Household equipment with self-locking protection mechanism

Abstract

The utility model relates to the technical field of household equipment, and provides household equipment with a self-locking protection mechanism, which comprises a machine body and a door body opened and closed on an inner cavity of the machine body, and the machine body is provided with a driver and a lock rod; the lock rod is movably arranged on the machine body, and the output end of the driver is in direct or indirect transmission connection with the lock rod; when the working state of the household equipment reaches a preset locking condition, the driver drives the lock rod to move in the direction of locking the door body, and the lock rod moves to form mechanical interference with the door body so as to limit opening of the door body. Through cooperation of the driver and the lock rod, automatic locking of the door body under the preset locking condition is achieved, the situation that a user opens the door body by mistake when the household equipment is in the working state is effectively prevented, and the safety of the household equipment in the using process is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of household appliances, specifically to a household appliance with a self-locking protection mechanism. Background Technology

[0002] Existing household appliances, such as dishwashers, sterilizers, microwave ovens, or ovens, all have doors that open and close on the machine. During the drying process of a dishwasher, the high-temperature sterilization process of a sterilizer, and the cooking process of a microwave oven and oven, the internal temperature of these household appliances is usually high. If the doors can be opened at will while these household appliances are operating at high temperatures, the high-temperature gas can easily burn the user if the user accidentally opens them.

[0003] Dishwasher doors are usually equipped with a door lock microswitch. When the door lock is opened, the microswitch is turned off, the dishwasher is powered on, but the user can still open the door at will. Microwave ovens and ovens, on the other hand, generally have a two-step door unlocking mechanism to prevent accidental operation, effectively replacing the one-step door opening and closing structure.

[0004] Therefore, further improvements are made based on the existing technology described above. Utility Model Content

[0005] This utility model proposes a household appliance with a self-locking protection mechanism. Through the cooperation of the driver and the locking rod, the door is automatically locked under preset locking conditions, which effectively prevents users from accidentally opening the door while the household appliance is in operation, thus improving the safety of the household appliance during use.

[0006] A household appliance with a self-locking protection mechanism designed for this purpose includes a body and a door that opens and closes in the inner cavity of the body, the body being equipped with a drive and a locking lever;

[0007] The locking rod is movably mounted on the machine body, and the output end of the driver is directly or indirectly connected to the locking rod.

[0008] When the working state of the household appliance reaches the preset locking condition, the driver drives the locking rod to move along the locking door direction. The locking rod moves until it forms mechanical interference with the door to restrict the door from opening, thereby realizing the automatic locking of the door.

[0009] The machine body is equipped with a control device and a detection unit for detecting the working status parameters of household appliances;

[0010] The driver and the detection unit are electrically connected to the control device, which controls the operation of the driver based on the detection signal from the detection unit.

[0011] The detection unit is configured to control the driver to move the locking lever to the position of locking the door when it detects that the internal cavity temperature of the machine reaches a preset temperature threshold, or when it detects that the start-up time of the household appliance reaches a preset time threshold.

[0012] The detection unit includes a temperature sensor for detecting the internal cavity temperature of the machine.

[0013] The detection unit includes a timer for detecting the time from the start of operation of the household appliance to the end of operation.

[0014] The output end of the driver is provided with a transmission component that engages with the locking rod; the transmission component is movably connected to the output end of the driver.

[0015] The transmission component is a gear, and the locking rod is equipped with a rack that meshes with the gear.

[0016] The body is equipped with a first micro switch for detecting when the locking rod moves to its initial position and a second micro switch for detecting when the locking rod moves to its locked position at the corresponding movement stroke position; the locking rod is equipped with a toggle block for triggering the micro switches.

[0017] The door body is provided with a lock groove that mechanically interferes with the lock rod.

[0018] The inner side of the machine body is provided with a bracket for fixing the driver, and the machine body is provided with a guide groove corresponding to the locking rod. The locking rod is provided with a guide part that cooperates with the guide groove. During the movement of the locking rod, the guide part is limited to move within the guide groove.

[0019] The household appliances mentioned are microwave ovens, ovens, convection ovens, microwave-steam-grill combos, sterilizers, or dishwashers;

[0020] The driver and the locking rod are arranged vertically in sequence along the height of the machine body. The driver drives the locking rod to move up and down reciprocally.

[0021] Alternatively, the driver and locking lever are horizontally mounted on the body, with the driver driving the locking lever to reciprocate horizontally.

