Door opening and closing devices and electrical equipment

Abstract

The present disclosure discloses a door opening and closing device including a drive mechanism (100), an interlocking gear (300), a clutch (200), and a door rotation mechanism (400), wherein the interlocking gear (300) is rotatably mounted on a base (900), the clutch (200) is mounted between the drive mechanism (100) and the interlocking gear (300) and serves to selectively rotatably connect the drive mechanism (100) and the interlocking gear (300), the door rotation mechanism (400) is connected at one end to the interlocking gear (300) and at the other end to a door body (13), and the door push-up mechanism (500) is connected to the interlocking gear (300) and serves to push up the door body (13). An electrical device including the door opening and closing device is also provided. The door opening and closing device can at least partially solve the technical problem of electrical devices, which have great difficulty in opening and closing doors and are inconvenient to use.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application filed on September 20, 2022, bearing application number 202211145488.8, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of electrical equipment, and more particularly to a door opening and closing device and an electrical equipment. [Background technology]

[0003] As living standards improve, electrical appliances such as refrigerators, dishwashers, and disinfection cabinets are becoming increasingly commonplace in people's lives. To maintain the sealing performance of these appliances, a suction mechanism is typically installed between the housing and the door of the appliance, maintaining negative pressure inside and outside to stably secure the door to the housing. While this improves the appliance's performance, it can make the door difficult to open. Generally, a relatively large force is required to pull the door, resulting in significant inconvenience during use. Summary of the Invention [Problem to be solved by the invention]

[0004] One or more embodiments of the present disclosure aim to provide a door opening / closing device and an electrical appliance that can solve, at least to some extent, the technical problem of electrical appliance doors being difficult to open and close, resulting in inconvenience during use. [Means for solving the problem]

[0005] One aspect of the present disclosure provides a door opening and closing device including: a drive mechanism, an interlocking gear rotatably mounted on a base, a clutch mounted between the drive mechanism and the interlocking gear for selectively rollingly connecting the drive mechanism and the interlocking gear, a door rotation mechanism having one end connected to the interlocking gear and the other end connected to a door body, and a door push-up mechanism connected to the interlocking gear for pushing up the door body, wherein the clutch rolls between the drive mechanism and the interlocking gear, and the drive means drives the interlocking gear to rotate, the interlocking gear is interlocked with the door push-up mechanism to push up the door body, and the door rotation mechanism is interlocked with the door body to continue opening.

[0006] Another aspect of the present disclosure provides an electrical device that includes a door body, a box body, and a door opening / closing device, and when the clutch establishes a state in which the interlocking gear and the drive mechanism are connected by rolling, the drive mechanism drives the interlocking gear to rotate, pushes up the door body using the door push-up mechanism, and then interlocks with the door rotation mechanism to rotate the door body.

[0007] In order to clearly explain the technical solutions according to one or more embodiments of the present disclosure, the drawings necessary for explaining the embodiments will be briefly described below. It should be apparent that the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive work. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram illustrating a configuration of a door opening and closing device according to an embodiment of the present disclosure. [Figure 2] 2 is a schematic diagram showing the configuration of the door opening and closing device in FIG. 1 in a state where the door is open. FIG. [Figure 3] 2 is a schematic diagram showing an assembled configuration of a clutch of the door opening and closing device in FIG. 1. FIG. [Figure 4]FIG. 4 is an exploded view showing a first configuration of the clutch in FIG. 3. [Figure 5] FIG. 4 is an exploded view showing a second configuration of the clutch in FIG. 3. [Figure 6] 6 is an exploded view of the clutch in FIG. 5 as seen from another angle. [Figure 7] 4 is a schematic diagram showing the configuration of a first rolling member of the clutch in FIG. 3. FIG. [Figure 8] 4 is a schematic diagram showing the configuration of a second rolling member of the clutch in FIG. 3. FIG. [Figure 9] 4 is a schematic diagram showing the configuration of a rolling connection member of the clutch in FIG. 3. FIG. [Figure 10] 4 is a schematic diagram showing the configuration of a push-up cover of a clutch disengagement push-up member in FIG. 3. FIG. [Figure 11] 4 is a schematic diagram showing the configuration of a push rod of a clutch disengagement push-up member in FIG. 3. [Figure 12] 4 is a schematic diagram showing an assembled configuration of a clutch disengagement thrust-up member in FIG. 3. [Figure 13] FIG. 4 is a schematic diagram showing the assembly of a thrust-up cover of the clutch in FIG. 3. [Figure 14] 4 is a schematic diagram showing the configuration of a rotation prevention mechanism for the clutch in FIG. 3. FIG. [Figure 15] 2 is a schematic diagram showing a first configuration of a door push-up mechanism of the door opening and closing device in FIG. 1. FIG. [Figure 16] 3 is a schematic diagram showing a second configuration of the door push-up mechanism of the door opening and closing device in FIG. 2. FIG. [Figure 17] 2 is a schematic diagram showing the configuration of a levitation mechanism of the door opening and closing device in FIG. 1. FIG. [Figure 18] 18 is a schematic diagram showing the configuration of an interlocking gear of the door opening and closing device in FIG. 17. FIG. [Figure 19] FIG. 18 is a schematic diagram showing a combination of a levitation unit and a push-up unit of the door opening and closing device in FIG. 17. [Figure 20] 18 is a schematic diagram showing the configuration of a levitation position limiting slide groove of the door opening and closing device in FIG. 17. FIG. [Figure 21]18 is a schematic diagram showing a combination of a levitation portion and a levitation position limiting slide groove of the door opening and closing device in FIG. 17. FIG. [Figure 22] 18 is a schematic diagram showing the configuration of the door push-up mechanism of the door opening and closing device in FIG. 17 in an initial state. FIG. [Figure 23] 18 is a schematic diagram showing the configuration of the door push-up mechanism of the door opening and closing device in FIG. 17 in a pushed-up state. FIG. [Figure 24] 18 is a schematic diagram showing the configuration of the door push-up mechanism of the door opening and closing device in FIG. 17 in a levitated state. FIG. [Figure 25] 1. FIG. 4 is a schematic diagram showing the configuration of another door push-up mechanism of the door opening and closing device in FIG. 1 in an initial state. [Figure 26] 26 is a schematic diagram showing the configuration of another door push-up mechanism of the door opening and closing device in FIG. 25 in a pushed-up state. FIG. [Figure 27] 26 is a schematic diagram showing the configuration of another door push-up mechanism of the door opening and closing device in FIG. 25 in a levitating state. FIG. [Figure 28] 1. FIG. 4 is a schematic diagram showing a levitation configuration of another levitation mechanism of the door opening and closing device in FIG. [Figure 29] FIG. 29 is a schematic diagram showing the configuration of a position limiting mechanism for another levitation mechanism of the door opening and closing device in FIG. 28. [Figure 30] 29 is a schematic diagram showing the configuration of another levitation mechanism of the door opening and closing device in FIG. 28 in an initial state. FIG. [Figure 31] 29 is a schematic diagram showing the configuration of another levitation mechanism of the door opening and closing device in FIG. 28 in a door pushing-up state. FIG. [Figure 32] 29 is a schematic diagram showing the configuration of another levitation mechanism of the door opening and closing device in FIG. 28 in a levitating state. FIG. [Figure 33] FIG. 29 is a schematic diagram showing the configuration of an interlocking gear of another levitation mechanism of the door opening and closing device in FIG. 28. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following clearly and completely describes the technical solutions according to the embodiments of the present disclosure with reference to the drawings. It is clear that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. Based on the embodiments of the present disclosure, any other embodiments obtained by a person skilled in the art without any inventive work are all included in the scope of protection of the present disclosure.

[0010] Additionally, although this disclosure may repeatedly refer to reference numerals and / or letters in different examples, this repeated reference is for the purposes of simplicity and clarity and does not imply a relationship between the various embodiments and / or installations being discussed. Additionally, while this disclosure provides examples illustrating specific processes and materials, one skilled in the art will recognize that other processes and / or materials may be used.

[0011] Hereinafter, the technical solution of the present disclosure will be described based on specific embodiments with reference to the drawings.

[0012] As shown in Figures 1 and 2, one or more embodiments of the present disclosure provide a door opening / closing device that is attached to a housing 12 of an electrical device and connected to a door 13 of the electrical device. The door opening / closing device drives the door 13 to deflect the door 13 relative to the housing 12, thereby opening and closing the housing 12 and improving operational convenience. The door opening / closing device also maintains the door 13 in a predetermined position when the door 13 reaches that position, thereby facilitating the removal or storage of items in the housing 12, improving user comfort, and reducing the safety risk of people colliding with the door when it deflects or closes.

[0013] A door opening / closing device according to one or more embodiments of the present disclosure is primarily applied to electrical equipment and is intended to automatically open and close a door 13. The door opening / closing device can automatically open the door 13 when it receives a signal to open the door. In some embodiments, the signal to open the door may be triggered by a user or by the electrical equipment itself. In other embodiments, the door opening / closing device can automatically close the door 13 when it receives a signal to close the door. The signal to close the door may be triggered by a user or by the electrical equipment itself.

[0014] In one or more embodiments of the present disclosure, the door opening / closing device includes a drive mechanism 100, a clutch 200, an interlocking gear 300, a door rotation mechanism 400, and a door thrust mechanism 500. The drive mechanism 100 sequentially drives the clutch 200 and the interlocking gear 300 to interlock the door rotation mechanism 400 and the door thrust mechanism 500, thereby achieving door thrust operations and door rotation operations, thereby realizing the door opening and closing process. In some embodiments, the clutch 200 selectively disconnects or connects the rolling mechanism between the drive mechanism 100 and the interlocking gear 300, thereby realizing rolling control between the drive mechanism 100 and the downstream door opening / closing mechanism consisting of the interlocking gear 300, the door rotation mechanism 400, and the door thrust mechanism 500, thereby flexibly switching between automatic opening and closing of the door and manual operation. This alleviates the problem of interference between the door opening and closing device when the door is manually opened and closed, and improves convenience, smoothness, and safety of use.

[0015] In some embodiments, the base 900 is installed as a main body for receiving the door opening / closing device, and receives and houses each of the above-mentioned functional components, so that the entire device can be attached to an electrical appliance such as a one-door refrigerator or a two-door refrigerator, and has excellent expandability and replacement capabilities. It should be noted that the base 900 may be provided with an upper cover or other housing structure having a covering or limiting range to protect each of the above-mentioned functional components therein.

[0016] Specifically, the drive mechanism 100 and the clutch 200 are fixed to a base 900, and the interlocking gear 300 is rotatably installed on the base 900 as a rolling member that connects the upstream member and the downstream member. By establishing a rolling connection relationship between the clutch 200 and the drive mechanism 100 that allows controllable on / off operation, the rolling connection between the interlocking gear 300 and the drive mechanism 100 can be flexibly disconnected or maintained according to set rules and modes.

[0017] The door push-up mechanism 500 is connected to the interlocking gear 300, and therefore when the interlocking gear 300 is rotating, the door push-up mechanism 500 operates in conjunction with the interlocking gear 300 to push up or reset the door body 13. By pushing up the door body 13 with the door push-up mechanism 500, it can act directly on the door body 13, overcoming resistance to opening the door, such as the adhesive force between the door body 13 and the box body 12, making it easier to open the door. Once the door push-up mechanism 500 has pushed up the door body 13 by a certain angle relative to the box body 12, the door rotation mechanism 400 continues to rotate the door body 13, allowing the door body 13 to rotate and open to a larger opening angle, making it easier to put in and take out items.

[0018] The door rotation mechanism 400 is connected to the interlocking gear 300 and is movably connected to the door body 13, so that when the interlocking gear 300 rotates, the door rotation mechanism 400 operates together with the interlocking gear 300, causing the door body 13 to rotate, thereby realizing the operation of opening and closing the door.

[0019] In some embodiments, the position and configuration of the drive can be configured to synchronize the operation of the door lifting mechanism 500 and the door rotation mechanism 400. When the door is opened, the drive mechanism 100 establishes and maintains a rolling connection with the interlocking gear 300 via the clutch 200, driving the interlocking gear 300 to rotate in the forward direction. When the door lifting mechanism 500 lifts the door body 13 to a certain angle, the door rotation mechanism 400 rotates the door body 13 to a predetermined opening position via a relay. This creates a relay door opening mode with a large force and a small angle for door lifting, and a small force and a large angle for door rotation, making the door opening easier and more convenient. When the door is closed, the gear 300 rotates in the opposite direction. The door rotation mechanism 400 is interlocked with the door body 13 so as to rotate, gradually reducing the distance between the door body 13 and the box body 12 until the door body 13 is closed on the box body 12, and at that time, the door push-up mechanism 500 is reset by interlocking with the interlocking gear 300, and prepares for the next operation of opening the door.

