A switching mechanism and a microwave oven
By employing a dual microswitch and fuse design in the microwave oven to form first and second electrical circuits, the microwave leakage problem caused by microswitch failure is solved, and circuit safety is ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU YINGZI TECH CO LTD
- Filing Date
- 2025-04-03
- Publication Date
- 2026-05-26
AI Technical Summary
In existing microwave ovens, a malfunctioning microswitch causes the door to remain closed even after the door has been opened, resulting in microwave leakage and affecting user safety.
The design employs a dual microswitch and fuse to form first and second electrical circuits. When the first microswitch malfunctions, closing the second microswitch activates the second electrical circuit, causing the fuse to short-circuit and disconnect the circuit, thus ensuring safety.
Effectively prevents microwave leakage and ensures user safety. The design of dual microswitches and fuses ensures that the circuit will automatically disconnect in the event of a microswitch failure, thus avoiding microwave leakage.
Smart Images
Figure CN224290112U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of microwave ovens, and more specifically, relates to a switching mechanism and a microwave oven. Background Technology
[0002] Microwave ovens are common cooking appliances in modern life. They heat food using microwaves. To prevent microwaves from harming the user, the microwave source needs to be shut down after the door is opened. Currently, this is usually achieved through a microswitch that works in conjunction with the door; opening the door disconnects the microwave source circuit. However, over time, if the microswitch malfunctions, it may remain closed even after the door is opened. This closed microswitch allows the microwave source to continue operating, causing microwave leakage and seriously endangering user safety. Utility Model Content
[0003] The purpose of this invention is to provide a switching mechanism to solve the technical problem in the prior art where the microswitch remains closed due to a malfunction after the door is opened, leading to microwave leakage.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a switching mechanism is provided, comprising: a positive terminal, a negative terminal, a first micro switch, a second micro switch, a fuse, and a power-consuming unit; the positive terminal, the fuse, the first micro switch, the power-consuming unit, and the negative terminal are sequentially electrically connected to form a first electrical circuit; the positive terminal, the fuse, the first micro switch, the second micro switch, and the negative terminal are sequentially electrically connected to form a second electrical circuit.
[0005] Furthermore, it also includes: a housing, a door rotatably mounted on the housing, a first triggering mechanism, and a second triggering mechanism; the door can switch between a first rotation position and a second rotation position; when the door rotates to the first rotation position, the door can trigger the first micro switch through the first triggering mechanism, and the door can trigger the second micro switch through the second triggering mechanism; the first micro switch is a normally open switch, and the second micro switch is a normally closed switch.
[0006] Furthermore, the first triggering mechanism includes: a first protrusion disposed on the door body, a first rotating member rotatably disposed on the housing, and a first reset member for holding the first rotating member in a first initial position; the first reset member connects the first rotating member and the housing; when the door body rotates to the first rotation position, the first protrusion can push the first rotating member to rotate and trigger the first micro switch.
[0007] Furthermore, the first reset element is a first spring.
[0008] Furthermore, the housing has a guide hole for guiding the first protrusion to move toward the first rotating member.
[0009] Furthermore, the second triggering mechanism includes: a second rotating member rotatably disposed on the housing, a second protrusion disposed on the second rotating member, and a second reset member for holding the second rotating member in a second initial position; the second reset member connects the second rotating member and the housing; when the door rotates to the first rotation position, the door can push the second rotating member to rotate through the second protrusion and trigger the second micro switch.
[0010] Furthermore, the second reset element is a second spring.
[0011] Furthermore, the housing has a through hole, and the second protrusion passes through the through hole.
[0012] Furthermore, it also includes: a third micro switch disposed on the housing; the door can be rotated to a third rotation position; the third rotation position is located between the first rotation position and the second rotation position; when the door rotates from the second rotation position to the third rotation position, the first rotating component triggers the third micro switch; the third micro switch is a normally open switch.
[0013] This utility model also provides a microwave oven, including: the switching mechanism; the power-consuming unit is a magnetron.