[0022] The beneficial technical effects of this utility model are as follows:

[0023] By coordinating the actuator and the locking lever, the door automatically locks under preset locking conditions, effectively preventing accidental opening by users while household appliances are in operation, thus improving safety during appliance use. Compared to traditional mechanical or electronic locks, this structure simplifies the transmission method; the actuator directly or indirectly drives the locking lever, reducing the number of parts and simplifying the automatic lock's structure. The locking lever creates mechanical interference with the door, ensuring the door cannot be forcibly opened under high temperature or high pressure conditions, preventing burns to users. Furthermore, this design is suitable for various household appliances (such as microwave ovens, ovens, and dishwashers), offering high versatility and eliminating the need for manual door locking, enhancing ease of use. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the driver, locking rod, and micro switch according to an embodiment of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of an embodiment of the present invention, showing the driver driving the locking rod to the locked position of the door.

[0026] Figure 3 This is a connection block diagram of the driver, detection unit and control device according to an embodiment of the present invention.

[0027] Figure 4 This is a three-dimensional structural diagram of a household appliance according to an embodiment of the present invention.

[0028] Figure 5 for Figure 4 Enlarged view of point A in the middle. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] See Figures 1-5 A household appliance with a self-locking protection mechanism includes a body 1 and a door 2 that opens and closes on the inner cavity of the body 1. The body 1 is provided with a driver 3 and a locking rod 4.

[0031] The locking rod 4 is movably mounted on the body 1, and the output end of the driver 3 is directly or indirectly connected to the locking rod 4.

[0032] When the working state of the household appliance reaches the preset locking condition, the driver 3 drives the locking rod 4 to move along the locking door 2. The locking rod 4 moves until it forms mechanical interference with the door 2 to restrict the opening of the door 2, thereby realizing the automatic locking of the door 2.

[0033] By cooperating with the actuator 3 and the locking lever 4, the door 2 automatically locks under preset locking conditions, effectively preventing accidental opening of the door 2 while household appliances are in operation, thus improving safety during appliance use. Compared to traditional mechanical or electronic locks, this structure simplifies the transmission method. The actuator 3 directly or indirectly drives the locking lever 4, reducing the number of parts and simplifying the automatic door lock structure. The locking lever 4 mechanically interferes with the door 2, ensuring that the door 2 cannot be forcibly opened under high temperature or high pressure conditions, preventing burns to the user. Furthermore, this design is applicable to various household appliances (such as microwave ovens, ovens, dishwashers, etc.), offering high versatility and eliminating the need for manual user intervention to lock the door 2, enhancing ease of use.

[0034] The body 1 is equipped with a control device 5 and a detection unit 6 for detecting the working status parameters of household appliances;

[0035] The driver 3 and the detection unit 6 are electrically connected to the control device 5 respectively. The control device 5 is used to control the operation of the driver 3 according to the detection signal of the detection unit 6.

[0036] By configuring the control device 5 and the detection unit 6, the operation of the drive unit 3 driving the locking lever 4 becomes more intelligent. The control device 5 automatically controls the drive unit 3 based on the working status parameters (such as temperature and time) fed back by the detection unit 6, ensuring that the door 2 is locked only when preset conditions are met, avoiding accidental locking or missed locking. For example, when the detection unit 6 detects that the internal temperature of the machine body 1 is too high, the control device 5 immediately activates the drive unit 3, driving the locking lever 4 to lock the door 2, preventing accidents caused by high-temperature gas from injuring people when the door 2 is arbitrarily opened. Furthermore, the detection unit 6 can generate door lock and door unlock signals, causing the drive unit 3 to move the locking lever 4 to the locked and unlocked positions, respectively.

[0037] The detection unit 6 is configured to control the driver 3 to drive the locking lever 4 to move to the position of locking the door 2 when the internal temperature of the body 1 reaches a preset temperature threshold, or when the start-up time of the household appliance reaches a preset time threshold.

[0038] The detection conditions of the detection unit 6 include a temperature threshold and a time threshold. When the internal temperature of the unit 1 reaches a preset safety limit (such as during the high-temperature sterilization stage of a disinfection cabinet, or when the cooking cavity temperature of an oven is too high) or after the household appliance has been running for a period of time (such as 20 or 30 seconds), the detection unit 6 sends a door lock signal to the control device 5, and the driver 3 then drives the locking lever 4 to lock the door 2. This dual-condition determination mechanism enhances safety and reliability, avoiding locking failure due to misjudgment by a single sensor.

