Door opening and closing assembly for household appliance and household appliance

Abstract

The door opening and closing assembly comprises a driving mechanism, a transmission part and the driving mechanism are in driving connection, the transmission part is of a closed-loop structure, and a part of the transmission part is used for being fixedly installed on a rotating part which is connected with a door body and a box body of the household appliance. Therefore, the transmission part pulls the rotating part to rotate so as to open and close the door body. When the transmission part reciprocates, the door body can be automatically opened and closed, manual operation is not needed in the whole process, automatic door opening and closing can be achieved, and the convenience for a user to use the household appliance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field, concretely relates to a switch door subassembly for domestic appliance and domestic appliance. BACKGROUND

[0002] For the box with functional inner cavity, due to functional demand, usually can set the door body that can open or cover the open mouth at the open mouth of the box, and, need to open or close the door body in the process of using the box.

[0003] Such as patent number CN202180018667.2 (publication number CN115243594A) Chinese invention patent application discloses "water guide domestic appliance including switchable automatic or manual door opening assembly", the domestic appliance includes electric appliance shell (2), the electric appliance shell (2) is provided with electric appliance compartment (3), and has the loading opening (4) for entering the electric appliance compartment (3);The domestic appliance further includes electric appliance door (5), the electric appliance door (5) is installed so that it can rotate around pivot axis to close the loading opening (4);The domestic appliance further includes motor unit (11), the motor unit (11) is operably connected with the electric appliance door (5), and the electric appliance door (5) can be transferred from the opening position to the closed position of the loading opening (4) by the motor unit (11);The domestic appliance further includes clutch device (16), the clutch device (16) is arranged between the motor unit (11) and the electric appliance door (5), and is operably connected with the motor unit (11) on the drive side, and is operably connected with the electric appliance door (5) on the driven side, characterized in that, the clutch device (16) has clutch (17), the clutch (17) is designed as switchable, and can be transferred from the disengagement position to the engagement position, and vice versa, the clutch (17) is suitable for automatic switching from the disengagement position to the engagement position during the operation of the motor unit (11). The operable connection between the motor unit (11) and the electric appliance door (5) has force transmission tool (14, 14'), in particular as force transmission tool rope (14).

[0004] But the rope of this patent is not closed loop, only can realize door control, the door action mainly utilizes the door body gravity as the main driving force.In the door process, if the door body meets external obstruction, the rope can slacken or fall off, this leads to in this time period, the door body will be quickly turned down under the action of gravity, the uniformity of door opening speed is very poor.

[0005] Furthermore, the sealing effect of this patented door relies solely on the force applied by the force transmission tool, which can easily lead to the door not closing tightly. If applied to household appliances such as steam ovens, ovens, or dishwashers, an incomplete door closure could cause water vapor to leak out, posing a safety hazard. If the force applied by the force transmission tool is increased to ensure a tight door closure, the clamping force between the door and the appliance may also increase, creating a safety risk. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a door opening and closing component for household appliances that can automatically open and close the door, in light of the current state of the technology.

[0007] The second technical problem to be solved by this utility model is to provide a household appliance that uses the above-mentioned door opening and closing components, in view of the current state of the prior art.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a door opening and closing assembly for household appliances, characterized in that it includes...

[0009] Drive mechanism;

[0010] The transmission component is connected to the drive mechanism and has a closed-loop structure. A portion of the transmission component is fixedly installed on the rotating part that connects the door and the cabinet of the household appliance, so that the transmission component pulls the rotating part to rotate to open and close the door.

[0011] The transmission component can have various structural forms. In a simple form, the transmission component includes a connecting rod and a first pull rope. The connecting rod is driven and connected to the driving mechanism and can move along its length. The two ends of the first pull rope are respectively fixedly installed at the two ends of the connecting rod. The first pull rope and the connecting rod together form a closed loop structure, and the first pull rope is partially used for fixed installation on the rotating component.

[0012] The driving mechanism can have various structural forms. Preferably, the driving mechanism includes a second transmission part, a first transmission part, and a first driving member. The first transmission part is disposed on the connecting rod and is connected to the second transmission part in a driving manner. The first driving member is connected to the second transmission part in a driving manner.

