A door opening and closing device and electrical equipment

Abstract

This invention belongs to the field of electrical technology, specifically relating to a door opening and closing device and electrical equipment. The door opening and closing device includes a top door mechanism and a revolving door mechanism driven by the same drive structure. The revolving door mechanism includes a driving member and a revolving door component. A first end of the revolving door component is rotatably mounted on the door body, and a second end of the revolving door component is rotatably connected to the first end of the driving member. The second end of the driving member is rotatably mounted on a base. The drive mechanism includes a linkage gear, which drives the driving member to rotate, thereby causing the revolving door component to rotate the door body, and also drives the top door mechanism to push against the door body. This application can improve the pushing and pulling effect during the revolving door process.

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, which aims 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, characterized in that it includes: a top door mechanism and a rotating door mechanism driven by the same drive mechanism;

[0006] The revolving door mechanism includes a driving component and a revolving door component. The first end of the revolving door component is rotatably mounted on the door body, and the second end of the revolving door component is rotatably connected to the first end of the driving component. The second end of the driving component is rotatably mounted on the base.

[0007] The driving mechanism includes a linkage gear, which can drive the drive component to rotate so as to drive the revolving door component to rotate the door body, and drive the top door mechanism to push the door body.

[0008] In some implementations, the linkage gear includes:

[0009] The main body is rotatably mounted on the base;

[0010] A first pushing part is disposed on the main body. When the main body rotates in the forward direction, it pushes the driving member to rotate, which in turn drives the revolving door member to rotate, thereby opening the door.

[0011] 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, and the driving member drives the rotating door member to rotate, so as to close the door.

[0012] In some embodiments, the driving member 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 driving member.

[0013] In some implementations, the linkage gear further includes a third jacking part that drives the door-pushing mechanism to push the door body when the main body rotates in the forward direction.

[0014] In some embodiments, the door-mounting mechanism includes a first toothed portion, and the third pushing portion is provided with a second toothed portion that meshes and drives with the first toothed portion.

[0015] As a preferred embodiment of this application, the first angle is less than or equal to the second angle, wherein the second angle is the angle of rotation of the linkage gear from the start of meshing between the first tooth and the second tooth to the separation of the first tooth and the second tooth.

[0016] In some implementations, the difference between the first angle and the second angle is less than or equal to 1 degree.

[0017] In some implementations, the main body is provided with a rotation limiting groove, 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.

[0018] In some implementations, the revolving door mechanism further includes:

[0019] A return spring is connected at both ends to the main body and the driving member, respectively, so as to pull the driving member against the second push part after the door is opened.

[0020] As a preferred embodiment of this application, the driving component and the rotating door component are rod-shaped.

[0021] In some embodiments, the driving element and the linkage gear are coaxially rotatably mounted on the base.

[0022] In some implementations, the base is provided with a third stop and a fourth stop. When the door is closed, the third stop prevents the linkage gear from rotating, and when the door is opened to its limit position, the fourth stop prevents the linkage gear from rotating.

[0023] As a preferred embodiment of this application, the rotation angle of the linkage gear between the third stop and the fourth stop is less than 130 degrees.

[0024] In some embodiments, the door-mounting mechanism is rotatably mounted on the base. The door-mounting mechanism includes a first toothed portion that meshes with the linkage gear and a door-mounting portion for pushing the door body. The linkage gear drives the door-mounting mechanism to rotate relative to the base through the first toothed portion, thereby causing the door-mounting portion to push the door body.

[0025] In some implementations, the top door mechanism further includes:

[0026] A limiting component is provided on the base, and the top door mechanism abuts against the limiting component when it rotates relative to the base to a preset angle;

[0027] 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.

[0028] 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.

[0029] An electrical appliance, characterized in that it includes a housing, a door rotatably disposed on the housing, and the aforementioned door opening and closing device, wherein the base is disposed on the housing.

