Integrated interlocking lever of microwave oven interlocking switch device and switch device

Abstract

The utility model belongs to the technical field of kitchen utensils, and particularly relates to an integrated interlocking lever of a microwave oven interlocking switch device and a switch device, which comprise a door body, a fixed support, a door hook, a first microswitch, a second microswitch, an interlocking lever and a transmission shaft, the interlocking lever is arranged on the door hook and located between the first microswitch and the second microswitch, through the special design of the structure and the position of the interlocking lever, the triggering part of the interlocking lever is accurately matched with the door hook and the two microswitches, and therefore the microswitches are triggered in sequence. Through the arrangement of the components, the structure is simplified, the space layout is optimized, the reliability and the control precision are improved, and meanwhile the production and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen utensils technology, specifically relating to an integrated interlocking lever and switch device for microwave oven interlocking switch devices. Background Technology

[0002] Microwave oven interlocking switches play a crucial role in ensuring the safe use and normal operation of microwave ovens. A Chinese utility model patent, with publication number CN220135532U, entitled "A Microwave Oven Interlocking Switch Device," includes a door hook bracket, multiple door hooks, and multiple microswitch assemblies. Each microswitch assembly has a corresponding independent interlocking lever. This design with multiple independent interlocking levers presents several problems. Structurally, multiple interlocking levers increase the complexity of the device, making assembly more difficult, reducing production efficiency, and occupying more internal space in the microwave oven, which is detrimental to miniaturization. In terms of reliability, the large number of components also increases the potential for failure. Wear or loosening of any interlocking lever can cause the microswitch to fail to close properly, affecting the normal operation of the microwave oven. Furthermore, achieving precise synchronization when controlling the closing sequence and stroke of the microswitch with multiple independent levers is difficult, potentially impacting the safety performance of the microwave oven. Moreover, the complex structure increases the difficulty and cost of troubleshooting and repair. Utility Model Content

[0003] The purpose of this utility model is to provide an integrated interlocking lever and switching device for a microwave oven interlocking switch, aiming to solve many technical problems existing in the design of multiple independent interlocking levers in the microwave oven interlocking switch in the prior art.

[0004] To achieve the above objectives, this utility model provides an integrated interlocking lever and switching device for a microwave oven interlocking switch, characterized in that it includes a door body, a fixed bracket, a door hook, a first micro switch, a second micro switch, an interlocking lever, and a transmission shaft;

[0005] The fixed bracket is fixed on one side of the door body. The door hook can be inserted into or pulled out of the fixed bracket under the action of external force. The first micro switch and the second micro switch are fixed on the fixed bracket from top to bottom, and a space is reserved between them for the installation of the interlocking lever.

[0006] The interlocking lever is mounted on the fixed bracket and located between the first micro switch and the second micro switch. The interlocking lever has a groove, a first actuating part, a second actuating part, a protrusion, and a rotating shaft. The groove is located on the inclined side of the interlocking lever and near the top surface, with an arc-shaped inner surface. The first actuating part is located at the top of the interlocking lever and corresponds to the contact of the first micro switch. The second actuating part is located at the bottom of the interlocking lever and corresponds to the contact of the second micro switch. The protrusion is located on the side of the interlocking lever not adjacent to the fixed bracket. The rotating shaft is fixed to the fixed bracket, and the interlocking lever can rotate around the rotating shaft. The drive shaft is located below one side of the interlocking lever and cooperates with the protrusion to drive the interlocking lever to rotate.

[0007] Preferably, the door hook is provided with a pressing surface and a limiting surface. The pressing surface is used to contact the interlocking lever when the door is closed, so that the interlocking lever rotates to press the first micro switch and the second micro switch. The limiting surface is used to contact the limiting plate on the fixed bracket after the door is closed, so as to limit the position of the door hook in the fixed bracket.

[0008] Preferably, the first micro switch is fixedly mounted on the fixed bracket, and has a movable first micro switch contact. When the first micro switch contact is pressed by the interlocking lever, it retracts into the first micro switch, thereby closing the switch.

[0009] Preferably, the second micro switch is fixed on the fixed bracket, located below the first micro switch and to its left, and has a movable second micro switch contact. When the second micro switch contact is squeezed by the interlocking lever, it retracts into the second micro switch to close the switch.

[0010] Preferably, the interlocking lever is made of a material suitable for being molded into the shape and meeting the requirements for use of the interlocking lever, and is manufactured by an appropriate molding process, such as, but not limited to, injection molding of high-strength engineering plastics; the interlocking lever is a right trapezoid with each corner rounded, which facilitates smoother rotation and accurate triggering of the first and second microswitches when the door hook is squeezed.