[0039] The detection unit 6 includes a temperature sensor for detecting the internal temperature of the machine body 1. Specifically, the detection unit 6 is a temperature sensor used to monitor the internal temperature of the machine body 1 in real time. When the temperature exceeds a safety threshold (e.g., an oven reaching 200°C or higher), the temperature sensor immediately triggers the control device 5, and the actuator 3 drives the locking lever 4 to lock the door 2, preventing accidental opening and burns. This design is particularly suitable for high-temperature equipment (such as microwave ovens and lightwave ovens), achieving dynamic locking through precise temperature feedback, avoiding the problem of insufficient locking force caused by temperature changes in traditional mechanical locks. Furthermore, the temperature sensor has a fast response speed, effectively handling sudden high-temperature situations and ensuring the safety of the equipment under extreme operating conditions. When the internal temperature of the machine body 1 drops to the set unlocking temperature, the actuator 3 drives the locking lever 4 to disengage from the door 2, allowing the door 2 to be opened and items such as tableware or food to be retrieved.

[0040] The detection unit 6 includes a timer for detecting the start and end times of the household appliance's operation. The detection unit 6 is configured as a timer to monitor the appliance's operating time. When the appliance's start time reaches a preset threshold, the timer sends a signal to the control device 5, and the actuator 3 drives the locking lever 4 to lock the door 2, preventing forced interruption before the appliance completes its operation. This solution is suitable for appliances with fixed operating cycles (such as dishwashers and steam ovens), preventing users from opening the door prematurely and affecting the performance. When the appliance's operating time reaches the preset duration, the appliance finishes operating, the timer sends a signal to the control device 5, and the actuator 3 drives the locking lever 4 to disengage from the door 2.

[0041] The output end of the driver 3 is provided with a transmission component 7 that engages with the locking rod 4; the transmission component 7 is movably connected to the output end of the driver 3.

[0042] The transmission component 7 is a gear, and the locking rod 4 is provided with a rack 4.1 that meshes with the gear.

[0043] The drive unit 3 and the locking lever 4 are connected by a gear and rack 4.1 meshing structure. Gear transmission features high precision and low noise, ensuring that the locking lever 4 moves smoothly to the locked position and avoiding jamming or deviation.

[0044] The body 1 is provided with a first micro switch 8 for detecting when the locking rod 4 moves to the initial position and a second micro switch 9 for detecting when the locking rod 4 moves to the locked position at the corresponding movement stroke position; the locking rod 4 is provided with a toggle block 4.3 for triggering the micro switches.

[0045] The first microswitch 8 and the second microswitch 9 are used to detect the initial and locked positions of the locking lever 4, respectively. When the toggle block 4.3 on the locking lever 4 triggers the microswitch, the control device 5 can accurately determine the locking status, avoiding the problem of false locking caused by the locking lever 4 not being in position. The first microswitch 8 ensures that the locking lever 4 is fully reset, and the second microswitch 9 confirms that the door 2 is locked. This dual detection improves the reliability of the system. This design can also be linked to the equipment power supply (such as starting the working program after locking), further enhancing safety, and facilitating fault diagnosis (such as the equipment can alarm if the microswitch is not triggered when the locking lever 4 is stuck).

[0046] The door body 2 is provided with a lock groove 2.1 that forms mechanical interference with the lock rod 4.

[0047] Driver 3 is a motor.

[0048] The door body 2 is provided with a lock groove; the motor in the automatic door lock mechanism is equipped with gears. When the motor works, the gears rotate and drive the lock rod 4 to move up and down; the lock rod 4 moves downward to insert into the lock groove 2.1 to lock the door body 2, and vice versa to unlock the door; the machine body 1 is provided with two limit switches corresponding to the movement stroke of the lock rod 4, which respectively detect the downward and upward movement stroke positions of the lock rod 4.

[0049] The inner side of the body 1 is provided with a bracket 10 for fixing the driver 3. The body 1 is provided with a guide groove corresponding to the locking rod 4. The locking rod 4 is provided with a guide part 4.2 that cooperates with the guide groove. During the movement of the locking rod 4, the guide part 4.2 is limited to move within the guide groove.

[0050] The driver 3 is fixed by the bracket 10, and a guide groove is provided on the body 1 to cooperate with the guide part 4.2, ensuring that the locking rod 4 moves along the predetermined trajectory and preventing skewing or vibration. The rigid fixation of the bracket 10 prevents the driver 3 from shifting due to vibration, which would affect the transmission accuracy. At the same time, it facilitates assembly and maintenance (e.g., the locking rod 4 can be quickly disassembled and assembled along the guide groove).

