Door lock for household appliance

Abstract

The present invention relates to the technical field of electronic door locks. Provided is a door lock for a household appliance, the door lock comprising a packaging housing, a door hook rotationally mounted on the packaging housing, and a transmission module abutting against the rear end of the door hook, wherein the transmission module comprises an action slider, an elastic positioning element, a transmission assembly and a drive module. In the present invention, the drive module, the transmission assembly and the action slider, which are linked in sequence, are designed, and by means of bidirectional sliding control of the action slider, the door hook is driven to rotate in a preset direction, so as to realize locking and unlocking; the door lock has relatively high durability and reliability, and can operate stably in various environments; moreover, the elastic positioning element mounted to limit the action slider is provided, and when the action slider reaches a specified unlocking position or a specified locking position, the slider is positioned by means of the elastic potential energy of the elastic positioning element, thereby ensuring the stability of locked and unlocked states.

Description

A type of door lock for household appliances Technical Field

[0001] This invention relates to the field of electronic door lock technology, and more particularly to a door lock for household appliances. Background Technology

[0002] An oven is a sealed appliance used for baking food or drying products, and it is divided into household ovens and industrial ovens. Household ovens can be used to process some pasta. Industrial ovens are equipment used in industry to dry products; they can be electric or gas-powered, and are also called baking ovens or drying boxes. They are generally divided into three-control automatic types (timer, temperature control, and power control), temperature-controlled and timer types, and simple types. For most households, a temperature-controlled and timer type is sufficient, as this type has more complete functions and a higher cost-performance ratio.

[0003] Currently, some oven door locks on the market use a one-way push or pull mechanism to lock the slider, thus fixing the door lock hook in a certain position and locking or unlocking the door. Because it is a one-way push or pull, the mechanical stop unlocking mechanism is a one-way reverse unlocking mechanism. Therefore, once the mechanical stop unlocking mechanism is used, it will completely jam the locking slider from the other direction and will not automatically return to its original position. This requires the user or a professional repairman to remove the appliance or door lock for repair, which is difficult and inconvenient.

[0004] Meanwhile, the determination of the door's open / closed state, the determination of the door's locked / unlocked state, and the electrical components of the drive module in common oven door locks are relatively independent, resulting in significant manufacturing and cost waste.

[0005] Furthermore, the traditional oven door lock hook is located on the side of the door. A single-sided lock hook will cause uneven force on the door. When the oven is powered off, the door cannot be opened. In addition, the existing door lock structure is complex and costly. Technical issues

[0006] This invention provides a door lock for household appliances, which solves the technical problems of existing door lock structures lacking emergency unlocking functions and mechanical emergency unlocking structures failing to automatically reset, resulting in a poor user experience. Technical solutions

[0007] To address the above technical problems, this invention provides a household appliance door lock, comprising a housing, a door hook rotatably mounted on the housing, and a transmission module abutting against the rear end of the door hook. The transmission module includes an actuating slider, an elastic positioning element, a transmission assembly, and a drive module. The front end of the actuating slider abuts against the rear end of the door hook, and its rear end is connected to the transmission assembly. The transmission assembly is mechanically connected to the drive module. The elastic positioning element is mounted on the housing and is positioned relative to the actuating slider.

[0008] The drive module is activated to drive the transmission module to work, pushing the action slider to slide to the front end. The action slider lifts the rear end of the door hook. At this time, the elastic positioning element deforms and pushes the action slider to move backward, so that the door hook rotates downward to lock and complete the locking action.

[0009] The drive module is activated to drive the transmission module to work, pushing the action slider to slide to the rear end. After the rear end of the door hook is disengaged from the support of the action slider, it is lifted upward. At this time, the elastic positioning element deforms and pushes the action slider forward, causing the door hook to rotate upward to unlock and remain in place.

[0010] This basic design incorporates a sequentially linked drive module, transmission components, and actuating slider. By controlling the bidirectional sliding of the actuating slider, the door hook is driven to rotate in a preset direction to achieve unlocking and unlocking. The door lock has high durability and reliability, and can work stably in various environments. At the same time, an elastic positioning element is installed with the actuating slider for limit installation. When the actuating slider reaches the designated unlocking position or the designated locking position, the elastic potential energy of the elastic positioning element is used to position the slider, thereby ensuring the stability of the locking and unlocking states.

[0011] In a further embodiment, the motion slider includes at least a guide portion, a positioning portion, and a connecting portion connected sequentially from front to back. The guide portion abuts against the rear end of the door hook, the positioning portion is movably mounted with the elastic positioning element, and the connecting portion is connected to the transmission assembly.

[0012] The front end of the guide is a horizontal unlocking surface, the middle part is a sliding ramp formed by raising it backward, and the rear end is a horizontal locking surface that extends from the end of the sliding ramp. The horizontal height of the locking surface is higher than the horizontal height of the unlocking surface.

[0013] When the sliding slider moves to the front end, it pushes the door hook to rotate, so that the rear end of the door hook transitions from the unlocking surface to the locking surface along the sliding ramp, causing the rear end of the door hook to be lifted and locked on the locking surface. At this time, the front end of the door hook snaps down to complete the locking action.