[0013] The first transmission part and the second transmission part can have various structural forms. Preferably, the first transmission part is a plurality of first teeth arranged at intervals along the length direction of the connecting rod, and the plurality of first teeth constitute a rack extending along the length direction of the connecting rod. The second transmission part is a first gear that meshes with the first transmission part.

[0014] Preferably, the household appliance further includes a guide assembly for guiding the transmission components to ensure the movement trajectory of the transmission components and improve the reliability of opening and closing the door.

[0015] The guide assembly can have various structural forms. Preferably, the guide assembly includes a first wheel, and the housing is provided with a first wheel, with the transmission member passing around the first wheel; or, the housing is provided with at least two first wheels spaced apart, and the transmission member passes around the first wheels sequentially along its length.

[0016] In order to tension the transmission component, ensure its movement trajectory, and improve the reliability of opening and closing the door, the household appliance also includes a tensioning wheel and a third elastic element acting on the tensioning wheel. The transmission component passes around the tensioning wheel, thereby keeping the transmission component in a taut state.

[0017] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a household appliance, characterized in that it includes a box body, a door body, a rotating component, and the aforementioned door opening assembly. The front side of the box body is open, the door body is located on the front side of the box body, the rotating component is fixedly connected to the lower part of the door body, and is rotatably mounted on the outer side wall of the lower part of the box body through a mounting shaft extending in the left and right direction, thereby allowing the upper part of the door body to flip back and forth.

[0018] To improve the sealing performance of the door when closed, the household appliance also includes a door lock structure, which includes...

[0019] The box body is located on top of the container.

[0020] The latch is fixedly located at the top of the door.

[0021] A locking element is located on the top of the housing. The locking element includes two locking arms that are arranged opposite each other and extend in the front-rear direction. The rear parts of the locking arms are rotatably mounted on the housing and the axis of rotation extends vertically. The front side wall of the housing has a notch for the front parts of the locking arms to be exposed. A first elastic element is provided in the housing for each locking arm. Under the action of the corresponding first elastic element, the two locking arms tend to rotate toward each other to clamp the locking tongue.

[0022] The locking element and the latch are detachably bound together; when the door is closed, the locking element and the latch are bound together; when the door is open, the locking element and the latch are disengaged.

[0023] When the door is closed, the latch and locking element are bound together, and the door lock structure locks the door and the cabinet relative to each other to achieve a seal inside the cabinet and prevent the contents from falling out. When it is necessary to open the door, the latch can disengage from the locking element without affecting the opening of the door.

[0024] To facilitate the insertion of the locking tongue between the two locking arms, the housing is also equipped with an actuation component for driving the two locking arms to rotate away from each other.

[0025] The actuation component can have various structural forms, such as a motor pulling the locking arm, but such a structure is relatively complex. Therefore, the actuation component includes a push rod and a drive structure that drives the push rod to move back and forth. The push rod is connected to the drive structure. When the door is closed, the push rod and the locking tongue are vertically offset, and both locking arms are provided with a stop block located on the forward movement path of the push rod. In this way, as the push rod moves forward, it will push the locking arm to rotate away from the other locking arm.

[0026] The drive structure can have various structural forms, such as a push rod motor. The push rod has multiple third teeth arranged sequentially along the front-to-back direction. The drive structure includes a third drive component and a third gear meshing with the third teeth. The third drive component and the third gear are drivenly connected. The third drive component can be a motor. The third gear and the output shaft of the third drive component can be directly connected or indirectly connected. For example, the output shaft of the third drive component can be connected to a worm gear, and the worm gear meshes directly with the third gear or indirectly through an intermediate gear.

[0027] To limit the backward movement of the push rod, the housing is equipped with a first detection mechanism to detect whether the push rod has moved to the correct position. This first detection mechanism includes a first microswitch, which is located within the housing and along the backward movement path of the push rod. When the push rod triggers the first microswitch, the push rod moves to its rearmost position. The forward movement of the push rod can be determined by the magnitude of the stall current of the third drive component when the push rod pushes the stop block. For example, when the stall current of the third drive component reaches a set value, the push rod moves forward to its maximum position.