[0030] In some implementations, the electrical appliance is one of a refrigerator, a sterilizer, or a dishwasher.

[0031] The beneficial effects of the present invention include at least the following:

[0032] 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. Attached Figure Description

[0033] 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.

[0034] Figure 1 This is a schematic diagram of the opening and closing device provided in an embodiment of the present invention;

[0035] Figure 2 for Figure 1 A schematic diagram of the top door mechanism of the door opening and closing device in the diagram;

[0036] Figure 3 for Figure 1 Another structural schematic diagram of the top door mechanism of the door opening and closing device in the picture;

[0037] Figure 4 for Figure 1 A schematic diagram of the revolving door mechanism in the door opening and closing device;

[0038] Figure 5 for Figure 1 A schematic diagram showing the arrangement of the revolving door mechanism in the door opening and closing device;

[0039] Figure 6 for Figure 1 A top view of the assembly state of the drive component and linkage gear of the door opening and closing device;

[0040] Figure 7 for Figure 1 A front view of the assembly state of the drive component and linkage gear of the door opening and closing device;

[0041] Figure 8 for Figure 1 A bottom view of the assembly state of the linkage components and linkage gears of the door opening and closing device;

[0042] Figure 9 for Figure 1 A top view of the linkage gear of the door opening and closing mechanism;

[0043] Figure 10 for Figure 1 Front view of the linkage gear of the door opening and closing device;

[0044] Figure 11 for Figure 1 A bottom view of the linkage gear of the door opening and closing device;

[0045] Figure 12 for Figure 1 Assembly diagram of the door opening and closing device;

[0046] Figure 13 for Figure 1 Top view of the assembly state of the door opening and closing device;

[0047] Figure 14 for Figure 1 A bottom view of the assembly state of the door opening and closing device in the middle;

[0048] Figure 15 for Figure 1 Top view of the refrigerator assembly layout of the door opening and closing mechanism;

[0049] Figure 16 for Figure 1 A partial structural diagram of the refrigerator assembly layout for the door opening and closing mechanism;

[0050] Figure 17 for Figure 1 A schematic diagram of the refrigerator assembly layout for the door opening and closing mechanism;

[0051] Figure 18 for Figure 1 A schematic diagram of the top door status of the door opening and closing device in the middle;

[0052] Figure 19 for Figure 1 A schematic diagram of the door opening and revolving door state of the door opening and closing device in the diagram;

[0053] Figure 20 for Figure 1 A schematic diagram of the closed and rotating door state of the door opening and closing device.

[0054] In the attached image:

[0055] 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;

[0056] 200-Revolving door mechanism, 210-Drive component, 211-Coaxial rotating shaft, 212-First fixed seat, 213-Extension limiting part, 214-Pivot shaft, 220-Revolving door component, 221-First end of revolving door component, 230-Hinge seat, 240-Reset spring;

[0057] 300-Top door mechanism, 310-Linkage component, 313-First tooth, 320-Top door component, 350-Linkage component pivot, 380-Top door type component, 381-Fourth tooth, 382-Top door part, 383-Reinforcing rib;

[0058] 600 - Base, 620 - Second stop, 621 - Stop profile;

[0059] 910 - Box body, 920 - Door body. Detailed Implementation

[0060] 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.

[0061] 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.

[0062] 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.

[0063] This application is described below with reference to the accompanying drawings and specific embodiments:

[0064] 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.

[0065] 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.

[0066] See Figure 1 Specifically, 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.

[0067] See Figure 1In 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-process revolving door operation and the initial door-mounting operation of the door body 920; 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.

[0068] 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 drive mechanism 100, the rotating door mechanism 200, and the top door mechanism 300. This allows the drive mechanism 100, the rotating door mechanism 200, and the 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.

[0069] 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.