[0014] This innovative design features a guide section, a positioning section, and a connecting section connected sequentially from front to back. The connecting section receives power from the drive module, which in turn drives the guide section to lift or release the door hook. By switching the horizontal height of the connection surface between the guide section and the door hook, the door hook rotates to a predetermined position to lock or unlock. At this time, the positioning section is in a stable state under the elastic positioning of the elastic positioning element, thus ensuring that the guide section and the door hook are in a relatively stable state, maintaining the locked or unlocked state, providing stronger locking force, and increasing the safety of household appliances.

[0015] In a further embodiment, the bottom of the positioning part is a connecting plate, and both ends are respectively provided with arc-shaped walls that arch towards the center to form a double-moon-shaped arc groove structure; the two ends of the elastic positioning element are fixed to the encapsulation housing, and the middle part is laterally embedded in the arc groove structure. Under the guidance of the arc-shaped wall on one side, it deforms and abuts against the arc-shaped wall on the other side to restrict the sliding of the action slider and keep the door hook in the unlocked or locked state.

[0016] The connecting part has a through hole in the middle to accommodate the transmission component. The edge of the through hole has protruding locking teeth and unlocking teeth. The locking teeth and unlocking teeth are spatially limited with the transmission component. When the transmission component rotates to be limited by the locking teeth, the locking teeth are pushed by force, causing the entire sliding block to move forward to perform unlocking. When the transmission component rotates to be limited by the unlocking teeth, the unlocking teeth are pushed by force, causing the entire sliding block to move backward to perform locking.

[0017] This solution uses a double-moon-shaped arc groove structure as a positioning part to cooperate with the elastic positioning element. The elastic positioning element is embedded and installed in a compressed state. When the sliding block slides to the locked or unlocked state, one side arc wall of the positioning part guides the elastic positioning element to deform in a specific direction. As a result, the deformation of the elastic positioning element compresses the other side arc wall, so that the positioning part and the entire sliding block are in a blocked positioning state, thereby maintaining the locked or unlocked state. Due to the state switching of the linked elastic element, locking and unlocking are easier.

[0018] A through hole is provided in the middle of the connecting part to house the transmission component. Furthermore, raised locking and unlocking teeth are provided on the edge of the through hole. When the transmission component rotates to the limit with the locking teeth, it pushes the locking teeth and the entire sliding block to move backward to perform locking. When the transmission component rotates to the limit with the unlocking teeth, it pushes the unlocking teeth and the entire sliding block to move forward to perform unlocking. This simplifies the triggering of locking and unlocking actions, further reduces the power of the drive module during locking and unlocking, and achieves the effect of energy saving and emission reduction.

[0019] In a further embodiment, an emergency unlocking push rod connected to the action slider is also included. One end of the emergency unlocking push rod extends forward out of the encapsulation housing, and the other end is connected to the guide portion rearward. A first limiting block is provided at the front end of the emergency unlocking push rod.

[0020] This solution adds an emergency unlocking push rod connected to the action slider. One end of the emergency unlocking push rod extends forward out of the housing for emergency operation by the user, while the other end points towards the guide of the action slider. By manually pushing the emergency unlocking push rod, the action slider is advanced, causing the door hook to slide from the locking surface to the unlocking surface, thus achieving emergency unlocking. The operation is convenient and the structure is simple, greatly facilitating emergency operations for users and professionals. When the door lock is powered on again, the system can self-recover through the coordinated work of the drive module and the connecting part.

[0021] In a further embodiment, a motion detection module is also included, the motion detection module including a first micro switch, the actuating reed of the first micro switch pointing towards the motion slider;

[0022] The motion slider also includes a detection part disposed between the guide part and the positioning part, wherein the front end of the detection part is concave downward, the middle part is inclined backward and rises, and the rear end extends horizontally.

[0023] The sliding block moves forward, causing the actuating spring of the first micro switch to be pressed by the rear end of the detection unit, and the first micro switch indicates that it is currently in the unlocked state; the sliding block moves backward, causing the actuating spring of the first micro switch to enter the front end along the inclined surface in the middle of the detection unit, and then the actuating spring of the first micro switch is released from the pressure of the detection unit, and the first micro switch indicates that it is currently in the locked state.

[0024] This solution sets up an action detection module based on a first micro switch, with the action spring of the first micro switch pointing towards the action slider, and a detection part that cooperates with the first micro switch. Since the relative states of the detection part and the action spring of the first micro switch are released and pressed respectively when the action slider is locked and unlocked, the current door lock status can be directly determined by obtaining the output of the first micro switch, thus realizing intelligent control.

[0025] In a further embodiment, a door detection module is also included, comprising a sensing slider, a sensing elastic element, and a second micro switch; one end of the sensing slider is positioned outside the encapsulation housing corresponding to the door latch, and the other end is fitted with the sensing elastic element and points towards the lower part of the second micro switch, with the actuating spring of the second micro switch pointing downwards towards the sensing slider; one end of the sensing elastic element is limited by the sensing slider, and the other end is limited by the encapsulation housing, so as to provide the sensing slider with an outward popping force through elastic deformation;

[0026] When the door latch pushes the sensing slider backward, it points to the second micro switch. The actuating spring of the second micro switch is pressed, and the second micro switch indicates that the door is currently in the closed state.