[0011] Preferably, the position of the pivot at the interlocking lever is such that the weight on the right side of the interlocking lever is greater than the weight on the left side with the pivot as the center. When the door is opened and the door hook is released from contact with the interlocking lever, the interlocking lever can continue to rotate clockwise. The power source includes, but is not limited to, gravity, and can also be, for example, using micro-switch reset elasticity, spring force or motor driving force, or any combination thereof.

[0012] Preferably, a limiting block is provided on the right side of the interlocking lever, and the limiting block is fixed on the fixed bracket to limit the range of motion of the interlocking lever when the door is in the open state and the door hook is outside the fixed bracket.

[0013] The integrated interlocking lever and switching device of the microwave oven interlocking switch device provided in this embodiment of the utility model have at least one of the following technical effects:

[0014] The integrated interlocking lever and switch device of this invention for microwave oven interlocking switch integrates multiple independent interlocking levers into a single integrated interlocking lever, reducing the number of parts, lowering the assembly difficulty and complexity in the production process, improving production efficiency, and reducing production costs. Furthermore, the compact design of the integrated interlocking lever reduces the space occupied inside the microwave oven, facilitating miniaturization and providing more space for the layout of other components. The reduction in the number of parts means fewer potential failure points. The interlocking lever is a key component controlling the closing of the microswitch; reducing one lever lowers the failure rate caused by component wear, loosening, etc., improving the reliability and stability of the microwave oven interlocking switch device, extending the device's service life. The simplified structure also makes troubleshooting and maintenance easier, allowing maintenance personnel to quickly locate and resolve problems, reducing maintenance time and costs.

[0015] This utility model discloses an integrated interlocking lever and switch device for a microwave oven interlocking switch. Through innovative design of the position, structure, and shape of the interlocking lever, it can more accurately control the closing sequence and stroke of the micro switch, ensuring that the microwave oven can start and operate accurately and safely after the door is closed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a perspective view of an integrated interlocking lever and switching device for a microwave oven interlocking switch device provided in an embodiment of the present utility model.

[0018] Figure 2 This is a partial view of an integrated interlocking lever and the open state of a microwave oven interlocking switch device provided in an embodiment of the present invention.

[0019] Figure 3This is a partial view of an integrated interlocking lever and the closed state of a microwave oven interlocking switch device provided in an embodiment of the present invention.

[0020] The following are the labeling elements in the figure:

[0021] 10—Door body; 20—Fixed bracket; 30—Door hook; 31—Extrusion surface; 32—Limiting surface

[0022] 40—First micro switch; 41—First micro switch contact; 50—Second micro switch

[0023] 51—Second micro switch contact; 60—Interlocking lever; 61—Groove; 62—First actuating part

[0024] 63—Second trigger part; 64—Protrusion; 65—Rotating shaft; 66—Limiting block; 70—Drive shaft. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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.

[0027] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In one embodiment of this utility model, such as Figure 1-3 As shown, an integrated interlocking lever and switching device for a microwave oven interlocking switch is provided, including a door body 10, a fixed bracket 20, a door hook 30, a first micro switch 40, a second micro switch 50, an interlocking lever 60, and a transmission shaft 70.

[0030] A fixing bracket 20 is fixed to one side of the door body 10. The fixing bracket 20 serves to fix and install the first micro switch 40, the second micro switch 50, and the interlocking lever 60. The door hook 30 can be inserted into or pulled out of the fixing bracket 20 under external force, and the position of the door hook 30 corresponds to the interlocking lever 60 and can press against the interlocking lever 60. The first micro switch 40 and the second micro switch 50 are fixedly mounted on the fixing bracket 20 from top to bottom, and a space is reserved between the first micro switch 40 and the second micro switch 50 for interlocking. The interlocking lever 60 is installed in the space provided by the fixed bracket 20 and is located between the first micro switch 40 and the second micro switch 50. The interlocking lever 60 is used to press and release the first micro switch 40 and the second micro switch 50 under the pressing and releasing action of the door hook 30, thereby causing the first micro switch 40 and the second micro switch 50 to generate switching signals and transmit them to the control board. The drive shaft 70 is located below one side of the interlocking lever 60 and is used to drive the interlocking lever 60 to rotate.

[0031] The door hook 30 is provided with a pressing surface 31 and a limiting surface 32. When the door is closed, the pressing surface 31 contacts the interlocking lever 60, causing the interlocking lever 60 to rotate, thereby pressing the first micro switch 40 and the second micro switch 50. After the door is closed, the limiting surface 32 contacts the limiting plate on the fixed bracket 20, thereby restricting the position of the door hook 30 within the fixed bracket 20.