[0028] In order to detect whether the bolt is locked in place with the locking component, the housing is also provided with a second detection mechanism for detecting whether the bolt is locked in place with the locking component;

[0029] The housing is also provided with a detection rod extending in the front-to-back direction. The detection rod maintains a forward movement tendency under the action of the second elastic element, and the detection rod can move backward to the part where the lock tongue is constrained by the locking element. A second micro switch is provided on the path of the detection rod moving backward. When the detection rod triggers the second micro switch, the lock tongue is in a state of being constrained by the locking element. The detection rod and the second micro switch together constitute the second detection mechanism.

[0030] To enable the detection rod to trigger the second micro switch, a trigger rod is provided in the housing. The first end of the trigger rod is rotatably mounted in the housing via a vertically extending pin. The second end of the trigger rod abuts against the rear end of the detection rod, and the middle part of the trigger rod can trigger the contact of the second micro switch. When the detection rod moves backward, it pushes the trigger rod to rotate, causing the middle part of the trigger rod to trigger the contact of the second micro switch.

[0031] In order to limit the forward movement trajectory of the detection rod, the housing is provided with a limiting structure that can restrict the forward movement trajectory of the detection rod.

[0032] In the above scheme, the detection rod is provided with a second limiting block, and the box is provided with a limiting part that can abut against the second limiting block. The limiting part is the limiting structure.

[0033] In the above scheme, the household appliance is a dishwasher.

[0034] Compared with the prior art, the advantages of this utility model are as follows: The household appliance of this utility model includes a door opening and closing assembly, which includes a transmission component. The transmission component has a closed-loop structure, so that when the transmission component moves back and forth, it can realize the automatic opening and closing of the door. The entire process does not require manual operation, thus realizing automatic door opening and closing and improving the convenience of users using household appliances; and the door opening speed can be freely controlled by the drive mechanism. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0036] Figure 2 for Figure 1 A schematic diagram of the structure from another direction;

[0037] Figure 3 for Figure 2 A structural diagram of the rotating parts, door opening / closing assembly, and pull cord assembly in the diagram;

[0038] Figure 4 for Figure 3 A schematic diagram of the rotating component in the diagram;

[0039] Figure 5 for Figure 1 A schematic diagram of the door lock structure in the diagram;

[0040] Figure 6 for Figure 5 A schematic diagram of the decomposition process;

[0041] Figure 7 for Figure 5 A schematic diagram of the structure with one half of the shell removed;

[0042] Figure 8 for Figure 7 A schematic diagram of the structure without the top rod;

[0043] Figure 9 for Figure 7 A sectional view. Detailed Implementation

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0045] Example 1

[0046] like Figures 1 to 9 As shown, the household appliance can be a steam oven, oven, dishwasher, etc. In this embodiment, the household appliance is a dishwasher. The household appliance includes a cabinet 1, a door (not shown in the figure, which can adopt an existing structure), a rotating part 2, a door opening and closing assembly 3, a pull rope assembly 4, and a door lock structure 5.

[0047] The front of the cabinet 1 is open, and the door is located on the front of the cabinet 1. The rotating part 2 is fixedly connected to the lower part of the door. The rotating part 2 is rotatably mounted on the outer side wall of the lower part of the cabinet 1 through the mounting shaft 21 extending in the left and right direction, so that the upper part of the door can be flipped back and forth. In this embodiment, the rotating part 2 can rotate about 90° around the mounting shaft 21 to realize the opening or closing of the door. When the door is closed, the cabinet 1 and the door form a washing chamber for washing tableware.

[0048] like Figure 3 As shown, the door opening and closing assembly 3 includes a drive mechanism (31) and a transmission component. The transmission component has a closed-loop structure. Part of the transmission component is fixedly installed on the rotating component (2), and the transmission component is connected to the drive mechanism to drive the rotating component (2) to rotate.

[0049] In this embodiment, the door opening and closing assembly is located on the side wall of the housing 1. The transmission component includes a connecting rod 32 and a first pull rope 33. The connecting rod 32 is driven and connected to the drive mechanism 31, and can move along its length. The two ends of the first pull rope 33 are respectively fixedly installed on the two ends of the connecting rod 32. The first pull rope 33 and the connecting rod 32 together form a closed loop structure, and the first pull rope 33 is partially fixedly installed on the rotating component 2, thereby driving the rotating component 2 to rotate, so as to realize the opening or closing of the door. The tensioning wheel 342 and the first wheel 341 mentioned below are also located on the side wall of the housing, respectively tensioning and guiding the first pull rope 33.