[0027] The door latch moves away from the sensing slider, and the sensing slider moves forward under the action of the sensing slider. The actuating spring of the second micro switch is released from the pressure of the sensing slider, and the second micro switch indicates that the door is currently in the open state.

[0028] This solution incorporates a second micro switch, a sensing slider, and a sensing elastic element to implement a door opening / closing detection mechanism. Through automated monitoring, the opening and closing status of the cabinet door can be monitored in real time, reducing errors caused by human operation and ensuring accurate recording and management of the usage status of household appliances.

[0029] In a further embodiment, the front end of the sensing slider is bent downward to form a stop that cooperates with the door latch, the middle part is a mounting part that is slidably connected to the encapsulation housing, and the rear end is set as a horizontal bar pointing to the second micro switch; the front end of the mounting part is first bent horizontally, the middle part extends backward, and the rear end extends upward to slide into the encapsulation housing;

[0030] The mounting part slides along a predetermined trajectory on the encapsulation housing, thereby causing the crossbar to press against or move away from the actuating spring of the second micro switch.

[0031] In this design, the front end of the sensing slider is bent downwards and has a stop at the end that engages with the door latch for precise positioning of the door latch; at the same time, the front end of the mounting part is first bent horizontally to limit the sensing slider from falling out of the encapsulation housing, and the rear end of the mounting part extends upwards and slides into the encapsulation housing to guide the sensing slider to slide along a predetermined trajectory, thereby improving the stability of the device.

[0032] In a further embodiment, the front end of the door hook is bent downward to form a latch, the middle part is provided with a rotating shaft extending to both sides, and the rear end extends backward to connect with the action slider. The rotating shaft is rotatably mounted on the encapsulation housing by a torsion spring.

[0033] The door hook in this design rotates around a pivot. The rotating door hook lock design is simple, easy to operate, and suitable for occasions where doors need to be opened and closed frequently.

[0034] In a further embodiment, the transmission component includes at least a transmission gear and an actuating gear. The transmission gear is rotatably connected to the drive module and meshes with the actuating gear. The actuating gear is located in the through hole of the connecting part and has outwardly protruding teeth at its lower part. The protruding teeth are spatially limited by the locking teeth and unlocking teeth.

[0035] This solution is based on conventional gear transmission design. It features outwardly protruding teeth on the moving gear that mates with the connecting part. By using the space limit between the protruding teeth and the locking and unlocking teeth, the connecting part and the entire moving slider can be moved back and forth to achieve locking and unlocking. The structure is simple and the power consumption is low.

[0036] In a further embodiment, the packaging housing includes an upper cover and a lower cover that fit together.

[0037] The elastic positioning element is horizontally installed in the shaft holes on both sides of the front end of the upper cover and in the middle inner side. The rotating shaft of the door hook is rotatably installed in the shaft hole through a torsion spring. The top surface of the inner cavity of the upper cover is also provided with an upwardly recessed horizontal sliding groove, in which the sensing slider is embedded.

[0038] A support platform is provided at the bottom opening of the lower cover, and the sensing slider is supported on the support platform; an inwardly arched limiting wall is provided on one side of the lower cover, and the limiting wall is used to restrict the guide part from sliding inward and stopping it in the unlocked state. Beneficial effects

[0039] This design features a sealed housing with upper and lower covers for device assembly, making the door lock an integrated unit that is easy to install and effectively protects the internal parts of the door lock, thereby extending its service life. Attached Figure Description

[0040] Figure 1 is an exploded view of a household appliance door lock provided in Embodiment 1 of the present invention;

[0041] Figure 2 is an assembly diagram of Figure 1 provided in Embodiment 1 of the present invention;

[0042] Figure 3 is a rear view of Figure 2 provided in Embodiment 1 of the present invention;

[0043] Figure 4 is a three-dimensional structural diagram of the motion slider of Figure 1 provided in Embodiment 1 of the present invention;

[0044] Figure 5 is a schematic diagram of the unlocked state provided in Embodiment 1 of the present invention;

[0045] Figure 6 is a schematic diagram of the locked state provided in Embodiment 1 of the present invention;

[0046] Figure 7 is a partial structural schematic diagram provided in Embodiment 1 of the present invention;

[0047] Figure 8 is a three-dimensional structural diagram of the connecting part and the moving gear provided in Embodiment 1 of the present invention;

[0048] Figure 9 is a three-dimensional structural diagram of the upper cover in Figure 1 provided in Embodiment 1 of the present invention;

[0049] Figure 10 is a three-dimensional structural diagram of a door lock for unlocking and locking a household appliance provided in Embodiment 2 of the present invention;

[0050] Figure 11 is a three-dimensional structural diagram of the door hook and sensing slider in Figure 10 provided in Embodiment 2 of the present invention;

[0051] Figure 12 is a schematic diagram of the unlocked state provided in Embodiment 2 of the present invention;

[0052] Figure 13 is a schematic diagram of the locked state provided in Embodiment 2 of the present invention;

[0053] Figure 14 is a schematic diagram of the electrical connection of the driving module B, the first micro switch A1, and the second micro switch 63 in the integrated circuit board provided in Embodiments 1 and 2 of the present invention.

