Opening / closing degree detecting device for drawer-type automatic door and microwave oven

Abstract

The utility model provides a kind of opening and closing degree detection device of drawer type automatic door and microwave oven, the device includes detection module, controller MCU and reset module;Detection module, controller MCU and reset module are all arranged in microwave oven interior;Detection module is connected with reset module by controller MCU;Detection module includes encoder, PCB board, protection circuit and micro switch;Encoder, protection circuit are all arranged on PCB board, and encoder is connected with controller MCU by protection circuit, and micro switch is connected with reset module;Through the opening and closing degree detection device of drawer type automatic door and microwave oven described in the utility model, the structure of detection device can be simplified, to reach the accurate control of the needs of different users for different food opening distance;And in the case of sudden power failure, ensure that door body can still automatically run after power on, improve the accuracy of device degree door body opening and closing degree detection, improve user's use experience.

Description

Technical Field

[0001] This utility model relates to the field of microwave oven technology, and more specifically, to a device for detecting the opening and closing degree of a drawer-type automatic door and a microwave oven. Background Technology

[0002] Existing automatic doors for drawer-type microwave ovens can only detect when the door is fully closed. There's no standard for measuring how much the door is open. Since users need to fully open the drawer-type microwave oven every time they use it, detecting the door's position or opening progress becomes essential. Furthermore, currently, if there's a sudden power outage during use and power is restored, the automatic door stops, requiring manual opening and closing, which increases user complexity and reduces user experience. Therefore, researching how to detect the opening and closing degree of drawer-type automatic doors in real time and improve user convenience when using microwave ovens is of great significance.

[0003] Patent CN204063178U discloses a drawer-type microwave oven, including a door body installed at one end of the drawer. The door body has a hook, and the cooking cavity has a groove that engages with the hook. A microswitch is installed in the groove, and engagement or disengagement of the hook with the groove activates or deactivates the microswitch. A locking switch is provided on the control panel. A controller is also included, connected to the control panel and the drive device. The controller can control the operation of the drive device according to instructions from the control panel. Furthermore, the drive device within the microwave oven includes a drive motor. The actuator includes a first gear and a rack, with the output shaft of the drive motor connected to the first gear, and the rack fixedly mounted on the bottom of the drawer. While the child lock mode provides better child protection, it still cannot accurately detect the degree of drawer opening and closing. Utility Model Content

[0004] In view of this, the present invention aims to propose a device for detecting the opening and closing degree of a drawer-type automatic door and a microwave oven, to solve the problems of existing drawer-type automatic door detection devices being unable to accurately measure the opening and closing degree of the door, and the automatic door failing to automatically reset after power is restored in the event of a sudden power outage, requiring manual closing, which easily leads to a reduced user experience and complicated operation; thereby simplifying the structure of the detection device, achieving precise control of the door opening distance required by different users for different foods; and ensuring that the door can still operate automatically after power is restored in the event of a sudden power outage, reducing the cost of the device, improving the accuracy of the device in detecting the opening and closing degree of the door, and enhancing the user experience.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] This utility model relates to a device for detecting the opening and closing degree of a drawer-type automatic door and a microwave oven. The device for detecting the opening and closing degree of a drawer-type automatic door includes a detection module, a controller MCU, and a reset module. The detection module, controller MCU, and reset module are all located inside the microwave oven. The detection module is connected to the reset module through the controller MCU. The detection module includes an encoder, a PCB board, a protection circuit, and a micro switch. The encoder and the protection circuit are both located on the PCB board. The encoder is connected to the controller MCU through the protection circuit. The micro switch is located on the side of the microwave oven cavity near the oven door and is connected to the reset module.

[0007] Furthermore, at least two microswitches should be provided.

[0008] Furthermore, the detection module also includes a gear; the gear is mounted on the side of the encoder away from the PCB board, and the outer wall of the gear engages with the burrs on the slide rail inside the microwave oven.

[0009] Furthermore, the detection module also includes a first socket, the two ends of which are connected to the encoder and the protection circuit, respectively; the first socket is soldered onto the PCB board.

[0010] Furthermore, the first socket includes socket CN1 and socket CN2, both of which are soldered onto the PCB board; socket CN1 is connected to the encoder, and socket CN2 is connected to the protection circuit; socket CN1 is connected to socket CN2 via a second ribbon cable.