[0020] In other words, the operation sequence means that the door push-up mechanism 500 pushes the door 13 up by a relatively small angle with a relatively large force, and then the door rotation mechanism 400 rotates the door 13 by a relatively large angle. Designing the operation sequence as described above reduces the difficulty of opening the door and increases the convenience of opening the door. At the same time, the strength requirements for the door rotation mechanism 400 can be reduced to a certain extent in the entire structure and in certain areas. Designing the operation sequence as described above effectively protects the stability of the door rotation mechanism 400 and avoids the effect of a relatively large reaction force being applied to the door rotation mechanism 400 when the door rotation mechanism 400 alone overcomes the resistance to opening the door. Consequently, the rational design of the operation sequence ensures the stability of the entire structure and its function.

[0021] It should be noted that the door rotation mechanism 400 and the door push-up mechanism 500 do not need to be arranged in a time-series order in their operations.

[0022] Meanwhile, the clutch 200 can flexibly establish and cut the rolling connection between the drive mechanism 100 and the interlocking gear 300, so that the rolling connection can be quickly cut when the door is fully opened, and as a result, the door body 13 will not collide with the drive mechanism 100 as it continues to open, close, or rotate, making it easier to open and close the door manually. Similarly, when the door body 13 is fully closed, the rolling connection can be quickly cut, so that the door can be opened and closed manually.

[0023] To summarize the above, in one or more embodiments of the present disclosure, the drive mechanism 100 drives the door thrust mechanism 500 and the door rotation mechanism 400 via the clutch 200 and the interlocking gear 300, and both the door thrust mechanism 500 and the door rotation mechanism 400 are driven simultaneously by a single drive mechanism 100, thereby simplifying the overall structural size of the door opening and closing device. Furthermore, by controlling the operation of the clutch 200, the rolling connection between the interlocking gear 300 and the drive mechanism 100 is controlled intermittently, which reduces interference with the drive mechanism 100 when the door is manually opened or closed, reduces the risk of damage to the door opening and closing device, and ensures the stability and reliability of the structure of the door opening and closing device. By separating and combining the functions of the door lifting mechanism 500 and the door rotation mechanism 400, a relay door opening mode is realized, consisting of a door lifting operation that requires a large force and a small angle, and a door rotation operation that requires a small force and a large range, which reduces the difficulty of opening the door to a certain extent, increases the stability of the door opening and closing device configuration, and ensures convenience and comfort in door opening and closing operations.

[0024] Each of the above functional configurations will be specifically described below.

[0025] 3, 4, 5 and 6, in some embodiments, the clutch 200 may include a first rolling member 210 and a second rolling member 220 that are separably connected. The first rolling member 210 and the second rolling member 220 are intended to be connected to the interlocking gear 300, which is the drive mechanism 100 and the door opening / closing execution mechanism in the door opening and closing device, and the door push-up mechanism 500 and the door rotation mechanism 400 that are coupled thereto, respectively.

[0026] The engagement and disengagement of the first rolling member 210 and the second rolling member 220 realizes the connection and disengagement of the drive mechanism 100 and the interlocking gear 300, and makes it possible to control the connection and disengagement state of the drive mechanism 100 and the door body 13. When the door body 13 is manually operated by operating the clutch 200, the risk of interference between the drive mechanism 100 and the automatic door opening / closing body is reduced, and the convenience and safety of operation can be improved.

[0027] To achieve the separable connection between the first rolling member 210 and the second rolling member 220, the clutch 200 may include a rolling connection member 230 and a disengagement push-up member 240 associated therewith. In some embodiments, the rolling connection member 230 may be connected to the second rolling member 220. The disengagement push-up member 240 presses the rolling connection member 230 to connect or disconnect the rolling connection member 230 and the first rolling member 210, thereby achieving the connection and disconnection between the first rolling member 210 and the second rolling member 220.

[0028] The rolling connection member 230, which serves as a connecting member between the first rolling member 210 and the second rolling member 220, is itself movable relative to the first rolling member 210. By moving the push-up rolling connection member 230, the connection relationship between the rolling connection member 230 and the first rolling member 210 can be established or released, thereby realizing the connection and separation between the first rolling member 210 and the second rolling member 230. The disengagement push-up member 240 is used to perform a push-up operation on the rolling connection member 230.

[0029] 4, 5 and 12, in some embodiments, the disengageable push-up member 240 may include a push-up cover 241 and a push rod 242. The push-up cover 241 is connected to the rolling connecting member 230, and the push rod 242 is used to push the push-up cover 241, thereby allowing the rolling connecting member 230 to smoothly connect and disconnect with the first rolling member 210.

[0030] 9 , in some embodiments, the rolling connecting member 230 may include a connecting end 231 and a push-up end 232. The push-up end 232 is coupled to a push-up cover 241. When the pushing-up cover 241 is pressed to move the rolling connecting member 230, the connecting end 231 is separably connected to the first rolling member 210, and the first rolling member 210 and the second rolling member 220 can be connected or disconnected together.

[0031] In some embodiments, the rolling connecting member 230 and the second rolling member 220 may be integrally installed, or the rolling connecting member 230 may be fixed to the second rolling member 220. The rolling connecting member 230 and the second rolling member 220 move as a whole to connect and disconnect with the first rolling member 210, which simplifies the processing and assembly operations for forming the members.

[0032] In some embodiments, the connecting end 231 is movably mounted on the second rolling member 220, so that the connecting end 231 can simultaneously move relative to the first rolling member 210 and the second rolling member 220. The first rolling member 210 and the second rolling member 220 are in a relatively stable position and posture, and movement in non-rolling operating directions is minimized, so that the first rolling member 210 and the second rolling member 220 can be stably connected to the upstream and downstream devices and the operating state can be maintained stably.

[0033] 6 and 7, in some embodiments, the first rolling member 210 is provided with an engagement groove 211, which can match the connecting end 231 to engage and fix it, and can also smoothly realize the operation of the connecting end 231 disengaging from the engagement groove 211, ensuring stability and reliability of the engagement and disengagement operation.

[0034] 7, in some embodiments, the first rolling member 210 may be configured as a first rolling gear 212. The driving force is transmitted in a rolling manner by meshing the gears. Considering the operating mode in which the gears rotate around their axes, the engagement groove 211 may be configured on the axial end surface of the first rolling gear 212. This can conveniently establish a connected state and a disconnected state between the connecting end 231 and the first rolling gear 212, and can reduce the influence of the rotation and the meshing operation of the teeth.

[0035] It should be noted that, in order to match the operating mode of the first rolling gear 212, the motion mode of the second rolling member 220 may be set to be similar to the rotation mode of the first rolling gear 212 around its axis, so that synchronous rotation or rolling can be realized.

[0036] 8, in some embodiments, the second rolling member 220 may be installed as a second rolling gear 222, and the first rolling gear 212 and the second rolling gear 222 may be configured to rotate coaxially. The connecting end 231 may be installed on the gear 222, and the pushing-up end 232 may be pushed up, so that the connecting end 231 can be connected to the first rolling gear 212, and the first rolling gear 212 and the second rolling gear 222 may be connected and rotate synchronously, and a path for transmitting the connected driving force may be established.

[0037] 4, 5, 13 and 14, in some embodiments, to realize the rotation needs of the first rolling gear 212 and the second rolling gear 222, a rotation axis structure may be installed on the base 900 to guide the assembly and rotation of the first rolling gear 212 and the second rolling gear 222. Specifically, a common rotation axis 920 may be installed on the base 900. As a result, the first rolling gear 212 and the second rolling gear 222 are axially mounted around the common rotation axis 920, which ensures stable rotation of the gears.

[0038] In some embodiments, the common rotation axis 920 may be installed on an axis with a varying cross section. A support post 921 and a rotation axis post 922 are arranged in this order from the base 900 upward. The diameter of the support post 921 is larger than the diameter of the shaft hole provided in the second rolling gear 222. The diameter of the rotation axis post 922 may match the diameter of the shaft hole in the second rolling gear 222. By placing the second rolling gear 222 on the support post 921 and then surrounding it on the rotation axis post 922, the second rolling gear 222 is spaced a certain height from the base 900, ensuring stable rotation. The first rolling gear 212 is arranged overlapping the second rolling gear 222 and is also surrounding it on the rotation axis post 922, enabling rotation.

[0039] In some embodiments, the connecting end 231 may be fixed to an axial end surface of the second rolling gear 222. By pushing the pushing end 232, the second rolling gear 222 as a whole can be pushed toward or away from the first rolling gear 212, so that the connecting end 231 can be fitted into or disengaged from the engagement groove 211. The overall operation is simple, the formation of components is relatively simple, and the assembly operation is simple and efficient.

[0040] 8, in some embodiments, an engagement hole 221 may be provided in the second rolling gear 222, and the connection end 231 may be movably fitted into the engagement hole 221. The push-up end 232 is pushed, and the connection end 231 moves toward the first rolling gear 212 relative to the engagement hole 221, and thus engages with the engagement groove 211, thereby establishing a connection between the first rolling gear 212 and the second rolling gear 222.

[0041] When the connecting end 231 is separated from the engaging groove 211, the connecting end 231 also moves relative to the engaging hole 221. During this process, the movement of the rolling connecting member 230 has a relatively small effect on the positions and postures of the first rolling gear 212 and the second rolling gear 222, and the rotating positions and postures thereof can be conveniently maintained, which helps to maintain the operating state and reliability of the device.

[0042] In some embodiments, the engaging groove 211 may be arranged to axially penetrate the through-hole of the first rolling gear 212. This prevents the connecting end 231 from directly pushing up against the bottom of the engaging groove 211, which would cause unnecessary disturbance, and can maintain stability during the rotation of the first rolling gear 212.

[0043] In some embodiments, considering that the first rolling gear 212 and the second rolling gear 222 rotate and move, the connecting end 231 may be configured as a plurality of connecting arms 2311 to improve the efficiency of engaging the connecting end 231 with the engaging groove 211. In addition, the number of engaging grooves 211 may be the same as or greater than the number of connecting arms 2311, which reduces the difficulty of engaging the connecting arms 2311 with the engaging groove 211.

[0044] It should be noted that the rotation trajectory of the engaging groove 211 must intersect with the movement trajectory of the connecting arm 2311 so that the connecting arm 2311 can be fitted into the engaging groove 211.

[0045] In some embodiments, the distance from the connecting arm 2311 to the axis of the rotation shaft of the second rolling gear 222 must be the same as the distance from the engagement groove 211 to the axis of the rotation shaft of the first rolling gear 212. This allows the engagement groove 211 and the connecting arm 2311 to stably engage and disengage in the axial direction. The thrust force on the thrust end 231 is in the axial direction of the rotation shaft of the second rolling gear 222. The processing and assembly can both be based on the axis of the rotation shaft, making the installation, assembly, and thrusting operations of the engagement / disengagement thrust member 240 convenient.

[0046] It should be noted that the distance from the connecting arm 2311 to the axis of the rotation shaft of the second rolling gear 222 does not have to be the same as the distance from the engaging groove 211 to the axis of the rotation shaft of the first rolling gear 212. It is sufficient to ensure that the rotation locus of the engaging groove 211 and the movement locus of the connecting arm 2311 always intersect. Moreover, when there are multiple connecting arms 2311 and multiple engaging grooves 211, it is possible to avoid unstable insertion by rationally setting the spacing between the multiple connecting arms 2311 and the spacing between the multiple engaging grooves 211.

[0047] In some embodiments, multiple connecting arms 2311 are arranged at equal intervals on a circular track. Correspondingly, multiple engagement grooves 211 may be arranged at equal intervals on the circular track, which can form a well-matched positioning and spacing mode for convenient engagement and insertion.

[0048] It should be noted that the number of engaging grooves 211 may be appropriately increased to increase the efficiency of matching and fitting between the connecting arms 2311 and the engaging grooves 211. By providing the number of engaging grooves 211 at an integer multiple of the number of connecting arms 2311, the efficiency of matching and fitting between the connecting arms 2311 and the engaging grooves 211 can be significantly increased even when the engaging grooves 211 and the connecting arms 2311 are arranged at equal intervals.

[0049] In some embodiments, multiple connecting arms 2311 may be arranged on multiple circular tracks, and the first rolling gear 212 needs to be provided with an appropriate number of engaging grooves 211 according to the circular tracks, which can ensure stable engagement.

[0050] In some embodiments, the thrust end 232 of the rolling connection member 230 may be directly connected to the thrust cover 241. Considering that the thrust direction is perpendicular to the rotation direction of the second rolling gear 222 and the first rolling gear 212, the rolling connection member 230 may be installed in a manner that rotates around the rotation axis of the second rolling gear 222. Installing the thrust end 232 rotatably on the thrust cover 241 allows the rolling connection member 230 to simultaneously consider the operating states of rotation and axial movement.