[0054] Figure 15 is a schematic diagram of the electrical connection of the first micro switch A1 and the second micro switch 63 sharing a common live wire or neutral wire provided in embodiments 1 and 2 of the present invention.

[0055] Among them: motion detection module A; drive module B; integrated circuit board C; torsion spring D;

[0056] Door hook 1, rotating shaft 11; actuating slider 2, guide part 21, detection part 22, positioning part 23, connecting part 24; transmission assembly 3, transmission gear 31, actuating gear 32; elastic positioning element 4; emergency unlocking push rod 5, first limit block 51; door detection module 6, sensing slider 61, sensing elastic element 62, second micro switch 63; upper cover 7, shaft hole 71, horizontal slide groove 72, first buckle 73, second buckle 74, third buckle 75; lower cover 8, support platform 81, limiting wall 82, first locking position 83, second locking position 84, third locking position 85;

[0057] Unlocking surface 211, sliding ramp 212, locking surface 213;

[0058] Connecting plate 231, curved wall 232;

[0059] Through hole 241, locking tooth 242, unlocking tooth 243;

[0060] 321 protruding teeth;

[0061] Gear position 611, mounting part 612, crossbar 613; first micro switch A1. Detailed Implementation

[0062] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. The embodiments are given for illustrative purposes only and should not be construed as limiting the present invention. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention, because many changes can be made to the present invention without departing from the spirit and scope of the present invention. Example 1

[0063] This invention provides a household appliance door lock, as shown in Figures 1-9. In this embodiment, it includes a housing, a door hook 1 rotatably mounted on the housing, and a transmission module that abuts against the rear end of the door hook 1. The transmission module includes an actuating slider 2, an elastic positioning element 4, a transmission assembly 3, and a drive module B. The front end of the actuating slider 2 abuts against the rear end of the door hook 1, and its rear end is connected to the transmission assembly 3. The transmission assembly 3 is mechanically connected to the drive module B. The elastic positioning element 4 is mounted on the housing and is limited in position to the actuating slider 2.

[0064] Referring to Figures 5 and 6, the drive module B is activated to drive the transmission module to work, pushing the action slider 2 to slide to the front end. The action slider 2 lifts the rear end of the door hook 1. At this time, the elastic positioning element 4 deforms and pushes the action slider 2 to move backward, so that the door hook 1 rotates downward to lock and complete the locking action.

[0065] When the drive module B is activated, the transmission module is driven to work, pushing the action slider 2 to slide to the rear end. After the rear end of the door hook 1 is disengaged from the support of the action slider 2, it is lifted upward. At this time, the elastic positioning element 4 deforms and pushes the action slider 2 forward, so that the door hook 1 rotates upward to unlock and remain in place.

[0066] In this embodiment, an integrated circuit board C is also included. The integrated circuit board C is electrically connected to the drive module B, the first micro switch A1, and the second micro switch 63, and is used to issue lock and unlock commands, as well as to collect the lock, unlock, open, and close status.

[0067] The drive module B includes, but is not limited to, an electromagnetic coil and a wax motor.

[0068] In this embodiment, referring to Figure 14, the second micro switch 63, the first micro switch A1, and the circuit portion of the drive module B can be integrated onto a single printed circuit board C as needed, so as to facilitate circuit connection for household appliances.

[0069] Preferably, the integrated circuit board C in this embodiment is equipped with a door lock security mode. Specifically, when the second micro switch 63 is not triggered, that is, when the door of the household appliance is not closed, even if the first micro switch A1 is accidentally triggered or when it is triggered, human error causes the door lock to be in a locked state, the household appliance cannot start working, which has a higher security level.

[0070] Furthermore, referring to Figure 15, based on a low-cost setup, the first micro switch A1 and the second micro switch 63 share a common live wire or neutral wire, thereby greatly saving manufacturing and production costs.

[0071] In this embodiment, referring to Figure 4, the motion slider 2 includes at least a guide part 21, a positioning part 23 and a connecting part 24 connected sequentially from front to back. The guide part 21 abuts against the rear end of the door hook 1, the elastic positioning element 4 is movably mounted on the positioning part 23, and the connecting part 24 is connected to the transmission assembly 3.

[0072] The front end of the guide part 21 is a horizontal unlocking surface 211, the middle part is a sliding inclined surface 212 formed by raising it backward, and the rear end is a horizontal locking surface 213 extending from the end of the sliding inclined surface 212. The horizontal height of the locking surface 213 is higher than the horizontal height of the unlocking surface 211.

[0073] When the sliding slider 2 slides to the front end, it pushes the door hook 1 to rotate, so that the rear end of the door hook 1 transitions from the unlocking surface 211 along the sliding slope 212 to the locking surface 213, so that the rear end of the door hook 1 is lifted and locked on the locking surface 213, and at this time the front end of the door hook 1 snaps down to complete the locking action.