[0050] The drive mechanism 31 includes a second transmission part 311, a first transmission part 312, and a first drive member 313. The first transmission part 312 is disposed on the connecting rod 32 and is connected to the second transmission part 311 in a driving manner. The first drive member 313 is connected to the second transmission part 311 in a driving manner.

[0051] In this embodiment, the first transmission part 312 is a plurality of first teeth arranged at intervals along the length direction of the connecting rod 32, and the plurality of first teeth constitute a rack extending along the length direction of the connecting rod 34. The second transmission part 311 is a first gear that meshes with the first transmission part 312, and the second transmission part 311 is drivenly connected to the first driving member 313, so that the second transmission part 311 can rotate around its axis.

[0052] The first driving component 313 can be a motor. The second transmission part 311 can be directly connected to the output shaft of the first driving component 313 or indirectly connected. For example, the output shaft of the first driving component 313 can be connected to the worm gear 3130, and the worm gear 3130 can directly mesh with the second transmission part 311 or indirectly mesh with it through an intermediate gear.

[0053] The second transmission unit 311 is preferably an overload protection gear, which can refer to the structure of the third gear set 16 in CN202221222219.2 "A sliding door opening state triggering device, sliding door mechanism and dishwasher".

[0054] When the worm 3130 and the second transmission unit 311 are indirectly meshed through an intermediate gear, the intermediate gear 3131 (which can be a worm wheel structure) that meshes directly with the worm can be self-locking or non-self-locking with the worm 3130.

[0055] When the intermediate gear 3131 and the worm 3130, which directly mesh with the worm 3130, are self-locking (with a large self-locking force), there are three possible scenarios:

[0056] (1) When energized, the first driving component 313 works, driving the second transmission part 311 to rotate, and finally driving the connecting rod 32 to move.

[0057] (2) When the power is on, if the user opens the door with external force and the external force is greater than the self-locking force, the first drive component 313 will rotate or rotate slightly under the action of the external force. At this time, the user's intention can be sensed by detecting the rotation direction or speed of the first drive component 313 or each intermediate gear, and the automatic program can be started to perform the opening / closing action.

[0058] (3) When the power is off, the user manually opens the door. When the second transmission part 311 is preferably an overload protection gear, it is achieved by the overload protection gear skipping. When the intermediate gear 3131 and the worm 3130 that mesh directly with the worm 3130 are not self-locking, there is still a self-locking force, but the self-locking force is small. When the second transmission part 311 is preferably an overload protection gear, the overload protection gear will not skip. In the non-self-locking case, the overload protection gear only plays the role of preventing overload. There are also three situations in the non-self-locking state:

[0059] 1) When the power is on and the door is opened without external force, the first driving component 313 works, driving the second transmission part 311 to rotate, which in turn drives the connecting rod 32 to move.

[0060] 2) When the power is on, if the user opens the door with external force and the external force is greater than the self-locking force, the first drive component 313 will rotate under the action of the external force. At this time, the user's intention can be sensed by detecting the rotation direction or speed of the motor or each intermediate gear, and the automatic program can be started to open / close the door.

[0061] 3) When the power is off, if the user opens the door with external force and the external force is greater than the self-locking force, the first driving component 313 will rotate under the action of the external force to open the door.

[0062] When the worm gear 3130 directly meshes with the second transmission part 311, the two can be self-locking or non-self-locking.

[0063] When the worm gear 3130 and the second transmission part 311 are self-locked (the self-locking force is relatively large), there are three possible scenarios:

[0064] (1) When energized, the first driving component 313 works, driving the second transmission part 311 to rotate, and finally driving the connecting rod 32 to move.

[0065] (2) When the power is on, if the user opens the door with external force and the external force is greater than the self-locking force, the first drive member 313 will rotate or rotate slightly under the action of the external force. At this time, the user's intention can be sensed by detecting the rotation direction or speed of the first drive member 313 or the second transmission part 311 (i.e., the overload protection gear), and the automatic program can be started to perform the opening / closing action.

[0066] (3) When the power is off, the user manually opens the door. When the second transmission part 311 is preferably an overload protection gear, it is achieved by the overload protection gear skipping teeth.

