Door body anti-falling device and household appliance

Abstract

The invention belongs to the technical field of electrical equipment, and particularly relates to a door body anti-falling device and a household appliance. The buffering piece of the door body anti-falling device is at least partially elastic, the buffering piece is connected between a machine body and a door body, and the buffering piece is provided with a limiting part; the triggering piece is connected to the machine body, the triggering piece is provided with a first position and a second position, and the triggering piece reciprocates between the first position and the second position; the induction piece is connected to the machine body and is provided with an induction part; when the trigger piece is located at the first position, the trigger piece is limited by the limiting part of the buffer piece, and the trigger piece is separated from the sensing part; when the trigger piece is located at the second position, the trigger piece triggers the induction part so that the induction part can generate a trigger signal. The safety hidden danger that the door body falls due to the fact that the door body is opened on the premise that the buffering piece fails can be avoided, safety and user experience are improved, and good practicability is achieved.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, specifically relating to a door anti-fall device and a household appliance. Background Technology

[0002] The doors of household appliances such as dishwashers use automatic opening technology. After the appliances open automatically, there is a risk that the door may fall, which could cause safety hazards and affect the user experience. Summary of the Invention

[0003] This application provides a door anti-fall device and a household appliance, which aims to at least to some extent avoid the safety hazard of the household appliance falling after the door is opened, so as to improve safety and user experience.

[0004] In a first aspect, this application provides a door anti-fall device for use in a household appliance. The household appliance includes a body and a door, the door being closably connected to the body. The door anti-fall device includes: a buffer member, at least partially elastic, connected between the body and the door, the buffer member having a limiting portion; a trigger member connected to the body, the trigger member having a first position and a second position, the trigger member reciprocating between the first position and the second position; and a sensor member connected to the body and having a sensing part. When the trigger member is in the first position, the trigger member is limited by the limiting portion of the buffer member, and the trigger member and the sensing part are separated. When the trigger member is in the second position, the trigger member triggers the sensing part, causing the sensing part to generate a trigger signal.

[0005] In the door anti-fall device provided in this application, when the trigger of the detection component is in the first position, the trigger of the detection component is limited by the buffer component that is working normally, and the sensing part and the trigger of the detection component are separated. When the buffer component fails, due to the lack of the buffer component's restriction, the trigger of the trigger component moves from the first position to the second position. When the trigger is in the second position, the sensing part is triggered by the trigger to generate a trigger signal to confirm whether the buffer component is working normally, thereby avoiding the safety hazard of the door falling when the door is opened under the premise of buffer component failure, so as to improve safety and user experience, and has good practicality.

[0006] In some implementations, the trigger is provided with a support portion, which is limited by the limiting portion of the buffer when the trigger is in the first position.

[0007] In some implementations, the trigger is provided with a support portion, which is limited by the limiting portion of the buffer when the trigger is in the first position.

[0008] In some embodiments, the trigger is provided with a trigger portion, the trigger portion and the support portion are arranged at intervals, and at least part of the trigger portion protrudes from the support portion; when the trigger is in the second position, the trigger portion abuts against the sensing portion.

[0009] In some embodiments, the support and the sensing part are staggered along the direction of movement of the trigger.

[0010] In some embodiments, the trigger includes a support shaft and a support wheel, the support wheel being rotatable relative to the trigger via the support shaft, and the support wheel being roll-connected to a limiting portion of the buffer.

[0011] In some embodiments, the device further includes a carrier having a guide cavity, one end of the trigger being elastically connected within the guide cavity, and the other end extending out of the opening of the guide cavity.

[0012] In some embodiments, the carrier is tilted relative to the body, the trigger moves back and forth in the tilting direction, and the sensing part is disposed in the moving direction of the trigger.

[0013] In some embodiments, the buffer includes a tension spring and a pull cord connected to connect the door and the body; wherein, when the trigger is in a first position, the trigger is limited by the pull cord.

[0014] In some embodiments, at least a portion of the pull cord is inclined, and when the trigger is in the first position, the trigger abuts against the inclined portion of the pull cord, the inclined portion of the pull cord being configured as the limiting portion.

[0015] In some embodiments, the tilting direction of the support member and the tilting direction of the limiting portion are arranged to intersect; the tilting portion of the pull rope is connected to the door body.

[0016] In some embodiments, the sensing component includes a sensing protrusion configured as the sensing portion, wherein when the trigger portion is in a second position, the trigger member abuts against the sensing portion to generate a trigger signal.

[0017] In some embodiments, at least a portion of the trigger is magnetic; the sensing portion of the sensing assembly includes two or more metal parts, at least one of the metal parts being movably disposed; wherein: when the trigger is in the second position, the trigger drives at least one of the metal parts to move, causing two or more of the metal parts to come into contact to generate a trigger signal.

[0018] In some embodiments, it further includes: a mounting base connected to the body, wherein at least one of the trigger and the sensor is connected to the mounting base.

[0019] In a second aspect of this application, a household appliance is provided, including the aforementioned door anti-fall device.