[0074] This embodiment creatively sets up a guide part 21, a positioning part 23, and a connecting part 24 connected sequentially from front to back. The connecting part 24 receives power transmission from the drive module B, thereby driving the guide part 21 to lift or release the door hook 1. By switching the horizontal height of the connection surface between the guide part 21 and the door hook 1, the door hook 1 is rotated to a predetermined position to complete locking or unlocking. At this time, the positioning part 23 is in a stable state under the elastic positioning of the elastic positioning element 4, thereby ensuring that the guide part 21 and the door hook 1 are in a relatively stable state, maintaining the locked or unlocked state, providing a stronger locking force, and increasing the safety of household appliances.

[0075] In this embodiment, the bottom of the positioning part 23 is a connecting plate 231, and both ends are respectively provided with arc-shaped walls 232 arched towards the center to form a double-moon-shaped arc groove structure; the two ends of the elastic positioning element 4 are fixed to the encapsulation housing, and the middle part is laterally embedded in the arc groove structure. Under the guidance of the arc-shaped wall 232 on one side, it deforms and abuts against the arc-shaped wall 232 on the other side to restrict the sliding of the action slider 2 and keep the door hook 1 in the unlocked or locked state;

[0076] The connecting part 24 has a through hole 241 in the middle to accommodate the transmission component 3. The edge of the through hole 241 has protruding locking teeth 242 and unlocking teeth 243. The locking teeth 242 and unlocking teeth 243 are spatially limited with the transmission component 3. When the transmission component 3 rotates to be limited by the locking teeth 242, the locking teeth 242 are pushed by force, causing the motion slider 2 to move forward as a whole to perform unlocking. When the transmission component 3 rotates to be limited by the unlocking teeth 243, the unlocking teeth 243 are pushed by force, causing the motion slider 2 to move backward as a whole to perform locking.

[0077] Specifically, the locking tooth 242 is located at the front end of the through hole 241, with its tooth surface pointing towards the rear end of the through hole 241. When the transmission component 3 (i.e., the protruding tooth 321 on the action gear 32) rotates to contact the tooth surface of the locking tooth 242, the action slider 2 will be pushed forward due to the presence of a limit. When the rear end of the door hook 1 is lifted and locked on the locking surface 213, the locking tooth 242 moves forward and disengages from the limit of the transmission component 3, and the action slider 2 stops sliding.

[0078] The unlocking tooth 243 is located at the rear end of the through hole 241, with its tooth surface pointing towards the front end of the through hole 241. When the transmission component 3 (i.e., the protruding tooth 321 on the action gear 32) rotates to contact the tooth surface of the unlocking tooth 243, the action slider 2 will be pushed backward due to the limit. When the rear end of the door hook 1 is released to the unlocking surface 211, the unlocking tooth 243 retracts and disengages from the limit of the transmission component 3, and the action slider 2 stops sliding.

[0079] In this embodiment, a double-moon-shaped arc groove structure is set as the positioning part 23 to cooperate with the elastic positioning element 4. The elastic positioning element 4 is embedded and installed in a compressed state. When the action slider 2 slides to the locked or unlocked state, one side arc wall 232 of the positioning part 23 guides the elastic positioning element 4 to deform in a specific direction. As a result, the elastic positioning element 4 deforms and squeezes the other side arc wall 232, so that the positioning part 23 and the entire action slider 2 are in a blocked positioning state, thereby maintaining the locked or unlocked state. Due to the state switching of the linkage elastic element, locking and unlocking are easier.

[0080] A through hole 241 is provided in the middle of the connecting part 24 to house the transmission component 3. Furthermore, a raised locking tooth 242 and an unlocking tooth 243 are provided on the edge of the through hole 241. When the transmission component 3 rotates to the limit with the locking tooth 242, it pushes the locking tooth 242 and the entire sliding block 2 to move backward to perform locking. When the transmission component 3 rotates to the limit with the unlocking tooth 243, it pushes the unlocking tooth 243 and the entire sliding block 2 to move forward to perform unlocking. This simplifies the triggering of locking and unlocking actions, further reduces the power of the drive module B during locking and unlocking, and achieves the effect of energy saving and emission reduction.

[0081] In this embodiment, an emergency unlocking push rod 5 connected to the action slider 2 is also included. One end of the emergency unlocking push rod 5 extends forward out of the encapsulation housing, and the other end is connected to the guide portion 21. A first limiting block 51 is provided at the front end of the emergency unlocking push rod 5.

[0082] The first limiting block 51 can not only provide an operating position for the user, but also prevent the emergency unlocking push rod 5 from falling into the encapsulation housing.

[0083] The emergency unlocking push rod 5 can be configured as an integrated structure with the action slider 2 or as an independent structure from the action slider 2, depending on the requirements. This embodiment does not impose any restrictions.

[0084] This embodiment adds an emergency unlocking push rod 5 connected to the action slider 2. One end of the emergency unlocking push rod 5 extends forward out of the housing for emergency operation by the user, and the other end points to the guide part 21 of the action slider 2. By manually pushing the emergency unlocking push rod 5 to advance the action slider 2, the door hook 1 slides from the locking surface 213 to the unlocking surface 211, realizing emergency unlocking. It is convenient to operate and has a simple structure, which greatly facilitates emergency operation for users and professionals. When the door lock is powered on again, the system can self-recover through the coordinated work of the drive module B and the connection part 24.