[0051] Specifically, the pushing end 232 of the rolling connection member 230 includes an annular seat 2321, and the annular seat 2321 is rotatably connected to the pushing cover 241, enabling the rolling connection member 230 to realize operating states of rotation and axial movement. Meanwhile, the pushing cover 241 only needs to push up the annular seat 2321 in the axial direction, eliminating the need to consider its rotation state. This allows for a significant reduction in the installation and mounting arrangement of the components for the connecting / disconnecting pushing member 240.

[0052] It should be noted that in order to reduce interference between the first rolling gear 212 and the second rolling gear 222 caused by the movement of the rolling connecting member 230, the annular seat 2321 may be located on one side of the second rolling gear 222 away from the first rolling gear 212, and the connecting arm 2311 may axially pass through the second rolling gear 222. This allows it to move further and fit into the engagement groove 211, and therefore the movement of the thrust annular seat 2321 does not extend to the space between the two rolling gears, maintaining relative stability between them.

[0053] 10 , in some embodiments, the push-up cover 241 is the pushing medium. A shaft sleeve 2412 and a push-up part 2411 may be installed on the push-up cover 241. The annular seat 2321 may be connected to cover the shaft sleeve 2412, so that the annular seat 2321 can be rotatable. Correspondingly, the push-up part 2411 receives a pushing force from the push rod 242, and moves the push-up cover 241 as a whole in the axial direction of the rotation axis of the first rolling gear 212, thereby realizing the pushing operation of the rolling connection member 230.

[0054] In some embodiments, the movement direction of the push-up cover 241 is the axial direction of the rotation axis of the second rolling gear 222. For ease of explanation, the movement direction of the push-up cover 241 is defined as the first direction. In order to reduce the overall thickness of the device and the difficulty of formation and assembly, the push-up cover 241 may be pushed in a different direction. That is, the push rod 242 may be pushed in an angled direction rather than in the first direction, thereby reducing the need to occupy space in the first direction.

[0055] 10, 11, and 12, specifically, a first push-up surface 2413 is provided on the push-up portion 2411, and a second push-up surface 2421 is provided on the push rod 242, so that the first push-up surface 2413 and the second push-up surface 2421 are in contact with each other and can slide relative to each other. The first push-up surface 2413 is provided at an acute angle to the first direction. By pushing up the first push-up surface 2413, the push-up cover 241 can be pushed up in the first direction, and thus the rolling connection member 230 can be pressed against the first rolling gear 222.

[0056] In some embodiments, in order to optimize the efficiency of the thrusting operation, the angle between the first thrusting surface 2413 and the first direction may be set in the range of 30 degrees to 60 degrees, for example, 30 degrees, 45 degrees, or 60 degrees.

[0057] In some embodiments, the angle between the pushing direction of the push rod 242 and the first direction may be controlled to be 90 degrees, which minimizes the space required for the combination of the push rod 242 and the rolling connecting member 230, thereby reducing the overall volume of the device.

[0058] 11 and 12, in some embodiments, the number of first thrust surfaces 2413 may be set to only two in order to balance the force received by the push-up cover 241. Correspondingly, the push rod 242 may be set to have two pushing arms 2422, which correspondingly push up the two first thrust surfaces 2413. Applying force at two points ensures uniformity of the force received by the push-up cover. Moreover, by connecting the two pushing arms 2422 to the same connecting part 2423, the operations are synchronized and the magnitude of the applied forces is ensured to be consistent, thereby ensuring uniformity of the force received by the push-up cover 241. Correspondingly, a second thrust surface 2421 is provided on each of the two pushing arms 2422.

[0059] In some embodiments, two first push-up surfaces 2413 may be installed on opposite sides of the push-up cover 241, two push arms 2422 may be installed side by side, and the second push-up surface 2421 may be installed at the end of the push arm 2422 away from the connection part 2423. The push-up connection part 2423 may be used to realize the push-up operation.

[0060] In some embodiments, depending on the specifications of the push-up cover 241, the first push-up surface 2413, the second push-up surface 2421 and the push arm 2422 may be provided in two or more numbers.

[0061] 4 and 5, a linear driving means 243 may be connected to the push rod 242 to perform the pushing operation of the push rod 242. The push rod 242 is pushed up or reset along the second direction. The linear driving means pushes the target pushing cover 241 to move along the first direction. When the linear driving means 243 is reset, the push rod 242 opens the pushing cover 241.

[0062] In some embodiments, the linear drive means 243 may employ a linear drive member such as an electromagnetic push rod, a ball screw, or the like.

[0063] In some embodiments, the driving means may be configured as a reduction motor or a motor equipped with a reduction gearbox, which can reasonably control the output torque and rotation speed.

[0064] Referring to FIG. 14, in some embodiments, bumpers 244 may be installed between the base 900 and the push rod 242 and between the push-up cover 241 and the base 900 to reduce collisions and vibrations between the push rod 242 and the base 900 and between the base 900 and the push-up cover 241.

[0065] In some embodiments, the push-up cover 241 is subject to axial friction in the annular seat 2321, which tends to cause it to rotate in the circumferential direction, which can easily affect its combination with the disengagement push-up member 240. To prevent the stop push-up cover 241 from rotating in the circumferential direction, an anti-rotation mechanism 930 is provided on the base 900 and fitted into the push-up cover 241 in a first direction.

[0066] 10, 14, and 15, in some embodiments, the anti-rotation mechanism 930 includes an anti-rotation rib 931 that is slidable relative to the push-up cover 241 in a first direction. This can prevent the push-up cover 241 from rotating in the circumferential direction and sliding in the first direction at the same time. Generally, the push-up cover 241 may be provided with an anti-rotation engagement groove 2414. The anti-rotation engagement groove 2414 is combined with the anti-rotation rib 931 so that the two slide relative to each other in the first direction.

[0067] In some embodiments, the number of combinations formed by the anti-rotation ribs 931 and the anti-rotation engagement grooves 2414 may be multiple. At the same time, the multiple anti-rotation ribs 931 may be arranged at unequal intervals so that the push-up cover 241 and the anti-rotation ribs 931 can be assembled in a unique position. Even during assembly, the first push-up surface 2413 and the second push-up surface 2421 are stably and reliably held in corresponding positions, preventing misalignment during assembly and effectively realizing a mistake-proofing effect by the machine.

[0068] In some embodiments, a convex cylindrical portion may be provided on the base 900, an anti-rotation rib 931 may be provided on the outer wall of the cylindrical portion, and a push-up cover 241 may be provided on the outside of the cylindrical portion, which may provide positioning and guidance. Specifically, the cylindrical portion and the common rotation axis 920 may be coaxially provided.

[0069] 4, 5 and 6, in some embodiments, a separating member 250 may be provided to ensure a quick and effective response when the connection between the connecting end 231 and the first rolling member 210 is released. When a force is applied to the rolling connecting member 230 to separate it from the first rolling member 210 and the push rod 242 is reset, a sufficient movement space is provided so that the rolling connecting member 230 can be separated from the first rolling member 210 by the separating member 250.

[0070] In some embodiments, the separating member 250 may be connected to the rolling connecting member 230 and the second rolling member 220, respectively. The pushing end 232 is pushed to move relative to the second rolling member 220, thereby facilitating the connection and disconnection of the first rolling member 210 and the connecting end 231.

[0071] To enhance the response time, the separating member 250 may be configured as an elastic reset member 253 to continuously apply a force urging the rolling connection member 230 to separate from the first rolling member 210. While the force of the elastic reset member 253 still exists during the process in which the push rod 242 presses the push-up cover 241 and the rolling connection member 230 to connect with the first rolling member 210 and maintain the parallel connection, the force of the elastic reset member 253 is eliminated because it is limited to the mechanical movement of the push rod 242, the push-up cover 241, and the rolling connection member 210. As the push rod 242 changes its pressing force on the push-up cover 241 and the push-up cover 241 resets and moves backward, the push-up cover 241 gradually reduces its pushing force. The force of the elastic reset member 253 pushes the connecting end 231 of the rolling connection member 230 to separate from the first rolling member 210, providing an excellent response time.

[0072] In some embodiments, the elastic reset portion 253 may be a spring, which is disposed between the push-up end 232 and the second rolling member 220 to continuously apply an elastic force to disengage the rolling connection member 230 from the first rolling member 210.

[0073] In some embodiments, the separation members 250 are coupled to the second rolling member 220 and the base 900, respectively, and guide the rolling connection member 230 to move relative to the base 900. As a result, the connection end 231 of the rolling connection member 230 is released from the connection relationship with the first rolling member 210.

[0074] In some embodiments, the separating member 250 may be configured as two magnetic separating parts, a first separating part 251 and a second separating part 252. The magnetic attractive and repulsive forces between the first separating part 251 and the second separating part 252 cause the rolling connecting member 230 to move relative to the base 900, thereby cutting the connection between the rolling connecting member 230 and the first rolling member 210.

[0075] One of the first separating part 251 and the second separating part 252 is mounted on the base 900, and the other is mounted on the connecting member 230. The first separating part 251 and the second separating part 252 have a magnetic attraction force to each other, which causes the base 900 and the rolling connecting member 230 to tend to approach each other, and continuously provides an acting force to separate the rolling connecting member 230 from the first rolling member 210.

[0076] In the arrangement shown in FIG. 4, that is, when the first rolling member 210, the second rolling member 220, the rolling connecting member 230 and the base 900 are stacked in order, the first separating part 251 and the second separating part 252 are connected to the rolling connecting member 230 and the base 900, respectively, and a continuous magnetic attraction force is maintained between them, pulling the rolling connecting member 230 to the base 900.

[0077] In some other embodiments, one of the first separation portion 251 and the second separation portion 252 may be installed on the rolling connection member 230, and the other may be installed on the first rolling member 210 or the second rolling member 220. The first separation portion 251 and the second separation portion 252 have a magnetic repulsive force to each other, and by maintaining the magnetic repulsive force, the rolling connection member 230 and the first rolling member 210 or the second rolling member 220 maintain a tendency to move away from each other, and continuously provide an acting force to separate the rolling connection member 230 from the first rolling member 210.

[0078] In the arrangement shown in FIG. 4, that is, when the first rolling member 210, the second rolling member 220, the rolling connecting member 230 and the base 900 are stacked in order, one of the first separating part 251 and the second separating part 252 is installed on the rolling connecting member 230, and the other is installed on the first rolling member 210 or the second rolling member 220, or on the outer upper cover, and a magnetic repulsive force is maintained between them, thereby pushing the rolling connecting member 230 up to the base 900.

[0079] In some embodiments, the first separating portion 251 and the second separating portion 252 may be configured as a magnetically attracting metal portion and a magnetic body, which continuously forms a separating force.

[0080] Referring to Figures 4, 5, 6 and 14, in some embodiments, a stop member 260 can stop the first rolling gear 212 and the second rolling gear 222 on the common rotation axis 920 and limit separation between them in the axial direction, ensuring stability and reliability of the rolling configuration.

[0081] The stop member 260 may be configured as a connecting portion 261 and a stop portion 263. The connecting portion 261 may have one end connected to the base 900 or a structure on its surface, for example, connected to the common rotation axis 920. The first rolling member 210 and the second rolling member 220 are configured at the connecting portion 261. Next, the stop portion 263 is fixed to the other end of the connecting portion 261 to prevent the first rolling member 210 and the second rolling member 220 from separating from the connecting portion 261, thereby ensuring the stability of the separation rolling configuration.

[0082] In some embodiments, the connecting portion 261 and the stopper portion 263 may be integrated and installed as a headed bolt. The head of the bolt may serve as the stopper portion 263, or an independent stopper portion 263 may be set and encased on a round bar, and the head of the bolt may limit the removal of the stopper portion 263.

[0083] In some embodiments, a stopper through-hole 923 may be provided at the tip of the common rotating shaft 920 in the axial direction of the common rotating shaft 920. The through-hole 923 is used in combination with a headed bolt to lock the first rolling member 210 and the second rolling member 220 together.

[0084] In some embodiments, the main body of the link of the headed bolt may be configured as a smooth peripheral surface, and the inner wall surface of the stopper through-hole 923 may be configured as a smooth inner peripheral surface. This allows for a low-friction match between the two, preventing any influence on the rolling operation of the first rolling member 210 and the second rolling member 220. A locking portion 262 is installed at the other end of the stopper through-hole to lock the headed bolt. The locking portion 262 may be a bolt or a nut.

[0085] In some embodiments, the connecting portion 261 may be installed on the connecting shaft 2611. One end of the connecting shaft 2611 is fixed to the base 900. The first rolling member 210, the second rolling member 220, and the push-up cover 241 are circumferentially installed on the connecting shaft 2611, thereby restricting radial separation of the connecting shaft 2611. The stopper 263 may be installed as a baffle plate 2631. The baffle plate 2631 is fixedly installed on the other end of the connecting shaft 2611, thereby realizing axial position restriction of the connecting shaft 2611 and preventing the first rolling member 210, the second rolling member 220, and the push-up cover 241 from separating in the axial direction.