[0020] The household appliance provided in this application can confirm whether the buffer is working properly through the cooperation of the trigger and sensor in the door anti-fall device, thereby avoiding the safety hazard of the door falling when the door is opened under the premise that the buffer fails, so as to improve safety and user experience and has great practicality. Attached Figure Description

[0021] 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.

[0022] Figure 1 Schematic diagrams of the structure of household appliances in some embodiments are shown;

[0023] Figure 2 It shows Figure 1 A schematic diagram of the base section;

[0024] Figure 3 It shows Figure 1 A schematic diagram of the assembly of the triggering component and the sensing component;

[0025] Figure 4 It shows Figure 3 Another structural diagram from a different perspective;

[0026] Figure 5 It shows Figure 3 A structural diagram showing the removal of the trigger element and metal components;

[0027] Figure 6 It shows Figure 3 A cross-sectional view;

[0028] Figure 7 It shows Figure 3 A schematic diagram of the trigger element in the middle;

[0029] Figure 8 It shows Figure 5 Another structural diagram from a different perspective;

[0030] Figure 9 A schematic diagram of the structure of the sensing element according to another embodiment is shown;

[0031] Figure 10 It shows Figure 9 A schematic diagram of the sensor structure from another perspective.

[0032] Explanation of reference numerals in the attached figures:

[0033] Door body -100;

[0034] Body-200, base-201, connector-202;

[0035] Buffer component-300, tension spring-301, pull rope-302, first steering component-303, second steering component-304;

[0036] Detection component-10;

[0037] Trigger element-400, fixing base-401, first plate-4011, second plate-4012, mounting hole-4013, trigger part-402, bearing element-403, guide cavity-404, mounting part-405, elastic element-406, limiting recess-407, limiting protrusion-408, first groove-409, anti-torsion element-410, anti-torsion recess-411, limiting element-412, reinforcing element-413, support wheel-414, support shaft-415, limiting protrusion-416, second groove-417, magnet-418; buckle-419, positioning protrusion-420, support part-421;

[0038] 500, 501, 502, 503, 504, 505, 506, 507;

[0039] Hinges-600;

[0040] Door opening component - 700. Detailed Implementation

[0041] To enable those skilled in the art to more clearly understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0042] Dishwashers are kitchen appliances that automatically clean dishes and are gradually becoming a common household appliance. They typically include a drying function to quickly dry dishes after washing, preventing bacterial growth in a damp environment.

[0043] After the dishwasher's washing cycle ends, a higher temperature is required for drying. To address the issue of high energy consumption, related technologies have implemented a system where the dishwasher door automatically opens to a certain angle after the washing cycle ends, utilizing air exchange to dry the dishes inside the machine. This allows for the rapid expulsion of hot and humid air from the dishwasher's interior, achieving a better drying effect and reducing energy consumption.

[0044] In related technologies, the dishwasher door is connected to the machine body via a buffer to ensure the safety of opening the door. If the buffer fails, it cannot provide the necessary tension. If the dishwasher door opens automatically at this time, it will fall rapidly, posing a hazard that could injure users, children, or pets. Although dishwashers can achieve the purpose of drying, they pose significant safety risks and negatively impact the user experience.

[0045] To address the aforementioned technical problems, this application provides a detection component to at least partially prevent the safety hazard of household appliances falling after their doors are opened, thereby improving safety and user experience. The detection component involved in this application can be applied to household appliances such as dishwashers, as well as other household appliances with openable doors, such as dishwashers, ovens, and sterilizers, to prevent safety hazards caused by door falls. The following explanation will use an example of the detection component being applied to a dishwasher.

[0046] Figure 1 Schematic diagrams of the structure of household appliances in some embodiments are shown. Figure 2 It shows Figure 1 A structural diagram of the base section. (Combined with...) Figure 1 as well as Figure 2 The detection component 10 provided in this application is applicable to household appliances, which include a door 100, a main body 200, and a buffer 300. The main body 200 is provided with a dispensing port, and the door 100 is closably connected to the dispensing port. The buffer 300 is connected between the door 100 and the main body 200. At least a portion of the buffer 300 is elastic. The buffer 300 has a first end and a second end. The first end of the buffer 300 is connected to the main body 200, and the second end of the buffer 300 is connected to the door 100. When the door 100 moves relative to the main body 200, the elastic portion of the buffer 300 deforms synchronously and moves with the door 100 to provide a buffering force to the door 100 to prevent the door 100 from falling. If the buffer 300 fails, it cannot provide the corresponding pulling force. If the dishwasher door opens automatically at this time, the door will fall rapidly, posing a potential hazard.

[0047] Combination Figure 1 as well as Figure 2When the household appliance is a dishwasher, the front of the dishwasher body 200 is open to form the dishwasher inlet. The door 100 can close the dishwasher inlet to form a sealed space inside the dishwasher for running the dishwasher's washing program.

[0048] Combination Figure 1 as well as Figure 2 In some embodiments, the side of the door 100 is connected to the body 200 via a hinge 600, and the top of the door 100 is connected to an opening member 700 provided on the body 200. The opening member 700 can automatically open the door 100 to a certain angle after the household appliance has completed the corresponding program, and use air exchange to dry the tableware inside the body 200, so as to quickly expel the hot and humid air inside the dishwasher, thereby achieving a better drying effect and reducing energy consumption.