[0067] When the worm gear 3130 and the second transmission part 311 are not self-locking, there is still a self-locking force, but the self-locking force is small. When the second transmission part 311 is preferably an overload protection gear, the overload protection gear will not skip teeth. In the non-self-locking case, the overload protection gear only plays a role in preventing overload. There are also three situations in the non-self-locking state:

[0068] 1) When the power is on and the door is opened without external force, the first driving component 313 works, driving the second transmission part 311 to rotate, which in turn drives the connecting rod 32 to move.

[0069] 2) When the power is on, if the user opens the door with external force and the external force is greater than the self-locking force, the first drive component 313 will rotate under the action of the external force. At this time, the user's intention can be sensed by detecting the rotation direction or speed of the first drive component 313 or the second transmission part 311, and the automatic program can be started to open / close the door.

[0070] 3) When the power is off, if the user opens the door with external force and the external force is greater than the self-locking force, the first driving component 313 will rotate under the action of the external force to open the door.

[0071] The first transmission part can also be a threaded structure arranged along the axial direction of the connecting rod 32, and the threaded structure and the connecting rod 32 together form a worm. The second transmission part 311 is a worm wheel that meshes with the worm.

[0072] In summary, the second transmission unit 311 and the first transmission unit 312 can have various transmission cooperation methods, which will not be listed one by one here.

[0073] The transmission component is not limited to the structure of the connecting rod 32 and the first pull rope 33 mentioned above. For example, it can be a rope that is pulled to open and close the door, or the rope can be partially wrapped around the winch and driven by the winch to open and close the door; or the transmission component can be a closed rack and pinion, in which the first wheel 341 mentioned below is a gear that meshes with the rack and pinion, and the drive mechanism drives the gear, and so on.

[0074] The transmission component can have various structural forms. As long as the transmission component is partially fixedly installed on the rotating component 2 and the transmission component is connected to the drive mechanism to form a closed-loop drive path, it can pull the rotating component 2 to rotate and drive the door to deflect back and forth.

[0075] The household appliance also includes a guide assembly for guiding the transmission component. The guide assembly includes a first wheel 341, which is provided on the housing 1, and the transmission component passes around the first wheel 341; or, at least two first wheels 341 are spaced apart on the housing 1, and the transmission component passes around the first wheels 341 sequentially along its length. The first wheel 341 may be a fixed pulley.

[0076] In addition, the household appliance also includes a tensioning wheel 342 and a third elastic element 35 acting on the tensioning wheel 342. The first pull rope 33 of the transmission component passes around the tensioning wheel 342, thereby further keeping the transmission component in a taut state. In this embodiment, the third elastic element 35 is a spring, with one end abutting against the tensioning wheel 342 and the other end fixed relative to the housing 1. The point where the transmission component is connected to the rotating component 2 is called the connection point. As can be seen from the opening and closing process of the door, the movement trajectory of the connection point is an arc. During the opening and closing process, when the connection point moves away from the midpoint of the arc, the transmission component will slacken, and the tensioning wheel 342 can move. The position is determined by the elastic force and tension of the third elastic element 35.

[0077] The pull rope assembly 4 includes a second pull rope 41, a second wheel 42, and a fourth elastic element 43. In this embodiment, the first end of the second pull rope 41 is fixedly installed on the rotating member 2, and the second end of the second pull rope 41 is connected to the housing 1. The fourth elastic element 43 acts on the second pull rope 41, so that the second pull rope 41 maintains the tendency to pull the rotating member 2 taut.

[0078] In this embodiment, the fourth elastic element 43 is a tension spring. During the process of the door rotating from the closed state to the open state, the fourth elastic element 43 gradually tensions. One end of the fourth elastic element 43 is fixedly installed on the housing 1, and the other end is fixedly connected to the second end of the second pull rope 41. That is, the second pull rope 41 is connected to the housing 1 through the tension spring. In this way, the pull rope assembly 4 plays the role of tightening the door to balance the weight of the door, so that opening and closing the door does not require overcoming the weight of the door. It can be operated with very little force, and will not accidentally pinch people's fingers, thus ensuring the safety of automatic opening and closing.