[0032] The first micro switch 40 is fixedly mounted on the fixed bracket 20. The first micro switch 40 is provided with a first micro switch contact 41. The first micro switch contact 41 is movably mounted on the first micro switch 40. When it is squeezed by the interlocking lever 60, it retracts into the first micro switch 40, thereby closing the first micro switch 40.

[0033] The second micro switch 50 is fixed on the fixed bracket 20, located below the first micro switch 40 and to the left of the first micro switch 40. The second micro switch 50 is provided with a second micro switch contact 51, which is movably disposed on the second micro switch 50. When squeezed by the interlocking lever 60, the contact 51 retracts into the second micro switch 50, thereby closing the second micro switch 50.

[0034] The interlocking lever 60 is injection molded from high-strength engineering plastic. The material has good mechanical strength, wear resistance and insulation properties. The interlocking lever 60 is in the shape of a right trapezoid with each corner rounded. The interlocking lever 60 is provided with a groove 61.

[0035] The groove 61 is located on the inclined side of the interlocking lever 60 and near the top surface of the interlocking lever 60. The inner surface of the groove 61 is arc-shaped. When the door is closed, the interlocking lever 60 rotates under the action of the door hook 30, which squeezes the first micro switch contact 41. The first micro switch contact 41 contracts, and the first micro switch 40 closes. The groove 61 is designed to provide space for the first micro switch contact 41 after release, so that the first micro switch 40 closes first.

[0036] The interlocking lever 60 has a first actuating part 62 above the side with the groove 61. The first actuating part 62 is located at the top of the interlocking lever 60. The first actuating part 62 is correspondingly arranged with the first micro switch contact 41. When the door 10 is in the closed state, the first actuating part 62 squeezes the first micro switch contact 41, causing the first micro switch contact 41 to contract, thereby closing the first micro switch 40.

[0037] The interlocking lever 60 is provided with a second actuating part 63, which is located at the bottom of the interlocking lever 60. The second actuating part 63 is correspondingly arranged with the second micro switch contact 51. When the door 10 is in the closed state, the second actuating part 63 squeezes the second micro switch contact 51, causing the second micro switch contact 51 to contract, thereby closing the second micro switch 50.

[0038] The interlocking lever 60 has a protrusion 64 on the side not adjacent to the fixed bracket 20. The protrusion 64 cooperates with the transmission shaft 70 and drives the interlocking lever 60 to rotate under the action of the transmission shaft 70.

[0039] The interlocking lever 60 is provided with a rotating shaft 65, which is fixed on the fixed bracket 20. The rotating shaft 65 serves to install the interlocking lever 60 and allow the interlocking lever 60 to rotate around the rotating shaft 65.

[0040] Preferably, the position of the pivot 65 at the interlocking lever 60 is such that, with the pivot 65 as the center, the weight on the right side of the interlocking lever 60 is greater than the weight on the left side. This allows the interlocking lever 60 to continue rotating clockwise when the door hook 30 disengages from the interlocking lever 60 during the opening of the door 10. That is, the two contact parts of the interlocking lever 60 move away from the corresponding two microswitches and are then restricted by the limit block, preparing the interlocking lever 60 for the next closing operation. The power source for the interlocking lever 60 to continue rotating clockwise here includes, but is not limited to, gravity. For example, the elasticity of the microswitch when it resets can be used to rotate the interlocking lever 60, thereby disengaging the corresponding microswitch. Springs, motors, and other power sources can also be used.

[0041] A limiting block 66 is provided on the right side of the interlocking lever 60. The limiting block 66 is fixed on the fixed bracket 20. When the door 10 is in the open state and the door hook 30 is outside the fixed bracket 20, the limiting block 66 restricts the range of motion of the interlocking lever 60, so that the interlocking lever 60 is ready for the next closing operation.

[0042] The working principle of this utility model is as follows: An integrated interlocking lever and switching device for a microwave oven interlocking switch. When the user closes the microwave oven door 10, the door hook 30 on the door 10 gradually approaches and inserts into the fixed bracket 20 under external force. The pressing surface 31 on the door hook 30 contacts and applies pressure to the inclined surface of the interlocking lever 60 with a groove 61. Since the interlocking lever 60 is mounted on the fixed bracket 20 via a rotating shaft 65 and can rotate around it, under the pressure of the pressing surface 31, the interlocking lever 60 begins to rotate around the rotating shaft 65. During the rotation of the interlocking lever 60, the portion of the groove 61 near the top surface on its inclined side, close to the first actuating part 62, first contacts the first microswitch contact 41 on the first microswitch 40 and presses it. The inner surface of the groove 61 is arc-shaped. This design allows the groove 61 to accurately and smoothly press the first microswitch contact 41 when the interlocking lever 60 rotates. Then, as the interlocking lever 60 rotates around the pivot 65, the first actuating part 62 and the first microswitch contact 41 are stably and firmly retracted into the first microswitch 40, thereby closing the first microswitch 40 and transmitting an initial signal to the control panel that the door 10 is closing. As the door continues to close, the interlocking lever 60 rotates further. At this time, the second actuating part 63 at the bottom of the interlocking lever 60 corresponds to and presses the second microswitch contact 51 on the second microswitch 50. When the second microswitch contact 51 is pressed, it retracts into the second microswitch 50, causing the second microswitch 50 to close and transmitting a signal to the control board that the door is fully closed and the interlock is in place. After receiving this series of signals, the control board determines that the door is properly closed and the interlock device is working properly, and allows the microwave oven to start the relevant functions.