[0049] Combination Figure 1 as well as Figure 2 In some embodiments, the buffer 300 includes a tension spring 301 and a pull rope 302, which are connected to connect the door 100 and the machine body 200. During the opening and closing of the door 100, the tension spring 301 of the buffer 300 deforms accordingly to drive the pull rope 302 to reciprocate. In other embodiments, the pull rope 302 may also have a certain elasticity, with an elastic deformation capacity less than that of the tension spring 301, and the pull rope 302 also deforms accordingly during the opening and closing of the door 100.

[0050] Combination Figure 1 as well as Figure 2 In one embodiment, one end of the tension spring 301 is connected to the body 200, and one end of the pull rope 302 is connected to the other end of the tension spring 301. The other end of the pull rope 302 is connected to the door body 100, that is, the door body 100 and the body 200 are connected by a combination of a tension spring 301 and a pull rope 302. In another embodiment, multiple tension springs 301 can also be provided, and adjacent tension springs 301 are connected by pull ropes 302, so that the door body 100 and the body 200 are connected by a combination of multiple tension springs 301 and pull ropes 302. During the opening and closing of the door body 100, the multiple tension springs 301 of the buffer 300 deform accordingly to drive the pull rope 302 to reciprocate.

[0051] Combination Figure 1 as well as Figure 2 In some embodiments, a base 201 is provided at the bottom of the body 200, and a connector 202 is provided on the base 201. The connector 202 can be a rod structure and is provided on the side of the base 201 near the door 100. The tension spring 301 can be a spring, one end of which is connected to the connector 202, and the other end extends horizontally away from the connector 202.

[0052] Combination Figure 1 as well as Figure 2 In some embodiments, the body 200 is also provided with a steering component, and the pull rope 302 passes around the steering component. During the opening and closing of the door 100, the reciprocating movement of the pull rope 302 generates friction with the steering component to balance the weight of the door 100, enabling it to accommodate heavier doors. Furthermore, the steering guidance of the steering component can keep the pull rope 302 taut, ensuring that the pull rope 302 can only move along a set trajectory, thus avoiding interference between the pull rope 302 and other parts of the household appliance during its movement.

[0053] Combination Figure 1 as well as Figure 2 In one embodiment, the steering component can be a wheel structure rotatably connected to the body 200. The pull rope 302 and the steering component experience rolling friction, which reduces the friction between them while allowing the pull rope 302 to move smoothly on the steering component, reducing wear and tear and extending its service life. In another embodiment, the steering component can be fixedly mounted on the body 200, with the pull rope 302 and the steering component experiencing static friction to increase the friction between them.

[0054] In some embodiments, multiple steering components can be provided. Through the friction between the multiple steering components and the pull rope 302, the opening and closing of the door 100 with different weights can be adapted, and the pull rope 302 can be kept taut so that the pull rope 302 can only move on a set track, so as to avoid the pull rope 302 interfering with other parts of the dishwasher during the movement.

[0055] Combination Figure 1 as well as Figure 2 In one embodiment, the present application provides two steering components, namely a first steering component 303 and a second steering component 304. Both the first steering component 303 and the second steering component 304 are connected to the base 201 of the body 200. The first steering component 303 and the connecting component 202 are located on opposite sides of the base 201 of the body 200 in the horizontal direction. The second steering component 304 is connected above the connecting component 202 and the first steering component 303. One end of the pull rope 302 is connected to the tension spring 301, and the other end of the pull rope 302 passes sequentially around the first steering component 303 and the second steering component 304, and is connected to the hinge 600. The pull rope 302 located between the hinge 600 and the second steering component 304 is arranged at an angle. In another embodiment, the other end of the pull rope 302 can also be connected to the side of the door body 100; this is not a limitation.

[0056] Figure 3 It shows Figure 1An assembly diagram of one type of detection component. Figure 4 It shows Figure 3 A structural diagram from another perspective. Combined with... Figures 1-4 The detection component 10 of this application is connected to the body 200. The detection component 10 includes a trigger 400 and a sensor 500. The trigger 400 has a first position and a second position. The trigger 400 reciprocates between the first position and the second position. The sensor 500 is provided with a sensing part 507. When the trigger 400 is in the first position, the sensing part 507 is separated from the trigger 400. When the trigger 400 is in the second position, the sensing part 507 is triggered by the trigger 400 to generate a trigger signal.

[0057] When the detection component 10 provided in this application is applied to a household appliance, when the trigger 400 of the detection component 10 is in the first position, the trigger 400 is limited by the buffer 300 which is in normal working condition, and the sensing part 507 of the detection component 10 is separated from the trigger. When the buffer fails, due to the lack of the restriction of the buffer 300, the trigger 400 moves from the first position to the second position. When the trigger 400 is in the second position, the sensing part 507 is triggered by the trigger 400 to generate a trigger signal to confirm whether the buffer 300 is working properly. This avoids the safety hazard of the door falling when the door is opened under the premise that the buffer 300 has failed, thereby improving safety and user experience, and has good practicality. The specific details of the detection component 10 will now be further described with reference to the accompanying drawings.