[0085] In this embodiment, a motion detection module A is also included. The motion detection module A includes a first micro switch A1, and the actuating reed of the first micro switch A1 points to the motion slider 2.

[0086] The motion slider 2 also includes a detection part 22 disposed between the guide part 21 and the positioning part 23. The front end of the detection part 22 is concave downward, the middle part is inclined backward and rises, and the rear end extends horizontally.

[0087] The sliding block 2 moves forward, causing the actuating spring of the first micro switch A1 to be pressed by the rear end of the detection unit 22, and the first micro switch A1 indicates that it is currently in the unlocked state; the sliding block 2 moves backward, causing the actuating spring of the first micro switch A1 to enter the front end along the inclined surface in the middle of the detection unit 22, and then the actuating spring of the first micro switch A1 is released from the pressure of the detection unit 22, and the first micro switch A1 indicates that it is currently in the locked state.

[0088] In this embodiment, an action detection module A based on a first micro switch A1 is set up, with the action spring of the first micro switch A1 pointing towards the action slider 2. At the same time, a detection part 22 that cooperates with the first micro switch A1 is also set up. Since the relative states of the detection part 22 and the action spring of the first micro switch A1 are released and pressed respectively when the action slider 2 is locked and unlocked, the current door lock status can be directly determined by obtaining the output of the first micro switch A1, thereby realizing intelligent control.

[0089] In this embodiment, a door detection module 6 is also included. The door detection module 6 includes a sensing slider 61, a sensing elastic element 62, and a second micro switch 63. One end of the sensing slider 61 is placed outside the encapsulation housing corresponding to the door latch, and the other end is fitted with the sensing elastic element 62 and points towards the lower part of the second micro switch 63. The actuating spring of the second micro switch 63 points downward towards the sensing slider 61. One end of the sensing elastic element 62 is limited by the sensing slider 61, and the other end is limited by the encapsulation housing, so as to give the sensing slider 61 an outward popping force through elastic deformation.

[0090] When the door latch pushes the sensing slider 61 backward, it points to the second micro switch 63. The actuating spring of the second micro switch 63 is pressed, and the second micro switch 63 indicates that the door is currently in the closed state.

[0091] The door latch moves away from the sensing slider 61, and the sensing slider 61 moves forward under the action of the sensing slider 61. The actuating spring of the second micro switch 63 is released from the pressure of the sensing slider 61, and the second micro switch 63 indicates that the door is currently in the open state.

[0092] This embodiment uses a second micro switch 63, a sensing slider 61, and a sensing elastic element 62 to implement a door opening / closing detection mechanism. Through automated monitoring, the opening and closing status of the cabinet door can be monitored in real time, which can reduce errors caused by human operation and ensure accurate recording and management of the usage status of household appliances.

[0093] Among them, the elastic positioning element 4 and the sensing elastic element 62 are preferably springs.

[0094] In this embodiment, the front end of the sensing slider 61 is bent downward to form a stop 611 that cooperates with the door latch, the middle part is a mounting part 612 that is slidably connected to the encapsulation housing, and the rear end is set as a crossbar 613 pointing to the second micro switch 63; the front end of the mounting part 612 is first bent horizontally, the middle part extends backward, and the rear end extends upward to slide into the encapsulation housing;

[0095] The mounting part 612 slides along a predetermined trajectory on the encapsulation housing, thereby causing the crossbar 613 to press against or move away from the actuating spring of the second micro switch 63.

[0096] See Figure 1. For example, gear 611 has a U-shaped structure.

[0097] In this embodiment, the front end of the sensing slider is bent downward and a stop 611 is provided at the end to engage with the door latch for precise positioning of the door latch; at the same time, the front end of the mounting part 612 is first bent horizontally to limit the horizontal movement and prevent the sensing slider 61 from coming out of the encapsulation housing, and the rear end of the mounting part 612 extends upward and slides into the encapsulation housing to guide the sensing slider 61 to slide along a predetermined trajectory, thereby improving the stability of the device.

[0098] In this embodiment, the front end of the door hook 1 is bent downward to form a latch, the middle part is provided with a rotating shaft 11 extending to both sides, and the rear end extends backward to connect with the action slider 2. The rotating shaft 11 is rotatably mounted on the encapsulation housing by a torsion spring D.

[0099] In this embodiment, the door hook 1 rotates around the pivot 11. The rotating door hook 1 has a simple door lock design, is easy to operate, and is suitable for occasions where the door needs to be opened and closed frequently.

[0100] In this embodiment, referring to Figure 8, the transmission component 3 includes at least a transmission gear 31 and an actuating gear 32. The transmission gear 31 is rotatably connected to the drive module B and meshes with the actuating gear 32. The actuating gear 32 is located in the through hole 241 of the connecting part 24, and its lower part is provided with outwardly protruding teeth 321. The protruding teeth 321 are spatially limited with the locking teeth 242 and the unlocking teeth 243.

