Door opening and closing device

Abstract

The invention provides a door opening and closing device, and relates to the field of intelligent kitchen appliances, the door opening and closing device is applied to a dish-washing machine, the dish-washing machine comprises a door body and a machine body, and the door body is rotationally connected with the machine body; comprising a driving mechanism, a driving piece in transmission connection with the driving mechanism, a first magnetic attraction piece connected with the driving piece and a locking assembly, and the driving piece is used for driving the first magnetic attraction piece to reciprocate in the direction close to or away from a machine body; the lock groove assembly is arranged on the door body and comprises a second magnetic attraction part, a trigger switch and a lock groove support fixedly connected with the second magnetic attraction part, the second magnetic attraction part is used for being connected with the first magnetic attraction part in a magnetic attraction mode, and the trigger switch is used for triggering the driving mechanism to control the driving part to move in the direction close to the machine body, so that the locking assembly and the lock groove support are clamped. Through cooperation of the magnetic attraction pieces and the locking assembly, a cooperation mechanism from attraction positioning to mechanical locking is formed, and the reliability and sealing performance of closing of the door body are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of smart kitchen appliance technology, specifically to a door opening and closing device. Background Technology

[0002] Current dishwashers typically rely on manual operation for door opening and closing. Users, holding dishes or with their hands full, must bend over to open the door, a cumbersome and uncomfortable process that negatively impacts user experience. With the development of smart technology, automatic door opening and closing mechanisms are increasingly being used in dishwashers, such as those controlled by voice commands. Existing solutions use a latch and a locking groove, with sensors at these points determining the interlock status. Successful interlocking drives the latch to close the door. However, because the door is driven by a flexible structure of ropes and springs, deviations can occur during opening and closing. The contact-type structure where the latch directly inserts into the groove requires high alignment precision. When the deviation exceeds the tolerance range, the latch can push the door in the opposite direction, leading to interlock failure or even door rebound, resulting in low reliability. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a door opening and closing device and a dishwasher. This door opening and closing device, through the coordinated cooperation of various magnetic components and locking components, forms a coordinated mechanism from adsorption positioning to mechanical locking, thereby achieving reliable locking of the door and effectively improving the reliability and sealing of door closure.

[0004] This invention provides a door opening and closing device for a dishwasher, the dishwasher including a door and a body, the door and the body being rotatably connected, the door opening and closing device comprising: The suction lock assembly installed on the body includes a drive mechanism, a drive component that is pulsatorically connected to the drive mechanism, a first magnetic component that is connected to the drive component, and a locking assembly. The drive component is used to drive the first magnetic component to reciprocate in a direction that is close to or away from the body. The lock slot assembly installed on the door body includes a second magnetic attractor, a trigger switch, and a lock slot bracket fixedly connected to the second magnetic attractor. The second magnetic attractor is used to magnetically attract and connect with the first magnetic attractor. The trigger switch is used to trigger the drive mechanism to control the drive member to move in a direction closer to the body, so that the locking assembly engages with the lock slot bracket.

[0005] In a possible implementation, when the angle between the door and the machine body meets a preset angle condition, the driving mechanism is used to drive the driving member to move the first magnetic suction member away from the machine body until the first magnetic suction member and the second magnetic suction member are magnetically attracted and connected, and trigger the trigger switch to generate the trigger signal; The driving mechanism drives the driving component based on the trigger signal to move the first magnetic suction component and the second magnetic suction component that are magnetically adsorbed together, along the direction close to the body until the locking component engages with the locking groove bracket.

[0006] In a possible implementation, the locking assembly includes a first locking hook and a second locking hook. The driving component is used to drive the first magnetic suction component to reciprocate relative to the locking assembly in a direction that is closer to or farther from the body; As the drive unit moves away from the machine body, the first locking hook and the second locking hook move toward each other to engage the locking assembly with the locking groove bracket. As the first magnetic chuck moves toward the body, the first and second locking hooks move in opposite directions to disengage the locking assembly from the locking slot bracket.

[0007] In a possible implementation, the first locking hook includes a first locking hook body, a first turning portion, and a first rotating shaft; the second locking hook includes a second locking hook body, a second turning portion, and a second rotating shaft; the first turning portion is connected to the driving component in a transmission connection, and the second turning portion is also connected to the driving component in a transmission connection. When the drive member moves in a direction away from the machine body, the drive member pushes the first turning part to make the first locking hook body rotate around the first rotating axis to approach the locking groove bracket, and pushes the second turning part to make the second locking hook body rotate around the second rotating axis to approach the locking groove bracket; When the drive member moves in the direction close to the body, the drive member pushes the first turning part to make the first locking hook body rotate around the first rotating axis to move away from the locking groove bracket, and pushes the second turning part to make the second locking hook body rotate around the second rotating axis to move away from the locking groove bracket.

[0008] In a possible implementation, the driving member includes a first guide slope and a first limiting surface facing the first locking hook, and a second guide slope and a second limiting surface facing the second locking hook. The first turning portion includes a first abutting plate, a first turning position, and a second abutting plate fixedly connected. The second turning portion includes a third abutting plate, a second turning position, and a fourth abutting plate fixedly connected in sequence. The reciprocating motion of the drive component drives the first locking hook and the second locking hook to move until they engage with the locking groove bracket. During this process, the first turning part can move with the first turning position as the fulcrum until the second abutting plate is in contact with the first guide slope, and the second turning part can move with the second turning position as the fulcrum until the fourth abutting plate is in contact with the second guide slope. The reciprocating motion of the drive component drives the first locking hook and the second locking hook to move. During the process of disengaging from the locking groove bracket, the first turning part can move with the first turning position as the fulcrum until the first abutting plate is in contact with the first limiting surface, and the second turning part can move with the second turning position as the fulcrum until the third abutting plate is in contact with the second guide slope.

[0009] In a possible implementation, the suction lock assembly further includes a first elastic element and a second elastic element; The first elastic element and the first locking hook elastically cooperate to provide the driving element abutting against the first locking hook, and the second elastic element and the second locking hook elastically cooperate to provide the driving element abutting against the second locking hook.