[0058] Combination Figure 2 In one embodiment, at least a portion of the pull cord 302 constituting the buffer 300 is inclined, and when the trigger 400 is in the first position, the trigger 400 abuts against the inclined portion of the pull cord 302. The inclined portion of the pull cord 302 constitutes a limiting portion of the buffer 300 to restrict the trigger 400 to the first position. In addition, the inclined portion of the pull cord 302 is connected to the door body 100 so that the trigger 400 can respond promptly in the event of failure of the buffer 300. In another embodiment, when the trigger 400 is in the first position, the trigger 400 may also abut against the horizontal portion of the pull cord 400; this application does not limit this.

[0059] Figure 5 It shows Figure 3 The diagram shows the structure of the trigger and sensing elements in the detection assembly. (Combined with...) Figures 3-5In one embodiment, the detection component 10 further includes a fixing base 401, which is generally L-shaped and includes an integrally formed first plate 4011 and a second plate 4012. The first plate 4011 can be arranged vertically and has mounting holes 4013 for mounting to the base 201 of the machine body 200 using screws or other parts. The second plate 4012 can be arranged horizontally, with one end connected to the top of the first plate 4011 and the other end extending away from the door body 100. In another embodiment, the fixing base 401 can also be other shapes, such as T-shaped or V-shaped, which is not limited in this application.

[0060] Combination Figures 3-5 In one embodiment, both the trigger 400 and the sensor 500 are mounted on the fixed base 401, so that both the trigger 400 and the sensor 500 are integrated on the fixed base 401, and the trigger 400 and the sensor 500 are connected to the body 200 through the fixed base 401. In another embodiment, one of the trigger 400 and the mounting part 500 may be mounted on the fixed base 401, and the other may be mounted on the body 200; this application does not impose any limitations on this.

[0061] Combination Figures 3-5 In some embodiments, the detection assembly 10 further includes a carrier 403 connected to the bottom end of the first plate 4011 and extending toward the second plate 4012. That is, the carrier 403 is inclined to the first plate 4011 and toward the sensor 500 located on the second plate 4012. Specifically, the carrier 403 is disposed on the fixed base 401 in an inclined direction, so that the carrier 403 is inclined relative to the body 200. The trigger 400 reciprocates in this inclined direction. The sensing part 507 of the sensor 500 is disposed in the moving direction of the trigger 400. Thus, when the trigger 400 is in the second position, the trigger 400 triggers the sensing part 507 of the sensor, causing the sensor to generate a trigger signal.

[0062] Combination Figure 2 In one embodiment, the inclined direction of the support member 403 intersects with the inclined direction of the pull rope 302, and the two can be arranged perpendicularly, so that the pull rope 302 can provide effective holding force to the trigger member 400 on the support member, and the trigger member 400 can respond in a timely manner when the buffer member 300 fails. In another embodiment, the angle between the inclined direction of the support member 403 and the inclined direction of the pull rope 302 can also be an acute angle or an obtuse angle, and this application does not limit this.

[0063] Combination Figures 3-5The carrier 403 is provided with a guide cavity 404, which opens towards the sensor 500. One end of the trigger 400 is connected to the guide cavity 404, and the other end of the trigger 400 extends out of the opening and can reciprocate between the first position and the second position.

[0064] Combination Figures 3-5 The detection assembly 10 also includes an elastic element 406, and one end of the trigger element 400 is connected to the guide cavity 404 so that the trigger element 400 can be elastically connected to the guide cavity of the support element 403. Under normal conditions, the pull cord 302 of the buffer element 300 presses against the trigger element 400 to compress the elastic element 406, and the trigger element 400 and the sensing part 507 of the sensor separate. Under conditions where the buffer element 300 is abnormal or fails, the buffer element 300 cannot apply force to the trigger element 400, the elastic element 406 recovers its deformation, and drives the trigger element 400 to move towards the sensing part 507 of the sensor element 500. The sensing part 507 of the sensor element and the trigger part 402 abut against each other, so that the sensor element generates a trigger signal to confirm whether the buffer element 300 is working properly.

[0065] Combination Figures 3-5 In some embodiments, the elastic element 406 can be a spring, with one end connected to the inner wall opposite the opening of the guide cavity 404, and the other end connected to one end of the trigger element 400. Specifically, a mounting portion 405 is provided on the inner wall opposite the opening of the guide cavity 404. This mounting portion 405 includes a mounting protrusion or a mounting recess. One end of the elastic element 406 is connected to the mounting portion 405, and the other end of the elastic element 406 is sleeved on the trigger element 400, thereby achieving the assembly connection of the elastic element 406 between the guide cavity 404 and the trigger element 400.