[0101] This embodiment is based on a conventional gear transmission design. The actuating gear 32 that cooperates with the connecting part 24 is provided with outward protruding teeth 321. By using the space limit of the teeth 321, the locking teeth 242 and the unlocking teeth 243, the connecting part 24 and the entire actuating slider 2 can be pushed to move back and forth to achieve locking and unlocking. The structure is simple and the power consumption is low.

[0102] In this embodiment, the encapsulation housing includes an upper cover 7 and a lower cover 8 that fit together.

[0103] The elastic positioning element 4 is installed laterally on the shaft holes 71 on both sides of the front end of the upper cover 7 and on the inner side of the middle. The rotating shaft 11 of the door hook 1 is rotatably installed in the shaft hole 71 through the torsion spring D. The top surface of the inner cavity of the upper cover 7 is also provided with an upwardly recessed horizontal slide groove 72, and the sensing slider 61 is embedded in the horizontal slide groove 72.

[0104] The bottom opening of the lower cover 8 is provided with a support platform 81, on which the sensing slider 61 is supported; a limiting wall 82 that arches inward is provided on one side of the lower cover 8, which is used to restrict the guide part 21 from sliding inward and stop it in the unlocked state.

[0105] This embodiment uses an eight-part encapsulation shell with upper and lower covers for device assembly, making the door lock an integrated unit that is easy to install and can effectively protect the internal parts of the door lock, thereby extending the service life of the door lock.

[0106] Referring to Figure 9, the upper cover 7 has a first buckle 73 on both sides of the front end, a second buckle 74 on the inner side of the middle, and a third buckle 75 on the outer side of the rear end; the main body of the first buckle 73 is a vertical plate extending downward, and the bottom of the outer side of the vertical plate has an outward protruding buckle; the second buckle 74 and the third buckle 75 are both U-shaped buckles extending downward.

[0107] The top front end of the lower cover 8 opens downward to form a first locking position 83 that engages with the first buckle 73. The middle inner side wall has a horizontal lateral protrusion that forms a second locking position 84 that engages with the second buckle 74. The rear outer side wall has an outward protrusion that forms a third locking position 85 that engages with the third buckle 75.

[0108] Among them, the first buckle 73 and the first locking position 83, the second buckle 74 and the second locking position 84, and the third buckle 75 and the third locking position 85 are divided into three different locking forms. Through multiple internal and external locking, the installation stability of the upper cover 7 and the lower cover 8 can be improved.

[0109] In this embodiment of the invention, a drive module B, a transmission component 3, and an action slider 2 are designed to be linked in sequence. By controlling the bidirectional sliding of the action slider 2, the door hook 1 is driven to rotate in a preset direction to achieve unlocking and unlocking. The door lock has high durability and reliability and can work stably in various environments. At the same time, an elastic positioning element 4 is set and installed with the action slider 2 for limiting. When the action slider 2 reaches the specified unlocking position or the specified locking position, the slider is positioned by the elastic potential energy of the elastic positioning element 4, thereby ensuring the stability of the locking and unlocking states. Example 2

[0110] The present invention provides a household appliance door lock, as shown in Figures 10-13. In this embodiment, the difference between this embodiment and embodiment 1 is the structure of the door hook 1 and the sensing slider 61.

[0111] Referring to Figure 11, one end of the door hook 1 is a plate with a hook, and the other end is a support block connected to the action slider 2; the stop 611 is a bent plate.

[0112] In this embodiment, the corresponding door hook 1 and sensing slider 61 can be set according to the actual locking structure of the door lock and the door. This embodiment does not impose any restrictions.

[0113] In Figure 10, Figure I and Figure II show the door lock in the unlocked and locked states, respectively.

[0114] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A door lock for household appliances, characterized in that: The device includes a housing, a door hook rotatably mounted on the housing, and a transmission module that abuts against the rear end of the door hook. The transmission module includes an actuating slider, an elastic positioning element, a transmission assembly, and a drive module. The front end of the actuating slider abuts against the rear end of the door hook, and its rear end is connected to the transmission assembly. The transmission assembly is mechanically connected to the drive module. The elastic positioning element is mounted on the housing and is positioned relative to the actuating slider. The drive module is activated to drive the transmission module to work, pushing the action slider to slide to the front end. The action slider lifts the rear end of the door hook. At this time, the elastic positioning element deforms and pushes the action slider to move backward, so that the door hook rotates downward to lock and complete the locking action. The drive module is activated to drive the transmission module to work, pushing the action slider to slide to the rear end. After the rear end of the door hook is disengaged from the support of the action slider, it is lifted upward. At this time, the elastic positioning element deforms and pushes the action slider forward, causing the door hook to rotate upward to unlock and remain in place.

2. A household appliance door lock as described in claim 1, characterized in that: The motion slider includes at least a guide part, a positioning part, and a connecting part connected sequentially from front to back. The guide part abuts against the rear end of the door hook, the positioning part is movably mounted with the elastic positioning element, and the connecting part is connected to the transmission assembly. The front end of the guide is a horizontal unlocking surface, the middle part is a sliding ramp formed by raising it backward, and the rear end is a horizontal locking surface that extends from the end of the sliding ramp. The horizontal height of the locking surface is higher than the horizontal height of the unlocking surface. When the sliding slider moves to the front end, it pushes the door hook to rotate, so that the rear end of the door hook transitions from the unlocking surface to the locking surface along the sliding ramp, causing the rear end of the door hook to be lifted and locked on the locking surface. At this time, the front end of the door hook snaps down to complete the locking action.