[0014] The beneficial effects of the switching mechanism provided by this utility model are as follows: Compared with the prior art, the switching mechanism and microwave oven provided by this utility model form a first electrical circuit with the positive terminal, fuse, first micro switch, power-consuming unit, and negative terminal; when the first micro switch conducts the circuit, the first electrical circuit is activated, and the current can sequentially pass through the positive terminal, fuse, first micro switch, power-consuming unit, and then reach the negative terminal; when the first electrical circuit is activated, an external power supply can power the power-consuming unit; the positive terminal, fuse, first micro switch, second micro switch, and negative terminal form a second electrical circuit; when the first micro switch and the second micro switch are activated, the second electrical circuit is activated; when the first micro switch and the second micro switch are activated, the second electrical circuit is activated. Once the microswitches are both conducting, the second circuit can be connected. The current flows sequentially through the positive terminal, the fuse, the first microswitch, the second microswitch, and finally to the negative terminal. When the second circuit is conducting, the fuse will short-circuit and blow, breaking the second circuit. In summary, when the second microswitch is open, the first microswitch can connect the circuit to conduct the first circuit, and when the first microswitch is closed, the first circuit can be broken. If the first microswitch malfunctions and fails to break the circuit, the user only needs to close the second microswitch to connect the second circuit. When the second circuit is conducting, the fuse will short-circuit and break the circuit, ensuring circuit safety. Attached Figure Description
[0015] Figure 1 An assembly perspective view of the switching mechanism provided in an embodiment of this utility model;
[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;
[0017] Figure 3 A schematic diagram of the assembly of the switching mechanism provided in an embodiment of this utility model;
[0018] Figure 4 Assembly diagrams showing the first micro switch, second micro switch, and third micro switch respectively mate with the mounting plate, provided for embodiments of this utility model;
[0019] Figure 5 A perspective view of the first rotating member and the second rotating member provided in the embodiments of this utility model;
[0020] Figure 6 A perspective view of the mounting plate provided in an embodiment of this utility model;
[0021] Figure 7 A schematic diagram of the first micro switch, the second micro switch, and the third micro switch provided in an embodiment of this utility model;
[0022] Figure 8A schematic diagram of the principle of the switching mechanism (when the door rotates to the first rotation position, the first micro switch closes and the second micro switch opens) provided in an embodiment of this utility model;
[0023] Figure 9 A schematic diagram of the switching mechanism provided in this embodiment of the utility model (when the door rotates to the second rotation position, the first microswitch remains closed in case of failure, the second microswitch closes, and the second electrical circuit is connected to cause the fuse to blow).
[0024] The following are the labeling elements in the figure:
[0025] 11-Positive terminal; 12-Negative terminal; 13-Fuse; 21-First micro switch; 22-Second micro switch; 23-Third micro switch; 31-Power unit; 32-Variable frequency board; 33-Mounting plate; 41-Box; 411-Guide hole; 412-Through hole; 42-Door; 51-First rotating component; 52-First protrusion; 53-Second rotating component; 54-Second protrusion. Detailed Implementation
[0026] It should be noted that the specific embodiments are only used to explain the present invention and are not intended to limit the present invention.
[0027] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Here, A and B can be singular or plural, respectively.
[0028] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" or "attached to" another component, it can be directly connected to or indirectly connected to that other component. When a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component.
[0029] It should be noted that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.
[0031] It should be noted that the term "multiple" means two or more, unless otherwise explicitly specified.
[0032] Please refer to the following: Figures 1 to 9 The switching mechanism provided by this utility model will now be described. The switching mechanism includes: a positive terminal 11, a negative terminal 12, a first micro switch 21, a second micro switch 22, a fuse 13, and a power-consuming unit 31; the positive terminal 11, the fuse 13, the first micro switch 21, the power-consuming unit 31, and the negative terminal 12 are sequentially electrically connected to form a first electrical circuit; the positive terminal 11, the fuse 13, the first micro switch 21, the second micro switch 22, and the negative terminal 12 are sequentially electrically connected to form a second electrical circuit.
[0033] Thus, the positive terminal 11, fuse 13, first micro switch 21, power unit 31, and negative terminal 12 form a first electrical circuit. When the first micro switch 21 is turned on, the first electrical circuit is activated, and the current flows sequentially through the positive terminal 11, fuse 13, first micro switch 21, power unit 31, and then to the negative terminal 12. When the first electrical circuit is activated, an external power source can supply power to the power unit 31. The positive terminal 11, fuse 13, first micro switch 21, second micro switch 22, and negative terminal 12 form a second electrical circuit. When both the first micro switch 21 and the second micro switch 22 are turned on, the circuit is activated. In the second electrical circuit, the current flows sequentially through the positive terminal 11, fuse 13, first micro switch 21, and second micro switch 22 before reaching the negative terminal 12. When the second electrical circuit is active, fuse 13 will short-circuit and blow, thus disconnecting the second electrical circuit. In summary, when the second micro switch 22 is off, the first micro switch 21 can connect the circuit to conduct the first electrical circuit, and disconnect the circuit to disconnect the first electrical circuit. If the first micro switch 21 malfunctions and fails to disconnect the circuit, the user only needs to close the second micro switch 22 to connect the second electrical circuit. When the second electrical circuit is active, fuse 13 will short-circuit and disconnect the circuit, ensuring circuit safety.
[0034] In one embodiment, the positive terminal 11 and the negative terminal 12 are connected to a 220V AC mains power supply.