[0010] In a possible implementation, the driving member and the first magnetic suction member are rotatably connected; The adsorption connection area of ​​the first magnetic attractor and the second magnetic attractor can be adjusted through the rotational connection between the driving component and the first magnetic attractor.

[0011] In a possible implementation, the suction lock assembly further includes a rotating bracket; The rotating bracket is disposed between the first magnetic component and the driving component. The first magnetic component is fixedly connected to the rotating bracket, and the rotating bracket is rotatably connected to the driving component.

[0012] In a possible implementation, the door opening and closing device further includes a cover plate, on which the first magnetic element is disposed; When the first magnetic suction component and the second magnetic suction component are magnetically attached together, the cover plate abuts against the trigger switch to trigger the trigger switch.

[0013] In a possible implementation, the door opening and closing device further includes a buffer member disposed on the side of the cover plate facing the second magnetic member, and the buffer member is capable of engaging with the cover plate and the lock groove bracket respectively. In a possible implementation, the suction lock assembly further includes a first gear and a second gear; The drive mechanism is meshed with the first gear in the gear assembly, and the drive member is meshed with the second gear in the gear assembly. The transmission ratio between the first gear and the second gear is greater than 1.

[0014] In a possible implementation, the locking assembly further includes a stop switch, which is electrically connected to the drive mechanism; When the drive component moves to a preset position along the direction close to the body, the drive component triggers the stop switch to generate a stop signal, which is used to control the drive mechanism to close.

[0015] In a possible implementation, the first magnetic attractor and the second magnetic attractor have a magnetic attraction force of 20N-50N. The door opening and closing device provided in this application has the following beneficial effects: This application provides a door opening and closing device for a dishwasher. The dishwasher includes a door and a main body, which are rotatably connected. The device includes: a suction-lock assembly mounted on the main body, comprising a drive mechanism, a drive member pulsatorically connected to the drive mechanism, a first magnetic suction member connected to the drive member, and a locking assembly. The drive member drives the first magnetic suction member to reciprocate in a direction approaching or away from the main body. A lock groove assembly mounted on the door includes a second magnetic suction member, a trigger switch, and a lock groove bracket fixedly connected to the second magnetic suction member. The second magnetic suction member is magnetically attracted to the first magnetic suction member. The trigger switch triggers the drive mechanism to control the drive member to move in a direction approaching the main body, so that the locking assembly engages with the lock groove bracket. Through the coordinated operation of the various magnetic suction members and the locking assembly, a coordinated mechanism from suction positioning to mechanical locking is formed, achieving reliable locking of the door and effectively improving the reliability and sealing of door closure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the opening and closing device according to an embodiment of this application; Figure 2 This is an exploded view of the door opening and closing device according to an embodiment of this application; Figure 3 This is an exploded view of the suction lock assembly according to an embodiment of this application; Figure 4 This is an exploded view of the lock slot assembly according to an embodiment of this application; Figure 5 This is a first-view structural schematic diagram of the door opening and closing device according to an embodiment of this application; Figure 6 This is an enlarged view of point A in an embodiment of this application; Figure 7 This is a second-view structural schematic diagram of the door opening and closing device according to an embodiment of this application; Figure 8 This is an enlarged view of section B in an embodiment of this application.

[0018] The following is supplementary explanation of the attached figures: 1. Door body; 3. Locking assembly; 31. Drive mechanism; 32. Transmission mechanism; 33. Drive component; 331. First guide ramp; 332. First limiting surface; 333. Second guide ramp; 334. Second limiting surface; 341. First magnetic suction component; 342. Rotating bracket; 343. Cover plate; 351. First lock hook; 3511. First turning part; 3512. First rotating shaft; 3513. First lock hook body; 352. Second lock hook; 3521. Second turning part; 3522. Second rotating shaft; 3523. Second lock hook body; 353. First elastic component; 354. Second elastic component; 36. Buffer component; 37. Stop switch; 4. Lock groove assembly; 41. Second magnetic suction component; 42. Trigger switch; 43. Lock groove bracket. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative effort are within the scope of protection of the present application.

[0020] The term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of this application. In the description of this application, it should be understood that the terms "upper," "lower," "top," "bottom," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0021] Understandably, traditional dishwashers require manual operation to open or close the door. When users are holding dishes and need to open the dishwasher door, it becomes difficult and inconvenient, and bending over is uncomfortable, leading to a poor user experience. With technological advancements, kitchen appliances are becoming increasingly intelligent, and automatic door opening and closing mechanisms are now being used in dishwashers. For example, voice control can open or close the door at nearly 90 degrees, making dishwashers more convenient and significantly improving the user experience. To prevent sudden changes in speed or collisions during door rotation, dishwashers use a combination of ropes and springs to open and close the door. For the automatic door closing mechanism, to avoid loud noise and potential safety issues caused by the door colliding directly with the door frame during final closing, the user or drive mechanism first pulls the door to a certain position to stop. After interlocking with the main moving parts and the door, the door is slowly pulled to close completely. Due to the combined effects of inertial forces, the variability of the flexible structure of ropes and springs, and detection errors, the door's stopping position will have a certain angular deviation, making precise door position control impossible. This can lead to door deviations exceeding the allowable tolerances for the engagement between the latch and the door's locking groove. Furthermore, existing latches and locking grooves involve contact sliding before hooking. During the latch's movement, a pushing force is applied to the door, causing it to rotate away from the latch. This type of interlocking device has a significant risk of failure.

[0022] Existing solutions propose a locking device that uses a movable latch mounted on the dishwasher body to de-lock the door lock groove at a certain angle. Position sensors installed on the latch and lock groove determine if interlocking is successful. Upon successful interlocking, the latch is driven to move away from the door, ultimately closing the door and frame. However, this locking device has a high probability of interlocking failure and is unreliable.