[0066] Figure 6 It shows Figure 3 sectional view diagram, Figure 7 It shows Figure 3 A structural schematic diagram of the trigger element 400. (Combined with...) Figure 6 as well as Figure 7In one embodiment, a limiting recess 407 is provided on the periphery of the guide cavity 404. The limiting recess 407 can be a groove-shaped structure or a hole-shaped structure. A limiting protrusion 408 is provided on the periphery of the trigger member 400. The limiting protrusion 408 can be a block-shaped structure. The limiting protrusion 408 is movably connected to the corresponding limiting recess 407. When the trigger 400 moves within the guide cavity 404, the limiting protrusion 408 of the trigger 400 moves within the corresponding limiting recess 407 to restrict the movement displacement of the trigger 400 and prevent the trigger 400 from escaping the guide cavity 404 if the buffer 300 fails. In addition, the movement of the limiting protrusion 408 within the corresponding limiting recess 407 can also guide the movement of the trigger 400 and prevent the trigger 400 from twisting within the guide cavity 404. This ensures that, even if the buffer 300 fails, the triggering part 402 of the trigger 400 moves in the set direction to effectively contact the sensing part 507 of the sensing element 500, avoiding the safety hazard of the door 100 falling due to the inability of the two to make contact when the buffer 300 fails, thereby improving safety and user experience.

[0067] Combination Figure 6 as well as Figure 7 In one embodiment, the limiting protrusion 408 of this application is disposed on the periphery of the end of the trigger member 400 away from the sensing member 500. Multiple limiting protrusions 408 and limiting recesses 407 may be correspondingly provided, and the limiting protrusion 408 is movably connected to the corresponding limiting recess 407. In another embodiment, the limiting protrusion 408 may also be disposed in the middle of the periphery of the trigger member 400; this is not a limitation.

[0068] Combination Figure 7 Since the trigger 400 has a limiting protrusion 408 on its periphery, in order to facilitate the assembly of the trigger 400 in the guide cavity 404, the end of the trigger 400 away from the sensor 500 is provided with a first groove 409. The first groove 409 can extend towards the middle of the trigger 400 and is provided at intervals, so that the end of the trigger 400 away from the sensor 500 is elastic, can be compressed to pass through the opening of the guide cavity 404, and be pushed into the guide cavity 404. When the guide protrusion of the trigger 400 is pushed into the corresponding limiting recess 407, the guide protrusion is embedded into the corresponding limiting recess 407, and the trigger 400 can be assembled in place.

[0069] Combination Figure 5 as well as Figure 7In some embodiments, the periphery of the trigger 400 is further provided with an anti-torsion member 410, and the periphery of the guide cavity 404 is provided with an anti-torsion recess 411. The anti-torsion member 410 and the anti-torsion recess 411 are provided in a one-to-one correspondence, and the anti-torsion member 410 is movably connected to the corresponding anti-torsion recess 411. When the trigger 400 moves in the guide cavity 404, the anti-torsion protrusion of the trigger 400 moves in the corresponding anti-torsion recess 411 to guide the movement of the trigger 400 and prevent the trigger 400 from twisting in the guide cavity 404. This ensures that even if the buffer 300 fails, the triggering part 402 of the trigger 400 moves in a set direction to effectively contact the sensing part 507 of the sensing member 500, avoiding the safety hazard of the door 100 falling due to the inability of the two to make contact, thereby improving safety and user experience.

[0070] Combination Figure 5 as well as Figure 7 In some embodiments, the anti-torsion member 410 can be a plate-like structure that extends along the axial direction of the trigger member 400. The anti-torsion recess 411 can extend from the opening of the guide cavity 404 into the interior of the guide cavity 404 to facilitate the assembly of the trigger member 400 with the anti-torsion member 410 within the guide cavity 404. Furthermore, multiple anti-torsion members 410 and anti-torsion recesses 411 can be provided correspondingly for better anti-torsion effect.

[0071] Combination Figure 3 , Figure 4 , Figure 6 as well as Figure 7 In some embodiments, the trigger 400 further includes a limiting member 412, which is connected to the trigger 400 and extends perpendicular to the moving direction of the trigger 400. At least a portion of the projection of the limiting member 412 falls outside the opening along the moving direction of the trigger 400. Under the pressure of the buffer 300, the trigger 400 moves into the guide cavity 404. Since at least a portion of the projection of the limiting member 412 falls outside the opening, the limiting member 412 abuts against the opening of the guide cavity 404 to limit the movement displacement of the trigger 400. This application, through the cooperation of the limiting recess and the limiting protrusion 408, plus the limiting effect of the limiting member 412, enables the trigger 400 to reciprocate only within the set formation, preventing the trigger 400 from dislodging or shifting out of the guide cavity 404.

[0072] Combination Figure 7In one embodiment, the limiting member 412 can be a plate-shaped structure connected to the middle of the trigger member 400. A plurality of reinforcing members 413 are also connected between the limiting member 412 and the trigger member 400. In addition, the anti-torsion member 410 is also connected to the limiting member 412 to strengthen the connection between the limiting member 412 and the trigger member 400. The other end of the elastic member 406 also abuts against the limiting member 412 to limit the elastic member 406.