[0035] Further, please refer to Figures 1 to 9As a specific embodiment of the switching mechanism provided by this utility model, it further includes: a housing 41, a door 42 rotatably mounted on the housing 41, a first triggering mechanism, and a second triggering mechanism; the door 42 can switch between a first rotation position and a second rotation position; when the door 42 rotates to the first rotation position, the door 42 can trigger the first micro switch 21 through the first triggering mechanism, and the door 42 can trigger the second micro switch 22 through the second triggering mechanism; the first micro switch 21 is a normally open switch, and the second micro switch 22 is a normally closed switch. Thus, when the door 42 rotates to the first position, the door 42 can trigger the first micro switch 21 and the second micro switch 22 respectively; since the first micro switch 21 is a normally open switch, the door 42 can conduct the first electrical circuit after triggering the first micro switch 21; since the second micro switch 22 is a normally closed switch, the door 42 can disconnect the second electrical circuit after triggering the second micro switch 22.
[0036] In one embodiment, during the process of the door 42 rotating from the second rotation position to the first rotation position, the door 42 first triggers the second micro switch 22, and then the door 42 triggers the first micro switch 21.
[0037] In one embodiment, during the process of the door 42 rotating from the second rotation position to the first rotation position, the door 42 first triggers the second micro switch 22, then the door 42 triggers the third micro switch 23, and finally the door 42 triggers the first micro switch 21.
[0038] In one embodiment, when the door 42 rotates to the first rotation position, the door 42 is in the closed state.
[0039] In one embodiment, when the door 42 rotates to the second rotation position, the door 42 is in the open state.
[0040] "Normal open switch" refers to a switch that remains open when not triggered and remains closed when triggered.
[0041] Among them, "normally closed switch" means that the switch remains closed when it is not triggered and remains open when it is triggered.
[0042] Further, please refer to Figures 1 to 9As a specific embodiment of the switching mechanism provided by this utility model, the first triggering mechanism includes: a first protrusion 52 disposed on the door body 42, a first rotating member 51 rotatably disposed on the housing 41, and a first reset member for holding the first rotating member 51 in a first initial position; the first reset member connects the first rotating member 51 and the housing 41; when the door body 42 rotates to the first rotation position, the first protrusion 52 can push the first rotating member 51 to rotate and trigger the first micro switch 21. Thus, the first rotating member 51 can be held in the first initial position under the action of the first reset member; when the door body 42 rotates to the first rotation position, the door body 42 can push the first rotating member 51 to rotate through the first protrusion 52 and trigger the first micro switch 21; when the door body 42 rotates to the second rotation position, the door body 42 can release the triggering of the first micro switch 21; the first rotating member 51 returns to the first initial position through the first reset member.
[0043] Further, please refer to Figures 1 to 9 In one specific embodiment of the switching mechanism provided by this utility model, the first reset element is a first spring. Thus, the spring structure is simple.
[0044] Further, please refer to Figures 1 to 9 As a specific embodiment of the switching mechanism provided by this utility model, the housing 41 has a guide hole 411 for guiding the first protrusion 52 to move toward the first rotating member 51. In this way, the guide hole 411 can guide the first protrusion 52 to move.
[0045] Further, please refer to Figures 1 to 9 As a specific embodiment of the switching mechanism provided by this utility model, the second triggering mechanism includes: a second rotating member 53 rotatably disposed on the housing 41, a second protrusion 54 disposed on the second rotating member 53, and a second reset member for holding the second rotating member 53 in a second initial position; the second reset member connects the second rotating member 53 and the housing 41; when the door 42 rotates to the first rotating position, the door 42 can push the second rotating member 53 to rotate through the second protrusion 54 and trigger the second micro switch 22. Thus, the second rotating member 53 can be held in the second initial position under the action of the second reset member; when the door 42 rotates to the first rotating position, the door 42 can push the second rotating member 53 to rotate through the second protrusion 54 and trigger the second micro switch 22; when the door 42 rotates to the second rotating position, the door 42 can release the triggering of the second micro switch 22; the second rotating member 53 returns to the second initial position through the second reset member.
[0046] In one embodiment, it further includes: a mounting plate 33 disposed on the housing 41; a first micro switch 21, a second micro switch 22 and a third micro switch 23 are respectively disposed on the mounting plate 33.
[0047] Further, please refer to Figures 1 to 9 In one specific embodiment of the switching mechanism provided by this utility model, the second reset element is a second spring. Thus, the spring structure is simple.
[0048] Further, please refer to Figures 1 to 9 As a specific embodiment of the switching mechanism provided by this utility model, a through hole 412 is provided on the housing 41, and the second protrusion 54 passes through the through hole 412. In this way, the through hole 412 can guide the movement of the first protrusion 52.