[0011] Furthermore, the protection circuit includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2; one end of the first resistor R1 and the second resistor R2 are respectively connected to the signal1 and signal2 pins of the controller MCU; the other end of the first resistor R1 is respectively connected to the pin3 of the socket CN2 and one end of the first capacitor C1, the other end of the second resistor R2 is respectively connected to the pin2 of the socket CN2 and one end of the second capacitor C2, and the other end of the pin1 of the socket CN2, the first capacitor C1, and the second capacitor C2 are connected to ground in parallel.

[0012] Furthermore, the reset module includes a reset circuit and a second socket, and the controller MCU is connected to the micro switch in sequence through the reset circuit and the second socket.

[0013] Furthermore, the second socket includes socket CN3 and socket CN4; the two micro switches are micro switch one and micro switch two, respectively, and socket CN3 and socket CN4 are connected to micro switch one and micro switch two via the first ribbon cable.

[0014] Furthermore, the reset circuit includes a first diode D1 and a second diode D2; the positive terminal of the first diode D1 is connected to the power supply VCC and the DOOR1 pin of the controller MCU, respectively, and the negative terminal of the first diode D1 is connected to the pin 3 of the socket CN3; the pin 1 of the socket CN3 and the pin 1 of the socket CN4 are connected to ground in parallel; the pin 3 of the socket CN4 is connected to the negative terminal of the second diode D2, and the positive terminal of the second diode D2 is connected to the power supply VCC and the DOOR2 pin of the controller MCU, respectively.

[0015] A microwave oven includes a drawer-type automatic door opening degree detection device, the device being disposed inside the microwave oven.

[0016] Compared with the prior art, the drawer-type automatic door opening degree detection device and microwave oven described in this utility model have the following beneficial effects:

[0017] By setting up the aforementioned device, the structure of the detection device can be simplified, thereby achieving precise control over the door opening distance required by different users for different foods; and in the event of a sudden power outage, it ensures that the door can still operate automatically after power is restored, reducing the cost of the device, improving the accuracy of the device in detecting the degree of door opening and closing, and enhancing the user experience. Attached Figure Description

[0018] The accompanying drawings, which constitute a part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments and descriptions of the utility model are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0019] Figure 1 This is a schematic diagram of the internal circuitry of the detection device;

[0020] Figure 2 This is a first-person view schematic diagram of the overall structure of the device and the slide rail connection method.

[0021] Figure 3 This is a second-view schematic diagram of the overall structure of the device and the slide rail connection method.

[0022] Figure 4 A third-person perspective schematic diagram of the overall structure of the device and its connection to the slide rail;

[0023] Figure 5 A fourth-person perspective schematic diagram of the overall structure of the device and the slide rail connection method;

[0024] Figure 6a This is a schematic diagram simulating the signal status received by the MCU during the furnace door opening process (blue represents the signal of signal1, and yellow represents the signal of signal2).

[0025] Figure 6bThis is a schematic diagram simulating the signal status received by the MCU during the furnace door closing process (blue represents the signal of signal1, and yellow represents the signal of signal2).

[0026] Explanation of reference numerals in the attached diagram: 1. Detection module; 11. Encoder; 12. PCB board; 13. Protection circuit; 14. Micro switch; 15. Gear; 16. First socket; 2. Reset module; 21. Reset circuit; 22. Second socket. Detailed Implementation

[0027] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to convey the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] This embodiment is for a microwave oven. Similar to a conventional microwave oven, the overall structure consists of a shell, a cavity, and a magnetron.

[0031] To address the problems of existing drawer-type automatic door detection devices failing to accurately measure the opening degree of the door, and the automatic door not automatically resetting after power failure, requiring manual closing and thus complicating user experience, this embodiment proposes a drawer-type automatic door opening degree detection device and a microwave oven. The device includes a detection module 1, a controller MCU, and a reset module 2. The detection module 1, controller MCU, and reset module 2 are all located inside the microwave oven. The detection module 1 is connected to the reset module 2 via the controller MCU. The detection module 1 includes an encoder 11, a PCB board 12, a protection circuit 13, and a micro switch 14. The encoder 11 and protection circuit 13 are both mounted on the PCB board 12. The encoder 11 is connected to the controller MCU via the protection circuit 13. The micro switch 14 is located on the side of the microwave oven cavity near the door and is connected to the reset module 2. The encoder 11 is soldered onto the PCB board 12. At least two micro switches 14 are provided. Preferably, two microswitches 14 are provided, both of which are located on the upper part of the microwave oven cavity near the door, and are used to detect the open / closed state of the microwave oven door. Both microswitches 14 are connected to the reset module 2 via the first ribbon cable.