[0079] The arrangement of the second pull rope 41 and the tension spring can also be as follows: the second pull rope 41 is divided into two sections, one of which is connected to the rotating part 2 and the first end of the tension spring at both ends, and the other of which is connected to the housing 1 and the second end of the tension spring at both ends.

[0080] The household appliance also includes a guide structure for changing the direction of the force on the second pull rope 41. The guide structure includes a second wheel 42. A second wheel 42 is provided on the side wall of the housing 1, and the second pull rope 41 passes around the second wheel 42; or, at least two second wheels 42 are spaced apart on the side wall of the housing 1, and the second pull rope 41 passes around the second wheels 42 sequentially along its length. The second wheel 42 can be a fixed pulley.

[0081] like Figure 4 As shown, the rotating member 2 in this embodiment is provided with two hooks 22. One hook 22 is for the first pull rope 33 to be partially wrapped around, and the other hook 22 is for the second pull rope 41 to be partially wrapped around, so as to realize the partial fixed installation of the first pull rope 33 and the second pull rope 41 on the rotating member 2.

[0082] The door opening / closing assembly 3 and the pull cord assembly 4 can be arranged as follows:

[0083] There is one set of door opening and closing assembly 3 and pull rope assembly 4, which are set on the same side or opposite side of the left and right sides of the box body 1.

[0084] Alternatively, there may be one set of door opening and closing assembly 3, located on the left or right side of the housing 1, and two sets of pull rope assembly 4, located on the left and right sides of the housing 1 respectively.

[0085] Alternatively, there are two sets of both the door opening and closing assembly 3 and the pull rope assembly 4, which are respectively set on the left and right sides of the box body 1.

[0086] Alternatively, there may be one set of pull cord assembly 4, located on the left or right side of the housing 1, and two sets of door opening and closing assembly 3, located on the left and right sides of the housing 1 respectively.

[0087] like Figures 5 to 9 As shown, the door lock structure 5 includes a bolt 51, a locking element, an actuation assembly, and a housing 52.

[0088] The latch 51 is fixedly mounted on the top of the door, and the locking element is fixedly mounted on the top of the housing 1. The locking element and the latch 51 are detachably bound together. When the door is closed, the locking element and the latch 51 are bound together; when the door is open, the locking element is disengaged from the latch 51. In this way, when the door opening and closing assembly 3 closes the door, the door lock structure 5 locks the door and the housing 1 relative to each other, ensuring the reliability of the door closing.

[0089] In this embodiment, the box body 52 is located on the top of the box body 1, and the box body 52 is formed by two half shells 52a joined together.

[0090] The locking element includes two locking arms 53 that are arranged opposite each other and extend in the front-rear direction. The rear parts of the locking arms 53 are rotatably mounted in the housing 52 and the axis of rotation extends vertically. The front side wall of the housing 52 is provided with a notch for the front parts of the locking arms 53 to be exposed. A first elastic member 54 is provided in the housing 52 for each locking arm 53. Under the action of the corresponding first elastic member 54, the two locking arms 53 maintain the tendency to rotate towards each other to clamp the locking tongue 51.

[0091] The actuation component is located in the housing 52 and is used to drive the two locking arms 53 to rotate away from each other so that the locking tongue 51 can be inserted between the two locking arms 53 and held by the two locking arms 53.

[0092] The actuation assembly includes a push rod 55 and a drive structure 56 that drives the push rod 55 to move back and forth. The push rod 55 and the drive structure 56 are connected to each other. When the door is closed, the push rod 55 and the latch 51 are vertically offset to prevent the push rod 55 from interfering with the latch 51 when it is inserted between the two locking arms 53. Both locking arms 53 are provided with a stop 550 located on the forward movement path of the push rod 55. In this way, when the push rod 55 moves forward, it will push the locking arm 53 to rotate away from the other locking arm 53.

[0093] The push rod 55 has multiple third teeth 551 arranged sequentially along the front-rear direction. The drive structure 56 includes a third drive member 561 and a third gear 562. The third drive member 561 and the third gear 562 are drivenly connected, and the third gear 562 meshes with the third teeth 551 (the two can mesh directly or indirectly through an intermediate gear). The third drive member 561 can be a motor. The third gear 562 and the output shaft of the third drive member 561 can be directly connected or indirectly connected. For example, the output shaft of the third drive member 561 can be connected to a worm gear, and the worm gear can mesh directly with the third gear 562 or indirectly through an intermediate gear.

