives the linkage to rotate and drives the top door piece to push the door body. The hinge point A, the hinge point C, the rotating center B and the hinge point D form a parallelogram. The driving mechanism comprises a linkage gear. The linkage gear comprises a body, a first pushing part and a second pushing part. The top door mechanism comprises a first gear part.

2. The door opening and closing device according to claim 1, wherein The body is coaxially arranged on the base.

3. A door opening device according to claim 1 or 2, wherein The top door mechanism further comprises an elastic limiting part. The top door mechanism is rotatably arranged on the base. The top door mechanism further comprises a limiting part and a top door part. ​ 4. The door opening device according to claim 3, wherein ​ 5. The door opening device according to claim 4, wherein ​ 6. The door opening device according to claim 3, wherein ​ 7. The door opening device as claimed in claim 1, wherein ​ ​ 8. The door opening and closing device according to claim 1 or 2, wherein ​ 9. The door opening device according to claim 8, wherein ​ ​ A tensioning member is connected to the top door mechanism and the base respectively to maintain the top door mechanism at the preset angle.

10. The door opening device as claimed in claim 8, wherein The top door mechanism is in the shape of a cam, and the first tooth part and the top door part are located on the rim of the cam.

11. The door opening and closing device according to claim 1 or 2, wherein The driving mechanism comprises: a driver; a first transmission assembly; a second transmission assembly connected to the driver and simultaneously separably connected to the first transmission assembly; a clutching and pushing assembly for separating or connecting the second transmission assembly and the first transmission assembly; a linkage gear connected to the first transmission assembly and driving the belt member to rotate and the top door mechanism to push the door body.

12. The door opening device according to claim 11, wherein The clutching and pushing assembly comprises a pushing sleeve sleeved on the second transmission assembly and a push rod for pushing the pushing sleeve, and the pushing sleeve is pushed by the push rod to separate the first transmission assembly from the second transmission assembly.

13. The door opening device according to claim 12, wherein The second transmission assembly comprises: a first transmission member comprising a connecting end separably connected to the first transmission assembly and a pushing end embedded in the pushing sleeve, and an axial through slot is formed on the inner surface of the first transmission member; a second transmission member provided with a clamping block on the outer surface, and the clamping block is axially and slidingly embedded in the axial through slot when the first transmission member is sleeved on the second transmission member; a transmission shaft connected to the driver, and the second transmission member and the first transmission assembly are sleeved on the transmission shaft.

14. The door opening device as claimed in claim 12, wherein The pushing sleeve pushes the second transmission assembly in a first direction, the pushing sleeve is provided with a first pushing surface, and the push rod is provided with a second pushing surface in contact with the first pushing surface, wherein the included angle between the first direction and the first pushing surface is an acute angle.

15. The door opening device as claimed in claim 12, wherein The pushing sleeve pushes the second transmission assembly in a first direction; The pushing sleeve is provided with two first pushing grooves on the opposite sides of the pushing sleeve, and the groove walls of the two first pushing grooves are respectively provided with first pushing surfaces; The push rod comprises two parallel push arms and a connecting portion connecting the two push arms, and the end portions of the two push arms away from the connecting portion are provided with second pushing surfaces, and the two second pushing surfaces are respectively in contact with the two first pushing surfaces.

16. An electrical appliance, characterized by The electric appliance is one of a refrigerator, a sterilizer, and a dishwasher.

17. The appliance of claim 16, wherein, The electric appliance is one of a refrigerator, a sterilizer, and a dishwasher.

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