[0070] 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 920. For example, when the door opens automatically, the top door mechanism 300 is first driven to push the door 920 until it overcomes the suction force of the door, opening the door 920 at a certain angle. Then, the revolving door mechanism 200 continues to rotate the door 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 920 towards the housing 910 until it closes. During this process, the drive mechanism 100 simultaneously drives the top door mechanism 300 to reset.

[0071] 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.

[0072] In some embodiments, the revolving door mechanism 200 or the top door mechanism 300 can 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 independently. In this embodiment, the top door mechanism 300 cooperates with the drive mechanism 100 to overcome the adsorption resistance, negative pressure and other opening resistance between the door body 920 and the housing 910, so as to push the door body 920 open to a preset angle to facilitate subsequent automatic or manual door opening operations.

[0073] 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.

[0074] 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.

[0075] See Figure 1 and Figure 4 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.

[0076] To accommodate the large deflection range of the door body 920 and ensure that the efficiency and range of the revolving door's operation meet the opening and closing requirements, the first end of the revolving door component 220 is rotatably mounted on the door body 920, the second end of the revolving door component 220 is pivotally connected to the first end of the driving component 210, and the second end of the driving component 210 is rotatably mounted on the base 600, forming a two-stage rotating linkage push-pull structure. Thus, by driving the driving component 210 to rotate, the pushing-pull and deflection actions of the revolving door component 220 can be achieved, respectively meeting the requirements of fixed-point pushing and pulling force on the door body 920 and adapting to the large-angle deflection state changes of the door body 920 during opening and closing, ensuring the stability and reliability of the revolving door mechanism 200's push-pull opening and closing operation. The drive mechanism 100 drives the driving component 210 and the top door mechanism 300 respectively through a linkage gear 120, achieving a simplified transmission structure and helping to ensure coordinated control of the revolving door operation and the top door operation.

[0077] See Figure 4In 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.

[0078] See Figure 5 In some embodiments, in order to ensure the turning efficiency and structural stability of the revolving door mechanism 200 and reduce the influence 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 combination with the rotation center point B of the door body 920 of the electrical equipment 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 drive component 210 and the revolving door component 220 from deflecting by more than 180 degrees during rotation, which would result in the revolving door component 220 being unloaded and unable to rotate the door body 920. It also avoids limiting the opening range of the door body 920 and affecting its use.

[0079] In some embodiments, to maximize the opening angle of the door body 920 and the cabinet 910 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 body 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 body 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.

[0080] See Figure 4 , Figure 9 , Figure 10 and Figure 11In some embodiments, the linkage gear 120 serves as a direct drive component for the drive member 210 and the door-mounting mechanism 300, and its driving method should simultaneously satisfy the operating modes of both the deflectable drive member 210 and the door-mounting mechanism 300. The body of the linkage gear 120 can be configured as a rotating component on the base 600, and it is provided with a third tooth 121 that meshes with the upstream driver 110, driving the door-mounting mechanism 300 and the drive member 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 arranged opposite to each other on the main body, with sufficient space between them to accommodate the drive component 210. In the actual assembly 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.

[0081] See Figure 4 , Figure 9 , Figure 10 and Figure 11 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.

[0082] 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 when it is pushed. 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.

[0083] 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.

[0084] 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.

[0085] See Figure 4 In some embodiments, to improve the rotation control accuracy and reliability of the drive component 210, the body and the first end of the drive component 210 can be coaxially and rotatably mounted on the base 600. This allows for 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. Instead, the drive component 210 can be pivotally connected to the body of the linkage gear 120, forming a structure similar to a crankshaft drive. Alternatively, the drive component 210 can be rotatably mounted on the base, with two push arms extending out. A first jacking part 1231 and a second jacking part 1232 are respectively mounted on the two push arms, and the drive component 210 is arranged between the beam push arms to achieve a jacking operation. The specific arrangement position and structural specifications can be determined experimentally.