[0094] like Figure 7 As shown, the box 52 is equipped with a first detection mechanism to detect whether the top rod 55 has moved into place. Of course, the first detection mechanism may not be provided.

[0095] The first detection mechanism includes a first micro switch 57 disposed in the housing 52. The first micro switch 57 is located on the path of the push rod 55 moving backward. When the push rod 55 triggers the first micro switch 57, the push rod 55 moves to its rear limit position. The forward travel of the push rod 55 can be determined by the magnitude of the stall current of the third driving member 561 when the push rod 55 pushes the stop block 550. For example, when the stall current of the third driving member 561 reaches a set value, the push rod 55 moves forward to its limit position. In this embodiment, the push rod 55 is provided with a protrusion 552, which can abut against the spring 571 of the first micro switch 57.

[0096] The housing 52 is also equipped with a second detection mechanism for detecting whether the locking tongue 51 is locked in place with the locking member. Of course, the second detection mechanism may not be provided.

[0097] like Figure 8 As shown, the housing 52 is also provided with a detection rod 58 extending in the front-back direction. The detection rod 58 maintains a forward movement tendency under the action of the second elastic member 580, and the detection rod 58 can move backward to the part where the locking tongue 51 is constrained by the locking member. A second micro switch 59 is provided on the path of the detection rod 58 moving backward. The detection rod 58 and the second micro switch 59 together constitute the second detection mechanism.

[0098] Specifically in this embodiment, when the locking tongue 51 is inserted between the two locking arms 53, it will abut against the front end of the detection rod 58 and push the detection rod 58 to move backward. When the detection rod 58 moves backward to the state of triggering the second micro switch 59, the locking tongue 51 is in a state of being constrained by the locking member (that is, the locking tongue 51 is in a state of being clamped between the two locking arms 53).

[0099] In this embodiment, the detection rod 58 triggers the second micro switch 59 in the following manner: a trigger rod 581 is provided in the housing 52, the first end of the trigger rod 581 is rotatably mounted in the housing 52 through a vertically extending pin 582, the second end of the trigger rod 581 abuts against the rear end of the detection rod 58, and the middle part of the trigger rod 581 can trigger the contact of the second micro switch 59.

[0100] like Figure 9 As shown, the housing 52 is provided with a limiting structure that restricts the forward movement trajectory of the detection rod 58. In this embodiment, the detection rod 58 is provided with a second limiting block 583, and the housing 52 is provided with a limiting part 521 that abuts against the front wall surface of the second limiting block 583. When the limiting part 521 abuts against the front wall surface of the second limiting block 583, the detection rod 58 cannot continue to move forward. The limiting part 521 is the limiting structure.

[0101] In this embodiment, the second elastic element 580 is a spring extending in the front-back direction, with one end abutting against the second end of the trigger rod 581 and the other end fixed relative to the box 1.

[0102] The drive mechanism 56 can drive the push rod 55 forward to push the stop block 550, causing the two locking arms 53 to rotate away from each other. Then, during the closing process of the door under the action of the door opening and closing assembly 3 and the pull rope assembly 4, the latch 51 can be smoothly inserted between the two locking arms 53. When the latch 51 pushes the detection rod 58 to trigger the second micro switch 59, the drive mechanism 56 drives the push rod 55 to retract, releasing the push on the stop block 550. Then, under the action of the corresponding first elastic element 54, the two locking arms 53 rotate towards each other, clamping the latch 51 and locking the door.

[0103] When the door is opened, the drive mechanism 56 drives the top rod 55 to move forward, the two locking arms 53 rotate away from each other, the locking tongue 51 can disengage from between the two locking arms 53, and then the door is opened under the action of the door opening and closing assembly 3 and the pull rope assembly 4.

[0104] Example 2

[0105] The difference between this embodiment and embodiment 1 is that this embodiment does not include the pull rope assembly 4.

[0106] Example 3

[0107] The difference between this embodiment and embodiment 1 is that this embodiment does not include a door lock structure 5.

[0108] Example 4

[0109] The difference between this embodiment and embodiment 1 is that this embodiment does not include the pull rope assembly 4 and the door lock structure 5.