[0032] By arranging the components within the device, the structure of the detection device can be simplified, thereby achieving precise control over the door opening distance required by different users for different foods; and in the event of a sudden power outage, it ensures that the door can still operate automatically after power is restored, reducing the cost of the device, improving the accuracy of the device in detecting the degree of door opening and closing, and enhancing the user experience.

[0033] The detection module 1 is located at the lower end of the microwave oven cavity near the oven door. The detection module 1 also includes a gear 15. The gear 15 is mounted on the side of the encoder 11 away from the PCB board 12, and the outer wall of the gear 15 engages with the burrs of the slide rail inside the microwave oven.

[0034] By using the gear 15, encoder 11, and slide rail in conjunction, an encoder 11 is added to the burr of the drawer-type microwave oven slide rail. This allows the encoder 11 to rotate with every movement of the oven door, thus detecting the door's movement. This not only simplifies the device's structure and improves the accuracy of detecting the oven door's position by encoding and counting the rotation between the gear 15 and the slide rail.

[0035] The detection module 1 also includes a first socket 16, with its two ends connected to the encoder 11 and the protection circuit 13, respectively. The first socket 16 is soldered onto the PCB board 12. The first socket 16 includes socket CN1 and socket CN2, both of which are soldered onto the PCB board 12; socket CN1 is connected to the encoder 11, and socket CN2 is connected to the protection circuit 13. The detection module 1 also includes a second ribbon cable, with socket CN1 connected to socket CN2 via the second ribbon cable. Specifically, one end of the second ribbon cable is connected to the PCB board 12 via socket CN1, and the other end of the second ribbon cable is connected to the MCU via socket CN2.

[0036] By using the first socket 16 and the second cable together, the safety, tightness and order of the connection between the components in the detection module 1 can be improved, making the connection between the components more regular. This helps to prevent excessive wire tangling, which would affect the safety of the PCB board 12. It also helps to extend the service life of the device and improve the maintenance and installation efficiency of the device.

[0037] The protection circuit 13 includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2. One end of the first resistor R1 and the second resistor R2 are connected to pins signal1 and signal2 of the controller MCU, respectively; the other end of the first resistor R1 is connected to pin 3 of socket CN2 and one end of the first capacitor C1, respectively; the other end of the second resistor R2 is connected to pin 2 of socket CN2 and one end of the second capacitor C2, respectively; and pin 1 of socket CN2, the other end of the first capacitor C1, and the second capacitor C2 are connected to ground in parallel.

[0038] By configuring the components within the protection circuit 13, the controller MCU can be protected, filtering can be performed to ensure the accuracy of the input signal, and anti-interference can be achieved to improve the accuracy of the device's detection results.

[0039] The reset module 2 includes a reset circuit 21 and a second socket 22. The controller MCU is connected to the micro switches 14 sequentially through the reset circuit 21 and the second socket 22. The second socket 22 includes socket CN3 and socket CN4. The two micro switches 14 are micro switch one and micro switch two, respectively. Sockets CN3 and CN4 are connected to micro switch one and micro switch two via first ribbon cables, respectively. In this embodiment, micro switch one is positioned when the furnace door inside the cavity is completely closed, and micro switch two is positioned when the furnace door inside the cavity is completely open. The specific positions of micro switch one and micro switch two are set according to requirements.

[0040] By configuring the reset circuit 21 and the second socket 22, a microswitch 14 is installed at the fully open position of the oven door to detect that the oven door is fully open; another microswitch 14 is installed at the fully closed position of the oven door. When the oven door is fully closed, the first microswitch closes, and this signal serves as the reset signal for the encoder 11, thus ensuring the accuracy of the encoder 11. The coordinated configuration of the two microswitches 14 and the reset circuit 21 effectively changes the automatic door control method of the drawer-type microwave oven, thereby meeting the needs of each user for different food opening distances and achieving effective control of the automatic door after power failure and re-energization. Furthermore, the innovative automatic door detection design of the drawer-type microwave oven allows users to accurately know the position of the oven door, and the automatic door can still operate automatically after power failure and re-energization, thus greatly improving the user experience.