[0086] In some embodiments, the baffle plate 2631 may be integrally formed on the connecting shaft 2611 .

[0087] In some embodiments, the baffle plate 2631 is removably fixed to the connecting shaft 2611, for example, by an engagement hole or an engagement groove provided in the baffle plate 2631, the neck portion of the head at one end of the connecting shaft 2611 may engage with a narrow groove, or a similar engagement form.

[0088] In some embodiments, the baffle plate 2631 may be further fixed to the connecting shaft 2611 by a locking portion (for example, a bolt) connected to a head portion at one end of the connecting shaft 2611 .

[0089] When performing engagement / disengagement control, the linear driving means 243 operates to push the push rod 242 toward the push-up cover 241, and the second push-up surface 2421 at the head end of the push rod 242 pushes up the first push-up surface 2413, thereby realizing movement of the push-up cover 241 in the first direction, and the connecting end 231 pushes up toward the first rolling gear 212 until it fits into the engagement groove 211, thereby connecting the first rolling gear 212 and the second rolling gear 222 together. At this time, the linear driving means 243 stops at the previous position, and the push rod 242 supports the push-up cover 241 against the bottom 900, and then supports the rolling connecting member 230, maintaining the first rolling member 210 and the second rolling member 220 in a rolling connected state. When the connection needs to be cut off as required, the linear driving means 243 is reset, and the connecting end 231 of the rolling connecting member 230 gradually disengages from the engaging groove 211 due to the action of the separating member 250, until the connection between the first rolling gear 212 and the second rolling gear 222 is cut off and the power transmission path is interrupted.

[0090] 1, in some embodiments, a drive mechanism 100 may include a drive means 110 and an output gear 120. The output gear 120 is fixedly installed on the output rotation shaft of the drive means 110, so that the output gear 120 can rotate about the axis of the rotation shaft when driven by the drive means 110, thereby outputting torque.

[0091] The output gear 120 and the first rolling member 210 mesh together to drive the first rolling member 210 to rotate. The output gear 120 may be arranged so as to mesh alongside the first rolling member 210. Furthermore, by arranging the drive mechanism 100 and the door rotation mechanism 400 on the same side of the connection line between the first rolling member 210 and the rotation center 438 of the interlocking gear 300, the compactness of the arrangement can be increased to a certain extent.

[0092] 15 and 18, in some embodiments, the door lifting mechanism 500 may include a door lifting part 520. The door lifting part 520 is movably installed on the base 900, and a door lifting surface 322 is provided in the position limiting groove 320 of the interlocking gear 300. When the interlocking gear 300 is driven to rotate by the drive mechanism 100, the door lifting surface 322 rotates together with the interlocking gear 300, pushing the door lifting part 520 to move relative to the base 900, so that the door lifting part can lift the door body 13.

[0093] In some embodiments, when the door body 13 is closed, one end of the door thrust portion 520 is located in the position limiting groove 320. When the interlocking gear 300 is rotating, the door thrust surface 322 of the interlocking gear 300 pushes the door thrust portion 520 to move relative to the base 900, pushing the door body 13, and then interlocks the door rotation mechanism 400 so that the door body 13 continues to rotate.

[0094] In one or more embodiments of the present disclosure, the door 13 is closed to the box 12 to enhance the sealing effect between them, so it is common to press the door 13 against the box 12 with a relatively large pressure or to adhere the door 13 to the box 12 using an adhesive structure. This results in a relatively large adhesive force between the door 13 and the box 12. When opening the door 13, a relatively large force is required to separate or adhere the door 13 to the box 12. On the condition that the interlocking gear 300 is rotating, the door push-up surface 322 pushes the door push-up section 520 to move relative to the box body 12, pushing up the door body 13 with a relatively large force, and the door push-up surface 322 installed on the interlocking gear 300 directly acts on the door push-up section 520, thereby directly pushing up the door body 13; in other words, by driving the interlocking gear 300 to rotate using the drive mechanism 100, the door push-up section 520 can push up the door body 13. The door rotation mechanism 400 allows the door body 13 to open to a greater opening angle, which reduces the number of parts in the entire door opening and closing device, increases the degree of integration of the entire door opening and closing device, and has the effect of applying a force in a direction that stabilizes the push-up.

[0095] In some embodiments, under the condition that the interlocking gear 300 is rotating, the door push-up part 520 cannot rotate together with the interlocking gear 300, but the door push-up part 520 can move toward or away from the door body 13 by the action of the door push-up surface 322, thereby pushing up the door body 13. The door push-up part 520 can be attached to the outer surface of the door push-up surface 322. During the process of the interlocking gear 300 rotating, the door push-up part 520 can move toward or away from the door body 13 by changing the shape of the outer surface of the door push-up surface 322, thereby pushing up the door body 13.

[0096] That is, in one or more embodiments of the present disclosure, there is no direct connection between the door thrust portion 520 and the door thrust surface 322, and the door thrust portion may or may not contact the door thrust surface 322. Due to the driving configuration, when the interlocking gear 300 is driven to rotate, the door thrust portion comes into contact with the door thrust surface 322, and the door thrust surface 322 pushes the door thrust portion so that it moves toward the door body 13, thereby pushing up the door body 13.

[0097] In other words, in one or more embodiments of the present disclosure, the door push-up surface 322 rotates together with the interlocking gear 300, and the door push-up portion 520 moves linearly, providing the direction and effect of applying a force that stabilizes the push-up.

[0098] For ease of explanation, the rotation direction in which the interlocking gear 300 opens the door body 13 is defined as a forward rotation. When the door opening and closing device receives a signal to open the door, the drive structure drives the interlocking gear 300 to rotate in the forward direction, and the door rotation mechanism 400 rotates in the forward direction together with the interlocking gear 300, thereby opening the door body 13. When the door opening and closing device receives a signal to close the door, the drive structure drives the interlocking gear 300 to rotate in the opposite direction, and the door rotation mechanism 400 rotates in the opposite direction together with the interlocking gear 300, thereby closing the door body 13.

[0099] 15, 18, 22, 23 and 24, in some embodiments, on the condition that the door push-up surface 322 rotates together with the interlocking gear 300, the door push-up surface 322 abuts against the door push-up portion 520, pushing the door push-up portion 520 to move relative to the base 900, and the door body 13 can be pushed up by the door push-up portion 520.

[0100] The door push-up surface 322 may be installed on one side of the position limiting groove 320, facing the transition surface 328. When the door push-up surface 322 rotates together with the interlocking gear 300, the door push-up surface 322 abuts against the door push-up portion 520, causing the door push-up portion 520 to move in a direction approaching the door body 13, and the door push-up portion 520 gradually extends outward from the box body 12. As the interlocking gear 300 rotates, the portion of the door push-up portion 520 that extends outward from the door body 13 increases, and the door body 13 can be gradually pushed up.

[0101] In some embodiments, the door push-up surface 322 is installed so as to be convex on the interlocking gear 300, and the distance between each point on the door push-up surface 322 and the center of the interlocking gear 300 is different, and the distance between each point on the door push-up surface 322 and the rotation center 438 of the interlocking gear 300 is different. Therefore, during the rotation of the interlocking gear 300, the door push-up surface 322 causes the door push-up part 520 to come into contact with the door body 13 and move in the direction approaching it, and the door push-up part gradually pushes up the door body 13.

[0102] In some embodiments, the door push-up surface 322 gradually extends in a direction away from the rotation center 438 of the interlocking gear 300. This can be understood as the door push-up surface 322 being installed at an incline. When the door body 13 is closed to the box body 12, the door push-up portion 520 is located in the position limiting groove 320 at the connection portion between the door push-up surface 322 and the circumferential surface of the interlocking gear 300, at a position closest to the rotation center 438 of the interlocking gear 300. Because the door push-up surface 322 is installed at an incline and convex in a direction away from the rotation center 438 of the interlocking gear 300, when the interlocking gear 300 is rotated by the driving mechanism, the door push-up surface 322 abuts against the door body 13 so that the door push-up portion 520 moves in a direction toward the door body 13, causing the door push-up portion 520 to gradually extend out of the box body 12 and push up the door body 13.

[0103] It is easy to understand that the angle at which the door thrust portion 520 thrusts up the door body 13 depends on the distance between the door thrust surface 322 and the turning center 438 of the interlocking gear 300, so for ease of explanation, the point on the door thrust surface 322 that is farthest from the turning center 438 of the interlocking gear 300 is defined as the connection point 326. The greater the distance between the connection point 326 and the turning center 438 of the interlocking gear 300, the longer the extension length of the door thrust portion 520 and the greater the angle at which the door body 13 opens.

[0104] In some embodiments, the angle at which the door push-up portion 520 pushes up the door body 13 is 3 to 5 degrees, and the specific angle can be flexibly set based on the angle required for the door body 13 to overcome the resistance force to open the door.

[0105] In some embodiments, during the process of the door body 13 being pushed up and abutted by the door push-up surface 322, the door body 13 may have already been pushed up due to the central position of the door push-up surface 322. During the subsequent rotation process, the door body 13 may open by a relatively small angle, which makes it convenient for the door rotation mechanism 400 to continue opening the door body 13.

[0106] 18 and 24, some embodiments may further include an avoidance surface 324 on the circumferential surface of the interlocking gear 300. The avoidance surface 324 is connected to the door thrust surface 322, and when the door thrust portion and the door thrust surface 322 are released from contact with each other, the door thrust portion 520 can track against the avoidance surface 324.

[0107] In the forward rotation direction of the interlocking gear 300, the door push-up surface 322 is disposed in front of the avoidance surface 324. In other words, during the rotation of the interlocking gear 300, the door push-up surface 322 first comes into contact with the door push-up part 520, pushing up the door push-up part 520 so that it moves toward the door body 13, and when the door push-up part 520 and the door push-up surface 322 are released from contact, the door push-up part 520 comes into contact with the avoidance surface 324, allowing the door push-up part 520 to move in a direction away from the door body 13. When the door push-up part 520 pushes up the door body 13, it can be easily returned to the box body 12 and then the door can be closed.

[0108] It is easy to understand that if the avoidance surface 324 is not provided on the interlocking gear 300, when the door push-up part 520 pushes up the door body 13, the door push-up part 520 will always extend outside the door body 13. When closing the door body 13 as needed, if the door push-up part 520 is positioned outside the box body 12, interference will occur with the door body 13, making it impossible to close the door body 13. Therefore, the main purpose of providing the avoidance surface 324 is to provide a space for the door push-up part 520 to return to the box body 12 when it pushes up the door body 13, so that when the door push-up part 520 pushes up the door body 13, it can be returned to the box body 12, thereby avoiding the situation where the door body 13 cannot be returned.

[0109] In the case where the door push-up surface 322 pushes up the door push-up part 520 to the outside of the box body 12, when the avoidance surface 324 rotates to the rear of the door push-up part 520, the door push-up part 520 cannot automatically recover and cannot be automatically recovered to the box body 12 along with the avoidance surface 324. Elastic parts 510 are provided on the base 900 and the door push-up part 520, and the door push-up part 520 can be recovered into the box body 12 by the recovery force of the elastic parts 510.

[0110] 18 and 23, in other words, as the door push-up surface 322 pushes up the door push-up portion 520, the elastic portion 510 is gradually deformed, and when the connection point 326 comes into contact with the door push-up portion 520, the deformation of the elastic portion 510 reaches its maximum. Due to the drive configuration, as the interlocking gear 300 is driven to continuously rotate, the door push-up portion 520 and the door push-up surface 322 come out of contact, and when the contact is released, the avoidance surface 324 provides a space for the door push-up portion 520 to return to the box 12, and the restoring force of the elastic portion 510 causes the door push-up portion 520 to move in a direction away from the door body 13, allowing the door push-up portion 520 as a whole to return to the box 12, thereby allowing the door body 13 to be closed smoothly.

[0111] In some embodiments, the resilient member 510 may be a spring or a torsion spring, or both.

[0112] Provided that the elastic portion 510 is a spring, one end of the spring may be connected to the door thrust portion, and the other end may be fixed to the base 900, and the interlocking gear 300 may be fixed to the connecting shaft 2611. The rotating shaft is fixedly connected to the base 900. In other words, it is preferable that a portion of the spring that is separated from the door thrust portion can be connected to a fixed structure as needed.

[0113] If the elastic member 510 is a spring, the spring will gradually expand during the process of the door thrust member 520 being pushed up by the door thrust member surface 322, and when the connection point 326 comes into contact with the door thrust member 520, the amount of expansion of the spring will reach its maximum, and during the process of driving the interlocking gear 300 to continuously rotate due to the drive structure, the door thrust member 520 will release from contact with the door thrust member surface 322, and once the contact is released, the escape surface 324 will provide a space for the door thrust member 520 to return to the box body 12, and the restoring force of the spring will cause the door thrust member 520 to move in a direction away from the door body 13, and the door thrust member 520 as a whole can be returned to the box body 12, allowing the door body 13 to be closed easily.