[0023] In view of this, in order to solve at least one of the above problems, this application provides a door opening and closing device, which achieves automatic adsorption and mechanical locking of the door and the machine body through the coordinated cooperation of the magnetic suction component and the locking component. This not only effectively improves the reliability and sealing of the door closure, but also enhances the safety during the operation of the equipment. This device is particularly suitable for the scenario of opening and closing the dishwasher door.

[0024] Specifically, the door opening and closing device of this application is applied to household appliances that require automatic closing and reliable locking between the door and the machine body, including but not limited to dishwashers, and can also be steam ovens, disinfection cabinets, storage cabinets, etc.

[0025] The following is in conjunction with the appendix Figure 1-4This application provides a door opening and closing device, which is applied to a dishwasher. The dishwasher includes a door body 1 and a machine body, which are rotatably connected. The door opening and closing device includes a suction lock assembly 3 disposed on the machine body, which includes a drive mechanism 31, a drive member 33 that is pulsatorically connected to the drive mechanism 31, a first magnetic suction member 341 that is connected to the drive member 33, and a locking assembly. The drive member 33 is used to drive the first magnetic suction member 341 to reciprocate in a direction that approaches or moves away from the machine body. The lock slot assembly 4 installed on the door body 1 includes a second magnetic suction member 41, a trigger switch 42, and a lock slot bracket 43 fixedly connected to the second magnetic suction member 41. The second magnetic suction member 41 is used to magnetically attach to the first magnetic suction member 341. The trigger switch 42 is used to trigger the drive mechanism 31 to control the drive member 33 to move in a direction closer to the machine body so that the locking assembly engages with the lock slot bracket 43.

[0026] Through the cooperation between the driving component 33, the first magnetic suction component 341, the second magnetic suction component 41 and the locking component, a coordinated closing mechanism from adsorption positioning to mechanical locking is formed, thereby achieving reliable locking of the door 1.

[0027] In one embodiment, the door 1 and the machine body are rotatably connected by a hinge assembly, and the included angle between the door 1 and the machine body is 0°-90°. The suction lock assembly 3 is embedded in the cabinet, and the cabinet includes a door frame assembly. The suction lock assembly 3 is detachably connected to the door frame assembly. The suction lock assembly 3 includes a drive mechanism 31, a transmission mechanism 32, a drive member 33, and a first magnetic suction member 341. The door opening and closing device is also equipped with a controller. The suction lock assembly 3 also includes a transmission mechanism 32. The controller is electrically connected to the drive mechanism 31. The transmission mechanism 32 is disposed between the drive mechanism 31 and the drive member 33. The drive mechanism 31 and the drive member 33 are connected by transmission through the transmission mechanism 32.

[0028] In this embodiment of the specification, the driving component 33 is a push rod. The driving component 33 includes a first transmission part, a push rod body, and a damping part. The first transmission part is connected to the transmission mechanism 32. The first transmission part and the push rod body are fixedly connected. The first transmission part is used to receive the rotational or linear displacement output by the driving mechanism 31 and transmit the power to the push rod body. The damping part is located on the side away from the first magnetic attractor 341. The damping part is used to absorb excess impact force when the push rod is retracted or pushed to the limit position. The push rod body is used as a force transmission structure connecting the first magnetic attractor 341 and the driving mechanism 31.

[0029] Specifically, when the door 1 opens and closes, the drive mechanism 31 of the magnetic locking assembly 3 controls the drive component 33 to move the first magnetic suction component 341 away from the main body. At this time, the door 1 is in a suspended state. The first magnetic suction component 341 gradually approaches the second magnetic suction component 41 installed on the door 1. When the first magnetic suction component 341 and the second magnetic suction component 41 reach the magnetic attraction condition, they attract and fix each other, and the door 1 is initially positioned. As the first magnetic suction component 341 and the second magnetic suction component 41 engage, the trigger switch 42 installed on the door 1 is pressed by the cover plate 343 or the magnetic suction component structure. The trigger switch 42 generates a trigger signal and transmits it to the drive mechanism 31. After receiving the trigger signal, the drive mechanism 31 controls the drive component 33 to move the magnetically attached assembly closer to the main body, pushing the door 1 to close further. At the same time, the drive component 33 drives the locking assembly to move so that the locking assembly engages with the lock groove bracket 43 on the door 1, realizing the mechanical locking of the door 1 and ensuring that the door 1 is securely closed.

[0030] Specifically, during the opening of the door 1, the drive mechanism 31 drives the drive component 33 in the opposite direction, causing the first magnetic suction component 341 to move away from the second magnetic suction component 41. The magnetic suction components separate, the locking component is released from its engagement with the lock groove bracket 43, and the door 1 opens.

[0031] Specifically, such as Figures 5-6 As shown, when the angle between the door body 1 and the machine body meets the preset angle condition, the drive mechanism 31 is used to drive the drive component 33 to move the first magnetic suction component 341 away from the machine body until the first magnetic suction component 341 and the second magnetic suction component 41 are magnetically attracted and connected, and trigger the trigger switch 42 to generate a trigger signal. The drive mechanism 31 drives the drive component 33 based on the trigger signal, which drives the first magnetic suction component 341 and the second magnetic suction component 41 that are magnetically attached to each other to move along the direction close to the body until the locking component engages with the locking slot bracket 43.

[0032] Thus, when the door 1 reaches the preset position, the drive mechanism 31 first drives the first magnetic suction member 341 and the second magnetic suction member 41 to achieve magnetic adsorption, and triggers the switch 42 to drive the entire suction member to move inward so that the locking component and the lock groove bracket 43 can be engaged and connected. This realizes continuous linkage control from magnetic adsorption to engagement and locking, improving the automation level and sealing reliability of the door 1 closing.