[0073] Combination Figure 3 as well as Figure 4 In some embodiments, the other end of the trigger 400 is connected to a support wheel 414. When the trigger 400 is in the first position, the support wheel 414 of the trigger 400 abuts against the buffer 300, so that the support wheel 414 serves as the support part 421 of the trigger assembly. The pull cord 302 of the buffer 300 passes around the support wheel 414, which on the one hand presses and restricts the trigger 400, and on the other hand, during the opening and closing of the door 100, the reciprocating movement of the pull cord 302 also generates friction with the support wheel 414 to balance the weight of the door 100, so as to accommodate the opening of a heavier door 100. In addition, the pull cord 302 can also be kept taut by the support of the elastic and compressed support wheel 414, so that the pull cord 302 can only move on a set trajectory, thereby avoiding interference between the pull cord 302 and other parts of the dishwasher during the movement. Additionally, the support wheel 414 is rotatably connected to the trigger member 400, causing the pull rope 302 of the buffer member 300 and the support wheel 414 to form rolling friction. Although this reduces the friction between the pull rope 302 and the support wheel 414, it also allows the pull rope 302 to move smoothly on the support wheel 414, reducing the wear of the pull rope 302 and improving its service life. In another embodiment, the support wheel 414 can also be fixedly mounted on the trigger member 400, with the pull rope 302 and the support wheel 414 forming static friction to increase the friction between the pull rope 302 and the steering member.

[0074] Combination Figure 3 , Figure 4 , Figure 6 as well as Figure 7 The support wheel 414 is connected to the other end of the trigger member 400 via a support shaft 415, so that the support wheel 414 is rotatably mounted on the trigger member 400. In a specific implementation, a limiting protrusion 416 is provided on the periphery of the support shaft 415, and the support wheel 414 is connected between the trigger member 400 and the limiting protrusion 416, so that the displacement of the support wheel 414 is limited by the trigger member 400 and the limiting protrusion 416, so that the support wheel 414 can only rotate on the support shaft 415 between the trigger member 400 and the limiting protrusion 416.

[0075] Combination Figure 7In one embodiment, the limiting protrusion 416 may be disposed at the end of the support shaft 415 away from the trigger member 400, and the limiting protrusion 416 may be a plurality of protrusion structures circumferentially spaced around the support shaft 415. In another embodiment, the limiting protrusion 416 may also be disposed at the middle of the support shaft 415, and the limiting protrusion 416 may also be an annular structure, without limitation.

[0076] Combination Figure 7 Since the support shaft 415 is provided with a limiting protrusion 416 on its periphery, in order to facilitate the assembly of the support wheel 414 on the support shaft 415, the support shaft 415 of this application is provided with a second groove 417 at the end away from the mounting part. The second groove 417 can extend towards the middle of the support shaft 415 and is provided in multiple intervals, so that the end of the support shaft 415 away from the mounting part is elastic to allow the support wheel 414 to pass through, so as to facilitate the assembly of the support wheel 414 on the support shaft 415.

[0077] Combination Figure 3 as well as Figure 4 In one embodiment, the other end of the trigger 400 is configured as a trigger portion 402 of the trigger 400, protruding from the support wheel 414. During the movement of the trigger 400 from the first position to the second position, the trigger portion 402 at the other end of the trigger 400 can contact the sensing portion 507 of the sensor 500 before the support wheel 414. When the trigger 400 is in the first position, the trigger portion 402 and the sensing portion 507 of the trigger 400 separate. When the trigger 400 is in the second position, the trigger portion 402 abuts against the sensing portion 507 to generate a trigger signal. Furthermore, the support portion 421 and the trigger portion 402 at the other end of the trigger 400 are arranged at intervals. Along the moving direction of the trigger 400, the support portion 421 and the sensing portion 507 are arranged in a staggered manner. When the trigger 400 moves from the first position to the second position, the support portion 421 of the trigger 400 can be prevented from colliding with the sensing portion 507 of the sensor 500.

[0078] In another embodiment, the support portion 421 of the trigger member 400 can also be used as the trigger portion 402, that is, the support portion 421 and the trigger portion 402 of the trigger member 400 are the same component. When the trigger member 400 is in the first position, the trigger portion 402 of the trigger member 400 abuts against the pull cord 302 of the buffer member 300. The trigger portion 402 and the sensing portion 507 are respectively placed on both sides of the limiting portion pull cord 302 of the buffer member 300. The trigger portion 402 and the sensing portion 507 of the trigger member 400 are separated. When the trigger member 400 is in the second position, the trigger portion 402 stops against the sensing portion 507 to generate a trigger signal.

[0079] Combination Figure 4In one embodiment, at least a portion of the trigger 400 is magnetic, for example, at least a portion of the trigger part 402 of the trigger 400 is magnetic. When the trigger 400 is in the first position, the sensing part 507 and the trigger part 402 of the sensor are respectively placed on both sides of the buffer 300. The sensing part 507 of the sensor includes two or more metal parts 501, and at least one metal part 501 is movably disposed. Under the condition of buffer failure, the trigger part 402 moves from the first position to the second position, and the trigger part 402 of the trigger 400 moves closer to the sensing part 507 of the sensor to drive at least one metal part 501 to move so that two or more metal parts come into contact to generate a trigger signal to confirm whether the buffer 300 is working properly. This avoids the safety hazard of the door 100 falling when the door is opened under the condition of buffer failure, thereby improving safety and user experience and having good practicality.