[0114] On the condition that the spring is a torsion spring, the center portion of the torsion spring and the first end of the torsion spring are installed on the base 900, and the second end is connected to the door thrust-up portion 520. When the center portion of the torsion spring is connected to the first end and the second end, respectively, and the door thrust-up portion 520 thrusts up the door body 13, the door thrust-up portion needs to overcome the torsional force of the torsion spring.

[0115] When the elastic part 510 is a torsion spring, the torsion spring is twisted on the condition that the door push-up surface 322 pushes up the door push-up part so that it moves in the direction toward the door body 13, and when the door push-up part 520 and the door push-up surface 322 are released from the pushing, the action of the restoring force of the torsion spring allows the door push-up part 520 to move in the direction away from the door body 13 together with the avoidance surface 324, and the door push-up part 520 is reset, thereby avoiding interference between the avoidance door push-up part 520 and the door body 13 and allowing the door to be closed conveniently.

[0116] In some embodiments, the door thrust surface 322 and the avoidance surface 324 are connected to a connection point 326, and the distance between the connection point 326 and the turning center 438 of the interlocking gear 300 is greater than the distance from any point on the avoidance surface 324 and the door thrust surface to the turning center 438 of the interlocking gear 300.

[0117] In some embodiments, the door thrust surface 322 and the avoidance surface 324 may be connected to each other, and the point where they connect may be defined as a connection point 326. The connection point 326 is the point on the door thrust surface 322 and the avoidance surface 324 that is farthest from the rotation center 438 of the interlocking gear 300. When the connection point 326 is connected to the door thrust portion 520, the angle at which the door thrust portion 520 pushes up the door body 13 is the farthest. When the avoidance surface 324 rotates to the door thrust portion 520, the avoidance surface 324 provides space for the door thrust portion 520 to move away from the door body 13, allowing the door thrust portion 520 to return to the box 12 and continue closing the door smoothly.

[0118] It is easy to understand that the door body 13 gradually opens as the door push-up surface 322 pushes up the door with the door push-up portion 520. The door push-up portion 520 cannot open the door body 13 only when the connection point 326 is in contact with the door push-up portion. When the door push-up surface 322 rotates together with the moving gear 300, there is a possibility that the door push-up portion 520 will push up the door body 13 when one point on the door push-up surface 322 pushes up against the door push-up portion. When the connection point 326 pushes up against the door push-up portion 520, the opening angle of the door body 13 in the door push-up stage reaches its maximum angle.

[0119] The speed at which the door is pushed up by the door push-up unit 520 is related to the rotation speed at which the interlocking gear 300 is driven to rotate by the drive mechanism, and the faster the interlocking gear 300 rotates, the faster the door body 13 is pushed up by the door push-up unit 520. The slower the interlocking gear 300 rotates, the slower the door body 13 is pushed up by the door push-up unit 520.

[0120] In some embodiments, the avoidance surface 324 and the door thrust surface 322 may be arcuate surfaces or may be flat surfaces set at an incline.

[0121] It should be noted that in some embodiments, one end of the door rotation mechanism 400 is connected to the interlocking gear 300, and the other end is connected to the door body 13. As a result, the door push-up unit 520 and the door rotation mechanism 400 are driven by the interlocking gear 300, which has the same driving configuration, to push up the door and realize the function of opening the door. Specifically, the door push-up unit 520 first pushes the door body 13 by a relatively small angle, and then the door rotation mechanism 400 opens the door body 13 further.

[0122] 15 , in some embodiments, a mounting groove 912 may be provided in the base 900, and the door thrust member 520 may be movably provided in the mounting groove 912. The mounting groove 912 has a long strip shape, and by providing the door thrust member 520 in the mounting groove 912, it is possible to move along the extending direction of the mounting groove 912, and the door thrust member 520 may move in a direction approaching the door body 13 or in a direction away from the door body 13.

[0123] The extension direction of the mounting groove 912 is the direction from the interlocking gear 300 to the door body 13. In order to reduce the loss of the force pushing up the door when the door is pushed up by the door push-up part 520, the mounting groove 912 may be perpendicular to the door body 13 when the door body 13 is closed.

[0124] In some embodiments, the door thrust surface 322 and the interlocking gear 300 may be integrally formed. Forming the two integrally means that the interlocking gear 300 directly interacts with the door thrust portion 520, which reduces the need for other components, reduces the configuration of the door opening and closing device 11, and saves space.

[0125] The interlocking gear 300 rotates through the interlocking of the drive structure, and by installing the door thrust surface 322, the rotation can be converted into movement of the door thrust part 520, and the interlocking gear 300 can be used to thrust up the door before opening it, expanding the range of application of the interlocking gear 300, reducing the drive structure of the door thrust part 520, and reducing the structure of the door opening and closing device 11, thereby reducing the space it occupies.

[0126] To summarize the above, the door opening / closing device 11 according to the embodiment of the present disclosure closes the door body 13 to the box body 12 in order to enhance the sealing effect between them. Generally, the door body 13 is pressed against the box body 12 using a relatively large pressure, or the door body 13 is attached to the box body 12 using an adhesive structure. A relatively large adhesive force exists between the door body 13 and the box body 12, and when the door body 13 is opened, a relatively large force is required to release the adhesive force between the door body 13 and the box body 12. The door push-up surface 322 is provided on the interlocking gear 300, and the door push-up portion can be pushed by the door push-up surface 322 so that it moves toward the box body 12, provided that the interlocking gear 300 rotates. The door body 13 is then pushed up, and the door push-up surface 322 provided on the interlocking gear 300 directly interacts with the door push-up portion 520, thereby directly pushing up the door body 13. In other words, the interlocking gear 300 can be driven to rotate by one drive configuration, and the door body 13 can be pushed up by the door push-up section 520, thereby reducing the overall number of parts for the door opening and closing device 11 and increasing the degree of integration of the entire door opening and closing device.

[0127] 16, 25, 26 and 27, in some embodiments, the door push-up mechanism 500 may further be installed as a door push-up part 350 provided so as to be convex on the interlocking gear 300. When the interlocking gear 300 is rotating, the door push-up part 350 extends out of the base 900, directly overcoming the resistance force to opening the door, such as the adhesive force of the door body 13, and pushes up the door body 13, and rotates the door body 13 using the door rotation mechanism 400, thereby reducing the difficulty of opening the door to a certain extent.

[0128] What needs to be explained is that when the door push-up part 350 pushes up the door body 13, it means that the door body 13 closes the main body 12, that is, on the condition that the door body 13 is attracted to the main body 12, the door push-up part 350 rotates together with the interlocking gear 300, and in the process of the door push-up part 350 rotating, the door push-up part 350 gradually acts on the door body 13, and the door body 13 is released from the attraction between the main body 12, thereby pushing up the door body 13.

[0129] In some embodiments, the door push-up portion 350 has a door push-up point 351, and when the drive mechanism is engaged to rotate the interlocking gear 300, the door push-up point 351 abuts against the door body 13 to push up the door body 13.

[0130] In the process of the interlocking gear 300 being interlocked so as to rotate by the drive mechanism, the door push-up part 350 gradually comes into contact with the door body 13, and on the condition that the drive mechanism continuously drives the interlocking gear 300 so as to rotate, the door push-up part 350 extends to the outside of the main body 12 and pushes up the door body 13 by the door push-up point 351.

[0131] In some embodiments, the door lifting point 351 is the farthest point on the door lifting section 350 from the rotation center 438 of the interlocking gear 300, and when the driving mechanism drives the interlocking gear 300 to rotate, the door lifting section 350 rotates together with the interlocking gear 300, and the door lifting point 351 lifts the door body 13 up to the door lifting section 350, so that the door body 13 can be lifted to the farthest point.

[0132] In some embodiments, the door thrust portion 350 has an exterior surface 352 , and the door thrust point 351 is located at one end of the exterior surface 352 .

[0133] The exterior surface 352 is flat, and the upper surface point is located at one end of the exterior surface 352. When the driving mechanism drives the interlocking gear 300 to rotate, a part of the exterior surface 352 rotates to the main body 12, and another part rotates to the outside of the main body 12, and the outside part of the main body 12 gradually abuts against the door body 13 until the door pushing-up point 351 abuts against the door body 13 and pushes it up.

[0134] It is easy to understand that, in the process of the outer surface 352 rotating together with the interlocking gear 300, the part of the outer surface 352 that extends outward from the main body 12 gradually comes into contact with the door body 13, and as it rotates, the amount of extending part of the outer surface 352 increases, increasing the contact force with the door body 13, so that the door body 13 can overcome the adhesive force with the main body 12 and push up the door body 13.

[0135] When the door body 13 is closed, the exterior surface 352 is aligned with the opening of the main body 12. When the drive mechanism drives the interlocking gear 300 to rotate, the door thrust point 351 rapidly rotates to the outside of the main body 12, and the door thrust point 351 rapidly thrusts up the door body 13.

[0136] In some other embodiments, the openings of the exterior surface 352 and the main body 12 are aligned when the door body 13 is closed, thereby ensuring aesthetic appearance when the door opening / closing device 11 has not yet been activated.

[0137] When the door 13 has rotated to a predetermined opening position, the interlocking gear 300 does not drive the door rotation mechanism 400 to operate, and the application of driving force to the interlocking gear 300 is stopped, maintaining the door 13 in that rotation position, thereby interrupting the driving relationship between the door 13 and the upstream drive mechanism, avoiding interference with manual operation of the door 13 and making it easier to manually operate the door 13. However, when items are stored in the door 13 of an electrical appliance such as a refrigerator, or when the refrigerator is installed at an angle, the center of gravity of the door 13 becomes biased, causing the door 13 to rotate independently, making it impossible to maintain the opening position of the door 13, making it inconvenient to use and even resulting in a collision, posing a safety risk to the manufacturer.

[0138] 1, 2, 22, 23 and 24, in some embodiments, in order to solve the problem that the door body 13 cannot maintain its open position when the door opening / closing device is stopped, a position limiting groove 320 is provided on the interlocking gear 300, and a levitation mechanism 600 is installed on the base 900. When the interlocking gear 300 rotates to a certain position where the position limiting groove 320 and the levitation mechanism 600 face each other, the levitation mechanism 600 moves relative to the base 900 and then pushes up and abuts against the position limiting groove 320, locking the interlocking gear 300 to the base 900 and stopping the door rotation mechanism 400 from rotating the door body 13, thereby realizing levitation of the door body 13 and holding it at a predetermined open position.

[0139] In other words, by applying a compound effect to the position limiting groove 320 of the levitation mechanism, the braking position of the levitation can be limited, and the characteristics of this configuration can be used to function as a pushing-up function for the door push-up part 520, simplifying the configuration of the interlocking gear 300. Of course, an independent position limiting groove 320 can also be installed. The embodiments of the present disclosure are not limited to this.

[0140] In other words, the position limiting groove 320 rotates together with the interlocking gear 300, and the levitation mechanism 600 is movable relative to the base 900, and its movement state can be changed in response to the change in the rotating position of the interlocking gear 300. When the position limiting groove 320 rotates to a position where it matches and faces the levitation mechanism 600, the levitation mechanism 600 thrusts up and abuts against the position limiting groove 320, thereby firmly engaging with it. This locks the interlocking gear 300, restricting its rotation and braking the door rotation mechanism 400, preventing the door panel 13 from rotating in the wrong direction and ensuring that the door panel 13 is levitated in the desired position.

[0141] It should be noted that the state in which the levitation mechanism 600 and the position limiting groove 320 are firmly engaged by abutting against each other is a reversible state. When the action of the external driving force received by the interlocking gear 300 is greater than the braking force between the levitation mechanism 600 and the position limiting groove 320, the interlocking gear 300 overcomes the effect of the position limit caused by the abutting against the levitation and continues to rotate, and the interlocking gear 300 releases the braking state. By driving the door rotation mechanism 400, the door body 13 can be rotated so as to close or further widen the opening angle of the door body 13.

[0142] 17, 18, 19, 20, and 21, in some embodiments, levitation mechanism 600 may include a levitation unit 610 and a thrust unit 620. Levitation unit 610 is movably mounted on base 900 and can continuously abut against interlocking gear 300 while correspondingly thrusting into and tightly engaging with position limiting groove 320. When interlocking gear 300 causes position limiting groove 320 and levitation unit 610 to face each other, levitation unit 610 thrusts into and abuts against position limiting groove 320 while moving toward interlocking gear 300, locking interlocking gear 300 to base 900 and thereby braking interlocking gear 300. The thrusting portion 620 serves as a driving means for the levitating portion 610, and continuously provides a thrusting force to the levitating portion, thereby thrusting the levitating portion 610 against the interlocking gear 300, and together with the position limiting groove 320, can realize braking of the thrusting and abutment of the interlocking gear 300.