[0041] The reset circuit 21 includes a first diode D1 and a second diode D2. The anode of the first diode D1 is connected to the power supply VCC and the DOOR1 pin of the controller MCU, respectively, and the cathode of the first diode D1 is connected to pin 3 of the socket CN3. Pin 1 of the socket CN3 and pin 1 of the socket CN4 are connected to ground in parallel. Pin 3 of the socket CN4 is connected to the cathode of the second diode D2, and the anode of the second diode D2 is connected to the power supply VCC and the DOOR2 pin of the controller MCU, respectively. Pin 2 of the socket CN3 and pin 2 of the socket CN4 are connected to microswitch one and microswitch two, respectively. In this embodiment, the power supply VCC is 5V. The specific value of the power supply VCC is set according to requirements.

[0042] By using two diodes, the furnace door can be accurately detected in both fully open and fully closed states. Furthermore, the state of the two diodes during the opening and closing process can determine the direction of the furnace door's movement. Additionally, the reset circuit 21 sends the current state to the corresponding register in the encoder 11 in the event of a sudden power outage. Upon power-up, the system checks the flag indicating the furnace door's state before the power outage to ensure automatic movement of the furnace door in a preset direction. This improves user convenience and satisfaction.

[0043] Working principle:

[0044] When the furnace door is completely closed, micro switch one is closed and micro switch two is open. At this time, pins 1 and 3 of CN3 are connected, CN4 is open, D1 is on, D2 is off, pin DOOR1 outputs a low level signal, pin DOOR2 outputs a high level signal, the MCU sets the value of the register corresponding to encoder 11 to zero, and the flag bit becomes 00.

[0045] When the furnace door is opening, both microswitches 14 are open, CN3 and CN4 are open circuits, D1 and D2 are cut off, and the output signals of pins DOOR1 and DOOR2 are high. The burrs on the side slide rail of the furnace door drive gear 15 to rotate, and encoder 11 also rotates. At this time, the input signals of pins signal1 and signal2 are pulse signals with a phase difference, used to determine the rotation direction of encoder 11. Simultaneously, the controller MCU receives a signal from pin signal1 that leads the signal from pin signal2, such as... Figure 6a As shown (this signal is triggered by a low level), the corresponding register starts counting, and the flag bit changes to 01. If needed, the controller MCU can display the register value on the screen in real time, allowing the user to intuitively see the enabled status.

[0046] If the power is suddenly cut off and then restored during the opening of the furnace door, the furnace door will continue to open automatically because the value in the flag bit is 01.

[0047] When the furnace door is fully opened, micro switch 2 is closed and micro switch 1 is open. At this time, pins 1 and 3 of CN4 are connected, CN3 is open, D2 is on, D1 is off, the signal output by pin DOOR2 is low, the signal output by pin DOOR1 is high, and the MCU changes the flag bit to 11.

[0048] When the furnace door is closing, both microswitches 14 are open, CN3 and CN4 are open-circuit, D1 and D2 are cut off, and the outputs of pins DOOR1 and DOOR2 are both high. The burrs on the side slide rail of the furnace door drive gear 15 to rotate, and encoder 11 also rotates. At this time, the signals input to pins signal1 and signal2 are both pulse signals with a phase difference, used to determine the rotation direction of encoder 11. Simultaneously, the signal received by the MCU from pin signal1 lags behind the signal input from pin signal2. Figure 6b As shown (this signal is triggered by a low level), the corresponding register starts counting, and the flag bit changes to 10.

[0049] If a power outage occurs during the furnace door closing process and then power is restored, the furnace door will continue to close automatically because the value in the flag bit is 10. The flag bits corresponding to the status of each furnace door are shown in Table 1 below.

[0050] Table 1. Flags corresponding to the status of each furnace door.

[0051] Furnace door status Flag Completely shut down 00 During startup 01 Fully open 11 During the closing process 10

[0052] A microwave oven includes a drawer-type automatic door opening / closing degree detection device, the device being disposed inside the microwave oven. The microwave oven also includes a slide rail disposed at the bottom of the drawer.