[0086] See Figure 7 as well as Figure 8 In some embodiments, a third pushing part 122 is provided on the body of the linkage gear 120 to drive the top door mechanism 300, for connecting and driving the top door mechanism 300. During the door opening operation, the body of the linkage gear 120 rotates forward, driving the top door 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 top door mechanism 300 to reset.

[0087] 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 300 is also small. Correspondingly, the connection of the linkage gear 120 and the stroke and time of the door-opening mechanism 300 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 300 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.

[0088] See Figure 8 To improve the timing control accuracy and reliability of connection and disconnection, a first tooth 313 can be provided on the top door mechanism 300, and a second tooth 1221 meshing with the first tooth 313 is provided on the third pushing part 122. 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 300 to push the door body 920 through meshing transmission until disengagement, at which point the top door mechanism 300 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 300 moves in the reverse pushing direction under the drive of the linkage gear 120 until it returns to its original position.

[0089] In some embodiments, the top door stroke control of the top door mechanism 300 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.

[0090] 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 drive member 210 abuts against the second push 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.

[0091] See Figure 5 and Figure 6In 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. A 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.

[0092] See Figure 1 , Figure 2 as well as Figure 6 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 1232. 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.

[0093] See Figure 6 In some embodiments, for ease of fixing, a first fixing seat 212 can be provided on the drive member 210 to fix the first end of the return spring 240; a second fixing seat 125 can also be provided on the body of the linkage gear 120 to fix the second end of the return spring 240.

[0094] See Figure 6 and Figure 9 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.

[0095] 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.

[0096] In some embodiments, the drive member 210 and the door member 220 may be configured as plates, thereby greatly reducing the installation height when stacked.

[0097] See Figure 7 In 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 and assembly height in the pivoted stacked state. Alternatively, one of the drive member 210 and the revolving door member 220 can be rotatably mounted on the lower plate-like member with a pivot shaft 214 supporting the upper plate-like member, forming a stable and reliable pivot structure. 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.

[0098] In some embodiments, to improve the stability and positioning reliability of the linkage gear 120, a third stop and a fourth stop 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 stops the linkage gear 120 from rotating; when the door 920 is opened to its limit position, the fourth stop stops the linkage gear 120 from rotating.

[0099] In some embodiments, the rotation limit angle of the linkage gear 120 can be determined according to the design opening of the door body 920. The rotation angle of the linkage gear 120 between the third stop and the fourth stop can be set to 130 degrees or more; it can be set to 120 degrees or other specific degrees.

[0100] See Figure 6 In 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.

[0101] See Figure 1 , Figure 4 and Figure 11In 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. The initial position of the driving member 210 can be set against the first pushing part 1231 to constrain it 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.

[0102] 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.

[0103] See Figure 2 In some embodiments, the door-top mechanism 300 includes a linkage 310 and a door-top component 320. The linkage 310 is connected to the drive mechanism 100 and is used to obtain driving force. The linkage 310 can move under the drive of the drive mechanism 100. 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.

[0104] See Figure 2 In some embodiments, 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 top door component 320 is rotatably 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 ensures the pushing effect while reducing the frontal pressure on the top door mechanism 300 to a certain extent, thereby ensuring structural stability and service life, and improving the reliability of the top door operation.

[0105] See Figure 3The top door mechanism 300 may differ from the above structure. It may be configured as a top door type 380, and the top door type 380 may be rotatably mounted on the base 600 via the pivot shaft 350 of the linkage member. The top door type 380 may be divided into functional areas, i.e., it may be provided with a fourth tooth 381 for meshing with the drive mechanism 100. When the drive mechanism 100 is activated, it drives the top door type 380 to rotate. A top door portion 382 may be provided on the top door type 380. When it rotates with the linkage gear 120, it pushes the door body 920 until the door body 920 is opened to a certain degree.

[0106] See Figure 3 The top door component 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 component 380 rotates, it pushes the door body 920 along an arc-shaped trajectory. In other embodiments, the top door component 380 can be configured as a cam structure, and the fourth tooth portion 381 and the top door portion 382 can be disposed on the rim of the cam.