[0143] It should be noted that the levitating portion 610 constantly maintains a state of abutment and thrust with the interlocking gear 300 due to the action of a continuous upward thrust force, and as the interlocking gear 300 rotates, the levitating portion 610 slides on the interlocking gear 300. Only when the interlocking gear 300 rotates to a position where the position limiting groove 320 and the levitating mechanism 600 face each other does the upward thrust force cause the levitating portion 610 to move and abut against the position limiting groove 320, braking the interlocking gear 300. The continuous upward thrust allows the levitating portion 610 to track the rotating position of the interlocking gear 300 and effectively respond to the fully reached state of the position limiting groove 320. That is, when the position limiting groove 320 and the levitating mechanism 600 reach their corresponding positions, the levitating portion 610 immediately comes into abutment and firmly engages with the position limiting groove 320. A push-up abutment portion 611 may be provided on the levitation portion 610. The push-up abutment portion 611 is for contacting and pushing up against the position limiting groove 320, and specifically, by making a push-up abutment against the inside of the position limiting groove 320, it is possible to realize braking by contacting and pushing up.

[0144] 18, in some embodiments, the position limiting groove 320 may be configured as a recessed groove located on the circumferential surface of the interlocking gear 300. In combination, the pushing-up abutment 611 of the levitating part 610 may be configured as a protrusion that matches the groove shape of the recessed groove. Moreover, by ensuring that the pushing-up abutment 611 can be inserted into and removed from the recessed groove, the pushing-up abutment 611 can be smoothly and firmly engaged to apply the brake or easily removed and released from the brake.

[0145] It should be noted that a coupling surface may be provided at the groove opening of the groove for smoothly coupling with the circumferential surface of the interlocking gear 300. This allows the push-up contact portion 611 to smoothly slide into and out of the groove relative to the circumferential surface of the interlocking gear 300, thereby facilitating both braking and braking release in a simple and stable manner.

[0146] In some embodiments, the groove shape of the recessed groove may be C-shaped or V-shaped. Correspondingly, the push-up contact portion 611 may be configured as an insertable arc-shaped or spire-shaped configuration.

[0147] To allow the push-up contact portion 611 to smoothly and conveniently disengage from the groove, a certain gap may be provided between the push-up contact portion 611 and the groove. When the push-up contact portion 611 is fitted into the groove, a portion of the push-up contact portion 611 comes into contact with the inner wall of the groove. A gap is formed between the remaining portion and the groove wall. Assuming that a firm engagement can be ensured, the push-up contact portion 611 will easily disengage from the groove when a force slightly greater than the push-up force is applied.

[0148] 17 and 21, in some embodiments, a thrust position limiting groove 612 may be provided on the levitation portion 610, considering the positive effect of stabilizing the braking performance of the push-up abutment 611 with respect to the action and effect of the thrust force. By installing the thrust portion 620 in the thrust position limiting groove 612, the connection between the thrust portion 620 and the levitation portion 610 can be maintained relatively stably. This can reduce the relative swing range of the two to a certain extent, maintaining the stability of the direction of the force received by the push-up abutment 611, the direction of movement, and the contact area between the push-up abutment 611 and the position limiting groove 320, thereby ensuring the braking effect. The thrust portion 620 is directly connected to the push-up abutment 611, so that the point of action of the thrust force is concentrated on the push-up abutment 611. This reduces the risk that the direction of the thrusting force will be deflected due to a change in the posture of the levitation part 610 itself, making the thrusting and contact effect unstable.

[0149] It should be noted that by designing the push-up position limiting groove 612 and the push-up part 620 to match in size and specifications, the specifications of the push-up position limiting groove 612 are slightly larger than the width of the push-up part 620, narrowing the relative swinging space and enabling the direction of the push-up force to be stably maintained.

[0150] In some embodiments, the thrust position limiting groove 612 may be configured as a blind via that can accommodate the thrust portion 620 along the thrust force direction. By configuring the hole bottom at the thrust abutment portion 611, a limit can be formed on the circumferential position of the thrust portion 620, which in turn limits the swing range in the circumferential direction, reducing the risk of the levitation portion 610 bouncing due to the force and ensuring a stable thrust position and posture.

[0151] In some embodiments, one end of levitation portion 610 is provided with a push-up abutment portion 611. Push-up abutment portion 611 is adapted to push up and abut against position limiting groove 320 while making contact with it. A connecting portion may be provided at the other end of levitation portion 610. This connecting portion is adapted to connect to push-up portion 620, which facilitates the formation and processing of the levitation portion and simplifies the process flow.

[0152] In some embodiments, the push-up portion 610 may be an elastic portion. The elastic deformation of the elastic portion allows the levitation portion 610 to apply a sustained and continuous push-up force, ensuring that the levitation portion 610 can respond to the rotational position changes of the interlocking gear 300 with a simple configuration, with high responsiveness, and that the position limiting groove 320 can quickly push up and abut against the position limiting groove 320 when it is sufficiently positioned. At the same time, the stability of the elastic deformation of the elastic portion allows the push-up force applied to the levitation portion 610 to be maintained in a stable state, maintaining the levitation state stably, while the interlocking gear 300 can rotate and release the braking state with a relatively stable yet controllable driving force. This allows the door opening and closing device to achieve a stable, reliable, and smooth levitation function.

[0153] In view of the fact that the deformation of the elastic part is divided into compressive deformation and tensile deformation, it is necessary to establish an assembly form based on the principle that the elastic part is maintained in a relatively stable and linearly deformed state.

[0154] When an elastic thrust force is provided in a compressed state by the elastic part, the levitation part 610 is installed between the elastic part and the peripheral surface of the interlocking gear 300, and the elastic part is compressed and positioned between the base 900 and the levitation part 610, and the direction of deformation and reset is kept consistent with the direction of the thrust force, so that the elastic pushing force from the elastic part can be converted into a stable elastic thrust force and output.

[0155] When the elastic part provides an elastic thrust force in a tensioned state, the elastic part is installed in tension between the base 900 and the levitation part 610, and is held so that the deformation reset direction and the thrust force direction coincide with each other, thereby converting the elastic pulling force of the elastic part into a stable elastic thrust force and outputting it.

[0156] In some embodiments, the elastic part may be a spring, specifically a compression spring or tension spring, which can be deformed by compression or tension to provide a stable uplift force. Specifically, a compression spring is compressed between the levitation part and the base, or a tension spring is connected between the levitation part and the base in tension.

[0157] 20 and 21, specifically, the first end of the compression spring is pushed up and abuts against the push-up abutment portion 611. A boss portion 909 having a height substantially equal to that of the spring is provided on the base 900, and the second end of the compression spring is pushed up and abuts against the boss portion 909. The spring is maintained in a flat position in the axial direction, and the pushing-up force is generated stably and reliably.

[0158] In some embodiments, the first end of the tension spring is fixed to the main body of the push-up portion 610, or directly to the push-up abutment portion 611, and the second end of the tension spring is fixed to a boss portion 909 installed on the base 900, so that the tension spring and the plate surface of the base 900 are aligned as much as possible and maintain a flat posture, thereby generating a stable and reliable push-up force.

[0159] In some embodiments, a support groove 908 may be provided below the boss 909 to restrict the position of the spring, thereby ensuring a stable thrust position and preventing shaking.

[0160] Some embodiments may employ a resilient member, such as a torsion spring or other type of spring, as long as the direction of the resilience generally coincides with the direction of movement of the levitation member 610, which will not be described again here.

[0161] In some embodiments, in order to keep the movement direction of levitation unit 610 stable and prevent excessive shaking and vibration, a levitation position limiting sliding groove 906 may be provided on base 900, and the levitation unit may be installed in levitation position limiting sliding groove 906. The guiding and locking action of the side walls of the sliding groove can keep the movement direction of levitation unit 610 stable, thereby ensuring reliable braking performance.

[0162] Referring to FIG. 20 , in some embodiments, the levitation position limiting sliding groove 906 is configured as two opposing position limiting bosses 907, and the position limiting bosses 907 may have a certain length in the direction of movement of the levitation unit 610, as long as they can limit the position of the sliding stroke. An upper position limiting mechanism may be connected to the ends of the two position limiting bosses 907, which can limit the levitation unit 610 from separating from the base to a certain extent. A corresponding upper position limiting mechanism may be installed on the top cover of the base 900. By corresponding to the levitation position limiting sliding groove 906, the purpose of limiting the upper position is achieved, allowing the levitation unit 610 to always move in a stable direction, ensuring reliable braking performance.

[0163] In some embodiments, in order to stabilize the direction of movement of levitation unit 610 and limit unstable swinging, levitation unit 610 may be configured as a rod, with push-up abutment 611 located at one end closer to interlocking gear 300. That is, a long, strip-shaped component is provided, and this is combined with levitation position limiting sliding groove 906 to achieve stable sliding. The length-related characteristics and the limiting effect of levitation position limiting sliding groove 906 on the radial position of the long, strip-shaped component can be utilized to reduce the swing width to a certain extent. The longer the length of levitation position limiting sliding groove 906 and rod-shaped levitation unit 610 in the direction of the push-up force, the better the ability to limit the swing width, and the more stable the direction of movement of levitation unit 610.

[0164] It should be noted that when the door body 13 is closed, one end of the door thrust portion 520 is positioned in the position limiting groove 320, causing the levitation mechanism 600 to abut against the circumferential surface of the interlocking gear 300. When the interlocking gear 300 is rotating, the door thrust portion 520 moves relative to the base 900 via the door thrust surface 322 of the interlocking gear 300, pushing against the door body 13, and then interlocks with the door rotation mechanism 400 to continue rotating the door body 13. One end of the levitation mechanism 600 slides along the circumferential surface of the interlocking gear 300. When the levitation mechanism 600 slides to the position limiting groove 320, the levitation mechanism 600 abuts against the position limiting groove 320, providing a force that brakes the rotation of the interlocking gear 300.

[0165] 28, 29, 30 and 33, in some embodiments, in order to solve the problem that the door body 13 cannot maintain its open position when the door opening / closing device is shut down, a levitation arrangement 630 may be installed on the interlocking gear 300 and a position limiting mechanism 640 may be installed on the base 900. When the interlocking gear 300 rotates, the position limiting mechanism 630 rotates along with it, so that when the interlocking gear 300 rotates to a predetermined position for opening the door, the levitation arrangement 630 can engage with the position limiting mechanism 640, locking the interlocking gear 300 to the base 900 and braking the rotation of the door rotation mechanism 400 relative to the door body 13, thereby realizing levitation of the door body 13 and maintaining the door body 13 at its current position.

[0166] In some embodiments, position limiting mechanism 630 may include a connection portion 631 and a levitating portion 632. Levitating portion 632 is connected to interlocking gear 300 by connection portion 631. This allows levitating portion 632 to rotate together with interlocking gear 300.

[0167] Levitation unit 632 is a functional unit that engages with position limiting mechanism 640, and its shape may be matched to that of position limiting mechanism 640. When levitation unit 632 and position limiting mechanism 640 are positioned correspondingly, they can be smoothly engaged with each other and a certain degree of resistance to disengagement can be generated, that is, a braking force for interlocking gear 300 can be generated, and interlocking gear 300 can be locked to base 900.

[0168] It should be noted that the engagement state between the levitation unit 632 and the position limiting mechanism 640 may be reversible. When the action of the external driving force received by the interlocking gear 300 is greater than the braking force between the levitation unit 632 and the position limiting mechanism 640, the interlocking gear 300 transmits the external driving force to the connecting part 631, forcing the levitation unit 632 to disengage from the position limiting mechanism 640, allowing the interlocking gear 300 to continue rotating and releasing the braking state of the interlocking gear 300, so that the door rotation mechanism 400 rotates and the door body 13 closes, or the door body 13 can be driven to open further.

[0169] 29, 30, 31, 32, and 33, in some embodiments, position limiting mechanism 640 may be installed as position limiting portion 642 located on base 900, which contacts position limiting levitating portion 632 to generate a certain resistance force against movement, thereby braking interlocking gear 300. In particular, position limiting portion 642 is provided with engagement groove 643, which allows levitating portion 632 to naturally engage with engagement groove 643 when rotated to engagement groove 643, and engagement groove 643 can accommodate all or only a portion of levitating portion 632 to limit disengagement, thereby generating a braking force.

[0170] In some embodiments, in order to stably generate a braking force for the interlocking gear 300, the levitating portion 632 may be installed as an independent interlocking portion, and the shape of the interlocking portion may be set to match the groove shape of the interlocking groove 643. This allows a relatively large contact surface to be formed during engagement when the interlocking portion returns to the position of the interlocking groove 643, thereby increasing the frictional resistance during disengagement to a certain extent and generating a relatively stable braking force, which helps to better match the driving force of the interlocking gear 300, allows the interlocking gear 300 to smoothly and smoothly control the driving and braking modes, and ensures the stability and reliability of the operation of the door opening and closing device.