[0033] Specifically, the preset angle condition is indicated as an angle between 1° and 10° between the door body 1 and the machine body. At this time, the controller or user starts the drive mechanism 31. The drive mechanism 31 starts, and the control drive component 33 drives the first magnetic suction component 341 to move away from the machine body. As the first magnetic suction component 341 moves, when the first magnetic suction component 341 approaches the second magnetic suction component 41 and reaches the magnetic adsorption range, the first magnetic suction component 341 and the second magnetic suction component 41 achieve magnetic adsorption connection. The contact of the first magnetic suction component 341 drives the trigger switch 42 on the structural pressure lock groove bracket 43 set on the cover plate 343, thereby triggering the trigger switch 42 and generating a trigger signal.

[0034] In one embodiment, the preset angle condition is that the included angle between the door 1 and the machine body is a preset angle threshold ±5° and the included angle between the door 1 and the machine body is greater than zero. Optionally, the preset angle threshold is 5°.

[0035] Specifically, the second magnetic attractor 41 is an electromagnet assembly. When the angle between the door body 1 and the machine body meets the preset angle condition, the electromagnet assembly is also activated accordingly. The electromagnet assembly is in an energized working state to attract the approaching first magnetic attractor 341, so that the first magnetic attractor 341 and the electromagnet assembly form a magnetic connection.

[0036] Optionally, the first magnetic component is a permanent magnet material or an easily magnetized metal material.

[0037] Specifically, after receiving the trigger signal, the drive mechanism 31 continues to drive the drive member 33, controlling the drive member 33 to drive the first magnetic suction member 341 and the second magnetic suction member 41, which are magnetically attracted and connected, to move in the direction closer to the body, pushing the door 1 to close further and reducing the angle between the door 1 and the body. As the first magnetic suction member 341 and the second magnetic suction member 41 move, the locking assembly moves closer to the lock groove bracket 43 along with the first magnetic suction member 341 and the second magnetic suction member 41, and completes the engagement with the lock groove bracket 43 under the action of the drive member 33, finally realizing the locking of the door 1.

[0038] In one embodiment, a sealing element is provided between the door 1 and the cabinet body. The sealing element is used to achieve a sealing function during the closing of the door 1, and the sealing element is detachably connected to the door 1 and / or the cabinet body. In one possible implementation, when the sealing element and the sealing contact surface are in a pre-sealed state, the included angle between the door 1 and the machine body meets a preset angle condition.

[0039] In one embodiment, the locking assembly includes a first locking hook 351 and a second locking hook 352, and the driving member 33 is used to drive the first magnetic member 341 to reciprocate relative to the locking assembly in a direction close to or away from the body. When the drive component 33 moves away from the machine body, the first locking hook 351 and the second locking hook 352 move toward each other to make the locking assembly engage with the locking groove bracket 43. When the first magnetic accumulator 341 moves in the direction close to the body, the first locking hook 351 and the second locking hook 352 move in opposite directions to disengage the locking assembly from the locking slot bracket 43.

[0040] In this way, the first locking hook 351 and the second locking hook 352 can work with the driving component 33 to engage and unlock the lock slot bracket 43, realizing automatic linkage control of locking and unlocking actions, and improving the reliability of locking and the sensitivity of control response.

[0041] Specifically, the first locking hook 351 and the second locking hook 352 are symmetrically arranged on both sides of the driving member 33. The first locking hook 351 and the second locking hook 352 form a clamping space. The driving member 33 can reciprocate within the clamping space. The driving mechanism 31 drives the push rod so that the driving member 33 can drive the first magnetic suction member 341 to reciprocate relative to the locking assembly in a direction close to or away from the machine body.

[0042] Specifically, during the movement of the driving component 33 away from the body, the first magnetic suction component 341 moves away from the body along with the driving component 33, causing the locking component to move accordingly. The first locking hook 351 and the second locking hook 352 move closer to each other, so that the first locking hook 351 and the second locking hook 352 simultaneously retract inward and insert into the corresponding slots on the lock slot bracket 43, realizing the locking component and the lock slot bracket 43 engaging and locking. Conversely, during the movement of the driving component 33 towards the body, the first magnetic suction component 341 returns inward, causing the locking component to move accordingly. The first locking hook 351 and the second locking hook 352 simultaneously open outward, releasing the engagement state between each locking hook and the lock slot bracket 43, realizing the unlocking and separation of the locking component.

[0043] In one embodiment, such as Figures 7-8 As shown, the first locking hook 351 includes a first locking hook body 3513, a first turning part 3511 and a first rotating shaft 3512, and the second locking hook 352 includes a second locking hook body 3523, a second turning part 3521 and a second rotating shaft 3522. The first turning part 3511 is connected to the driving member 33 in a transmission connection, and the second turning part 3521 is also connected to the driving member 33 in a transmission connection. When the drive member 33 moves in a direction away from the machine body, the drive member 33 pushes the first turning part 3511 to make the first locking hook body 3513 rotate around the first rotating shaft 3512 to approach the locking groove bracket 43, and pushes the second turning part 3521 to make the second locking hook body 3523 rotate around the second rotating shaft 3522 to approach the locking groove bracket 43. When the drive member 33 moves in the direction close to the body, the drive member 33 pushes the first turning part 3511 to make the first locking hook body 3513 rotate around the first rotating shaft 3512 to move away from the locking groove bracket 43, and pushes the second turning part 3521 to make the second locking hook body 3523 rotate around the second rotating shaft 3522 to move away from the locking groove bracket 43.

[0044] The linear reciprocating motion of the drive component 33 drives the turning part to achieve synchronous rotation of the locking hook. The locking component has smooth and rapid action during clamping and releasing, avoiding jamming or interlocking failure caused by unilateral drive or asynchronous action.

[0045] Specifically, when the driving member 33 moves away from the machine body, it simultaneously pushes the first turning part 3511 and the second turning part 3521, causing the first locking hook body 3513 to rotate clockwise around the first rotating shaft 3512 and the second locking hook body 3523 to rotate counterclockwise around the second rotating shaft 3522. The first locking hook body 3513 and the second locking hook body 3523 move towards the locking groove bracket 43 simultaneously, thereby achieving the clamping and engagement of the locking hook body with the locking groove bracket 43. When the driving component 33 moves away from the machine body, the driving component 33 simultaneously pushes the first turning part 3511 and the second turning part 3521, causing the first locking hook body 3513 to rotate counterclockwise around the first rotating shaft 3512 and the second locking hook body 3523 to rotate clockwise around the second rotating shaft 3522. The first locking hook body 3513 and the second locking hook body 3523 simultaneously unfold towards the direction away from the lock groove bracket 43, thereby releasing the locking state and realizing the release of the door body 1.