3. A door lock for a household appliance as described in claim 2, characterized in that: The bottom of the positioning part is a connecting plate, and both ends are respectively provided with arc-shaped walls that arch towards the center to form a double-moon-shaped arc groove structure; the two ends of the elastic positioning element are fixed to the encapsulation housing, and the middle part is laterally embedded in the arc groove structure. Under the guidance of the arc-shaped wall on one side, it deforms and abuts against the arc-shaped wall on the other side to restrict the sliding of the action slider and keep the door hook in the unlocked or locked state. The connecting part has a through hole in the middle to accommodate the transmission component. The edge of the through hole has protruding locking teeth and unlocking teeth. The locking teeth and unlocking teeth are spatially limited with the transmission component. When the transmission component rotates to be limited by the locking teeth, the locking teeth are pushed by force, causing the entire sliding block to move forward to perform unlocking. When the transmission component rotates to be limited by the unlocking teeth, the unlocking teeth are pushed by force, causing the entire sliding block to move backward to perform locking.

4. A door lock for a household appliance as described in claim 3, characterized in that: It also includes an emergency unlocking push rod connected to the action slider, one end of which extends forward out of the encapsulation housing, and the other end which connects to the guide portion; the front end of the emergency unlocking push rod is provided with a first limiting block.

5. A door lock for a household appliance as described in claim 4, characterized in that: It also includes a motion detection module, which includes a first micro switch, wherein the actuating reed of the first micro switch points to the motion slider; The motion slider also includes a detection part disposed between the guide part and the positioning part, wherein the front end of the detection part is concave downward, the middle part is inclined backward and rises, and the rear end extends horizontally. The sliding block moves forward, causing the actuating spring of the first micro switch to be pressed by the rear end of the detection unit, and the first micro switch indicates that it is currently in the unlocked state; the sliding block moves backward, causing the actuating spring of the first micro switch to enter the front end along the inclined surface in the middle of the detection unit, and then the actuating spring of the first micro switch is released from the pressure of the detection unit, and the first micro switch indicates that it is currently in the locked state.

6. A door lock for a household appliance as described in claim 5, characterized in that: It also includes a door detection module, which includes a sensing slider, a sensing elastic element, and a second micro switch. One end of the sensing slider is placed outside the encapsulation housing corresponding to the door latch, and the other end is fitted with the sensing elastic element and points towards the lower part of the second micro switch. The actuating spring of the second micro switch points downward towards the sensing slider. One end of the sensing elastic element is limited by the sensing slider, and the other end is limited by the encapsulation housing, so as to give the sensing slider an outward popping force through elastic deformation. When the door latch pushes the sensing slider backward, it points to the second micro switch. The actuating spring of the second micro switch is pressed, and the second micro switch indicates that the door is currently in the closed state. The door latch moves away from the sensing slider, and the sensing slider moves forward under the action of the sensing slider. The actuating spring of the second micro switch is released from the pressure of the sensing slider, and the second micro switch indicates that the door is currently in the open state.

7. A door lock for a household appliance as described in claim 6, characterized in that: The sensing slider has its front end bent downward to form a stop that engages with the door latch, its middle part is a mounting part that slides with the encapsulation housing, and its rear end is set as a horizontal bar pointing towards the second micro switch; the front end of the mounting part is first bent horizontally, the middle part extends backward, and the rear end extends upward to slide into the encapsulation housing; The mounting part slides along a predetermined trajectory on the encapsulation housing, thereby causing the crossbar to press against or move away from the actuating spring of the second micro switch.

8. A door lock for a household appliance as described in claim 7, characterized in that: The front end of the door hook is bent downward to form a latch, the middle part is provided with a rotating shaft extending to both sides, and the rear end extends backward to connect with the action slider. The rotating shaft is rotatably mounted on the encapsulation housing by a torsion spring.

9. A door lock for a household appliance as described in claim 3, characterized in that: The transmission component includes at least a transmission gear and an actuating gear. The transmission gear is rotatably connected to the drive module and meshes with the actuating gear. The actuating gear is located in the through hole of the connecting part and has outwardly protruding teeth at its lower part. The protruding teeth are spatially limited by the upper locking teeth and the lower unlocking teeth.

10. A door lock for a household appliance as described in claim 8, characterized in that: The encapsulation housing includes an upper cover and a lower cover that fit together. The elastic positioning element is horizontally installed in the shaft holes on both sides of the front end of the upper cover and in the middle inner side. The rotating shaft of the door hook is rotatably installed in the shaft hole through a torsion spring. The top surface of the inner cavity of the upper cover is also provided with an upwardly recessed horizontal sliding groove, in which the sensing slider is embedded. A support platform is provided at the bottom opening of the lower cover, and the sensing slider is supported on the support platform; an inwardly arched limiting wall is provided on one side of the lower cover, and the limiting wall is used to restrict the guide part from sliding inward and stopping it in the unlocked state.

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