[0043] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.

[0044] 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 and improvements 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. An integrated interlocking lever and switching device for a microwave oven interlocking switch, characterized in that: It includes a door body (10), a fixed bracket (20), a door hook (30), a first micro switch (40), a second micro switch (50), an interlocking lever (60), and a drive shaft (70). The fixed bracket (20) is fixed on one side of the door body (10). The door hook (30) can be inserted into or pulled out of the fixed bracket (20) under the action of external force. The first micro switch (40) and the second micro switch (50) are fixed on the fixed bracket (20) from top to bottom, and a space is reserved between them for the installation of the interlocking lever (60). The interlocking lever (60) is mounted on the fixed bracket (20) and located between the first micro switch (40) and the second micro switch (50). The interlocking lever (60) is provided with a groove (61), a first actuating part (62), a second actuating part (63), a protrusion (64), and a rotating shaft (65). The groove (61) is located on the inclined side of the interlocking lever (60) and is positioned near the top surface, with an arc-shaped inner surface. The first actuating part (62) is located at the top of the interlocking lever (60) and is adjacent to the first micro switch contact (41) provided on the first micro switch (40). Correspondingly; the second actuating part (63) is located at the bottom of the interlocking lever (60) and corresponds to the second micro switch contact (51) provided on the second micro switch (50); the protrusion (64) is provided on the side of the interlocking lever (60) that is not adjacent to the fixed bracket (20); the rotating shaft (65) is fixed on the fixed bracket (20), and the interlocking lever (60) can rotate around the rotating shaft (65); the transmission shaft (70) is located below one side of the interlocking lever (60) and cooperates with the protrusion (64) to drive the interlocking lever (60) to rotate.

2. The integrated interlocking lever and switching device of the microwave oven interlocking switch device according to claim 1, characterized in that, The door hook (30) is provided with a pressing surface (31) and a limiting surface (32). The pressing surface (31) is used to contact the interlocking lever (60) when the door is closed, so that the interlocking lever (60) rotates to press the first micro switch (40) and the second micro switch (50). The limiting surface (32) is used to contact the limiting plate on the fixed bracket (20) after the door is closed, so as to limit the position of the door hook (30) in the fixed bracket (20).

3. The integrated interlocking lever and switching device of the microwave oven interlocking switch device according to claim 1, characterized in that, The first micro switch (40) is fixedly mounted on the fixed bracket (20), and a movable first micro switch contact (41) is provided thereon.

4. The integrated interlocking lever and switching device of the microwave oven interlocking switch device according to claim 1, characterized in that, The second micro switch (50) is fixed on the fixed bracket (20), located below the first micro switch (40) and to its left, and has a movable second micro switch contact (51) on it.

5. The integrated interlocking lever and switching device of the microwave oven interlocking switch device according to claim 1, characterized in that, The interlocking lever (60) is injection molded from high-strength engineering plastic; the interlocking lever (60) is a right trapezoid with each corner rounded, which is conducive to smoother rotation and accurate triggering of the first micro switch (40) and the second micro switch (50) when the door hook (30) is squeezed.

6. The integrated interlocking lever and switching device of the microwave oven interlocking switch according to claim 1, characterized in that, The position of the pivot (65) on the interlocking lever (60) is such that the weight on the right side of the interlocking lever (60) is greater than the weight on the left side with the pivot (65) as the center. When the door (10) is opened and the door hook (30) is released from contact with the interlocking lever (60), the interlocking lever (60) can continue to rotate clockwise. The power source includes, but is not limited to, gravity, and can also be, for example, using micro-switch reset elasticity, spring force or motor driving force, or any combination thereof.

7. The integrated interlocking lever and switching device of the microwave oven interlocking switch according to claim 1, characterized in that, The interlocking lever (60) has a limiting block (66) on its right side. The limiting block (66) is fixed to the fixed bracket (20) and is used to limit the range of motion of the interlocking lever (60) when the door (10) is in the open state and the door hook (30) is outside the fixed bracket (20).

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