[0080] Figure 8 It shows Figure 5 A structural diagram from another perspective. Combined with... Figure 8 In some embodiments, the head of the trigger 400 is provided with a groove, and a magnet 418 is built into the groove so that the head of the trigger 400 is magnetic, so that only the head part of the trigger 400 is magnetic, so as to avoid the phenomenon that the assembly and use of other parts are affected by the overall magnetic condition of the trigger 400.

[0081] Combination Figure 4 In some embodiments, the sensing element 500 has two metal parts 501, which can be spaced apart along the moving direction of the trigger part 402, and at least a portion of at least one metal part 501 is elastic. When the buffer 300 fails, since at least a portion of the trigger 400 moving towards the sensing element 500 is magnetic, the elastic metal part 501 can be magnetically driven to move, causing the two metal parts 501 to contact each other and generate a trigger signal to confirm whether the buffer 300 is working properly. This avoids the safety hazard of the door 100 falling when the door is opened due to the failure of the buffer 300, thereby improving safety and user experience. If the failure of the buffer 300 is resolved, the trigger 400 returns to its initial position, and the elastic metal part 501 also returns to its initial position.

[0082] Combination Figure 4In one embodiment, the two metal parts 501 of this application include a first metal part 5011 near the trigger 400 and a second metal part 5012 away from the trigger 400. Both the first metal part 5011 and the second metal part 5012 are elastic, and one end of each is fixedly connected to the side of the body 200 via a mounting block 502. Under conditions of buffer failure, since at least a portion of the trigger 400 moving towards the sensor 500 is magnetic, the magnetic force can drive both metal parts 501 to deform and move towards the trigger 400, causing them to contact each other and generate a trigger signal to confirm whether the buffer 300 is functioning correctly. In another embodiment, the first metal part 5011 is made of a rigid material and is not elastic, so it will not deform or move under the action of the magnetic trigger 400. The second metal part 5012 is elastic and deforms and moves toward the first metal part 5011 under the action of the magnetic trigger 400, so that the two metal parts 501 come into contact to generate a trigger signal to confirm whether the buffer 300 is working properly.

[0083] Combination Figure 3 , Figure 4 as well as Figure 8 In one embodiment, the sensing element 500 of this application further includes a sensing base 503, which can be integrally formed on the fixing base 401. A mounting cavity 504 is provided within the fixing base 401. Both metal parts 501 are disposed in the mounting cavity 504 near the trigger element 400 via corresponding mounting blocks 502, so that the sensing element 500 and the trigger element 400 are integrated together for convenient transportation and assembly. Additionally, an opening may be provided on one side of the mounting cavity 504 to facilitate the assembly of the metal parts 501 inside the mounting cavity 504. In another embodiment, the two metal parts 501 can also be fixed to the side of the body 200 via corresponding mounting blocks 502, i.e., the sensing element 500 and the trigger element 400 are arranged separately, which is not a limitation.

[0084] Figure 9 A schematic diagram of the structure of a sensor according to another embodiment is shown. In this embodiment, the sensor 500 can be a micro switch. The sensing component has a sensing protrusion 506 on the side facing the trigger 400. The sensing protrusion 506 is configured as a sensing part 507 so that, in the event of failure of the buffer 300, the trigger 400 moves toward the sensing protrusion 506 of the sensor 500, and the trigger 400 stops against the sensing protrusion 506 of the sensor 500 to generate a trigger signal to confirm whether the buffer 300 is working properly.

[0085] Figure 10 It shows Figure 9 A schematic diagram of the sensor structure from another perspective. Combined with... Figure 9 as well as Figure 10As described above, the sensor 500 of this application is connected to the fixed base 401, and the sensor 500 can be connected to the fixed base 401 via a snap fastener 419. In a specific implementation, the snap fastener 419 can be disposed on the second plate 4012 of the fixed base 401, and the snap fastener 419 is engaged with the side of the sensor to connect the sensor 500 to the fixed base 401.

[0086] Combination Figure 10 The second plate 4012 of the fixing base 401 is provided with two or more positioning protrusions 420, and the sensing element 500 is provided with a positioning recess 505. The positioning recess 505 can be a hole-shaped structure or a groove-shaped structure. The positioning protrusions 420 are inserted into the corresponding positioning recesses 505 so that the sensing element 500 is positioned on the second plate 4012 of the fixing base 401. Then, the sensing element 500 can be assembled onto the fixing base 401 by means of the buckle 419 on the second plate 4012 of the fixing base 401.

[0087] Combination Figure 9 as well as Figure 10 The sensing element 500 of this application can be a micro switch. The sensing element 500 has a sensing protrusion 506 on the side facing the trigger 400. The sensing protrusion 506 is configured as a sensing part 507 so that, in the event of failure of the buffer 300, the trigger 400 moves toward the sensing protrusion 506 of the sensing element 500 and contacts the sensing protrusion 506 of the sensing element 500 to generate a trigger signal to confirm whether the buffer 300 is working properly.

[0088] It should be noted that buffer 300 failure refers to insufficient elastic deformation of buffer 300, or buffer 300 falling off or breaking. In addition, if it is confirmed that the buffer 300 of the door anti-fall device is abnormal, the corresponding abnormal code can be displayed on the display of the household appliance to remind the user and facilitate after-sales personnel to repair it.