[0107] In some embodiments, the top door member 380 may also be provided with reinforcing ribs 383 to improve the overall strength and ensure the reliability of the top door operation.

[0108] See Figure 18 , Figure 19 and Figure 20 In this embodiment, when the door opening device performs the door opening operation, the drive mechanism 100 is activated, and the linkage gear 120 rotates forward relative to the base 600, driving the top door mechanism 300 to push the door body 920. At the same time, as the linkage gear 120 continues to rotate forward, the drive member 210 and the second push part 1232 move closer to each other. When the drive member 210 touches the second push part 1232, it follows the linkage gear 120 to rotate forward under the push of the second push part 1232, moving closer to the door body 920, and pushing the rotating door member 220 to rotate relative to the door body 920 and push the door body 920. When the top door mechanism 300 pushes the door body 920 open to the preset opening degree or before, the drive member 210 and the rotating door member 220 continue to follow the linkage gear 120 to rotate and quickly rotate the door body 920 until the set opening degree is reached, completing the door opening operation.

[0109] When performing the closing operation, the drive mechanism 100 is activated, the linkage gear 120 rotates in the opposite direction relative to the base 600, and the drive component 210 rotates in the opposite direction with the linkage gear 120 under the push of the first push part 1231, and pulls the door body 920 to deflect towards the box body 910 until the box body 910 is closed, thus completing the closing operation; during the process, the door-mounting mechanism 300 rotates with the linkage gear 120 until it resets.

[0110] See Figure 1In some embodiments, the door opening and closing device is further provided with a clutch device 400 for separable connection between the drive mechanism 100 and the revolving door mechanism 200 and the top door mechanism 300. This enables stable and smooth transmission of driving torque and allows for flexible disconnection from the drive mechanism 100, thus preventing interference with the drive mechanism 100 during manual door opening and closing operations. It also disconnects the drive mechanism 100 in case of device malfunction or environmental interference, ensuring the safety of the device structure and preventing mechanical damage. Of course, the clutch device 400 may not be provided; specific configuration is possible as needed and will not be detailed here.

[0111] See Figure 12 , Figure 13 and Figure 14 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.

[0112] 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.

[0113] See Figure 15 , Figure 16 and Figure 17 This embodiment also provides a refrigerator, which is the aforementioned electrical appliance. The refrigerator includes a cabinet 910 and a door 920, and the door 920 is rotatably mounted on the cabinet 910. A door opening and closing device is connected between the cabinet 910 and the door 920, which is used to push or pull the door 920 to deflect the door 920 relative to the cabinet 910, thereby realizing the door opening and closing operation.

[0114] See Figure 15 , Figure 16 and Figure 17 In some embodiments, the door opening and closing device has a base 600 fixed to the housing 910, and the top door component 320 or the top door-shaped component 380 points towards or abuts against the door body 920. The rotating door component 220 is hinged to the door body 920 via a hinge seat 230. In other embodiments, the base may be an integrated surface structure formed on the top of the housing 910, serving the function of a base. In still other embodiments, the base 600 may also be disposed on the door body 920, with the top door component 320 or the top door-shaped component 380 pointing towards or abutting against the housing 910, and the rotating door component 220 hinged to the housing 910 via a hinge seat 230.