[0046] In one embodiment, the driving member 33 includes a first guide slope 331 and a first limiting surface 332 facing the first locking hook 351, and a second guide slope 333 and a second limiting surface 334 facing the second locking hook 352. The first turning portion 3511 includes a first abutting plate, a first turning position and a second abutting plate fixedly connected. The second turning portion 3521 includes a third abutting plate, a second turning position and a fourth abutting plate fixedly connected in sequence. The drive component 33 reciprocates to drive the first locking hook 351 and the second locking hook 352 to move. During the process of engaging with the lock groove bracket 43, the first turning part 3511 can move with the first turning position as the fulcrum until the second abutting plate is in contact with the first guide slope 331, and the second turning part 3521 can move with the second turning position as the fulcrum until the fourth abutting plate is in contact with the second guide slope 333. The drive member 33 reciprocates to drive the first locking hook 351 and the second locking hook 352 to move. During the process of disengaging from the locking groove bracket 43, the first turning part 3511 can move with the first turning position as the fulcrum until the first abutting plate and the first limiting surface 332 are in contact. The second turning part 3521 can move with the second turning position as the fulcrum until the third abutting plate and the second guide slope 333 are in contact.

[0047] By setting the first and second guide ramps 333 and the first and second limiting surfaces 334 on the drive component 33, and cooperating with the first and second turning parts 3521 with multiple abutment plates and turning positions, the precise guidance and stable control of the first locking hook 351 and the second locking hook 352 are realized, thereby improving the action accuracy, stability and service life of the door opening and closing device.

[0048] Specifically, the first guide slope 331 and the first limiting surface 332 are both used to cooperate in controlling the rotation direction and rotation angle of the first locking hook 351, and the second guide slope 333 and the second limiting surface 334 are both used to cooperate in controlling the rotation direction and rotation angle of the first locking hook 351 and the second locking hook 352. The driving component 33 includes a first guide portion, the side of the first guide portion near the first locking hook 351 is the first guide slope 331, and the side of the first guide portion near the second locking hook 352 is the second guide slope 333. The first guide portion has a gradually expanding structure in the direction away from the machine body.

[0049] Specifically, when the driving component 33 is driven by the driving mechanism 31 to move towards the body and drive the first magnetic suction component 341 to close and enter the locking stage, the first turning part 3511 rotates around the first turning position as the fulcrum, so that the second abutting plate is in contact with the first guide slope 331; at the same time, the second turning part 3521 rotates around the second turning position as the fulcrum, so that the fourth abutting plate is in contact with the second guide slope 333. During the aforementioned engagement process, the first locking hook 351 and the second locking hook 352 move towards each other, gradually closing and inserting into the locking slot bracket 43 to achieve locking and fixing of the locking component with the locking slot bracket 43. When the driving component 33 moves in the opposite direction away from the body and enters the unlocking stage, the first turning part 3511 rotates in the opposite direction with the first turning point as the fulcrum, so that the first abutting plate is engaged with the first limiting surface 332. At the same time, the second turning part 3521 rotates with the second turning point as the fulcrum, so that the third abutting plate is engaged with the second limiting surface 334. The first locking hook 351 and the second locking hook 352 move in opposite directions, gradually opening and releasing the engagement with the locking slot bracket 43, thus completing the unlocking action.

[0050] Specifically, both the first locking hook 351 and the second locking hook 352 are provided with a reset device, which is used to control the bidirectional movement of the first locking hook 351 and / or the second locking hook 352.

[0051] Furthermore, the suction lock assembly 3 also includes a first elastic element 353 and a second elastic element 354; the first elastic element 353 elastically cooperates with the first locking hook 351 to provide the abutting force between the driving member 33 and the first locking hook 351, and the second elastic element 354 elastically cooperates with the second locking hook 352 to provide the abutting force between the driving member 33 and the second locking hook 352. Thus, the first elastic element 353 and the second elastic element 354 provide a stable abutting force between the driving member 33 and the locking hook, effectively buffering the contact impact between the driving member 33 and the locking hook, ensuring the tight fit and flexible rotation of each locking hook during movement, improving the vibration resistance and durability of the suction lock assembly 3, while reducing mechanical wear and noise, and enhancing the overall reliability of the door opening and closing device.

[0052] Specifically, the suction lock assembly 3 includes a housing, a first elastic element 353 disposed between the first locking hook 351 and the housing, and a second elastic element 354 disposed between the second locking hook 352 and the housing. The first elastic element 353 is used to keep the first locking hook 351 in its initial open state when not under force, and the first elastic element 353 is also used to provide a continuous abutting force between itself and the first locking hook 351 during the movement of the driving member 33. The second elastic element 354 is used to keep the second locking hook 352 in its initial open state when not under force, and the second elastic element 354 is also used to provide a continuous abutting force between itself and the second locking hook 352 during the movement of the driving member 33.

[0053] In the embodiments described in this specification, the first elastic element 353 and the second elastic element 354 are springs.

[0054] In one embodiment, the driving member 33 and the first magnetic attractor 341 are rotatably connected. Through this rotatable connection, the adsorption area of ​​the first magnetic attractor 341 and the second magnetic attractor 41 can be adjusted. Thus, the first magnetic attractor 341 can automatically center and adjust its angle as it approaches the second magnetic attractor 41, thereby increasing the actual contact area between the two magnetic surfaces and significantly improving adsorption reliability.

[0055] Specifically, the drive component 33 and the first magnetic suction component 341 are rotatably connected by a rotating assembly. The rotating assembly can provide the first magnetic suction component 341 with multi-degree-of-freedom rotational adjustment capability so that the first magnetic suction component 341 can automatically adjust the posture of its magnetic suction surface during the opening and closing of the door 1.