[0049] Further, please refer to Figures 1 to 9 As a specific embodiment of the switching mechanism provided by this utility model, it further includes: a third micro switch 23 disposed on the housing 41; the door 42 is rotatable to a third rotation position; the third rotation position is located between the first rotation position and the second rotation position; when the door 42 rotates from the second rotation position to the third rotation position, the first rotating component 51 triggers the third micro switch 23; the third micro switch 23 is a normally open switch. Thus, when the door 42 rotates to the third rotation position, the door 42 can trigger the third micro switch 23 through the first rotating component 51, allowing the user to determine whether the door 42 is open via the third micro switch 23.
[0050] Please see Figures 1 to 9 This utility model also provides a microwave oven, including: a switching mechanism; and a magnetron as the power-consuming unit 31. Thus, due to the adoption of the aforementioned switching mechanism, the positive terminal 11, fuse 13, first micro switch 21, power-consuming unit 31, and negative terminal 12 form a first electrical circuit; when the first micro switch 21 conducts the circuit, the first electrical circuit is activated, and the current can sequentially pass through the positive terminal 11, fuse 13, first micro switch 21, power-consuming unit 31, and then reach the negative terminal 12; when the first electrical circuit is activated, an external power source can supply power to the power-consuming unit 31; the positive terminal 11, fuse 13, first micro switch 21, second micro switch 22, and negative terminal 12 form a second electrical circuit; when both the first micro switch 21 and the second micro switch 22 are activated... After the first microswitch 21 is turned on, the second electrical circuit can be connected. The current can pass through the positive terminal 11, the fuse 13, the first microswitch 21, and the second microswitch 22 in sequence to reach the negative terminal 12. When the second electrical circuit is connected, the fuse 13 will short-circuit and blow, thus disconnecting the second electrical circuit. In summary, when the second microswitch 22 is turned off, the first microswitch 21 can connect the circuit and connect the first electrical circuit. When the first microswitch 21 is turned off, the first electrical circuit can be disconnected. If the first microswitch 21 is malfunctioning and cannot disconnect the circuit, the user only needs to close the second microswitch 22 to connect the second electrical circuit. When the second electrical circuit is connected, the fuse 13 will short-circuit and disconnect the circuit, ensuring the safety of the circuit.
[0051] In one embodiment, it further includes: a frequency converter board 32; the frequency converter board 32 is electrically connected to the magnetron.
[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A switching mechanism, characterized by include: The circuit includes a positive terminal, a negative terminal, a first micro switch, a second micro switch, a fuse, and a power supply unit; the positive terminal, the fuse, the first micro switch, the power supply unit, and the negative terminal are sequentially electrically connected to form a first electrical circuit; the positive terminal, the fuse, the first micro switch, the second micro switch, and the negative terminal are sequentially electrically connected to form a second electrical circuit.
2. The switch mechanism of claim 1, wherein Also includes: The enclosure comprises a housing, a door rotatably mounted on the housing, a first triggering mechanism, and a second triggering mechanism; the door can switch between a first rotation position and a second rotation position; when the door rotates to the first rotation position, the door can trigger the first micro switch through the first triggering mechanism, and the door can trigger the second micro switch through the second triggering mechanism; the first micro switch is a normally open switch, and the second micro switch is a normally closed switch.
3. The switch mechanism of claim 2, wherein The first triggering mechanism includes: a first protrusion disposed on the door body, a first rotating member rotatably disposed on the housing, and a first reset member for holding the first rotating member in a first initial position; the first reset member connects the first rotating member and the housing; when the door body rotates to the first rotation position, the first protrusion can push the first rotating member to rotate and trigger the first micro switch.
4. The switching mechanism as described in claim 3, characterized in that, The first reset element is a first spring.
5. The switching mechanism as described in claim 3, characterized in that, The housing has a guide hole for guiding the first protrusion to move toward the first rotating member.
6. The switching mechanism as described in claim 2, characterized in that, The second triggering mechanism includes: a second rotating member rotatably disposed on the housing, a second protrusion disposed on the second rotating member, and a second reset member for holding the second rotating member in a second initial position; the second reset member connects the second rotating member and the housing; when the door rotates to the first rotation position, the door can push the second rotating member to rotate through the second protrusion and trigger the second micro switch.
7. The switching mechanism as described in claim 6, characterized in that, The second reset element is a second spring.
8. The switching mechanism as described in claim 6, characterized in that, The box body has a through hole, and the second protrusion passes through the through hole.
9. The switching mechanism as described in claim 3, characterized in that, Also includes: A third micro switch is provided on the housing; the door can be rotated to a third rotation position; the third rotation position is located between the first rotation position and the second rotation position; when the door rotates from the second rotation position to the third rotation position, the first rotating component triggers the third micro switch; the third micro switch is a normally open switch.
10. A microwave oven, characterized in that, include: The switching mechanism as described in any one of claims 1 to 8; The power supply unit is a magnetron.