[0089] The detection component 10 and the buffer in this application can constitute a door anti-fall device. The detection component 10 can confirm whether the buffer has failed, thereby avoiding the safety hazard of the door falling when the door is opened under the premise of buffer failure, so as to improve safety and user experience and has good practicality.

[0090] In addition to being applied to dishwashers, the door anti-fall device of this application can also be installed on other household appliances, such as disinfection cabinets, integrated stoves, and other household appliances with bottom-opening doors. Two door anti-fall devices are provided, each integrated with a locking device and / or an alarm device. If any one of the door anti-fall devices malfunctions, the household appliance will prevent the locking device from automatically opening the door and will alert the user via the alarm device. The user can then contact after-sales personnel for repair of the household appliance to prevent technical safety issues caused by abnormal door opening.

[0091] Based on the aforementioned door anti-fall device, this application also provides a household appliance, which includes a body 200, a door 100, and the aforementioned door anti-fall device. The body 200 is provided with a dispensing port, the door 100 is closably connected to the dispensing port of the body 200, and the aforementioned door anti-fall device is connected between the body 200 and the door 100.

[0092] Household appliances equipped with the aforementioned door anti-fall device can avoid the safety hazard of door 100 falling when the buffer 300 is opened, thus improving safety and user experience, and have great practicality.

[0093] The door anti-fall device of this application can be provided in two parts, with the two door anti-fall devices respectively located on both sides of the width direction of the door 100, so as to further improve the safety of opening the door.

[0094] As mentioned above, the household appliance in this application can be a dishwasher, or other household appliances with an openable door 100, such as a disinfection cabinet or an integrated stove, etc., without limitation.

[0095] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0096] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0097] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0098] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0099] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A door anti-fall device, applied to a household appliance, the household appliance comprising a body and a door, the door being closably connected to the body, characterized in that, The door anti-fall device includes: A buffer element, at least partially elastic, is connected between the body and the door, and the buffer element is provided with a limiting portion; A trigger element is connected to the body, the trigger element has a first position and a second position, and the trigger element reciprocates between the first position and the second position; A sensing element is connected to the body and has a sensing part; When the trigger is in the first position, the trigger is limited by the limiting portion of the buffer, and the trigger and the sensing part are separated; when the trigger is in the second position, the trigger triggers the sensing part to generate a trigger signal.

2. The door anti-fall device according to claim 1, characterized in that, The trigger is provided with a support portion. When the trigger is in the first position, the support portion is limited by the limiting portion of the buffer.

3. The door anti-fall device according to claim 2, characterized in that, The trigger is provided with a trigger portion, and the trigger portion and the support portion are arranged at intervals, with at least a portion of the trigger portion protruding from the support portion; when the trigger is in the second position, the trigger portion abuts against the sensing portion.

4. The door anti-fall device according to claim 3, characterized in that, Along the moving direction of the trigger, the support and the sensing part are arranged in a staggered manner.

5. The door anti-fall device according to claim 2, characterized in that, The trigger includes a support shaft and a support wheel. The support wheel is rotatable relative to the trigger via the support shaft, and the support wheel is in a rolling connection with the limiting portion of the buffer.

6. The door anti-fall device according to any one of claims 1-5, characterized in that, Also includes: The carrier has a guide cavity, one end of the trigger is elastically connected to the guide cavity, and the other end extends out of the opening of the guide cavity.

7. The door anti-fall device according to claim 6, characterized in that, The support member is inclined relative to the body, the trigger member reciprocates in the inclined direction, and the sensing part is disposed in the moving direction of the trigger member.

8. The door anti-fall device according to claim 7, characterized in that, The buffer includes: A tension spring and a pull rope are connected to connect the door body and the machine body; wherein, when the trigger is in the first position, the trigger is limited by the pull rope.

9. The door anti-fall device according to claim 8, characterized in that, At least a portion of the pull cord is inclined, and when the trigger is in the first position, the trigger abuts against the inclined portion of the pull cord, the inclined portion of the pull cord being configured as the limiting portion.

10. The door anti-fall device according to claim 9, characterized in that, The inclined direction of the bearing member and the inclined direction of the limiting part are arranged to intersect, and the inclined part of the pull rope is connected to the door body.

11. The door anti-fall device according to any one of claims 1-5 and 7-10, characterized in that, The sensing component includes: A sensing protrusion, configured as the sensing part, wherein when the trigger is in the second position, the trigger abuts against the sensing part to generate a trigger signal.

12. The door anti-fall device according to any one of claims 1-5 and 7-10, characterized in that, At least a portion of the trigger is magnetic; The sensing component includes two or more metal parts, at least one of which is movably disposed; wherein: When the trigger is in the second position, the trigger drives at least one of the metal parts to move, so that two or more of the metal parts come into contact to generate a trigger signal.

13. The door anti-fall device according to any one of claims 1-5 and 7-10, characterized in that, Also includes: A fixed base is attached to the body, and at least one of the trigger and the sensor is attached to the fixed base.

14. A dishwasher, characterized in that, Includes the door anti-fall device as described in any one of claims 1-13.

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