[0171] In some embodiments, the engaging portion may be configured as an elastically deformable portion, so that when the engaging portion engages with the groove of the engaging groove 643, it generates a certain elastic contact pressure, thereby increasing the braking force. In particular, when disengaging from the engaging groove 643, further deformation is required to disengage from the groove opening and generate a stable and reliable braking force.

[0172] It should be noted that the fitting portion rotates together with the interlocking gear 300, and therefore its movement trajectory is arc-shaped. The engagement groove 643 may be provided on the arc-shaped trajectory of the fitting portion, and may be biased to one side of the center of the interlocking gear 300. As a result, when the fitting portion rotates to the position of the engagement groove 643, it is necessary to generate a certain degree of deformation so that it can fit into the engagement groove 643, and at the same time, it is also necessary to generate a certain degree of deformation so that it can disengage from the engagement groove 643 so that a stable braking force is generated.

[0173] In some embodiments, the fitting portion may be provided in the hollow cylindrical part. The engaging groove 643 may be configured so that the groove shape also matches the cylindrical circumferential surface of the hollow cylindrical part. The deformation direction of the hollow cylindrical part is primarily in the radial direction of the hole-shaped cylindrical part, and the deformation area is the circumferential area in the length direction of the hollow cylindrical part. This allows for stable deformation through regionalization, ensuring stable braking force.

[0174] In some embodiments, the hollow cylindrical part may be made of rubber or other materials with stable elastic deformation. The specific elastic coefficient may be comprehensively set according to the position of the engagement groove 643 and the levitation part 610 to ensure smooth engagement or disengagement and reduce the vibration amplitude.

[0175] In some embodiments, the fitting portion may be integrally formed with the connecting portion 631. This can facilitate the processing of parts and improve the efficiency of assembly. The connecting portion 631 may be fixed to the interlocking gear 300 by a fixed connection mechanism, or may be integrally formed with the interlocking gear 300.

[0176] In some other embodiments, the fitting portion may be connected to the connecting portion 631 by a fixed connection configuration, which makes it easy to remove and replace. Correspondingly, the connecting portion 631 may be integrated with the interlocking gear 300, which makes it easy to assemble as a whole. Also, it may be fixed to the interlocking gear 300 by a fixed connection configuration, which makes it easy to connect, maintain, and replace.

[0177] In some embodiments, a guide part 641 may be installed on one side of the position limiting part 642 to ensure smooth levitation operation. When the interlocking gear is rotating, the levitating part can move along the guide part 641 while in contact with it. The guide part 641 can provide shock absorption and guidance, and can guide the levitating part to smoothly engage with the position limiting groove, preventing the levitating part from being unable to engage and position itself in the position limiting groove due to inertia.

[0178] In some embodiments, the guide portion 641 may be set as a guide plane tangent to the peripheral surface of the interlocking gear 300, and the engagement groove 643 may be set at one end of the guide plane. The levitation portion 632 then moves along the guide plane while in contact with it and is positioned directly into the engagement groove 643.

[0179] It should be noted that the tangent point between the guide plane and the arc-shaped locus of the levitation part 632 is located at the groove opening of the position limiting groove, and as soon as the levitation part 632 comes into contact with the guide plane, a certain contact pressure is generated, and the part is immediately engaged with the position limiting groove. When the interlocking gear 300 is released from the braking state, this contact pressure must be overcome to generate a stable thrust force, which can be combined with the driving mechanism of the interlocking gear 300 to conveniently achieve stable drive control operation.

[0180] In some embodiments, the connecting part 631 may be mounted on an elastic connecting arm that is capable of elastic deformation, so that the levitating part 632 can smoothly and stably engage with the position limiting groove through the elastic deformation of the elastic connecting arm, and can be released from the position limiting groove through the application of a stable pressure, thereby realizing smooth and uninterrupted braking and release operations.

[0181] To ensure the reliability of the levitation structure 630, the length of the elastic connecting arm should not be too long, otherwise it will be deformed too much, which will affect the force-receiving state of the levitation part, and it will not be able to stably engage with the position limiting groove, or it will be easy to come out of the position limiting groove, resulting in poor braking effect.

[0182] In some embodiments, a reinforcing rib plate 633 may be installed between the elastic connecting arm and the interlocking gear 300, which can reinforce the connection and limit excessive deformation of the elastic connecting arm to a certain extent.

[0183] In some embodiments, the connecting portion 631 is formed of a composite material, so that the connecting portion 631 has a structure in which the hardness and elasticity are gradually changed, thereby taking into consideration stable elastic deformation, reliable structural strength, and a stable form, and ensuring the stability and damping effect of the force received by the levitation portion 632.

[0184] The door opening and closing device provided by the embodiment of the present disclosure can realize automatic opening and closing of the door by interlocking the door rotation mechanism 400 with the interlocking gear 300 driven by the drive mechanism 100 to rotate the door body 13. More specifically, the forward and reverse rotation of the interlocking gear 300 can interlock the operation of the door rotation mechanism 400 to pull and push the door body 13, thereby opening and closing the door. The combination of the position limiting groove 320 installed in the interlocking gear 300 and the levitation mechanism 600 installed in the base 900 forms a levitation functional configuration as a braking functional configuration of the interlocking gear 300. The levitation mechanism 600 tracks the rotating position of the interlocking gear 300, and when the interlocking gear 300 rotates to a predetermined levitation position, the levitation mechanism 600 abuts against the position limiting groove 320, locking the interlocking gear 300 to the base 900 and braking the interlocking gear 300, braking the door rotation mechanism 400 connected to the interlocking gear 300, and thus levitating the door body 13, ensuring a stable opening angle of the door body 13, making it easier to open the door, more convenient to use, and reducing the risk of collision. At the same time, due to the combined role of the position limiting groove 320 and the installation of the door push-up surface 322 and the door push-up mechanism 500, when the interlocking gear 300 rotates, it pushes up the door push-up mechanism 500 and pushes the door body 13, overcoming the resistance force to opening the door such as the suction force of the door body 13, making it easier to rotate the door body 13 using the door rotation mechanism 400, and reducing the difficulty of opening and closing the door.

[0185] 1 and 2, in some embodiments, the door rotation mechanism 400 may include a front link 410 and a rear link 420 whose ends are connected by a hinge. The other end of the front link 410 and a first connection point 432 are rotatably connected to the door body 13, and the front link 410 is installed between the bottom surface of the interlocking gear 300 and the base 900. The rear link 420 is deflectably installed in a mounting groove 360 ​​provided on the upper surface of the interlocking gear 300, and the other end of the rear link is rotatably connected to the base 900 coaxially with the rotation axis 438 of the interlocking gear 300. In other words, the rear link 420 can rotate together with the interlocking gear 300, and can be pulled or pushed by a first pressing surface 361 and a second pressing surface 362 provided opposite the groove wall of the mounting groove 360, thereby rotating the door body 13 and opening or closing the door.

[0186] It should be noted that the front link 410 and the rear link 420 are respectively installed on both sides of the interlocking gear 300 and rotatably supported on the base 900, and by using the pre-set thickness space, there is no need for the interlocking gear 300 to occupy space, which can reduce the space requirement of the door rotation mechanism 400 in the thickness direction to a certain extent. Moreover, by installing the rear link 420 low in the mounting groove 360, the overall height of the door rotation mechanism 400 and the interlocking gear 300 assembled together can be made equal to the height of the interlocking gear 300 without being too high. In addition, by separately arranging the front link 410 and the rear link 420 on both sides and using the mounting groove 360, the overall thickness of the door opening and closing device 11 can be reduced.

[0187] In some embodiments, either the front link 410 or the rear link 420 may be installed in the space below the interlocking gear 300 and positioned above the base, and the mounting groove 360 ​​may be installed on the bottom surface of the interlocking gear. This allows the overall thickness of the door opening and closing device 11 to be reduced.

[0188] 1, in some embodiments, door rotation mechanism 400, drive mechanism 100, and release push-up member 240 may be installed on the same side of the connection line between clutch 200 and interlocking gear 300. This increases the compactness of the entire configuration to a certain extent, reduces the overall lateral installation width, enables door opening and closing device 11 to be formed in a compact size, provides excellent interchangeability for installation, effectively facilitates installation on a refrigerator, and reduces interference with the refrigerator and its surrounding environment.

[0189] In some embodiments, the door panel 13 and the box body 12 are rotatably connected to a first connection point 432, the front link 410 and the door panel 13 are connected to a second connection point 434, the rear link 420 and the front link 410 are rotatably connected to a third connection point 436, the interlocking gear 300 has a rotation center 438, and the second connection point 434 and the third connection point 436 are located on either side of the connection line between the first connection point 432 and the rotation center 438. The force application points of the two links are located on either side of the connection line. When subjected to a force, the deformation directions or tendencies of the two links are in two opposite directions on the main body of the links. This prevents deflection to the same side, maintains balance on a stable interface, and achieves a stable configuration when applying force, preventing excessive deformation from affecting the stability of the overall configuration of the door opening and closing device.

[0190] In some embodiments, the range of the included angle between the first connection line between the output gear 120 and the first rolling gear 212 and the second connection line between the second rolling gear 222 and the interlocking gear 300 is controlled to be 90 to 120 degrees, thereby providing sufficient space for the drive mechanism 100, door rotation mechanism 400, and separation push-up member 240, which are installed on the same side.

[0191] The door rotation mechanism 400 may be installed in an area surrounded by the first connecting line, the second connecting line, and the door body.

[0192] In some embodiments, the entire front link 410 and a portion of the rear link 420 rotate without contacting each other, and therefore there is no direct contact or connection with the structure, eliminating the need to install a corresponding base structure in the area through which the entire front link 410 passes. Installing the front link 410 outside the area of ​​the base 900 not only reduces the material used for the base 900, but also allows the fixed structure of the base 900 to be separated to some extent from functional parts such as areas where wiring is placed in edge areas of electrical equipment, thereby achieving excellent interchangeability and adaptability to the environment during installation.

[0193] In some embodiments, the driving means 110 is fixed to the base 900, and the output gear 120 is installed above the driving means 110 and has a certain mounting height, so that the first rolling gear 212 and the output gear 120 are installed side by side at the same height. Correspondingly, the second rolling gear 222 and the interlocking gear 300 are installed side by side at the same height, and the second rolling gear 222 is located below the first rolling gear 212. As a result, the distribution and arrangement of the thickness and width spaces are well utilized, and the overall thickness and width are both located at relatively low levels, which makes it possible to conveniently form a compact door opening and closing device.

[0194] Referring to FIG. 1, in some embodiments, an angle measuring device 800 may be installed on the interlocking gear 300 to accurately control the turning stroke of the interlocking gear 300. The angle measuring device 800 measures the turning angle of the interlocking gear 300 as a parameter for feedback control, allowing an on-site controller to control the operation of the drive mechanism 100 and the clutch 200. Generally, an angle measuring sensor directly attached to the interlocking gear 300 is preferably used. Of course, other types of angle sensors may also be used, but these will not be listed here.

[0195] An embodiment of the present disclosure further provides an electric device including a door body 13, a box body 12, and the door opening / closing device. When the clutch 200 establishes a state in which the interlocking gear 300 and the drive mechanism 100 are rollingly connected, the drive mechanism 100 drives the interlocking gear 300 to rotate, and then the door push-up mechanism 500 pushes up the door body 13, and the door rotation mechanism 400 rotates the door body 13.

[0196] Generally, the appliance may be a dishwasher, a single door refrigerator, or a dual door refrigerator.

[0197] Furthermore, technical solutions may be combined with each other between the respective embodiments, but it must be assumed that they are feasible for a person skilled in the art. If the combination of technical solutions is inconsistent with each other or cannot be realized, it should be recognized that this combination of technical solutions does not exist and is not included in the scope of protection of the present disclosure.