[0051] In this embodiment, the driver 3 is fixed to the bracket 10 by screws.

[0052] In this embodiment, the guide portion 4.2 of the locking rod 4 may be provided with an undercut that engages with the outside of the guide groove to prevent the locking rod 4 from disengaging from the guide groove.

[0053] In this embodiment, the control device 5 includes a circuit board and a processing chip MCU disposed on the circuit board. The processing chip MCU is electrically connected to the circuit board through a pin.

[0054] A lock groove 2.1 is provided on the door body 2, which mechanically interferes with the lock rod 4. The structural design of the lock groove 2.1 (such as inclined guide or groove limit) allows the lock rod 4 to smoothly engage, reducing impact noise while ensuring a secure lock. Compared with the traditional door hook structure, the lock groove 2.1 has lower processing precision requirements and lower cost.

[0055] The household appliances mentioned are microwave ovens, ovens, convection ovens, microwave-steam-grill combos, sterilizers, or dishwashers;

[0056] The driver 3 and the locking rod 4 are arranged vertically in sequence along the height direction of the body 1 inside the body 1. The driver 3 drives the locking rod 4 to move up and down reciprocally.

[0057] Alternatively, the driver 3 and the locking lever 4 are arranged laterally on the body 1, and the driver 3 drives the locking lever 4 to move laterally back and forth.

[0058] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A household appliance with a self-locking protection mechanism, comprising a body (1) and a door (2) that opens and closes within the cavity of the body (1), characterized in that: The body (1) is equipped with a driver (3) and a locking rod (4). The locking rod (4) is movably mounted on the body (1), and the output end of the driver (3) is directly or indirectly connected to the locking rod (4). When the working state of the household appliance reaches the preset locking condition, the driver (3) drives the locking rod (4) to move along the locking door (2) direction. The locking rod (4) moves to form mechanical interference with the door (2) to restrict the opening of the door (2) and realize the automatic locking of the door (2).

2. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The body (1) is equipped with a control device (5) and a detection unit (6) for detecting the working status parameters of household appliances. The driver (3) and the detection unit (6) are electrically connected to the control device (5), and the control device (5) is used to control the operation of the driver (3) according to the detection signal of the detection unit (6).

3. The household appliance with a self-locking protection mechanism according to claim 2, characterized in that: The detection unit (6) is configured to control the driver (3) to drive the locking lever (4) to move to the position of locking the door (2) when the temperature inside the body (1) reaches a preset temperature threshold, or when the start time of the household appliance reaches a preset time threshold.

4. The household appliance with a self-locking protection mechanism according to claim 2, characterized in that: The detection unit (6) includes a temperature sensor for detecting the internal temperature of the body (1).

5. The household appliance with a self-locking protection mechanism according to claim 2, characterized in that: The detection unit (6) includes a timer for detecting the time from the start of operation of the household appliance to the end of operation.

6. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The output end of the driver (3) is provided with a transmission component (7) that engages with the locking rod (4); the transmission component (7) is movably connected to the output end of the driver (3); The transmission component (7) is a gear, and the locking rod (4) is provided with a rack (4.1) that meshes with the gear.

7. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The body (1) is provided with a first micro switch (8) for detecting the movement of the locking rod (4) to the initial position and a second micro switch (9) for detecting the movement of the locking rod (4) to the locked position at the corresponding movement stroke position; the locking rod (4) is provided with a toggle block (4.3) for triggering the micro switch.

8. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The door body (2) is provided with a lock groove (2.1) that forms mechanical interference with the lock rod (4).

9. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The inner side of the body (1) is provided with a bracket (10) for fixing the driver (3). The body (1) is provided with a guide groove corresponding to the locking rod (4). The locking rod (4) is provided with a guide part (4.2) that cooperates with the guide groove. During the movement of the locking rod (4), the guide part (4.2) is limited to move in the guide groove.

10. The household appliance with a self-locking protection mechanism according to claim 1, characterized in that: The household appliances mentioned are microwave ovens, ovens, convection ovens, microwave-steam-grill combos, sterilizers, or dishwashers; The driver (3) and the locking rod (4) are arranged vertically in sequence along the height direction of the body (1) inside the body (1), and the driver (3) drives the locking rod (4) to move up and down reciprocally; Alternatively, the driver (3) and the locking rod (4) are arranged laterally on the body (1), and the driver (3) drives the locking rod (4) to move laterally back and forth.

Images