[0056] Furthermore, the magnetic lock assembly 3 also includes a rotating bracket 342; the rotating bracket 342 is disposed between the first magnetic member 341 and the driving member 33, the first magnetic member 341 is fixedly connected to the rotating bracket 342, and the rotating bracket 342 is rotatably connected to the driving member 33. Thus, the rotation of the driving member 33 can adjust the adsorption connection area of ​​the first magnetic member 341 relative to the second magnetic member 41, thereby achieving flexible control of the adsorption force. This not only improves the stability and reliability of the magnetic connection but also adaptively adjusts the position of the first magnetic member 341 according to different working conditions and the state of the door 1, optimizing the closing effect of the door 1.

[0057] Specifically, the rotating bracket 342 is rotatably connected to the driving component 33, and the first magnetic component 341 is fixedly connected to the rotating bracket 342. During the movement, the first magnetic component 341 can adjust its posture around the axis of the rotating bracket 342.

[0058] Specifically, the magnetic locking assembly 3 also includes a reset mechanism. The reset mechanism is used to reset the rotating bracket 342 to its initial posture after the first magnetic attractor 341 completes its attraction and disengages from the second magnetic attractor 41. The reset mechanism includes a rotating elastic element, one end of which is connected to the rotating bracket 342 and the other end of which is connected to the driving element 33. When the first magnetic attractor 341 deflects due to the magnetic attraction, the rotating elastic element undergoes elastic deformation to provide a corresponding reset force. After the magnetic attraction is released, the rotating elastic element releases the force, causing the rotating bracket 342 to drive the first magnetic attractor 341 back to its initial alignment with the driving element 33.

[0059] Furthermore, the door opening and closing device also includes a cover plate 343, on which a first magnetic suction member 341 is disposed; when the first magnetic suction member 341 and the second magnetic suction member 41 are magnetically attracted together, the cover plate 343 abuts against the trigger switch 42 to trigger the trigger switch 42. In this way, the cover plate 343 can realize direct linkage between the suction action and the trigger switch 42, ensuring that the subsequent locking action is triggered only when the door body 1 is correctly attracted into place, thus improving the response speed and reliability.

[0060] Specifically, the cover plate 343 is connected to the rotating bracket 342. The cover plate 343 is provided with a first mounting position for installing the first magnetic suction member 341. The trigger switch 42 protrudes from the lock groove bracket 43. When the first magnetic suction member 341 and the second magnetic suction member 41 are attracted and attached, the cover plate 343 moves closer to the lock groove bracket 43 along with the first magnetic suction member 341 and presses against the trigger switch 42 provided on the lock groove bracket 43, thereby triggering the trigger switch 42.

[0061] Furthermore, the door opening and closing device also includes a buffer 36, which is disposed on the side of the cover plate 343 facing the second magnetic member 41. The buffer 36 can fit into both the cover plate 343 and the lock groove bracket 43. In this way, the buffer 36 can effectively reduce the impact and vibration when the door 1 closes, reduce mechanical collision noise, protect the cover plate 343 and the lock groove bracket 43, and improve the durability and sealing performance of the door opening and closing device. Optionally, the cushioning element 36 is made of rubber, polyurethane (PU) or thermoplastic elastomer (TPE).

[0062] Specifically, the buffer 36 is fixedly connected to the cover plate 343, and the cover plate 343 is provided with a second mounting position for installing the buffer 36, with the first mounting position and the second mounting position being arranged adjacent to each other.

[0063] In one embodiment, the cover plate 343 is provided with a plurality of second mounting positions, which are distributed around the first mounting position in a circumferential manner.

[0064] Specifically, the plane where the buffer 36 is located is coplanar with the plane where the first magnetic suction member 341 is located.

[0065] Furthermore, the locking assembly 3 also includes a first gear and a second gear; the drive mechanism 31 is meshed with the first gear in the gear assembly, and the drive member 33 is meshed with the second gear in the gear assembly, with a transmission ratio greater than 1 between the first gear and the second gear. Thus, the first gear and the second gear can increase the output torque of the locking assembly 3, allowing the drive mechanism 31 to generate a greater locking force at a lower speed, ensuring stable and reliable locking action. They also reduce the speed of the second gear, making the locking or releasing process of the drive member 33 smoother and reducing impact and wear on the locking assembly 3.

[0066] Specifically, in the embodiments of this specification, the door opening and closing device includes a gear assembly, which includes a first gear and a second gear. The drive mechanism 31 is meshed with the first gear, and the drive member 33 is meshed with the second gear. The first gear and the second gear are meshed and driven together. Multiple gears are also included between the first gear and the second gear, and the rotational speed of the second gear is lower than that of the first gear.

[0067] Furthermore, the locking assembly 3 also includes a stop switch 37, which is electrically connected to the drive mechanism 31; When the drive component 33 moves to a preset position along the direction close to the machine body, the drive component 33 triggers the stop switch 37 to generate a stop signal. The stop signal is used to control the drive mechanism 31 to close. In this way, the stop switch 37 can automatically trigger the stop signal when the drive component 33 moves to the preset position, ensuring that the locking action is accurate and in place, and avoiding mechanical impact or component damage caused by overtravel.

[0068] Specifically, the stop switch 37 establishes signal communication with the drive mechanism 31 via an electrical connection. During the movement of the drive component 33 toward the machine body, when the drive component 33 moves to a preset position, that is, when the drive component 33 moves to a preset locking end point, the drive component 33 contacts and triggers the stop switch 37. After being triggered, the stop switch 37 generates a stop signal, which is transmitted to the drive mechanism 31 to control the drive mechanism 31 to cut off power or stop output, thereby stopping the movement of the drive component 33 and avoiding mechanical overload or structural impact caused by continued pushing.