[0115] See Figure 15 , Figure 16 and Figure 17 In some embodiments, the refrigerator may be provided with multiple doors 920, and each door 920 may be provided with an independent door opening and closing device to realize the automatic door opening and closing function of the multi-door refrigerator.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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, include: The top door mechanism and the rotary door mechanism are driven by the same drive mechanism; The revolving door mechanism includes a driving component, a return spring, and a revolving door component. The first end of the revolving door component is rotatably mounted on the door body, and the second end of the revolving door component is rotatably connected to the first end of the driving component. The second end of the driving component is rotatably mounted on the base. The drive mechanism includes a linkage gear, which can drive the drive component to rotate to drive the revolving door component to rotate the door body, and drive the door-pushing mechanism to push the door body. The linkage gear includes: The main body is rotatably mounted on the base; A first pushing part is provided on the main body, and the first pushing part is a door closing pushing part. When the main body rotates in the opposite direction, it pushes the driving member to rotate, and the driving member drives the door member to rotate, so as to close the door. The second push part is provided on the main body. The second push part is a door opening push part. When the main body rotates in the forward direction, it pushes the driving member to rotate, and the driving member drives the door member to rotate, so as to open the door. The first and second pushing parts have a space between them to accommodate the driving member. The driving member rotates at a first angle between the first and second pushing parts. The two ends of the return spring are respectively connected to the body and the driving member to maintain tension between the driving member and the first pushing part, forming a tendency to move closer to each other. This ensures that the driving member is initially positioned against the first pushing part and resists vibration from affecting the position and posture of the driving member.

2. The door opening and closing device as described in claim 1, characterized in that, The main body and the driving component are coaxially rotatably mounted on the base.

3. The door opening and closing device as described in claim 2, characterized in that, The linkage gear also includes a third pushing part, which drives the door-pushing mechanism to push the door body when the main body rotates in the forward direction.

4. The door opening and closing device as described in claim 3, characterized in that, The top door mechanism includes a first toothed portion, and the third pushing portion is provided with a second toothed portion that meshes and drives with the first toothed portion.

5. The door opening and closing device as described in claim 4, characterized in that, The first angle is less than or equal to the second angle, wherein the second angle is the angle of rotation of the linkage gear from the start of meshing between the first tooth and the second tooth to the separation of the first tooth and the second tooth.

6. The door opening and closing device as described in claim 5, characterized in that, The difference between the first angle and the second angle is less than or equal to 1 degree.

7. The door opening and closing device as described in claim 1, characterized in that, The main body is provided with a rotation limiting groove. The main body and the driving member are coaxially and rotatably disposed on the base. The driving member can rotate within the rotation limiting groove. 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.

8. The door opening and closing device as described in claim 1, characterized in that, The drive component and the revolving door component are rod-shaped.

9. The door opening and closing device as described in claim 1, characterized in that, The driving component and the linkage gear are coaxially and rotatably mounted on the base.

10. The door opening and closing device as claimed in claim 1, characterized in that, The base is provided with a third stop and a fourth stop. When the door is closed, the third stop stops the rotation of the linkage gear. When the door is opened to the limit position, the fourth stop stops the rotation of the linkage gear.

11. The door opening and closing device as claimed in claim 10, characterized in that, The rotation angle of the linkage gear between the third stop and the fourth stop is less than 130 degrees.

12. The door opening and closing device according to any one of claims 1-11, characterized in that, The door-mounting mechanism is rotatably mounted on the base. The door-mounting mechanism includes a first toothed portion that meshes with the linkage gear and a door-mounting portion for pushing the door body. The linkage gear drives the door-mounting mechanism to rotate relative to the base through the first toothed portion, thereby causing the door-mounting portion to push the door body.

13. The door opening and closing device as described in claim 12, characterized in that, The top door mechanism also includes: A limiting component is provided on the base, and the top door mechanism abuts against the limiting component when it rotates relative to the base to a preset angle; 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.

14. The door opening and closing device as described in claim 12, characterized in that, The top door mechanism is cam-shaped, with the first tooth and the top door portion located on the rim of the cam.

15. An electrical appliance, characterized in that, The device includes a housing, a door rotatably mounted on the housing, and a door opening and closing device as described in any one of claims 1 to 14, wherein the base is mounted on the housing.

16. The electrical equipment as described in claim 15, characterized in that, The electrical appliance is one of the following: refrigerator, disinfection cabinet, or dishwasher.

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