[0110] Example 5

[0111] The difference between this embodiment and embodiment 1 is that this embodiment does not include the door opening / closing assembly 3 and the pull cord assembly 4.

[0112] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this utility model can be set in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A door opening and closing assembly for household appliances, characterized in that, include Drive mechanism (31); The transmission component is connected to the drive mechanism and has a closed-loop structure. A part of the transmission component is fixedly installed on the rotating part (2) of the door and box (1) connecting the household appliances, so that the transmission component pulls the rotating part (2) to rotate to realize the opening and closing of the door.

2. The door opening and closing assembly according to claim 1, characterized in that: The transmission component includes a connecting rod (32) and a first pull rope (33). The connecting rod (32) is driven and connected to the driving mechanism (31). The connecting rod (32) can move along its length. The two ends of the first pull rope (33) are respectively fixedly installed at the two ends of the connecting rod (32). The first pull rope (33) and the connecting rod (32) together form a closed loop structure, and the first pull rope (33) is partially used to be fixedly installed on the rotating component (2).

3. The door opening and closing assembly according to claim 2, characterized in that: The drive mechanism (31) includes a second transmission part (311), a first transmission part (312), and a first drive member (313). The first transmission part (312) is disposed on the connecting rod (32), and the first transmission part (312) is connected to the second transmission part (311) in a driving connection. The first drive member (313) is connected to the second transmission part (311) in a driving connection.

4. The door opening and closing assembly according to claim 3, characterized in that: The first transmission part (312) consists of a plurality of first teeth arranged at intervals along the length direction of the connecting rod (32), and the plurality of first teeth constitute a rack extending along the length direction of the connecting rod (32). The second transmission part (311) is a first gear that meshes with the first transmission part (312).

5. The door opening and closing assembly according to any one of claims 1 to 4, characterized in that: The household appliance also includes a guide assembly for guiding the transmission components.

6. The door opening and closing assembly according to claim 5, characterized in that: The guiding component includes a first wheel (341), and the housing (1) is provided with a first wheel (341), and the transmission member passes around the first wheel (341); or, the housing (1) is provided with at least two first wheels (341) spaced apart, and the transmission member passes around the first wheel (341) in sequence along its length direction.

7. The door opening and closing assembly according to any one of claims 1 to 4, characterized in that: The household appliance also includes a tensioning wheel (342) and a third elastic element (35) acting on the tensioning wheel (342), with the transmission element bypassing the tensioning wheel (342) to keep the transmission element in a tensioned state.

8. A household appliance, characterized in that: The device includes a housing (1), a door, a rotating component (2), and a door opening assembly as described in any one of claims 1 to 7. The housing (1) has an open front side, the door is located on the front side of the housing (1), the rotating component (2) is fixedly connected to the lower part of the door, and is rotatably mounted on the outer side wall of the lower part of the housing (1) via a mounting shaft (21) extending in the left-right direction, thereby allowing the upper part of the door to flip back and forth.

9. The household appliance according to claim 8, characterized in that: It also includes a door lock structure (5), which includes... Box body (52) is located on top of box body (1); The latch (51) is fixedly installed at the top of the door; A locking element is provided on the top of the housing (1). The locking element includes two locking arms (53) arranged opposite to each other and extending in the front-rear direction. The rear parts of the locking arms (53) are rotatably mounted on the housing (52) and the axis of rotation extends vertically. The front side wall of the housing (52) is provided with a notch for the front part of the locking arms (53) to be exposed. A first elastic element (54) is provided in the housing (52) for each locking arm (53). The two locking arms (53) maintain the tendency to rotate towards each other to clamp the locking tongue (51) under the action of the corresponding first elastic element (54). An actuation assembly is used to drive the two locking arms (53) to rotate away from each other.

10. The household appliance according to claim 9, characterized in that: The actuation assembly includes a push rod (55) and a drive structure (56) for moving the push rod (55) back and forth. The push rod (55) is driven to connect with the drive structure (56). When the door is closed, the push rod (55) and the latch (51) are vertically offset, and both locking arms (53) are provided with a stop (550) located on the forward movement path of the push rod (55).

11. The household appliance according to claim 8, characterized in that: The household appliance in question is a dishwasher.

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