[0198] Although embodiments according to the present disclosure have been disclosed and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure, and that the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0199] 12 Box body 13 Door body 100 Drive mechanism 110 Driving means 120 Output gear 200 clutch 210 First rolling member 211 Engagement groove 212 First rolling gear 220 Second rolling member 221 Engagement hole 222 Second rolling gear 230 Rolling connection member 231 Connection end 2311 Connecting arm 232 Push-up end 2321 Annulus 240 Push-up member for separation 241 Push-up cover 2411 Push-up part 2412 Shaft sleeve 2413 First thrust surface 2414 Anti-rotation engagement groove 242 Push Stick 2421 Second thrust surface 2422 Push Arm 2423 Connection 243 Linear drive means 244 Bumper 250 Separation member 251 First separation section 252 Second separation section 253 Elastic reset part 260 Stopper 261 Connection 2611 Connecting shaft 262 Lock Section 263 Stopper 2631 Baffle board 300 Interlocking Gears 320 Position limiting groove 322 Door thrust surface 324 Evasion side 326 Connection Points 328 Transient surface 350 Door lifting part 351 Door thrust point 352 Exterior 360 mounting groove 361 First resistance plane 362 Second resistance surface 400 Door rotation mechanism 410 forward link 420 Backlink 432 First Connection Point 434 Second Connection Point 436 Third Connection Point 438 Turning Center 500 Door lifting mechanism 510 Elastic part 520 Door lifting part 600 Levitation Mechanism 610 Levitation Section 611 Push-up contact part 612 Push-up position limit groove 620 Push-up part 630 Levitation Configuration 631 Connection 632 Levitation Department 633 Reinforced rib plate 640 Position limiting mechanism 641 Guide Plane 642 Position restriction section 643 Engagement groove 800 Angle collection means 900 base 906 Levitation position limiting sliding groove 907 Position Restriction Boss 908 Support groove 909 Boss 912 Mounting groove 920 common rotation axis 921 Support column 922 Rotating shaft column 923 Stopper through hole 930 Anti-rotation mechanism 931 Anti-rotation rib

Claims

1. A drive mechanism (100); A linking gear (300) rotatably mounted on a base (900); a clutch (200) disposed between the drive mechanism (100) and the interlocking gear (300) for selectively rollingly connecting the drive mechanism (100) and the interlocking gear (300); a door rotation mechanism (400) having one end connected to the interlocking gear (300) and the other end connected to the door body (13); a push-up mechanism (500) connected to the interlocking gear (300) for pushing up the door body (13), The door opening and closing device is characterized in that, on the condition that the clutch (200) roll-connects the drive mechanism (100) and the interlocking gear (300), and the drive mechanism (100) drives the interlocking gear (300) to rotate, the door push-up mechanism (500) pushes the door body (13) to push it up, and then the door rotation mechanism (400) subsequently interlocks with the door body (13) to open it.

2. The clutch (200) a first rolling member (210) connected to the drive mechanism (100); a second rolling member (220) connected to the interlocking gear (300); a rolling connection member (230) coupled to the second rolling member (220) and detachably connecting the rolling connection member (230) and the first rolling member (210); 2. The door opening and closing device according to claim 1, further comprising: a separation push-up member (240) including a push-up cover (241) connected to the rolling connection member (230) and a push rod (242) for pushing the push-up cover (241), wherein the separation push-up member (240) pushes the push-up cover (241) with the push rod (242) to separate or connect the rolling connection member (230) and the first rolling member (210).

3. The rolling connection member (230) is movably connected to the second rolling member (220); 3. The door opening and closing device according to claim 2, wherein the rolling connection member (230) includes a connection end (231) coupled to the second rolling member (220) and detachably connected to the first rolling member (210), and a push-up end (232) connected to the push-up cover (241).

4. 4. The door opening and closing device according to claim 3, wherein the first rolling member (210) is a first rolling gear (212), the second rolling member (220) is a second rolling gear (222), an engagement groove (211) is provided on an axial end surface of the first rolling gear (212) that approaches the second rolling gear (222), and the connecting end (231) is detachably engaged with the engagement groove (211).

5. The door opening and closing device according to claim 4, characterized in that the second rolling gear (222) is provided with an engagement hole (221), and the connection end (231) is movably fitted into the engagement hole (221).

6. The connecting end (231) includes at least one connecting arm (2311) that is movably fitted into the hole (221); The door opening and closing device according to claim 5, characterized in that the push-up end (232) includes an annular seat (2321) fixedly connected to the connecting arm (2311), and the annular seat (2321) is rotatably connected to a push-up cover (241).

7. The door opening and closing device described in claim 6, characterized in that the push-up cover (241) includes a push-up portion (2411) and a shaft sleeve (2412) connected to the push-up portion (2411), and the annular seat (2321) is circumferentially arranged around the shaft sleeve (2412).

8. The clutch (200) further includes a separating member (250); The door opening and closing device according to any one of claims 3 to 7, characterized in that the separating members (250) are coupled to the rolling connecting member (230) and the second rolling member (220), respectively, to provide an acting force for driving the connecting end (231) to separate from the first rolling member (210).

9. The separating member (250) includes an elastic reset portion (253), 8. The door opening and closing device according to claim 7, wherein the elastic reset portion (253) has both ends respectively coupled to the rolling connecting member (230) and the second rolling member (220), thereby providing an elastic acting force for driving the connecting end (231) to separate from the first rolling member (210).

10. The clutch (200) further includes a separating member (250); The door opening and closing device according to any one of claims 3 to 9, characterized in that the separating members (250) are coupled to the rolling connecting member (230) and a base (900), respectively, to provide an acting force for driving the connecting end (231) to separate from the first rolling member (210).

11. The separating member (250) includes a first separating portion (251) and a second separating portion (252) that maintain a magnetic interaction with each other, 11. The door opening and closing device according to claim 10, wherein the first separation portion (251) is connected to the connecting member (230), and the second separation portion (252) is connected to the base (250), thereby providing a magnetic force for driving the connecting end (231) to separate from the first rolling member (210).

12. The push-up cover (241) pushes up the rolling connection member (230) in a first direction, the push-up cover (241) has a first push-up surface (2413), and the push rod (242) has a second push-up surface (2421) that contacts the first push-up surface (2413); The door opening and closing device according to any one of claims 2 to 11, characterized in that the angle between the first direction and the first push-up surface (2413) is an acute angle.

13. The disengaging push-up member (240) further includes a linear driving means (243), The door opening and closing device according to claim 12, wherein the linear driving means (243) is coupled to the push rod (242) and drives the push rod (242) to push up the push-up cover (241).

14. The disengagement push-up member (240) further includes a push rod bumper (244); The door opening and closing device according to any one of claims 2 to 13, characterized in that the push rod bumper (244) is installed between the push rod (242) and a base (250).

15. The disengagement push-up member (240) further includes an anti-rotation mechanism (930); The door opening and closing device according to any one of claims 2 to 14, characterized in that the rotation prevention mechanism (930) is installed on a base (250) and is fitted to the push-up cover (241) to prevent the push-up cover (241) from rotating.

16. The clutch (200) further includes a stop member (260); The door opening and closing device according to any one of claims 2 to 15, characterized in that the stop member (260) includes a connecting portion (261) and a stop portion (263), one end of the connecting portion (261) is fixed to the base (250), the first rolling member (210) and the second rolling member (220) are installed at the stop connecting portion (261), and the stop portion (263) is fixed to the other end of the stop connecting portion (261), thereby preventing the first rolling member (210) and the second rolling member (220).

17. The connecting portion (261) includes a connecting shaft (2611), The connecting shaft 2611 has one end fixed to the base (900), The first rolling member (210), the second rolling member (220), and the push-up cover (241) are mounted around the connecting shaft (2611), The door opening and closing device according to claim 16, characterized in that the stop portion (263) includes a baffle plate (2631) which is configured to be fixed to the other end of the connecting shaft (2611).

18. The door opening and closing device according to claim 17, characterized in that the retaining member (260) is a bolt, the connecting shaft (2611) is the round bar of the bolt, and the baffle plate (2631) is the head of the bolt.

19. The interlocking gear (300) has a door push-up part (350) installed on its circumferential surface, and the door push-up mechanism (500) includes a door push-up part (520) movably installed on the base, The door opening and closing device according to any one of claims 1 to 18, characterized in that, on the condition that the drive mechanism (100) is driven so that the interlocking gear (300) rotates, the door push-up portion (350) rotates together with the interlocking gear (300), thereby pushing the door push-up portion (520) so that it moves relative to the base, and the door push-up portion (520) can push up the door body (13).

20. The door lifting portion (350) has a door lifting surface (322), 20. The door opening and closing device according to claim 19, characterized in that, on the condition that the door push-up portion (350) rotates together with the interlocking gear (300), the door push-up surface (322) abuts against the door push-up portion (520), thereby pushing the door push-up portion (520) to move relative to the base, and the door push-up portion (520) can push up the door body (13).

21. 21. The door opening and closing device according to claim 20, wherein the door thrust surface (322) gradually extends along a direction away from the rotation center (438) of the interlocking gear (300).

22. The door opening and closing device includes an elastic portion (510), The elastic portion (510) is connected between the base (900) and the door lifting portion (520), The door opening and closing device according to claim 20, characterized in that, on the condition that the door push-up portion (520) and the door push-up surface (322) are released from their combination, the elastic portion (510) is interlocked so that the door push-up portion (520) moves together with the avoidance surface (324), and the door push-up portion (520) is reset.

23. 23. The door opening and closing device according to claim 22, wherein the elastic portion (510) is either a spring or a torsion spring.

24. The door lifting portion (350) includes an avoidance surface (324), The door opening and closing device according to claim 22, characterized in that the avoidance surface (324) is connected to the door push-up surface (322), and when the door push-up portion (520) and the door push-up surface (322) are released from contact, the door push-up portion (520) follows the avoidance surface (324) and is reset.

25. The door thrust surface (322) is connected to the avoidance surface (324) at a connection point (326); 25. The door opening and closing device according to claim 24, wherein the distance between the connection point (326) and the rotation center (438) of the interlocking gear (300) is greater than the distance from any point on the avoidance surface (324) and the door thrust surface (322) to the rotation center (438) of the interlocking gear (300).

26. The door opening and closing device further includes a levitation mechanism (600), the levitation mechanism (600) being movably installed on the base (900); The interlocking gear (300) is provided with a position limiting groove (320), 20. The door opening and closing device of claim 19, wherein when the interlocking gear (300) rotates to a state where the position limiting groove (320) and the levitation mechanism (600) face each other, the levitation mechanism (600) moves and abuts against the position limiting groove (320), thereby braking the interlocking gear (300).

27. The levitation mechanism (600) includes a levitation unit (610) and a thrust unit (620), The thrusting unit (620) is installed on the base, and the levitating unit (610) is movably installed on the base (900); The levitation unit (610) is connected to the push-up unit (620), and a push-up abutment unit (611) installed on the levitation unit (610) abuts against the interlocking gear (300); The door opening and closing device of claim 26, characterized in that when the interlocking gear (300) rotates until the position limiting groove (320) and the levitation mechanism (600) face each other, the push-up portion (620) pushes the levitation portion (610) to move, causing the push-up abutment portion (611) to push up and abut against the position limiting groove (320).

28. The push-up portion (620) is an elastic portion, The door opening and closing device according to claim 27, characterized in that the elastic part has one end connected to the base and the other end connected to the levitation part (610), and is elastically stretched and contracted between the base and the levitation part (610).

29. The base (900) is provided with a levitation position limiting slide groove (906), and the levitation unit (610) is slidably fitted into the levitation position limiting slide groove (906); The door opening and closing device according to any one of claims 26 to 28, characterized in that the elastic part (510) is installed in the levitation position limiting sliding groove (906), and one end abuts the base (900) and the other end abuts the levitation part (610).

30. The door opening and closing device according to claim 29, wherein the door push-up portion (350) is installed in the position limiting groove (320).

31. The door rotation mechanism (400) includes a front link (410) and a rear link (420) whose ends are connected by a hinge, the other end of the front link (410) is connected to the door body (13), and the other end of the rear link (420) is deflectably installed in a mounting groove (360) provided in the interlocking gear (300), The drive mechanism (100) is configured to rotate the interlocking gear (300) so that the rear link (420) pulls or pushes the front link (410), thereby pulling or pushing the door body (13). A door opening and closing device as described in any one of claims 1 to 30.

32. The front link (410) is located below the bottom surface of the interlocking gear (300), and the rear link (420) is located in the mounting groove (360) on the top surface of the interlocking gear (300); Or, 32. The door opening and closing device according to claim 31, wherein the mounting groove (360) is located on the bottom surface of the interlocking gear (300), and the front link (410) and the rear link (420) are both located below the bottom surface of the interlocking gear (300).

33. The door body (13) and the box body (12) are rotatably connected at a first connection point (432), the front link (410) and the door body (13) are connected at a second connection point (434), and the rear link (420) and the front link (410) are rotatably connected at a third connection point (436); 33. The door opening and closing device according to claim 32, wherein the interlocking gear (300) has a turning center (438), and the second connection point (434) and the third connection point (436) are located on either side of a connection line between the first connection point (432) and the turning center (438), respectively.

34. A door opening and closing device according to any one of claims 1 to 33, comprising a door body (13), a box body (12), and When the clutch (200) establishes a state in which the interlocking gear (300) and the drive mechanism (100) are connected by rolling, the drive mechanism (100) drives the interlocking gear (300) to rotate, and the door push-up mechanism (500) pushes up the door body (13), and then the door rotation mechanism (400) interlocks with the door body (13) to rotate.

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