[0053] The microwave oven's design effectively enables the device to work in conjunction with the oven's slide rails, achieving automatic control of the oven door and real-time monitoring of the door's opening and closing degree.

[0054] In this utility model, any microwave oven may include the opening and closing degree detection device structure of the drawer-type automatic door described in this embodiment. In addition to the relevant structures and assembly relationships of the gear 15 and encoder 11 provided in this embodiment, the microwave oven also includes conventional components such as the shell, cavity, and magnetron. Since these are all prior art, they will not be described in detail here.

[0055] The above description is only a preferred embodiment of the present utility model and is 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 should be included within the protection scope of the present utility model.

Claims

1. A device for detecting the opening and closing degree of a drawer-type automatic door, characterized in that, It includes a detection module (1), a controller MCU and a reset module (2); the detection module (1), the controller MCU and the reset module (2) are all located inside the microwave oven; the detection module (1) is connected to the reset module (2) through the controller MCU; the detection module (1) includes an encoder (11), a PCB board (12), a protection circuit (13) and a micro switch (14); the encoder (11) and the protection circuit (13) are both located on the PCB board (12), the encoder (11) is connected to the controller MCU through the protection circuit (13), the micro switch (14) is located on the side of the microwave oven cavity near the oven door, and the micro switch (14) is connected to the reset module (2).

2. The opening degree detecting device for a drawer type automatic door according to claim 1, wherein At least two microswitches (14) are provided.

3. The opening degree detecting device for a drawer type automatic door according to claim 1, wherein The detection module (1) also includes a gear (15); the gear (15) is installed on the side of the encoder (11) away from the PCB board (12), and the outer wall of the gear (15) engages with the burrs of the slide rail inside the microwave oven.

4. The opening / closing degree detecting device for a drawer type automatic door according to claim 1, characterized in that, The detection module (1) also includes a first socket (16), the two ends of which are connected to the encoder (11) and the protection circuit (13) respectively; the first socket (16) is soldered onto the PCB board (12).

5. The opening / closing degree detecting device of a drawer type automatic door according to claim 4, wherein The first socket (16) includes socket CN1 and socket CN2, both of which are soldered onto the PCB board (12); socket CN1 is connected to the encoder (11), and socket CN2 is connected to the protection circuit (13); socket CN1 is connected to socket CN2 via a second ribbon cable.

6. The opening / closing degree detecting device of a drawer type automatic door according to claim 1, characterized in that, The protection circuit (13) includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2; one end of the first resistor R1 and the second resistor R2 are respectively connected to the signal1 and signal2 pins of the controller MCU; the other end of the first resistor R1 is respectively connected to the pin 3 of the socket CN2 and one end of the first capacitor C1, the other end of the second resistor R2 is respectively connected to the pin 2 of the socket CN2 and one end of the second capacitor C2, and the other end of the pin 1 of the socket CN2, the first capacitor C1, and the second capacitor C2 are connected to ground in parallel.

7. The opening degree detecting device of a drawer type automatic door according to claim 1, wherein The reset module (2) includes a reset circuit (21) and a second socket (22). The controller MCU is connected to the micro switch (14) in sequence through the reset circuit (21) and the second socket (22).

8. The opening degree detecting device of a drawer type automatic door according to claim 7, wherein The second socket (22) includes socket CN3 and socket CN4; the two micro switches (14) are micro switch one and micro switch two, respectively, and socket CN3 and socket CN4 are connected to micro switch one and micro switch two through the first ribbon cable.

9. The opening degree detecting device of a drawer type automatic door according to claim 7, wherein The reset circuit (21) includes a first diode D1 and a second diode D2; the positive terminal of the first diode D1 is connected to the power supply VCC and the DOOR1 pin of the controller MCU, respectively, and the negative terminal of the first diode D1 is connected to the pin 3 of the socket CN3; the pin 1 of the socket CN3 and the pin 1 of the socket CN4 are connected to ground in parallel; the pin 3 of the socket CN4 is connected to the negative terminal of the second diode D2, and the positive terminal of the second diode D2 is connected to the power supply VCC and the DOOR2 pin of the controller MCU, respectively.

10. A microwave oven characterized by comprising: The invention includes a drawer-type automatic door opening degree detection device according to any one of claims 1-9, the device being installed inside a microwave oven.

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