[0069] Specifically, the stop switch 37 is installed at the end of the movement path of the drive component 33. When the drive component 33 advances to this position, the protrusion of the drive component 33 presses against the trigger mechanism of the stop switch 37, causing the stop switch 37 to activate. After receiving the stop signal output by the stop switch 37, the drive circuit immediately stops the drive motor to prevent the drive component 33 from continuing to move, which could cause the component to jam, be damaged, or produce noise.

[0070] Specifically, when the cover plate 343 triggers the stop switch 37, the drive component 33 stops moving, the electromagnet assembly is also de-energized and stops working under the control of the stop signal, and the magnetic attraction between the first magnetic attractor 341 and the second magnetic attractor 41 is released.

[0071] Specifically, the first magnetic attractor 341 and the second magnetic attractor 41 have a magnetic attraction force of 20N-50N. In this way, limiting the magnetic attraction force between the first magnetic attractor 341 and the second magnetic attractor 41 ensures that the magnetic lock assembly 3 closes stably, effectively preventing the risk of pinching fingers and improving the safety and reliability of the door opening and closing device.

[0072] Specifically, during the closing process, door 1 is first rotated to a hovering position forming an angle θ with the machine body by rope traction. At this point, door 1 is hovered, preventing it from closing rapidly and pinching a person. While door 1 is hovering, the magnetic attraction structure extends, and the magnetic force between the first magnetic element 341 and the second magnetic element 41 drives door 1 to slowly close. If a user's finger or other foreign object is mistakenly placed in the door frame area, as door 1 continues to close, due to the limited magnetic force, when the reaction force generated by the pinching hand exceeds this attraction force, the magnetic elements will automatically disengage, thus stopping door 1 from closing and providing anti-pinch protection.

[0073] Specifically, the attraction force required for the electromagnet to engage the door 1 is N1, and the force causing pain when the hand is clamped by the door 1 is N2. Therefore, the magnetic attraction force N between the first magnetic member 341 and the second magnetic member 41 in this application should satisfy: N1 <N<N1+ N2。

[0074] Preferably, the magnetic attraction force N between the first magnetic attractor 341 and the second magnetic attractor 41 in this application is 20N-50N.

[0075] This application also provides a dishwasher, which includes the door opening and closing device in the above possible embodiments. The dishwasher includes a door body 1 and a body, which are rotatably connected.

[0076] The following describes the closing process of a door opening and closing device in a specific application scenario: S1, in response to the door closing command, the dishwasher door 1 rotates and closes towards the machine body, and the door 1 gradually approaches the machine body; S2, when the door 1 rotates to a preset angle and the sealing element and the machine body are in a pre-sealed state, the door 1 is suspended, and the drive mechanism 31 is started to drive the push rod to move in the direction away from the machine body. The push rod drives the first magnetic suction element 341 to extend in the direction away from the door 1 and gradually approach the second magnetic suction element 41 set on the door 1. S3, the first magnetic suction component 341 and the second magnetic suction component 41 achieve magnetic adsorption connection, and at the same time drive the cover plate 343 to press the trigger switch 42 on the door body 1, and the trigger switch 42 outputs a trigger signal. S4, after receiving the trigger signal, the drive mechanism 31 controls the push rod to move in the direction closer to the machine body. The push rod drives the first magnetic suction component 341 and the second magnetic suction component 41 that have been attracted, so that the angle between the door body 1 and the machine body is reduced. S5, as the push rod continues to push, the first guide slope 331 on the drive member 33 fits into the second abutting plate of the first turning part 3511, and the second guide slope 333 on the drive member 33 fits into the fourth abutting plate in the second turning part 3521. The first turning part 3511 and the second turning part 3521 rotate around their respective turning points, thereby driving the first locking hook 351 and the second locking hook 352 to move closer to each other and close. The first locking hook 351 and the second locking hook 352 rotate towards each other and are locked in the locking groove bracket 43 on the door body 1, thus achieving mechanical locking. S6: Door 1 is closed and remains in a stable locked state, and the locking action ends.

[0077] The following describes the door opening process of the door opening device in a specific application scenario: S1, the dishwasher responds to the door opening command to activate the drive mechanism 31, and the drive mechanism 31 drives the push rod to move away from the machine body; S2, during the push rod retraction process, the drive component 33 continues to drive the first magnetic suction component 341 to move away from the second magnetic suction component 41, so that the first magnetic suction component 341 is separated from the second magnetic suction component 41 and the magnetic attraction is released. S3, as the push rod continues to retract, the first limiting surface 332 on the drive member 33 contacts the first abutting plate of the first turning part 3511, and at the same time, the second limiting surface 334 contacts the third abutting plate of the second turning part 3521. The first turning part 3511 and the second turning part 3521 rotate in opposite directions with their turning points as fulcrums, thereby driving the first locking hook 351 and the second locking hook 352 to move in opposite directions, so that the first locking hook 351 and the second locking hook 352 are disengaged from the locked groove bracket 43, thereby unlocking the locking component; S4, under the action of its own weight or user pulling force, the angle between the door body 1 and the machine body increases, and the door body gradually moves away from the machine body; S5, the seals disengage, and the angle between the door 1 and the machine body increases until the door 1 is fully open.

[0078] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A door opening and closing device, characterized in that, Applied to a dishwasher, the dishwasher includes a door (1) and a body, the door (1) and the body being rotatably connected, and the door opening and closing device includes: The suction lock assembly (3) provided on the body includes a drive mechanism (31), a drive member (33) connected to the drive mechanism (31), a first magnetic suction member (341) connected to the drive member (33), and a locking assembly. The drive member (33) is used to drive the first magnetic suction member (341) to reciprocate in a direction close to or away from the body. The lock slot assembly (4) provided on the door body (1) includes a second magnetic suction member (41), a trigger switch (42) and a lock slot bracket (43) fixedly connected to the second magnetic suction member (41). The second magnetic suction member (41) is used to magnetically attach to the first magnetic suction member (341). The trigger switch (42) is used to trigger the drive mechanism (31) to control the drive member (33) to move in a direction close to the body so that the locking assembly engages with the lock slot bracket (43).

2. The door opening and closing device according to claim 1, characterized in that, When the angle between the door body (1) and the machine body meets the preset angle condition, the driving mechanism (31) is used to drive the driving component (33) to move the first magnetic suction component (341) away from the machine body until the first magnetic suction component (341) and the second magnetic suction component (41) are magnetically attracted and connected, and trigger the trigger switch (42) to generate the trigger signal; The drive mechanism (31) drives the drive member (33) based on the trigger signal to move the first magnetic suction member (341) and the second magnetic suction member (41) that are magnetically adsorbed together, along the direction close to the body until the locking assembly engages with the locking slot bracket (43).

3. The door opening and closing device according to claim 1, characterized in that, The locking assembly includes a first locking hook (351) and a second locking hook (352); The driving component (33) is used to drive the first magnetic suction component (341) to reciprocate relative to the locking assembly in a direction that is closer to or farther from the body; When the drive member (33) moves in a direction away from the body, the first locking hook (351) and the second locking hook (352) move toward each other to engage the locking assembly with the locking groove bracket (43); When the first magnetic suction member (341) moves in a direction close to the body, the first locking hook (351) and the second locking hook (352) move in opposite directions to disengage the locking assembly from the locking slot bracket (43).

4. The door opening and closing device according to claim 3, characterized in that, The first locking hook (351) includes a first locking hook body (3513), a first turning part (3511) and a first rotating shaft (3512), and the second locking hook (352) includes a second locking hook body (3523), a second turning part (3521) and a second rotating shaft (3522). The first turning part (3511) is connected to the driving member (33) in a transmission connection, and the second turning part (3521) is also connected to the driving member (33) in a transmission connection. When the drive member (33) moves in a direction away from the machine body, the drive member (33) pushes the first turning part (3511) to make the first lock hook body (3513) rotate around the first rotating axis (3512) to approach the lock groove bracket (43), and pushes the second turning part (3521) to make the second lock hook body (3523) rotate around the second rotating axis (3522) to approach the lock groove bracket (43). When the drive member (33) moves in the direction close to the body, the drive member (33) pushes the first turning part (3511) to make the first locking hook body (3513) rotate around the first rotating axis (3512) away from the locking groove bracket (43), and pushes the second turning part (3521) to make the second locking hook body (3523) rotate around the second rotating axis (3522) away from the locking groove bracket (43).

5. The door opening and closing device according to claim 4, characterized in that, The driving component (33) includes a first guide slope (331) and a first limiting surface (332) facing the first locking hook (351), and a second guide slope (333) and a second limiting surface (334) facing the second locking hook (352). The first turning part (3511) includes a first abutting plate, a first turning position and a second abutting plate fixedly connected. The second turning part (3521) includes a third abutting plate, a second turning position and a fourth abutting plate fixedly connected in sequence. The drive member (33) reciprocates to drive the first locking hook (351) and the second locking hook (352) to move until they engage with the locking groove bracket (43). During this process, the first turning part (3511) can move with the first turning position as the fulcrum until the second abutting plate is in contact with the first guide slope (331), and the second turning part (3521) can move with the second turning position as the fulcrum until the fourth abutting plate is in contact with the second guide slope (333). The drive member (33) reciprocates to drive the first locking hook (351) and the second locking hook (352) to move. During the process of disengaging from the locking groove bracket (43), the first turning part (3511) can move with the first turning position as the fulcrum until the first abutting plate is in contact with the first limiting surface (332), and the second turning part (3521) can move with the second turning position as the fulcrum until the third abutting plate is in contact with the second guide slope (333).

6. The door opening and closing device according to claim 3, characterized in that, The suction lock assembly (3) further includes a first elastic element (353) and a second elastic element (354); The first elastic element (353) elastically engages with the first locking hook (351) to provide the driving element (33) abutting against the first locking hook (351), and the second elastic element (354) elastically engages with the second locking hook (352) to provide the driving element (33) abutting against the second locking hook (352).

7. The door opening and closing device according to any one of claims 1-6, characterized in that, The driving component (33) and the first magnetic suction component (341) are rotatably connected; Through the rotational connection between the driving member (33) and the first magnetic member (341), the adsorption connection area of ​​the first magnetic member (341) and the second magnetic member (41) can be adjusted.

8. The door opening and closing device according to claim 7, characterized in that, The suction lock assembly (3) also includes a rotating bracket (342); The rotating bracket (342) is disposed between the first magnetic suction member (341) and the driving member (33). The first magnetic suction member (341) is fixedly connected to the rotating bracket (342), and the rotating bracket (342) is rotatably connected to the driving member (33).

9. The door opening and closing device according to any one of claims 1-6, characterized in that, The door opening and closing device also includes a cover plate (343), on which the first magnetic suction member (341) is disposed; When the first magnetic suction member (341) and the second magnetic suction member (41) are magnetically attached, the cover plate (343) abuts against the trigger switch (42) to trigger the trigger switch (42).

10. The door opening and closing device according to claim 9, characterized in that, The door opening and closing device also includes a buffer (36), which is disposed on the side of the cover plate (343) facing the second magnetic suction member (41). The buffer (36) can fit against the cover plate (343) and the lock groove bracket (43) respectively.

11. The door opening and closing device according to any one of claims 1-6, characterized in that, The suction lock assembly (3) also includes a first gear and a second gear; The drive mechanism (31) is meshed with the first gear in the gear assembly, and the drive member (33) is meshed with the second gear in the gear assembly. The transmission ratio between the first gear and the second gear is greater than 1.

12. The door opening and closing device according to any one of claims 1-6, characterized in that, The suction lock assembly (3) also includes a stop switch (37), which is electrically connected to the drive mechanism (31); When the drive unit (33) moves to a preset position in a direction close to the body, the drive unit (33) triggers the stop switch (37) to generate a stop signal, which is used to control the drive mechanism (31) to close.

13. The door opening and closing device according to any one of claims 1-6, characterized in that, The first magnetic attractor (341) and the second magnetic attractor (41) have a magnetic attraction force of 20N-50N.

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